Anastomat with percussion confirmation mechanism

Abstract

The anastomat with the percussion confirmation mechanism comprises a shell assembly, a rack assembly and the percussion confirmation mechanism, the shell assembly comprises a shell and a trigger, the shell comprises a handle, an installation space is formed in the shell, the trigger is connected to the shell in a pivoted mode through a first installation portion of the trigger, and the trigger is provided with a first position close to the handle; the second position is far away from the handle; the rack assembly is installed in the installation space and comprises a rack capable of moving in the length direction of the rack, and a blocking wall is formed at one end of the rack. The triggering confirmation mechanism comprises a safety button and a safety lock structure, the safety button is installed on the shell and extends into the installation space, the safety lock structure is connected to the first installation part and comprises a safety lock plate, and the safety lock plate is provided with a locking position which abuts against the blocking wall to prevent the trigger from moving towards the second position; and the unlocking position is driven by the safety button to be separated from the retaining wall. The anastomat needs to be confirmed before percussion, so that mistaken percussion is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a stapler with a firing confirmation mechanism. Background Art

[0002] A stapler is a device used in medicine to replace manual suturing. Its main working principle is to use titanium staples to sever or anastomose tissues, similar to a stapler. In the prior art, a common stapler can perform a firing operation at any time after the front jaws clamp the position to be processed, which may lead to accidental firing when the contact position is not ideal and needs to be adjusted.

[0003] Therefore, in view of the above technical problems, it is necessary to provide a firing confirmation mechanism on the stapler to solve the above problems.

[0004] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of implication that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a confirmation mechanism for solving the problem of accidental firing of the stapler.

[0006] To achieve the above purpose, the technical solution provided by a specific embodiment of the present utility model is as follows:

[0007] The present utility model provides a stapler with a firing confirmation mechanism, including a housing assembly, a rack assembly, and a firing confirmation mechanism. The housing assembly includes a housing and a trigger. The housing includes a handle and has an installation space formed inside. The trigger is pivotally connected to the housing through its first installation portion, and the trigger has a first position close to the handle and a second position away from the handle. The rack assembly is installed in the installation space and includes a rack that can move along its own length direction. One end of the rack forms a stop wall. The firing confirmation mechanism includes a safety button and a safety lock structure. The safety button is installed on the housing and extends into the installation space. The safety lock structure is connected to the first installation portion and includes a safety lock piece. The safety lock piece has a locking position where it abuts against the stop wall to block the trigger from moving to the second position, and an unlocking position where it is driven by the safety button to disengage from the stop wall.

[0008] In one or more embodiments of the present utility model, a limiting groove extending into the trigger is formed in the first mounting portion. The safety lock structure further includes a lock piece bracket and a bracket spring. The lock piece bracket is limited in the limiting groove. The bracket spring is pressed between the bottom of the limiting groove and one end of the lock piece bracket. When the lock piece bracket is away from the stop wall, it presses the bracket spring. The bracket spring drives the lock piece bracket to move towards the rack direction. The safety lock piece is connected to the other end of the lock piece bracket.

[0009] In one or more embodiments of the present utility model, the firing confirmation mechanism further includes a connection structure connected to the safety lock structure. The connection structure includes a U-shaped bracket and a limiting rod. The U-shaped bracket includes two opposite mounting arms and a connecting arm connecting the mounting arms. The U-shaped bracket is pivotally connected to the first mounting portion through the mounting arms. The limiting rod is connected to the connecting arm. The lock piece bracket is connected to the limiting rod. The safety button acts on the connecting arm and drives the U-shaped bracket to move. The lock piece bracket can be driven by the U-shaped bracket and the limiting rod to approach or move away from the stop wall.

[0010] In one or more embodiments of the present utility model, a triangular convex block is formed on the lock piece bracket, and a first groove cooperating with the convex block is formed on the limiting rod.

[0011] In one or more embodiments of the present utility model, the safety lock piece is pivotally connected to the lock piece bracket through a pin.

[0012] In one or more embodiments of the present utility model, a second groove is recessed at one end of the lock piece bracket close to the safety lock piece. A lock piece spring is arranged in the second groove, and the lock piece spring is pressed between the bottom of the second groove and the safety lock piece.

[0013] In one or more embodiments of the present utility model, a push rod is pressed between the safety lock piece and the lock piece spring. The push rod has a spherical contact surface contacting the safety lock piece.

[0014] In one or more embodiments of the present utility model, the safety button includes a cylindrical rod body and a driving portion protruding from the rod body. A third groove is recessed in the driving portion. A guide piece protrudes from the connecting arm. When the U-shaped bracket rotates with the trigger, the guide piece is inserted into the third groove. When the U-shaped bracket moves, the guide piece is driven to move by the side wall of the third groove.

[0015] In one or more embodiments of the present utility model, two stop portions are arranged on the outer shell, and the driving portion is limited between the stop portions.

[0016] In one or more embodiments of the present utility model, the housing includes a baffle protruding into the installation space, the housing assembly further includes a trigger torsion spring, both ends of the trigger torsion spring are respectively connected to the trigger and the baffle, and when the trigger moves to the first position, the trigger torsion spring is compressed.

[0017] Compared with the prior art, after the stapler is provided with the firing confirmation mechanism, when the trigger is rotated to move the rack forward, the safety lock piece is blocked by the blocking wall on the rack, and the trigger cannot be actively reset (locked state). The stapler is always in this locked state when the safety button is not pressed. Only when the safety button is pressed, the safety lock piece disengages from the rack, the trigger loses its limit and thus resumes the reset function. After losing the finger force, it can rotate and move away from the handle, and pressing the trigger again can perform the firing operation. Therefore, the stapler provided with this mechanism can only perform the firing operation after the safety button is pressed, which can avoid accidental firing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is an exploded view of the stapler in an embodiment of the present utility model;

[0020] Figure 2 It is a partial cross-sectional view of the stapler in the locked state in an embodiment of the present utility model;

[0021] Figure 3 It is a partial cross-sectional view of the stapler in the firing state in an embodiment of the present utility model;

[0022] Figure 4 It is a schematic diagram of the firing confirmation mechanism in an embodiment of the present utility model;

[0023] Figure 5 It is a schematic diagram of the safety button in an embodiment of the present utility model;

[0024] Figure 6 It is a schematic diagram of the safety lock structure in an embodiment of the present utility model;

[0025] Figure 7 It is an exploded view of the safety lock structure in an embodiment of the present utility model;

[0026] Figure 8 It is a schematic diagram of the connection structure in an embodiment of the present utility model;

[0027] Figure 9 Schematic diagram of a limiting rod in an embodiment of the present utility model;

[0028] Figure 10 Exploded view of a thruster assembly in an embodiment of the present utility model;

[0029] Figure 11 Schematic diagram of a rack assembly in an embodiment of the present utility model;

[0030] Figure 12 is Figure 1 Partial enlarged view of the outer shell in

[0031] Figure 13 Schematic diagram of a stapler in an initial state in an embodiment of the present utility model;

[0032] Figure 14 Schematic diagram of a stapler in a firing state in an embodiment of the present utility model.

[0033] Description of main reference numerals:

[0034] 100 - stapler, 11 - outer shell, 111 - handle, 112 - stop portion, 113 - baffle, 12 - trigger, 13 - trigger torsion spring, 14 - jaw, 121 - first mounting portion, 122 - limiting groove, 20 - rack assembly, 21 - rack, 211 - retaining wall, 212 - notch, 22 - rack return piece, 23 - rack return spring, 24 - return hook, 25 - return pin, 30 - firing confirmation mechanism, 31 - safety button, 311 - rod body, 312 - driving portion, 313 - third groove, 32 - safety lock structure, 321 - safety lock piece, 322 - lock piece bracket, 3221 - convex block, 3222 - second groove, 323 - bracket spring, 324 - pin, 325 - lock piece spring, 326 - push rod, 3261 - rod body, 3262 - spherical contact surface, 33 - connecting structure, 331 - U - shaped bracket, 3311 - mounting arm, 3312 - connecting arm, 3313 - guide piece, 332 - limiting rod, 3321 - first groove, 40 - thruster assembly, 41 - thruster, 411 - push plate, 42 - rivet, 43 - thruster torsion spring, 50 - fixing mechanism, 51 - retainer, 52 - retainer spring. Detailed implementation manners

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] As Figure 1-14 shown, a stapler 100 in an embodiment of the present utility model includes a housing assembly, a rack assembly 20, and a firing confirmation mechanism 30. The housing assembly includes an outer shell 11 and a trigger 12. The outer shell 11 includes a handle 111, and an installation space is formed inside the outer shell 11. The trigger 12 is pivotally connected to the outer shell 11 through its first installation portion 121. The trigger 12 has two states, a first position and a second position, corresponding to the states when it is close to and away from the handle 111 respectively. A rack 21 is disposed in the installation space of the outer shell 11 and can move along its own length direction. One end of the rack 21 forms a stop wall 211. The firing confirmation mechanism 30 includes a safety button 31 and a safety lock structure 32. The safety button 31 is installed on the outer shell 11 and extends into the installation space. The safety lock structure 32 is connected to the first installation portion 121 and includes a safety lock piece 321. The safety lock piece 32 has a locking position where it abuts against the stop wall 211 to block the trigger 12 from moving to the second position, and an unlocking position where it is driven by the safety button 31 to disengage from the stop wall 211.

[0037] The stapler 100 has two states, a locked state and a firing state. After the trigger 12 is pressed to the first position close to the handle 111, the safety lock piece 321 abuts against the stop wall 211 to prevent the trigger 12 from returning to the second position. At this time, the stapler 100 enters the locked state, and the trigger 12 cannot be actively reset, so the trigger 12 cannot be repeatedly pressed for firing. When the safety button 31 is toggled, the safety button 31 can contact the safety lock structure 32 and drive the safety lock piece 321 to move to the unlocking position where it disengages from the stop wall 211. The trigger 12 can move unobstructedly between the first position and the second position. At this time, the stapler 100 enters the firing state, and the trigger 12 can be repeatedly pressed for firing operations.

[0038] The stapler 100 provided with the firing confirmation mechanism 30 needs to press the safety button 31 before each firing operation. Therefore, the probability of accidental firing can be effectively reduced, and the safety can be improved.

[0039] Specifically, a limiting groove 122 extending into the trigger 12 is formed on the first mounting portion 121. The safety lock structure 32 further includes a lock piece bracket 322 and a bracket spring 323. The lock piece bracket 322 is limited and moves within the limiting groove 122. The bracket spring 323 is pressed between the bottom wall of the limiting groove 122 and the lock piece bracket 322, and the safety lock piece 321 is connected to the other end of the lock piece bracket 322. The bracket spring 323 is used to provide a reset function for the lock piece bracket 322. When the lock piece bracket 322 is driven by the safety button 311 to drive the safety lock piece 321 to move away from the stop wall 211 ( Figure 3 in the direction of the arrow), the bracket spring 323 will be compressed, causing it to deform and store energy. And after the action of the safety button 321 is lost, the bracket spring 323 releases the stored energy and resets, thereby pushing the lock piece bracket 322 and the safety lock piece 321 to move towards the rack 21 again.

[0040] Furthermore, the firing confirmation mechanism 30 further includes a connection structure 33 connected to the safety lock structure 32. This structure includes a U-shaped bracket 331 and a limiting rod 332. The U-shaped bracket 331 includes two relatively arranged mounting arms 3311 and a connecting arm 3312 connecting the mounting arms 3311. The U-shaped bracket 331 is pivotally connected to the first mounting portion 121 through the two mounting arms 3311. The limiting rod 332 is connected between the two mounting arms 3311. When the safety button 31 moves, it can act on the connecting arm 3312 to drive the U-shaped bracket 331 and the limiting rod 332 to move. And the lock piece bracket 322 is arranged between the limiting rod 332 and the connecting arm 3312 and is connected to the limiting rod 332. Therefore, it can be driven by the limiting rod 332 to approach or move away from the rack 21 when the U-shaped bracket 331 and the limiting rod 332 move, thereby causing the safety lock piece 321 to abut against or disengage from the stop wall 211.

[0041] Specifically, as shown in Figure 4-6 , the lock piece bracket 322 and the limiting rod 332 are cross-connected. A convex block 3221 is formed on the lock piece bracket 322. Correspondingly, a first groove 3321 matching the convex block 3221 is formed on the limiting rod 332. The convex block 3221 and the first groove 3321 are in the shape of a matching triangle. The safety button 31 is installed on the outer shell 11, and its moving direction is perpendicular to the plane where the rotation direction of the trigger 12 is located. With the cooperation of the convex block 3221 and the first groove 3321, the safety button 31 can drive the lock piece bracket 322 to move within the limiting groove 122. In the initial state and the locked state, the first groove 3321 and the convex block 3221 are fitted together, and the safety lock piece 321 abuts against the stop wall 211; when the safety button 31 is pressed left or right to enter the firing state, the limiting rod 332 moves with the movement of the safety button 31, and the lock piece bracket 322 moves along under the cooperation of the first groove 3321 and the convex block 3221 Figure 3It moves in the direction of the arrow, driving the safety lock piece 321 away from the stop wall 211. At this time, the stapler 100 enters the firing state and can perform a firing operation.

[0042] Since the trigger 12 is pivotally connected to the housing 11, the moving path of the safety lock piece 321 is arc-shaped. When it contacts the rack 21, in addition to the horizontal movement towards the stop wall 211, it also has a displacement in the vertical direction. Therefore, it will inevitably come into contact with and rub against the rack 21. To prevent damage, the safety lock piece 321 is movably connected, that is, it is connected to the lock piece bracket 322 through a pin 324, and the safety lock piece 321 can rotate around the pin 324. Therefore, when the safety lock piece 32 contacts the rack 21 and moves towards the stop wall 211, the safety lock piece 321 can rotate, preventing the rigid connection from squeezing and damaging the rack 21 during movement.

[0043] Furthermore, a second groove 3222 is recessed on one side of the lock piece bracket 322 close to the safety lock piece 321. A lock piece spring 325 is arranged in the second groove 3222. The lock piece spring 325 is squeezed between the bottom of the second groove 3222 and the safety lock piece 321, used to ensure the shape of the safety lock piece 321, so that it can reset after leaving the rack 21 and can smoothly abut against the stop wall 211.

[0044] Preferably, a push rod 326 is squeezed between the safety lock piece 321 and the lock piece spring 325. The push rod 326 has a spherical contact surface 3262 that contacts the safety lock piece 321, to ensure the acting force of the lock piece 325 on it in different postures of the safety lock piece 321, and to further ensure the reset effect of the safety lock piece 321.

[0045] Specifically, the push rod 326 includes a rod body 3261 limited in the safety lock piece 321, and a hemisphere connected to the rod body 3261 and contacting the safety lock piece 321. The above-mentioned spherical contact surface 3262 is formed on the hemisphere.

[0046] As Figure 5 shown, the safety button 31 includes a cylindrical rod body 311, and a driving part 312 protruding from the rod body 311. A third groove 313 is formed on the driving part 312. Correspondingly, a guide piece 3313 protrudes on the connecting arm 3312. Therefore, when the trigger 12 rotates from the second position to the first position, the U-shaped bracket 331 follows, making the guide piece 3313 enter the third groove 313. Subsequently, when the safety button 31 is pressed, the guide piece 3313 is squeezed by the side wall of the third groove 313 and moves. Therefore, the U-shaped bracket 331 moves with the movement of the safety button 31, and then causes the lock piece bracket 322 to move away from the rack 21, and the safety lock piece 321 leaves the stop wall 211.

[0047] As Figure 12As shown in the figure, two stoppers 112 are provided on the outer shell 11. The two stoppers 112 surround the mounting hole through which the rod body 311 passes, and the driving part 312 is limited between the two stoppers 112.

[0048] In this stapler 100, a driving assembly 40 for driving the movement of the driving rack 21 is further provided. The driving assembly 40 includes a pusher 41 connected to the first mounting portion 121. The pusher 41 is pivotally mounted on the first mounting portion 121 by a rivet 42, and a push plate 411 is formed at its front end. At the same time, the pusher 41 is also connected with a pusher torsion spring 43. A baffle 113 protrudes from the inner wall of the outer shell 10. The two ends of the torsion spring 43 respectively abut against the pusher 41 and the baffle 113. A plurality of teeth are provided on the rack 21. When the trigger 12 moves from the second position to the first position, the pusher 41 meshes with the teeth and drives the rack 21 to move outward from the installation space; when the trigger 12 moves from the first position to the second position, under the action of the pusher torsion spring 43, the end of the pusher 41 in contact with the teeth can move along the teeth without driving the rack 21 to move in the opposite direction.

[0049] As Figure 1 shown in the figure, the trigger 12 is also connected with a trigger torsion spring 13. One end of the trigger torsion spring 13 abuts against the trigger 12, and the other end abuts against the baffle 113. The trigger torsion spring 13 deforms and stores energy when the trigger 12 moves to the first position, and releases the stored energy when restoring the deformation to drive the trigger 12 to move from the first position to the second position.

[0050] The front end of the stapler 100 is provided with a jaw 14, which is connected to the rack 21 and is driven by the rack 21 to open or close. At the same time, the stapler 100 is also provided with a fixing mechanism 50 for restricting the movement of the rack 21. The fixing mechanism 50 includes a retainer 51 and a retainer spring 52. After the pusher 41 drives the rack 21 to move, the retainer 51 can engage with the notch 212 on the rack 21 under the action of the retainer spring 52 to prevent the rack 21 from retracting. And, the rack assembly 20 is also provided with a rack reset mechanism, including a rack reset piece 22, a rack reset spring 23, a reset hook 24 and a reset pin 25. The rack reset piece 22 is connected to the rack 21. One end of the reset hook 24 is fixed to the outer shell 11 through the reset pin 25, and the other end is connected to the rack reset piece 22 through the rack reset spring 23. Therefore, when the rack 21 moves, the rack reset spring 23 stretches and stores energy, and drives the rack 21 to move in the reverse direction and reset after the rack 21 loses traction.

[0051] Here, in combination with a specific usage scenario, the stapler 100 in this embodiment is further described.

[0052] In the initial state, the jaws 14 at the front end of the stapler 100 are in an open state. When the trigger 12 is pulled, the rack 21 contacts the pusher 41, and the pusher 41 pushes the rack 21 to move a certain distance. The stopper 51 is engaged with the notch 212 at the front end of the rack 21 by the action of the stopper spring 52, so that the rack 21 is fixed and the jaws 14 are kept in a closed state. At the same time, the guide piece 3313 on the U-shaped bracket 331 enters the third groove 313 formed by the safety button 31.

[0053] After the jaws 14 are closed, the trigger 12 is released, and the trigger 12 rotates clockwise by a certain angle, and the safety lock piece 321 is clamped on the retaining wall 211 to limit the movement of the trigger 12, so that the trigger 12 cannot perform the firing function.

[0054] At this time, if the trigger 12 continues to be rotated counterclockwise, the trigger 12 will drive the rack 21 together to return to the initial state, and the jaws 14 will return from the closed state to the open state.

[0055] After the jaws 14 are closed, the safety button 311 is pressed to drive the U-shaped bracket 331 and the limiting rod 332 to move in the same direction, thereby driving the locking plate bracket 322 to move in a direction away from the retaining wall 211, and the safety locking plate 321 is disengaged from the retaining wall 211. Under the action of the trigger torsion spring 13, the trigger 12 automatically returns to the second position.

[0056] When the jaws 14 are closed and the safety button 10 is pressed to return the trigger 12 to the second position, the trigger 12 is pulled counterclockwise again, and the push plate 411 engages with the teeth on the rack 21, thereby pushing the rack 21 to move, thereby realizing the firing function of the instrument.

[0057] When the safety button 311 is released, the safety lock piece 321 , the U-shaped bracket 331 , the lock piece bracket 322 , the limit rod 332 , the safety button 311 , etc. are all reset under the action of the springs connected to them.

[0058] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0059] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stapler with a firing confirmation mechanism, characterized in that: include: A housing assembly, comprising a shell and a trigger, wherein the shell comprises a handle and has a mounting space formed therein, the trigger is pivotally connected to the shell through a first mounting portion thereof, and the trigger has a first position close to the handle and a second position away from the handle; A rack assembly is installed in the installation space, comprising a rack that can move along its length direction, and a retaining wall is formed at one end of the rack; The firing confirmation mechanism includes a safety button and a safety lock structure, wherein the safety button is installed on the housing and extends into the installation space, and the safety lock structure is connected to the first installation portion and includes a safety lock plate, wherein the safety lock plate has a locking position that abuts against the retaining wall to prevent the trigger from moving to the second position, and an unlocking position that is driven by the safety button to disengage from the retaining wall.

2. The stapler with a firing confirmation mechanism according to claim 1, characterized in that: The first mounting portion is provided with a limiting groove extending into the trigger, and the safety lock structure also includes a locking plate bracket and a bracket spring, the locking plate bracket is limited in the limiting groove, the bracket spring is squeezed on the bottom of the limiting groove and one end of the locking plate bracket, the locking plate bracket squeezes the bracket spring when away from the retaining wall, and the bracket spring drives the locking plate bracket to move toward the rack direction, and the safety lock plate is connected to the other end of the locking plate bracket.

3. The stapler with a firing confirmation mechanism according to claim 2, characterized in that: The firing confirmation mechanism also includes a connecting structure connected to the safety lock structure, the connecting structure includes a U-shaped bracket and a limiting rod, the U-shaped bracket includes two mounting arms arranged opposite to each other and a connecting arm connected to the mounting arms, the U-shaped bracket is connected to the first mounting portion through the mounting arms, the limiting rod is connected to the connecting arm, the locking plate bracket is connected to the limiting rod, the safety button acts on the connecting arm and drives the U-shaped bracket to move, and the locking plate bracket can be driven by the U-shaped bracket and the limiting rod to approach or move away from the retaining wall.

4. The stapler with a firing confirmation mechanism according to claim 3, characterized in that: A triangular convex block is formed on the locking plate bracket, and a first groove matched with the convex block is formed on the limiting rod.

5. The stapler with a firing confirmation mechanism according to claim 4, characterized in that: The safety lock piece is pivotally connected to the lock piece bracket through a latch pin.

6. The stapler with a firing confirmation mechanism according to claim 5, characterized in that: A second groove is concavely formed at one end of the locking plate bracket close to the safety locking plate, a locking plate spring is arranged in the second groove, and the locking plate spring is squeezed between the bottom of the second groove and the safety locking plate.

7. The stapler with a firing confirmation mechanism according to claim 6, characterized in that: A push rod is squeezed between the safety lock plate and the lock plate spring, and the push rod has a spherical contact surface that contacts the safety lock plate.

8. The stapler with a firing confirmation mechanism according to claim 3, characterized in that: The safety button includes a cylindrical rod body and a driving portion protruding from the rod body, the driving portion is recessed with a third groove, the connecting arm is protruding with a guide piece, the U-shaped bracket is inserted into the third groove when the trigger rotates, and the guide piece is driven to move by the side wall of the third groove when the U-shaped bracket moves.

9. The stapler with a firing confirmation mechanism according to claim 8, characterized in that: The housing is provided with two stoppers, and the driving part is located between the stoppers.

10. The stapler with a firing confirmation mechanism according to claim 1, characterized in that: The shell includes a baffle plate protruding into the installation space, and the housing assembly also includes a trigger torsion spring, both ends of which are respectively connected to the trigger and the baffle plate, and the trigger torsion spring is compressed when the trigger moves to the first position.

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