CN209529241U - Firing lock and stapler - Google Patents

Abstract

The utility model provides a firing mechanism and a stapler. The firing mechanism includes an actuating rod provided with a stop groove; a firing handle has a first position, and a pin is arranged inside the firing handle. state and the second state, when the pin is in the first state and the firing handle is in the first position, the first end of the pin protrudes beyond the first end of the firing handle and enters the stop groove, and the firing handle is non-rotatable relative to the actuating rod ; Push the button, when the push button moves in the first direction, the first end of the pressing pin moves in the direction of the second end of the firing handle, and the pin enters the second state. By adopting the utility model, when the stapler does not reach the firing state, the pin in the first state is inserted into the stopper groove of the actuating rod to limit the rotation of the firing handle, and the driving part of the firing handle cannot drive the actuating rod Moving to the far end, the operator cannot hold the firing handle to fire the stapler, thereby avoiding false firing of the stapler.

Description

Firing mechanism and stapler

technical field

The utility model relates to the technical field of medical instruments, in particular to a firing mechanism and a stapler.

Background technique

Gastrointestinal diseases are one of the most common diseases in human beings. In the course of treatment, staplers are often used instead of doctors' manual operations to anastomose physiological tissues such as the digestive tract. Linear stapler is a common shell surgical instrument, most of which use linear binding method to anastomose physiological tissues such as esophagus, stomach, and intestinal tract during surgery.

A linear stapler generally includes an instrument platform and a head detachably mounted on the platform. The head can pass through a small incision on the body through a puncture device to approach the surgical site for surgery. Specifically, the instrument platform includes a firing handle, and the detachable head includes a nail box shell and a nail head installed on the far end of the nail box shell. action part. Driven by the firing handle, the firing assembly can drive the nail head to complete the suture cutting operation.

In the existing linear stapler, when the operation is not ready, the doctor may mistakenly hold the firing handle due to carelessness or lack of experience, resulting in false firing of the stapler, affecting the surgical effect, and even causing damage to the patient.

Utility model content

In view of the problems in the prior art, the purpose of this utility model is to provide a firing mechanism and a stapler, when the pin is inserted into the stop groove of the actuating rod, the operator cannot hold the firing handle to fire the stapler .

The embodiment of the utility model provides a firing mechanism for a stapler, the firing mechanism includes: an actuating rod, the actuating rod is provided with a stop groove; a firing handle, the firing handle has a first position, and the firing handle has a first position. A pin is arranged inside the firing handle, and the pin has a first state and a second state. When the pin is in the first state and the firing handle is in the first position, the pin The first end of the firing handle protrudes from the first end of the firing handle and enters the stop groove, the firing handle is non-rotatable relative to the actuating rod; the push button moves in a first direction When pressing, the first end of the pin is pressed to move toward the second end of the firing handle, so that the pin enters the second state from the first state.

Optionally, a balance weight is also included, the balance weight includes a rotation part and a connection part, the connection part of the balance weight is connected to the dial button, when the rotation part of the balance weight rotates in the first direction, Drive the push button to move along the first direction.

Optionally, a pin slot is provided inside the firing handle, the pin is set in the pin slot, and a pin reset member is provided between the second end of the pin and the pin slot, The pin has only linear movement in a direction defined by the pin slot.

Optionally, the pin reset member is a compression spring, and when the pin is in the second state, the second end of the pin compresses the compression spring to deform.

Optionally, the pin and the push button are respectively provided with a first fitting portion and a second fitting portion that cooperate with each other, and when the push button moves along the first direction, the first fitting portion presses The second matching portion enables the first end of the pin to move toward the firing handle.

Optionally, both the first fitting portion and the second fitting portion are bosses, or the first fitting portion is a boss, and the second fitting portion is a concave boss, or the first fitting portion is a concave platform, and the second matching part is a convex platform.

Optionally, the first fitting part is a boss, and the boss includes a stopper and a step part, and the second fitting part is a recess matched with the stopper.

Optionally, the dial button includes a dial portion connected to the second matching portion, and the dial portion is passed through the shell of the stapler.

Optionally, the housing of the stapler is provided with a push button stopper, and the push button stopper is located on a path where the push button moves along the first direction.

Optionally, the firing handle also has a second position. When the pin is in the second state, the first end of the pin is disengaged from the stop groove, and the firing handle can be positioned in the second state. Rotate between the first position and the second position.

Optionally, the proximal end of the stop groove is provided with an arc groove recessed toward the inside of the actuating rod, the pin is in the first state, and the firing handle is in the second state from the second state. When the position is rotated to the first position, the arc groove cooperates with the first end of the pin and guides the first end of the pin to enter the stop groove.

Optionally, the firing handle is also provided with a driving member, the actuating lever has a third position and a fourth position, and the proximal end and the distal end of the stop groove are respectively provided with a rack and a propelling tooth;

When the actuating lever is in the third position and the firing handle is rotated from the second position to the first position, the driving member contacts the propelling teeth and pushes the actuating gear. the rod moves toward the distal end of the stapler into the fourth position;

When the actuating lever is in the fourth position and the firing handle is rotated from the second position to the first position, the driving member contacts the rack and pushes the actuating lever. The rod moves toward the distal end of the stapler.

The embodiment of the utility model also provides a stapler, which includes the firing mechanism.

The firing mechanism and stapler provided by the utility model have the following advantages:

The utility model provides a firing mechanism for a stapler. The firing safety of the stapler is realized through the cooperation of a pin column and an actuating rod. After the stapler is closed, the doctor needs to adjust the stacking state of the tissue of the nail head. Such as flattening the tissue to a state where it can be fired. When the tissue has not reached the firing state, the pin is inserted into the stopper groove in the actuating rod to limit the rotation of the firing handle. The operator cannot hold the firing handle to fire the stapler, thereby preventing the stapler from being fired before the operation is ready; when the push button moves in the first direction, the pin can be pressed to break away from the stop groove and The rotation of the firing handle is not limited, and the handle can be rotated until the driving part can drive the actuating rod to fire the stapler; the utility model can be applied not only to linear staplers, but also to other types of staplers.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings.

Fig. 1 is a structural schematic diagram of the cooperation between the firing mechanism and the stapler body according to an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of the firing mechanism in an initial state according to an embodiment of the present invention;

Figures 3 to 4 are schematic diagrams of the cooperation of the pin column with the dial button and the rack in an embodiment of the present invention;

Figures 5 to 6 are schematic diagrams of the cooperation between the pin and the push button according to an embodiment of the present invention;

7 to 8 are structural schematic diagrams of a rack according to an embodiment of the present invention;

Figures 9 to 10 are structural schematic diagrams of the firing mechanism when the firing handle is pressed according to an embodiment of the present invention;

Fig. 11 is a schematic structural view of the firing mechanism in an insurance position according to an embodiment of the present invention;

Fig. 12 is a structural schematic view of the firing mechanism according to an embodiment of the present invention when it is in a firing position.

Reference signs:

1 Stapler body 6 Pin

11 Push button limiter 61 The first end of the pin

2 Secure the second end of the handle 62 pin

3 Firing handle 63 The first mating part

31 first end of firing handle 631 stopper

32 The second end of the firing handle 632 Step portion

4 Drive element 7 Pin return spring

5 Actuating lever 8 Dial button

51 Rack 81 Second mating part

511 Rack groove 82 Pressing part

52 arc groove 821 finger position

53 Stop groove 9 Balance weight

54 Push teeth 91 Rotary part

58 Smooth part 92 Connecting part

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully incorporate the concepts of example embodiments. communicated to those skilled in the art. The same reference numerals denote the same or similar structures in the drawings, and thus their repeated descriptions will be omitted.

In order to solve the technical problems in the prior art, the utility model provides a firing mechanism for a stapler, the firing mechanism includes: an actuating rod, the actuating rod is provided with a stop groove; a firing handle, the The firing handle has a first position, a pin is arranged inside the firing handle, the pin has a first state and a second state, the pin is in the first state and the firing handle is in the In the first position, the first end of the pin protrudes from the first end of the firing handle and enters the stop groove, and the firing handle is non-rotatable and resettable relative to the actuating rod; the push button, When the push button moves in the first direction, the first end of the pressing pin moves toward the second end of the firing handle, so that the pin enters the second state from the first state. state. The embodiment of the utility model also provides a stapler, including the firing mechanism. The stapler is not limited to a linear stapler, and may also be other types of staplers.

Therefore, in the firing mechanism of the present utility model, the firing safety of the stapler is realized through the cooperation of the pin and the actuating rod. When the stapler does not reach the firing state, the pin is in the first state, and the pin is inserted into the actuating rod. The stop groove in the middle restricts the rotation and reset of the firing handle. The driving part of the firing handle cannot interact with the actuating rod. Even if the firing handle is pressed, the actuating rod cannot be pushed to move far. The firing of the stapler, thereby avoiding the false firing of the stapler. Therefore, when the pin is in the first state, the stapler is in a safe state, and the stapler cannot be fired normally. When the push button moves along the first direction, the pin can be pressed to disengage from the stop groove without restricting the rotation of the firing handle.

The structures of the firing mechanisms of the various embodiments of the present utility model are introduced below in conjunction with the accompanying drawings.

As shown in Figures 1 to 12, the structure of the firing mechanism and components therein according to the first embodiment of the present utility model is shown. In this embodiment, the firing mechanism includes an actuating lever 5 , a firing handle 3 and a dial button 8 . The actuating rod 5 is provided with a stop groove 53; the firing handle 3 has a first position and a second position, and a pin 6 is arranged inside the firing handle 3, and the pin 6 has a first state and a second position. In the second state, when the pin 6 is in the first state and the firing handle 3 is in the first position, the first end 61 of the pin 6 protrudes beyond the first end of the firing handle 3 31 and enters the stop groove 53, the firing handle 3 is non-rotatable relative to the actuating rod 5; when the dial button 8 moves along the first direction, it presses the first end 61 of the pin 6 Moving towards the direction of the second end 32 of the firing handle 3, so that the pin 6 enters the second state from the first state. The first direction in this embodiment is the direction of B indicated in FIG. 4 . In this embodiment, when the pin 6 is in the second state, the pin retracts toward the second end of the firing handle 3 to disengage from the stop groove 53 .

As shown in FIG. 1 , it is a schematic diagram of the cooperation between the firing mechanism and the stapler body according to an embodiment of the present invention. The interior of the stapler body 1 is provided with the actuating rod 5, and the distal end of the actuating rod 5 is connected with the push knife assembly. The actuating rod 5 has a third position and a fourth position, the third position is located at the proximal end of the fourth position, and when the actuating rod 5 continues to move from the fourth position to the distal end of the stapler, the push knife assembly can be pushed to realize the stapler firing. The stapler body 1 is provided with a fixed handle 2, and the first end 31 of the firing handle 3 is pivotally connected to the stapler body 1, and a firing handle reset structure is arranged between the firing handle 3 and the stapler body 1. The resetting structure of the percussion handle can be structures such as extension spring, torsion spring, and compression spring. When the firing handle 3 is held by the operator, it can rotate relative to the stapler body 1 along the direction A in the figure. The position of the firing handle 3 shown in FIG. 1 is the second position. At this time, the firing mechanism is in the initial state, and the operator holds the firing handle 3 so that when the second end 32 of the firing handle 3 is close to the fixed handle 2, the firing handle 3 Entering the first position, when the operator releases the firing handle 3, the firing handle 3 can rotate in the direction opposite to the direction A under the effect of the firing handle reset structure, and the second end 32 of the firing handle 3 is far away from the fixed handle 2, and the firing The handle 3 returns to the second position.

In the present invention, the far end and the near end are relative to the operator, wherein the far end refers to the end farther away from the operator, and the proximal end refers to the end closer to the operator. For example, in the viewing angle of FIG. 1 , the distal end of the stapler body 1 refers to the left end in the figure, and the proximal end refers to the right end in the figure.

As shown in FIG. 2 , it is a structural schematic diagram of the firing mechanism in an initial state according to an embodiment of the present invention. At this time, the firing handle 32 is in the second position, and the pin 6 is in the first state. In this embodiment, a pin slot 33 is provided inside the firing handle 3, and the pin 6 is set in the pin slot 33, and the pin 6 can only move along the direction defined by the pin slot 33. , and a pin reset member 7 is provided between the second end 62 of the pin 6 and the pin groove 33 . In this embodiment, the pin reset member 7 is a compression spring. When the pin 6 is pressed by the dial button 8 in the direction of the second end 32 of the firing handle 3, the pin 6 enters from the first state. In the second state, at the same time, the second end 62 of the pin 6 compresses the compression spring to deform, that is, the first state of the pin 6 is a protruding state, and the second state of the pin 6 is Indented state. When the dial button 8 moves in the direction opposite to the first direction, the dial button 8 no longer presses the pin 6, and the pin 6 returns to the first state under the action of the deformation recovery force of the compression spring.

As shown in Figures 3 to 6, in this embodiment, the firing mechanism further includes a balance weight 9, and the balance weight 9 includes a rotating portion 91 and a connecting portion 92, and the connecting portion 92 of the balance weight 9 is connected to the dial. The push button 8 is fixedly connected with each other, and the rotating part 91 is pivotally set on the fixed handle 2. When the rotating part 91 rotates along the first direction, it drives the push button 8 to move along the first direction. The balance weight 9 can also be rotatably fixed on the shell of the stapler body 1, for example, a corresponding rotating shaft is set inside the shell of the stapler body 1, and the balance weight 9 is sleeved on the outside of the rotating shaft, but The utility model is not limited thereto, and the balance weight 9 may also adopt other fixing methods.

Therefore, in this embodiment, the state of the pin 6 can be changed by the movement of the push button 8 through the cooperation of the balance weight 9 , the push button 8 and the pin 6 . The movement of the dial button 8 is always centered on the balance weight 9, and the dial button 8 does not produce displacement along the axial direction of the balance weight 9 relative to the stapler body 1, which improves the overall structural stability of the firing mechanism, and It is convenient for the operator to use.

As shown in Figures 3 to 6, in this embodiment, the pin 6 and the push button 8 are respectively provided with a matched first matching portion 63 and a second matching portion 81, and the push button 8 moves in the first direction, the first matching portion 63 presses the second matching portion 81, so that the first end 61 of the pin 6 moves toward the second end 32 of the firing handle 3.

In this embodiment, the first fitting portion 63 is a boss, and the boss includes a stop portion 631 and a step portion 632 , and the second fitting portion 81 is a recess that fits with the stop portion 631 . tower. In the viewing angle of FIG. 4 , the stop portion 631 is located above the step portion 632 , and the stop portion 631 directly cooperates with the second matching portion 81 . In other alternative embodiments, both the first fitting portion 63 and the second fitting portion 81 can be set as bosses, or the first fitting portion 63 can be set as bosses of other shapes, and the first fitting portion 63 can be set as bosses of other shapes. The second matching portion 81 is a concave platform, or the first matching portion 63 is configured as a concave platform, and the second matching portion 81 is a convex platform or the like. When the balance weight 9 rotates in the first direction, it drives the dial button 8 to move in the first direction, and the concave platform of the dial button 8 presses the boss of the pin 6, and compresses the compression spring 7 in an obliquely downward direction. By making the first end 61 of the pin 6 move toward the second end 32 of the firing handle 3, the pin 6 can enter the second state from the first state.

The dial button 8 includes a dial portion 82 connected to the second matching portion 81, the dial portion 82 is passed through the shell of the stapler and protrudes out of the shell . In this embodiment, there are two pressing parts 82 , which are respectively passed through the shells on both sides of the stapler body 1 . Further, a push button limiter 11 is also provided on the shell of the stapler, and the push button limiter 11 is located on the path where the push button 8 moves along the first direction, for Limit the movement of the dial button 8 along the first direction. A finger position 821 can also be provided on the pressing part 82, which is convenient for the operator to operate from the left and right sides of the casing.

As shown in FIG. 7 and FIG. 8, the proximal end of the stop groove 53 may be provided with an arc groove 52 recessed toward the interior of the actuating rod 5, and the pin 6 is in the first state, And when the firing handle 3 is rotated from the second position to the first position, the arc groove 52 cooperates with the first end 61 of the pin 6 and guides the first end of the pin 6 . The end 61 enters the stop groove 53 .

In this embodiment, the firing handle 3 is further provided with a driving member 4, and the lower part of the actuating rod 5 is also provided with a rack 51 and a propelling tooth 54, and the rack 51 is located at the proximal end of the propelling tooth 54, Moreover, a smooth portion 58 is provided between the rack 51 and the propelling tooth 54 , and the rack 51 and the propelling tooth 54 can cooperate with the driving member 4 of the firing handle 3 respectively. In the initial state, the actuating lever 5 is at the third position, and when the firing handle 3 rotates from the second position to the first position, the driving member 4 is in contact with the propelling tooth 54 contact, and drive the actuating rod 5 to move toward the distal end of the stapler to enter the fourth position; the actuating rod 5 is in the fourth position, and the firing handle 3 moves from the second When the position is rotated to the first position, the driving member 4 enters the area of the rack 51, and can further push the actuating rod 5 to move toward the distal end of the stapler, so as to push the push knife assembly, and then Fire the stapler.

The structure of the firing mechanism of this embodiment in various states will be described in detail below with reference to FIGS. 9 to 12 .

In the initial position, as shown in FIG. 2 , the first end 61 of the pin 6 protrudes from the firing handle 3 and is located in the area of the rack 51 , and the driving member 4 is located in the smooth portion 58 .

When the stapler is closed, as shown in FIG. 9 and FIG. 10 , when the firing handle 3 is held, the firing handle 3 is in two positions in the process of rotating from the second position to the first position. During this process, the actuating lever 5 enters the fourth position from the third position, as shown in FIG. 52 is slightly compressed, and the first end 61 of the pin 6 still protrudes from the firing handle 3 . As shown in FIG. 10 , it is the state where the firing handle 3 is held to the maximum. At this time, the pin 6 is still in the first state, and the pin 6 has reached the farthest end of the arc groove 52 . That is, when the firing handle 3 rotates from the second position to the first position, the first end 61 of the pin 6 is guided by the arc groove 52 to gradually approach the stop groove 53 . At this time, continue to hold the firing handle 3, as shown in Figure 11, the firing handle 3 rotates to the first position until the driver 4 is in contact with the propelling teeth 54, and continues to press the firing handle 3, the firing handle 3 can be pushed by the driving member 4 with a propulsion The actuating rod 5 of the teeth 54 moves toward the distal end of the stapler, and the actuating rod 5 is pushed to move along the direction C in the figure to enter the fourth position. And the pin 6 enters the stop groove 53 .

At this time, since the actuating lever 5 is pushed to the fourth position, if the firing handle 3 returns to the second position, the position of the driving member 4 will be opposite to the position of the rack 51. When the operator continues to press the firing handle 3, the firing handle 3 will start from the second position. When the second position is rotated to the first position, the driving member 4 will further push the rack 51 to move toward the distal end of the stapler, and then the stapler can be fired. However, if the operator mistakenly presses the firing handle 3 before the preparation for the operation is completed, it will cause false firing of the stapler. Therefore, in the state of FIG. 11 , since the first end 61 of the pin 6 is inserted in the stop groove 53, the stop groove 53 limits the rotational movement of the pin 6, and thus limits the rotation of the firing handle 3. In the reset movement, the firing handle 3 cannot return from the first position in Fig. 11 to the second position, and the operator cannot press the firing handle 3 again, which avoids false firing before the operation preparation is completed.

In the state of FIG. 11 , if the push button 8 is pressed downward, the push button 8 will rotate in the first direction around the rotating part 91 of the balance weight 9, and drive the first end 61 of the pin 6 toward the firing handle. 3 moves in the direction of the second end 32 of the pin 6, the first end of the pin 6 disengages from the stop groove 53 of the actuating rod 5, and the stop groove 53 no longer restricts the rotation of the firing handle 3. At this time, the operator releases the firing handle 3, and the firing handle 3 can return to the second position under the reset action of the firing handle reset structure, and enter the state of FIG. 12 . After the percussion handle 3 is reset, the toggle button 8 can be released, and the pin post 6 enters the first state again.

As shown in FIG. 12 , it is a structural schematic diagram of the firing mechanism of this embodiment when it is in a firing position. At this time, the actuating lever 5 is in the fourth position, and the driving member 4 of the firing handle 3 cooperates with the rack 51 . If the firing handle 3 is held, so that the firing handle 3 rotates from the second position to the first position along the direction A, the driving member 4 will push the actuating rod 5 to move to the distal end of the stapler through the rack 51 to realize the firing of the stapler . In order to prevent the first end 61 of the pin 6 from causing excessive resistance to the rotation of the firing handle 3, a rack groove 511 can be further provided at the part where the rack 51 cooperates with the first end 61 of the pin 6, so that the pin The first end 61 of 6 moves along the rack groove 511 to the far end of the rack.

The firing mechanism and stapler provided by the utility model have the following advantages:

The utility model provides a firing mechanism for a stapler. The firing safety of the stapler is realized through the cooperation of a pin column and an actuating rod. After the stapler is closed, the doctor needs to adjust the stacking state of the tissue of the nail head. Such as flattening the tissue to a state where it can be fired. When the tissue has not reached the firing state, the pin is inserted into the stopper groove in the actuating rod to limit the rotation of the firing handle. The operator cannot hold the firing handle to fire the stapler, thereby preventing the stapler from being fired before the operation is ready; when the push button moves in the first direction, the pin can be pressed to break away from the stop groove and The rotation of the firing handle is not limited, and the handle can be rotated until the driving part can drive the actuating rod to fire the stapler; the utility model can be applied not only to linear staplers, but also to other types of staplers.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the utility model belongs, on the premise of not departing from the concept of the utility model, some simple deduction or replacement can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (13)

1. a kind of firing lock, which is characterized in that be used for stapler, the firing lock includes:

Actuating lever, the actuating lever offer a backstop slot；

Percussion handle, the percussion handle have first position, and the percussion handle is internally provided with a pin, the pin With first state and the second state, the pin is in the first state and the percussion handle is in the first position When, the first end of the pin protrudes from the first end of the percussion handle and enters the backstop slot, the percussion handle phase It is non-rotatable for the actuating lever；

Press button is dialled, when described group of press button is moved along first direction, suppresses the first end of the pin towards the percussion handle The direction of second end moves, so that the pin enters second state from the first state.

2. firing lock according to claim 1, which is characterized in that further include balance weight, the balance weight includes rotation Portion and interconnecting piece, the interconnecting piece of the balance weight are connected with described group of press button, and the rotating part of the balance weight is along first direction When rotation, the press button of dialling is driven to move along first direction.

3. firing lock according to claim 1, which is characterized in that the percussion handle is internally provided with a cotter way, The pin is set in the cotter way, and pin return unit is provided between the second end of the pin and the cotter way, institute It states pin and only has the linear motion for limiting direction along the cotter way.

4. firing lock according to claim 3, which is characterized in that the pin return unit is pressure spring, at the pin When second state, the second end of the pin compresses the pressure spring deformation.

5. firing lock according to claim 1, which is characterized in that be respectively arranged on the pin and described group of press button The first auxiliary section and the second auxiliary section matched, when described group of press button is moved along first direction, the first auxiliary section pressing Second auxiliary section, so that the direction of the first end of the pin towards the second end of the percussion handle moves.

6. firing lock according to claim 5, which is characterized in that first auxiliary section and the second auxiliary section are convex Platform, or, first auxiliary section is boss, second auxiliary section is concave station, or, first auxiliary section is concave station, it is described Second auxiliary section is boss.

7. firing lock according to claim 5, which is characterized in that first auxiliary section is boss, the boss packet Stopper section and stage portion are included, second auxiliary section is the concave station matched with the stopper section.

8. firing lock according to claim 5, which is characterized in that described group of press button include and second auxiliary section phase Splenium is dialled in connection, and described group of splenium is arranged in the shell of the stapler.

9. firing lock according to claim 8, which is characterized in that be provided on the shell of the stapler and dial press button limit Position part, described group of press button locating part are located at the press button of dialling along the path that first direction moves.

10. firing lock according to claim 1, which is characterized in that the percussion handle also has the second position, described When pin is in second state, the first end of the pin and the backstop slot are detached from, and the percussion handle can be described It is rotated between first position and the second position.

11. firing lock according to claim 10, which is characterized in that the proximal end of the backstop slot is provided with described in The recessed arc groove in the inside of actuating lever, the pin are in the first state, and the percussion handle is from the second When setting rotation to the first position, the arc groove matches with the first end of the pin and guides the first of the pin End enters the backstop slot.

12. firing lock according to claim 10, which is characterized in that it is additionally provided with actuator in the percussion handle, The actuating lever has the third place and the 4th position, and the backstop slot is proximally and distally respectively arranged with rack gear and propulsion Tooth；

The actuating lever is in the third place, and the percussion handle is rotated from the second position to the first position When, the actuator is in contact with the propulsion tooth, and the actuating lever is pushed to move into institute to the distal end of the stapler State the 4th position；

The actuating lever is in the 4th position, and the percussion handle is rotated from the second position to the first position When, the actuator is in contact with the rack gear, and pushes the actuating lever mobile to the distal end of the stapler.

13. a kind of stapler, which is characterized in that the stapler includes percussion lock described in any one of claims 1 to 12 Structure.