Closure switching mechanism and electric anastomat

Abstract

The invention provides a closing switching mechanism and an electric anastomat, the closing switching mechanism is arranged on an anastomat body of the electric anastomat, and the closing switching mechanism comprises a percussion rod, a first matching piece, a second matching piece, a first locking piece and a second locking piece, the handle is provided with a second matching piece; when the safety piece is located at the first position, the stopping part of the safety piece stops the percussion rod from moving towards the far end; the driving assembly is configured to be driven to move towards the near end when the nail bin assembly is installed at the far end of the anastomat body so as to drive the safety piece to move from the first position to the second position, and at the moment, when the handle moves in the first direction, the percussion rod can be driven to move towards the far end. According to the electric anastomat, the handle and the corresponding matching piece are arranged in the electric anastomat, the jaw of the nail bin assembly can be manually closed, meanwhile, the safety piece is arranged, it is guaranteed that the nail bin assembly cannot move in the far-end direction when not installed, and normal assembly of the nail bin assembly is prevented from being affected.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a closing switching mechanism and an electric stapler. Background Art

[0002] In the prior art, an electric stapler includes a stapler body and a stapler assembly connected to the distal end of the stapler body, wherein a closing and firing assembly is provided in the stapler body to drive the stapler assembly to close and fire. The electrification of the stapler is beneficial to reduce the pulling of tissues during operation and improve the quality of staplers, and is therefore suitable for wide promotion and application.

[0003] However, the jaw closure of the existing stapler assembly is achieved by motor drive, and the doctor cannot sense the feedback force when the jaws of the stapler assembly are closed, and cannot sense the compression state of the tissue when the jaws of the stapler assembly are closed, which may lead to excessive compression of the tissue or insufficient clamping force, and cannot select a suitable stapler assembly according to the feedback force. In addition, when the stapler assembly is not installed to the distal end of the stapler body, the position stability of the firing rod in the stapler body needs to be ensured. If the firing rod accidentally moves to the distal end, it will affect the normal assembly of the stapler assembly. Summary of the invention

[0004] In response to the problems in the prior art, the purpose of the present application is to provide a closing switching mechanism and an electric stapler. By providing a handle and corresponding matching parts in the electric stapler, the jaws of the staple magazine assembly can be manually closed. At the same time, a safety part is provided to ensure that the staple magazine assembly cannot move in the distal direction when it is not installed, so as to avoid affecting the normal assembly of the staple magazine assembly.

[0005] The embodiment of the present application provides a closing switching mechanism, which is provided on the stapler body of the electric stapler, and the closing switching mechanism includes:

[0006] The firing rod is provided with a first matching piece;

[0007] A handle provided with a second matching piece;

[0008] A safety member, comprising at least one stopper, wherein when the safety member is in a first position, the stopper blocks the movement of the firing rod in a distal direction;

[0009] a drive assembly, wherein the drive assembly is configured to be driven to move in a proximal direction when the staple cartridge assembly is mounted on the distal end of the stapler body, so as to drive the safety element to move from the first position to the second position;

[0010] When the safety member is in the second position and the handle moves in the first direction, the second mating member drives the firing rod to move in the distal direction through the first mating member to drive the jaws of the stapler magazine assembly of the electric stapler to close.

[0011] In some embodiments, the stop portion includes a first stop portion, and when the safety member is in the first position, the first stop portion at least partially stops at the distal side of the first mating member; when the safety member is in the second position, the first stop portion disengages from the path of the first mating member moving in the distal direction.

[0012] In some embodiments, the safety member further includes a second stop portion. When the safety member is in the first position, the second stop portion abuts against the second mating member and applies a force away from the firing rod to separate the second mating member from the first mating member.

[0013] In some embodiments, the safety member also includes a pivot portion and a first driving portion, and the pivot portion is rotatably connected to the housing of the stapler. When the drive assembly is driven to move in the proximal direction, the first driving portion is driven to move in the proximal direction so that the safety member rotates along the second direction and reaches the second position.

[0014] In some embodiments, when the safety element is in the first position, the first stop portion and the second stop portion are located on a proximal side of the pivot portion, and the first driving portion is located on a distal side of the pivot portion.

[0015] In some embodiments, a first elastic member is further included, configured to provide a first biasing force to the safety member to rotate along a third direction, wherein the third direction is opposite to the second direction.

[0016] In some embodiments, a second elastic member is further included, which is configured to provide a second biasing force to the second mating member to move it toward the firing rod, and when the safety member moves from the first position to the second position, the second biasing force drives the second mating member to move to abut against the first mating member.

[0017] In some embodiments, the second stop portion is located on a side of the first stop portion facing the handle, and a terminal end of the second stop portion extends toward a proximal direction relative to a terminal end of the first stop portion.

[0018] In some embodiments, the drive assembly includes a first drive member, a second drive member opposite to the first drive member is provided at the proximal end thereof, and a sleeve portion is provided at the distal end thereof. The sleeve portion is sleeved on the outside of the firing rod and can move axially and circumferentially along the stapler relative to the firing rod.

[0019] In some embodiments, the stapler body is also provided with an electric component and a rack, the electric component is configured to drive the rack to move along the axial direction of the stapler, the rack is slidably connected to the firing rod so that the firing rod can move within a preset range along the axial direction relative to the rack.

[0020] In some embodiments, a controller and an electric switch element are further included. The electric switch element is configured to detect the position of the safety element and send a first electric signal to the controller when it is detected that the safety element moves from the first position to the second position.

[0021] In some embodiments, the electrical switch element is disposed on the safety member, or the electrical switch element is disposed on the proximal side of at least one of the stop portions.

[0022] An embodiment of the present application also provides an electric stapler, comprising the above-mentioned closing switching mechanism.

[0023] The closed switching mechanism and electric stapler provided by the present application have the following advantages:

[0024] The present application provides a handle and corresponding matching parts in the electric stapler, so that the operator can manually close the jaws of the stapler assembly. The tissue feedback force received when the jaws are closed can be fed back to the handle through the firing rod. The operator can accurately sense the force feedback when the jaws are closed, avoid excessive squeezing of the tissue or insufficient clamping force, and select a suitable stapler assembly according to the size of the feedback force. At the same time, the present application provides a safety member. When the stapler assembly is not installed, the safety member is in the first position and blocks the movement of the firing rod in the distal direction, ensuring that the stapler assembly cannot move in the distal direction when it is not installed, so as to avoid affecting the normal assembly of the stapler assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0026] Figure 1 It is a structural schematic diagram of a closed switching mechanism and an electric mechanism according to an embodiment of the present application;

[0027] Figure 2 is a schematic diagram of a driving assembly according to an embodiment of the present application;

[0028] Figure 3 and Figure 4 It is a partial structural schematic diagram of the closing switching mechanism when the nail magazine assembly is not installed in one embodiment of the present application;

[0029] Figure 5 and Figure 6 It is a structural schematic diagram of a safety member according to an embodiment of the present application;

[0030] Figure 7 It is a schematic diagram of the cooperation between the firing rod, the safety member and the driving assembly according to an embodiment of the present application;

[0031] Figure 8 is a schematic diagram of a driving assembly driving a safety member according to an embodiment of the present application;

[0032] Fig. 9 and Fig.10 It is a partial structural schematic diagram of a closing switching mechanism when a staple cartridge assembly is installed according to an embodiment of the present application;

[0033] Fig.11 It is a partial structural schematic diagram of the closing switching mechanism when the jaws of the electric stapler are manually closed in one embodiment of the present application.

[0034] Reference numerals:

[0035] 1 firing rod 61 first driving member

[0036] DETAILED DESCRIPTION

[0037] The example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided so that the present application will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. "Or" and "or" in the specification may both mean "and" or "or". Although the terms "upper", "lower", "between", etc. may be used in this specification to describe different exemplary features and elements of the present application, these terms are used herein only for convenience, such as according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the present application. Although "first" or "second" etc. are used in this specification to represent certain features, they are only used to represent the function, and are not used as a limitation on the number and importance of specific features.

[0038] The present application provides a closure switching mechanism, including a firing rod, a handle, a safety member and a driving assembly. The firing rod and the handle are respectively provided with a first mating member and a second mating member. The safety member includes at least one stopper. The present application also provides an electric stapler including the closure switching mechanism, the electric stapler including a stapler body and a stapler assembly, the closure switching mechanism is arranged on the stapler body, and the stapler assembly is detachably arranged at the distal end of the stapler body. The stapler assembly includes a stapler and a nail anvil that are relatively arranged and rotatably connected, and the opening between the stapler and the nail anvil is the jaw of the stapler assembly. When the firing rod moves in the distal direction, the firing rod can drive the jaw of the stapler assembly to close. After the jaw of the stapler assembly is closed, the firing rod is continuously driven to move in the distal direction, which can drive the staples and the cutter in the stapler assembly to suture and cut the tissue, thereby completing the firing of the stapler.

[0039] In the initial state, the stapler assembly is not mounted on the distal end of the stapler body, the safety element is in the first position, and the stopper blocks the movement of the firing rod toward the distal end. At this time, even if the handle is held, the second mating element cannot drive the first mating element to move toward the distal end, thereby maintaining the position stability of the firing rod to avoid affecting the normal assembly of the stapler assembly.

[0040] When the stapler assembly is mounted at the distal end of the stapler body, the drive assembly is driven to move in the proximal direction to drive the safety member to move from the first position to the second position. When the safety member is in the second position and the handle moves in the first direction, the second mating member drives the firing rod to move in the distal direction through the first mating member to drive the jaws of the stapler assembly of the electric stapler to close, and the operator can accurately sense the force feedback when the jaws are closed through the handle.

[0041] The structure of the closed switching mechanism of each specific embodiment of the present application is described in detail below in conjunction with the accompanying drawings. It can be understood that the various specific embodiments are not intended to limit the scope of protection of the present application. In the present application, the distal end and the proximal end are relative to the operator. The distal end is far away from the operator, that is, close to the surgical position, and the proximal end is close to the operator, that is, far away from the surgical position. The axial direction refers to the direction from the distal end to the proximal end or the proximal end to the distal end of the stapler. The S1 direction in the accompanying drawings is the direction from the proximal end of the stapler to the distal end.

[0042] like Figures 1 to 4As shown, the present application provides a closing switching mechanism for an electric stapler. The electric stapler includes a stapler body and a stapler magazine assembly that can be installed at the distal end of the stapler body. The closing switching mechanism is arranged in the stapler body. An electric assembly and a rack 91 are also arranged in the stapler body. The electric assembly includes a motor 93 and a gear set 92. The output shaft of the motor 93 cooperates with the rack 91 through the gear set 92, and can drive the rack 91 to move along the axial direction. For example, when the motor 93 rotates forward, the rack 91 is driven to move in the distal direction, and when the motor 93 rotates reversely, the rack 91 is driven to retreat in the proximal direction. The closing switching mechanism includes a firing rod 1 and a handle 3. The proximal end of the firing rod 1 is slidably connected to the distal end of the rack 91, so that the firing rod 1 can move within a preset range along the axial direction relative to the rack 91. Specifically, the proximal end of the firing rod 1 is provided with a sliding portion 11, the distal end of the rack 91 is provided with a sliding groove 911, the sliding portion 11 is located inside the sliding groove 911 and can slide axially, and the preset range is the maximum range of axial movement of the sliding portion 11 in the sliding groove 911. In another alternative embodiment, a sliding groove can be provided at the proximal end of the firing rod 1, and a sliding portion that enters the sliding groove can be provided at the distal end of the rack 91.

[0043] like Figures 3-4 As shown, the firing rod 1 is provided with a first matching piece 2, and the outer diameter of the first matching piece 2 is larger than the outer diameter of the firing rod 1. The first matching piece 2 and the firing rod 1 are fixedly arranged. For example, the first matching piece 2 is a sleeve sleeved on the outside of the firing rod 1, and the two are fixedly connected by means of a retaining spring, welding, screw connection, etc., or the first matching piece 2 and the firing rod 1 can be an integrally formed part, that is, the first matching piece 2 is a step portion formed on the outer surface of the firing rod 1. The handle 3 is rotatably connected to the shell of the stapler body through a rotating connection portion 32, so that the handle 3 can be rotated in a first direction ( Figure 3 The handle 3 is provided with a third elastic member, which is configured to provide the handle 3 with a fourth direction (opposite to the first direction, Figure 3A third biasing force is applied to the handle 3 to rotate the handle 3 in a counterclockwise direction. After the handle 3 is released, the handle 3 can return to the initial position under the action of the third biasing force. In this embodiment, the third elastic member is a third torsion spring 73 provided at the rotation fitting portion, but the present application is not limited to this. The side of the handle 3 away from the firing rod 1 includes an operating portion 31, and the side of the handle 3 facing the firing rod 1 is provided with a second fitting member 4. The second fitting member 4 is rotatably connected to the handle 3. A second elastic member is also provided at the second fitting member 4, which is configured to apply a second biasing force to the second fitting member 4 to make it move toward the direction of the firing rod 1. In this embodiment, the second elastic member is a second torsion spring 72 provided on the second fitting member 4, but the present application is not limited to this.

[0044] like Figure 1 and Figure 2 As shown, the closed switching mechanism also includes a safety member 5 and a drive assembly 6. The drive assembly 6 includes a first drive member 61, a second drive member 62 and a third drive member 63 which are arranged in sequence from the proximal end to the distal end, and the distal end of the third drive member 63 extends to the distal end of the stapler body. The proximal end of the first drive member 61 includes a second drive portion 611. When the stapler assembly is installed at the distal end of the stapler body, the third drive member 63 is driven to move in the proximal direction, and the first drive member 61 is driven to move in the proximal direction through the second drive member 62. Figures 3 to 6 As shown, the safety member 5 includes a first stopper 51, a second stopper 52, a pivot portion 54 and a first drive portion 53. The first drive portion 53 is aligned with the second drive portion 611 in the axial direction. The safety member 5 is rotatably mounted on the housing of the stapler body through a pin 55 in the pivot portion 54. Figure 3 , Figure 4 The first position shown and Fig. 9 , Fig.10 The safety member 5 can be an integrally formed part, and the first stopper 51 and the second stopper 52 are stopper arms extending from the pivot part 54. Alternatively, the safety member 5 can be assembled from a plurality of separate parts, for example, one or more of the first stopper 51, the second stopper 52, and the first driving part 53 are separately formed and then assembled to the pivot part 54. In this embodiment, when the safety member 5 is in the first position, the first stopper 51 and the second stopper 52 respectively play a role of stopping the first matching member 2 and the second matching member 4. In other alternative embodiments, only one of the first stopper 51 and the second stopper 52 can be selected, for example, only the first stopper 51 is provided on the safety member 5, or only the second stopper 52 is provided on the safety member 5, which also falls within the protection scope of the present application.

[0045] When the safety member 5 is in the first position, the first stopper 51 and the second stopper 52 are located on the proximal side of the pivot portion 54, and the first driving portion 53 is located on the distal side of the pivot portion 54. The second stopper 52 is located on the side of the first stopper 51 facing the handle 3, and the end of the second stopper 52 extends toward the proximal side relative to the end of the first stopper 51. When the first driving member 61 is driven to move in the proximal direction, the second driving portion 611 drives the first driving portion 53 to move in the proximal direction, so as to drive the safety member 5 to move in the second direction ( Figure 3 In the clockwise direction) in the middle, the safety member 5 is rotated to move from the first position to the second position. Fig. 9 In the perspective of , the first stopper 51 and the second stopper 52 are lifted upward. The safety member 5 is also provided with a first elastic member, which is configured to provide the safety member 5 with an elastic force to move along the third direction ( Figure 3 , Fig. 9 The first biasing force of the first elastic member is a first torsion spring 71 provided on the pin 55, but the present application is not limited thereto.

[0046] like Figure 3 and Figure 4 As shown, in the initial state, the stapler assembly is not installed at the distal end of the stapler body. At this time, the second driving portion 611 of the first driving member 61 is located at the distal side of the first driving portion 53 of the safety member 5, and there is a certain axial distance between the two, so that the second driving portion 611 does not contact the first driving portion 53, and the sliding portion 11 of the firing rod 1 is located at the proximal end of the slide groove 911. Under the action of the first biasing force of the first torsion spring 71, the safety member 5 is maintained in the first position. The first stop portion 51 is at least partially stopped at the distal side of the first mating member 2, and the second stop portion 52 is abutted against the second mating member 4 and applies a force away from the firing rod 1, so that the second mating member 4 is separated from the first mating member 2, and the second torsion spring 72 is torsionally deformed. Figure 3 and Figure 4 In this state, even if the operator holds the operating part 31 of the handle 3, under the action of the second stop part 52, the second matching part 4 cannot contact the first matching part 2, and cannot drive the firing rod 1 to move in the distal direction. Moreover, under the action of the first stop part 51, the firing rod 1 cannot move in the distal direction, thereby maintaining the position stability of the firing rod 1 and avoiding affecting the normal assembly of the nail magazine assembly.

[0047] like Figure 7 and Figure 8As shown, the first driving member 61 includes a rod portion 613, the proximal end of the rod portion 613 is provided with the second driving portion 611, the distal end of the rod portion 613 is provided with a sleeve portion 612, the sleeve portion 612 is provided with a hole, through which the sleeve portion 612 is sleeved on the outside of the firing rod 1, and can move axially and circumferentially relative to the firing rod 1 along the stapler, thereby playing a central fixing role of the first driving member 61, and when the stapler assembly rotates around the axis, the firing rod 1 also rotates relative to the shell of the stapler body, and the sleeve portion 612 of the first driving member 61 is rotatably connected to the firing rod 1, so that the first driving member 61 can not rotate relative to the shell of the stapler body. The second driving portion 611 is bent outwardly relative to the rod portion 613, so that the second driving portion 611 is better aligned with the first driving portion 53 in the axial direction. When the stapler assembly is installed at the distal end of the stapler body, the first driving member 61 is driven to move in the proximal direction, and the second driving portion 611 abuts against the first driving portion 53 and drives the first driving portion 53 to move in the proximal direction, so that the safety member 5 rotates from the first position to the second direction. Fig. 9 and Fig.10 The second position is shown.

[0048] like Fig. 9 and Fig.10 As shown, when the safety member 5 is in the second position, the first stopper 51 and the second stopper 52 move upward, and the first stopper 51 is separated from the path of the first mating member 2 moving in the distal direction, and no longer blocks the movement of the firing rod 1 in the distal direction. The second stopper 52 no longer blocks the second mating member 4. Figure 3 ), the second matching member 4 moves toward the firing rod 1 until the second matching member 4 abuts against the first matching member 2. Fig. 9 and Fig.11 As shown, at this time, the operator holds the operating portion 31 of the handle 3 so that the handle 3 moves along the first direction ( Fig. 9 The second mating member 4 abuts against the first mating member 2 and drives the firing rod 1 to move in the distal direction, so as to drive the jaws of the stapler assembly of the electric stapler to close, and the sliding portion 11 of the firing rod 1 moves from the proximal end to the distal end of the slide groove 911. During the jaw closing process, the operator can accurately sense the force feedback from the tissue through the handle 3 to avoid excessive squeezing of the tissue or insufficient clamping force, and can select a suitable stapler assembly according to the magnitude of the feedback force.

[0049] After the jaws of the staple cartridge assembly are closed, the handle 3 is released, and the handle 3 is released by the third torsion spring 73 (shown in FIG. Figure 3) can return to the initial position under the action of the third biasing force. The operator can start the motor 93 by pressing a button, and the motor 93 drives the rack 91 to move toward the distal end, and the rack 91 drives the firing rod 1 to move toward the distal end, thereby completing the firing of the stapler.

[0050] After the stapler is fired, the firing rod 1 returns to its initial position. When the stapler assembly needs to be replaced, the stapler assembly is removed from the distal end of the stapler body, and the drive assembly 6 moves in the distal direction to return to the initial position and no longer abuts against the safety member 5. Under the first biasing force of the first torsion spring 71, the safety member 5 rotates along the third direction and returns to the first position, and the first stopper 51 stops at the distal side of the first mating member 2 again, and the second stopper 52 stops between the second mating member 4 and the first mating member 2 again, forming a safety state again, that is, keeping the firing rod 1 from moving in the distal direction.

[0051] Optionally, the closed switching mechanism further includes a controller and an electric switch element, wherein the electric switch element is configured to detect the position of the safety member 5, and when the safety member 5 moves from the first position to the second position, sends a first electric signal to the controller. When the controller receives the first electric signal, it indicates that the current staple cartridge assembly has been installed at the distal end of the stapler body, and the controller can perform a predetermined action after the staple cartridge assembly is assembled according to a preset program. Further, the electric switch element can also send a second electric signal to the controller when it detects that the safety member 5 moves from the second position to the first position. When the controller receives the second electric signal, it indicates that the current staple cartridge assembly is not installed or has been removed from the distal end of the stapler body, and the controller can perform a predetermined action when the staple cartridge assembly is not assembled according to a preset program. Optionally, the electric switch element can be directly arranged on the safety member 5 to detect the rotation angle or displacement of the safety member 5. Alternatively, the electrical switch element may be disposed on the proximal side of at least one of the stop portions, such as on the proximal side of the first stop portion 51 or on the proximal side of the second stop portion 52 , so that the electrical switch element may be contacted and triggered when the safety element 5 rotates.

[0052] The above content is a further detailed description of the present application in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A closed switching mechanism, characterized in that: The stapler body provided on the electric stapler, the closing switching mechanism comprises: The firing rod is provided with a first matching piece; A handle provided with a second matching piece; A safety member, comprising at least one stopper, wherein when the safety member is in a first position, the stopper blocks the movement of the firing rod in a distal direction; a drive assembly, wherein the drive assembly is configured to be driven to move in a proximal direction when the staple cartridge assembly is mounted on the distal end of the stapler body, so as to drive the safety element to move from the first position to the second position; When the safety member is in the second position and the handle moves in the first direction, the second mating member drives the firing rod to move in the distal direction through the first mating member to drive the jaws of the stapler magazine assembly of the electric stapler to close.

2. The closed switching mechanism according to claim 1, characterized in that: The stop portion includes a first stop portion. When the safety member is in the first position, the first stop portion at least partially stops the distal side of the first matching member; when the safety member is in the second position, the first stop portion disengages from the path of the first matching member moving toward the distal direction.

3. The closed switching mechanism according to claim 2, characterized in that: The safety member further comprises a second stop portion. When the safety member is in the first position, the second stop portion abuts against the second mating member and applies a force away from the firing rod to separate the second mating member from the first mating member.

4. The closed switching mechanism according to claim 3, characterized in that: The safety member also includes a pivot portion and a first driving portion, wherein the pivot portion is rotatably connected to the housing of the stapler, and when the driving assembly is driven to move in the proximal direction, the first driving portion is driven to move in the proximal direction, so that the safety member rotates in the second direction to reach the second position.

5. The closed switching mechanism according to claim 4, characterized in that: When the safety element is in the first position, the first stop portion and the second stop portion are located on the proximal side of the pivot portion, and the first driving portion is located on the distal side of the pivot portion.

6. The closed switching mechanism according to claim 4, characterized in that: The invention also includes a first elastic member configured to provide a first biasing force to the safety member to rotate along a third direction, wherein the third direction is opposite to the second direction.

7. The closed switching mechanism according to claim 3, characterized in that: It also includes a second elastic member configured to provide a second biasing force to the second mating member to move it toward the firing rod, and when the safety member moves from the first position to the second position, the second biasing force drives the second mating member to move to abut against the first mating member.

8. The closed switching mechanism according to claim 3, characterized in that: The second stop portion is located on a side of the first stop portion facing the handle, and a terminal end of the second stop portion extends toward a proximal side relative to a terminal end of the first stop portion.

9. The closed switching mechanism according to claim 4, characterized in that: The drive assembly includes a first drive member, a second drive member opposite to the first drive member is provided at the proximal end thereof, and a sleeve portion is provided at the distal end thereof. The sleeve portion is sleeved on the outside of the firing rod and can move axially and circumferentially along the stapler relative to the firing rod.

10. The closing switching mechanism according to claim 1, characterized in that: The stapler body is also provided with an electric component and a rack, wherein the electric component is configured to drive the rack to move along the axial direction of the stapler, and the rack is slidably connected to the firing rod so that the firing rod can move within a preset range along the axial direction relative to the rack.

11. The closing switching mechanism according to claim 1, characterized in that: The device also includes a controller and an electric switch element, wherein the electric switch element is configured to detect the position of the safety element and send a first electric signal to the controller when detecting that the safety element moves from the first position to the second position.

12. The closing switching mechanism according to claim 11, characterized in that: The electrical switch element is arranged on the safety member, or the electrical switch element is arranged on the proximal side of at least one of the stoppers.

13. An electric stapler, characterized in that: The invention comprises the closing switching mechanism according to any one of claims 1 to 12.

Images