CN114617600A

CN114617600A - Electric stapler

Info

Publication number: CN114617600A
Application number: CN202011453501.7A
Authority: CN
Inventors: 孙宝峰; 孙海盟
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2022-06-14

Abstract

The present invention provides an electric stapler, comprising: a movable cutter assembly; the motor is in transmission connection with the cutting knife assembly; the nail bin seat is provided with a limiting mechanism which is used for limiting the cutting knife assembly at a safety position; the position detection module is used for detecting the position information of the cutter assembly and outputting a detection signal; the control module is electrically connected with the motor and the position detection module and used for judging whether the cutting knife assembly exceeds the safety position or not according to the detection signal of the position detection module and acquiring the working parameter value of the motor and judging whether the working parameter value of the motor meets the preset condition or not so as to control the motor to stop when the cutting knife assembly does not exceed the safety position and the working parameter value of the motor meets the preset condition. The embodiment of the application provides an electric anastomat capable of accurately controlling the optimal protection current and the delay time of the electric anastomat, so that the damage to a human body when a used nail bin is installed or the nail bin is not installed is avoided.

Description

Electric anastomat

Technical Field

The invention relates to an electric anastomat.

Background

As is well known, the endocavity cutting stapler has been commonly used in the abdominal cavity and other intracavitary operations.

The anastomat comprises a motor, a cutter assembly and a jaw assembly, wherein a nail bin assembly is installed in the jaw assembly. The motor drives the cutter component to move, the cutter component moves forwards to push the nail bin component to discharge nails to suture tissues, and meanwhile, the cutter component cuts the tissues when moving forwards. It should be noted that when an unused cartridge is installed in the jaw assembly, the cutting knife is moved forward until it has cut to its full extent. When the used nail bin assembly is installed in the jaw assembly or the nail bin assembly is not installed, the anastomat is in an empty nail bin state and should be identified, so that the percussion is avoided, and the human body is prevented from being injured.

When the nail storehouse subassembly did not adorn the nail storehouse or adorn the nail storehouse that has used among the prior art, when the cutting knife moved forward and cut, this cutting knife will be spacing by mechanical structure and prevented to continue forward motion, and then the motor takes place to block up commentaries on classics, causes the electric current increase. A fuse is connected in series in the main loop of the motor, when the current exceeds the specification of the fuse, the fuse is triggered to be fused, then the motor is stopped, and the cutting knife is prevented from being damaged in the mechanical structure. For example, when the current flowing through the fuse is greater than the predetermined value I0 and reaches the predetermined time t0, the fuse is automatically blown, and I0 and t0 are specification parameters of the fuse. However, the shutdown protection mode is limited by the specification of the fuse, and the fuse matched with the optimal working parameter value of the locked-rotor empty nail bin of the anastomat is difficult to select. Specifically, for example, when the protection current of the selected fuse is large, the shutdown time is likely to be too late, and thus shutdown protection cannot be performed in time. False triggering is likely to occur when the maximum protection current of the selected fuse is small. And the fuse protection delay is too long, and the electronic part and the mechanical structural part of the anastomat are easily damaged in the locked rotor process. If the nail bin is installed, when the nail bin is normally fired, the nail bin is protected to stop due to the action of the fuse when a large load occurs, and firing capacity is affected.

Therefore, there is a need for a powered stapler to overcome the above-mentioned drawbacks.

Disclosure of Invention

In view of this, this application embodiment provides an electronic anastomat that can accurate control working parameter value to avoid installing used nail storehouse or not installing the trigger cutting knife and then avoid damaging the human body when the nail storehouse, and avoid electronic anastomat mistake to shut down.

The above object of the present invention can be achieved by the following technical solutions: an electric stapler, comprising: a movable cutter assembly; the motor is in transmission connection with the cutting knife assembly and is used for driving the cutting knife assembly to move; the nail bin assembly is provided with a channel, and the cutter assembly can move in the channel; a jaw assembly for mounting and supporting the cartridge assembly; the jaw assembly comprises a nail abutting seat and a nail bin seat, the nail bin seat is provided with a first position located at the near end and a safety position located in front of the first position, the nail bin seat is provided with a limiting mechanism, the nail bin assembly is installed in front of the limiting mechanism, and the limiting mechanism is used for limiting the cutting knife assembly at the safety position; the position detection module is used for detecting the position information of the cutter assembly and outputting a detection signal; the control module is used for judging whether the cutter assembly exceeds the insurance position according to the detection signal, acquiring the working parameter value of the motor and judging whether the working parameter value of the motor meets a preset condition, so that the cutter assembly does not exceed the insurance position, and the working parameter value of the motor meets the preset condition, and the motor is controlled to stop.

As a preferred embodiment, the operating parameter value of the motor is a current value; the preset condition is that the current value is greater than or equal to a preset value and reaches a first preset time.

As a preferred embodiment, a limiting portion is disposed on the cutter assembly, and the limiting portion is matched with the limiting mechanism to limit the cutter assembly at the safety position.

In a preferred embodiment, one of the limiting part and the limiting mechanism is a first groove, and the other is a first protrusion.

As a preferred embodiment, the cartridge assembly includes a lifting mechanism, and the lifting mechanism is provided with a matching portion for matching with the front end of the cutter assembly, and the matching portion is matched with the front end of the cutter assembly, so that the cutter assembly can move forward to the safety position through the limiting mechanism.

As a preferred embodiment, when the cutter assembly is located at the safety position, the position detection module sends a first detection signal to the control module, and when the cutter assembly exceeds the safety position, the position detection module sends a second detection signal to the control module; when the signal received by the control module from the position detection module is converted from the first detection signal to the second detection signal, the control module judges that the cutter assembly exceeds the safety position, and when the signal received by the control module from the position detection module is kept as the first detection signal, the control module judges that the cutter assembly does not exceed the safety position.

As a preferred embodiment, the electric stapler further includes: the first transmission mechanism is in transmission connection with the cutting knife assembly; the first transmission mechanism is provided with a first part and drives the cutter assembly and the first part to move synchronously; the first component continuously triggers the position detection module when the cutter assembly does not exceed the safety position, so that the position detection module sends the first detection signal, the first component does not trigger the position detection module when the cutter assembly exceeds the safety position, and the position detection module sends the second detection signal.

As a preferred embodiment, the first member has a strip shape extending lengthwise; when the cutter assembly is located at the first position, the front end of the first component triggers the position detection module; when the cutter assembly is located at the safety position, the rear end of the first component triggers the position detection module.

In a preferred embodiment, the length in the longitudinal extension between the front end and the rear end of the first part is the distance between the securing position and the first position.

In a preferred embodiment, the control module is further configured to turn off the motor when the first member moves backward until the front end of the first member triggers the position detection module.

In a preferred embodiment, when the rear end of the first member triggers the position detection module during the backward movement of the first member, the timing is started, and when a second preset time is reached, the front end of the first member triggers the position detection module.

In a preferred embodiment, the control module is further configured to drive the motor to operate at a first duty cycle according to the condition that the cutter assembly does not exceed the safety position; driving the motor to operate at a second duty cycle when the cutter assembly exceeds the safety position; the second duty cycle is greater than the first duty cycle.

As a preferred embodiment, the cutter assembly is provided with a second component; the second component does not trigger the position detection module when the cutter assembly does not exceed the safety position, the position detection module sends the first detection signal, the second component triggers the position detection module when the cutter assembly exceeds the safety position, and the position detection module sends the second detection signal.

In a preferred embodiment, the position detection module is arranged in front of and in close proximity to the safety position.

The application provides an electronic anastomat's beneficial effect is: the electric anastomat is provided with the movable cutting knife assembly, the motor, the limiting mechanism, the position detection module and the control module, so that when the used nail bin assembly is not installed or installed, the cutting knife assembly moves forwards to cut, the cutting knife assembly is limited in the safety position by the limiting mechanism, and the motor is blocked. The position detection module can detect the position information of the cutter assembly and output a detection signal. The control module judges whether the cutter assembly exceeds the safety position according to a detection signal of the position detection module, acquires a working parameter value of the motor and judges whether the working parameter value of the motor meets a preset condition, and controls the motor to stop when the working parameter value of the motor meets the preset condition and judges that the cutter assembly does not exceed the safety position. So can be through setting for the condition of predetermineeing for at not adorning the nail storehouse subassembly or adorning the nail storehouse subassembly that has used, in time control motor shut down when the cutting knife subassembly is spacing by stop gear. The preset condition can be set according to the optimal working parameter value of the locked rotor of the anastomat, for example, when the current value of the motor is larger than or equal to the preset value and reaches the first preset time and the cutting knife assembly is judged not to exceed the safety position, the control module controls the motor to stop. Therefore, the purpose of accurately controlling the optimal working parameter value of the locked-rotor shutdown of the motor can be achieved. Further, when the cutting knife assembly surpassed the insurance position, the position detection module of the electronic anastomat that this application provided can detect out the positional information of cutting knife assembly, and then control module can judge according to the detected signal of position detection module that the cutting knife assembly surpassed the insurance position does not judge whether the working parameter value of motor satisfies the preset condition, and the control motor normally works. So avoid the cutting knife subassembly when exceeding the insurance position and cutting the tissue, because of uncontrollable factor, for example the current value of motor or other working parameter value increase and the mistake is shut down, and then influence doctor's operation, user experience is poor. Further, this application detects the position information of cutter subassembly through position detection module and output detected signal makes control module judge whether the cutter subassembly exceeds insurance position according to the detected signal of position detection module, can judge the current position of cutter subassembly more accurately, and when cutter subassembly exceeded insurance position, and when the motor took place the stall, can in time shut down. Compared with the prior art, the shutdown of the motor is controlled in a double or multiple mode by mechanical limitation, position detection, motor parameters and the like, and the safety are improved. Furthermore, the control module controls the motor to stop, so that the problem that the electronic part and the mechanical structural part of the anastomat are damaged due to overlong fuse protection delay can be solved. And when the nail bin assembly is installed and normally fired, the protection cannot be stopped due to the action of a fuse when a large load occurs, so that the firing capability is not influenced. Further, this application detects the position information of cutter subassembly and output detecting signal through position detection module and makes control module judge whether the cutter subassembly exceeds insurance position according to the detecting signal of position detection module, if can in time detect out through position detection module when exceeding insurance position, in time shut down. For only adopting stop gear to carry out spacing mode among the prior art, the position detection module and the stop gear simultaneous action of this application can avoid the mistake percussion, have improved the security. Further, this application adopts dual or multiple shut down of controlling the motor such as machinery spacing, position inspection, motor parameter, improves insurance and security. Therefore, the embodiment of the application provides an electric anastomat capable of accurately controlling the optimal protection current and the delay time of the electric anastomat, so that the situation that a used nail bin is installed or the nail bin is not installed, the cutting knife is triggered, and then the human body is prevented from being damaged is avoided.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive efforts.

Fig. 1 is a schematic external structural view of an electric stapler according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the electric stapler according to the embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic diagram of the internal structure of the electric stapler according to another view angle provided by the embodiment of the invention;

FIG. 5 is a schematic diagram of a control circuit of the electric stapler according to the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a powered stapler according to another embodiment of the present invention;

FIG. 7 is an enlarged view of portion B of FIG. 6;

FIG. 8 is a schematic view of the installation of the staple pusher block, the staple cartridge body and the cutter assembly provided by the present invention;

FIG. 9 is a schematic structural view of a staple cartridge body provided by an embodiment of the present invention;

FIG. 10 is a schematic structural view of a staple pushing block provided by an embodiment of the present invention;

FIG. 11 is a schematic structural view of a cutter assembly provided by an embodiment of the present invention;

fig. 12 is an enlarged view of portion C of fig. 11;

FIG. 13 is a schematic view of the present invention providing a configuration in which the cutting knife assembly is in a first position with the unused cartridge assembly installed;

fig. 14 is an enlarged view of portion D of fig. 13;

FIG. 15 is a schematic structural view of an embodiment of the present invention providing a cutting knife assembly in a first position with no cartridge assembly installed or with a used cartridge assembly installed;

fig. 16 is an enlarged view of portion E of fig. 15;

FIG. 17 is a schematic view of a cutting blade assembly being retained by a retaining mechanism according to an embodiment of the present invention;

fig. 18 is an enlarged view of portion F of fig. 17;

FIG. 19 is a schematic diagram of a position detection module detecting positional information of a cutter assembly in accordance with one embodiment of the present invention;

FIG. 20 is a schematic diagram of a position detection module detecting position information of a cutter assembly in accordance with another embodiment of the present invention;

fig. 21 is a schematic diagram of a position detection module for detecting position information of a cutter assembly according to another embodiment of the present invention.

Description of reference numerals:

100. an electric stapler; 80. a motor; 40. a cutter assembly; 90. a control module; 10. an operating component; 20. a shaft assembly; 21. a mandrel; 22. a sleeve; 30. an end effector; 31. a nail magazine base; 32. a nail abutting seat; 41. a cutting knife; 42. pushing the cutter piece; 43. a clamping part; 45. a convex plate; 46. a fitting portion; 47. a lifting mechanism; 49. a limiting part; 50. a limiting mechanism; 51. pushing the nail block; 53. a cutter groove; 55. a compression end; 57. a spring plate; 59. a support portion; 60. a trigger; 73. a third key; 69. a first member; 70. a fourth component; 71. a nail bin body; 77. a third component; 79. an acquisition unit; 81. a control unit; 83. a switch driving unit; 85. a switch unit; 87. a position detection module; 89. a slot; 90' and a circuit board assembly.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, and indirect connections through intervening media, as well as the detailed meanings of the terms as understood by those skilled in the art.

The user of the surgical instrument may be a clinician operating the surgical instrument to perform a procedure during a procedure. The terms "proximal", "posterior" and "distal", "anterior" are used herein with respect to the clinician manipulating the surgical instrument. The terms "proximal" and "posterior" refer to portions that are relatively close to the clinician, and the terms "distal" and "anterior" refer to portions that are relatively far from the clinician. "left" and "right" are referenced to the position of the surgical instrument shown in FIG. 1, e.g., with the end effector on the "left" and the cannula on the "right". The terms "upper" and "lower" are used with reference to the relative positions of the staple holder 32 and the cartridge seat 31 of the end effector, specifically, with the staple holder 32 being "upper" and the cartridge seat 31 being "lower". It will be appreciated that the orientations of "proximal", "rear", "distal", "anterior", "left", "right", "up" and "down" are defined for convenience of description, however, surgical instruments may be used in many orientations and positions and thus these terms are not intended to be limiting and absolute. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The connection in the present invention includes electrical connection and mechanical connection.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, an electric stapler 100 according to an embodiment of the present disclosure includes an operating member 10, a shaft member 20 extending from the operating member 10, and an end effector 30 disposed at one end of the shaft member 20. Powered stapler 100 also includes a transmission mechanism. The transmission mechanism includes a first transmission mechanism and a second transmission mechanism, and the transmission mechanisms are located at the operating assembly 10 and the shaft assembly 20, and the specific positional relationship and functions are as follows.

Further, the operating assembly 10 includes a power module, a motor 80 and the first transmission mechanism described above. The power module provides power to the motor 80. The first transmission mechanism is connected to the motor 80, and when the motor 80 obtains electric energy to work, the motor 80 outputs power to drive the first transmission mechanism to move.

Further, the shaft assembly 20 includes a mandrel 21 and a sleeve 22 sleeved on the mandrel 21, and the shaft assembly 20 belongs to the second transmission mechanism. The first transmission mechanism drives the second transmission mechanism to move.

Further, end effector 30 includes a jaw assembly and a cartridge assembly (not numbered). The jaw assembly comprises a nail bin seat 31 and a nail abutting seat 32 which is pivotally connected with the nail bin seat 31, and a channel for accommodating the nail bin assembly is arranged in the nail bin seat 31. The jaw assembly is used for mounting and supporting the nail bin assembly; the cartridge component is provided with a knife groove 53 for the movement of the cutting knife component 40, the cutting knife component 40 can cut the tissue in the process of moving towards the far end in the knife groove 53, and the staples contained in the cartridge component are pushed to be ejected out to perform anastomosis on the tissue.

The cartridge seat 31 is adapted to operably support a cartridge assembly positioned therein, and the anvil 32 is selectively movable between an open position and a closed position to cooperate with the cartridge seat 31 and the cartridge assembly to clamp or unclamp tissue. One end of the sleeve 22 is connected to the anvil 32 of the end effector 30 and the other end is connected to a first transmission mechanism that drives the sleeve 22 back and forth, with the back movement of the sleeve 22 pivoting the anvil 32 upward to open the end effector 30, i.e., open the jaw assembly of the end effector 30, and the forward movement of the sleeve 21 pivoting the anvil 32 downward to close the end effector 30, i.e., close the jaw assembly of the end effector 30.

Further, as shown in fig. 9, the cartridge assembly includes a cartridge body 71, staples, staple drivers driving the staples, and staple pushing blocks 51 driving the staple drivers. Further, a plurality of through holes are vertically arranged in the staple cartridge body 71 in a penetrating manner, the through holes form a staple cavity, and at least one part of the staple driver and the anastomosis staples are positioned in the staple cavity. The staple pushing block 51 is disposed at the rear end of the staple cartridge body 71. Since at least a portion of the staple drivers are disposed within the staple cavities, the staple cavities define that the staple drivers and staples can only move up and down relative to cartridge body 71. The cartridge body 71 is removably mounted in the channel, which both prevents the staple drivers from disengaging from the cartridge body 71 and enhances the strength of the cartridge body 71. Under the premise that the jaw assembly is closed, the nail pushing block 51 moves from the rear end of the nail bin body 71 to the front end of the nail bin body 71 under the pushing of an external force, and the nail pushing block 51 pushes the nail driver to move upwards in the nail cavity in the moving process, so that the anastomotic nails move upwards, penetrate through the tissue of a patient and suture the wound of the patient until the anastomotic nails are separated from the nail cavity.

Further, the powered stapler 100 also includes a movable cutting knife assembly 40. Further, the cutting blade assembly 40 is configured to cut tissue during the forward movement. Further, the cutter assembly 40 is configured to retract during the rearward movement.

Further, the motor 80 is drivingly connected to the cutting assembly 40 such that the motor 80 can drive the cutting assembly 40 forward for cutting. The drive connection may be such that the motor 80 is capable of driving the cutter assembly 40 through a drive mechanism. Specifically, as shown in fig. 4, the cutter assembly 40 includes a pusher 42 and a cutter 41 detachably mounted to the pusher 42. The magazine body 71 is provided with a channel for the cutting knife assembly 40 to penetrate through, specifically, the channel is a knife slot 53. The knife groove 53 is provided to penetrate through the magazine body 71. The central axis of the knife channel 53 coincides with the central axis of the cartridge assembly. The mandrel 21 has two ends, one end connected to the first transmission mechanism and the other end located within the sleeve 22. A part of the push-knife element 42 is located inside the sleeve 22 and connected to the other end of the mandrel 21, and another part of the push-knife element 42 is detachably connected to the cutting blade 41. The first transmission mechanism can drive the mandrel 21 to move forwards and backwards, when the cartridge component is installed, the mandrel 21 moves forwards to enable the cutting knife component 40 to move forwards, the cutting knife component cuts tissue and pushes staples of the cartridge component out to suture the tissue, and the backward movement of the mandrel 21 enables the cutting knife component 40 to move backwards.

Further, as shown in fig. 11, the pusher member 42 includes an elongated body and a compression end 55 disposed at a distal end of the body. A slot 89 is formed between the compression end 55 and the body. The magazine base 31 is further provided with a spring plate 57, and the spring plate 57 can be inserted into the insertion groove 89 to apply a downward force thereto. As shown in fig. 14, the resilient tab 57 is inserted into the slot 89.

Further, as shown in fig. 12, the cutting blade 41 includes a support portion 59 and a click portion 43. The clamping portion 43 is located at the lower side of the cutting blade 41 and is in an I shape. The upper side of the cutting blade 41 is provided with a support portion 59. The snap-in portion 43 corresponds to the position of the support portion 59. Further, as shown in FIG. 8, a cartridge seat groove is provided on the cartridge seat 31. The nail abutting seat 32 is provided with a nail abutting seat groove. The nail bin base groove is matched with the clamping portion 43, and the nail abutting base groove is matched with the supporting portion, so that a moving channel is respectively provided for the clamping portion 43 and the supporting portion.

The motor 80 clamps the tissue by closing the jaw assembly through the transmission mechanism, then the motor 80 drives the cutter assembly 40 to advance through the transmission mechanism to cut and anastomose the tissue, then the motor 80 drives the cutter assembly 40 to retreat through the transmission mechanism, and finally the motor 80 drives the jaw assembly to open through the transmission mechanism to loosen the tissue, thereby realizing the functions of cutting and anastomosing of the electric anastomat 100.

Further, the operating assembly 10 further comprises a housing comprising, in a positional relationship, a handle housing and a head housing connected to each other, the head housing accommodating at least part of the transmission mechanism, the handle housing being graspable by a user. Of course, in some embodiments, the handle housing may also house a portion of the transmission mechanism. In some embodiments, the handle cavity of the handle housing houses the motor 80, the head cavity of the head housing houses the battery module, the handle cavity is connected to the head cavity, and the first transmission mechanism is located within the head cavity and the handle cavity.

Further, the cartridge seat 31 has a first position located at the proximal end and a safety position located at the front side of the first position, a limiting mechanism 50 is arranged on the cartridge seat 31, the cartridge assembly is mounted in front of the limiting mechanism 50, and the limiting mechanism 50 is used for limiting the cutter assembly 40 at the safety position; a position detection module 87 for detecting position information of the cutter assembly 40 and outputting a detection signal; the control module 90 is electrically connected with the motor 80 and the position detection module 87, and the control module 90 is configured to determine whether the cutting knife assembly 40 exceeds the limiting mechanism 50 according to a detection signal of the position detection module 87, and is configured to acquire a working parameter value of the motor 80 and determine whether the working parameter value of the motor 80 meets a preset condition, so that when the cutting knife assembly 40 does not exceed the safety position and the working parameter value of the motor 80 meets the preset condition, the motor 80 is controlled to stop.

As shown, for example, in fig. 13-16, the cutter assembly 40 is in the first position of the cartridge seat 31. As shown in fig. 17 and 18, the cutter assembly 40 is located in the safety position of the cartridge seat 31. The first position is an initial position in which the cutter assembly 40 moves forward and an extreme position in which the cutter assembly 40 moves backward, that is, an initial position in which the cutter assembly 40 advances and a position in which the cutter is retracted to the bottom. The safety position is an extreme position in which the cutter assembly 40 moves forward when the cartridge assembly is not installed in the cartridge magazine 31 or when a used cartridge assembly is installed. Therefore, the safety position can prevent the cutter assembly 40 from being shot forward to damage a human body when a nail bin assembly is not installed or a used nail bin assembly is installed in the nail bin seat 31. On the other hand, when an unused cartridge assembly is installed in the cartridge seat 31, the cutter assembly 40 can be fired forward beyond the safety position. The technical scheme shows that: the electric stapler 100 according to the embodiment of the present application is provided with a movable cutter assembly 40, a motor 80, a jaw assembly, a limiting mechanism 50, a position detecting module 87 and a control module 90. Therefore, when the used nail bin assembly is installed or not installed, the cutting knife 41 moves forwards to cut, the cutting knife 41 is limited at the safety position by the limiting mechanism 50, and the motor 80 is locked. The position detecting module 87 can detect the position information of the cutter assembly 40 and output a detection signal. The control module 90 determines whether the cutter assembly 40 exceeds the safety position according to the detection signal of the position detection module 87, obtains the working parameter value of the motor 80 and determines whether the working parameter value of the motor 80 meets the preset condition, and controls the motor 80 to stop when the working parameter value of the motor 80 meets the preset condition and the cutter assembly 40 does not exceed the safety position. Therefore, the motor 80 can be controlled to stop in time by setting preset conditions when the nail bin assembly is not installed or used nail bin assemblies are installed. The preset condition may be set according to an optimal working parameter value of the locked rotor of the stapler, for example, when the current value of the motor 80 is greater than or equal to a preset value and reaches a first preset time and it is determined that the cutting knife assembly 40 does not exceed the safety position, the control module 90 controls the motor 80 to stop. Therefore, the purpose of accurately controlling the optimal working parameter value of the locked-rotor shutdown of the motor 80 can be achieved. Further, when the cutter assembly 40 exceeds the safety position, the position detection module 87 of the electric stapler 100 provided by the present application can detect the position information of the cutter assembly 40, and then the control module 9090 can judge that the cutter assembly 40 exceeds the safety position according to the detection signal of the position detection module 87, and does not judge whether the working parameter value of the motor 80 meets the preset condition, and controls the motor 80 to normally work. Therefore, when the cutting knife assembly 40 is prevented from cutting beyond the safety position, the cutting knife assembly is prevented from being stopped by mistake due to uncontrollable factors, such as the increase of the current value or other working parameter values of the motor 80, so that the operation of a doctor is influenced, and the user experience is poor. Further, this application detects the position information of cutter subassembly 40 and output detecting signal through position detection module 87 and makes control module 90 judge whether cutter subassembly 40 surpasses insurance position according to position detection module 87's detecting signal, can judge the current position of cutter subassembly 40 more accurately, and when cutter subassembly 40 surpassed insurance position, and when motor 80 took place the stall, can in time shut down. Compared with the prior art, the shutdown of the motor 80 is controlled by adopting mechanical limitation, position detection, motor 80 parameters and the like in a dual or multiple mode, and the safety are improved. Further, the control module 90 controls the motor 80 to stop, so that the problem that the electronic part and the mechanical structural part of the anastomat are damaged due to overlong fuse protection delay can be avoided. And when the nail bin is installed and the nail bin is normally fired, the protection machine cannot be shut down due to the action of a fuse when a large load occurs, and the firing capability is influenced.

As shown in fig. 10, the staple pushing block 51 has a three-layer structure. Specifically, the staple pushing block 51 includes two cam portions on the outer side and the lifting mechanism 47 between the two cam portions. The lifting mechanism 47 is provided with an engaging portion 46 for engaging with the front end of the cutting blade 41. The front end of the cutter blade 41 is adapted to engage with an engagement portion 46 of a lifting mechanism 47 to enable the cutter assembly 40 to move past the stop mechanism forward of the safety position. As shown in fig. 12, for example, the front end of the cutter blade 41 is provided with a projection plate 45. The protruding plate 45 is adapted to engage with an engaging portion 46 on a lifting mechanism 47. For example, as shown in fig. 10, the lifting mechanism 47 has a plate shape. The engaging portion 46 is a bent portion that is provided in the lifting mechanism 47 and bent substantially in an L-shape. The bent portion can be fitted with the convex plate 45. Of course, the engaging portion 46 is not limited to a bent portion provided in the lifting mechanism 47 and bent substantially in an L shape. Other configurations are possible, for example, where the engagement portion 46 is an opening provided in the lifting mechanism 47. The opening can be used for the protruding plate 45 to extend into, and further cooperate with the protruding plate 45 to limit the downward movement of the protruding plate 45. Further, the lifting mechanism 47 is fixedly connected with the two cam portions, so that the nail pushing block 51 can drive the lifting mechanism 47 to move from the rear end of the nail bin body 71 to the front end of the nail bin body 71. So that when a used cartridge assembly is installed in cartridge holder 31, as shown in FIGS. 15 and 16, the used cartridge assembly raising mechanism 47 has moved distally of the cartridge assembly; the proximal end of the used cartridge assembly is no longer provided with a lifting mechanism 47.

Further, as shown in fig. 5, the operating assembly 10 further includes a trigger 60 and a control module 90, which are respectively connected to the power module to obtain power operation. The control module 90 is a circuit board assembly 90' and includes an acquisition unit 79, a control unit 81, a switch driving unit 88, and a switch unit 85. The trigger 60 and the position detection module 87 are electrically connected to the obtaining unit 79, the obtaining unit 79 is electrically connected to the control unit 81, the control unit 81 is electrically connected to the switch driving unit 88, and the switch driving unit 88 is electrically connected to the switch unit 85. The acquiring unit 79 detects the state of the trigger 60 on one hand, transmits a signal to the control unit 81 when triggered, and the control unit 81 analyzes and processes the signal and then controls the electric anastomat 100; on the other hand, a detection signal output by the position detection module 87 is obtained, and whether the cutter assembly 40 exceeds the safety position is judged according to the detection signal; when the safety position is judged to be exceeded, a signal is also transmitted to the control unit 81, the control unit 81 analyzes and processes the signal, and then the electric anastomat 100 is controlled; when it is determined that the safety position is not exceeded, a signal is also transmitted to the control unit 81, and the control unit 81 analyzes the signal and then performs control of the electric stapler 100.

Further, when the control unit 81 receives a signal for controlling the motor 80 from the trigger 60 or generates a signal for controlling the motor 80 according to a detection signal output from the position detection module 87, the control unit 81 generates a corresponding PWM signal of a low voltage to the switch driving unit 88, and the switch driving unit 88 converts the input PWM signal of the low voltage into a PWM signal of a high voltage available to the switch unit 85 and outputs the PWM signal of the high voltage to the switch unit 85, thereby controlling the on/off of the switch unit 85. The power module is connected with two ends of the motor 80 through the switch unit 85, and the on-off frequency of the switch unit 85 determines the power supply or the power failure of the power module to the motor 80, so that the running state of the motor 80, namely the rotating speed and the direction of the motor 80, is determined. In this embodiment, the switch unit 85 includes 4 Mos switches forming an H-bridge, the on/off of the Mos switches of the H-bridge determines whether the power module supplies power to or cuts off power to the motor 80, and the switch driving unit 88 is an Mos driving chip. And, the design of the H-bridge is such that the control unit 81 can control the H-bridge to realize the forward rotation or reverse rotation of the motor 80. It should be noted that the H-bridge control and the forward/reverse rotation control of the motor 80 are both performed in the prior art, and are not described in detail. The control unit 81 is a microcontroller chip.

Further, the motor 80 of the trigger 60 controls the trigger to include a firing switch that is manually activated by a user for controlling the motor 80 to start and stop. The trigger switch has buttons for user operation, including depressing the button, which triggers the trigger switch, which inputs an electrical signal to the control unit 81 via the acquisition unit 79. The button corresponding to the trigger switch is the third button 73. In this embodiment, the trigger switch is a normally open switch, and the control module 90 controls the running state, i.e., starting or stopping, of the motor 80 according to the trigger state of the trigger switch. The trigger state includes triggered and not triggered. When the normally open switch is triggered, the normally open switch is switched to a closed state to generate a low potential signal, the control unit 81 of the control module 90 obtains the low potential signal to control the motor 80 to start, the low potential signal is continuously obtained to indicate that the switch is continuously triggered, when the normally open switch is not triggered, the normally open switch is in an open state to generate a high level, the control unit 81 of the control module 90 obtains the high level signal to control the motor 80 to stop.

Therefore, when the user operates the third button 73 to trigger the trigger switch, the control unit 81 controls the motor 80 to operate to drive the cutter assembly 40 to perform the cutting operation, and during the cutting operation, the operation of the third button 73 is stopped, the trigger switch is not triggered, and the control unit 81 controls the motor 80 to stop.

Further, the cartridge assembly is mounted in front of the stop mechanism 50. Specifically, cartridge seat 31 has a front end and a rear end, the cartridge assembly is closer to the front end of cartridge seat 31 relative to stop mechanism 50. The limiting mechanism 50 is used for limiting the cutter assembly 40 at a safety position. Further, a limiting portion 49 is disposed on the cutter assembly 40. The limiting portion 49 cooperates with the limiting mechanism 50 to limit the cutter assembly 40 at a safety position. Specifically, one of the limiting portion 49 and the limiting mechanism 50 is a first groove, and the other is a first protrusion. For example, as shown in fig. 13-18, the limiting mechanism 50 is a first groove disposed on the cartridge seat 31. Further, the limiting portion 49 is a first protrusion disposed on the cutting blade 41. The first projection is located below the raised plate 45. The first groove is used for the first protrusion to be inserted into and limit the forward movement of the cutter assembly 40; therefore, when a used nail box assembly or an uninstalled nail box assembly is installed on the nail box seat 31, the lifting mechanism 47 on the used nail box assembly is arranged at the far end of the nail box seat 31, and the nail box assembly is not installed with the lifting mechanism 47, so that the actuation of the motor 80 to the cutter assembly 40 can be mechanically prevented through the limiting mechanism 50, and the forward movement of the cutter assembly 40 is further limited. Further, as shown in fig. 17 and 18, the front end of the first recess is a safety position. That is, when the first protrusion is inserted into the first groove and abuts against the front end of the first groove, the first protrusion cannot move forward continuously and is limited at the front end of the first groove.

Further, as shown in FIGS. 15 and 16, when a used cartridge assembly is mounted on cartridge seat 31, the lifting mechanism 47 of the cartridge assembly is pushed away from its proximal end, so that there is no lifting mechanism 47 at the proximal end. When the cutting knife 41 moves forward, the cutting knife 41 moves downward under the action of the elastic sheet 57, so that the first protrusion falls into the first groove, the first protrusion abuts against the front end of the first groove, and the cutting knife 41 is blocked to prevent the cutting knife 41 from moving forward. As shown in fig. 15 and 16, when the cartridge module is not mounted on the cartridge seat 31, the lifting mechanism 47 is not disposed in the nail abutting seat 32, and the first protrusion will fall into the first groove. As shown in FIGS. 13 and 14, when an unused cartridge assembly is mounted on the moving track of the anvil 32, the proximal end of the unused cartridge assembly abuts against the safety position and the lift mechanism 47 abuts against the safety position. When the cutting knife 41 is at the first position, the lifting mechanism 47 upwards supports against the convex plate 45 of the cutting knife 41, and the downward force applied to the cutting knife 41 by the elastic sheet 57 is resisted, so that the first protrusion cannot fall into the first groove, the cutting knife 41 is lifted, and then the first groove can be smoothly scratched, and the forward movement can be continued, namely, the lifting mechanism 47 can enable the cutting knife assembly 40 to smoothly move towards the front of the safety position through the limiting mechanism 50.

Further, the electric stapler 100 further includes a position detection module 87 for detecting the position information of the cutting knife assembly 40 and outputting a detection signal. Further, the control module 90 is electrically connected to the motor 80 and the position detection module 87, and the control module 90 is configured to determine whether the cutting knife assembly 40 exceeds the safety position according to the detection signal of the position detection module 87, and is configured to obtain an operating parameter value of the motor 80 and determine whether the operating parameter value of the motor 80 meets a preset condition, so that when the cutting knife assembly 40 does not exceed the safety position, and when the operating parameter value of the motor 80 meets the preset condition, the motor 80 is controlled to stop.

In one embodiment, the operating parameter value of the motor 80 is a current value; the preset condition is that the current value is greater than or equal to a preset value and reaches a first preset time. Specifically, when the cutting blade assembly 40 does not exceed the safety position, the control module 90 controls the motor 80 to stop according to the current of the motor 80 being greater than or equal to the preset value and reaching the first preset time. The current value of the motor 80 is greater than or equal to the preset value and the first preset time is reached when the current of the motor 80 is greater than or equal to the preset value and the current of the motor 80 lasts for the first preset time on the premise that the current is greater than or equal to the preset value. For example, the preset value ranges from 1A to 2.5A. Preferably, the preset value is 1.5A. The first preset time is greater than 0.2 seconds. Preferably, the first preset time is 0.3 seconds. That is, it is preferable that the current of the motor 80 is 1.5A or more and the current of the motor 80 is continued for 0.3 seconds on the premise of 1.5A or more.

Further, the applicant has found that the current of the motor 80 can be varied in three stages after the user activates the trigger switch: the first stage is the initial stage of triggering the trigger switch. In the first phase, the current or torque of the electric motor 80 increases gradually from 0 until a first peak is reached and decreases over a first time. The second stage is a stage in which the cutter 41 is stopped by the stopper mechanism 50. In a second phase, in which the motor 80 is stalled, the current or torque of the motor 80 is gradually increased until it reaches a second peak value and lasts for a first predetermined time. The third stage is a stage in which the cutting blade 41 is beyond the safety position and moved forward. The current or torque of the motor 80 in the third phase can reach the second peak value even more and last for the first preset time even more.

Further, in order to enable the control module 90 to distinguish whether the current of the motor 80 is in the third phase or the second phase, the present application provides the position detection module 87. When the position detecting module 87 detects the position information of the cutter assembly 40 and outputs a detection signal, the control module 90 can determine whether the cutter assembly 40 exceeds the safety position according to the detection signal of the position detecting module 87. When the control module 90 determines that the cutter assembly 40 does not exceed the safety position, the current of the motor 80 is obtained at the second stage or the first stage. When the control module 90 determines that the cutter assembly 40 exceeds the safety position, the current of the motor 80 is obtained at the third stage. In order to allow the control module 90 to distinguish whether the current of the motor 80 is in the second phase or the first phase, the present application sets a preset value and a first preset time. Specifically, the first peak may be larger than the second peak in the first and second stages. And the first preset time may be greater than the first time. For example, the first peak of the current may be 2.5A. The second peak value of the current may be 1.5A. The first time may be 0.1 seconds. And the first preset time may be 0.3 seconds. In the first stage, the first peak value 2.5 is greater than the preset value, the duration is 0.1s, in the second stage, the second peak value 1.5 is greater than the preset value, and the duration is 0.3s, although the peak values of the electric quantity in the first stage and the second stage reach the preset value, the duration of the first stage is shorter than that in the second stage, so the preset value can be set through the first peak value and the second peak value, the first preset time can be set according to the first time, and the first stage or the second stage can be accurately identified through the preset value and the first preset time.

In another embodiment, the operating parameter value of the motor 80 is a torque value. The preset condition is that the torque value is greater than or equal to a preset torque value and reaches a first preset time. Specifically, the control module 90 controls the motor 80 to stop when the cutting blade assembly 40 does not exceed the safety position, based on the torque value of the motor 80 being greater than or equal to the predetermined value and reaching a first predetermined time. The torque value of the motor 80 being greater than or equal to the predetermined torque value and reaching the first predetermined time may be that the torque value of the motor 80 being greater than or equal to the predetermined torque value and the torque value of the motor 80 continuing for the first predetermined time on the premise that the torque value is greater than or equal to the predetermined torque value. The predetermined torque value is the locked-rotor torque of the motor 80.

In another embodiment, the value of the operating parameter of the motor 80 is a rotational speed value. The preset condition is that the rotation speed value is not greater than the preset rotation speed within the limited time after the motor 80 is started. Specifically, the control module 90 controls the motor 80 to stop when the cutting blade assembly 40 does not exceed the safety position and the rotation speed value of the motor 80 is not greater than the predetermined rotation speed within the limited time after the motor 80 is started. The predetermined rotational speed is the locked-rotor rotational speed of the motor 80.

Further, when the cutter assembly 40 is located at the safety position, the position detection module 87 sends a first detection signal to the control module 90. The first detection signal may be, for example, 1. Of course, the first detection signal is not limited to 1, but may be 0, and the present application does not limit this. Further, when the cutter assembly 40 exceeds the safety position, the position detection module 87 sends a second detection signal to the control module 90. The second detection signal may be, for example, 1. Of course, the second detection signal is not limited to 1, but may be 0, and the present application does not limit the second detection signal. The second detection signal is different from the first detection signal. For example, when the first detection signal is 1, the second detection signal is 0. When the first detection signal is 0, the second detection signal is 1. Further, when the signal received by the control module 90 from the position detecting module 87 is converted from the first detecting signal to the second detecting signal, it is determined that the cutter assembly 40 exceeds the safety position. For example, when the control module 90 receives a signal from the position detection module 87 that the signal is 0 from 1, it is determined that the cutter assembly 40 exceeds the safety position. Further, when the signal received by the control module 90 from the position detecting module 87 is not converted from the first detecting signal to the second detecting signal, it is determined that the cutter assembly 40 does not exceed the safety position. That is, when the signal received by the control module 90 from the position detecting module 87 is maintained as the first detecting signal or the second detecting signal is converted into the first detecting signal, it is determined that the cutter assembly 40 does not exceed the safety position. For example, when the first detection signal is 1 and the second detection signal is 0, and when the signal received by the control module 90 from the position detection module 87 is 1 continuously or changes from 0 to 1, it is determined that the cutter assembly 40 does not exceed the safety position.

In one embodiment, a first member 69 is provided on the first transmission mechanism. As shown in fig. 2, 3, 6, 7, and 19, for example, the first member 69 has a strip shape extending lengthwise. Specifically, as shown in fig. 3, the first member 69 may be a strip-shaped second protrusion. Specifically, as shown in fig. 7, the first member 69 may be a second groove having a strip shape. Further, the first transmission mechanism can move the cutter assembly 40 and the first member 69 synchronously. Specifically, the first member 69 is disposed above the rack of the first transmission mechanism. I.e. the first part 69 is located within the travel of the rack. The rack drives the cutter assembly 40 to move forward and backward, and further drives the first member 69 to move forward and backward.

Further, the first member 69 continues to trigger the position detection module 87 when the cutting blade assembly 40 has not exceeded the safety position. Specifically, the first transmission mechanism can drive the first member 69 to move forward along the lengthwise extending direction; so that the position detection module 87 can be moved relative to the first part 69 and thus be continuously triggered. For example, as shown in fig. 2, 3, 6, 7, and 19, the longitudinal direction is the front-rear direction. When the cutter assembly 40 is in the first position, the front end of the first member 69 now triggers the position detection module 87. When the cutter assembly 40 is in the safety position, the rear end of the first member 69 now triggers the position detection module 87. Further, the front and rear ends of the first member 69 are the front and rear ends of the first member 69 in the direction in which the longitudinal direction extends. Further, the first member 69 continues to trigger the position detection module 87 when the cutting blade assembly 40 does not exceed the safety position, and the position detection module 87 emits the first detection signal. The first element 69 does not trigger the position detection module 87 when the cutter assembly 40 exceeds the safety position, and the position detection module 87 emits a second detection signal. For example, as shown in fig. 19, when the firing is not started, the front end of the first member 69 triggers the position detection module 87 to start firing, the first transmission mechanism drives the cutter assembly 40 through the mandrel 21 to move the first member 69 forward, the position detection module 87 slides relatively on the first member 69 toward the rear end, the sliding first member 69 is kept in contact with the position detection module 87 to trigger the position detection module 87, so that the position detection module 87 continuously sends out the first detection signal until the position detection module 87 moves to the rear end of the first member 69, and the rear end of the first member 69 is in contact with the position detection module 87, so that the cutter assembly 40 is located at the safety position. If a normal cartridge assembly is installed instead of a used cartridge assembly or an unmounted cartridge assembly in cartridge seat 31, motor 80 continues to drive cutter assembly 40 forward. And when the motor 80 continues to drive the cutter assembly 40 forward beyond the safety position, the first member 69 disengages from the position detection module 87, and the position detection module 87 sends out a second detection signal. Thus, the position detecting module 87 continuously sends out the first detecting signal when the cutter assembly 40 does not exceed the safety position. The position detection module 87 transitions from the first detection signal to the second detection signal when the cutter assembly 40 exceeds the safety position. Further, the length between the front and rear ends of the first member 69 is the distance between the fail-safe position and the first position. For example, the distance between the securing position and the first position is 20mm, and the length of the first member 69 between the front end and the rear end in the longitudinal extension direction is 20 mm. Further, the position detection module 87 includes a travel switch and a photosensor.

Further, the control module 90 is also configured to turn off the motor 80 when the first member 69 moves rearward until the front end of the first member 69 triggers the position detection module 87. Specifically, when the rear end of the first member 69 triggers the position detection module 87 during the backward movement of the first member 69, the timing is started, and when the second preset time is reached, the front end of the first member 69 triggers the position detection module 87. More specifically, when the cutter assembly 40 is in the bottom-feed state, the first member 69 does not trigger the position detection module 87, and the position detection module 87 issues the second detection signal. When the first transmission mechanism moves the cutter assembly 40 rearward, the first member 69 moves rearward. As the first member 69 moves backward, the rear end of the first member 69 first contacts the position detection module 87 and triggers the position detection module 87, the signal sent by the position detection module 87 is converted from the second detection signal to the first detection signal, and the control module 90 starts timing when the second detection signal is converted to the first detection signal until the first member 69 moves for a second preset time and then turns off the motor 80. That is, when the first member 69 moves for a second predetermined time and the front end thereof contacts the position detecting module 87, the cutter assembly 40 is located at the first position where the cutter is retracted to the bottom, and the motor 80 is turned off. The second preset time is a pre-calculated time for the motor 80 to operate at a predetermined duty ratio, e.g., 100%, relative to the time from the front end to the rear end of the first member 69, and is stored in the control unit 81.

In another embodiment, as shown in fig. 21, a third member 77 is provided on the first transmission mechanism. Further, the first transmission mechanism can move the cutter assembly 40 and the third member 77 synchronously. The third member 77 continues to trigger the position detection module 87 when the cutting blade assembly 40 has not exceeded the safety position. Specifically, the first transmission mechanism can drive the third component 77 to move forward; the third member 77 moves distally from the proximal end of the position detection module 87, thereby continuously triggering the position detection module 87. When the cutter assembly 40 is in the first position, the third member 77 triggers the rear end of the position detection module 87. The third member 77 triggers the front end of the position detection module 87 when the cutter assembly 40 is in the safety position. Further, the third member 77 continues the position detection module 87 when the cutting blade assembly 40 does not exceed the safety position, and the position detection module 87 issues the first detection signal. The third component 77 does not trigger the position detection module 87 when the cutter assembly 40 exceeds the safety position, and the position detection module 87 emits a second detection signal. Specifically, the third member 77 is disposed above the rack of the first transmission mechanism. I.e. the third member 77 is located within the travel of the rack. The rack drives the cutter assembly 40 to move forward and backward, and further drives the third member 77 to move forward and backward. Further, the position detection module 87 includes a thin film position sensor.

In another embodiment, the position detection module 87 is located in front of the first position. Specifically, the position detection module 87 is disposed within the jaw assembly. More specifically, the position detection module 87 is disposed at a safety position within the jaw. Preferably, the position sensor is arranged in front of and in close proximity to the safety position, so that the position detection module 87 can be triggered as soon as the cutting blade 41 has passed the safety position.

Further, a second component is provided on the cutter assembly 40. When the position detection module 87 is disposed in front of and immediately adjacent to the safety position within the jaw opening, the second member does not trigger the position detection module 87 when the cutting blade assembly 40 does not exceed the safety position, and the position detection module 87 issues a first detection signal. The second component triggers the position detection module 87 when the cutter assembly 40 exceeds the safety position, and the position sensor sends a second detection signal. Specifically, when the cutter assembly 40 is positioned between the safety position and the first position, the second component does not trigger the position detection module 87, such that the position detection module 87 emits the first detection signal. When the cutter assembly 40 reaches the safety position, the second component does not trigger the position detection module 87, so that the position detection module 87 emits the first detection signal. When the cutter assembly 40 exceeds the safety position, the second component triggers the position detection module 87, so that the position detection module 87 emits the second detection signal, so that when the cutter assembly 40 exceeds the safety position, the position detection module 87 is converted from the first detection signal to the second detection signal. Therefore, when the position detection module 87 is triggered, the cutting knife 41 is shown to smoothly exceed the safety position, the magazine assembly is a normal magazine, and the firing can be continued, and when the position detection module 87 is not triggered all the time, the cutting knife 41 is shown not to exceed the safety position. Further, the second member may be constituted by a front end of the cutter 41. Further, the position detection module 87 includes a micro switch or a photo sensor or a flexible position sensor.

In another embodiment, as shown in FIG. 20, the position detection module 87 is located in a relatively safe position. The relative safe position may be a position at which the position detection module is triggered when the cutter assembly 40 is in the safe position.

Further, a fourth component 70 is provided on the first transmission mechanism. The fourth component 70 triggers the position detection module when the cutter assembly 40 reaches the safety position, and the position detection module sends out a first detection signal. The fourth component 70 does not trigger the position detection module when the cutter assembly 40 exceeds the safety position, and the position detection module sends out a second detection signal. Specifically, when the cutter assembly 40 is positioned between the safety position and the first position, the fourth component 70 does not trigger the position detection module, such that the position detection module emits the second detection signal. When the cutter assembly 40 reaches the safety position, the fourth component 70 triggers the position detection module, so that the position detection module emits a first detection signal. When the cutter assembly 40 exceeds the safety position, the fourth component 70 does not trigger the position detection module, so that the position detection module emits the second detection signal. Such that the position detection module transitions from the first detection signal to the second detection signal when the cutter assembly 40 exceeds the safety position. Therefore, when the position detection module is triggered, the cutting knife 41 is shown to smoothly exceed the safety position, the staple cartridge component is a normal staple cartridge, and can be continuously triggered, and when the position detection module is not triggered all the time, the cutting knife 41 is shown not to exceed the safety position. Further, the bit position detection module includes a micro switch or a photosensor.

In another embodiment, the position detection module 87 is located immediately in front of and immediately adjacent to the relative insurance position. Further, a fifth component is arranged on the first transmission mechanism. The fifth component does not trigger the position detection module 87 when the cutting blade assembly 40 does not exceed the safety position, and the position detection module 87 emits the first detection signal. The fifth component triggers the position detection module 87 when the cutter assembly 40 exceeds the safety position, and the position detection module 87 sends out a second detection signal. The relative safety position may be when the cutter assembly 40 is in the safety position and the fifth component triggers the position detection module 87.

Specifically, when the cutter assembly 40 is positioned between the safety position and the first position, the fifth component does not trigger the position detection module 87, such that the position detection module 87 emits the first detection signal. When the cutter assembly 40 reaches the safety position, the fifth component does not trigger the position detection module 87, so that the position detection module 87 emits the first detection signal. The fifth component triggers the position detection module 87 when the cutter assembly 40 exceeds the safety position, causing the position detection module 87 to emit a second detection signal, such that the signal output by the position detection module 87 transitions from the first detection signal to the second detection signal when the cutter assembly 40 exceeds the safety position. Thus, when the position detecting module 87 is triggered, it indicates that the cutting knife 41 smoothly exceeds the safety position, the magazine assembly is a new magazine assembly, and the firing can be continued, and when the position detecting module 87 is not triggered all the time, it indicates that the cutting knife 41 does not exceed the safety position. Further, the position detection module 87 includes a micro switch or a photo sensor or a flexible position sensor.

Further, in order to prevent the cutting knife assembly from being limited by the limiting mechanism 50 when the user incorrectly installs the nail bin assembly, the motor 80 is started at full speed to break the cutting knife assembly, and further surgical accidents are caused; in the prior art, before the cutter assembly 40 does not pass through the safety position, a power resistor is connected with the motor 80 in series to achieve the purpose of reducing the rotating speed and the torque of the motor 80. After the cutter assembly 40 passes through the safety position, the series connection of the resistor and the motor 80 is disconnected through the switch, so that the battery voltage is directly loaded at two ends of the motor 80, and the limitation of the rotating speed and the torque is removed. However, in this method, since the power resistor is directly connected in series with the motor 80, the excess energy is consumed by heating through the resistor, and a heat sink needs to be separately designed, and the heating is severe to a certain extent, which may cause failure of surrounding components or the resistor itself. And the space occupied by the radiating fin and the resistor is large, which is not beneficial to the miniaturization design of the product. In order to solve the problems existing in the prior art, the motor 80 is driven by different duty ratios according to whether the cutter assembly 40 passes through the safety position, specifically, the control module 90 is further configured to drive the motor 80 to operate at a first duty ratio according to whether the cutter assembly 40 does not exceed the safety position; the motor 80 is driven to operate at the second duty cycle when the cutter assembly 40 exceeds the safety position; the second duty cycle is greater than the first duty cycle. Thus, when the cutter assembly 40 does not pass through the safety position, the control module 90 drives the motor 80 to operate at a low duty ratio, so as to achieve the purposes of reducing the voltage at the two ends of the motor 80 and reducing the torque. Further, when the cutter assembly 40 passes the safety position, the control module 90 drives the motor 80 to operate at full speed, providing a high cutting torque. That is, the control module 90 of the present application is shut down with low current protection before the cutter assembly 40 passes the safety position; after the cutter assembly 40 passes through the safety position, the high-current protection is stopped or cancelled, and the striking force of the cutter 41 is ensured.

Further, the control module 90 is also configured to drive the motor 80 to operate at a second duty cycle when the cutting assembly 40 is moved rearward. This allows the motor 80 to travel at a higher speed as the cutter assembly 40 moves rearward.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are all described in a progressive manner, and each embodiment focuses on differences from other embodiments, and portions that are the same and similar between the embodiments may be referred to each other. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. An electric stapler, characterized in that it comprises:

a movable cutter assembly;

the motor is in transmission connection with the cutting knife assembly and is used for driving the cutting knife assembly to move;

the nail bin assembly is provided with a channel, and the cutter assembly can move in the channel;

a jaw assembly for mounting and supporting the cartridge assembly; the jaw assembly comprises a nail abutting seat and a nail bin seat, the nail bin seat is provided with a first position located at the near end and a safety position located in front of the first position, the nail bin seat is provided with a limiting mechanism, the nail bin assembly is installed in front of the limiting mechanism, and the limiting mechanism is used for limiting the cutting knife assembly at the safety position;

the position detection module is used for detecting the position information of the cutter assembly and outputting a detection signal;

the control module is used for judging whether the cutter assembly exceeds the insurance position according to the detection signal, acquiring the working parameter value of the motor and judging whether the working parameter value of the motor meets a preset condition, so that the cutter assembly does not exceed the insurance position, and the working parameter value of the motor meets the preset condition, and the motor is controlled to stop.

2. The electric stapler according to claim 1, wherein the operating parameter value of the motor is a current value; the preset condition is that the current value is greater than or equal to a preset value and reaches a first preset time.

3. The electric stapler according to claim 1, wherein the cutter assembly is provided with a position-limiting portion, and the position-limiting portion is matched with the position-limiting mechanism to limit the cutter assembly at the safety position.

4. The electric stapler according to claim 3, wherein one of the limiting portion and the limiting mechanism is a first groove, and the other is a first protrusion.

5. The electric stapler according to claim 1, wherein the cartridge assembly comprises a lifting mechanism, the lifting mechanism is provided with an engaging portion for engaging with a front end of the cutter assembly, and the engaging portion engages with a front end of the cutter assembly, so that the cutter assembly can move forward to the safety position through the limiting mechanism.

6. The electric stapler according to claim 1, wherein the position detecting module sends a first detecting signal to the control module when the cutter assembly is located at the safety position, and the position detecting module sends a second detecting signal to the control module when the cutter assembly exceeds the safety position; when the signal received by the control module from the position detection module is converted from the first detection signal to the second detection signal, the control module judges that the cutter assembly exceeds the safety position, and when the signal received by the control module from the position detection module is kept as the first detection signal, the control module judges that the cutter assembly does not exceed the safety position.

7. The powered stapler of claim 6, further comprising: the first transmission mechanism is in transmission connection with the cutting knife assembly; the first transmission mechanism is provided with a first part and drives the cutter assembly and the first part to move synchronously; the first component continuously triggers the position detection module when the cutter assembly does not exceed the safety position, so that the position detection module sends the first detection signal, the first component does not trigger the position detection module when the cutter assembly exceeds the safety position, and the position detection module sends the second detection signal.

8. The powered stapler of claim 7, wherein the first member is in the form of a longitudinally extending strip; when the cutter assembly is located at the first position, the front end of the first component triggers the position detection module; when the cutter assembly is located at the safety position, the rear end of the first component triggers the position detection module.

9. The powered stapler of claim 8, wherein a length along the lengthwise extension between the front end and the rear end of the first member is a distance between the safety position and the first position.

10. The powered stapler of claim 7, wherein the control module is further configured to turn off the motor when the first member moves rearward until the front end of the first member triggers the position detection module.

11. The electric stapler according to claim 10, wherein in the backward movement of the first member, when the rear end of the first member triggers the position detection module, a time is started, and when a second preset time is reached, the front end of the first member triggers the position detection module.

12. The electric stapler of claim 6, wherein the control module is further configured to drive the motor to operate at a first duty cycle based on the cutter assembly not exceeding the safety position; driving the motor to operate at a second duty cycle when the cutter assembly exceeds the safety position; the second duty cycle is greater than the first duty cycle.

13. The powered stapler of claim 6, wherein a second component is disposed on the cutter assembly; the second component does not trigger the position detection module when the cutter assembly does not exceed the safety position, the position detection module sends the first detection signal, the second component triggers the position detection module when the cutter assembly exceeds the safety position, and the position detection module sends the second detection signal.

14. The powered stapler of claim 13, wherein the position detection module is disposed immediately in front of and immediately adjacent to the safety position.