Emergency rollback operating mechanism, emergency rollback device and surgical anastomat

Abstract

The utility model provides an emergency rollback operating mechanism, an emergency rollback device and a surgical anastomat, the mechanism comprises: a cover body which is detachably mounted on a housing of the surgical anastomat and is provided with a first mounting part; the operating part is provided with a second mounting part and a first driving part, and the second mounting part is movably connected with the first mounting part, so that the operating part can move relative to the cover body and can be switched between a folded state and an unfolded state; when the first driving part is connected with the transmission assembly, the first driving part is configured to be capable of driving at least part of the transmission assembly to move towards the near end of the anastomat. The emergency rollback operation mechanism is simple in structure and convenient to use, and the complexity of the shell and the complexity of the machine frame cannot be additionally increased.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an emergency retraction operating mechanism, an emergency retraction device and a surgical stapler. Background Art

[0002] In the prior art, a surgical stapler includes a stapler body and an actuator installed at the distal end of the stapler body. During the operation, the tissue is placed between the anvil of the actuator and the stapler of the stapler assembly, the distance between the anvil and the stapler is adjusted to gradually clamp the tissue, and then the firing assembly in the stapler body is driven to move in the distal direction, so that the staples are formed on the anvil to complete the tissue anastomosis. In an electric stapler, the movement of the firing assembly is directly driven by a motor, and the doctor does not need to apply a large force during the firing process, which improves the doctor's user experience, and the firing process is more controllable. Therefore, the electric stapler plays a vital role in modern surgical operations. In the electric stapler, the emergency retraction structure ensures the emergency operation function of the electric stapler when it fails, and improves the reliability of the electric stapler. In the existing design, a wrench-like part is usually used for emergency retraction operation. During normal use, the wrench is stored in the stapler body of the electric stapler.

[0003] A frame is provided inside the shell of the stapler body. When the wrench is stored, the wrench is relatively fixed to the frame, and a wrench avoidance and fixing structure needs to be provided on the frame, which increases the structural complexity of the frame. Moreover, since the frame is generally a plastic part formed by demolding, the increased structural complexity also complicates the manufacturing process of the frame. In addition, in order to fix the wrench, an additional positioning and fixing structure for the wrench is often provided on the shell, which makes the structure and manufacturing process of the shell more complicated. Utility Model Content

[0004] In view of the problems in the prior art, the purpose of the present application is to provide an emergency retraction operating mechanism, an emergency retraction device and a surgical stapler, which will not increase the complexity of the shell and the frame, have a simple structure and are easy to use.

[0005] A first aspect of the present application provides an emergency retraction operating mechanism, which is applied to a surgical stapler, wherein the surgical stapler includes a shell and a transmission assembly at least partially disposed inside the shell, wherein the mechanism includes: a cover body, which is provided with a first mounting portion, and the cover body is detachably mounted on the shell of the surgical stapler; an operating member, which is provided with a second mounting portion and a first driving portion, and the second mounting portion is movably connected to the first mounting portion so that the operating member can move relative to the cover body and switch between a stored state and a deployed state; wherein, when the first driving portion is connected to the transmission assembly, the first driving portion is configured to drive the transmission assembly to move at least partially toward the proximal direction of the stapler.

[0006] In some embodiments, the first mounting portion and the second mounting portion are rotatably connected.

[0007] In some embodiments, the first mounting portion protrudes from the first side surface of the cover body, the second mounting portion is provided with a mounting groove, the first mounting portion is embedded in the mounting groove, and the first mounting portion and the second mounting portion are rotatably connected via a rotating shaft.

[0008] In some embodiments, a accommodating cavity is provided on the first side of the cover body, and when the operating member is in the storage state, one end of the operating member having the first driving portion is at least partially located in the accommodating cavity, and when the operating member is in the expanded state, one end of the operating member having the first driving portion is located outside the accommodating cavity.

[0009] In some embodiments, when the operating member is in the storage state and the cover body is installed on the shell, the operating member is parallel to the axial direction of the stapler; when the operating member is in the expanded state, the operating member is perpendicular to the extension plane of the cover body.

[0010] In some embodiments, the transmission assembly includes a drive shaft, and the drive shaft is parallel to the longitudinal direction of the stapler. When the first drive portion is connected to the drive shaft, the operating member is parallel to the longitudinal direction.

[0011] In some embodiments, the operating member is columnar, the first driving portion is a hole, and when the driving shaft is embedded in the hole, the first driving portion and the driving shaft form a non-rotatable connection.

[0012] In some embodiments, the transmission assembly includes a drive shaft, the shell is provided with an opening, the cover body is detachably mounted at the opening by at least one assembly portion, and the operating member can at least partially pass through the opening to connect the first drive portion with the drive shaft.

[0013] A second aspect of the present application further provides an emergency retraction device, comprising a transmission assembly and the emergency retraction operating mechanism.

[0014] A third aspect of the present application further provides a surgical stapler, comprising the emergency retraction operating mechanism of the first aspect or the emergency retraction device of the second aspect.

[0015] The emergency retraction operating mechanism, emergency retraction device and surgical stapler provided by the present application have the following advantages:

[0016] The emergency retraction operating mechanism is realized by the cover body on the shell, and the operating member and the cover body are movably connected to form a structure. There is no need to add complex structures to the shell and frame of the surgical stapler. When the emergency retraction operation is not needed, the operating member is set in a storage state and the cover body is fixed to the shell, which can reduce the space occupied by the emergency retraction operating mechanism. When it is needed, the cover body is removed from the shell, and after the operating member is adjusted to the expanded state, the operating member can cooperate with the transmission assembly to realize the emergency retraction function. The structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 is a partial structural schematic diagram of a surgical stapler according to an embodiment of the present application;

[0019] Figure 2 and Figure 3 This is a structural schematic diagram of an emergency retracting operating mechanism in a stowed state according to an embodiment of the present application;

[0020] Figure 4 This is a structural schematic diagram of an emergency retracting operating mechanism in an unfolded state according to an embodiment of the present application;

[0021] Figure 5 is an exploded view of an emergency retraction operating mechanism according to an embodiment of the present application;

[0022] Figure 6 is a schematic diagram of an emergency retraction operating mechanism and a drive shaft aligned with each other in one embodiment of the present application;

[0023] Figure 7 It is a schematic diagram of the cooperation between the emergency retraction operating mechanism and the drive shaft in one embodiment of the present application;

[0024] Figure 8 It is a schematic diagram showing that the emergency retracting operating mechanism according to an embodiment of the present application can be stored along the R2 direction after use.

[0025] Reference numerals:

[0026] 10 Emergency retraction operating mechanism 1211 installation slot

[0027] 11 Cover 122 Second mounting hole

[0028] 111 first mounting portion 123 first driving portion

[0029] 112 First mounting hole 13 Rotation axis

[0030] 113 First assembly part 20 Motor

[0031] 1131 support part 30 transmission assembly

[0032] 1132 elastic part 31 transmission part

[0033] 1133 Clamping portion 311 Rack surface

[0034] 114 Second assembly part 32 Gear set

[0035] 119 accommodating cavity 33 driving shaft

[0036] 12 Operating member 331 Second driving unit

[0037] 121 second mounting portion 40 housing DETAILED DESCRIPTION

[0038] 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.

[0039] The present application provides an emergency retraction operating mechanism, an emergency retraction device and a surgical stapler including the same. The surgical stapler includes a shell and a transmission assembly at least partially arranged inside the shell. The emergency retraction device includes the transmission assembly and the emergency operating mechanism. The mechanism includes a cover body and an operating member. The cover body is provided with a first mounting portion, and the cover body is detachably mounted on the shell of the surgical stapler. The operating member is provided with a second mounting portion and a first driving portion, and the second mounting portion is movably connected to the first mounting portion so that the operating member can move relative to the cover body and switch between a storage state and an expanded state. When the operating member is in the storage state, it can be stored on one side of the cover body to reduce the space occupied by the emergency retraction operating mechanism as a whole. When the first driving portion is connected to the transmission assembly, the first driving portion is configured to drive the transmission assembly to move at least partially toward the proximal direction of the stapler to realize the emergency retraction function of the stapler.

[0040] Therefore, the emergency retraction operating mechanism is realized through the cover body on the shell, and the operating member and the cover body are movably connected to form a structure, without adding a complex structure to the shell and the frame of the surgical stapler. When the emergency retraction operation is not needed, the operating member is set in the storage state, and the cover body is fixed to the shell, which can reduce the space occupied by the emergency retraction operating mechanism, and has little intrusion on the shell and the frame inside the shell. When it is needed, the cover body is removed from the shell, and after adjusting the operating member to the unfolded state, the operating member can cooperate with the transmission assembly to realize the emergency retraction function, which has a simple structure and is easy to use.

[0041] The structures of the emergency retracting operating mechanisms of various specific embodiments of the present application are 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 protection scope of the present application.

[0042] Figure 1 The figure shows the partial structure of a surgical stapler according to an embodiment of the present application. The emergency retraction operating mechanism 10 of the present application can be applied to an electric stapler, but is not limited thereto. It can also be applied to a manually operated stapler. When the normal manual retraction mechanism of the surgical stapler fails, the emergency retraction is achieved by the emergency retraction operating mechanism 10. The following description will be made by taking the stapler as an electric stapler as an example, but it is not intended to limit the scope of protection of the present application. The surgical stapler includes a stapler body and an actuator (not shown in the figure) disposed at the distal end of the stapler body. The stapler body includes a shell 40 and a transmission assembly at least partially disposed inside the shell 40. The shell 40 is provided with an opening (not shown in the figure) connecting the outside of the shell 40 and the inner cavity of the shell 40. As shown in FIG. Figures 1 to 4As shown, the emergency retreat operating mechanism 10 includes a cover 11 and an operating member 12. The cover 11 is provided with at least one assembly portion and a first mounting portion 111. The cover 11 is detachably mounted at the opening of the housing 40 through the assembly portion. The shape of the cover 11 can be optionally adapted to the shape of the opening so that the cover 11 closes the opening. Figure 6 As shown, the emergency retraction device includes an emergency retraction operating mechanism 10 and a transmission assembly 30 .

[0043] like Figure 5 As shown, in this embodiment, the assembly part includes a first assembly part 113 and a second assembly part 114 provided at both axial ends of the cover body 11, the first assembly part 113 includes a support part 1131 and an elastic part 1132, the elastic part 1132 is connected to the support part 1131, and at least one clamping part 1133 is provided on the outer side of the elastic part 1132. When the cover body 11 is installed on the shell, the second assembly part 114 is firstly made to at least partially enter the opening, the elastic part 1132 of the first assembly part 113 is firstly elastically deformed by the force of the inner wall of the opening of the shell, and approaches the support part 1131, so that the first assembly part 113 can at least partially enter the opening, and then the elastic part 1132 is stretched outward under the action of the elastic restoring force, and the first assembly part 113 is clamped at the inner wall of the opening by the clamping part 1133, thereby completing the installation of the cover body 11. When it is necessary to remove the cover 11, press the elastic part 1132 to bring it close to the support part 1131, so that the first assembly part 113 can be separated from the shell first, and then the second assembly part 114 can be separated from the shell, so that the cover 11 is separated from the shell. Here, only an exemplary structural implementation method of detachable installation of the cover 11 and the shell is shown, and the present application is not limited thereto. The number and setting position of the assembly parts can be changed as needed, for example, three, four or other number of assembly parts are set, the assembly parts are set on the left and right sides, the second assembly part is elastic, or at least a part of the first assembly part is elastic, and at least a part of the second assembly part is also elastic, etc., all belong to the protection scope of the present application.

[0044] like Figures 2 to 5As shown, the operating member 12 is provided with a second mounting portion 121 and a first driving portion 123, and the second mounting portion 121 is movably connected to the first mounting portion 111, so that the operating member 12 and the cover body 11 are movably connected to form a structure, and the operating member 12 can move relative to the cover body 11, so that the operating member 12 can switch between the storage state and the deployment state. When the operating member 12 is in the storage state, the operating member 12 can be stored on one side of the cover body 11 to reduce the space occupied by the emergency retraction operating mechanism 10 as a whole. When the first driving portion 123 is connected to the transmission assembly, the first driving portion 123 is configured to drive the transmission assembly to at least partially move toward the proximal direction of the stapler to achieve the emergency retraction function. Therefore, the emergency retraction operating mechanism 10 does not need to add complex structures to the shell frame of the surgical stapler. When the emergency retraction operation is not needed, the operating member 12 is set in the storage state and the cover body 11 is fixed to the shell. This can reduce the space occupied by the emergency retraction operating mechanism 10. When it is needed, the cover body 11 is removed from the shell, and the operating member 12 is adjusted to the expanded state. The operating member 12 can cooperate with the transmission assembly to realize the emergency retraction function. The structure is simple and easy to use.

[0045] In the present application, the distal end and the proximal end are relative to the operator, the end closer to the operator is the proximal end, the end farther from the operator, that is, the end closer to the surgical site is the distal end, and the direction along the axis of the stapler is the axial direction, that is, the direction from the distal end to the proximal end of the stapler, or from the proximal end to the distal end of the stapler. Definition Figure 1 The S1 direction is from the distal end to the proximal end of the stapler, and the S1 direction or the reverse direction of S1 is the axial direction of the stapler. Figure 1 In the present application, for a component, the inside and outside are relative to the center of the component, the side close to the center of the component is the inside, and the side away from the center of the component is the outside.

[0046] In this embodiment, if Figures 2 to 5 As shown, the first mounting portion 111 and the second mounting portion 121 are rotatably connected via a rotating shaft 13, so that the operating member 12 can rotate relative to the cover body 11 around the axis of the rotating shaft 13, thereby switching between the storage state and the unfolded state. Figure 2 and Figure 3 In the embodiment, the operating member 12 is in the storage state. Figure 4 In the embodiment, the operating member 12 is in the unfolded state. When the operating member 12 is in the retracted state, the operating member 12 is moved along Figure 3The cover 11 can be put into the unfolded state by rotating a certain angle around the axis of the rotation axis 13 in the middle R1 direction. Specifically, the first mounting portion 111 protrudes from the first side surface of the cover body 11. Here, the first side of the cover body 11 is the side of the cover body 11 facing the inner cavity of the shell, so that when the operating member 12 is received in the cover body 11 and the cover body 11 is installed in the shell, the operating member 12 at least partially enters the inner cavity of the shell without affecting the external structure of the shell. The second mounting portion 121 is provided with a mounting groove 1211, and the first mounting portion 111 is embedded in the mounting groove 1211, and the first mounting portion 111 and the second mounting portion 121 are rotatably connected through the rotation axis 13, and the rotation axis 13 is simultaneously passed through the first mounting hole 112 of the first mounting portion 111 and the second mounting hole 122 of the second mounting portion 121. Only one embodiment of the rotatable connection between the first mounting portion 111 and the second mounting portion 121 is shown here by way of example and is not intended to limit the scope of protection of the present application. Other structures that can achieve rotatable connection between the two may also be applied to the present application. For example, the first mounting portion 111 does not protrude from the first side surface of the cover body 11, and the second mounting portion 121 is directly connected to a certain position on the first side surface of the cover body 11.

[0047] like Figures 2 to 5 As shown, a housing cavity 119 is provided on the first side of the cover body 11. When the operating member 12 is in the storage state, the operating member 12 is substantially parallel to the axial direction of the stapler, and one end of the operating member 12 provided with the first driving portion 123 is at least partially located in the housing cavity 119. At this time, the volume of the emergency retraction operating mechanism 10 is small, and the space occupied in the longitudinal direction is also small. When the operating member 12 is in the expanded state, the operating member 12 is perpendicular to the extended plane of the cover body 11, and one end of the operating member 12 provided with the first driving portion 123 is located outside the housing cavity 119, so that the first driving portion 123 can protrude from the bottom of the cover body 11 and cooperate with the transmission assembly.

[0048] like Figure 6 and Figure 7As shown, the transmission assembly 30 includes a transmission member 31, a gear set 32 ​​and a drive shaft 33. The stapler body also includes a motor 20 for driving the transmission assembly 30. The transmission member 31 is parallel to the axial direction of the stapler, and a rack surface 311 is provided on one side of the transmission member 31, and the gear set 32 ​​is at least partially meshed with the rack surface 311. The gear set 32 ​​includes one or more mutually meshing gears, one of which is connected to the output shaft of the motor 20, and one gear is meshed with the rack surface 311. The drive shaft 33 is installed in a gear to form a non-rotatable connection, and a second drive part 331 is provided at one end of the drive shaft 33. The second drive part 331 is arranged opposite to the opening of the shell, so that after the cover body 11 is removed from the shell, the first drive part can pass through the opening of the shell and enter the inner cavity of the shell and connect with the second drive part 331. When the motor 20 rotates forward and reverse, the driving force of the motor 20 can be transmitted to the transmission member 31 through the gear set 32, and the rotational motion of the gear set 32 ​​is converted into the axial motion of the transmission member 31 through the cooperation between the gear set 32 ​​and the rack surface 311.

[0049] A firing assembly is provided at the distal end of the transmission member 31. When the stapler has not failed, the transmission member 31 can be driven to move in the distal direction by the forward rotation of the motor 20 to drive the firing assembly, and the staplers in the stapler magazine of the actuator are pushed toward the anvil by the firing assembly to achieve the firing of the stapler. After the firing of the stapler is completed, the transmission member 31 can be driven to move in the proximal direction by the reverse rotation of the motor 20 to achieve the retraction process of the stapler. When the stapler fails, the retraction process cannot be achieved by the reverse rotation of the motor 20. At this time, the gear set 32 ​​can be at least partially disengaged from the motor 20 (for example, the gear connected to the motor 20 is separated from the motor 20, or the gear connected to the motor 20 is separated from the gear connected to the transmission member 31), so that the transmission assembly 30 is no longer affected by the motor 20. Then, the cover body 11 is removed from the housing 40, and the operating member 12 is rotated around the rotation axis to put it into the expanded state, and then the first driving portion 123 of the operating member 12 is aligned with the second driving portion 331 of the drive shaft 33 (such as Figure 6 As shown), the first driving part 123 and the second driving part 331 form a non-rotatable connection (as shown Figure 7 At this time, the cover body 11 is rotated, and the cover body 11 drives the drive shaft 33 to rotate around the axis of the drive shaft 33 through the operating member 12. The drive shaft 33 drives the gear connected to the transmission member 31 to rotate, so that the transmission member 31 moves toward the proximal direction, thereby realizing the emergency retraction function of the stapler. After the emergency retraction is completed, the operating member 12 is separated from the drive shaft 33, and the operating member 12 is moved along the Figure 8 The operating member 12 is rotated in the R2 direction around the axis of the rotating shaft 13 to return to the storage state again, and then the cover body 11 can be installed back to the opening of the shell 40.

[0050] like Figure 1 , 5 As shown in Figures 1 to 7, the drive shaft 33 is parallel to the longitudinal direction of the stapler. The opening of the shell 40 is located at the top of the shell 40, and the opening is aligned with the second drive portion 331 in the longitudinal direction. The cover body 11 is an end cover arranged on the top of the shell 40. When the first drive portion 123 is connected to the drive shaft 33, the operating member 12 is parallel to the longitudinal direction. This is only an exemplary embodiment. In other alternative embodiments, a second drive portion 331 parallel to other directions along the extension direction may also be provided, and the opening may be provided at other positions of the shell 40, such as on a side wall, and the cover body 11 may be installed on the side wall of the shell 40, etc., all of which are within the scope of protection of the present application.

[0051] like Figures 5 to 7 As shown, the operating member 12 is columnar, and the first driving portion 123 is a hole provided at one end surface of the operating member 12. When the first driving portion 123 is connected to the second driving portion 331, the driving shaft 33 is embedded in the hole, and the first driving portion 123 and the second driving portion 331 form a non-rotatable connection, that is, the rotational movement of the first driving portion 123 can drive the rotational movement of the second driving portion 331. In this embodiment, the first driving portion 123 and the second driving portion 331 are connected by threads, for example, that is, the inner wall of the first driving portion 123 is provided with internal threads, and the outer wall of the second driving portion 331 is provided with external threads, so that the two form a non-rotatable connection. In another embodiment, the first driving part 123 can also be set as a waist-shaped hole, and the second driving part 331 can be set as a waist-shaped part, or a ridge parallel to the longitudinal direction can be set in the first driving part 123, and a corresponding groove parallel to the longitudinal direction can be set in the second driving part 331, etc., which can achieve a non-rotatable connection between the first driving part 123 and the second driving part 331 and can make the first driving part 123 and the second driving part 331 relatively separated along the longitudinal direction, all of which fall within the protection scope of the present application.

[0052] In the above embodiments, the relative motion between the operating member and the cover body is described as a rotational motion around a rotation axis, but the present application is not limited thereto. The operating member and the cover body may also be connected in other ways, for example, a linear slide rail is provided in the cover body, the operating member may slide along the linear slide rail, when the operating member is in the storage state, the operating member is at least partially located in the cover body, when the operating member slides along the linear slide rail toward the outside of the cover body until the first driving part protrudes outside the cover body, the operating member enters the expanded state, which also falls within the protection scope of the present application.

[0053] 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. An emergency retraction operating mechanism, characterized in that: Applied to a surgical stapler, the surgical stapler comprises a housing and a transmission assembly at least partially disposed inside the housing, the mechanism comprising: A cover body is provided with a first mounting portion, and the cover body is detachably mounted on the housing of the surgical stapler; An operating member, provided with a second mounting portion and a first driving portion, wherein the second mounting portion is movably connected to the first mounting portion so that the operating member can move relative to the cover body and switch between a stowed state and an unfolded state; Wherein, when the first driving part is connected to the transmission assembly, the first driving part is configured to drive the transmission assembly to move at least partially toward the proximal end direction of the stapler.

2. The emergency retraction operating mechanism according to claim 1, characterized in that: The first mounting portion and the second mounting portion are rotatably connected.

3. The emergency retraction operating mechanism according to claim 2, characterized in that: The first mounting portion protrudes from the first side surface of the cover body, the second mounting portion is provided with a mounting groove, the first mounting portion is embedded in the mounting groove, and the first mounting portion and the second mounting portion are rotatably connected via a rotating shaft.

4. The emergency retreat operating mechanism according to claim 1, characterized in that: A accommodating cavity is provided on the first side of the cover body. When the operating member is in the storage state, one end of the operating member provided with the first driving part is at least partially located in the accommodating cavity. When the operating member is in the expanded state, one end of the operating member provided with the first driving part is located outside the accommodating cavity.

5. The emergency retraction operating mechanism according to claim 1, characterized in that: When the operating member is in the stored state and the cover body is installed on the shell, the operating member is parallel to the axial direction of the stapler; when the operating member is in the expanded state, the operating member is perpendicular to the extended plane of the cover body.

6. The emergency retreat operating mechanism according to claim 1, characterized in that: The transmission assembly includes a driving shaft, and the driving shaft is parallel to the longitudinal direction of the stapler. When the first driving part is connected to the driving shaft, the operating member is parallel to the longitudinal direction.

7. The emergency retraction operating mechanism according to claim 6, characterized in that: The operating member is columnar, the first driving portion is a hole, and when the driving shaft is embedded in the hole, the first driving portion and the driving shaft form a non-relatively rotatable connection.

8. The emergency retreat operating mechanism according to claim 1, characterized in that: The transmission assembly includes a driving shaft, the shell is provided with an opening, the cover is detachably mounted at the opening through at least one assembly portion, and the operating member can at least partially pass through the opening to connect the first driving portion with the driving shaft.

9. An emergency retreat device, characterized in that: It comprises a transmission assembly and the emergency retreat operating mechanism according to any one of claims 1 to 8.

10. A surgical stapler, characterized in that: It comprises the emergency retreat operating mechanism according to any one of claims 1 to 8 or the emergency retreat device according to claim 9.

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