CN111317178A - A low temperature smoking set - Google Patents

Abstract

The invention discloses a low-temperature smoking device, comprising a casing, a heating body is arranged in the casing, and a driving component for driving the heating body to be inserted into or withdrawn from a heating cavity, the driving component comprises a DC motor, a Hall switch, a screw rod and a socket On the slider outside the screw rod, the screw rod is connected with the DC motor through a reducer. The slider is slidably installed on the slide rail in the housing and connected to the heating body. The DC motor, the Hall switch and the PCB board in the housing are electrically The output shaft of the DC motor is provided with a magnetic piece that rotates synchronously with it for triggering the Hall switch. The present invention obtains the signal of the number of revolutions of the motor through the magnetic parts and the magnetic induction Hall switch that move synchronously with the motor, and relies on the relationship between the number of revolutions of the motor and the value of the transmission ratio of the reduction box, the value of the screw pitch and the required displacement distance of the heating element. It can accurately drive the linear displacement distance of the heating body and realize the precise control of the displacement of the heating body.

Description

A low temperature smoking set

technical field

The invention belongs to the technical field of smoking articles, in particular to a low-temperature smoking article.

Background technique

As a new type of tobacco appliance, low-temperature tobacco is roasted for a rated time at a temperature far lower than the burning temperature of traditional tobacco open fire, which effectively reduces the harmful substances produced by traditional tobacco burning, so as to achieve the purpose of bringing less health damage to users.

The heating element is placed in the tobacco for heating. After the tobacco is baked and heated, some substances are volatilized, and the tobacco shrinks and adheres to the heating element under the action of the smoking airflow. Directly pulling out the cigarette will cause the tobacco waste to stick to the smoking set. The method of separating the tobacco from the heating element and then pulling out the cigarette, or turning the cigarette and then pulling out the cigarette after smoking is completed, the operation is cumbersome and the user experience is poor. Distance cannot be precisely controlled.

SUMMARY OF THE INVENTION

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, one of the objectives of the present invention is to provide a low-temperature smoking device capable of precisely controlling the displacement distance of the heating element.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions:

A low-temperature smoking device comprises a casing, a heating cavity for inserting tobacco products is formed in the casing, a heating element and a driving component for driving the heating element to be inserted into or withdrawn from the heating cavity are further arranged in the casing, The drive assembly includes a DC motor, a Hall switch, a screw rod, and a slider sleeved on the outside of the screw rod. The screw rod is connected to the DC motor through a reducer, and the slider is slidably installed on the outside of the screw rod. The slide rail in the casing is connected with the heating body, the DC motor and the Hall switch are electrically connected with the PCB board in the casing, and the output shaft of the DC motor is provided with a synchronous rotation function. A magnetic element for triggering the Hall switch.

Further, the heating chamber includes a first end and a second end, the first end is used for inserting the tobacco product, an elastic cleaning member is matched and fixedly installed in the second end, and an elastic cleaning member is provided on the elastic cleaning member. There is a perforation adapted to the heating body, and the heating body is inserted into the heating cavity through the perforation.

Further, the elastic cleaning member is a modified high temperature resistant silica gel sheet.

Further, the heating body, the heating cavity and the elastic cleaning member are arranged coaxially.

Further, a bracket is also arranged in the shell, and the bracket is divided into the upper heating cavity and the lower sliding cavity by the partition plate in the middle, and the sliding cavity is slidably installed with a fixed connection with the slider. a fixing seat, on which the heating element is fixedly mounted.

Further, the housing includes a bottom cover with an open top and a top cover closed on the bottom cover, the top cover is provided with a cigarette socket communicating with the first end, the drive assembly and the bracket It is clamped and fixed between the top cover and the bottom cover.

Further, the heating body is a heating rod or a heating sheet.

Further, a battery is also arranged in the casing, the battery and the heating body are both electrically connected to the PCB board, and the casing is provided with a control button that is electrically connected to the PCB board.

Compared with the prior art, the present invention has the following advantages:

1. Through the magnetic parts that move synchronously with the motor and the magnetic Hall switch on the control circuit board, the signal of the number of revolutions of the motor is obtained, depending on the number of revolutions of the motor and the transmission ratio value of the gearbox, as well as the value of the screw pitch and the heating element. The relationship between the required displacement distances can accurately drive the linear displacement distance of the heating body, so as to push the heating body to move a specific distance and achieve precise control of the displacement of the heating body.

2. An elastic cleaning element is arranged in the heating chamber of the smoking device, and the heating element can be withdrawn from the heating chamber. During the retreat, the elastic cleaning element and the heating element are always in close contact, and the elastic cleaning element will adhere to the heating element. The residue on the surface is detached to realize self-cleaning of the heating element. In particular, when the retreating stroke of the heating body is greater than or equal to the length of extending into the heating cavity, the complete heating cavity can be exposed, and only a cleaning brush can be used to clean the heating cavity without dead ends.

Description of drawings

Fig. 1 is the front sectional view of embodiment 1;

Fig. 2 is the side sectional view of embodiment 1;

FIG. 3 is a schematic structural diagram of the back-off state of the heating element in Example 1;

FIG. 4 is a schematic structural diagram of the inserted state of the heating element in Example 1;

Fig. 5 is the exploded view of embodiment 1;

FIG. 6 is a schematic structural diagram of Embodiment 2. FIG.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other

The embodiments all belong to the protection scope of the present invention.

Example 1

Referring to Figures 1 and 2, a low-temperature smoking device includes a casing 1, and a heating cavity 3 for inserting tobacco products 2 is formed in the casing 1. The heating cavity 3 includes a first end and a second end, and the first end is used for inserting tobacco The product, the second end is a closed end with a perforation, a heating element 4 and a driving assembly 5 and a control module for driving the heating element 4 to be inserted into or withdrawn from the heating chamber 3 from the perforation are also provided in the casing 1, and the driving element 5 includes a DC The motor 501, the Hall switch 502, the lead screw 503 and the slider 504 sleeved on the outside of the lead screw 503, the lead screw 503 is connected with the DC motor 501 through the reducer 505, and the slider 504 is slidably installed on the slide rail in the housing 1 6 and connected to the heating body 4, the output shaft of the DC motor 501 is provided with a magnetic member 7 that rotates synchronously with it and is used to trigger the Hall switch 502.

Specifically, the control module includes a battery 8 , a control circuit board 9 and a control button 10 . The control circuit board 9 is electrically connected to the battery 8 , the control button 10 , the heating element 4 , the Hall switch 502 and the motor 501 , and the control button 10 is arranged on the on the side wall of the housing 1.

Referring to FIGS. 3 and 4 , in this embodiment, the motor 501 is connected to the control circuit board 9 through a connecting wire, and the motor 501 drives the lead screw 503 to rotate. The block 504 slides along the slide rail 6 , thereby driving the heating body 4 to move axially back and forth, so that the heating body 4 moves backward relative to the heating chamber 3 . Of course, the drive assembly 5 may also adopt other existing linear drive mechanisms such as oil cylinders, air cylinders, etc., which will not be repeated here.

Specifically, a cylindrical sleeve 12 is connected to the shaft of the motor 501 by interference. The cylindrical sleeve 12 is provided with a blind hole at a position offset from the center hole. The magnetic member 7 is fastened and built into the blind hole. The plug-in Hall switch 502 is located between the main body of the motor and the magnetic member 7 on the control circuit board 9, and the distance between the two is spaced under the condition that the cylindrical sleeve 12 and the motor 501 do not encounter when they rotate synchronously. As small as possible, the Hall switch 502 will capture the signal and feed it back to the MCU of the control circuit board when the magnetic element 7 is approaching. Every time the motor rotates one circle, the motor shaft drives the cylindrical sleeve 12 to rotate one circle synchronously. When the element 7 reaches the position facing the Hall switch, the signal captured by the Hall switch 502 is the strongest, and the MCU counts it once. Take the limit distance as an example: the gear ratio of the gearbox is J, the motor speed is n, the screw pitch is P, and the moving limit distance of the heating element is L, then the number of counts required by the Hall switch for the moving limit distance of the heating element is N=L/P* J. According to this formula, the number of rotations of the motor is preset in the software to achieve the precise displacement of the heating body. In order to ensure the accuracy of the displacement, the screw pitch needs to be designed as small as possible, and it is a factor of the limit moving distance L of the heating element. At the same time, when designing the reducer, the transmission ratio J is a factor of the motor speed n.

Referring to FIG. 3 and FIG. 4 , in this embodiment, a cigarette is used as an example to describe the use process of the low-temperature smoking device: when smoking is required, the control circuit board 9 controls the battery 8 to supply power to the motor 501, and the motor 501 rotates forwardly to drive heat. The body 4 moves forward until the MCU records that the number of rotations of the motor 501 reaches the design value, the motor 501 stops rotating, the entire heating part of the heating body 4 is located in the heating chamber 3, insert the cigarette into the heating chamber 3, and the heating body 4 will axially pierce the cigarette Inside the branch, at this time, the circuit control board 9 supplies power to the heating body 4 to heat to ensure the tobacco is baked, which is a smoking state; when the smoking is completed, the motor 501 is reversed, and the control circuit board 9 drives the heating body 4 to retreat until the MCU records that the motor is reversed. When the number of times reaches the design value, the motor stops rotating. At this time, the part of the heating element 4 pierced into the tobacco interior is separated from the tobacco due to retreat, and the baked cigarette is pulled out from the exposed part of the outer casing. The displacement is separated from the tobacco, and when it is pulled out, it will be pulled out completely without resistance, and will not be left in the heating chamber.

In order to facilitate the insertion of the heating element 4 into the cigarette, the heating element 4 may be a heating sheet or a heating rod. Correspondingly, a spiked portion may also be provided at the front end of the heating sheet 4 or the heating rod.

1 and 5, as a preferred solution of the present invention, a bracket 13 is also provided in the casing 1, and the bracket 13 is divided into an upper heating chamber 3 and a lower sliding chamber by the partition plate 11 in the middle. The fixed seat 14 fixedly connected to the slider 503 through the connecting rod is slidably installed, the heating element 4 is fixedly installed on the fixed seat 14, and the perforation of the partition is consistent with the cross section of the heating element 4 and fits with a small gap to ensure that the heating element 4 and the perforation Always on-line. In practical applications, in order to limit the maximum moving distance of the heating element, the motor stall current is used to increase the setting to make up for protection. When the motor rotates forward and the heating element moves forward, the fixed seat and the baffle plane fit together, resulting in stalled rotor and current. When it becomes larger, the MCU sets the motor to power off according to the current change. When the motor is reversed, the heating element is driven to retreat, and the slider is in contact with the bottom end face of the slide rail, a stall occurs and the current increases. The MCU sets the motor to power off according to the current change.

Referring to FIG. 1 , preferably, the housing 1 includes a bottom cover 101 with an open top and a top cover 102 closed on the bottom cover 101 , and the cigarette socket 15 is located on the top cover 102 and communicates with the first end of the heating chamber 3 . The assembly 5 , the control module and the heating body 4 are all located in the bottom cover 101 . The top cover 102 and the bottom cover 101 are correspondingly provided with fixing brackets 16 , and the driving assembly 5 and the bracket 13 are clamped and fixed between the top cover 102 and the bottom cover 101 through the fixing brackets 16 . When the heating element 4 and other components need to be replaced or cleaned, it is only necessary to open the top cover 102 and remove the fixing frame 16 , and then the heating element 4 and other components can be taken out from the bottom cover 101 . After the replacement is completed, the heating element 4 is placed in the bottom cover 101 again, the fixing frame 16 is put on, and the top cover 102 is covered to realize the fixing of various components, and the operation is convenient and quick.

As a preferred solution of the present invention, in order to facilitate the opening of the top cover 102, magnets are provided on the opposite sides of the top cover 102 and the bottom cover 101. After the top cover 102 and the bottom cover 101 are closed, the magnets provided between the magnets The adsorption force realizes adsorption and fixation. Of course, the top cover 102 and the bottom cover 101 can also be fixed by means of snaps, locks, etc., which will not be repeated here.

Example 2

Referring to FIG. 6 , the difference from Embodiment 1 is that the low-temperature smoking device of this embodiment is fixedly provided with an elastic cleaning member 17 in the closed end of the heating cavity, and the elastic cleaning member 17 is provided with a central hole, and the heating segments of the heating element 4 are arranged in sequence. Enter the heating chamber 3 through the perforation and the central hole. During the retreating process of the heating element 4, the elastic cleaning element 17 and the heating element 4 are always in close contact, and the elastic cleaning element 17 will remove the residues attached to the surface of the heating element 4 Detach and realize self-cleaning of the heating element.

The elastic cleaning element 17 is made of soft high temperature resistant non-toxic material, which has a certain elastic deformation ability, such as modified high temperature resistant silica gel. The heating body 4 forms an interference fit to ensure the sealing of the closed end of the heating chamber.

Specifically, a cleaning bracket 18 is also provided in the closed end of the heating cavity 3 , the elastic cleaning member 17 is sandwiched between the cleaning bracket 18 and the closed end of the heating cavity 3 , and the outer ring of the cleaning bracket 18 is in an interference fit with the inner wall of the heating cavity 3 . The elastic cleaning member 17 is axially fixed; wherein, the central hole of the elastic cleaning member 17, the central hole of the cleaning bracket 18, the perforation of the closed end of the heating cavity 3 and the heating body 4 are in a concentric state in the same axial direction, which can ensure the insertion of tobacco products. The smoothness of the heating chamber. The rest of the structures in this embodiment are the same as those in Embodiment 1, and are not repeated here.

The above-mentioned embodiments are only examples to clearly illustrate the present invention, and are not intended to limit the embodiments. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. Neither need nor can all embodiments be exhaustive here. However, the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (9)

1. A low-temperature smoking device, comprising an outer shell, a heating cavity for inserting tobacco products is formed in the outer shell, a heating element and a drive for driving the heating element to be inserted into or withdrawn from the heating cavity are also arranged in the outer shell It is characterized in that: the drive assembly includes a DC motor, a Hall switch, a lead screw, and a slider sleeved on the outside of the lead screw, the lead screw and the DC motor are connected through a speed reducer transmission, and the The slider is slidably installed on the slide rail in the casing and is connected to the heating body, the DC motor and the Hall switch are electrically connected to the PCB board in the casing, and the output shaft of the DC motor is on the There is a magnetic element that rotates synchronously with it for triggering the Hall switch. 2 . The low-temperature smoking device according to claim 1 , wherein the heating cavity comprises a first end and a second end, the first end is used for inserting the tobacco product, and the second end is matched and fixed in the second end. 3 . An elastic cleaning piece is installed, the elastic cleaning piece is provided with a perforation adapted to the heating body, and the heating body is inserted into the heating cavity through the perforation. 3 . The low-temperature smoking device according to claim 2 , wherein the elastic cleaning member is a modified high-temperature resistant silica gel sheet. 4 . 4 . The low-temperature smoking device according to claim 2 , wherein the heating element, the heating cavity and the elastic cleaning member are arranged coaxially. 5 . 5 . The low-temperature smoking device according to claim 2 , wherein a bracket is further arranged in the casing, and the bracket is divided into the upper heating chamber and the lower sliding chamber by the partition in the middle, and the sliding chamber A fixing seat fixedly connected with the sliding block is slidably installed in the cavity, and the heating body is fixedly installed on the fixing seat. 6 . The low-temperature smoking device according to claim 5 , wherein the casing comprises a bottom cover with an open top and a top cover closed on the bottom cover, and the top cover is provided with the first cover and the first cover. 7 . A cigarette socket with communicating ends, the drive assembly and the bracket are clamped and fixed between the top cover and the bottom cover. 7 . The low-temperature smoking device according to claim 6 , wherein the top cover and the bottom cover are magnetically adsorbed and fixed. 8 . 8 . The low-temperature smoking device according to claim 1 , wherein the heating element is a heating rod or a heating sheet. 9 . 9 . The low-temperature smoking device according to claim 1 , wherein a battery is further provided in the casing, the battery and the heating element are both electrically connected to the PCB, and the casing is provided with a The control buttons that are electrically connected to the PCB board.

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