WO2025148698A1 - Powder inhaler, air inflow baffle, dose protection plate, inhalation trigger mechanism, airbag pressing member, driving cam, and gas compressing mechanism - Google Patents

Abstract

Provided are a powder inhaler, an air inflow baffle, a dose protection plate, an inhalation trigger mechanism, an airbag pressing member, a driving cam, and a gas compressing mechanism. The powder inhaler comprises a functional mechanism, a mouth piece (101), and an outer cover (4). The functional mechanism comprises an inhalation channel (706) in communication with the mouth piece (101). The outer cover (4) is in linkage fit with the functional mechanism and is limited to rotatably reciprocate between a first position and a second position. The outer cover is configured to shield the mouth piece (101) when in the first position and not shield the mouth piece (101) when in the second position. The rotation of the outer cover (4) from the first position to the second position comprises a cover-opening idle stroke and a cover-opening load stroke. During the cover-opening idle stroke, the outer cover (4) does not trigger the functional mechanism to operate, and during the cover-opening load stroke, the outer cover (4) triggers the functional mechanism to deliver powder to the inhalation channel (706). The reset from the second position to the first position comprises a cover-closing idle stroke and a cover-closing load stroke. During the cover-closing idle stroke, the outer cover (4) does not trigger the functional mechanism to operate, and during the cover-closing load stroke, the outer cover (4) triggers the functional mechanism to reset. By means of the described arrangement, the linkage between mechanisms is achieved.

Description

Powder inhaler, air intake baffle, dose protection plate, inhalation trigger mechanism, air bag pressure piece, drive cam, air compression mechanism

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority based on Chinese patent applications 202410051869.2, 202410055013.2, 202410051884.7 and 202410051892.1 filed on January 12, 2024, and all of their contents are incorporated herein by reference.

Technical Field

The present application relates to the technical field of inhalation apparatus, and in particular to a powder inhaler, an air intake baffle, a dose protection plate, an inhalation trigger mechanism, an air bag pressing piece, a driving cam and an air compression mechanism.

Background Art

A powder inhaler generally includes a housing assembly and various functional mechanisms, and distributes powdered drug preparations by airflow inhalation to inhale powder from a powder metering component into a mouthpiece for inhalation by a user.

However, due to structural limitations, the existing powder inhalers cannot well realize the linkage of various systems of the device during the opening and closing of the cover, and there are problems such as complex powder delivery methods, uncontrollable delivery amounts, and easy waste of powder. It is impossible to ensure the protection of powders such as medicinal powders when the airflow is inhaled at a low speed. During the user's inhalation process, the airflow has a poor effect on the deagglomeration of the medicinal powder, resulting in low utilization of the medicinal powder and easy waste of the medicinal powder.

Summary of the invention

The present application mainly provides a powder inhaler, an air intake baffle, a dose protection plate, an inhalation trigger mechanism, an air bag pressing piece, a driving cam and an air compression mechanism, so as to solve the problem that various mechanisms of the device cannot achieve good linkage during the opening and closing process of the powder inhaler cover in the prior art.

In order to solve the above technical problems, a technical solution adopted in the present application is to provide a powder inhaler, comprising:

Functional mechanisms, including suction channels;

A suction nozzle, connected to the suction channel;

The outer cover cooperates with the functional mechanism and is limited to rotate back and forth between a first position and a second position; when the outer cover is configured to the first position, the outer cover covers the suction nozzle; when the outer cover is configured to the second position, the outer cover does not cover the suction nozzle;

The stroke of the outer cover rotating from the first position to the second position includes an open cover idle stroke and an open cover load stroke after the open cover idle stroke; in the open cover idle stroke, the outer cover does not trigger the action of the functional mechanism; in the open cover load stroke, the outer cover triggers the functional mechanism to deliver powder to the inhalation channel; and/or

The stroke of the outer cover rotating from the second position to the first position includes a cover-closing idle stroke and a cover-closing load stroke after the cover-closing idle stroke; within the cover-closing idle stroke, the outer cover does not trigger the action of the functional mechanism; within the cover-closing load stroke, the outer cover triggers the functional mechanism to reset.

Wherein, the lid opening idle stroke includes a first lid opening idle stroke and a second lid opening idle stroke after the first lid opening idle stroke; wherein, the torque in the second lid opening idle stroke is greater than the torque in the first lid opening idle stroke;

Preferably, the torque increases gradually or suddenly during the process of switching from the first lid opening idle stroke to the second lid opening idle stroke.

Wherein, the cover opening load stroke includes a first cover opening load stroke and a second cover opening load stroke after the first cover opening load stroke;

Wherein, the torque of the first lid opening load stroke is smaller than the torque of the second lid opening load stroke and/or the lid opening idle stroke.

Wherein, the cover closing idle stroke includes a first cover closing idle stroke and a second cover closing idle stroke after the first cover closing idle stroke;

Wherein, the torque of the first closing cover idle stroke is greater than the second closing cover idle stroke;

Preferably, the torque within the idle stroke of the first closing cover is constant or gradually increases.

Wherein, the cover closing load stroke comprises a first cover closing load stroke, a second cover closing load stroke and a third cover closing load stroke which are arranged in chronological order;

Wherein, the torque of the second cover load stroke is greater than the torque of the first cover load stroke and/or the third cover load stroke;

Preferably, the torque of the load stroke of the third door cover is greater than or equal to the torque of the load stroke of the first door cover;

Preferably, the torque of the second closing cover load stroke and/or the first closing cover load stroke increases gradually.

Wherein, the functional mechanism includes: an air compression mechanism;

A powder delivery mechanism comprises a storage chamber and a dosage cup; the storage chamber is used to store powder, and the storage chamber has a powder outlet; the cover opening load stroke comprises a first cover opening load stroke and a second cover opening load stroke after the first cover opening load stroke; the outer cover triggers the air compression mechanism to press the powder from the storage chamber into the dosage cup in the first cover opening load stroke; the outer cover drives the dosage cup to deliver the powder to the inhalation channel in the second cover opening load stroke.

Wherein, the delivery mechanism comprises a powder container and a powder metering wheel; the powder container has an inhalation channel and the storage chamber; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises the dosage cup;

The outer cover triggers the air compression mechanism within the first cover opening load stroke to first compress air into the powder container and then relieve the pressure of the powder container;

Wherein, the powder metering wheel is capable of rotating back and forth between a third position and a fourth position; when the powder metering wheel is configured to the third position, the dosage cup is correspondingly arranged with the powder outlet of the storage chamber for receiving the powder from the powder container; when the powder metering wheel is configured to the fourth position, the dosage cup is correspondingly arranged with the entrance of the inhalation channel; and the outer cover drives the dosage cup to rotate from the third position to the fourth position within the second lid opening load stroke.

The powder inhaler further comprises: an inhalation trigger mechanism, comprising a dosage protection plate, an air intake baffle, a reset torsion spring and a drive torsion spring that cooperate with each other; the reset torsion spring limits the air intake baffle to the air flow channel; the dosage protection plate is limited by the air intake baffle to the entrance of the inhalation channel and blocks the dosage cup;

Wherein, the outer cover squeezes the return torsion spring within the second cover opening load stroke, thereby releasing the limit of the return torsion spring on the air intake baffle;

When the negative pressure of the airflow channel is greater than a threshold, the air inlet baffle rotates under the action of the airflow to release the limit on the dose protection plate, and the dose protection plate rotates and deviates under the action of the driving torsion spring without covering the dose cup of the powder metering wheel.

Wherein, the functional mechanism includes: an air compression mechanism;

A powder delivery mechanism comprises a powder container and a powder metering wheel; the powder container has a storage cavity for storing powder; the powder metering wheel is rotatably connected to the powder container;

Among them, the closing cover load stroke includes a first closing cover load stroke, a second closing cover load stroke and a third closing cover load stroke which are arranged in chronological order; the outer cover only triggers the powder metering wheel to reset and rotate within the first closing cover load stroke; the outer cover continues to trigger the powder metering wheel to reset and rotate within the second closing cover load stroke and triggers the air compression mechanism to complete the reset; the outer cover only triggers the powder metering wheel to reset and rotate within the third closing cover load stroke, and triggers the powder metering wheel to reset and rotate to the first position.

The powder inhaler further comprises: an inhalation trigger mechanism, comprising a dosage protection plate, an air intake baffle, a reset torsion spring and a drive torsion spring that cooperate with each other; the reset torsion spring limits the air intake baffle to the air flow channel; the dosage protection plate is limited by the air intake baffle to the entrance of the inhalation channel and blocks the dosage cup;

Wherein, the outer cover squeezes the return torsion spring within the cover opening load stroke, thereby releasing the limit of the return torsion spring on the air intake baffle;

When the negative pressure of the airflow channel is greater than a threshold value, the air inlet baffle rotates under the action of the airflow to open the airflow channel and releases the limit on the dose protection plate. The dose protection plate rotates and deviates under the action of the driving torsion spring so as not to cover the dose cup of the powder metering wheel.

Furthermore, the outer cover also triggers the dose protection plate and the air intake baffle to reset within the cover closing load stroke.

Wherein, within the first cover closing load stroke and the second cover closing load stroke, the outer cover drives the dose protection plate to return to a position beyond the entrance of the inhalation channel through the powder metering wheel and compresses the driving torsion spring; at the same time, the return torsion spring drives the air intake baffle to return and rotate and close the airflow channel;

When the outer cover is in the third cover load stroke, the powder metering wheel is decoupled from the dose protection plate, the drive torsion spring drives the dose protection plate to rotate to the entrance of the inhalation channel, and is limited by the air intake baffle at the entrance of the inhalation channel.

The angle of the outer cover when it is in the first position is defined as 0 degrees, and the angle of the outer cover when it is in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees;

Preferably, the angle of the outer cover when in the second position is 150 degrees;

The critical angle between the cover opening idle stroke and the cover opening load stroke is greater than or equal to 10 degrees and less than or equal to 15 degrees; and/or, the torque of the outer cover in the cover opening idle stroke is greater than or equal to 0.05N·m and less than or equal to 0.3N·m, and the torque of the outer cover in the cover opening load stroke is greater than or equal to 0N·m and less than or equal to 0.15N·m; and/or,

The lid opening idle stroke includes a first lid opening idle stroke and a second lid opening idle stroke after the first lid opening idle stroke; a critical angle between the first lid opening idle stroke and the second lid opening idle stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees; and/or, the torque of the outer cover in the first lid opening idle stroke is greater than or equal to 0.02N·m and less than or equal to 0.08N·m, and the torque of the outer cover in the second lid opening idle stroke is greater than or equal to 0.1N·m and less than or equal to 0.2N·m; and/or,

The cover opening load stroke includes a first cover opening load stroke and a second cover opening load stroke after the first cover opening load stroke; a critical angle between the first cover opening load stroke and the second cover opening load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees; and/or, the torque of the outer cover within the first cover opening load stroke is constant, which is greater than or equal to 0 N·m and less than or equal to 0.05 N·m; the torque of the outer cover within the second cover opening load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m; and/or,

The critical angle between the cover-closing idle stroke and the cover-closing load stroke is greater than or equal to 80 degrees and less than or equal to 95 degrees; and/or, the maximum torque of the outer cover in the cover-closing idle stroke is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m; the maximum torque of the outer cover in the cover-closing load stroke is greater than 0.05 N·m and less than or equal to 0.3 N·m; and/or,

The cover closing idle stroke includes a first cover closing idle stroke and a second cover closing idle stroke after the first cover closing idle stroke; a critical angle between the first cover closing idle stroke and the second cover closing idle stroke is greater than or equal to 135 degrees and less than or equal to 145 degrees; and/or, the torque of the outer cover in the first cover closing idle stroke is constant, which is greater than or equal to 0.03N·m and less than or equal to 0.07N·m; the torque of the outer cover in the second cover closing idle stroke is constant, which is less than or equal to 0.02N·m; and/or,

The closing cover load stroke includes a first closing cover load stroke, a second closing cover load stroke and a third closing cover load stroke which are arranged in chronological order; a critical angle between the first closing cover load stroke and the second closing cover load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees; a critical angle between the second closing cover load stroke and the third closing cover load stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees; and/or, the torque of the outer cover within the first closing cover load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m; the torque of the outer cover within the second closing cover load stroke gradually increases, and its maximum value is greater than or equal to 0.15 N·m and less than or equal to 0.3 N·m; the torque of the outer cover within the third closing cover load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m.

In order to solve the above technical problems, a technical solution adopted by the present application is to provide an air intake baffle for a powder inhaler, comprising:

Baffle body;

The first surface of the baffle body has a boss, and the outer peripheral side surface of the boss is spaced apart from the outer peripheral side surface of the baffle body.

Wherein, the boss covers the central area of the first surface of the baffle body.

Wherein, along the circumference of the boss, the outer peripheral side surface of the boss and the outer peripheral side surface of the baffle body are evenly spaced apart; and the portion of the first surface of the baffle body not covered by the boss forms an annular surface.

Wherein, the air intake baffle further comprises a rotating shaft, which is arranged at the first end of the baffle body;

Along the direction from the first end to the opposite second end of the baffle body, the height of the boss gradually decreases, so that the top surface of the boss forms an inclined surface.

Wherein, the baffle body is recessed to form the boss.

Wherein, the air intake baffle further comprises a rotating shaft and a rotating member; the rotating shaft is arranged at one end of the baffle body; the rotating member is connected to the free end of the rotating shaft and is spaced apart from the baffle body;

Wherein, the first end of the rotating member has a curved surface.

Wherein, the second end of the rotating member has a protruding cylinder on a surface away from the baffle body.

There are two rotating shafts, which are respectively arranged on opposite sides of the baffle body and are defined as a first rotating shaft and a second rotating shaft; there are two rotating members, which are defined as a first rotating member and a second rotating member;

The first rotating member is connected to the free end of the first rotating shaft, the first end of the first rotating member has a first curved surface, and the surface of the second end away from the baffle body has the protruding cylinder;

The second rotating member is connected to the free end of the second rotating shaft, the first end of the second rotating member has a second curved surface, and the second end has a circular arc groove surface.

There are two rotating shafts, which are respectively arranged on opposite sides of the baffle body; one end of each rotating shaft is connected to the side surface of the baffle body;

The side surface of the baffle body also has a boss surrounding the rotating shaft, and the boss is spaced apart from the rotating member.

In order to solve the above technical problems, another technical solution adopted by the present application is to provide a dose protection plate for a powder inhaler, comprising:

Ring-shaped body;

The shielding portion is connected to one end of the annular body and is used to shield or not shield the dosage cup of the powder inhaler.

Wherein, the dose protection plate further comprises a pressing piece, and the pressing piece is arranged on the outer side surface of the annular body; and the surface of the pressing piece away from the annular body comprises a pressing arc surface.

Wherein, the pressing member comprises a cylindrical convex surface, and the cylindrical convex surface is arranged on one side of the pressing arc surface.

Wherein, the dose protection plate further comprises an elastic arm hook, one end of which is connected to the annular body.

Wherein, the dose protection plate further includes a wedge-shaped column, one end of which is connected to the annular body.

In order to solve the above technical problems, another technical solution adopted by the present application is to provide an inhalation trigger mechanism, comprising:

Any of the air intake baffles as described above; and/or

A dose protection plate as described above.

In order to solve the above technical problems, another technical solution adopted by the present application is to provide a powder inhaler, comprising:

A powder delivery mechanism, comprising a powder container and a powder metering wheel; the powder container has a storage chamber, an inhalation channel and an air flow channel; the inhalation channel is communicated with the air flow channel; the storage chamber is used to store powder, and the storage chamber has a powder outlet; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises a dosage cup; the dosage cup is used to receive the powder from the powder outlet and deliver the powder to the inlet of the inhalation channel;

The inhalation trigger mechanism as described above; wherein the air intake baffle is rotatably connected to the side wall of the air flow channel, and the first surface of the baffle body faces the outside of the port of the air flow channel; the dose protection plate is rotatably connected to the powder container; the air intake baffle is linked to the dose protection plate;

Wherein, when the air inhalation trigger mechanism is in the initial state, the air inlet baffle blocks the air flow channel, and the inhalation channel is not connected to the outside atmosphere; the shielding portion shields the powder outlet of the dosage cup located at the entrance of the inhalation channel;

When the negative pressure inside the suction channel is greater than a threshold value, the air intake baffle rotates to open the airflow channel and triggers the dose protection plate to rotate, so that the shielding portion deviates and does not block the powder outlet of the dose cup, and the airflow channel connects the outside atmosphere and the suction channel.

Wherein, the powder inhaler further comprises:

A housing assembly, comprising a front housing, the front housing having a suction nozzle, the suction nozzle being arranged corresponding to the suction channel and being connected to the suction channel; a side wall of the front housing having an air inlet and a grille, the grille protruding from an outer wall surface of the front housing; an inner wall surface of the front housing having an annular flange surrounding the air inlet, one end of the annular flange being arranged in the air flow channel, and the side wall of the front housing blocking a port of the air flow channel;

The air intake baffle has the annular surface; when the air intake trigger mechanism is in the initial state, the boss is embedded in the annular flange, the inner peripheral side surface of the annular flange and the outer peripheral side surface of the boss are spaced and matched to form a first flow channel section, the end surface of the annular flange away from the end of the front shell body abuts against the annular surface and matches to form a second flow channel section, and the first flow channel section and the second flow channel section form an L-shaped intake flow channel; the compression arc surface cooperates with the arc groove surface of the air intake baffle to achieve concentric arc surface compression;

When the negative pressure inside the suction channel is greater than a threshold value, the air intake baffle rotates to open the air flow channel, and the air flow channel is connected to the outside atmosphere through the air intake port.

Wherein, the ratio of the distance between the top surface of the boss and the first surface of the baffle body to the thickness of the annular flange is 1:2-7:1.

Wherein, the side wall of the front housing is provided with at least two air inlets and at least one grille, and the grilles and the air inlets are arranged alternately; the annular flange is arranged around the air inlets and the grilles;

The side wall of the airflow channel is connected to the side wall of the storage chamber, and one end of the side wall of the airflow channel connected to the side wall of the storage chamber is provided with a first guide hole and a second guide hole spaced apart from each other; the end of the suction channel close to the suction nozzle is provided with a first airflow inlet and a second airflow inlet spaced apart from each other, the first guide hole connects the airflow channel and the first airflow inlet, and the second guide hole connects the airflow channel and the second airflow inlet;

The inner wall surface of the front shell and the outer wall surface of the suction channel are spaced apart to form a guide channel, and the guide channel connects the airflow channel with the first airflow inlet and the second airflow inlet.

Wherein, the powder inhaler further comprises:

an outer cover, rotatably connected to the housing assembly and capable of reciprocating between a first position and a second position; when the outer cover is configured to be in the first position, the outer cover covers the suction nozzle and the air inlet; when the outer cover is configured to be in the second position, the suction nozzle and the air inlet are exposed;

a gas compression mechanism, disposed on the powder container, for pressing the powder in the powder container into the dosage cup;

The powder metering wheel can rotate back and forth between a third position and a fourth position; when the powder metering wheel is configured to the third position, the dosage cup is arranged correspondingly to the powder outlet of the storage chamber; when the powder metering wheel is configured to the fourth position, the dosage cup is arranged correspondingly to the entrance of the inhalation channel;

The outer cover is respectively linked with the powder delivery mechanism and the air compression mechanism; when the outer cover rotates from the first position to the second position, the air compression mechanism is first driven to press the powder in the storage chamber into the dosage cup, and then the powder metering wheel is driven to rotate from the third position to the fourth position;

During the process of the outer cover reversing and resetting from the second position to the first position, the powder metering wheel, the dose protection plate and the air compression mechanism are respectively driven to reset, and the air intake baffle is triggered to reverse and reset.

In order to solve the above technical problems, a technical solution adopted in the present application is: to provide an airbag pressing piece for a powder inhaler; the side wall of the airbag pressing piece has a pressure relief hole; the airbag pressing piece is used to squeeze the compressed air bag.

Wherein, one end of the side wall of the airbag pressure piece away from the top wall has a convex rod, and one end of the convex rod away from the top wall has a curved surface.

Wherein, one end of the convex rod away from the top wall has a tip, and the end surface of the tip is the arc surface.

Wherein, the arc surface is a circular arc surface.

Wherein, the top wall of the airbag pressing piece has a fixing hole, and the fixing hole is used to connect the top of the compressed airbag to drive the compressed airbag to expand and contract.

In order to solve the above technical problems, another technical solution adopted by the present application is to provide a driving cam for a powder inhaler, comprising:

Body part;

A gear, coaxially connected to the main body, and used to drive the main body to rotate;

Wherein, a surface of the main body is provided with a guide groove, and a side surface of the guide groove is a cam curved surface.

Wherein, the outer peripheral side surface of the main body has an arc-shaped groove located at one end of the cam curved surface.

Wherein, the gear is arranged on a surface of the main body, and the guide groove is arranged on the surface of the main body facing the gear and is spaced apart from the gear;

The cam surface includes a first curved surface segment and a second curved surface segment connected to each other, and the second curved surface segment is located at an end of the first curved surface segment away from the arc-shaped groove; the first curved surface segment is a non-circular curved surface, and the second curved surface segment is a circular curved surface and is concentrically arranged with the outer peripheral side surface of the main body.

Wherein, a stop groove is arranged at one end of the second curved surface segment away from the first curved surface segment.

Wherein, the arc-shaped groove and/or the stop groove are/is an arc-shaped groove.

Wherein, a surface of the main body portion facing away from the gear has a convex rib; one end of the convex rib is arranged corresponding to the end of the second curved surface segment close to the first curved surface segment.

Wherein, the surface of the main body away from the gear also has an annular boss; the annular boss is coaxially arranged with the gear.

In order to solve the above technical problems, another technical solution adopted by the present application is to provide an air compression mechanism, comprising:

Pressurized air bag;

Elastic parts;

Any one of the airbag pressing pieces as described above; and/or

Any of the drive cams described above.

Wherein, the arc surface of the convex rod cooperates with the cam curved surface of the driving cam to realize the reciprocating movement of the airbag pressing piece between the fifth position and the sixth position;

When the airbag pressing piece is configured to be in the initial position, the tip of the convex rod is embedded in the arc-shaped groove of the cam curved surface to achieve the initial positioning of the airbag pressing piece.

In order to solve the above technical problems, another technical solution adopted by the present application is to provide a powder inhaler, comprising:

A powder delivery mechanism comprises a powder container; the powder container has a storage cavity, a first end of the storage cavity has a powder outlet, and a second end of the storage cavity has a compressed air port; a side wall of the storage cavity has a vent hole;

A gas compression mechanism as described above;

Wherein, the compressed air bag is arranged at the second end of the storage cavity and is connected to the compressed air port; the air bag pressing piece is movably sleeved on the outer side of the compressed air bag and the storage cavity;

The driving cam and the elastic member are used to drive the airbag pressure piece to move back and forth between the fifth position and the sixth position, thereby driving the compressed air bag to expand and contract; when the airbag pressure piece is configured to the fifth position, the side wall of the airbag pressure piece blocks the vent hole, and the pressure relief hole is not connected to the vent hole; when the airbag pressure piece is configured to the sixth position, the pressure relief hole is connected to the vent hole to relieve pressure in the storage chamber.

Wherein, the powder inhaler further comprises:

A filter membrane is arranged at the second end of the storage cavity; the filter membrane is located at the compressed air port and is spaced apart from the port of the compressed air port; one end of the vent is connected to the space between the filter membrane and the compressed air bag;

A housing assembly having a suction nozzle;

an outer cover, rotatably connected to the housing assembly and capable of reciprocating between a first position and a second position; when the outer cover is configured to be in the first position, the outer cover covers the suction nozzle; when the outer cover is configured to be in the second position, the suction nozzle is exposed;

The powder delivery mechanism further includes a powder metering wheel; the powder container further includes an inhalation channel, the inhalation nozzle is connected to the inhalation channel; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel includes a dosage cup; the powder metering wheel can rotate back and forth between a third position and a fourth position; when the powder metering wheel is configured to the third position, the dosage cup is correspondingly arranged at the powder outlet of the storage chamber for receiving the powder from the powder container; when the powder metering wheel is configured to the fourth position, the dosage cup is correspondingly arranged at the entrance of the inhalation channel;

The outer cover is respectively linked with the powder metering wheel and the air compression mechanism; when the outer cover is configured to be in the first position, the airbag pressure piece is limited to the fifth position; during the process of the outer cover rotating from the first position to the second position, the airbag pressure piece is firstly released from the limit, so that the elastic member drives the airbag pressure piece to move from the fifth position to the sixth position, and then drives the powder metering wheel to rotate from the third position to the fourth position;

During the process of the outer cover being reversed and reset from the second position to the first position, the powder metering wheel is driven to be reversed and reset, and the airbag pressing piece is driven to move in the opposite direction and reset to the fifth position.

The beneficial effects of the present application are as follows: Different from the prior art, the present application discloses a powder inhaler, an air intake baffle, a dose protection plate, an inhalation trigger mechanism, an air bag pressure piece, a driving cam and an air compression mechanism, and the powder inhaler includes a functional mechanism, a mouthpiece and an outer cover. The functional mechanism includes an inhalation channel; the mouthpiece is connected to the inhalation channel; the outer cover cooperates with the functional mechanism and is limited to rotate back and forth between the first position and the second position; when the outer cover is configured to the first position, the mouthpiece is blocked, and when the outer cover is configured to the second position, the mouthpiece is not blocked. The stroke of the outer cover rotating from the first position to the second position includes an open cover empty stroke and an open cover load stroke after the open cover empty stroke; in the open cover empty stroke, the outer cover does not trigger the action of the functional mechanism; in the open cover load stroke, the outer cover triggers the functional mechanism to deliver powder to the inhalation channel; and/or, the stroke of the outer cover rotating from the second position to the first position includes a closed cover empty stroke and a closed cover load stroke after the closed cover empty stroke; in the closed cover empty stroke, the outer cover does not trigger the action of the functional mechanism, and in the closed cover load stroke, the outer cover triggers the functional mechanism to reset. Through the above-mentioned settings, the powder inhaler achieves good linkage between various functional mechanisms during the process of opening and closing the cover, thereby improving the performance of the powder inhaler.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

FIG1 is a schematic structural diagram of a powder inhaler provided in an embodiment of the present application in an uncapped state;

FIG2 is a schematic structural diagram of the powder inhaler provided in FIG1 in an open cover state;

FIG3 is a schematic structural diagram of the powder inhaler provided in FIG1 in another open cover state;

FIG4 is a schematic structural diagram of the powder inhaler provided in FIG3 at another angle;

FIG5A is a schematic diagram of the structure of the outer cover of the powder inhaler provided in FIG1 at an angle;

FIG5B is a schematic structural diagram of the outer cover provided in FIG5A at another angle;

FIG6A is a schematic diagram of the structure of the powder inhaler provided in FIG1 with the outer cover removed at an angle;

FIG6B is a schematic structural diagram of the powder inhaler provided in FIG1 with the outer cover removed from another angle;

FIG7A is a schematic structural diagram of the powder inhaler provided in FIG2 at another angle;

Fig. 7B is a partially enlarged schematic diagram of the powder inhaler provided in Fig. 7A;

FIG8A is a schematic diagram of the structure of the powder inhaler provided in FIG1 with the outer cover removed;

FIG8B is a partially enlarged schematic diagram of the powder inhaler provided in FIG8A ;

FIG9A is a cross-sectional schematic diagram of the powder inhaler provided in FIG1 in a state after removing the outer cover;

9B is a cross-sectional schematic diagram of the powder inhaler provided in FIG. 1 in another state after the outer cover is removed;

FIG9C is a cross-sectional schematic diagram of the powder inhaler provided in FIG1 with the outer cover removed in a state at another angle;

FIG9D is a cross-sectional schematic diagram of the powder inhaler provided in FIG1 with the outer cover removed in another state at another angle;

FIG9E is a partial enlarged schematic diagram of area A in FIG9C ;

FIG9F is a partial enlarged schematic diagram of region A in FIG9D ;

FIG9G is a partial enlarged schematic diagram of area B of FIG9C ;

FIG9H is a schematic structural diagram of an L-shaped inlet air duct of the powder inhaler provided in FIG9C ;

FIG10A is a schematic diagram of the structure of the driving cam of the powder inhaler provided in FIG1 at an angle;

FIG10B is a schematic structural diagram of the driving cam provided in FIG10A at another angle;

FIG10C is a schematic diagram of the structure of the driving cam provided in FIG10A at another angle,

FIG11 is a schematic structural diagram of the air bag pressing member of the powder inhaler provided in FIG1 ;

12A is a schematic diagram of the structure of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided in FIG. 1 when it is in a third position in the powder container;

12B is a schematic diagram of the structure of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided in FIG. 1 when it is in the fourth position in the powder container;

FIG13A is a schematic diagram of the structure of a powder container of the powder inhaler provided in FIG1 at an angle;

FIG13B is a schematic structural diagram of the powder container provided in FIG13A at another angle;

FIG14A is a schematic diagram of the structure of the powder metering wheel of the powder inhaler provided in FIG1 at an angle;

FIG14B is a schematic diagram of the structure of the powder metering wheel provided in FIG14A at another angle;

FIG15A is a schematic structural diagram of the inhalation trigger device of the powder inhaler provided in FIG1 when it is in one state on the powder container;

FIG15B is a schematic structural diagram of the inhalation trigger device provided in FIG15A when it is in another state on the powder container;

FIG16A is a schematic diagram of the structure of the inhalation trigger device provided in FIG15A after the powder container is removed;

FIG16B is a schematic diagram of the structure of the inhalation trigger device provided in FIG15B after the powder container is removed;

FIG17A is a schematic structural diagram of the inhalation trigger device provided in FIG16A at another angle;

FIG17B is a schematic structural diagram of the inhalation triggering device provided in FIG16B at another angle;

FIG. 18A is an exploded schematic diagram of the counting mechanism of the powder inhaler provided in FIG. 1 ;

FIG18B is a schematic diagram of the assembly structure of the counting mechanism provided in FIG18A;

FIG19A is a schematic structural diagram of a counter base of the counting mechanism provided in FIG18A at an angle;

FIG19B is a schematic structural diagram of the counter base provided in FIG19A at another angle;

20 is a schematic structural diagram of a dose protection plate of an inhalation trigger device of the powder inhaler provided in FIG. 1 ;

21A is a schematic cross-sectional view of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG. 1 when they are assembled in one state;

21B is a schematic cross-sectional view of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG. 1 in another state;

FIG21C is a partial enlarged schematic diagram of FIG21A;

FIG21D is a partial enlarged schematic diagram of FIG21B ;

21E is a schematic cross-sectional view of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG. 1 in another state;

FIG21F is a partial enlarged schematic diagram of FIG21E;

FIG22A is a schematic structural diagram of an air intake baffle of the inhalation trigger device of the powder inhaler provided in FIG1 at an angle;

FIG22B is a schematic structural diagram of the air intake baffle provided in FIG21A at another angle;

FIG22C is a schematic structural diagram of the air intake baffle provided in FIG22A at another angle;

FIG23A is a schematic diagram of the structure of the front housing of the powder inhaler provided in FIG1 at an angle;

FIG23B is a schematic structural diagram of the front housing of the powder inhaler provided in FIG1 at another angle;

FIG24A is a schematic structural diagram of the units digit wheel of the counting mechanism provided in FIG18A at an angle;

FIG24B is a schematic diagram of the structure of the units digit wheel provided in FIG24A at another angle;

FIG25 is a schematic structural diagram of the tens digit wheel of the counting mechanism provided in FIG18A;

FIG26 is a cross-sectional schematic diagram of another embodiment of the powder inhaler provided by the present application;

27 is a cross-sectional schematic diagram of another embodiment of the powder inhaler provided by the present application;

FIG28 is a schematic diagram of a cycle of the cover opening and closing process of the powder inhaler provided in FIG1 ;

FIG29A is a schematic diagram of a curve of an opening angle and a torque of an embodiment of an opening process of a powder inhaler provided in FIG1 ;

29B is a schematic diagram of a curve of a cover closing angle and a torque in an embodiment of a cover closing process of the powder inhaler provided in FIG. 1 ;

30A is a schematic diagram of a curve of opening angle and torque of another embodiment of the opening process of the powder inhaler provided in FIG. 1 ;

30B is a schematic diagram of a curve of cover closing angle and torque of another embodiment of the cover closing process of the powder inhaler provided in FIG. 1 ;

FIG31A is a schematic diagram of the powder inhaler provided in FIG1 viewed from bottom at an angle;

FIG31B is a schematic diagram of the powder inhaler provided in FIG31A when placed on a horizontal surface;

Fig. 31C is a schematic diagram of the powder inhaler provided in Fig. 31A in a handheld state;

FIG31D is a schematic diagram of the powder inhaler provided in FIG31A after opening the cover in a handheld state;

FIG. 31E is a schematic diagram of the powder inhaler provided in FIG. 31A in the mouth-suction state.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The terms "first", "second", "third" in the embodiments of the present application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

Referring to Figures 1 to 11, Figure 1 is a schematic diagram of the structure of a powder inhaler provided in an embodiment of the present application in an uncapped state, Figure 2 is a schematic diagram of the structure of the powder inhaler provided in Figure 1 in an open-cap state, Figure 3 is a schematic diagram of the structure of the powder inhaler provided in Figure 1 in another open-cap state, Figure 4 is a schematic diagram of the structure of the powder inhaler provided in Figure 3 at another angle, Figure 5A is a schematic diagram of the structure of the outer cover of the powder inhaler provided in Figure 1 at an angle, Figure 5B is a schematic diagram of the structure of the outer cover provided in Figure 5A at another angle, Figure 6A is a schematic diagram of the structure of the powder inhaler provided in Figure 1 after removing the outer cover at an angle, Figure 6B is a schematic diagram of the structure of the powder inhaler provided in Figure 1 after removing the outer cover at another angle, Figure 7A is a schematic diagram of the structure of the powder inhaler provided in Figure 2 at another angle, Figure 7B is a partially enlarged schematic diagram of the powder inhaler provided in Figure 7A, Figure 8A is a schematic diagram of the structure of the powder inhaler provided in Figure 1 after removing the outer cover, Figure 8B is a partially enlarged schematic diagram of the powder inhaler provided in Figure 8A, and Figure 9A is a cross-sectional schematic diagram of the powder inhaler provided in FIG. 1 after removing the outer cover in one state, FIG. 9B is a cross-sectional schematic diagram of the powder inhaler provided in FIG. 1 after removing the outer cover in another state, FIG. 9C is a cross-sectional schematic diagram of another angle of the powder inhaler provided in FIG. 1 after removing the outer cover in one state, FIG. 9D is a cross-sectional schematic diagram of another angle of the powder inhaler provided in FIG. 1 after removing the outer cover in another state, FIG. 9E is a partially enlarged schematic diagram of region A of FIG. 9C, FIG. 9F is a partially enlarged schematic diagram of region A of FIG. 9D, FIG. 9G is a partially enlarged schematic diagram of region B of FIG. 9C, FIG. 9H is a structural schematic diagram of an L-shaped inlet air flow channel of the powder inhaler provided in FIG. 1, FIG. 10A is a structural schematic diagram of a drive cam of the powder inhaler provided in FIG. 1 at one angle, FIG. 10B is a structural schematic diagram of a drive cam provided in FIG. 10A at another angle, FIG. 10C is a structural schematic diagram of a drive cam provided in FIG. 10A at yet another angle, and FIG. 11 is a structural schematic diagram of an air bag pressing piece of the powder inhaler provided in FIG. 1.

Referring to Figures 1 to 4, the present application provides a powder inhaler, which includes a shell assembly (not marked in the figure), a functional mechanism (not shown in Figures 1 to 4) and an outer cover 4; wherein the functional mechanism is arranged in the shell assembly, the outer cover 4 is connected to the shell assembly, and can be limited to rotate back and forth between a first position and a second position, when the outer cover 4 is in the first position, the outer cover 4 is in a closed state, and when the outer cover 4 is in the second position, the outer cover 4 is in an open state. wherein the outer cover 4 cooperates with the functional mechanism, and the linkage action of each functional mechanism is realized by the reciprocating rotation of the outer cover 4 between the first position and the second position, so that the powder inhaler realizes the powder dispensing function such as medicinal powder. The reciprocating rotation of the present application refers to reciprocating along a repeated path, and the directions of the two rotations are opposite, for example, rotating clockwise from the first position to the second position, and then rotating counterclockwise from the second position back to the first position.

Specifically, the shell assembly includes a front shell 1, a rear shell 2 and an upper shell 3. The front shell 1, the rear shell 2 and the upper shell 3 are interconnected and cooperate to form a storage space, and the functional mechanism is arranged in the storage space. The outer cover 4 is rotatably connected to the bottom end of the shell assembly, so that it can rotate back and forth between the first position and the second position to realize the opening and closing process. The outer cover 4 can be rotatably connected to the bottom end of the shell assembly by a rotating shaft or by an arc-shaped slide rail. The shape and structure of the front shell 1, the rear shell 2, the upper shell 3 and the outer cover 4 are not limited, and the material can be metal or plastic.

1, 5A to 9B, the outer cover 4 includes two connecting parts 406 arranged opposite to each other along a first direction, and the two connecting parts 406 are respectively rotatably connected to the opposite sides of the bottom end of the shell assembly and protrude from the bottom end of the shell assembly. Specifically, the two connecting parts 406 of the outer cover 4 are assembled and connected with the shell assembly by matching the rotating shaft with the hole. 5A, 5B, 6A, 8A, 8B, 9A, and 9B, the powder inhaler further comprises a driving gear 5, which is disposed in the housing assembly, and a driving shaft 501 is disposed on one end face of the driving gear 5, a first axial hole 401 and a driving hole 402 are disposed on one of the connecting portions 406 of the outer cover 4, a second axial hole 404 is disposed on the other connecting portion 406 of the outer cover 4, and cylinders 105 are disposed on the front housing 1 corresponding to the first axial hole 401 and the second axial hole 404, respectively, and the cylinder 105 is defined as a first cylinder, the first axial hole 401 and the second axial hole 404 of the outer cover 4 cooperate with the corresponding cylinder 105 of the front housing 1, and the driving hole 402 of the outer cover 4 cooperates with the driving shaft 501 of the driving gear 5, so that the outer cover 4 is rotatably connected to the bottom end of the housing assembly.

As shown in FIG. 6B , the powder inhaler further includes a sealing ring 6, which is disposed between the connecting portion 406 of the outer cover 4 and the driving gear 5 for sealing, thereby ensuring the consistency of the airway and the consistency of the suction resistance of the powder inhaler, and preventing gas from entering the housing assembly from between the driving gear 5 and the connecting portion 406 of the outer cover 4.

Referring to Fig. 5A, Fig. 6A, Fig. 7A and Fig. 7B, an arc rib 405 is further provided on one of the connecting parts 406 of the outer cover 4, and a sound spring arm 108 is provided on the front shell 1. The arc rib 405 on the outer cover 4 is used to cooperate with the sound spring arm 108 on the front shell 1, and when the outer cover 4 rotates from the first position to the second position, a sound prompt of the cover being opened in place is realized. Specifically, during the process of opening the outer cover 4, that is, during the process of the outer cover 4 rotating from the first position to the second position, the sound spring arm 108 is located on the outside of the arc rib 405, and the sound spring arm 108 moves along the periphery of the arc rib 405. After the outer cover 4 is opened in place, that is, when it rotates to the second position, the sound spring arm 108 cooperates with the arc rib 405 to realize a sound prompt of the cover being opened in place. During the closing process of the outer cover 4, that is, during the process of the outer cover 4 rotating from the second position to the first position, the outer cover 4 is located on the inner side of the arc rib 405, and the outer cover 4 moves along the inner circumference of the arc rib 405. After the outer cover 4 is closed, that is, when it rotates to the first position, the sound spring arm 108 cooperates with the arc rib 405 to realize the sound prompt of the closed cover in place. For example, in a preferred embodiment, the angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the second position relative to the first position is 150 degrees; during the opening process, when the outer cover 4 rotates from 0 degrees to 150 degrees, that is, when the rotation angle of the outer cover 4 is 150 degrees, the arc rib 405 of the outer cover 4 contacts the sound spring arm 108 of the front shell 1, and the sound prompt function of the opened cover in place is realized. The angle of the outer cover 4 in the second position is not limited to 150 degrees, and can be designed as needed, for example, it can be greater than or equal to 120 degrees and less than or equal to 180 degrees, as long as the outer cover 4 can expose the suction nozzle 101 when it is in the second position.

6A and 12A to 13B, the powder inhaler has an inhalation channel 706 and a mouthpiece 101, and the mouthpiece 101 is connected to the inhalation channel 706, so that the user can inhale the powder from the outlet 102 of the mouthpiece 101. Specifically, the housing assembly includes the mouthpiece 101, which is arranged on the front housing 1 and sleeved on the inhalation channel 706. When the outer cover 4 is configured to the first position, the outer cover 4 blocks the outlet 102 of the mouthpiece 101, and when the outer cover 4 is configured to the second position, the outlet 102 of the mouthpiece 101 is exposed.

Specifically, as shown in FIG. 5A , two drive holes 402 are provided on the connection portion 406 of the outer cover 4, and the two drive holes 402 are respectively provided on both sides of the first shaft hole 401. Two drive shafts 501 are provided on one end surface of the drive gear 5, and the two drive shafts 501 are respectively provided on both sides of the cylinder 105 of the front housing 1. The two drive holes 402 are matched and connected with the two drive shafts 501 in a one-to-one correspondence. In other embodiments, the drive holes 402 and the drive shafts 501 can also be correspondingly provided to one, three or other numbers. It can be understood that the connection between the outer cover 4 and the drive gear 5 is not limited to the above-mentioned method, and can also be integrally formed, glued or welded, as long as the rotation of the outer cover 4 can drive the drive gear 5 to rotate.

As shown in FIG9A , the powder inhaler further includes an intermediate gear 13, which is disposed in the housing assembly and meshes with the driving gear 5. The outer cover 4 drives the driving gear 5 and the functional mechanism to be linked by the outer cover 4 through the matching connection with the driving gear 5. Specifically, the outer cover 4 rotates around the cylinder 105 of the front housing 1, and the driving hole 402 of the outer cover 4 drives the driving gear 5 to rotate synchronously, and then the linkage of each functional mechanism is realized through the driving of the intermediate gear 13.

The functional mechanism includes an air compression mechanism, a powder delivery mechanism, an inhalation trigger mechanism, and a counting mechanism. The rotation of the outer cover 4 during the opening process drives the air compression mechanism to realize the air compression function, and after the air compression is completed, drives the powder delivery mechanism to realize the powder delivery function, so as to deliver powders such as medicinal powder to the inhalation channel 706 of the powder inhaler, and realizes the inhalation trigger function through the inhalation trigger mechanism, so that the user can inhale the medicinal powder. Further, the outer cover 4 is closed, driving the air compression mechanism, the powder delivery mechanism, and the inhalation trigger mechanism to reset, and driving the counting mechanism to count.

The various functional units are introduced below.

(1) Air compression mechanism

Referring to Figures 12A to 14B, Figure 12A is a structural schematic diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided in Figure 1 when it is in the third position in the powder container, Figure 12B is a structural schematic diagram of the powder metering wheel of the powder delivery mechanism of the powder inhaler provided in Figure 1 when it is in the fourth position in the powder container, Figure 13A is a structural schematic diagram of the powder container of the powder inhaler provided in Figure 1 at one angle, Figure 13B is a structural schematic diagram of the powder container provided in Figure 13A at another angle, Figure 14A is a structural schematic diagram of the powder metering wheel of the powder inhaler provided in Figure 1 at one angle, and Figure 14B is a structural schematic diagram of the powder metering wheel provided in 14A at another angle.

5A to 14B, specifically, the air compression mechanism includes an airbag pressing piece 17, an air compression airbag 18, an elastic piece 19 and a driving cam 12. In order to facilitate understanding of the function of the air compression mechanism, the powder delivery mechanism is introduced here. The powder delivery mechanism includes a powder container 7 and a powder metering wheel 9. The powder metering wheel 9 has a dosage cup 902. The powder container 7 has a storage cavity 715. The storage cavity 715 is used to store powder. One end of the elastic piece 19 acts on the airbag pressing piece 17. The airbag pressing piece 17 is used to squeeze the air compression airbag 18 under the drive of the elastic piece 19, so that the air compression airbag 18 is compressed to achieve the air compression function; the airbag pressing piece 17 is also used to squeeze the elastic piece 19 under the action of the driving cam 12, and drive the air compression airbag 18 to stretch.

Referring to FIGS. 12A to 13B , specifically, the first end of the storage cavity 715 has a powder outlet 713, and the second end has a compressed air port 714. The compressed air bag 18 is disposed at the second end of the storage cavity 715 and communicates with the compressed air port 714. Specifically, the outer side surface of the second end of the storage cavity 715 has an annular convex rib 701. One end of the compressed air bag 18 close to the powder container 7 is engaged with the annular convex rib 701 of the powder container 7 to achieve the connection between the compressed air bag 18 and the powder container 7. The air bag pressing member 17 is movably sleeved on the outer side of the compressed air bag 18 and the storage cavity 715. The elastic member 19 may be an elastic structural member such as a spring. The air bag pressing member 17 is used to squeeze the compressed air bag 18 under the drive of the elastic member 19. Among them, the airbag pressure piece 17 can move back and forth between the fifth position and the sixth position, so that the compressed airbag 18 pressurizes air into the storage chamber 715 to realize the air compression function, which is convenient for squeezing the powder in the storage chamber 715 from the powder outlet 713 into the dosage cup 902 of the powder metering wheel 9.

As shown in Fig. 9A, Fig. 9B, Fig. 11, Fig. 13A and Fig. 13B, the top wall of the airbag pressing piece 17 has a fixing hole 1701, and the fixing hole 1701 is used to connect the top of the compressed airbag 18. For example, the top of the compressed airbag 18 can pass through the fixing hole 1701, and part of the compressed airbag 18 is limited outside the top wall of the airbag pressing piece 17, and the other part is limited to the top wall of the airbag pressing piece 17 near the compressed air port 714, so that the compressed airbag 18 can be driven to expand and contract through the movement of the airbag pressing piece 17 and the cooperation of the elastic piece 19. The compressed airbag 18 is driven to expand and contract by the airbag pressing piece 17, which can improve the compression efficiency of the compressed airbag 18 and avoid the compressed airbag 18 from being unable to reset due to air, causing the compressed airbag 18 to work abnormally.

Powder inhaler also comprises drive cam 12, and drive cam 12 is arranged in the housing assembly, specifically, refer to Fig. 9A, powder inhaler also comprises gear support 14, and gear support 14 is arranged in the housing assembly, and drive cam 12 is assembled on gear support 14, and one end of gear support 14 is assembled and connected with powder metering wheel 9, and the other end is assembled and connected with drive cam 12. Outer cover 4 drives drive gear 5 linkage, and drive gear 5 is meshed with intermediate gear 13, and intermediate gear 13 is meshed with drive cam 12, and realizes drive cam 12 and drive gear 5 to rotate in the same direction. It is understandable that the application can also omit drive gear 5 and/or intermediate gear 13, as long as can drive cam 12 to rotate by outer cover 4 rotation. Drive cam 12 and elastic member 19 are used to drive air bag pressing piece 17 to move back and forth between the fifth position and the sixth position, thereby drive compressed air bag 18 to expand and contract, to realize compressed air and reset function. Specifically, the elastic member 19 is arranged on one side of the top wall of the airbag pressure piece 17, one end of the elastic member 19 abuts against the top wall of the airbag pressure piece 17, and the other end abuts against the top wall of the upper shell 3 to drive the airbag pressure piece 17 to move; the driving cam 12 rotates to make way for the airbag pressure piece 17, and the elastic member 19 drives the airbag pressure piece 17 to move from the fifth position to the sixth position; the driving cam 12 squeezes the airbag pressure piece 17, and the airbag pressure piece 17 resets and moves from the sixth position to the fifth position and squeezes the elastic member 19.

Referring to FIG. 10A to FIG. 11 , the side wall of the airbag pressing piece 17 has a protruding rod 1704 at one end away from the top wall, and the protruding rod 1704 has a curved surface 1703 at one end away from the top wall of the airbag pressing piece 17. The driving cam 12 has a cam curved surface 1202. The curved surface 1703 is used to cooperate with the cam curved surface 1202 of the driving cam 12 to realize the reciprocating movement of the airbag pressing piece 17 between the fifth position and the sixth position. Specifically, when the airbag pressing piece 17 is in the fifth position, the curved surface 1703 of the protruding rod 1704 of the airbag pressing piece 17 abuts against the side surface of the driving cam 12, and the curved surface 1703 of the airbag pressing piece 17 is limited in the arc groove 1201 of the driving cam 12. At this time, the top wall of the airbag pressing piece 17 compresses the elastic member 19 to make it in a compressed state, and the top wall of the airbag pressing piece 17 stretches the compressed airbag 18 to make it in an extended state. During the opening process of the outer cover 4, the driving cam 12 is driven to rotate, the elastic member 19 is continuously stretched, and the elastic force of the elastic member 19 drives the airbag pressure member 17 to move vertically downward, that is, the elastic member 19 drives the airbag pressure member 17 to move from the fifth position to the sixth position, and the arc surface 1703 of the airbag pressure member 17 moves along the cam surface 1202 of the driving cam 12. The airbag pressure member 17 moves downward to compress the compressed airbag 18 and pressurize air into the storage chamber 715.

In one embodiment, the ratio of the number of teeth between the driving gear 5 and the driving cam 12 is 18:15, that is, when the outer cover 4 is opened 150°, the driving gear 5 rotates synchronously 150°, and at this time, the rotation angle of the driving cam 12 is 180°. It can be understood that setting the ratio of the number of teeth between the driving gear 5 and the driving cam 12 to 18:15 can reduce the volume of the driving gear 5 and save space. In other embodiments, the powder inhaler may not be provided with the driving gear 5 and the intermediate gear 13, and the outer cover 4 is directly linked with the driving cam 12, and the driving cam 12 is driven to rotate by the rotation of the outer cover 4, thereby realizing the linkage of the functional mechanism.

Specifically, as shown in FIG. 9A to FIG. 11 , the driving cam 12 includes a body 1200 and a gear 1203. The gear 1203 is coaxially connected to the body 1200 and is used to drive the body 1200 to rotate. The gear 1203 is meshed with the intermediate gear 13. Among them, a surface of the body 1200 has a guide groove 1209, and the side of the guide groove 1209 is a cam curved surface 1202. The cam curved surface 1202 cooperates with the arc surface 1703 of the airbag pressing piece 17 to realize the reciprocating movement of the airbag pressing piece 17 between the fifth position and the sixth position. Specifically, the driving cam 12 has a center hole 1204, which is defined as a first center hole. The gear 1203 is disposed on a surface of the body 1200 and is disposed around the center hole 1204. The center hole 1204 passes through the body 1200 and the gear 1203. The center hole 1204 of the driving cam 12 is sleeved on the gear bracket 14 of the powder inhaler. The guide groove 1209 is located on the surface of the main body 1200 facing the gear 1203, and the guide groove 1209 is spaced apart from the gear 1203. The airbag pressure piece 17 moves up and down between the fifth position and the sixth position along the longitudinal direction. The present application simplifies the structure of the air compression mechanism and improves the stability of the operation of the air compression mechanism by directly abutting the cam surface 1202 of the driving cam 12 against the convex rod 1704 of the airbag pressure piece 17. In one embodiment, the air compression mechanism includes only four independent components: the airbag pressure piece 17, the air compression airbag 18, the elastic member 19 and the driving cam 12, so that the air compression mechanism has a simple structure.

In some embodiments, the protruding rod 1704 of the airbag pressure piece 17 has a pointed end away from the top wall, and the end face of the pointed end is an arc surface 1703. The outer peripheral side surface of the main body 1200 of the driving cam 12 has an arc-shaped groove 1201. When the airbag pressure piece 17 is configured to the fifth position, the tip of the protruding rod 1704 is embedded in the arc-shaped groove 1201 of the main body 1200 to achieve initial positioning and preliminary limiting of the airbag pressure piece 17.

In a specific embodiment, the arc groove 1201 is an arc groove, the bottom surface of the arc groove 1201 is an arc shape, and the arc surface 1703 of the convex rod 1704 is an arc surface. It can be understood that the arc groove 1201 is provided on the cam curved surface 1202 of the driving cam 12, and the arc surface 1703 of the convex rod 1704 is embedded in the arc groove 1201 to initially position and initially limit the airbag pressing piece 17, so that the movement of the air compression mechanism needs to overcome the resistance of the arc surface 1703 of the airbag pressing piece 17 to move upward from the arc groove 1201, which can effectively prevent the air compression mechanism from being triggered by mistake.

In one embodiment, the bottom surface of the arc groove 1201 is arc-shaped, and the arc surface 1703 of the protruding rod 1704 is an arc surface. During the process of the arc surface 1703 of the protruding rod 1704 moving from one side to the other side of the bottom surface of the arc groove 1201, the protruding rod 1704 does not move, and the outer cover 4 rotates to an idle stroke.

Further, referring to Figures 9A to 13B, the side wall of the storage cavity 715 of the powder container 7 has a vent hole 709, and the side wall of the airbag press piece 17 has a pressure relief hole 1702. As shown in Figures 9C and 9E, when the airbag press piece 17 is configured to the fifth position, the side wall of the airbag press piece 17 blocks the vent hole 709, and the vent hole 709 is not connected to the pressure relief hole 1702; as shown in Figures 9D and 9F, when the airbag press piece 17 is configured to the sixth position, the pressure relief hole 1702 is connected to the vent hole 709. During the movement of the airbag press piece 17 from the fifth position to the sixth position, air is first compressed into the storage cavity 715 through the compressed airbag 18, so as to fill and compact the powder in the storage cavity 715 into the dosage cup 902 of the powder metering wheel 9 through the powder outlet 713, so as to improve the consistency of powder filling. After the pressure relief hole 1702 is connected with the vent hole 709, the pressure in the storage chamber 715 is relieved to release the pressure in the storage chamber 715 of the powder container 7 to normal pressure, so as to avoid excessive pressure in the storage chamber 715 due to the lack of pressure relief in the subsequent powder delivery process, thereby causing the powder to leak from the gap when the powder metering wheel 9 of the powder delivery mechanism rotates, thereby reducing powder waste. That is, when the airbag pressure piece 17 moves from the fifth position to the sixth position, the air compression process is first performed, and then the pressure relief process is performed, and the pressure relief process is performed in the later stage of the downward stroke of the airbag pressure piece 17. Since the pressure relief process of the storage chamber 715 in the present application is completed before the powder metering wheel 9 rotates from the third position to the fourth position, less powder will leak from the powder outlet 713 under air pressure after the powder metering wheel 9 starts to rotate from the third position to the fourth position.

Specifically, referring to FIG. 9C and FIG. 9D , in some embodiments, a filter membrane 25 is disposed at the second end of the storage cavity 715. The filter membrane 25 is located at the compressed air port 714 and is spaced apart from the port of the compressed air port 714 to isolate the space of the compressed air bag 18 from the internal space of the storage cavity 715. The filter membrane 25 may be a waterproof and breathable membrane, which may filter impurities in powders such as medicinal powders, and may also filter water vapor, etc., to prevent the powder in the storage cavity 715 from getting damp. The vent 709 is disposed on the side wall of the storage cavity 715, and one end of the vent 709 is connected to the space between the filter membrane 25 and the compressed air bag 18, that is, the vent 709 is not directly connected to the interior of the storage cavity 715, and is relatively independent of the interior of the storage cavity 715. After the vent hole 709 is connected to the pressure relief hole 1702, the gas in the space between the filter membrane 25 and the compressed air bag 18 can be discharged through the vent hole 709 and the pressure relief hole 1702 in sequence, thereby relieving the pressure of the space between the filter membrane 25 and the compressed air bag 18. At the same time, since the filter membrane 25 is a breathable membrane, the gas in the storage cavity 715 can also pass through the filter membrane 25 and enter the space between the filter membrane 25 and the compressed air bag 18, and then be discharged from the vent hole 709 to relieve the pressure of the storage cavity 715, thereby preventing the vent hole 709 from being directly connected to the inside of the storage cavity 715, and preventing the gas in the storage cavity 715 from directly leaking from the vent hole 709 during the pressure relief process, causing the powder in the storage cavity 715 to fly or leak. During the extension of the compressed air bag 18, i.e., during the inhalation of the compressed air bag 18, external air enters the space between the filter membrane 25 and the compressed air bag 18 from the vent hole 709, and then enters the storage cavity 715 through the filter membrane 25, preventing the vent hole 709 from being directly connected to the inside of the storage cavity 715. During the inhalation of the compressed air bag 18, external air directly enters the storage cavity 715 from the vent hole 709, bringing external water molecules into the storage cavity 715, causing the medicine powder in the storage cavity 715 to fly or become wet, etc., causing waste. In addition, the filter membrane 25 can also prevent the medicine powder from entering the compressed air bag 18 from the storage cavity 715, causing the problem of medicine powder waste.

Referring to FIG. 13A , the side wall of the storage cavity 715 of the powder container 7 is further provided with a receiving cavity 702, and the receiving cavity 702 is used to store a desiccant. The storage cavity 715 and the receiving cavity 702 have a common side wall, and the common side wall can be made of a water-permeable material, so that the desiccant in the receiving cavity 702 can absorb the water vapor in the storage cavity 715 to prevent the powder in the storage cavity 715 from getting damp.

In a preferred embodiment, the downward stroke of the airbag pressing piece 17 is within the range of 2mm-6mm during the movement of the airbag pressing piece 17 from the fifth position to the sixth position. For example, in a specific embodiment, the downward stroke of the airbag pressing piece 17 is 3.5mm, wherein the first 3mm downward stroke is the air compression stroke, and the last 0.5mm downward stroke is the pressure relief stroke. When the downward stroke of the airbag pressing piece 17 reaches 3mm, the pressure relief hole 1702 and the vent hole 709 are at a critical point of connection. When the downward stroke of the airbag pressing piece 17 is between 3mm-3.5mm, the pressure relief hole 1702 and the vent hole 709 are connected to achieve pressure relief. The angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the outer cover 4 in the second position is 150 degrees. When the downward pressure stroke of the airbag pressure piece 17 of the air compression mechanism is 3.5 mm, that is, when the airbag pressure piece 17 is in the sixth position, the angle of the outer cover 4 is 62.5 degrees, which drives the rotation angle of the drive gear 5 to be 62.5 degrees, and the corresponding rotation angle of the drive cam 12 is 75 degrees.

More preferably, during the opening process, when the rotation angle of the outer cover 4 is 55 degrees, the downward stroke of the airbag pressing member 17 reaches 3 mm, and the air compression mechanism completes the process of compressing and discharging the powder in the powder container 7, i.e., the air compression process. When the rotation angle of the outer cover 4 is 62.5 degrees, the pressure relief process is completed, and the compressed gas in the powder container 7 is released to normal pressure, thereby avoiding powder leakage when the powder metering wheel 9 rotates. It can be understood that the selection of the above angles is only an example, and other angle ranges can also be selected.

10A to 10C , in some embodiments, the cam surface 1202 includes a first curved surface segment 1211 and a second curved surface segment 1212 connected to each other, and the second curved surface segment 1212 is located at an end of the first curved surface segment 1211 away from the arc groove 1201. The first curved surface segment 1211 is a non-arc surface, the second curved surface segment 1212 is an arc surface, and the second curved surface segment 1212 is concentrically arranged with the outer peripheral side surface of the body portion 1200.

It can be understood that the first curved surface segment 1211 is set as a non-arc surface. During the closing process of the outer cover 4 of the powder inhaler, the driving cam 12 rotates in the opposite direction, and the rotation of the first curved surface segment 1211 drives the airbag pressing piece 17 to reset from the sixth position to the fifth position. Specifically, during the process of resetting the airbag pressing piece 17 from the sixth position to the fifth position, the curved surface 1703 of the convex rod 1704 of the airbag pressing piece 17 abuts against the first curved surface segment 1211. The first curved surface segment 1211 is a non-arc surface. The reverse rotation of the first curved surface segment 1211 pushes the convex rod 1704 of the airbag pressing piece 17 to continuously move upward, thereby realizing the resetting of the airbag pressing piece 17.

Preferably, the first curved surface segment 1211 includes a first curved surface segment 1214, a plane segment 1215 and a second curved surface segment 1216 connected to each other, the plane segment 1215 is located between the first curved surface segment 1214 and the second curved surface segment 1216, and the plane segment 1215 is located at an end of the first curved surface segment 1214 away from the arc groove 1201. In the process of opening the outer cover 4, when the airbag pressing piece 17 moves from the fifth position to the sixth position, the resistance of the side wall of the arc groove 1201 close to the first curved surface segment 1214 to the curved surface 1703 of the protruding rod 1704 must be overcome first, so that the tip of the protruding rod 1704 is separated from the arc groove 1201. This process is an empty stroke of opening the cover, which requires a large torque to prevent the cover from being opened by mistake.

In one embodiment, the angle of the outer cover 4 in the first position is defined as 0 degrees, the angle of the outer cover 4 in the second position is 150 degrees, and the process of the outer cover 4 rotating from 0 degrees to 12 degrees is the lid opening idle stroke, wherein the process of the outer cover 4 rotating from 0 degrees to 8 degrees is the first lid opening idle stroke, and the process of the outer cover 4 rotating from 8 degrees to 12 degrees is the second lid opening idle stroke. In the first lid opening idle stroke, the outer cover 4 rotates so that the arc surface 1703 at the tip of the convex rod 1704 abuts from the end of the arc groove 1201 away from the first arc surface segment 1214 to the end of the arc groove 1201 close to the first arc surface segment 1214, that is, the arc surface 1703 at the tip of the convex rod 1704 passes through the bottom surface of the arc groove 1201. Preferably, the torque in this process is 0.05N·m, which can effectively prevent the lid from being opened by mistake due to non-human factors. In the second lid opening idle stroke, the outer cover 4 rotates so that the arc surface 1703 at the tip of the protruding rod 1704 moves from abutting against the end of the arc groove 1201 close to the first arc surface segment 1214 to abutting against the first arc surface segment 1214, that is, the arc surface 1703 at the tip of the protruding rod 1704 needs to be disengaged from the arc groove 1201, which requires a greater torque than the first lid opening idle stroke. Preferably, the torque in the second lid opening idle stroke is 0.15 N·m. Setting a greater lid opening resistance can more effectively prevent accidental lid opening.

During the opening process of the outer cover 4, when the outer cover 4 rotates to 12 degrees, the arc surface 1703 at the tip of the protruding rod 1704 of the airbag pressing piece 17 disengages from the arc groove 1201 and abuts against the first arc surface segment 1214, and the opening idle stroke of the outer cover 4 is completed. Thereafter, during the process of the outer cover 4 rotating from 12 degrees to 62.5 degrees, the air compression mechanism performs the air compression process and the pressure relief process. At this time, the outer cover 4 performs the first opening lid load stroke.

Since the arc surface 1703 at the tip of the protruding rod 1704 has been disengaged from the arc groove 1201 when the outer cover 4 rotates to 12 degrees, the outer cover 4 will open instantly and rotate instantly from 12 degrees to 55 degrees, driving the driving cam 12 to rotate instantly to 66 degrees. At this time, the protruding rod 1704 of the airbag pressing piece 17 will also move downward instantly, and the arc surface 1703 at the tip of the protruding rod 1704 will instantly move to abut against the end of the plane segment 1215 close to the second arc surface segment 1216. The downward pressing stroke of the protruding rod 1704 of the airbag pressing piece 17 reaches 3mm, and the air compression mechanism realizes the function of instantaneous air compression. When the outer cover 4 rotates to 55 degrees, the pressure relief hole 1702 and the vent hole 709 are at the critical point of connection. During the process of the outer cover 4 rotating from 55 degrees to 62.5 degrees, the driving cam 12 rotates from 66 degrees to 75 degrees, and the tip of the convex rod 1704 of the airbag pressing piece 17 abuts from the end of the second arc surface segment 1216 close to the plane segment 1215 to the end of the second arc surface segment 1216 away from the plane segment 1215, that is, the tip of the convex rod 1704 slides over the second arc surface segment 1216. During this process, the downward pressing stroke of the convex rod 1704 of the airbag pressing piece 17 is between 3mm-3.5mm, and the pressure relief hole 1702 and the vent hole 709 are connected to achieve pressure relief. The torque of the outer cover 4 in the first opening load stroke is constant. Preferably, the torque of the outer cover 4 in the first opening load stroke is 0N·m, that is, the torque of the outer cover 4 in the process of rotating from 12 degrees to 62.5 degrees is 0N·m, which is conducive to the instantaneous opening of the outer cover 4, so that the air compression mechanism can quickly and instantly compress air and improve the air compression effect.

When the outer cover 4 rotates to 62.5 degrees, the arc surface 1703 of the tip of the protruding rod 1704 of the airbag pressure piece 17 is at the critical point between the first curved surface segment 1211 and the second curved surface segment 1212. When the outer cover 4 continues to rotate from 62.5 degrees to 150 degrees, the driving cam 12 rotates from 75 degrees to 180 degrees, and the arc surface 1703 of the protruding rod 1704 of the airbag pressure piece 17 abuts from one end of the second curved surface segment 1212 close to the first curved surface segment 1211 to the end of the second curved surface segment 1212 away from the first curved surface segment 1211. Since the second curved surface segment 1212 is an arc surface, and the second curved surface segment 1212 is concentrically arranged with the outer peripheral side surface of the main body 1200 and the pitch circle of the gear 1203, when the outer cover 4 rotates from 62.5 degrees to 150 degrees, the protruding rod 1704 of the airbag pressure piece 17 is still in the sixth position, that is, at 3.5 mm, and the protruding rod 1704 of the airbag pressure piece 17 will not move.

Referring to FIGS. 1 to 11 , a stop groove 1213 is provided at one end of the second curved surface section 1212 of the driving cam 12 away from the first curved surface section 1211. After the outer cover 4 is opened, the tip of the convex rod 1704 of the airbag pressing piece 17 is in the stop groove 1213, and the driving cam 12 is acted on by the gravity of the airbag pressing piece 17, so that the tip of the convex rod 1704 of the airbag pressing piece 17 limits the driving cam 12, preventing the driving cam 12 from rotating in the opposite direction under the action of the reset torsion spring 15 (as shown in FIG. 17A ) after the user lets go after the cover is opened, resulting in the problem of the outer cover automatically closing after the cover is opened. In a specific embodiment, the stop groove 1213 is an arc-shaped groove, and the bottom surface of the stop groove 1213 is an arc-shaped groove, so that the tip of the convex rod 1704 and the stop groove 1213 can achieve better matching.

(2) Powder delivery mechanism

Referring to FIGS. 12A to 14B , the powder delivery mechanism includes a powder container 7 and a powder metering wheel 9, and the powder metering wheel 9 of the powder delivery mechanism is rotatably connected to the powder container 7. Specifically, the powder container 7 has a storage chamber 715, an inhalation channel 706, and a first cylindrical groove 716. The powder metering wheel 9 is installed in the first cylindrical groove 716, and the powder metering wheel 9 can rotate back and forth between a third position and a fourth position. In the third position, the dosage cup 902 of the powder metering wheel 9 is in a powder filling position, and in the fourth position, the dosage cup 902 of the powder metering wheel 9 is in a powder inhalation position, i.e., a position corresponding to the inhalation channel 706. It should be noted that the powder metering wheel 9 of the present application rotates back and forth between the third position and the fourth position, and its reciprocating rotation path is all carried out along the minor arc, i.e., the direction of rotation of the powder metering wheel 9 from the third position to the fourth position is opposite to the direction of rotation from the fourth position to the third position, and the reciprocating rotation between the third position and the fourth position is not achieved by performing a full rotational motion along the inner circumference of the first cylindrical groove 716. By rotating the powder metering wheel 9 back and forth between the third position and the fourth position along the minor arc, the movement path of the powder metering wheel 9 can be made shortest and move along the optimal path, thereby more effectively avoiding the waste and loss of the powder in the dosage cup 902 during the movement of the powder metering wheel 9.

The powder metering wheel 9 includes a dosage cup 902, wherein when the powder metering wheel 9 is configured to the third position, the dosage cup 902 is arranged corresponding to the powder outlet 713 of the storage cavity 715, for receiving the powder from the powder container 7, and when the powder metering wheel 9 is configured to the fourth position, the dosage cup 902 is arranged corresponding to the inlet 704 of the inhalation channel 706. Specifically, when the airbag pressing member 17 moves from the fifth position to the sixth position, the powder metering wheel 9 is in the third position, and the airbag pressing member 17 acts on the compressed airbag 18 under the drive of the elastic member 19, and fills and compacts the powder in the storage cavity 715 into the dosage cup 902 of the powder metering wheel 9.

13A, 14A and 14B, specifically, the powder metering wheel 9 is installed in the first cylindrical groove 716, and the powder metering wheel 9 has an outer arc surface 901, and the outer arc surface 901 of the powder metering wheel 9 is arranged in contact with the inner arc surface 705 of the first cylindrical groove 716 of the powder container 7. The outer arc surface 901 of the powder metering wheel 9 is an arc annular surface covering the reciprocating stroke, and the arc corresponding to the arc of the outer arc surface 901 is greater than or equal to 140 degrees and less than or equal to 170 degrees. Preferably, the arc corresponding to the arc of the outer arc surface 901 is about 150 degrees.

Referring to Figures 13A and 14B, the first cylindrical groove 716 of the powder container 7 has a cylinder 703, and the cylinder 703 is defined as the second cylinder. The powder metering wheel 9 has a center hole 906, and the center hole 906 is defined as the second center hole. The first end of the powder metering wheel 9 has a tightening spring arm 909, and the tightening spring arm 909 is defined as the first tightening spring arm. The tightening spring arm 909 is arranged outside the center hole 906. The tightening spring arm 909 of the powder metering wheel 9 is arranged in cooperation with the cylinder 703 in the first cylindrical groove 716 of the powder container 7. Specifically, the cylinder 703 in the first cylindrical groove 716 is assembled in the center hole 906, and the tightening spring arm 909 abuts against the cylinder 703 in the first cylindrical groove 716. The inner diameter formed by the tightening spring arm 909 is smaller than the outer diameter of the cylinder 703. Therefore, during assembly, the tightening spring arm 909 is elastically deformed. The elastic deformation of the tightening spring arm 909 of the powder metering wheel 9 provides a pressing force for the inner arc surface 705 of the first cylindrical groove 716 to fit with the outer arc surface 901 of the powder metering wheel 9, thereby improving the sealing reliability and making the powder metering wheel 9 more tightly assembled in the first cylindrical groove 716 of the powder container 7, so as to facilitate a good assembly connection between the powder metering wheel 9 and the powder container 7.

The outer side of the powder metering wheel 9 is provided with a dosage cup 902. Specifically, the dosage cup 902 is provided on the outer arc surface 901 of the powder metering wheel 9, and the dosage cup 902 is used to contain powder. In a preferred embodiment, only one dosage cup 902 is provided on the outer arc surface 901 of the powder metering wheel 9, and only by the reciprocating rotation of the powder metering wheel 9 between the third position and the fourth position, the dosage cup 902 is driven to reciprocate between the inlet 704 position of the inhalation channel 706 and the powder outlet 713 position to achieve powder filling and delivery, thereby facilitating the user's inhalation.

It can be understood that the amount of powder contained in a dosage cup 902 is fixed, and the amount of powder entering the inhalation channel 706 when the user inhales is fixed, which avoids the possibility of excessive powder such as medicine powder by setting multiple dosage cups 902 at intervals along the circumferential direction on the outer surface of the cylindrical metering component, allowing multiple doses to be continuously distributed into the inhalation channel 706 when the metering component rotates, or when a series of dosage grooves or one dosage groove is opened on the surface of the flat metering component, when the powder is delivered by translation, the position state used for inhalation is inconsistent with the open position state of the outer cover 4, resulting in the user inhaling multiple doses of powder through one inhalation, thereby causing the user to inhale excessive powder. That is, only one dosage cup 902 is set on the outer arc surface 901 of the powder metering wheel 9, and the amount of powder inhaled by the user at the outlet 102 of the suction nozzle 101 is fixed, and there is no possibility of inhaling multiple doses of powder, which can accurately control the powder inhalation amount and simplify the structure.

In other embodiments, a dosage cup 902 disposed on the outer arc surface 901 of the powder metering wheel 9 may also include a plurality of sub-dose cups, that is, at one position, a dosage cup 902 may be divided into a plurality of mutually spaced sub-dose cups. For example, one or more partitions may be disposed in the dosage cup 902 to divide a dosage cup 902 into a plurality of sub-dose cups. Alternatively, in other embodiments, a plurality of dosage cups 902 may be spaced apart on the outer arc surface 901 of the powder metering wheel 9, as long as the powder holding capacity in the dosage cup 902 is fixed at a fixed position, the amount of powder inhaled by the user can be precisely controlled.

Referring to FIG. 14A , in one embodiment, a first scraping powder groove 903 is further provided on the outer arc surface 901 of the powder metering wheel 9. The first scraping powder groove 903 is a notch provided on the outer arc surface 901. Specifically, the first scraping powder groove 903 is inclined to the circumferential direction of the powder metering wheel 9. The first scraping powder groove 903 is used to scrape off and discharge the fine powder attached to the inner arc surface 705 of the powder container 7, so as to prevent the fine powder on the inner arc surface 705 of the powder container 7 from blocking the movement of the powder metering wheel 9, and to improve the smoothness of the movement of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. Preferably, the depth of the first scraping powder groove 903 is 0.2 mm-0.4 mm.

In one embodiment, a second scraping powder groove 904 is further provided on the outer arc surface 901 of the powder metering wheel 9, the depth of the second scraping powder groove 904 is greater than the depth of the first scraping powder groove 903, preferably, the depth of the second scraping powder groove 904 is 0.7mm-0.9mm, and the second scraping powder groove 904 is used to scrape and discharge large-particle powder attached to the inner arc surface 705 of the powder container 7, so as to further improve the smoothness of the movement of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. In some embodiments, the width of the second scraping powder groove 904 may also be greater than the width of the first scraping powder groove 903. Among them, along the direction of the powder metering wheel 9 turning from the third position to the fourth position, the second powder scraping groove 904 is arranged on the side of the first powder scraping groove 903 away from the dosage cup 902, so that in the process of the powder metering wheel 9 turning from the third position to the fourth position, that is, in the dosing stroke of the powder metering wheel 9, the large-particle powder attached to the inner arc surface 705 of the powder container 7 is first scraped off and discharged by the second powder scraping groove 904, thereby reducing the movement resistance of the large-particle powder to the powder metering wheel 9, and then the first powder scraping groove 903 scrapes off and discharges the remaining fine powder attached to the inner arc surface 705 of the powder container 7, thereby better ensuring the smoothness of the movement of the powder metering wheel 9 in the first cylindrical groove 716 of the powder container 7. The first powder scraping groove 903 and the second powder scraping groove 904 have different sizes. During the dosing stroke and the reset stroke of the powder metering wheel 9, that is, the process of the powder metering wheel 9 turning back from the fourth position to the third position, the first powder scraping groove 903 and the second powder scraping groove 904 can clean the powder on the inner arc surface 705 of the powder container 7 multiple times and in multiple gradients, which can further improve the accuracy of the dosing dose of the powder.

In one embodiment, the end surface of the first end of the powder metering wheel 9 has a first convex rib 908, which prevents friction between the plane and adjacent parts, and improves the smoothness of the reciprocating motion of the powder metering wheel 9 through contact friction of the rib.

In one embodiment, the end surface of the second end of the powder metering wheel 9 has a second convex rib 907, which prevents friction between the plane and adjacent parts, and improves the smoothness of the reciprocating motion of the powder metering wheel 9 through contact friction of the rib.

In one embodiment, the end surface of the first end of the powder metering wheel 9 has a first rib 908 , and the second end has a second rib 907 .

In one embodiment, referring to FIG. 14B , the first end of the powder metering wheel 9 further has a groove 911 and a driving elastic arm 910, the groove 911 is arranged outside the central hole 906, one end of the driving elastic arm 910 is connected to the side wall of the groove 911, and the other end is a free end, and the driving elastic arm 910 is arranged at intervals with the pressing elastic arm 909, one end of the wedge-shaped column 1005 of the dose protection plate 10 extends into the groove 911, and the driving elastic arm 910 is used to abut against the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset; the provision of the groove 911 can also reduce the weight of the powder metering wheel 9, making it easier to drive the powder metering wheel 9 to rotate. The specific method and process of the driving elastic arm 910 driving the dose protection plate 10 to rotate and reset will be described in detail in the subsequent process of resetting the outer cover 4 closing the cover triggering function mechanism, and will not be described in detail here.

10B and 14A, the surface of the main body 1200 of the driving cam 12 away from the gear 1203 also has an annular boss 1207, which is coaxially arranged with the gear 1203 and is used to drive the powder metering wheel 9 to rotate. Specifically, the second end of the powder metering wheel 9 has a boss 905, which is defined as a first boss, and the boss 905 of the powder metering wheel 9 is used to cooperate with the annular boss 1207 of the driving cam 12 to achieve rotational drive. Specifically, the two annular bosses 1207 are centrally symmetrically arranged with respect to the center of the center hole 1204, and the two bosses 905 are centrally symmetrically arranged with respect to the center of the center hole 906.

In a preferred embodiment, during the opening process, the angle of the outer cover 4 in the second position is 150 degrees. During the process of the outer cover 4 rotating from the first position (i.e., 0 degrees) to the second position, the outer cover 4 drives the driving gear 5 to rotate during the process of rotating from 0 degrees to 62.5 degrees (i.e., the outer cover 4 rotates 62.5 degrees), and then drives the driving cam 12 to rotate from 0 degrees to 75 degrees (i.e., the driving cam 12 rotates 75 degrees). During this process, the powder metering wheel 9 is in a stationary state, the boss 905 of the powder metering wheel 9 is not in contact with the annular boss 1207 of the driving cam 12, and the powder metering wheel 9 does not rotate at the third position; during the process of the outer cover 4 rotating from 62.5 degrees to 150 degrees (i.e., the outer cover 4 rotates 62.5 degrees), the outer cover 4 drives the driving gear 5 to rotate, and then drives the driving cam 12 to rotate from 0 degrees to 75 degrees (i.e., the driving cam 12 rotates 75 degrees). During this process, the powder metering wheel 9 is in a stationary state, the boss 905 of the powder metering wheel 9 is not in contact with the annular boss 1207 of the driving cam 12, and the powder metering wheel 9 does not rotate at the third position; That is, the outer cover 4 rotates 87.5 degrees), the outer cover 4 drives the driving gear 5 to rotate, and then drives the driving cam 12 to rotate from 75 degrees to 180 degrees (that is, the driving cam 12 rotates 105 degrees). During this process, the boss 905 of the powder metering wheel 9 is in contact with the annular boss 1207 of the driving cam 12, and the annular boss 1207 of the driving cam 12 cooperates with the boss 905 of the powder metering wheel 9 to drive the powder metering wheel 9 to rotate from the third position to the fourth position. The powder metering wheel 9 rotates 105 degrees during this process, that is, when the dosage cup 902 of the powder metering wheel 9 rotates from the powder outlet 713 position to the inlet 704 position of the inhalation channel 706, the rotation angle of the powder metering wheel 9 is 105 degrees.

During the process of the outer cover 4 rotating from 62.5 degrees to 150 degrees, the driving cam 12 rotates from 75 degrees to 180 degrees, driving the powder metering wheel 9 to rotate from the third position to the fourth position, that is, the dosage cup 902 of the powder metering wheel 9 rotates from the powder outlet 713 position of the powder container 7 to the inlet 704 position of the inhalation channel 706. The powder delivery mechanism in this process realizes the powder delivery process. During the opening process of the outer cover 4, a second opening load stroke is performed within this rotation range, which requires a larger torque. The torque of the outer cover 4 in the second opening load stroke is constant. Preferably, the torque of the outer cover 4 in the second opening load stroke is 0.1 N·m, ensuring that the outer cover 4 is opened at a uniform and stable speed without sudden torque until the opening is completed, thereby ensuring the powder delivery effect and avoiding powder leakage or flying waste.

The outer cover 4 is respectively linked with the powder metering wheel 9 and the air compression mechanism. When the outer cover 4 is configured to the first position, the airbag pressing piece 17 is limited to the fifth position. In the process of the outer cover 4 rotating from the first position to the second position, the airbag pressing piece 17 is firstly released from the limit, so that the elastic member 19 drives the airbag pressing piece 17 to move from the fifth position to the sixth position, and then drives the powder metering wheel 9 to rotate from the third position to the fourth position. In the process of the outer cover 4 reversing and resetting from the second position to the first position, the powder metering wheel 9 is driven to reverse and reset from the fourth position to the third position, and the airbag pressing piece 17 is driven to reverse and reset from the sixth position to the fifth position.

After the powder delivery mechanism completes the powder delivery process, the outer cover 4 rotates to the second position, the dosage cup 902 of the powder metering wheel 9 of the powder delivery mechanism is at a position corresponding to the inlet 704 of the inhalation channel 706, the outer cover 4 is fully opened and the outlet 102 of the suction nozzle 101 is exposed, and the user can inhale at the outlet 102 of the suction nozzle 101, so as to trigger the inhalation trigger mechanism to realize the inhalation trigger function.

Referring to Figures 15A to 23B, Figure 15A is a schematic structural diagram of the inhalation trigger device of the powder inhaler provided in Figure 1 when it is in one state on the powder container, Figure 15B is a schematic structural diagram of the inhalation trigger device provided in Figure 15A when it is in another state on the powder container, Figure 16A is a schematic structural diagram of the inhalation trigger device provided in Figure 15A after the powder container is removed, Figure 16B is a schematic structural diagram of the inhalation trigger device provided in Figure 15B after the powder container is removed, Figure 17A is a schematic structural diagram of the inhalation trigger device provided in Figure 16A at another angle, Figure 17B is a schematic structural diagram of the inhalation trigger device provided in Figure 16B at another angle, Figure 18A is a schematic structural diagram of the decomposed structure of the counting mechanism of the powder inhaler provided in Figure 1, Figure 18B is a schematic structural diagram of the assembly structure of the counting mechanism provided in Figure 18A, Figure 20 is a schematic structural diagram of the dose protection plate of the inhalation trigger device of the powder inhaler provided in Figure 1, and Figure 21A is a schematic structural diagram of the powder inhaler provided in Figure 1 21B is a schematic cross-sectional diagram of the assembly of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG. 1 in another state, FIG. 21C is a partially enlarged schematic diagram of FIG. 21A, FIG. 21D is a partially enlarged schematic diagram of FIG. 21B, FIG. 21E is a schematic cross-sectional diagram of the assembly of the powder metering wheel and the dose protection plate of the powder inhaler provided in FIG. 1 in another state, FIG. 21F is a partially enlarged schematic diagram of FIG. 21E, FIG. 22A is a structural schematic diagram of the air intake baffle of the inhalation trigger device of the powder inhaler provided in FIG. 1 at an angle, FIG. 22B is a structural schematic diagram of the air intake baffle provided in FIG. 22A at another angle, FIG. 22C is a structural schematic diagram of the air intake baffle provided in FIG. 22A at another angle, FIG. 23A is a structural schematic diagram of the front shell of the powder inhaler provided in FIG. 1 at an angle, and FIG. 23B is a structural schematic diagram of the front shell of the powder inhaler provided in FIG. 1 at another angle.

(3) Inhalation trigger mechanism

15A to 23B, the inhalation trigger mechanism includes an air intake baffle 11 and a dose protection plate 10, the dose protection plate 10 includes a shielding portion 1004, and the air intake baffle 11 cooperates with the dose protection plate 10. The powder inhaler also includes a reset torsion spring 15 and a drive torsion spring 16. The air intake baffle 11 and the dose protection plate 10 of the inhalation trigger mechanism are combined with the reset torsion spring 15, the drive torsion spring 16, the powder container 7, the powder metering wheel 9, and the drive cam 12 to realize the inhalation trigger function.

Referring to Figures 13A and 13B, the powder container 7 also has an airflow channel 708 connected to the inhalation channel 706, and the inhalation channel 706 needs to be connected to the outside atmosphere through the airflow channel 708. Referring to Figures 13A to 17B, when the inhalation trigger mechanism is in the initial state, the air inlet baffle 11 blocks the airflow channel 708, and the airflow channel 708 is not connected to the outside atmosphere. The shielding portion 1004 of the dose protection plate 10 shields the powder outlet of the dose cup 902 located at the inlet 704 of the inhalation channel 706. At this time, the inhalation channel 706 cannot be connected to the outside atmosphere through the airflow channel 708. When the negative pressure inside the inhalation channel 706 is greater than the threshold, that is, when the flow rate of the user's inhalation is higher than the working threshold, the inhalation trigger mechanism is triggered to act. Specifically, the air intake baffle 11 rotates and opens the air flow channel 708, the air flow channel 708 is connected to the outside atmosphere, the suction channel 706 is connected to the outside atmosphere through the air flow channel 708, and the air intake baffle 11 triggers the dose protection plate 10 to rotate, so that the shielding portion 1004 of the dose protection plate 10 deviates and does not shield the powder outlet of the dose cup 902, and the powder outlet of the dose cup 902 is exposed at the inlet 704 of the suction channel 706. The working threshold can be in the range of 15L/min to 35L/min, and preferably, the working threshold for triggering the action of the suction trigger mechanism is in the range of 20L/min to 25L/min.

It can be understood that an inhalation trigger mechanism is provided in the powder inhaler, and only when the flow rate of the user's inhalation is higher than the working threshold value, the air inlet baffle 11 will rotate and open the airflow channel 708, so that the inhalation channel 706 is connected to the outside atmosphere through the airflow channel 708, and the rotation of the air inlet baffle 11 will trigger the dose protection plate 10 to rotate so as not to block the powder outlet of the dose cup 902, so that the powder outlet of the dose cup 902 is connected to the inhalation channel 706, and the powder in the dose cup 902 is exposed, and is brought out and deagglomerated by the airflow in the inhalation channel 706. At this time, the air flow rate is relatively high, and the deagglomeration effect is better, so that the flow rate threshold control of the powder release is realized, the deagglomeration effect of the powder release is improved, and the waste of powder is avoided.

13B and 15A to 22C , a mounting hole 707 is provided on the side wall of the air inlet port of the air flow channel 708 , and the air inlet baffle 11 can be rotatably mounted on the mounting hole 707 . The air inlet baffle 11 is surrounded by the side wall of the air flow channel 708 .

Specifically, the air intake baffle 11 includes a baffle body 1110, and the baffle body 1110 is rotatably connected to the side wall of the air flow channel 708. In one embodiment, the air intake baffle 11 also includes a rotating shaft 1106, which is disposed at a first end of the baffle body 1110, and the rotating shaft 1106 passes through the mounting hole 707 on the side wall of the port of the air flow channel 708 and is rotatably connected to the mounting hole 707.

Referring to FIG. 9G, FIG. 9H, and FIG. 13A to FIG. 22C, the first surface of the baffle body 1110 has a boss 1101, and the first surface is the surface of the baffle body 1110 outside the port facing the airflow channel 708, and the boss 1101 is defined as a second boss, and the boss 1101 is used to increase the complexity of the side flow channel. Specifically, a boss 1101 protruding from the outer surface of the baffle body 1110 is provided on the baffle body 1110, so that the side flow channel changes from direct flow to an "L"-shaped flow channel, thereby improving the flow resistance of the airflow, achieving a lower trigger flow rate under the condition of the same wind-receiving area, and making it easier to realize the inhalation trigger function, so as to facilitate users with weak bodies to use the powder inhalation device. The "L"-shaped flow channel refers to a flow channel including a bent first flow channel section and a second flow channel section, and the angle between the first flow channel section and the second flow channel section can be 80-100 degrees, for example, 90 degrees, which will be described in detail later.

The outer surface of the baffle body 1110 of the present application is relative to the port of the airflow channel 708, and the surface facing the outer side of the port of the airflow channel 708 is defined as the outer surface. The boss 1101 can be formed by directly protruding from the outer surface of the baffle body 1110, for example, the baffle body 1110 is a solid structure; the boss 1101 can also be formed by being recessed from the baffle body 1110, that is, the boss 1101 is formed by bending a portion of the baffle body 1110 toward the outer side of the port facing the airflow channel 708, so that the baffle body 1110 is only a frame, which can reduce the weight of the air intake baffle 11. The boss 1101 can be integrally formed with the baffle body 1110, or the boss 1101 can be directly connected and fixed on the outer surface of the baffle body 1110 to form the boss 1101.

In one embodiment, the boss 1101 covers the central area of the surface of the baffle body 1110 outside the port facing the airflow channel 708, the projection of the boss 1101 on the baffle body 1110 is similar to the shape of the baffle body 1110, and the projection of the boss 1101 on the baffle body 1110 covers more than 60% of the area of the baffle body 1110, so as to further increase the flow resistance of the side flow channel, ensure the consistency of the suction resistance of the powder inhaler at each stage during the drug administration process, improve the drug administration effect of the powder inhaler, and further improve the user's compliance, so that the user has a better user experience. The area of the baffle body 1110 covered by the projection of the boss 1101 on the baffle body 1110 is related to the width of the annular surface 1109, and can be designed as needed.

In other embodiments, the boss 1101 covers other areas of the surface of the baffle body 1110 outside the port facing the airflow channel 708, the boss 1101 can also be set to other shapes, and the ratio of the projected area of the boss 1101 on the baffle body 1110 to the area of the baffle body 1110 can also be set to other values, as long as the boss 1101 can increase the complexity of the side flow channel and improve the flow resistance of the airflow.

In one embodiment, the height of the boss 1101 gradually decreases along the direction from the first end of the baffle body 1110 to the opposite second end (the direction away from the rotating shaft 1106), so that the top surface of the boss 1101 forms a slope, and the slope has a certain flow-guiding effect, which is convenient for guiding the direction of the airflow, so as to facilitate the realization of the inhalation trigger function.

Specifically, referring to FIG. 9G, FIG. 9H, FIG. 15A, FIG. 15B and FIG. 22A to FIG. 23B, the front housing 1 has a suction nozzle 101, which is arranged corresponding to the suction channel 706 and is connected to the suction channel 706, and the side wall of the front housing 1 is provided with an air inlet 104 and a grille 103, the grille protrudes from the outer wall surface of the front housing 1, and the air inlet 104 is connected to the outside atmosphere and the space inside the housing assembly. In a specific embodiment, the grille 103 corresponds to the position above the suction nozzle 101 and is adjacent to the air inlet 104, and the grille 103 protrudes from the outer wall surface of the front housing 1, which can prevent the lips of the user from contacting the air inlet 104 and blocking the air inlet 104 when the user inhales the powder from the suction nozzle 101, resulting in poor air intake or the outside atmosphere cannot enter the housing assembly from the outlet 109. As shown in Fig. 23B, in a preferred embodiment, the side wall of the front housing 1 is provided with three air inlets 104 and two grilles 103, and the grilles 103 are alternately arranged with the air inlets 104. In other embodiments, the air inlets 104 and the grilles 103 may be arranged at other positions, and they may also be arranged in any other number.

As shown in Figure 22C, along the circumference of the boss 1101, the outer peripheral side of the boss 1101 and the outer peripheral side of the baffle body 1110 are evenly spaced, and the surface of the baffle body 1110 facing the port outside the airflow channel 708 that is not covered by the boss 1101 forms an annular surface 1109, and the annular surface 1109 and the outer peripheral side of the boss 1101 are used to cooperate with the front shell 1 of the powder inhaler to form an L-shaped inlet airway. Specifically, as shown in Figures 23A and 23B, the inner wall surface of the front shell 1 is provided with an annular flange 111, and the annular flange 111 is arranged around the air inlet 104. Specifically, the annular flange 111 is arranged around three air inlets 104 and two grilles 103. Referring to Figures 9C to 9H, one end of the annular flange 111 is arranged in the airflow channel 708, and the side wall of the front shell 1 blocks the port of the airflow channel 708. When the inhalation trigger mechanism is in the initial state, the inner peripheral side of the annular flange 111 of the front housing 1 and the outer peripheral side of the boss 1101 of the air intake baffle 11 are spaced and matched to form a first flow channel section, and the end surface of the annular flange 111 away from one end of the front housing 1 abuts against the annular surface 1109 of the air intake baffle 11 and matches to form a second flow channel section, and the first flow channel section and the second flow channel section are connected to each other to form an L-shaped inlet flow channel Q1. That is, before the inhalation trigger mechanism is not triggered, the outside air enters the internal space of the housing assembly through the air inlet 104 on the front housing 1, and the L-shaped inlet flow channel Q1 formed by the baffle body 1110 of the air intake baffle 11, the boss 1101 and the annular flange 111 of the front housing 1 can allow the outside air to enter the inside of the powder inhaler, ensure the consistency of the suction resistance of the powder inhaler at each stage during the drug administration process, avoid the suction resistance inside the powder inhaler before the inhalation trigger is too large to affect the air compression process or the powder delivery process, and improve the drug administration effect of the powder inhaler.

When the user inhales from the nozzle 101 and the negative pressure inside the inhalation channel 706 is greater than a threshold, that is, when the airflow velocity when the user inhales is greater than the working threshold, the internal negative pressure will push the air intake baffle 11 to rotate and open the airflow channel 708, and the airflow channel 708 is connected to the outside atmosphere through the air inlet 104.

As shown in Figures 9G and 9H, the distance between the top surface of the boss 1101 of the air intake baffle 11 and the surface outside the port of the baffle body 1110 facing the air flow channel 708 is a first distance L1, that is, the height of the boss 1101 is L1, the thickness of the annular flange 111 of the inner wall surface of the front shell 1 is a second distance L2, and the ratio between the first distance L1 and the second distance L2 is 1:2-7:1. Preferably, the first distance L1 is greater than the second distance L2, and the ratio between the first distance L1 and the second distance L2 is 1:1-5:1. Setting the ratio between the first distance L1 and the second distance L2 within the above range can increase the pressure difference between the inner side and the outer side of the air intake baffle 11, that is, increase the pressure difference between the side of the air intake baffle 11 close to the air flow channel 708 and the side of the air intake baffle 11 close to the air inlet 104 of the front shell 1, increase other resistances, and increase the pressure difference on both sides of the air intake baffle 11 can be more conducive to driving the air intake baffle 11 to rotate to open the air flow channel 708, thereby making it easier to realize the air intake trigger function.

In one embodiment, the air intake baffle 11 also includes a rotating member 1108, a rotating shaft 1106 is disposed at one end of the baffle body 1110, the rotating member 1108 is connected to the free end of the rotating shaft 1106 and is spaced apart from the baffle body 1110, and the first end of the rotating member 1108 has a curved surface, the curved surface faces the outside of the port of the airflow channel 708 (specifically, the line connecting the two ends of the curved surface is basically parallel to the baffle body 1110). Specifically, the curved surface can be an arc-shaped surface, and the curved surface is used to guide the airflow so that the airflow path lengths on both sides of the baffle body 1110 are consistent.

Specifically, referring to Figures 9C, 13A, 13B, 15A and 15B, the side wall of the airflow channel 708 of the powder container 7 is connected to the side wall of the storage cavity 715, and the side wall of the airflow channel 708 is connected to one end of the side wall of the storage cavity 715. A first guide hole 710 and a second guide hole 717 are provided at a distance from each other. The end of the suction channel 706 close to the suction nozzle 101 has a first air flow inlet 718 and a second air flow inlet 719 spaced apart from each other. The first guide hole 710 connects the airflow channel 708 and the first air flow inlet 718, and the second guide hole 717 connects the airflow channel 708 and the second air flow inlet 719. The inner wall surface of the front shell 1 and the outer wall surface of the suction channel 706 are spaced apart to form a guide channel 720 (as shown in Figure 9C), and the guide channel 720 connects the airflow channel 708 with the first air flow inlet 718 and the second air flow inlet 719. Referring to FIG. 15B , when the flow rate of the user's inhaled airflow is greater than the working threshold and the negative pressure inside the inhalation channel 706 is greater than the threshold, the air intake baffle 11 rotates and opens the airflow channel 708, and the air intake port 104 on the front shell 1 passes through the first guide hole 710 and the second guide hole 717 through the airflow channel 708. After the outside atmosphere enters the shell assembly through the air intake port 104 of the front shell 1, part of the gas flows to the first guide hole 710 through the airflow channel 708, part of the gas flows to the second guide hole 717 through the airflow channel 708, and the remaining gas flows to the guide channel 720 through the airflow channel 708. Among them, the gas flowing out of the first guide hole 710 flows along the outer side of the side wall of the air flow channel 708 to the second curved surface 1104 and finally flows to the first air flow inlet 718, the gas flowing out of the second guide hole 717 flows along the outer side of the side wall of the air flow channel 708 to the first curved surface 1103 and finally flows to the second air flow inlet 719, and the gas flowing out of the guide channel 720 can enter the first air flow inlet 718 and the second air flow inlet 719 at the same time, so as to facilitate the inhalation of powder through the inhalation channel 706. It can be understood that the air inlet 104 of the front shell 1 is set to three, and the first guide hole 710, the second guide hole 717 and the guide channel 720 are respectively set, so that the ventilation cross-section of the three air flows can be consistent with the ventilation cross-section of the three air inlets 104 of the front shell 1, avoiding gas loss during air intake; at the same time, the first curved surface 1103 and the second curved surface 1104 are both arc-shaped surfaces, which can guide the direction of the air flow, so that the length of the air flow path on both sides of the baffle body 1110 is consistent.

In one embodiment, as shown in FIG. 13B and FIG. 15B , the inhalation channel 706 has two arcuate ribs arranged opposite to each other, and the two arcuate ribs and the side wall of the inhalation channel 706 are surrounded to form a vortex-shaped airway. The gas enters the inhalation channel 706 through the first airflow inlet 718 and the second airflow inlet 719 respectively, and then forms a vortex. The vortex carries the powder in the dosage cup 902 at the inlet 704 of the inhalation channel 706 into the inhalation channel 706, and finally flows to the suction nozzle 101 to be inhaled by the user after depolymerization in the inhalation channel 706. The above arrangement is more conducive to the depolymerization of powder such as powder in the inhalation channel 706, avoiding the waste of powder and improving the utilization rate of powder.

22A to 22C , the second end of the rotating member 1108 has a protruding cylinder 1102 on the surface away from the baffle body 1110 , and the cylinder 1102 is defined as a third cylinder. The cylinder 1102 is used to abut against the driving arm of the return torsion spring 15 of the powder inhaler, so that the baffle body 1110 fits the front shell 1 . Specifically, in one embodiment, the number of the rotating shafts 1106 is two, and the two rotating shafts 1106 are respectively disposed on opposite sides of the baffle body 1110, and the two rotating shafts 1106 are respectively defined as a first rotating shaft 1106a and a second rotating shaft 1106b, the number of the rotating members 1108 is two, and the two rotating members 1108 are respectively defined as a first rotating member 1108a and a second rotating member 1108b, the first rotating member 1108a is connected to the free end of the first rotating shaft 1106a, the first end of the first rotating member 1108a has a first curved surface 1103, and the surface of the second end away from the baffle body 1110 has a protruding cylinder 1102. The second rotating member 1108b is connected to the free end of the second rotating shaft 1106b, the first end of the second rotating member 1108b has a second curved surface 1104, and the second end has a circular arc groove surface 1107.

In one embodiment, the side of the baffle body 1110 also has a boss 1105 surrounding the rotating shaft 1106, and the boss 1105 is spaced apart from the rotating member 1108. The boss 1105 is used to maintain a uniform gap between the two sides of the baffle body 1110 and the side walls of the airflow channel 708, so as to facilitate a more stable implementation of the inhalation trigger function.

13A and 13B, and 15A to 22C, the powder container 7 further has a second cylindrical groove 712, which is coaxially disposed opposite to the first cylindrical groove 716 and has a common bottom wall (not shown), and the counting mechanism and the dose protection plate 10 are installed in the second cylindrical groove 712. Referring to FIGS. 15A to 19B, the counting mechanism includes a counter base 21, which has a cylindrical shaft 2111, and the dose protection plate 10 and the counter base 21 of the counting mechanism are both installed in the second cylindrical groove 712 on the powder container 7, and the counter base 21 limits the dose protection plate 10 in the axial direction. The powder inhaler also includes a driving torsion spring 16 and a reset torsion spring 15. The driving torsion spring 16 is sleeved on the cylindrical shaft 2111 of the counter base 21. The counter base 21 is provided with a limiting groove 2109. The fixed arm of the driving torsion spring 16 is fixed by the limiting groove 2109 on the counter base 21. The reset torsion spring 15 is installed on the gear bracket 14.

15A to 20, the dose protection plate 10 includes an annular body 1000, a shielding portion 1004 and a pressing member 1006. The pressing member 1006 of the dose protection plate 10 is disposed on the outer side of the annular body 1000. The shielding portion 1004 is connected to one end of the annular body 1000 and is spaced apart from the pressing member 1006. The shielding portion 1004 is used to shield or not shield the dose cup 902. The annular body 1000 is disposed in the second cylindrical groove 712 of the powder container 7. As shown in FIG18B, the annular body 1000 is used to accommodate the counting mechanism. The side wall of the second cylindrical groove 712 of the powder container 7 has a notch, and the pressing member 1006 extends out of the second cylindrical groove 712 through the notch on the side wall of the second cylindrical groove 712 and can rotate back and forth in the notch. As shown in Figure 20, the surface of the clamping member 1006 away from the annular body 1000 includes a clamping arc surface 1002. When the inhalation trigger mechanism is in the initial state, that is, before it is triggered or after the inhalation trigger mechanism is reset, the arc groove surface 1107 of the rotating member 1108 of the air intake baffle 11 cooperates with the clamping arc surface 1002 of the dose protection plate 10 to achieve concentric arc surface clamping.

The shielding portion 1004 is connected to one end of the annular body 1000, and is used to shield or not shield the dosage cup 902. As shown in FIG13B, the common bottom wall of the powder container 7 has an arc-shaped notch (not shown), so that the shielding portion 1004 of the dosage protection plate 10 passes through the arc-shaped notch and enters the first cylindrical groove 716, and can rotate back and forth in the arc-shaped notch, so as to be located at the entrance 704 of the inhalation channel 706 before the inhalation trigger mechanism is triggered and shield the dosage cup 902 at this position, and after the inhalation trigger mechanism is triggered, rotate in the arc-shaped notch away from the entrance 704 of the inhalation channel 706 to not shield the dosage cup 902, so that the powder in the dosage cup 902 is exposed, which is convenient for inhalation.

Specifically, referring to Figures 15A to 17B and Figure 20, the pressing member 1006 includes a cylindrical convex surface 1001, and the cylindrical convex surface 1001 is arranged on one side of the pressing arc surface 1002. As shown in Figures 16A and 16B, the driving arm of the driving torsion spring 16 of the powder inhaler acts on the cylindrical convex surface 1001, so that when the user's inhalation flow rate is higher than the working threshold, when the air intake baffle 11 rotates, the pressing arc surface 1002 of the dose protection plate 10 is separated from the arc groove surface 1107 of the air intake baffle 11, and the dose protection plate 10 rotates under the action of the driving arm of the driving torsion spring 16, so that the shielding portion 1004 of the dose protection plate 10 changes from shielding the dose cup 902 of the powder metering wheel 9 to not shielding, so that the powder in the dose cup 902 of the powder metering wheel 9 is exposed to the airflow to be inhaled by the user.

The following specifically introduces the movement mode of the inhalation trigger mechanism during the inhalation trigger process.

Referring to FIG. 9D and FIG. 15A to FIG. 22C, before the outer cover 4 is opened and in place, as shown in FIG. 15A, FIG. 16A, FIG. 17A and FIG. 22A, the driving arm of the reset torsion spring 15 acts on the cylinder 1102 of the air intake baffle 11, and the driving arm of the reset torsion spring 15 presses the air intake baffle 11 against the front housing 1, and the boss 1101 is embedded in the annular flange 111. The air intake baffle 11 does not rotate, and the suction channel 706 cannot communicate with the outside atmosphere through the air flow channel 708. As shown in FIG. 20 and FIG. 15A, the driving arm of the driving torsion spring 16 acts on the cylindrical convex surface 1001 of the pressing member 1006 of the dose protection plate 10. At this time, the pressing arc surface 1002 of the pressing member 1006 of the dose protection plate 10 acts on the arc groove surface 1107 of the rotating member 1108 of the air intake baffle 11 (as shown in FIG. 16A), realizing concentric arc surface pressing.

The guide groove 1209 of the driving cam 12 is located on the surface of the main body 1200 facing the gear 1203, and the surface of the main body 1200 facing away from the gear 1203 has a convex rib 1208. When the outer cover 4 is opened and in place, that is, the outer cover 4 rotates to the second position, the convex rib 1208 of the driving cam 12 presses the driving arm of the reset torsion spring 15 away from the cylinder 1102 of the air intake baffle 11 (as shown in Figure 17B), and the convex rib 1208 releases the reset torsion spring 15 from limiting the air intake baffle 11 of the suction trigger mechanism. At this time, the air intake baffle 11 is not affected by the pressing force of the reset torsion spring 15, and only the pressing friction force of the compression arc surface 1002 of the dose protection plate 10 on the arc groove surface 1107 of the air intake baffle 11 remains. At the same time, after the outer cover 4 rotates to the second position, the dosage cup 902 of the powder metering wheel 9 is delivered to the entrance 704 of the inhalation channel 706 , and the shielding portion 1004 of the dosage protection plate 10 is located at the entrance 704 of the inhalation channel 706 and shields the powder outlet of the dosage cup 902 .

After the outer cover 4 is opened and in place and before the inhalation trigger mechanism is triggered, the air inlet baffle 11 only has the friction force of the compression arc surface 1002 of the dose protection plate 10 on the circular arc groove surface 1107 of the air inlet baffle 11, and the air inlet baffle 11 still does not rotate. When the user inhales and the flow rate of the user's inhalation airflow is greater than the working threshold, and the negative pressure in the inhalation channel 706 is greater than the threshold, the airflow thrust generated by the inhalation airflow acts on the air inlet baffle 11, overcoming the friction force of the compression arc surface 1002 on the circular arc groove surface 1107, the inhalation trigger mechanism is triggered, and the air inlet baffle 11 produces a swinging rotation. After the air intake baffle 11 rotates, the arc groove surface 1107 of the air intake baffle 11 rotates synchronously, and the pressing arc surface 1002 of the dose protection plate 10 is disengaged from the arc groove surface 1107 of the air intake baffle 11 (as shown in FIG. 16B ). The dose protection plate 10 rotates under the driving force of the driving torsion spring 16, and the shielding portion 1004 of the dose protection plate 10 rotates synchronously in the arc-shaped notch, so that the shielding portion 1004 of the dose protection plate 10 deviates and does not block the powder outlet of the dose cup 902. At this time, the powder outlet of the dose cup 902 of the powder metering wheel 9 is exposed to the inhalation channel 706. Under the action of the user's inhalation airflow, the powder in the dose cup 902 flows through the inhalation channel 706 and the suction nozzle 101 and is inhaled by the user. In a preferred embodiment, the dose protection plate 10 rotates downward 38 degrees under the driving force of the drive torsion spring 16, so that the powder outlet of the dose cup 902 is connected to the suction channel 706, and the powder in the dose cup 902 is exposed to the airflow and taken away.

Referring to FIG. 14B and FIG. 20 , the dose protection plate 10 further includes a wedge-shaped column 1005, one end of which is connected to the annular body 1000 and is spaced apart from the shielding portion 1004 and the pressing member 1006, and the other end of the wedge-shaped column 1005 is used to cooperate with the driving elastic arm 910 of the powder metering wheel 9, so that during the closing process of the outer cover 4, the driving elastic arm 910 drives the dose protection plate 10 to rotate and reset through the wedge-shaped column 1005. The specific process and method of the driving elastic arm 910 driving the dose protection plate 10 to rotate and reset through the wedge-shaped column 1005 will be described in detail in the subsequent process of resetting the outer cover 4 closing trigger function mechanism, and will not be described in detail here.

Referring to FIG. 20 , the dose protection plate 10 further includes an elastic arm hook 1003, one end of which is connected to the annular body 1000. Specifically, one end of the elastic arm hook 1003 is connected to the inner wall surface of the annular body 1000, and the other end of the elastic arm hook 1003 is used to drive the counting mechanism to count. The counting mechanism and the method and counting process of the elastic arm hook 1003 driving the counting mechanism to count are specifically described below.

24A to 25 , FIG. 24A is a schematic diagram of the structure of the units digit wheel of the counting mechanism provided in FIG. 18A at one angle, FIG. 24B is a schematic diagram of the structure of the units digit wheel provided in FIG. 24A at another angle, and FIG. 25 is a schematic diagram of the structure of the tens digit wheel of the counting mechanism provided in FIG. 18A .

(4) Counting mechanism

18A, 18B, 22A to 25, the counting mechanism includes a counter base 21, a tens digit wheel 22, a ones digit wheel 23 and a counter intermediate gear 24, and the counting mechanism realizes the counting function under the cooperation of the dose protection plate 10 and the powder container 7. Specifically, the tens digit wheel 22 is mounted on the counter base 21, the counter base 21 has a cylindrical surface 2101, a snap 2102 and an outer arc boss 2108, the tens digit wheel 22 has an inner ring 2203 and an inner arc boss 2205, the cylindrical surface 2101 of the counter base 21 cooperates with the inner ring 2203 of the tens digit wheel 22 to realize coaxial rotation, the snap 2102 on the counter base 21 axially limits the tens digit wheel 22, and the outer arc boss 2108 of the counter base 21 cooperates with the inner arc boss 2205 of the tens digit wheel 22 to realize the rotation limit of the tens digit wheel 22.

4 and 25 , a digital display window 201 is provided on the shell assembly. Specifically, a digital display window 201 is provided on the rear shell 2 of the shell assembly, and the tens digit wheel 22 also has a full red warning feature 2201. When the full red warning feature 2201 of the tens digit wheel 22 is displayed in the digital display window 201 on the rear shell 2, the tens digit wheel 22 is limited and no longer rotates.

The counter base 21 is also provided with a first mounting hole 2103 , and the counter intermediate gear 24 is mounted on the first mounting hole 2103 on the counter base 21 . The counter intermediate gear 24 meshes with the gear features of the tens digit wheel 22 to achieve transmission.

The ones digit wheel 23 has a second mounting hole 2303 and a toothed shifting column 2301, and the counter base 21 is provided with a buckle column 2105. The second mounting hole 2303 on the ones digit wheel 23 cooperates with the buckle column 2105 on the counter base 21 to achieve coaxial mounting and axial limiting. The ones digit wheel 23 has an annular guide structure 2305 to cooperate with the tens digit wheel 22 for mounting. The outer peripheral side of the ones digit wheel 23 is printed with a first number 2302, and the outer peripheral side of the tens digit wheel 22 is printed with a second number 2202 for counting. The toothed shift post 2301 on the ones digit wheel 23 cooperates with the counter intermediate gear 24. When the ones digit wheel 23 rotates one circle and jumps from the number "0" to the number "9", the toothed shift post 2301 of the ones digit wheel 23 drives the counter intermediate gear 24 to rotate two teeth. At the same time, the tens digit wheel 22 meshes with the counter intermediate gear 24, and the tens digit wheel 22 synchronously rotates two teeth to achieve a digit jump.

Referring to FIG. 16A to FIG. 20 , the driving of the units digit wheel 23 is realized by the reciprocating motion of the dose protection plate 10. Specifically, as shown in FIG. 24A , a ratchet 2304 is provided on the units digit wheel 23. Referring to FIG. 20 , the dose protection plate 10 has an elastic arm hook 1003, one end of which is connected to the annular body 1000. The ratchet 2304 on the units digit wheel 23 cooperates with the elastic arm hook 1003 of the dose protection plate 10. Before the inhalation trigger mechanism is triggered, the elastic arm hook 1003 hooks one of the ratchet teeth 2304 on the units digit wheel 23. When the inhalation trigger mechanism is triggered, the air intake baffle 11 rotates and then triggers the dose protection plate 10 to rotate under the action of the driving arm of the driving torsion spring 16. The dose protection plate 10 rotates. The rotation of the protection plate 10 causes the elastic arm hook 1003 to rotate synchronously, and after the rotation, the elastic arm hook 1003 hooks the next ratchet 2304 on the units digit wheel 23; during the closing process of the outer cover 4, the air inhalation trigger mechanism is reset, the dose protection plate 10 reverses and returns to the original state before the air inhalation trigger mechanism is triggered. Since the elastic arm hook 1003 of the dose protection plate 10 hooks the next ratchet 2304 of the units digit wheel 23, during this process, the dose protection plate 10 reverses and hooks the ratchet 2304 and also rotates, and the units digit wheel 23 rotates under the action of the elastic arm hook 1003 to achieve a digital jump.

In a preferred embodiment, ten ratchets 2304 are provided on the ones digit wheel 23. When the inhalation trigger mechanism is triggered to move, the dose protection plate 10 is triggered to rotate 38 degrees, and the elastic arm hook 1003 hooks the next ratchet 2304. When the inhalation trigger mechanism is reset, the dose protection plate 10 rotates 38 degrees, and the ones digit wheel 23 rotates 36 degrees under the action of the elastic arm hook 1003 to achieve a digit jump.

Furthermore, a limiting elastic arm 711 is also provided on the powder container 7. Specifically, as shown in FIG. 13B , the side of the second cylindrical groove 712 of the powder container 7 has a limiting elastic arm 711, and the limiting elastic arm 711 is used to limit the unidirectional rotation of the counting mechanism. The limiting elastic arm 711 provided on the powder container 7 cooperates with the ratchet 2304 on the units digit wheel 23 to realize the unidirectional rotation of the units digit wheel 23, that is, when the dose protection plate 10 rotates downward, the elastic arm hook 1003 on the dose protection plate 10 scrapes the units digit wheel 23. Due to the action of the limiting elastic arm 711 on the ratchet 2304 of the units digit wheel 23, the units digit wheel 23 will not rotate with the dose protection plate 10. When the dose protection plate 10 is reset and rotated, the elastic arm hook 1003 on the dose protection plate 10 hooks the units digit wheel 23 and rotates 36° to realize unidirectional decreasing counting. The above arrangement can effectively prevent the elastic arm hook 1003 from driving the units digit wheel 23 when the dose protection plate 10 rotates downward, thereby preventing the counter from being abnormal.

For ease of understanding, the following describes the coordination relationship between the various functional mechanisms in conjunction with the cover closing process, as well as how to trigger the counting mechanism to count and how to reset the various functional mechanisms during the cover closing process.

The closing process of the outer cover 4, i.e., the process of the outer cover 4 reversing from the second position to the first position, drives the powder delivery mechanism and the air compression mechanism to reset respectively, and triggers the air intake baffle 11 to reverse and reset, so that the powder inhaler returns to its original state; wherein, the dose protection plate 10 is reset to drive the counter to achieve a digital count.

The angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the outer cover 4 in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In one embodiment, the angle of the outer cover 4 in the second position is 150 degrees, and the closing process of the outer cover 4 (the process of the outer cover 4 returning to the first position from the second position), that is, the process of the outer cover 4 reversing from 150 degrees to 0 degrees, first reverses a section of idle stroke, and the outer cover 4 drives the driving cam 12 to reverse a section of idle stroke. Preferably, the outer cover 4 first reverses an idle stroke of 62.5 degrees, and the corresponding driving cam 12 reverses an idle stroke of 75 degrees, that is, when the closing idle stroke of the outer cover 4 ends, the angle of the outer cover 4 is 87.5 degrees, and the angle of the driving cam 12 is 105 degrees. When the outer cover 4 is reversed from 87.5 degrees to 0 degrees, the driving cam 12 drives the powder metering wheel 9 to rotate and reset, and the powder metering wheel 9 rotates and resets from the fourth position to the third position, and the dosage cup 902 of the powder metering wheel 9 rotates from the position corresponding to the inlet 704 of the inhalation channel 706 to the position corresponding to the powder outlet 713 of the powder container 7, thereby realizing the reset of the powder delivery mechanism. In this process, the driving cam 12 is reversed from 105 degrees to 0 degrees. When the outer cover 4 returns to the first position, that is, after the cover is closed, the arc rib 405 on the outer cover 4 cooperates with the sound spring arm 108 on the front shell 1 to realize the sound prompt of the cover being closed in place, so as to prompt that the outer cover 4 is closed in place.

Since the outer cover 4 and the driving gear 5 are driven by gear meshing, there is a gear gap, which causes the outer cover 4 to be unable to be tightly closed with the front housing 1 after closing. In order to eliminate the problem that the outer cover 4 cannot be closed with the front housing 1 due to the gear gap after closing, as shown in Figures 8A and 8B, a tightening elastic arm 502 is provided on the driving gear 5, and the tightening elastic arm 502 is defined as a second tightening elastic arm. A limited position boss 106 is provided on the front housing 1. The tightening elastic arm 502 cooperates with the limited position boss 106 of the front housing 1 to achieve tightening closure, so that the outer cover 4 is tightly fitted with the front housing 1, ensuring that the cover is closed in place. At the same time, in the process of opening the outer cover 4, that is, in the process of the outer cover 4 rotating from the first position to the second position, the initial opening is an empty stroke, and the rotation of the outer cover 4 needs to overcome the resistance of the limited position boss 106 to the tightening elastic arm 502, so that the tightening elastic arm 502 can pass over the limited position boss 106 to facilitate the rotation of the outer cover 4, which can prevent the cover from being opened by mistake due to non-human factors.

Further, referring to Fig. 5A, Fig. 6A, Fig. 7A and Fig. 7B, the connecting portion 406 of the outer cover 4 provided with the arc rib 405 is also provided with a limiting groove 403, and the front shell 1 is also provided with a limiting convex column 107. When the outer cover 4 is closed in place, that is, when the outer cover 4 is in the first position, the limiting convex column 107 is clamped in the limiting groove 403 to limit the outer cover 4 in the first position. The outer cover 4 and the front shell 1 are tightly closed by the cooperation between the limiting groove 403 and the limiting convex column 107 of the front shell 1, and the outer cover 4 and the front shell 1 are well fitted, and there will be no gap due to incomplete closure. At the same time, at the beginning of the opening process of the outer cover 4, that is, in the opening idle stroke of the outer cover 4, it is also necessary to overcome the force of the limiting groove 403 on the limiting convex column 107, so that the limiting convex column 107 can be separated from the limiting groove 403 to facilitate the rotation of the outer cover 4, and further prevent the wrong opening of the cover due to non-human factors.

It can be understood that a limiting boss 106 and a tightening elastic arm 502 are set at a position corresponding to one of the connecting parts 406 of the outer cover 4, and a limiting groove 403 and a limiting boss 107 are set at a position corresponding to the other connecting part 406, and the closing limit is performed on the opposite sides of the outer cover 4, so that when the outer cover 4 is in the first position, the opposite sides of the outer cover 4 can achieve a good fit with the front shell 1, effectively avoiding the problem that the outer cover 4 is not closed in place, the outer cover 4 and the front shell 1 are closed on one side and there is a gap on the other side, thereby ensuring the consistency of the closed state.

During the closing process of the outer cover 4, since the tip of the protruding rod 1704 of the airbag pressing piece 17 is limited in the stop groove 1213, it is necessary to first drive the tip of the protruding rod 1704 of the airbag pressing piece 17 out of the stop groove 1213, that is, it is necessary to overcome the resistance of the stop groove 1213 to the tip of the protruding rod 1704 of the airbag pressing piece 17. During this process, the outer cover 4 performs the first idle stroke for closing the cover, and the outer cover 4 reverses from 150 degrees to 140 degrees, which requires a larger torque. Preferably, within the first idle stroke for closing the cover, the torque of the outer cover 4 is 0.05 N·m, and the driving cam 12 rotates to make the tip of the protruding rod 1704 of the airbag pressing piece 17 disengage from the stop groove 1213 and abut against the second curved surface segment 1212, which can effectively prevent the cover from being closed accidentally due to non-human factors.

When the outer cover 4 is reversed from 140 degrees to 87.5 degrees, the outer cover 4 drives the driving cam 12 to reverse to 105 degrees. During this process, the annular boss 1207 of the driving cam 12 does not contact the boss 905 of the powder metering wheel 9, and the powder metering wheel 9 does not rotate. The outer cover 4 performs the second closing cover idle stroke. Only the second driving cam 12 is reversed and reset. The tip of the convex rod 1704 of the airbag pressing piece 17 abuts against the second curved surface segment 1212. Since the second curved surface is an arc surface, during this process, the airbag pressing piece 17 does not move and is still in the sixth position. During this process, it is not necessary to drive the powder metering wheel 9 to rotate or to drive the airbag pressing piece 17 to reset. The torque required by the outer cover 4 in the second closing cover idle stroke is small and constant. Preferably, the torque of the outer cover 4 in the second closing cover idle stroke is 0N·m, so that the closing process is accelerated and the smoothness of closing the cover is increased.

When the outer cover 4 is reversed to 87.5 degrees, the annular boss 1207 of the driving cam 12 begins to contact the boss 905 of the powder metering wheel 9. In the process of the outer cover 4 reversing from 87.5 degrees to 62.5 degrees, the driving cam 12 is driven to reverse from 105 degrees to 75 degrees. In this process, the outer cover 4 performs the first cover load stroke, the annular boss 1207 of the driving cam 12 cooperates with the boss 905 of the powder metering wheel 9 and drives the powder metering wheel 9 to reverse, and the powder metering wheel 9 begins to rotate from the fourth position to the third position. In this process, only the powder metering wheel 9 is reset, and the tip of the convex rod 1704 of the airbag pressing piece 17 is still in contact with the second curved surface segment 1212, and the airbag pressing piece 17 is still in the sixth position. Since the outer cover 4 needs to drive the powder metering wheel 9 to reverse and reset in the first cover load stroke, a large constant torque is required. Preferably, the torque of the outer cover 4 in the first cover load stroke is 0.1N·m to ensure that the powder metering wheel 9 can be driven to reverse.

Furthermore, in the process of closing the outer cover 4, in a preferred embodiment, when the outer cover 4 is reversed from 62.5 degrees to 0 degrees, the driving cam 12 is reversed from 75 degrees to 0 degrees, and the first curved surface segment 1211 of the cam surface 1202 on the driving cam 12 cooperates with the curved surface 1703 of the airbag pressing piece 17. When the driving cam 12 is reversed, the first curved surface segment 1211 of the cam surface 1202 continuously lifts the airbag pressing piece 17 until the curved surface 1703 of the airbag pressing piece 17 falls into the arc-shaped groove 1201 of the driving cam 12, thereby completing the resetting of the air compression mechanism.

Referring to Figures 21A to 21F, specifically, during the closing process of the outer cover 4, in a preferred embodiment, during the process of the outer cover 4 being reversed from 56 degrees to 25 degrees, the driving cam 12 is reversed from 68 degrees to 30 degrees. During this process, the driving spring arm 910 on the powder metering wheel 9 cooperates with the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset.

Specifically, when the outer cover 4 is reversed from 87.5 degrees to 56 degrees, referring to FIG. 21A and FIG. 21C, the driving spring arm 910 on the powder metering wheel 9 does not contact the wedge-shaped column 1005 of the dose protection plate 10, and during this process, the dose protection plate 10 does not reverse. Referring to FIG. 21B and FIG. 21D, when the outer cover 4 is reversed to 56 degrees, the driving spring arm 910 on the powder metering wheel 9 begins to contact the wedge-shaped column 1005 of the dose protection plate 10, and when the outer cover 4 is reversed from 56 degrees to 25 degrees, the annular boss 1207 of the driving cam 12 contacts the boss 905 of the powder metering wheel 9, and the driving cam 12 reverses to drive the powder metering wheel 9 to reverse, and then the force of the driving spring arm 910 of the powder metering wheel 9 on the wedge-shaped column 1005 of the dose protection plate 10 drives the dose protection plate 10 to reverse 38 degrees, thereby achieving the reset of the dose protection plate 10. During the process of the outer cover 4 reversing from 8 degrees to 0 degrees, the dose protection plate 10 has been reset and no longer rotates. During this process, only the powder metering wheel 9 is still reversing, referring to Figures 21E and 21F. The driving spring arm 910 on the powder metering wheel 9 will pass over the wedge-shaped column 1005 of the dose protection plate 10. When the outer cover 4 is reversed to 0 degrees, the powder metering wheel 9 is reset into place, the limiting convex column 107 is stuck in the limiting groove 403, and the tightening spring arm 502 acts on the limiting boss 106 to ensure that the outer cover 4 is closed into place.

Before the outer cover 4 is closed, when the outer cover 4 is reversed to 12.5 degrees, the driving cam 12 is reversed to 15 degrees, and the rib 1208 on the driving cam 12 leaves the driving arm of the reset torsion spring 15. The driving arm of the reset torsion spring 15 acts on the cylinder 1102 on the air intake baffle 11 again, providing a reset force for the air intake baffle 11. Under the reset and pressing force of the reset torsion spring 15 on the air intake baffle 11, the air intake baffle 11 is reversed to complete the reset, and the pressing arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the air intake baffle 11 again to achieve concentric arc surface compression, and the dose protection plate 10 of the inhalation trigger mechanism is reset. When the outer cover 4 is reversed from 8 degrees to 0 degrees, the driving spring arm 910 on the driving powder metering wheel 9 passes over the wedge-shaped column 1005 on the dose protection plate 10. During this process, the outer cover 4 performs the third closing cover load stroke, driving the powder metering wheel 9 to continue to reverse, while the dose protection plate 10 has been reset and no longer reverses. After the driving spring arm 910 on the powder metering wheel 9 passes over the wedge-shaped column 1005 on the dose protection plate 10, the driving spring arm 910 no longer applies force to the wedge-shaped column 1005. Under the action of the driving torsion spring 16, the compression arc surface 1002 of the dose protection plate 10 will re-act on the arc groove surface 1107 of the air intake baffle 11 to achieve concentric arc surface compression. It is ensured that after the air intake trigger mechanism is reset, the powder metering wheel 9 is reset again to avoid the situation where the air intake trigger mechanism is not reset in place.

In the process of reversing the outer cover 4 from 62.5 degrees to 8 degrees, it is necessary to simultaneously perform the reverse reset of the powder metering wheel 9 and the upward reset process of the airbag press 17. In this process, the outer cover 4 performs the second cover load stroke, which requires a larger torque, and the torque of the second cover load stroke gradually increases. Preferably, within the second cover load stroke, the torque of the outer cover 4 gradually increases from 0.10N·m to 0.20N·m to ensure that the powder metering wheel 9 and the airbag press 17 can be continuously reset. When the outer cover 4 rotates to 8 degrees, the airbag press 17 is reset, that is, the airbag press 17 is reset to the fifth position, and the tip of the protruding rod 1704 of the airbag press 17 re-sinks into the arc groove 1201 to limit the airbag press 17. During the process of the outer cover 4 reversing from 8 degrees to 0 degrees, the outer cover 4 performs the third cover-closing load stroke. During this process, it is necessary to overcome the resistance of the powder metering wheel 9 passing over the wedge-shaped column 1005. Preferably, the torque of the outer cover 4 in the third cover-closing load stroke is 0.1 N·m until the cover is closed.

Specifically, in the first and second lid load strokes, the outer cover 4 drives the dose protection plate 10 to reset to the inlet 704 beyond the inlet channel 706 through the powder metering wheel 9, and compresses the driving torsion spring 16. At the same time, the reset torsion spring 15 drives the air intake baffle 11 to reset and rotate and close the air flow channel 708. In the third lid load stroke, the powder metering wheel 9 of the outer cover 4 is unhooked from the dose protection plate 10. Specifically, the driving spring arm 910 of the powder metering wheel 9 is unhooked from the wedge-shaped column 1005 of the dose protection plate 10. The driving torsion spring 16 drives the dose protection plate 10 to rotate so that the shielding portion 1004 of the dose protection plate 10 rotates to the inlet 704 of the inlet channel 706 and is limited by the inlet baffle 11 at the inlet 704 of the inlet channel 706.

26 to 27 , FIG. 26 is a schematic cross-sectional view of another embodiment of the powder inhaler provided by the present application, and FIG. 27 is a schematic cross-sectional view of yet another embodiment of the powder inhaler provided by the present application.

In the powder inhaler shown in FIG1 , a compressed air mechanism and a large-sized powder outlet 713 are used for powder filling. In this embodiment, referring to FIG9C and FIG9D , the cross-sectional area of the powder outlet 713 of the powder container 7 is larger than the cross-sectional area of the dosage cup 902 on the powder metering wheel 9. The powder outlet 713 of the powder container 7 is larger in size, which can realize the compressed air and powder filling process more efficiently. In other embodiments, the compressed air may not be performed in the manner shown in FIG9C .

For example, as shown in FIG26 , in another embodiment, the powder inhaler may not be provided with an air compression mechanism, and a large-sized powder outlet 713 may be directly used, so that the cross-sectional area of the powder outlet 713 of the powder container 7 is larger than the cross-sectional area of the dosage cup 902 on the powder metering wheel 9. Since the powder inhaler provided by each embodiment of the present application has an axis of the housing assembly parallel to the vertical direction during the opening and closing of the outer cover 4, during the powder filling process, the powder outlet 713 at the bottom of the storage cavity 715 is always located directly above the dosage cup 902 of the powder metering wheel 9 along the vertical direction, and the powder in the powder container 7 can be directly filled into the dosage cup 902 of the powder metering wheel 9 by the gravity of the powder in the storage cavity 715 of the powder container 7, thereby achieving powder filling.

Alternatively, as shown in FIG. 27 , in another embodiment, a compressed air mechanism may also be provided in the powder inhaler, but the powder outlet 713 of the powder container 7 is set to be a small-sized powder outlet 713. Specifically, the cross-sectional area of the powder outlet 713 of the powder container 7 is smaller than the cross-sectional area of the dosage cup 902 on the powder metering wheel 9. The cross-sectional shape of the powder outlet 713 may be circular or other shapes, and the diameter of the powder outlet 713 is between 1 mm and 3 mm, so that the powder in the powder container 7 is compacted and filled into the dosage cup 902 on the powder metering wheel 9 by the compressed air mechanism to achieve powder filling. The specific setting mode of compressed air and powder filling can be designed or selected as needed, and the present application does not limit this.

The following describes the specific operating state of the powder inhaler during the entire process from opening the cover to closing the cover, that is, the outer cover 4 rotates from the first position (0 degrees) to the second position (150 degrees), the user inhales, and the outer cover 4 rotates from the second position (150 degrees) to the first position (0 degrees).

(I) Opening process

The opening process of the outer cover 4, that is, the process of the outer cover 4 rotating from the first position (0 degrees) to the second position (150 degrees), includes the opening idle stroke, the air compression process and the powder delivery process in chronological order.

(1) Opening empty travel

During the lid opening idle stroke, the outer cover 4 rotates from 0 degrees to 12 degrees, wherein the outer cover 4 rotates from 0 degrees to 8 degrees to prevent the outer cover 4 from being opened by non-human factors, and the outer cover 4 rotates from 8 degrees to 12 degrees to prevent accidental lid opening. When the outer cover 4 is at the first position, i.e., 0 degrees, the outer cover 4 covers the suction nozzle 101.

(2) Compression process

During the air compression process, the outer cover 4 rotates from 12 degrees to 62.5 degrees. In the process of rotating the outer cover 4 from 12 degrees to 55 degrees, the air compression function is realized, so that the powder in the storage cavity 715 of the powder container 7 is compacted and filled into the dosage cup 902 of the powder metering wheel 9. When the outer cover 4 rotates to 55 degrees, the pressure relief hole 1702 and the vent hole 709 are at the critical point of connection. During the process of rotating the outer cover 4 from 55 degrees to 62.5 degrees, the pressure relief hole 1702 and the vent hole 709 are connected to realize the pressure relief function, and the compressed gas in the storage cavity 715 of the powder container 7 is released to normal pressure to avoid powder leakage when the powder metering wheel 9 rotates. In this process, the outer cover 4 can be opened instantly when opening the cover, so that the air compression mechanism can quickly compress the air and improve the air compression effect.

(3) Powder delivery process

During the powder delivery process, the outer cover 4 rotates from 62.5 degrees to 150 degrees, and the rotation of the outer cover 4 drives the driving cam 12 to rotate. The annular boss 1207 of the driving cam 12 contacts and cooperates with the boss 905 of the powder metering wheel 9. The driving cam 12 rotates and drives the powder metering wheel 9 to rotate 105 degrees, so that the powder metering wheel 9 rotates from the third position to the fourth position, and the dosage cup 902 of the powder metering wheel 9 rotates from the position corresponding to the powder outlet 713 of the storage chamber 715 of the powder container 7 to the position corresponding to the inlet 704 of the inhalation channel 706. When the outer cover 4 rotates to the second position, the arc rib 405 on the outer cover 4 cooperates with the sound spring arm 108 on the front shell 1 to realize the sound prompt of the cover opening position, prompting the outer cover 4 to be opened in place.

(II) Inspiratory triggering process

After the powder delivery process is completed, the dosage cup 902 of the powder metering wheel 9 is delivered to the position corresponding to the inlet 704 of the inhalation channel 706, the shielding portion 1004 of the dose protection plate 10 covers the dosage cup 902 of the powder metering wheel 9, the outer cover 4 is in the second position (150 degrees), and the outlet 102 of the suction nozzle 101 is exposed. When the user inhales at the outlet 102 of the suction nozzle 101, when the flow rate of the user's inhaled airflow is greater than the working threshold (20L/min~25L/min), and the negative pressure in the inhalation channel 706 is greater than the threshold, the inhalation trigger mechanism is triggered, the air intake baffle 11 rotates, and the compression arc surface 1002 of the dose protection plate 10 is separated from the arc groove surface 1107 of the air intake baffle 11. The dose protection plate 10 rotates 38 degrees under the driving action of the driving torsion spring 16, and the shielding portion 1004 of the dose protection plate 10 deviates from and does not shield the dose cup 902 of the powder metering wheel 9. The dose cup 902 is exposed at the inlet 704 of the inhalation channel 706, and the dose cup 902 is connected to the inhalation channel 706. The powder in the dose cup 902 is exposed to the user's inhaled airflow and is taken away, completing the inhalation trigger process.

(III) Closing process

After the inhalation triggering process is completed, the cover closing process is performed. During the cover closing process, the outer cover 4 is reversed and reset from the second position (150 degrees) to the first position (0 degrees), and the outer cover 4 drives the air compression mechanism, the powder metering wheel 9, the dose protection plate 10 and the air intake baffle 11 to reset during the cover closing process. Specifically, the cover closing process includes the cover closing idle stroke and the functional mechanism reset process.

(1) Close the cover and idle travel

During the cover closing idle stroke, the outer cover 4 reverses from 150 degrees to 87.5 degrees (i.e., the outer cover 4 reverses 62.5 degrees), wherein the process of the outer cover 4 rotating from 150 degrees to 140 degrees is to prevent non-human factors from triggering the cover closing. In the later stage of the cover closing idle stroke, the outer cover 4 rotates from 140 degrees to 87.5 degrees.

(2) Functional mechanism reset process

During the resetting process of the functional mechanism, the outer cover 4 is reversed from 87.5 degrees to 0 degrees. During this process, the powder metering wheel 9 is continuously reversed and reset from the fourth position to the third position. Among them, during the process of the outer cover 4 reversing from 87.5 degrees to 62.5 degrees, only the powder metering wheel 9 is reversing; during the process of the outer cover 4 reversing from 62.5 degrees to 8 degrees, the powder metering wheel 9 is reversing, and at the same time, the air bag pressure piece 17 is constantly pushing up to reset the air compression mechanism; wherein, during the process of the outer cover 4 reversing from 56 degrees to 25 degrees, the driving spring arm 910 on the powder metering wheel 9 cooperates with the wedge-shaped column 1005 of the dose protection plate 10 to drive the dose protection plate 10 to rotate and reset, and the compression arc surface 1002 of the dose protection plate 10 acts on the arc groove surface 1107 of the air intake baffle 11 again to achieve concentric arc surface compression, and the suction trigger mechanism completes the reset; during the process of the outer cover 4 reversing from 8 degrees to 0 degrees, the air compression mechanism has been reset. At this time, the closing stroke overcomes the rotational resistance of the powder metering wheel 9. When the outer cover 4 is in the first position (0 degrees), the powder metering wheel 9 is reset. When the outer cover 4 returns to the first position, the arc rib 405 on the outer cover 4 cooperates with the sound spring arm 108 on the front shell 1 to provide a sound prompt indicating that the outer cover 4 is fully closed.

As can be seen from the above, the outer cover 4 has different functions at different positions during the opening and closing process, such as an idle stroke or driving different functional mechanisms to operate. The present application designs the torque of the outer cover 4 in different strokes during the opening and closing process according to the different functions of the outer cover 4 at different positions during the opening and closing process, so that the opening and closing process of the powder inhaler is more suitable for the user's usage habits.

Referring to Figures 28 to 30B, Figure 28 is a cyclic schematic diagram of the opening and closing cover process of the powder inhaler provided in Figure 1, Figure 29A is a curve schematic diagram of the opening cover angle and the torque of one embodiment of the opening cover process of the powder inhaler provided in Figure 1, Figure 29B is a curve schematic diagram of the closing cover angle and the torque of one embodiment of the closing cover process of the powder inhaler provided in Figure 1, Figure 30A is a curve schematic diagram of the opening cover angle and the torque of another embodiment of the opening cover process of the powder inhaler provided in Figure 1, and Figure 30B is a curve schematic diagram of the closing cover angle and the torque of another embodiment of the closing cover process of the powder inhaler provided in Figure 1.

(I) Opening process

28 and 29A and 29B, in some embodiments, the stroke of the outer cover 4 rotating from the first position to the second position (i.e., the cover opening process) includes an open cover idle stroke and an open cover load stroke after the open cover idle stroke. For example, the stroke of the outer cover 4 rotating from the first position to the second position only includes an open cover idle stroke and an open cover load stroke after the open cover idle stroke.

In the empty stroke of opening the cover, the outer cover 4 does not trigger the action of the functional mechanism, and in the load stroke of opening the cover, the outer cover 4 triggers the functional mechanism to deliver powder to the inhalation channel 706, wherein the maximum torque of the outer cover 4 in the empty stroke of opening the cover is greater than the maximum torque in the load stroke of opening the cover, which can prevent the accidental opening of the cover due to non-human factors in the empty stroke of opening the cover, and at the same time, ensure fast or smooth operation at different stages in the load stroke of opening the cover. Preferably, the torque of the outer cover 4 in the empty stroke of opening the cover is greater than or equal to 0.05N·m and less than or equal to 0.3N·m, and the torque of the outer cover 4 in the load stroke of opening the cover is greater than or equal to 0N·m and less than or equal to 0.15N·m.

The angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the outer cover 4 in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In a preferred embodiment, the angle of the outer cover 4 in the second position is 150 degrees. The critical angle between the cover opening idle stroke and the cover opening load stroke is greater than or equal to 10 degrees and less than or equal to 15 degrees. In a preferred embodiment, the critical angle between the cover opening idle stroke and the cover opening load stroke is specifically 12 degrees, that is, the outer cover 4 is in the cover opening idle stroke from 0 degrees to 12 degrees, and the outer cover 4 is in the cover opening load stroke from 12 degrees to 150 degrees.

(1) Opening empty travel

The cover opening idle stroke includes a first cover opening idle stroke and a second cover opening idle stroke after the first cover opening idle stroke, and the critical angle between the first cover opening idle stroke and the second cover opening idle stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees. As shown in FIG. 25, in a preferred embodiment, the critical angle between the first cover opening idle stroke and the second cover opening idle stroke is 8 degrees. That is, the outer cover 4 is between 0 degrees and 8 degrees for the first cover opening idle stroke, and the outer cover 4 is between 8 degrees and 12 degrees for the second cover opening idle stroke.

Among them, the torque of the outer cover 4 in the first lid opening idle stroke is greater than or equal to 0.02N·m and less than or equal to 0.08N·m, and the torque of the outer cover 4 in the second lid opening idle stroke is greater than or equal to 0.1N·m and less than or equal to 0.2N·m. Preferably, the torque of the outer cover 4 in the first lid opening idle stroke is 0.05N·m, that is, the initial torque set at the outer cover 4 from 0 degrees to 8 degrees is 0.05N·m, which can effectively prevent non-human factors from opening. The torque of the outer cover 4 in the second lid opening idle stroke is 0.15N·m, that is, the torque set at the outer cover 4 from 8 degrees to 12 degrees is 0.15N·m. A larger opening resistance is set at the outer cover 4 from 8 degrees to 12 degrees to prevent accidental opening of the lid.

(2) Opening load stroke

The cover opening loading stroke includes a first cover opening loading stroke and a second cover opening loading stroke after the first cover opening loading stroke. The outer cover 4 triggers the air compression mechanism to press the powder from the storage chamber 715 into the dosage cup 902 during the first cover opening loading stroke. The outer cover 4 triggers the dosage cup 902 to deliver the powder to the inhalation channel 706 during the second cover opening loading stroke.

The critical angle between the first lid opening load stroke and the second lid opening load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees. In a preferred embodiment, the critical angle between the first lid opening load stroke and the second lid opening load stroke is 62.5 degrees. That is, the first lid opening load stroke of the outer cover 4 is from 12 degrees to 62.5 degrees, and the second lid opening load stroke of the outer cover 4 is from 62.5 degrees to 150 degrees.

The torque of the outer cover 4 in the first load stroke of opening the lid is constant and is greater than or equal to 0N·m and less than or equal to 0.05N·m. Preferably, the torque of the outer cover 4 in the first load stroke of opening the lid is 0N·m, that is, the torque of the outer cover 4 set between 12 degrees and 62.5 degrees is 0N·m, and the air compression process is carried out in the first load stroke of opening the lid. The torque within this angle range is set to 0N·m, and the lid can be opened instantly when opening, so that the air compression mechanism can quickly compress air and improve the air compression effect.

The torque of the outer cover 4 in the second load stroke of opening the lid is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer cover 4 in the second load stroke of opening the lid is 0.1 N·m, that is, the torque set by the outer cover 4 between 62.5 degrees and 150 degrees is 0.1 N·m. The outer cover 4 performs the powder delivery process in the second load stroke of opening the lid. At this stage, the outer cover 4 should be opened smoothly at a uniform speed, and the torque value set in the second load stroke of opening the lid is a constant torque of 0.1·m, without sudden torque change until the lid is opened, thereby ensuring the powder delivery effect.

(II) Closing process

Referring to Figures 28 and 29A and 29B, in some embodiments, the stroke of the outer cover 4 rotating from the second position to the first position (i.e., the cover closing process) includes a cover closing idle stroke and a cover closing load stroke after the cover closing idle stroke, wherein within the cover closing load stroke, the outer cover 4 triggers the functional mechanism to reset.

The angle of the outer cover 4 in the first position is defined as 0 degrees, and the angle of the outer cover 4 in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees. In a preferred embodiment, the angle of the outer cover 4 in the second position is 150 degrees. In some embodiments, the critical angle between the closed cover idle stroke and the closed cover load stroke is greater than or equal to 80 degrees and less than or equal to 95 degrees. Preferably, the critical angle between the closed cover idle stroke and the closed cover load stroke is 87.5 degrees. That is, the outer cover 4 is in the closed cover idle stroke from 150 degrees to 87.5 degrees, and the outer cover 4 is in the closed cover load stroke from 87.5 degrees to 0 degrees.

(1) Close the cover and idle travel

The maximum torque of the outer cover 4 in the empty stroke of closing the cover is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m. Preferably, the maximum torque of the outer cover 4 in the empty stroke of closing the cover can prevent the cover from being closed by mistake due to non-human factors.

In some embodiments, the cover closing idle stroke includes a first cover closing idle stroke and a second cover closing idle stroke after the first cover closing idle stroke, and the critical angle between the first cover closing idle stroke and the second cover closing idle stroke is greater than or equal to 135 degrees and less than or equal to 145 degrees. Preferably, the critical angle between the first cover closing idle stroke and the second cover closing idle stroke is 140 degrees. That is, the outer cover 4 has a first cover closing idle stroke from 150 degrees to 140 degrees, and the outer cover 4 has a second cover closing idle stroke from 140 degrees to 87.5 degrees.

The torque of the outer cover 4 in the first closing cover idle stroke is constant, which is greater than or equal to 0.03N·m and less than or equal to 0.07N·m. Preferably, the torque of the outer cover 4 in the first closing cover idle stroke is 0.05N·m, that is, the torque of the outer cover 4 between 150 degrees and 140 degrees is 0.05N·m, which can prevent non-human factors from triggering the closing of the cover.

The torque of the outer cover 4 in the second closing cover idle stroke is constant and is less than or equal to 0.02 N·m. Preferably, the torque of the outer cover 4 in the second closing cover idle stroke is 0 N·m, which can accelerate the closing process and increase the smoothness of closing the cover.

(2) Cover closing load stroke

The maximum torque of the outer cover 4 within the cover closing load stroke is greater than 0.05N·m and less than or equal to 0.3N·m. Specifically, the cover closing load stroke includes a first cover closing load stroke, a second cover closing load stroke, and a third cover closing load stroke, which are arranged in chronological order. The outer cover 4 only triggers the powder metering wheel 9 to reset and rotate within the first cover closing load stroke, and the outer cover 4 continues to trigger the powder metering wheel 9 to reset and rotate within the second cover closing load stroke and triggers the air compression mechanism to complete the reset. The outer cover 4 only triggers the powder metering wheel 9 to reset and rotate within the third cover closing load stroke, and triggers the powder metering wheel 9 to reset and rotate to the first position. The outer cover 4 also triggers the dose protection plate 10 and the air intake baffle 11 to complete the reset within the cover closing load stroke.

The critical angle between the first and second hatch cover load strokes is greater than or equal to 60 degrees and less than or equal to 65 degrees. Preferably, the critical angle between the first and second hatch cover load strokes is 62.5 degrees, that is, the first hatch cover load stroke is between 87.5 degrees and 62.5 degrees of the outer cover 4. The critical angle between the second and third hatch cover load strokes is greater than or equal to 6 degrees and less than or equal to 10 degrees. Preferably, the critical angle between the second and third hatch cover load strokes is 8 degrees, that is, the second hatch cover load stroke is between 62.5 degrees and 8 degrees of the outer cover 4, and the third hatch cover load stroke is between 8 degrees and 0 degrees of the outer cover 4.

Among them, the torque of the outer cover 4 within the first level cover load stroke is constant, which is greater than or equal to 0.05N·m and less than or equal to 0.15N·m. Preferably, the torque of the outer cover 4 within the first level cover load stroke is 0.1N·m, that is, the torque of the outer cover 4 between 87.5 degrees and 62.5 degrees is 0.1N·m, and only the powder metering wheel 9 rotates within the first level cover load stroke.

The torque of the outer cover 4 gradually increases within the second level cover load stroke, and its maximum value is greater than or equal to 0.15 N·m and less than or equal to 0.3 N·m. Preferably, the torque of the outer cover 4 gradually increases from 0.10 N·m to 0.20 N·m within the second level cover load stroke, that is, the torque of the outer cover 4 between 62.5 degrees and 8 degrees gradually increases from 0.10 N·m to 0.20 N·m. The powder metering wheel 9 is still rotating within the second level cover load stroke, and the airbag pressing piece 17 is in the process of continuously pushing up and resetting.

The torque of the outer cover 4 in the third cover load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. Preferably, the torque of the outer cover 4 in the third cover load stroke is 0.1 N·m, that is, the torque of the outer cover 4 from 8 degrees to 0 degrees is 0.1 N·m. The airbag pressing piece 17 has been reset in the third cover load stroke, and the cover closing stroke overcomes the rotation resistance of the powder metering wheel 9 until the cover is closed.

Referring to Figures 30A and 30B, in another embodiment, the opening and closing processes of the outer cover 4 of the powder inhaler can also be set according to the corresponding relationship between the opening and closing cover angle and the torque as shown in Figures 30A and 30B. In this embodiment, the torque change in the opening and closing process has a climbing curve, with fewer torque mutations, which is more user-friendly.

Referring to Figures 31A to 31E, Figure 31A is a schematic diagram of the powder inhaler provided in Figure 1 at an angled bottom view, Figure 31B is a schematic diagram of the powder inhaler provided in Figure 31A placed on a horizontal plane, Figure 31C is a schematic diagram of the powder inhaler provided in Figure 31A in a handheld state, Figure 31D is a schematic diagram of the powder inhaler provided in Figure 31A after opening the cover in the handheld state, and Figure 31E is a schematic diagram of the powder inhaler provided in Figure 31A in a mouth-inhaled state.

Referring to Figures 1, 5A, 5B, 31A and 31B, the outer cover 4 of the powder inhaler includes two connecting portions 406 arranged opposite to each other along a first direction and a free end 407 located on one side of the two connecting portions 406 along a second direction. The first direction intersects with the second direction, and the two connecting portions 406 are rotatably connected to the opposite sides of the bottom end of the shell assembly and protrude from the bottom end of the shell assembly. The free end 407 and the two connecting portions 406 are used to support the shell assembly so that the powder inhaler can be stably placed on a horizontal plane. The three supporting points of the two connecting portions 406 and the free end 407 can achieve stable placement to avoid tipping over due to unstable placement of the powder inhaler.

The present invention can ensure that the powder container 7 is always above the powder metering wheel 9 during the use and storage of the device. Excessive changes in the position state of the device will cause frequent movement of the powder in the powder container 7, resulting in powder variation and other problems. For example, the effective ingredients of the powder will be separated from the carrier, the powder particles will become smaller, and the small particles will accumulate at the bottom. This ensures that the powder in the powder container 7 is always in a relatively stable state throughout the service life of the powder inhaler.

For example, as shown in FIG. 31B , when the bottom end of the powder inhaler is placed on a horizontal plane, the inclination angle of the axis of the shell assembly relative to the vertical direction is greater than or equal to 0 degrees and less than or equal to 15 degrees. Preferably, when the bottom end of the powder inhaler is placed on a horizontal plane, the inclination angle of the axis of the shell assembly relative to the vertical direction is 6 degrees, which can further ensure that the position state of the device changes little and ensure that when the powder inhaler is placed on a horizontal plane (i.e., in a storage state), the powder in the powder container 7 is always in a relatively stable state.

For example, as shown in Figures 31C and 31D, when the powder inhaler is opened and closed by hand, the device is in a vertical state, and the axis of the shell assembly of the powder inhaler is parallel to the vertical direction, which is more convenient for opening and closing the cover and also makes the position state of the device change less, ensuring that the powder in the powder container 7 is in a relatively stable state during the process of opening and closing the cover.

For example, as shown in FIG31E , during the user's mouth inhalation, the inclination angle of the axis of the shell assembly of the powder inhaler relative to the vertical direction is greater than or equal to 0 degrees and less than or equal to 15 degrees. Preferably, during the user's mouth inhalation, the inclination angle of the axis of the shell assembly of the powder inhaler relative to the vertical direction is 15 degrees, which ensures that the position state of the powder inhaler changes little during the mouth inhalation process, the powder in the powder container 7 is in a relatively stable state, and also ensures the convenience of the user inhaling at the outlet 102 of the suction nozzle 101.

The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims (48)

A powder inhaler, comprising: Functional mechanisms, including suction channels; A suction nozzle, connected to the suction channel; The outer cover cooperates with the functional mechanism and is limited to rotate back and forth between a first position and a second position; when the outer cover is configured to the first position, the outer cover covers the suction nozzle; when the outer cover is configured to the second position, the outer cover does not cover the suction nozzle; The stroke of the outer cover rotating from the first position to the second position includes an open cover idle stroke and an open cover load stroke after the open cover idle stroke; in the open cover idle stroke, the outer cover does not trigger the action of the functional mechanism; in the open cover load stroke, the outer cover triggers the functional mechanism to deliver powder to the inhalation channel; and/or The stroke of the outer cover rotating from the second position to the first position includes a cover-closing idle stroke and a cover-closing load stroke after the cover-closing idle stroke; within the cover-closing idle stroke, the outer cover does not trigger the action of the functional mechanism; within the cover-closing load stroke, the outer cover triggers the functional mechanism to reset. The powder inhaler according to claim 1, wherein The lid opening idle stroke includes a first lid opening idle stroke and a second lid opening idle stroke after the first lid opening idle stroke; wherein the torque in the second lid opening idle stroke is greater than the torque in the first lid opening idle stroke; Preferably, the torque increases gradually or suddenly during the process of switching from the first lid opening idle stroke to the second lid opening idle stroke. The powder inhaler according to claim 1, wherein The cover opening load stroke includes a first cover opening load stroke and a second cover opening load stroke after the first cover opening load stroke; Wherein, the torque of the first lid opening load stroke is smaller than the torque of the second lid opening load stroke and/or the lid opening idle stroke. The powder inhaler according to claim 1, wherein The cover closing idle stroke includes a first cover closing idle stroke and a second cover closing idle stroke after the first cover closing idle stroke; Wherein, the torque of the first closing cover idle stroke is greater than the second closing cover idle stroke; Preferably, the torque within the idle stroke of the first closing cover is constant or gradually increases. The powder inhaler according to claim 1, wherein The cover closing load stroke includes a first cover closing load stroke, a second cover closing load stroke and a third cover closing load stroke which are arranged in chronological order; Wherein, the torque of the second cover load stroke is greater than the torque of the first cover load stroke and/or the third cover load stroke; Preferably, the torque of the load stroke of the third door cover is greater than or equal to the torque of the load stroke of the first door cover; Preferably, the torque of the second closing cover load stroke and/or the first closing cover load stroke increases gradually. The powder inhaler according to claim 1, wherein the functional mechanism comprises: Air compression mechanism; A powder delivery mechanism comprises a storage chamber and a dosage cup; the storage chamber is used to store powder, and the storage chamber has a powder outlet; the cover opening load stroke comprises a first cover opening load stroke and a second cover opening load stroke after the first cover opening load stroke; the outer cover triggers the air compression mechanism to press the powder from the storage chamber into the dosage cup in the first cover opening load stroke; the outer cover drives the dosage cup to deliver the powder to the inhalation channel in the second cover opening load stroke. The powder inhaler according to claim 6, wherein The delivery mechanism comprises a powder container and a powder metering wheel; the powder container has an inhalation channel and the storage chamber; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises the dosage cup; The outer cover triggers the air compression mechanism within the first cover opening load stroke to first compress air into the powder container and then relieve the pressure of the powder container; Wherein, the powder metering wheel is capable of rotating back and forth between a third position and a fourth position; when the powder metering wheel is configured to the third position, the dosage cup is correspondingly arranged with the powder outlet of the storage chamber for receiving the powder from the powder container; when the powder metering wheel is configured to the fourth position, the dosage cup is correspondingly arranged with the entrance of the inhalation channel; and the outer cover drives the dosage cup to rotate from the third position to the fourth position within the second lid opening load stroke. The powder inhaler according to claim 7, wherein the powder inhaler further comprises: The inhalation trigger mechanism comprises a dosage protection plate, an air intake baffle, a reset torsion spring and a driving torsion spring which are linked and cooperated; the reset torsion spring limits the air intake baffle to the air flow channel; the dosage protection plate is limited by the air intake baffle to the entrance of the inhalation channel and blocks the dosage cup; Wherein, the outer cover squeezes the return torsion spring within the second cover opening load stroke, thereby releasing the limit of the return torsion spring on the air intake baffle; When the negative pressure of the airflow channel is greater than a threshold, the air inlet baffle rotates under the action of the airflow to release the limit on the dose protection plate, and the dose protection plate rotates and deviates under the action of the driving torsion spring without covering the dose cup of the powder metering wheel. The powder inhaler according to claim 1, wherein the functional mechanism comprises: Air compression mechanism; A powder delivery mechanism comprises a powder container and a powder metering wheel; the powder container has a storage cavity for storing powder; the powder metering wheel is rotatably connected to the powder container; Among them, the closing cover load stroke includes a first closing cover load stroke, a second closing cover load stroke and a third closing cover load stroke which are arranged in chronological order; the outer cover only triggers the powder metering wheel to reset and rotate within the first closing cover load stroke; the outer cover continues to trigger the powder metering wheel to reset and rotate within the second closing cover load stroke and triggers the air compression mechanism to complete the reset; the outer cover only triggers the powder metering wheel to reset and rotate within the third closing cover load stroke, and triggers the powder metering wheel to reset and rotate to the first position. The powder inhaler according to claim 9, wherein the powder inhaler further comprises: The inhalation trigger mechanism comprises a dosage protection plate, an air intake baffle, a reset torsion spring and a driving torsion spring which are linked and cooperated; the reset torsion spring limits the air intake baffle to the air flow channel; the dosage protection plate is limited by the air intake baffle to the entrance of the inhalation channel and blocks the dosage cup of the powder metering wheel; Wherein, the outer cover squeezes the return torsion spring within the cover opening load stroke, thereby releasing the limit of the return torsion spring on the air intake baffle; When the negative pressure of the airflow channel is greater than a threshold value, the air inlet baffle rotates under the action of the airflow to open the airflow channel and releases the limit on the dose protection plate, and the dose protection plate rotates and deviates under the action of the driving torsion spring without covering the dose cup of the powder metering wheel; Furthermore, the outer cover also triggers the dose protection plate and the air intake baffle to reset within the cover closing load stroke. The powder inhaler according to claim 10, wherein The outer cover drives the dose protection plate to return to a position beyond the entrance of the inhalation passage through the powder metering wheel within the first cover closing load stroke and the second cover closing load stroke, and compresses the driving torsion spring; at the same time, the return torsion spring drives the air intake baffle to return and rotate and close the airflow passage; When the outer cover is in the third cover load stroke, the powder metering wheel is decoupled from the dose protection plate, the drive torsion spring drives the dose protection plate to rotate to the entrance of the inhalation channel, and is limited by the air intake baffle at the entrance of the inhalation channel. The powder inhaler according to any one of claims 1 to 11, wherein The angle of the outer cover when in the first position is defined as 0 degrees, and the angle of the outer cover when in the second position is greater than or equal to 120 degrees and less than or equal to 180 degrees; Preferably, the angle of the outer cover when in the second position is 150 degrees; The critical angle between the cover opening idle stroke and the cover opening load stroke is greater than or equal to 10 degrees and less than or equal to 15 degrees; and/or, the torque of the outer cover in the cover opening idle stroke is greater than or equal to 0.05N·m and less than or equal to 0.3N·m, and the torque of the outer cover in the cover opening load stroke is greater than or equal to 0N·m and less than or equal to 0.15N·m; and/or, The lid opening idle stroke includes a first lid opening idle stroke and a second lid opening idle stroke after the first lid opening idle stroke; a critical angle between the first lid opening idle stroke and the second lid opening idle stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees; and/or, the torque of the outer cover in the first lid opening idle stroke is greater than or equal to 0.02N·m and less than or equal to 0.08N·m, and the torque of the outer cover in the second lid opening idle stroke is greater than or equal to 0.1N·m and less than or equal to 0.2N·m; and/or, The cover opening load stroke includes a first cover opening load stroke and a second cover opening load stroke after the first cover opening load stroke; a critical angle between the first cover opening load stroke and the second cover opening load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees; and/or, the torque of the outer cover within the first cover opening load stroke is constant, which is greater than or equal to 0 N·m and less than or equal to 0.05 N·m; the torque of the outer cover within the second cover opening load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m; and/or, The critical angle between the cover-closing idle stroke and the cover-closing load stroke is greater than or equal to 80 degrees and less than or equal to 95 degrees; and/or, the maximum torque of the outer cover in the cover-closing idle stroke is greater than or equal to 0.03 N·m and less than or equal to 0.07 N·m; the maximum torque of the outer cover in the cover-closing load stroke is greater than 0.05 N·m and less than or equal to 0.3 N·m; and/or, The cover closing idle stroke includes a first cover closing idle stroke and a second cover closing idle stroke after the first cover closing idle stroke; a critical angle between the first cover closing idle stroke and the second cover closing idle stroke is greater than or equal to 135 degrees and less than or equal to 145 degrees; and/or, the torque of the outer cover in the first cover closing idle stroke is constant, which is greater than or equal to 0.03N·m and less than or equal to 0.07N·m; the torque of the outer cover in the second cover closing idle stroke is constant, which is less than or equal to 0.02N·m; and/or, The closing cover load stroke includes a first closing cover load stroke, a second closing cover load stroke and a third closing cover load stroke which are arranged in chronological order; a critical angle between the first closing cover load stroke and the second closing cover load stroke is greater than or equal to 60 degrees and less than or equal to 65 degrees; a critical angle between the second closing cover load stroke and the third closing cover load stroke is greater than or equal to 6 degrees and less than or equal to 10 degrees; and/or, the torque of the outer cover within the first closing cover load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m; the torque of the outer cover within the second closing cover load stroke gradually increases, and its maximum value is greater than or equal to 0.15 N·m and less than or equal to 0.3 N·m; the torque of the outer cover within the third closing cover load stroke is constant, which is greater than or equal to 0.05 N·m and less than or equal to 0.15 N·m. An air intake baffle for a powder inhaler, comprising: Baffle body; The first surface of the baffle body has a boss, and the outer peripheral side surface of the boss is spaced apart from the outer peripheral side surface of the baffle body. The air intake baffle according to claim 13, wherein: The boss covers a central area of the first surface of the baffle body. The air intake baffle according to claim 14, wherein, along the circumference of the boss, the outer peripheral side surface of the boss and the outer peripheral side surface of the baffle body are evenly spaced apart; and a portion of the first surface of the baffle body not covered by the boss forms an annular surface. The air intake baffle according to claim 13, wherein: The air intake baffle further includes a rotating shaft, which is disposed at the first end of the baffle body; Along the direction from the first end to the opposite second end of the baffle body, the height of the boss gradually decreases, so that the top surface of the boss forms an inclined surface. The air intake baffle according to claim 13, wherein: The baffle body is recessed to form the boss. The air intake baffle according to claim 13, wherein: The air intake baffle further comprises a rotating shaft and a rotating member; the rotating shaft is arranged at one end of the baffle body; the rotating member is connected to the free end of the rotating shaft and is spaced apart from the baffle body; Wherein, the first end of the rotating member has a curved surface. The air intake baffle according to claim 18, wherein: The second end of the rotating member has a protruding cylinder on a surface away from the baffle body. The air intake baffle according to claim 19, wherein: The number of the rotating shafts is two, which are respectively arranged on opposite sides of the baffle body and are defined as a first rotating shaft and a second rotating shaft; the number of the rotating members is two, which are defined as a first rotating member and a second rotating member; The first rotating member is connected to the free end of the first rotating shaft, the first end of the first rotating member has a first curved surface, and the surface of the second end away from the baffle body has the protruding cylinder; The second rotating member is connected to the free end of the second rotating shaft, the first end of the second rotating member has a second curved surface, and the second end has a circular arc groove surface. The air intake baffle according to claim 18, wherein: There are two rotating shafts, which are respectively arranged on opposite sides of the baffle body; one end of each rotating shaft is connected to the side surface of the baffle body; The side surface of the baffle body also has a boss surrounding the rotating shaft, and the boss is spaced apart from the rotating member. A dose protection plate for a powder inhaler, comprising: Ring-shaped body; The shielding portion is connected to one end of the annular body and is used to shield or not shield the dosage cup of the powder inhaler. The dose protection plate according to claim 22, wherein: The dose protection plate further comprises a pressing piece, and the pressing piece is arranged on the outer side surface of the annular body; and the surface of the pressing piece away from the annular body comprises a pressing arc surface. The dose protection plate according to claim 23, wherein: The pressing member comprises a cylindrical convex surface, and the cylindrical convex surface is arranged on one side of the pressing arc surface. The dose protection plate according to claim 22, wherein: The dose protection plate further comprises an elastic arm hook, one end of which is connected to the annular body. The dose protection plate according to claim 22, wherein: The dose protection plate further includes a wedge-shaped column, one end of which is connected to the annular body. An inhalation trigger mechanism, comprising: The air intake baffle according to any one of claims 13 to 21; and/or A dose protection plate as claimed in any one of claims 22 to 26. A powder inhaler, comprising: A powder delivery mechanism, comprising a powder container and a powder metering wheel; the powder container has a storage chamber, an inhalation channel and an air flow channel; the inhalation channel is communicated with the air flow channel; the storage chamber is used to store powder, and the storage chamber has a powder outlet; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel comprises a dosage cup; the dosage cup is used to receive the powder from the powder outlet and deliver the powder to the inlet of the inhalation channel; The inhalation trigger mechanism according to claim 27; wherein the air intake baffle is rotatably connected to the side wall of the air flow channel, and the first surface of the baffle body faces the outside of the port of the air flow channel; the dose protection plate is rotatably connected to the powder container; the air intake baffle is linked with the dose protection plate; Wherein, when the air inhalation trigger mechanism is in the initial state, the air inlet baffle blocks the air flow channel, and the inhalation channel is not connected to the outside atmosphere; the shielding portion shields the powder outlet of the dosage cup located at the entrance of the inhalation channel; When the negative pressure inside the suction channel is greater than a threshold value, the air intake baffle rotates to open the airflow channel and triggers the dose protection plate to rotate, so that the shielding portion deviates and does not block the powder outlet of the dose cup, and the airflow channel connects the outside atmosphere and the suction channel. The powder inhaler according to claim 28, wherein the powder inhaler further comprises: A housing assembly, comprising a front housing, the front housing having a suction nozzle, the suction nozzle being arranged corresponding to the suction channel and being connected to the suction channel; a side wall of the front housing having an air inlet and a grille, the grille protruding from an outer wall surface of the front housing; an inner wall surface of the front housing having an annular flange surrounding the air inlet, one end of the annular flange being arranged in the air flow channel, and the side wall of the front housing blocking a port of the air flow channel; The air intake baffle has the annular surface; when the air intake trigger mechanism is in the initial state, the boss is embedded in the annular flange, the inner peripheral side surface of the annular flange and the outer peripheral side surface of the boss are spaced and matched to form a first flow channel section, the end surface of the annular flange away from the end of the front shell body abuts against the annular surface and matches to form a second flow channel section, and the first flow channel section and the second flow channel section form an L-shaped intake flow channel; the compression arc surface cooperates with the arc groove surface of the air intake baffle to achieve concentric arc surface compression; When the negative pressure inside the suction channel is greater than a threshold value, the air intake baffle rotates to open the air flow channel, and the air flow channel is connected to the outside atmosphere through the air intake port. The powder inhaler according to claim 29, wherein the ratio between the distance between the top surface of the boss and the first surface of the baffle body and the thickness of the annular flange is 1:2-7:1. The powder inhaler according to claim 29, wherein the side wall of the front shell is provided with at least two air inlets and at least one grille, the grilles and the air inlets are arranged alternately; the annular flange is arranged around the air inlets and the grilles; The side wall of the airflow channel is connected to the side wall of the storage chamber, and one end of the side wall of the airflow channel connected to the side wall of the storage chamber is provided with a first guide hole and a second guide hole spaced apart from each other; the end of the suction channel close to the suction nozzle is provided with a first airflow inlet and a second airflow inlet spaced apart from each other, the first guide hole connects the airflow channel and the first airflow inlet, and the second guide hole connects the airflow channel and the second airflow inlet; The inner wall surface of the front shell and the outer wall surface of the suction channel are spaced apart to form a guide channel, and the guide channel connects the airflow channel with the first airflow inlet and the second airflow inlet. The powder inhaler according to claim 29, wherein the powder inhaler further comprises: an outer cover, rotatably connected to the housing assembly and capable of reciprocating between a first position and a second position; when the outer cover is configured to be in the first position, the outer cover covers the suction nozzle and the air inlet; when the outer cover is configured to be in the second position, the suction nozzle and the air inlet are exposed; a gas compression mechanism, disposed on the powder container, for pressing the powder in the powder container into the dosage cup; The powder metering wheel can rotate back and forth between a third position and a fourth position; when the powder metering wheel is configured to the third position, the dosage cup is arranged correspondingly to the powder outlet of the storage chamber; when the powder metering wheel is configured to the fourth position, the dosage cup is arranged correspondingly to the entrance of the inhalation channel; The outer cover is respectively linked with the powder delivery mechanism and the air compression mechanism; when the outer cover rotates from the first position to the second position, the air compression mechanism is first driven to press the powder in the storage chamber into the dosage cup, and then the powder metering wheel is driven to rotate from the third position to the fourth position; During the process of the outer cover reversing and resetting from the second position to the first position, the powder metering wheel, the dose protection plate and the air compression mechanism are respectively driven to reset, and the air intake baffle is triggered to reverse and reset. An air bag pressing piece, used for a powder inhaler; wherein: The side wall of the airbag pressing piece is provided with a pressure relief hole; the airbag pressing piece is used for squeezing the compressed airbag. The airbag pressure piece according to claim 33, wherein: One end of the side wall of the airbag pressing piece away from the top wall has a convex rod, and one end of the convex rod away from the top wall has a curved surface. The airbag pressure piece according to claim 34, wherein the end of the protruding rod away from the top wall has a pointed tip, and the end surface of the pointed tip is the arc surface. The airbag pressure piece according to claim 34, wherein the arc surface is a circular arc surface. The airbag pressure piece according to any one of claims 33 to 36, wherein: The top wall of the airbag pressing piece is provided with a fixing hole, and the fixing hole is used to connect the top of the compressed airbag to drive the compressed airbag to expand and contract. A driving cam for a powder inhaler, comprising: Body part; A gear, coaxially connected to the main body, and used to drive the main body to rotate; Wherein, a surface of the main body is provided with a guide groove, and a side surface of the guide groove is a cam curved surface. The drive cam according to claim 38, wherein: The outer peripheral side surface of the main body portion has an arc-shaped groove located at one end of the cam curved surface. The drive cam according to claim 39, wherein: The gear is disposed on a surface of the main body, and the guide groove is disposed on a surface of the main body facing the gear and is spaced apart from the gear; The cam surface includes a first curved surface segment and a second curved surface segment connected to each other, and the second curved surface segment is located at an end of the first curved surface segment away from the arc-shaped groove; the first curved surface segment is a non-circular curved surface, and the second curved surface segment is a circular curved surface and is concentrically arranged with the outer peripheral side surface of the main body. The driving cam according to claim 40, wherein a stop groove is provided at one end of the second curved surface segment away from the first curved surface segment. The drive cam according to claim 41, wherein: The arc-shaped groove and/or the stop groove are/is an arc-shaped groove. The drive cam according to claim 40, wherein: A surface of the main body facing away from the gear has a convex rib; one end of the convex rib is arranged corresponding to the end of the second curved surface segment close to the first curved surface segment. The drive cam according to claim 41, wherein: The surface of the main body away from the gear also has an annular boss; the annular boss is coaxially arranged with the gear. A gas compression mechanism, comprising: Pressurized air bag; Elastic parts; An airbag pressure piece as claimed in any one of claims 33 to 37; and/or A drive cam as claimed in any one of claims 38 to 44. The air compression mechanism according to claim 45, wherein the arc surface of the convex rod cooperates with the cam curved surface of the driving cam to realize the reciprocating movement of the airbag pressure piece between the fifth position and the sixth position; When the airbag pressing piece is configured to be in the initial position, the tip of the convex rod is embedded in the arc-shaped groove of the cam curved surface to achieve the initial positioning of the airbag pressing piece. A powder inhaler, comprising: A powder delivery mechanism comprises a powder container; the powder container has a storage cavity, a first end of the storage cavity has a powder outlet, and a second end of the storage cavity has a compressed air port; a side wall of the storage cavity has a vent hole; The gas compression mechanism according to claim 45 or 46; Wherein, the compressed air bag is arranged at the second end of the storage cavity and is connected to the compressed air port; the air bag pressing piece is movably sleeved on the outer side of the compressed air bag and the storage cavity; The driving cam and the elastic member are used to drive the airbag pressure piece to move back and forth between the fifth position and the sixth position, thereby driving the compressed air bag to expand and contract; when the airbag pressure piece is configured to the fifth position, the side wall of the airbag pressure piece blocks the vent hole, and the pressure relief hole is not connected to the vent hole; when the airbag pressure piece is configured to the sixth position, the pressure relief hole is connected to the vent hole to relieve pressure in the storage chamber. The powder inhaler according to claim 47, wherein the powder inhaler further comprises: A filter membrane is arranged at the second end of the storage cavity; the filter membrane is located at the compressed air port and is spaced apart from the port of the compressed air port; one end of the vent is connected to the space between the filter membrane and the compressed air bag; A housing assembly having a suction nozzle; an outer cover, rotatably connected to the housing assembly and capable of reciprocating between a first position and a second position; when the outer cover is configured to be in the first position, the outer cover covers the suction nozzle; when the outer cover is configured to be in the second position, the suction nozzle is exposed; The powder delivery mechanism further includes a powder metering wheel; the powder container further includes an inhalation channel, the inhalation nozzle is connected to the inhalation channel; the powder metering wheel is rotatably connected to the powder container; the powder metering wheel includes a dosage cup; the powder metering wheel can rotate back and forth between a third position and a fourth position; when the powder metering wheel is configured to the third position, the dosage cup is correspondingly arranged at the powder outlet of the storage chamber for receiving the powder from the powder container; when the powder metering wheel is configured to the fourth position, the dosage cup is correspondingly arranged at the entrance of the inhalation channel; The outer cover is respectively linked with the powder metering wheel and the air compression mechanism; when the outer cover is configured to be in the first position, the airbag pressure piece is limited to the fifth position; during the process of the outer cover rotating from the first position to the second position, the airbag pressure piece is firstly released from the limit, so that the elastic member drives the airbag pressure piece to move from the fifth position to the sixth position, and then drives the powder metering wheel to rotate from the third position to the fourth position; During the process of the outer cover being reversed and reset from the second position to the first position, the powder metering wheel is driven to be reversed and reset, and the airbag pressing piece is driven to move in the opposite direction and reset to the fifth position.