CN115721357A - Resetting device and surgical operation instrument - Google Patents

Abstract

The application provides a resetting means and surgical instrument, resetting means includes: a transmission member that is driven to move in an axial direction of the transmission member; the electric mechanism is configured to provide power for the transmission component to move axially; the transmission mechanism is connected with the electric mechanism and the transmission component in a first state, and is separated from the electric mechanism in a second state; a first operating mechanism configured to be operable to drive the transport mechanism from a first state into a second state; and the second operating mechanism is configured to be operated to drive the transmission component to move along the axial direction of the transmission component when the transmission mechanism is in the second state. According to the transmission mechanism, the transmission mechanism can be separated from the electric mechanism through the first operating mechanism, and the transmission component can be driven to move through the second operating mechanism so as to retreat and reset.

Description

Resetting device and surgical operation instrument

Technical Field

The application relates to the technical field of medical instruments, in particular to a resetting device and a surgical operation instrument.

Background

In the prior art, some surgical instruments are used in which a surgeon operates a firing mechanism at a proximal end to drive a drive shaft to move distally and to drive a distal actuator to perform a corresponding surgical operation. Taking a surgical stapler as an example, a conventional surgical stapler includes a stapler body, a firing handle movably connected to the stapler body, and a staple head portion engaged with the stapler body. The stapler body includes a transmission member. In the operation process, the tissue is placed between the nail anvil and the nail bin at the nail head part, the distance between the nail anvil and the nail bin is adjusted to gradually clamp the tissue, and then the transmission component is driven to move towards the far end by the operation handle, so that the anastomotic nail is formed at the nail anvil to finish the anastomosis of the tissue.

In the using process, a doctor usually needs to apply a larger acting force to a firing mechanism (such as a firing handle) to complete the operation, and the use is very inconvenient. Thus, further motor driven surgical instruments have emerged. The doctor only needs to start the motor to enable the motor output shaft to rotate along a specific direction, and the transmission component can be driven to move towards the far end through the motor. After the operation is completed, the output shaft of the motor can rotate in the opposite direction, so that the transmission part moves towards the near end to reset the whole instrument. However, when the motor and associated mechanical and electrical components fail, the motorized retraction function may fail to reposition the instrument to open the jaws of the end effector, thereby preventing the procedure from proceeding smoothly.

Disclosure of Invention

In view of the problems in the prior art, an object of the present application is to provide a resetting device and a surgical instrument, in which a transmission mechanism can be separated from an electric mechanism by a first operating mechanism so that a transmission member is no longer influenced by the electric mechanism, and the transmission member can be driven to move by a second operating mechanism so as to be reset.

Embodiments of the present application provide a reduction device for a surgical instrument, the reduction device including:

a transmission member that is driven to move in an axial direction of the transmission member;

the electric mechanism is configured to provide power for the transmission component to move axially;

a transmission mechanism which connects the electric mechanism and the transmission member to transmit the power of the electric mechanism to the transmission member in a first state, and which is separated from the electric mechanism in a second state;

a first operating mechanism configured to be operable to drive the transport mechanism from the first state into the second state;

a second operating mechanism configured to be operable to drive the transmission member to move in the axial direction of the transmission member when the transmission mechanism is in the second state.

In some embodiments, the first operating mechanism abuts a first surface of the transfer mechanism and is operable to drive the transfer mechanism at least partially in a first direction when the first operating mechanism is moved at least partially in the first direction to move the transfer mechanism from the first state to the second state.

In some embodiments, the transmission mechanism comprises a first gear engaged with the electric mechanism and the transmission member, respectively, when the transmission mechanism is in the first state; when the transmission mechanism is in the second state, the second operating mechanism can be operated to drive the first gear to rotate, so that the first gear drives the transmission component to move along the axial direction of the transmission component.

In some embodiments, the transmission mechanism further includes a first gear shaft disposed inside the first gear, the second operating mechanism is provided with a first matching portion, the first gear shaft is provided with a second matching portion, and the first matching portion and the second matching portion form a non-relatively-rotatable connection.

In some embodiments, one of the first matching part and the second matching part is a matching concave part, the other one is a matching convex part, and the inner surface of the matching concave part and the outer surface of the matching convex part are respectively provided with a matched rotation stopping structure.

In some embodiments, the first gear shaft is further provided with a limiting part, and when the first matching part is connected with the second matching part, the first matching part at least partially abuts against the limiting part.

In some embodiments, the second operating mechanism includes a first operating lever and a second operating lever, a first end of the first operating lever is provided with the first mating portion, and a second end of the first operating lever is rotatably connected to the second operating lever by a first pivot.

In some embodiments, a cavity is formed inside the first operating rod, a sliding slot is formed on one side of the second operating rod, and the first pivot at least partially enters the sliding slot and can move along the extending direction of the sliding slot, so that the second operating rod at least partially enters the cavity of the first operating rod.

In some embodiments, the first direction is an axial direction along the first gear shaft, and the first direction is perpendicular to an axial direction of the transmission member;

the electric mechanism comprises a motor and a second gear, an output shaft of the motor can drive the second gear to rotate, the output shaft of the motor is parallel to the first direction, and the second gear is at least partially positioned on one side of the first gear along the second direction;

wherein the second direction is opposite to the first direction.

In some embodiments, the first operating mechanism includes a first switch lever and a second switch lever, the first switch lever is connected to the second switch lever by a second pivot, and the second switch lever drives the first switch lever to move at least partially in the first direction when rotating in a third direction about the second pivot.

In some embodiments, the width of the first switch lever is less than the width of the second switch lever.

In some embodiments, the transmission mechanism further includes a switching fitting provided on a side of the end face of the first gear, and a side surface of the switching fitting facing away from the first gear is the first surface.

The embodiment of the application also provides a surgical instrument comprising the reduction device.

In some embodiments, further comprising a housing, the transmission member and the transmission mechanism being at least partially located in the housing;

the shell comprises an accommodating cavity, one end of the accommodating cavity is opened on one side surface of the shell, and the second operating mechanism can be at least partially placed in the accommodating cavity.

The application also provides a surgical instrument comprising the reduction device.

The reduction device and surgical operation apparatus that this application provided have following advantage:

by adopting the transmission component resetting method and device, when the transmission component needs to be manually reset, the transmission mechanism can be separated from the electric mechanism through the first operating mechanism, the transmission component can be driven to move through the second operating mechanism to be backed and reset, and even if the backing function of the electric mechanism fails, the transmission component can be manually driven to reset. The reduction device may be applied to a surgical stapler or other type of surgical instrument.

Drawings

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

Fig. 1 is a schematic structural diagram of a resetting device according to an embodiment of the present application;

fig. 2 and 3 are schematic structural views of a resetting device with a housing removed according to an embodiment of the application;

FIG. 4 is a schematic view of the transmission mechanism, transmission member and first operating mechanism in cooperation with one embodiment of the present application;

FIG. 5 is a schematic view of the transmission mechanism, transmission member and first operating lever of an embodiment of the present application in cooperation;

FIG. 6 is a schematic view of the transmission mechanism, transmission member, first operating lever and second operating mechanism in cooperation with one embodiment of the present application;

FIG. 7 is a schematic structural view of a second lever mechanism of an embodiment of the present application;

FIG. 8 is a front view of the reset device with the housing removed and the transmission mechanism in a first state in accordance with an embodiment of the present application;

FIG. 9 is a front view of the reset device with the housing removed and the transmission mechanism in a second state in accordance with an embodiment of the present application;

FIG. 10 is a schematic view of the transmission mechanism, transmission member and second operating mechanism in cooperation with one embodiment of the present application;

FIG. 11 is a schematic structural view of a second operating mechanism of an embodiment of the present application;

FIG. 12 is an exploded view of a second operating mechanism of an embodiment of the present application;

FIG. 13 is a schematic view of an embodiment of the present application during storage of a secondary lever;

FIG. 14 is a schematic view of the second lever of an embodiment of the present application when stowed;

fig. 15 is a schematic view of the second operating mechanism of the embodiment of the present application being housed in a housing.

Reference numerals:

1. second pivot of housing 33

11. First opening 34 third pivot

13. Second opening 4 transmission mechanism

14. First gear of accommodation chamber 41

2. Second operating mechanism 42 first gear shaft

21. Second matching part of the first operation lever 421

211. First matching part 422 limiting part

212. Cavity 43 switching fitting

22. Second operating lever 44 elastic member

221. Chute 5 electric mechanism

23. First pivot 51 motor

3. First operating mechanism 52 second gear

31. First switching lever 6 drive member

32. Second switching lever 61 tooth face

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different 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 convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. In the specification, "or" may mean "and" or ". Although the terms "upper", "lower", "between", and the like may be used in this specification to describe various example features and elements of the application, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples set forth in the drawings. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this application. Although the terms first, second, third, etc. may be used herein to connote certain features, the terms first, second, third, etc. are used merely for descriptive purposes and not for limitation of the number and importance of particular features.

The present application provides a reduction device for a surgical instrument and a surgical instrument comprising the reduction device. The surgical instrument may be a surgical stapler or other type of instrument. Take a surgical stapler as an example. The surgical anastomat comprises an anastomat body and an anastomat head located at the far end of the anastomat body, wherein an electric mechanism, a transmission mechanism and a transmission component are arranged in the anastomat body, the anastomat head comprises a nail anvil and a nail bin which are oppositely arranged, and an anastomosis nail is arranged in the nail bin. When the anastomat is fired, the motor drives the transmission part to move towards the far-end side direction through the transmission mechanism so as to drive the nail head at the far end to finish executing actions of cutting and suturing. After the anastomat is fired, the electric mechanism can drive the transmission part to move towards the proximal end side through the transmission mechanism, and the anastomat is retracted to reset. When the reset function of the electric mechanism fails, the reset device can be operated to separate the transmission mechanism from the electric mechanism through the first operating mechanism, and the transmission component can be driven to move through the second operating mechanism to retreat and reset, so that the manual reset of the transmission component is realized.

The structure of the reduction device will be described in detail below with reference to the accompanying drawings, taking the surgical instrument as an example of a surgical stapler. It is to be understood that each of the figures and the following description are exemplary only and are not limiting upon the scope of the present application.

As shown in fig. 1 to 3, in one embodiment, the resetting device includes a housing 1, a transmission member 6, an electric mechanism 5, a transmission mechanism 4, a first operating mechanism 3 and a second operating mechanism 2. The transmission member 6 and the transmission mechanism 4 are at least partially disposed inside the housing 1. The transmission part 6 comprises a transmission shaft extending along the axial direction of the anastomat, and the transmission part 6 is provided with a tooth surface 61 corresponding to the position of the transmission mechanism 4. The transmission member 6 can be driven to move along the axial direction of the transmission member 6, specifically, when the anastomat is fired, the transmission member 6 is driven to move towards the far end side direction of the anastomat, and when the anastomat is reset, the transmission member 6 is driven to move towards the near end side direction of the anastomat. The electric mechanism 5 is configured to provide power for axial movement of the transmission member 6. In this embodiment, the electric mechanism 5 includes a motor 51 and a second gear 52, and the second gear 52 is driven by the motor 51 to rotate about an output shaft of the motor 51. The transmission mechanism 4 includes a first gear 41 and a first gear shaft 42, the first gear shaft 42 is disposed through the first gear 41, and the first gear 41 is rotatable with the first gear shaft 42 around an axis of the first gear shaft 42. The axial direction of the first gear shaft 42 is parallel to a first direction, and the first direction is perpendicular to the axial direction of the transmission member 6. The output shaft of the motor 51 is parallel to the first direction.

In the present application, the distal side and the proximal side are relative to the operator, the side closer to the operator is the proximal side, the side farther from the operator, i.e., the side closer to the surgical site, is the distal side, and the direction along the axial center of the stapler is the axial direction, i.e., the direction from the distal side to the proximal side of the stapler, or the direction from the proximal side to the distal side of the stapler. For example, in the perspective of fig. 1, the S1 direction is a direction from the distal end side to the proximal end side of the stapler, the S2 direction is a longitudinal direction, i.e., a height direction, hereinafter referred to as a first direction, the direction opposite to the S2 direction is hereinafter referred to as a second direction, and the S3 direction is a lateral direction, i.e., a width direction. In this application, for a component, the medial and lateral sides are relative to its center, with the side closer to the center being the medial side and the side further from the center being the lateral side.

In this embodiment, the transmission mechanism 4 includes a first state (shown in fig. 8) in which the first gear 41 simultaneously engages the tooth surface 61 of the transmission member 6 and the second gear 52 to transmit the power of the motor 51 to the transmission member 6, and a second state (shown in fig. 9). When the transmission mechanism 4 is in the second state, the first gear 41 is separated from the second gear 52, the first gear 41 remains engaged with the transmission member 6, the movement of the transmission member 6 does not interfere with the motor 51, but the rotation of the first gear 41 can still drive the axial movement of the transmission member 6. The structure of the transmission mechanism 4 and the electric mechanism 5 is only an example here, and in other alternative embodiments, the transmission mechanism 4 may comprise a plurality of first gears 41 and/or the electric mechanism 5 may comprise a plurality of second gears 52. When the transmission mechanism 4 enters the second state from the first state, the first gear 41 previously engaged with the second gear 52 is separated from the second gear 52. The output shaft of the motor 51 may be angled with respect to the first direction. The first direction may not be perpendicular to the axial direction of the stapler, but may be at an angle to the axial direction of the stapler, and, optionally, the angle may be acute.

The first operating means 3 is arranged to be operable to drive the transport means 4 from the first state into the second state. In this embodiment, the second gear 52 is at least partially located on one side of the first gear 41 in the second direction. When the first operating mechanism 3 is operated to drive the first gear 41 to move in the first direction in a state where the first gear 41 is engaged with the second gear 52, the first gear 41 is separated from the second gear 52.

As shown in fig. 3 to 7, the transmission mechanism 4 further includes a switching fitting 43 located on a lower end surface side of the first gear 41 and an elastic member 44 located on an upper end surface of the first gear 41, and a lower surface of the switching fitting 43 is a first surface of the transmission mechanism 4. The elastic member 44 gives the first gear 41 an elastic biasing force in the second direction. In this embodiment, the upper end of the first gear shaft 42 is provided with a limiting part 422, and the elastic member 44 is a compression spring disposed between the upper end surface of the first gear 41 and the limiting part 422. In other alternative embodiments, the elastic member 44 may be a tension spring provided on a lower end surface side of the first gear 41, an elastic sheet provided on an upper side or a lower side of the first gear 41, an elastic pad, or the like. When the transmission mechanism 4 is in the second state and the first operating mechanism 3 is no longer operated, the first gear 41 can move in the second direction by the elastic deformation restoring force of the elastic member 44, so that the transmission mechanism 4 returns to the first state. The first operating mechanism 3 includes a first switch lever 31 and a second switch lever 32, the first switch lever 31 is connected to the second switch lever 32 by a second pivot 33, the first switch lever 31 is driven to move at least partially in the first direction when the second switch lever 32 rotates around the second pivot 33 in the third direction, the first switch lever 31 drives the first gear 41 to move in the first direction by the switch fitting 43 and separates from the second gear 52, so that the transmission mechanism 4 enters the second state from the first state. In the perspective of fig. 3, the third direction is clockwise. As shown in fig. 7, the width of the first switch lever 31 is smaller than the width of the second switch lever 32, and the user can press the switch more conveniently by increasing the width of the second switch lever 32. At least one side of the first switching rod 31 is further provided with a third pivot 34, the inner side of the housing 1 may be correspondingly provided with a circular arc-shaped slide rail, and the third pivot 34 is at least partially embedded in the slide rail. When the second switch lever 32 is rotated in the third direction, the third pivot 34 moves in the slide rail, which guides the movement of the first switch lever 31.

The second operating mechanism 2 is configured to be operable to drive the transmission member 6 in an axial direction of the transmission member 6 when the transmission mechanism 4 is in the second state. Specifically, when the transmission mechanism 4 is in the second state, the movement of the transmission mechanism 4 is no longer driven and limited by the motor 51, the second operating mechanism 2 may be operated to drive the first gear 41 to rotate, so that the first gear 41 drives the transmission member 6 to move along the axial direction of the transmission member 6, and when the second operating mechanism 2 drives the first gear 41 to rotate along a specific direction, the first gear 41 drives the transmission member 6 to move towards the proximal side direction, so as to realize the retraction and resetting of the transmission member 6.

As shown in fig. 3 to 6, in this embodiment, the second operating mechanism 2 includes a first operating lever 21 and a second operating lever 22, a first end of the first operating lever 21 is provided with the first engaging portion 211, and a second end of the first operating lever 21 is rotatably connected to the second operating lever 22 by a first pivot 23. A second matching part 421 is arranged on one side of the limiting part 422 of the first gear shaft 42 opposite to the first operating rod 21. The first fitting portion 211 and the second fitting portion 421 may form a relatively non-rotatable connection. When the second operating rod 22 is operated to rotate the first operating rod 21, the first gear shaft 42 is driven to drive the first gear 41 to rotate by the cooperation of the first matching portion 211 and the second matching portion 421, and the first gear 41 drives the transmission member 6 to move along the axial direction of the stapler.

As shown in fig. 5 and 6, the first engaging portion 211 is an engaging concave portion, the second engaging portion 421 is an engaging convex portion, and the inner surface of the engaging concave portion and the outer surface of the engaging convex portion are respectively provided with a rotation stopping structure, for example, the cross-sections of the engaging concave portion and the engaging convex portion are both polygonal. After the first operating rod 21 and the first gear shaft 42 are combined, the first end surface of the first operating rod 21 abuts against the upper surface of the limiting portion 422. In another alternative embodiment, it is also within the scope of the present application that the first mating portion 211 is a mating convex portion, and the second mating portion 421 is a mating concave portion.

The operation of the resetting device will be described in detail with reference to fig. 8 to 10.

During the process of the stapler firing, the transmission mechanism 4 is in the first state, and the first gear 41 can transmit the power of the motor 51 to the transmission component 6. When the motor 51 is activated, the motor 51 drives the transmission member 6 via the first gear 41 from the initial position to the firing position in the distal direction. After the stapler has been fired, and the transmission member 6 has not been reset, the reset device is in the state shown in fig. 8. At this time, the transmission member 6 is in the firing position. The transmission mechanism 4 is still in the first state, and the first gear 41 is simultaneously engaged with the tooth face 61 of the transmission member 6 and the second gear 52. When the transmission member 6 needs to be reset, the second switching lever 32 is operated first to rotate the second switching lever 32 in the third direction, the second switching lever 32 drives the first switching lever 31 to move in the first direction, the first switching lever 31 drives the first gear 41 to move in a direction away from the second gear 52 through the switching matching part, the first gear 41 presses the elastic member 44 to be elastically deformed, the first gear 41 is separated from the second gear 52, that is, the transmission mechanism 4 is separated from the electric mechanism 5 to enter the second state. The first gear wheel 41 remains in engagement with the tooth flank 61 of the transmission member 6. At this time, the state of the return mechanism is as shown in fig. 9 and 10. Then, the second operating mechanism 2 is attached to the upper end of the first gear shaft 42, the first engagement portion 211 and the second engagement portion 421 are engaged with each other, the second operating lever 22 is operated to rotate in a specific direction (clockwise direction in fig. 10), the first operating lever 21 drives the first gear 41 to rotate in the specific direction via the first gear shaft 42, and the first gear 41 drives the transmission member 6 to move in the proximal direction and to retract and return.

In this embodiment, before the manual retraction return, the second operating lever 22 may be housed inside the first operating lever 21, and the second operating mechanism 2 may be housed entirely inside the housing 1. Specifically, as shown in fig. 11 and 12, a cavity 212 is disposed inside the first operating rod 21, a sliding slot 221 is disposed on one side of the second operating rod 22, and the first pivot 23 at least partially enters the sliding slot 221 and is movable along an extending direction of the sliding slot 221. When the second operating mechanism 2 is needed, the second operating lever 22 and the first operating lever 21 are adjusted to be in a substantially vertical state, which is convenient for the user to operate. As shown in fig. 13, when the storage is required, the second operating lever 22 is first adjusted to be substantially parallel to the first operating lever 21, then the second operating lever 22 is pushed toward the inside of the first operating lever 21, the first pivot 23 moves along the slide slot 221, and the second operating lever 22 enters at least partially into the cavity 212 of the first operating lever 21, so as to reach the state shown in fig. 14. As shown in fig. 15, the housing 1 includes a receiving cavity 14, a second opening 13 at one end of the receiving cavity 14 is provided on one side surface of the housing 1, and the second operating mechanism 2 can be at least partially placed in the receiving cavity 14 through the second opening 13. When the second operating rod 22 is needed to be used for resetting, the second operating rod 22 is taken out of the accommodating cavity 14, the second operating rod 22 is taken out of the first operating rod 21, the angle of the second operating rod 22 relative to the first operating rod 21 is adjusted to enable the second operating rod 22 to be basically vertical to the first operating rod 21, and one end, provided with the first matching portion 211, of the first operating rod 21 penetrates through the first opening 11 of the shell 1 to be matched with the first gear shaft 42 in the shell 1.

The foregoing is a more detailed description of the present application in connection with specific preferred embodiments and it is not intended that the present application be limited to these specific details. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.

Claims (10)

1. A reduction device for a surgical instrument, the reduction device comprising:

a transmission member (6) which can be driven to move along the axial direction of the transmission member (6);

the electric mechanism (5) is configured to provide power for the axial movement of the transmission component (6);

a transmission mechanism (4), wherein in a first state, the transmission mechanism (4) is connected with the electric mechanism (5) and the transmission component (6) so as to transmit the power of the electric mechanism (5) to the transmission component (6), and in a second state, the transmission mechanism (4) is separated from the electric mechanism (5);

-first operating means (3) arranged to be operable to drive said transport means (4) from said first state into said second state;

a second operating mechanism (2) configured to be operable to drive the transmission member (6) to move in an axial direction of the transmission member (6) when the transmission mechanism (4) is in the second state.

2. The reset device of claim 1, wherein:

the first operating mechanism (3) abuts against a first surface of the transmission mechanism (4) and is operable to drive the transmission mechanism (4) to move at least partially in a first direction when the first operating mechanism is moved at least partially in the first direction, so that the transmission mechanism (4) enters the second state from the first state.

3. Resetting device according to claim 2, characterized in that the transmission means (4) comprise a first gear wheel (41), which first gear wheel (41) meshes with the electric mechanism (5) and the transmission member (6), respectively, when the transmission means (4) are in the first state; when the transmission mechanism (4) is in the second state, the second operating mechanism (2) can be operated to drive the first gear (41) to rotate, so that the first gear (41) drives the transmission component (6) to move along the axial direction of the transmission component (6).

4. The resetting device according to claim 3, characterized in that the transmission mechanism (4) further comprises a first gear shaft (42) arranged inside the first gear (41), the second operating mechanism (2) is provided with a first matching portion (211), the first gear shaft (42) is provided with a second matching portion (421), and the first matching portion (211) and the second matching portion (421) form a non-rotatable connection.

5. The resetting device according to claim 4, characterized in that the first gear shaft (42) is further provided with a limiting portion (422), and when the first matching portion (211) is connected with the second matching portion (421), at least part of the first matching portion (211) is abutted against the limiting portion (422).

6. The resetting device according to claim 4, characterized in that the second operating mechanism (2) comprises a first operating lever (21) and a second operating lever (22), a first end of the first operating lever (21) being provided with the first fitting portion (211), a second end of the first operating lever (21) being rotatably connected to the second operating lever (22) by a first pivot (23);

a cavity (212) is arranged inside the first operating rod (21), a sliding groove (221) is arranged on one side of the second operating rod (22), and the first pivot (23) at least partially enters the sliding groove (221) and can move along the extending direction of the sliding groove (221) so that the second operating rod (22) at least partially enters the cavity (212) of the first operating rod (21).

7. The resetting device according to claim 4, characterized in that the first direction is an axial direction along the first gear shaft (42) and the first direction is perpendicular to an axial direction of the transmission member (6);

the electric mechanism (5) comprises a motor (51) and a second gear (52), an output shaft of the motor (51) can drive the second gear (52) to rotate, an output shaft of the motor (51) is parallel to the first direction, and the second gear (52) is at least partially positioned on one side of the first gear (41) along the second direction;

wherein the second direction is opposite to the first direction.

8. A resetting device according to claim 3, characterized in that the first operating mechanism (3) comprises a first switch lever (31) and a second switch lever (32), the first switch lever (31) being connected to the second switch lever (32) by a second pivot (33), the second switch lever (32) driving the first switch lever (31) at least partly in the first direction when rotating in a third direction about the second pivot (33);

the width of the first switching lever (31) is smaller than the width of the second switching lever (32).

9. A surgical instrument comprising a reduction device according to any one of claims 1 to 8.

10. A surgical instrument according to claim 9, further comprising a housing in which the transmission member (6) and the transmission mechanism (4) are located at least partially;

the shell comprises a containing cavity, one end of the containing cavity is opened on one side surface of the shell, and the second operating mechanism (2) can be at least partially placed in the containing cavity.

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