CN116407187A

CN116407187A - Jaw assembly drive for a surgical instrument and surgical instrument

Info

Publication number: CN116407187A
Application number: CN202111645475.2A
Authority: CN
Inventors: 李正治; 孙宝峰; 戚亚龙
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2023-07-11
Also published as: WO2023125115A1

Abstract

The invention discloses a jaw assembly driving device for a surgical instrument and the surgical instrument, wherein the jaw assembly driving device for the surgical instrument is used for controlling locking, unlocking and rotation of a jaw assembly and comprises the following components: a base; the distal end of the steering piece is connected with the jaw assembly, and the proximal end of the steering piece is pivotally connected with the seat body; the moving piece is movably connected with the steering piece and is provided with a locking position and an unlocking position; a driving member that drives the moving member from the locked position toward the distal end to the unlocked position; when the steering device is in the locking position, the moving piece is matched with the seat body to lock the steering piece; in the unlocking position, the moving part is separated from the base body to unlock the steering part, and the driving part moves distally to drive the steering part to rotate through the moving part. The technical scheme of the application effectively solves the problems of complex structure and low reliability of the jaw assembly driving device in the prior art.

Description

Jaw assembly drive for a surgical instrument and surgical instrument

Technical Field

The invention relates to the technical field of medical instruments, in particular to a jaw assembly driving device for a surgical instrument and the surgical instrument.

Background

Surgical cutting staplers are a commonly used instrument in medicine to replace manual suturing, and the main working principle is to use a cutting knife to separate tissues and use titanium nails to anastomose the tissues, similar to a stapler. A variety of staplers are classified according to the suitability for different body parts, and for surgical incision staplers, the working principle is to enter the patient's body through the cannula of the puncture outfit positioned precisely at the surgical site, then make a longitudinal incision in the tissue and apply staples on opposite sides of the incision, thereby performing dissection and anastomosis of the tissue.

The existing surgical cutting anastomat comprises a jaw assembly and a jaw assembly driving device, wherein the jaw assembly driving device can drive the jaw assembly to rotate, so that the jaw assembly can be flexibly turned to different positions when a patient is subjected to operation, but at the same time, the existing jaw assembly driving device is complex in structure, low in reliability and poor in locking and turning effects of the jaw assembly, and therefore, the existing jaw assembly driving device is necessary to be improved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a jaw assembly driving device for a surgical instrument and the surgical instrument, and solves the problems of complex structure and low reliability of the jaw assembly driving device in the prior art.

The invention is realized by the following technical scheme: a jaw assembly drive for a surgical instrument for controlling locking, unlocking and rotation of a jaw assembly, the jaw assembly drive comprising: the seat body is connected with the body of the surgical instrument; the distal end of the steering piece is connected with the jaw assembly, so that the steering piece and the jaw assembly are synchronously locked, unlocked and rotated, and the proximal end of the steering piece is pivotally connected with the seat body; the moving piece is movably connected with the steering piece and is provided with a locking position and an unlocking position; a driving member that drives the moving member to move distally from the locked position to the unlocked position; when the steering device is in the locking position, the moving piece is matched with the seat body to lock the steering piece; in the unlocking position, the moving part is separated from the base body to unlock the steering part, and the driving part moves distally to drive the steering part to rotate through the moving part.

The invention is realized by the following technical scheme: a jaw assembly drive for a surgical instrument for controlling locking, unlocking and rotation of a jaw assembly, the jaw assembly drive comprising a housing, a steering assembly, a drive member and a biasing member; the seat body is connected with the body of the surgical instrument; the distal end of the steering assembly is connected with the jaw assembly so that the steering assembly and the jaw assembly are synchronously locked, unlocked and rotated, and the proximal end of the steering assembly is pivotally connected with the seat body; the steering assembly has a locked state and an unlocked state, the steering assembly is driven by the driving member to transition from the locked state to the unlocked state, and the biasing member biases the steering assembly to transition from the unlocked state to the locked state; in the locked state, the biasing member biases the steering assembly proximally to lock the steering assembly with the housing; in the unlocking state, the steering assembly drives the jaw assembly to rotate under the action of the driving piece, and the biasing piece is compressed and stored energy.

Further, the steering assembly comprises a steering member and a moving member, wherein the moving member is movably connected with the steering member, the distal end of the steering member is connected with the jaw assembly, so that the steering member and the jaw assembly are synchronously locked, unlocked and rotated, and the proximal end of the steering member is pivotally connected with the seat; the moving piece is provided with a locking position and an unlocking position; the driving piece drives the moving piece to move distally from the locking position to the unlocking position, so that the steering assembly is converted into the unlocking state from the locking state; the biasing member biases the moving member to move proximally from the unlocked position to the locked position, thereby causing the steering assembly to transition from the unlocked state to the locked state; when in the locking position, the biasing member biases the moving member to enable the moving member to be matched with the seat body so as to lock the steering member; when the steering device is in the unlocking position, the moving piece is separated from the base body to unlock the steering piece, and the moving piece drives the steering piece to rotate under the action of the driving piece.

Further, the jaw assembly drive further includes a biasing member that biases the moving member proximally to maintain the moving member in the locked position when the moving member is driven from the locked position to the unlocked position, the biasing member being compressively stored energy.

Further, the distal end of the biasing member is coupled to the steering member and the proximal end of the biasing member is coupled to the moving member.

Further, the biasing member is an elastic member.

Further, the moving member is movably connected with the steering member, and the driving member moves distally to drive the moving member to move distally from the locked position to the unlocked position, and the biasing member biases the moving member to move proximally from the unlocked position to the locked position.

Further, the moving member is slidably coupled to the steering member, and in the locked position, the distal end of the moving member is spaced from the proximal end of the steering member; in the unlocked position, the distal end of the moving member abuts the proximal end of the steering member.

Further, the jaw assembly drive further includes a movement guide, guided by the movement guide, to move between the locked and unlocked positions.

Further, the movement guide member includes a slide rail structure, and the movement member moves along an extending direction of the slide rail structure.

Further, the sliding rail structure comprises a sliding block and a sliding groove, the sliding block is in sliding fit with the sliding groove, one of the sliding block and the sliding groove is arranged on the steering piece, and the other of the sliding block and the sliding groove is arranged on the moving piece.

Further, the sliding block is arranged on the steering piece, the sliding groove is arranged on the moving piece, the sliding block comprises a sliding block main body and a convex edge arranged on the sliding block main body, and the sliding groove comprises a sliding groove main body section in sliding fit with the sliding block main body and a first limiting stage in sliding fit with the convex edge.

Further, the moving member is pivotally connected to the steering member, and the driving member drives the moving member to move pivotally from the locked position to the unlocked position distally, and the biasing member biases the moving member to move pivotally from the unlocked position to the locked position proximally.

Further, a pivot structure is provided between the moving member and the steering member.

Further, the pivot structure includes a pivot hole and a pivot post, the pivot post is inserted into the pivot hole, one of the pivot post and the pivot hole is provided on the steering member, and the other of the pivot post and the pivot hole is provided on the moving member.

Further, the jaw assembly drive for a surgical instrument further includes a nesting structure disposed between the steering member and the moving member, and a pivoting structure disposed between the nesting structure.

Further, the steering member comprises a projection, the moving member comprises a groove, the projection is inserted into the groove, and the projection and the groove form a nested structure.

Further, the thickness of the middle portion of the mover is greater than the thickness of the distal end of the mover and the proximal end of the mover.

Further, the seat body comprises a first body, and the first body is provided with a first locking piece; the moving part comprises a second body, and the second body is provided with a second locking part; when the movable part is in the locking position, the first locking part and the second locking part are matched to realize the locking of the movable part and the seat body; in the locked position, the first locking member and the second locking member are separated to separate the moving member from the base.

Further, one of the first locking member and the second locking member includes a tooth, and the other of the first locking member and the second locking member includes a tooth slot.

Further, the driving piece comprises a steering knob and a transmission mechanism; the transmission mechanism is connected with the moving piece, and the steering knob rotates to drive the transmission mechanism to move, so that the moving piece is driven to move.

Further, the transmission mechanism comprises a driving part and a driven part connected with the moving part, the driven part is driven by the driving part, and the driving part is driven by the steering knob.

Further, the driven piece comprises a first driving rod and a second driving rod, the moving piece is connected with the first driving rod and the second driving rod respectively, and the driving piece drives the first driving rod and the second driving rod to move back and forth.

Further, the moving member comprises a first abutting surface and a second abutting surface, the first driving rod is in abutting fit with the first abutting surface when advancing, and the second driving rod is in abutting fit with the second abutting surface when advancing.

Further, the driving piece comprises a first driving rod and a second driving rod, the first driving rod is connected with the first driving rod, and the second driving rod is connected with the second driving rod.

According to another aspect of the present application, there is provided a surgical instrument comprising a shaft assembly, a handle assembly disposed at a proximal end of the shaft assembly, a jaw assembly disposed at a distal end of the shaft assembly, and a body disposed within the shaft assembly: the surgical instrument further comprises the jaw assembly driving device, wherein the jaw assembly driving device is used for controlling locking, unlocking and rotation of the jaw assembly.

Compared with the prior art, the invention has the beneficial effects that: the moving piece is matched with and separated from the seat body, so that the steering piece is locked and unlocked, further the jaw assembly is locked and unlocked, and compared with the prior art, the jaw assembly is locked and unlocked by arranging a complex locking structure at the knob end far away from the jaw assembly, and the jaw assembly can be effectively locked; in addition, the jaw assembly driving device has fewer parts, the whole structure is simple and compact, and the reliability of locking, unlocking and steering of the jaw assembly is high.

Drawings

FIG. 1 is a schematic perspective view of a jaw assembly drive apparatus according to a first embodiment of the invention;

FIG. 2 is a schematic perspective view of another view of the jaw assembly drive apparatus shown in FIG. 1;

FIG. 3 is an exploded view of a portion of the structure shown in FIG. 1;

FIG. 4 is an enlarged view of a portion of the view shown in FIG. 3;

FIG. 5 is a schematic perspective view of the structure shown in FIG. 3;

FIG. 6 is an enlarged view of a portion of the view shown in FIG. 5;

FIG. 7 is a schematic view of the structure of the locked position shown in FIG. 1;

FIG. 8 is an enlarged view of a portion of the view shown in FIG. 7;

FIG. 9 is a schematic view of the structure of the mover shown in FIG. 7 as it moves;

FIG. 10 is an enlarged view of a portion of the view shown in FIG. 9;

FIG. 11 is a schematic view of the moving member of FIG. 7 rotating the steering member;

FIG. 12 is an enlarged view of a portion of the view shown in FIG. 11;

FIG. 13 is a schematic view of the mechanism of FIG. 7, again locked after rotation of the mover is completed;

FIG. 14 is an enlarged view of a portion of the view shown in FIG. 13;

FIG. 15 is a schematic perspective view of the steering member of FIG. 1;

FIG. 16 is a schematic perspective view of the alternative view of FIG. 15;

FIG. 17 is a schematic perspective view of the mover shown in FIG. 1;

FIG. 18 is a schematic perspective view of the base shown in FIG. 1;

FIG. 19 is a schematic perspective view of the alternative view of FIG. 18;

FIG. 20 is a schematic perspective view of the torsion spring of FIG. 1;

FIG. 21 is a schematic perspective view of the follower of FIG. 1;

FIG. 22 is a schematic perspective view of the steering knob shown in FIG. 1;

FIG. 23 is a schematic perspective view of the alternative view of FIG. 22;

FIG. 24 is a schematic perspective view of the driving member shown in FIG. 1;

FIG. 25 is a partially exploded perspective view of a jaw assembly drive apparatus providing a second embodiment of the present invention;

FIG. 26 is a schematic view of the structure in the locked position shown in FIG. 25;

FIG. 27 is a side view schematic of FIG. 26;

FIG. 28 is a schematic partial cross-sectional view of FIG. 27;

FIG. 29 is a schematic view of the second tooth illustrated in FIG. 25 disengaged from the second tooth slot;

FIG. 30 is an enlarged partial view of FIG. 29;

FIG. 31 is a side view schematic of FIG. 29;

FIG. 32 is a schematic partial cross-sectional view of FIG. 31;

FIG. 33 is a schematic view of the structure of the rotation of the mover shown in FIG. 25;

FIG. 34 is a side view schematic of FIG. 33;

FIG. 35 is a schematic partial cross-sectional view of FIG. 34;

FIG. 36 is a schematic view of the structure of the figure 25 kinematic element in a locked position after rotation;

FIG. 37 is an enlarged view of a portion of FIG. 36;

FIG. 38 is a side schematic view of FIG. 36;

FIG. 39 is a schematic partial cross-sectional view of FIG. 38;

FIG. 40 is a schematic perspective view of the steering member of FIG. 25;

FIG. 41 is a schematic perspective view of the other view of FIG. 40;

FIG. 42 is a schematic perspective view of the mover shown in FIG. 25;

FIG. 43 is a schematic perspective view of the alternative view of FIG. 42;

FIG. 44 is a schematic perspective view of the housing shown in FIG. 25;

fig. 45 is a schematic perspective view of the jaw assembly of fig. 2.

10. A base; 11. a first extension; 12. a first body; 121. a first locking member; 20. a steering member; 21. a bump; 30. a moving member; 31. a first mounting portion; 32. a second mounting portion; 34. a second body; 341. a second locking member; 35. a first abutment surface; 36. a second abutment surface; 37. a groove; 40. a driving member; 41. a steering knob; 42. a transmission mechanism; 421. a driving member; 4211. a first active lever; 4212. a second active lever; 422. a follower; 4221. a first driving lever; 4222. a second driving lever; 50. a first biasing member; 51. a torsion spring; 511. a spiral part; 512. a first torsion spring arm; 513. a second torsion spring arm; 60. a motion guide; 61. a slide rail structure; 611. a slide block; 6111. a slider body; 6112. a convex edge; 6113. a boss; 612. a chute; 6121. a chute body section; 6122. a first limit stage; 6123. a second limit stage; 70. a pivoting structure; 71. a pivot hole; 72. a pivot post; 721. an arc section; 722. a planar section; 723. a connection section; 80. a nested structure; 90. a second biasing member; 101. a staple cartridge holder; 102. a nail supporting seat; 24. a pin hole; 1012. a notch; 1021. a cylindrical shaft; 1011. a special-shaped groove; 1013. a circular connection port; 103. a spring pin; 100. briquetting; 104. bending sections; 200. a jaw assembly; 300. a shaft assembly; 400. a handle assembly.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is to be understood that the terms "proximal" and "distal" are used herein with respect to a clinician manipulating a handle of a stapler. The term "proximal" refers to the portion proximal to the clinician, and the term "distal" refers to the portion distal to the clinician. I.e., the handles are proximal and the jaw assembly is distal, e.g., the proximal end of a component represents an end relatively close to the handles and the distal end represents an end relatively close to the jaw assembly. The terms "upper" and "lower" refer to the relative positions of the staple abutment and the cartridge abutment of the jaw assembly, specifically the staple abutment being "upper" and the cartridge abutment being "lower". However, the stapler can be used in many orientations and positions, and thus these terms expressing relative positional relationships are not limiting and absolute.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, movably connected, or integrated, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two elements or interaction relationship between the two elements such as abutting. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. It should be noted that, when the terms "connected" and "connected" are used in the meanings defined by the corresponding terms, only the cases where the terms are clearly required are excluded, and other possible cases are not excluded, such as "detachably connected" means detachably connected, not including being integrated, but movable connection and the like are not excluded.

Fig. 1-24 illustrate a jaw assembly drive for a surgical instrument for controlling locking, unlocking and rotation of a jaw assembly in accordance with a first embodiment of the present invention. The jaw assembly driving device includes: the steering device comprises a base body 10, a steering member 20, a moving member 30 and a driving member 40. The distal end of the steering member 20 is connected to the jaw assembly 200 such that the steering member 20 is locked, unlocked and rotated in synchronization with the jaw assembly 200, and the proximal end of the steering member 20 is pivotally connected to the housing 10. The moving member 30 is movably coupled to the steering member 20, and the moving member 30 has a locked position and an unlocked position. The driving member 40 drives the moving member 30 distally from the locked position to the unlocked position; in the locked position, the moving member 30 cooperates with the housing 10 to lock the steering member 20; in the unlocked position, the moving member 30 is separated from the housing 10 to unlock the steering member 20, and the driving member 40 moves distally to drive the steering member 20 to rotate by the moving member 30.

As can be seen from the above, the moving member of the present embodiment is movably connected to the steering member, and the moving member can move from the locking position to the unlocking position under the action of the driving member, and when in the locking position, the moving member cooperates with the seat to lock the steering member; when the steering member is in the unlocking position, the moving member is separated from the base to unlock the steering member, and the steering member is driven to rotate under the action of the driving member. That is, the jaw assembly driving device for a surgical instrument of the embodiment is matched with and separated from the seat body through the moving part, so that locking and unlocking of the steering part are realized, further locking and unlocking of the jaw assembly are realized, and compared with the prior art, the jaw assembly can be effectively locked by arranging a complex locking structure at the knob end far away from the jaw assembly; in addition, the jaw assembly driving device has fewer parts, the whole structure is simple and compact, and the reliability of locking and steering of the jaw assembly is high.

In this embodiment, the movement member 30 is slidably coupled to the steering member 20, and in the locked position, the distal end of the movement member 30 is disposed in spaced relation to the proximal end of the steering member 20; in the unlocked position, the distal end of the movement member 30 abuts the proximal end of the steering member 20. The sliding fit of the moving member 30 and the steering member 20 enables the steering member 20 to be locked and thus the jaw assembly to be locked by the fit of the moving member 30 and the seat 10 when the moving member 30 is in the locking position; meanwhile, in the locked position, the distal end of the moving member 30 is spaced apart from the proximal end of the steering member 20, providing a moving space for the moving member 30, so that the moving member 30 can be moved distally from the locked position to the unlocked position by the driving member 40. In the unlocking position, the distal end of the moving member 30 abuts against the proximal end of the steering member 20, so that on one hand, the moving member 30 drives the steering member 20 to rotate more stably under the action of the driving member 40, and the jaw assembly rotates more stably; on the other hand, after the distal end of the moving member 30 abuts against the proximal end of the steering member 20, the translational movement of the moving member 30 is limited, and the moving member and the steering member 20 rotate together under the action of the driving member 40, so that the energy loss is reduced, and the operation is more labor-saving and smoother.

In this embodiment, the movement member 30 is movably coupled to the steering member 20, and the driving member 40 drives the movement member 30 distally from the locked position to the unlocked position. Specifically, the jaw assembly drive further includes a movement guide 60, and the movement member 30 is guided by the movement guide 60 for movement between the locked and unlocked positions. The above-described movement guide 60 can secure the moving direction of the mover 30. More specifically, the movement guide 60 includes a slide rail structure 61, and the driving member 40 drives the movement member 30 to move distally from the locked position to the unlocked position along the extending direction of the slide rail structure 61. By means of the design, on one hand, the moving part 30 is movably connected with the steering part 20, the moving part 30 limits the steering part 20 through the sliding rail structure 61, so that when the moving part 30 is in a locking position, the steering part 20 is locked through cooperation with the seat body 10, and further, the jaw assembly is locked; on the other hand, the device can play a role in guiding the movement of the moving part 30, and the contact area of the moving part 30 and the steering part 20 is increased, so that the movement of the moving part 30 and the rotation of the moving part 30 and the steering part 20 are stable, meanwhile, the structure is simplified, and the reliability is improved.

The sliding rail structure 61 includes a sliding block 611 and a sliding groove 612, the sliding block 611 and the sliding groove 612 are in sliding fit, one of the sliding block 611 and the sliding groove 612 is disposed on the turning member 20, and the other of the sliding block 611 and the sliding groove 612 is disposed on the moving member 30. Specifically, in the present embodiment, the slider 611 is provided on the steering member 20, and the slide groove 612 is provided on the moving member 30. The sliding block 611 comprises a sliding block main body 6111 and a convex edge 6112 arranged on the sliding block main body 6111, and the sliding groove 612 comprises a sliding groove main body section 6121 in sliding fit with the sliding block main body 6111 and a first limit step section 6122 matched with the convex edge 6112. The cooperation of the first limiting step 6122 and the convex edge 6112 can ensure the stability of sliding fit of the sliding block 611 and the sliding groove 612. The slider 611 further includes a boss 6113 provided at an end of the slider body 6111, the boss 6113 extending toward the mover 30, and the slide groove 612 further includes a second limit step 6123 that is engaged with the boss 6113. The same second limiting stage 6123 is in abutting fit with the protruding portion 6113, so that the stability of the steering member 20 can be further improved, and the limiting effect of the sliding rail structure 61 is also guaranteed. Meanwhile, the end part of the protruding part 6113 far away from the steering part 20 is provided with an arc transition, so that the locking condition can be prevented, and the sliding fit of the sliding block 611 and the sliding groove 612 is smoother. Further, a slider 611 is provided at the proximal end of the steering member 20; the distal end of the housing 10 is provided with the first extension 11, and the mover 30 is overlapped with the first extension 11, and such arrangement can improve space utilization, making the overall structure more compact.

The jaw assembly drive further includes a biasing member that biases the moving member 30 proximally to maintain the moving member 30 in the locked position when the moving member 30 is driven from the locked position to the unlocked position, the biasing member being compressively stored energy. The biasing member is an elastic member. In this embodiment, the biasing member is a first biasing member 50. That is, in the locked position, the first biasing member 50 biases the moving member 30 proximally to maintain the moving member 30 in the locked position, the first biasing member 50 being compressively charged as the moving member 30 is driven from the locked position to the unlocked position. When the driving member 40 drives the moving member 30 to move, the force applied to the moving member 30 by the first biasing member 50 needs to be overcome, so that the jaw assembly driving device is more damped when being controlled, namely, the operation feel of a doctor is improved; when no external force is applied to the moving member 30, the moving member 30 can be moved proximally from the unlocking position to the locking position by the first biasing member 50. Specifically, the distal end of the first biasing member 50 is coupled to the steering member 20 and the proximal end of the first biasing member 50 is coupled to the moving member 30. More specifically, in the present embodiment, the first biasing member 50 is provided between the moving member 30 and the steering member 20, and this design allows for high space utilization, compact construction, and easy installation. Preferably, the moving member 30 is provided with a first mounting portion 31 and a second mounting portion 32, the steering member 20 is provided with a third mounting portion, the first biasing member 50 is a torsion spring 51, the torsion spring 51 includes a spiral portion 511 and first and second

torsion spring arms

512 and 513 connected at both sides of the spiral portion 511, the spiral portion 511 is provided at the third mounting portion, the first torsion spring arm 512 is engaged with the first mounting portion 31, and the second torsion spring arm 513 is engaged with the second mounting portion 32. The torsion spring 51 has a simple structure, low cost, and good resetting effect, and the first torsion spring arm 512 and the second torsion spring arm 513 can be stably matched with the first mounting portion 31 and the second mounting portion 32, so that stability is improved. In an embodiment not shown in the figures, the biasing member comprises other forms of resilient members, such as rubber members or springs, which are compressively deformable and have the ability to return, the rubber members or springs being arranged between the moving member and the steering member.

Referring to fig. 1 to 20, when the moving member 30 rotates, the first torsion spring arm 512 and the second torsion spring arm 513 are bent. At this time, the engagement of the first torsion spring arm 512 with the first mounting portion 31 may become point-contact, and the engagement of the second torsion spring arm 513 with the second mounting portion 32 may also become point-contact, which is unstable and may easily cause damage to the first torsion spring arm 512 or the second torsion spring arm 513. In order to avoid the above, in the present embodiment, the first mounting portion 31 includes a first contact surface, the second mounting portion 32 includes a second contact surface, and the first contact surface and the second contact surface are each disposed obliquely, preferably, an angle between the first contact surface and the second contact surface is between 5 ° and 30 °, and a distance between the first contact surface and the second contact surface is gradually reduced in a direction from the steering member 20 to the base 10. The above arrangement can realize line contact with the first contact surface when the first torsion spring arm 512 bends, and can realize line contact with the second contact surface when the second torsion spring arm 513 bends, i.e. the contact area is larger, so that the rotating process of the moving member 30 is more stable. In an embodiment not shown in the drawings, a first limiting groove is formed in the first contact surface, a second limiting groove is formed in the second contact surface, the first torsion spring arm is clamped in the first limiting groove, and the second torsion spring arm is clamped in the second limiting groove, so that the jaw assembly rotating process is stable.

The seat body 10 includes a first body 12, the first body 12 being provided with a first locking member 121; the moving member 30 includes a second body 34, the second body 34 is provided with a second locking member 341, and the first locking member 121 and the second locking member 341 cooperate to achieve locking of the moving member 30 with the housing 10. The first locking member 121 and the second locking member 341 can effectively achieve locking of the housing 10 and the moving member 30. As can be seen from the above description, the moving process of the moving member includes moving and rotating, and during the rotating, in order to avoid the moving member interfering with other structures, in this embodiment, an arc concave portion is disposed on a side of the first body 12 facing the second body 34, and an arc convex portion is disposed on a side of the second body 34 facing the first body 12. The arc-shaped concave portion is provided with a first locking piece 121, and the arc-shaped convex portion is provided with a second locking piece 341. The arc concave part and the arc convex part can be better matched for rotation, and the arc convex part and other structures can be prevented from being interfered or blocked. The first locking member 121 and the second locking member 341 can lock the position between the moving member 30 and the housing 10, ensuring that the jaw assembly is stably fixed at an angle after being rotated at the angle. One of the first locking member 121 and the second locking member 341 includes a first tooth, and the other of the first locking member 121 and the second locking member 341 includes a first tooth groove. Specifically, in this embodiment, the first tooth is disposed on the second body, the first tooth slot is disposed on the first body, and the first tooth slot are in plug-in fit to realize locking of the angle of the moving member 30. The end of the first tooth is provided with a conical surface, and for matching with the first tooth, the first tooth groove is also provided with a flaring surface, and in the embodiment, the number of the first tooth grooves is one, and the number of the first tooth grooves is multiple.

The drive member 40 of the jaw assembly drive comprises a steering knob 41 and a transmission 42; the transmission mechanism 42 is connected with the moving member 30, and the steering knob 41 is rotated to drive the transmission mechanism 42 to move, thereby driving the moving member 30 to move. Such a setting structure is comparatively simple, and the operation of being convenient for simultaneously. Specifically, the transmission mechanism 42 includes a driving member 421, a driven member 422 connected to the moving member 30, the driven member 422 is driven by the driving member 421, and the driving member 421 is driven by the steering knob 41. More specifically, the follower 422 includes a first driving lever 4221 and a second driving lever 4222, and the moving member 30 is connected to the first driving lever 4221 and the second driving lever 4222, respectively, and the driving member 421 drives the first driving lever 4221 and the second driving lever 4222 to move in tandem. The first and

second drive rods

4221, 4222 described above in tandem are effective to drive the movement member 30 distally from the locked position to the unlocked position. In an embodiment not shown in the drawings, the follower may also be a driving rope, such as a wire rope, etc., without limitation. The driving member 421 includes a first driving lever 4211 and a second driving lever 4212, the first driving lever 4211 is connected to the first driving lever 4221, and the second driving lever 4212 is connected to the second driving lever 4222. The driving member 40 further includes a press block 100 fixedly disposed in the body of the surgical instrument, and the first driving rod 4211 and the second driving rod 4212 each include a first positioning end and a second positioning end, wherein the second positioning end is a bending section 104, and the bending section 104 is inserted into the press block 100 and hinged thereto. Meanwhile, a mounting groove is provided at the bottom of the steering knob 41, into which the first positioning ends of the first and

second driving levers

4211 and 4212 are inserted at intervals. Due to the presence of the pressing block 100, the first positioning ends of the first driving rod 4211 and the second driving rod 4212 swing in the front-rear direction relative to the respective second positioning ends under the action of the steering knob 41, so as to drive the first driving rod 4221 and the second driving rod 4222 to move in front-rear direction. The mover 30 includes a first abutment surface 35 and a second abutment surface 36, and the first driving lever 4221 is in abutment engagement with the first abutment surface 35 when advanced, and the second driving lever 4222 is in abutment engagement with the second abutment surface 36 when advanced. The provision of the first and second abutment surfaces 35 and 36 can make the driving of the first and

second driving levers

4221 and 4222 more stable.

As shown in fig. 7 and 8, in the initial state, when the moving member 30 is located at the locking position, the first tooth of the moving member 30 is engaged with the first tooth groove on the base 10 to lock the steering member 20, so that the jaw assembly 200 is locked. When the steering knob 41 is operated to drive the transmission mechanism 42, the mover 30 is moved distally to the unlocking position by the first driving lever 4221 or the second driving lever 4222 of the transmission mechanism 42, the first teeth and the first tooth grooves are disengaged, and the steering member 20 is unlocked. In the process, the torsion spring 51 is compressed to store energy, as shown in fig. 9 and 10. When the first tooth is disengaged from the first tooth slot, the moving member 30 drives the steering member 20 to rotate about the base 10 (a pivot member is provided between the base 10 and the steering member 20 to achieve a pivotal connection of the base 10 and the steering member 20, the pivot member including a circular hole and a cylinder) under the drive of the first drive lever 4221 or the second drive lever 4222, and the steering member 20 is connected to the proximal end of the jaw assembly, thereby enabling the jaw assembly to rotate, as shown in fig. 11 and 12. It will be appreciated that the movement member 30 will drive the steering member 20 in a first direction by the first drive rod 4221 and the movement member 30 will drive the steering member 20 in a second direction by the first drive rod 4221, the first and second directions being opposite to each other, to effect bi-directional rotation of the jaw assembly. When the jaw assembly is rotated to a desired angle, the first and second drive levers 4221 and 4222 are deactivated, at which time the torsion spring 51 begins to release the elastic potential energy, and the first and second

torsion spring arms

512 and 513 on either side of the torsion spring 51 push the first and second mounting

portions

31 and 32 on either side of the moving member 30, causing the moving member 30 to move proximally to the locked position, at which time the first tooth reengages the first tooth slot to re-lock the steering member 20, as shown in fig. 13 and 14.

Referring to fig. 25-44, a second embodiment of the present invention, like the first embodiment, is directed to a jaw assembly drive for a surgical instrument. The present embodiment differs from the first embodiment in that the movement member 30 is pivotably connected to the steering member 20, the movement member 30 being pivotally moved distally from the locked position to the unlocked position by the drive member 40; when the moving member 30 moves to the unlocking position, the steering member is driven to rotate under the action of the driving member 40, so that the jaw assembly is rotated. Wherein "distal pivotal movement" means that the projection of the distal point a of the mover at the horizontal plane is A1 in the locked position, and its projection A2 at the horizontal plane is offset proximally and distally relative to A1 during the pivotal movement.

In order to achieve a pivotal connection of the movement member 30 and the turning member 20, in this embodiment a pivot structure 70 is provided between the movement member 30 and the turning member 20. The pivot structure may be Kong Zhoushi, a post-hole type, or the like, and in this embodiment, a post-hole type is employed, and specifically, the pivot structure 70 includes a pivot hole 71 and a pivot post 72, the pivot post 72 being inserted into the pivot hole 71, one of the pivot post 72 and the pivot hole 71 being provided on the steering member 20, and the other of the pivot post 72 and the pivot hole 71 being provided on the moving member 30. The arrangement described above can effectively reduce the complexity of the structure and enable a pivotal connection. At the same time, the above arrangement can effectively ensure the structural strength of the pivot post 72, thereby improving the service life. In this embodiment, the jaw assembly drive for a surgical instrument further comprises a nesting structure 80, the nesting structure 80 being disposed between the steering member 20 and the moving member 30, and the pivot structure 70 being disposed between the nesting structures 80. Specifically, the steering member 20 includes a projection 21, the mover 30 includes a recess 37, the projection 21 is inserted into the recess 37, and the projection 21 and the recess 37 form a nesting structure 80. The bump 21 and the groove 37 are simple in structure and convenient to set. In the present embodiment, the pivot hole 71 is disposed on the boss 21 of the steering member 20, the pivot post 72 is disposed in the recess 37 of the moving member 30, more specifically, the pivot hole 71 is a half hole, the pivot post 72 includes an arc segment 721, a plane segment 722 and a connection segment 723, which are connected to each other, the arc segment 721 is disposed in the half hole, and the plane segment 722 abuts against the base 10. Such a design facilitates the mounting of the moving member 30 with the diverting member 20 on the one hand and the movement of the moving member 30 is more stable on the other hand.

To prevent interference with other components during the distal pivotal movement of the mover 30 from the locked position to the unlocked position due to space constraints, the thickness of the middle portion of the mover 30 is greater than the thickness of the distal end of the mover 30 and the proximal end of the mover 30.

In this embodiment, the moving member 30 is provided with a second locking member 341, the base 10 is provided with a first locking member 121, and when the moving member 30 is in the locking position, the first locking member 121 and the second locking member 341 are in plug-in fit to lock the steering member 20.. One of the first and

second locking members

121 and 341 includes a second tooth, and the other of the first and

second locking members

121 and 341 includes a second tooth groove, and when the moving member 30 is pivotally moved from the locking position to the unlocking position, the second tooth and the second tooth groove are separated to unlock the steering member 20. The second convex teeth and the second tooth grooves are simple in structure and good in locking effect. Specifically, in the present embodiment, the first locking member 121 includes a second tooth slot, and the second locking member 341 includes a second tooth protrusion. The second tooth is disposed at the proximal end of the moving member 30, and the second tooth slot is disposed at the distal end of the base 10. The number of the second tooth grooves is one, and the number of the second tooth grooves is a plurality. Of course, the number of the second teeth and the second tooth grooves can be multiple, or the number of the second teeth is multiple, and the number of the second tooth grooves is one.

The jaw assembly drive further includes a biasing member, in this embodiment a second biasing member 90, the second biasing member 90 biasing the moving member 30 proximally to retain the moving member 30 in the locked position when the moving member 30 is driven to pivotally move from the locked position to the unlocked position, the second biasing member 90 being compressively stored energy. The second biasing member 90 is configured to provide energy for the return of the moving member 30. When no external force is applied to the moving member 30, the moving member 30 is capable of being pivotally moved proximally from the unlocking position to the locking position by the second biasing member 90. Also, in the present embodiment, the second biasing member 90 is a torsion spring including a spiral portion and first and second torsion spring arms connected to both sides of the spiral portion, the moving member 30 is provided with first and second mounting

portions

31 and 32, the steering member 20 is provided with a third mounting portion, and the first and second torsion spring arms are respectively abutted and engaged with the first and second mounting

portions

31 and 32, and the spiral portion is provided in the third mounting portion. The first mounting portion 31 and the second mounting portion 32 can be matched with the driving member 40, so that the pivoting movement of the moving member is more stable when the driving member 40 drives the moving member 30. Preferably, the first mounting portion 31 and the second mounting portion 32 are both cones, and the first end of the first mounting portion 31 and the second mounting portion 32 near the base 10 is smaller in size than the first end of the first mounting portion 31 and the second mounting portion 32 far from the base 10. The above arrangement increases the arm of the pivoting motion of the moving member 30, so that the doctor operates the rotation knob to drive the driving member 40, thereby saving more effort when driving the moving member 30 to move, and improving the product experience.

26-28, in the initial state, when the moving member 30 is located at the locking position, the second tooth of the moving member 30 is engaged with the second tooth groove on the base 10 to lock the steering member 20, so that the jaw assembly 200 is locked. When the steering knob 41 is operated to drive the transmission mechanism 42, the moving member 30 is pivoted distally to the unlocking position by the follower 422, the second tooth and the second tooth groove are disengaged, and the steering member 20 is unlocked. In the process, the second biasing member 90 is charged as shown in fig. 29 to 32. When the second tooth is disengaged from the second tooth slot, the moving member 30 drives the turning member 20 to rotate around the base 10 under the driving of the driven member 422, and the turning member 20 is connected to the proximal end of the jaw assembly, thereby achieving the rotation of the jaw assembly, as shown in fig. 33 to 35. It will be appreciated that the movement member 30 will drive the steering member 20 in a first direction by the first drive rod 4221 and the movement member 30 will drive the steering member 20 in a second direction by the first drive rod 4221, the first and second directions being opposite to each other, to effect bi-directional rotation of the jaw assembly. When the jaw assembly is rotated to the desired angle, the drive follower 422 is stopped, at which point the second biasing member 90 begins to release the spring potential energy, causing the movement member 30 to pivot proximally to the locked position, at which point the second teeth reengage the second splines to re-lock the steering member 20, as shown in fig. 36-39.

The present invention also provides a third embodiment, which is identical to the first and second embodiments, and relates to a jaw assembly drive for a surgical instrument for controlling the rotation and locking of the jaw assembly. In this embodiment, the jaw assembly drive comprises a housing 10, a steering assembly, a drive member 40, and a biasing member; the housing 10 is connected to the body of the surgical instrument, and the distal end of the steering assembly is connected to the jaw assembly 200 such that the steering assembly is locked, unlocked, and rotated in synchronization with the jaw assembly 200, and the proximal end of the steering assembly is pivotally connected to the housing 10; the steering assembly has a locked state and an unlocked state, the steering assembly being driven by the driving member 40 to transition from the locked state to the unlocked state, the biasing member biasing the steering assembly to transition from the unlocked state to the locked state; in the locked condition, the biasing member biases the steering assembly proximally to bring the steering assembly into locking engagement with the housing 10; in the unlocked state, the steering assembly drives the jaw assembly in rotation under the influence of the drive member 40, and the biasing member is compressed for energy storage. Compared with the prior art, the jaw assembly driving device for the surgical instrument is provided with a complex locking structure at the knob end far away from the jaw assembly to lock and unlock the jaw assembly, so that the jaw assembly can be effectively locked; the jaw assembly driving device has fewer parts, simple and compact overall structure and high reliability of locking and steering of the jaw assembly;

Specifically, the steering assembly includes a steering member 20 and a moving member 30, the moving member 30 is movably connected with the steering member 20, the distal end of the steering member 20 is connected with the jaw assembly 200, so that the steering member 20 is synchronously locked, unlocked and rotated with the jaw assembly 200, and the proximal end of the steering member 20 is pivotably connected with the housing 10; the mover 30 has a locked position and an unlocked position; the driving member 40 drives the moving member 30 distally from the locked position to the unlocked position, thereby causing the steering assembly to transition from the locked state to the unlocked state; the biasing member biases the moving member 30 proximally from the unlocked position to the locked position, thereby transitioning the steering assembly from the unlocked state to the locked state; in the locked position, the biasing member biases the moving member 30 to engage the moving member 30 with the seat body 10 to lock the steering member 20; in the unlocking position, the moving member 30 is separated from the base 10 to unlock the steering member 20, and the moving member 30 drives the steering member 20 to rotate under the action of the driving member 40. Wherein the moving member 30 is movably connected with the steering member 20, and the moving member 30 is driven by the driving member 40 to move distally from the locking position to the unlocking position, and the specific implementation is the same as that of the first embodiment; alternatively, the moving member 30 is pivotally connected to the steering member 20, and the moving member 30 is driven by the driving member 40 to move from the locked position to the unlocked position in a distal pivoting manner. The specific structures of the steering member 20, the moving member 30, the driving member 40 and the biasing member, the connection relationship and the movement relationship between each other are the same as those of the first embodiment or the second embodiment, and are not repeated here.

According to another aspect of this embodiment, there is provided a surgical instrument comprising a shaft assembly 300, a handle assembly 400 disposed at a proximal end of the shaft assembly 300, a jaw assembly 200 disposed at a distal end of the shaft assembly 300, and a body disposed within the shaft assembly 300, the surgical instrument further comprising the jaw assembly drive device described above disposed in part within the shaft assembly 300 for controlling locking, unlocking and rotation of the jaw assembly 200. In this embodiment, the surgical instrument is a stapler, the jaw assembly 200 of which includes a cartridge housing 101 and a staple abutment 102 pivotally connected to the cartridge housing 101. Shaft assembly 300 includes a sleeve coupled to a proximal end of jaw assembly 200, a mandrel assembly received within the sleeve, and a cutter assembly coupled to the mandrel assembly. The steering member 20 is also provided with pin holes 24. The nail bin seat 101 is provided with a notch 1012 and a special-shaped groove 1011, and a cylindrical shaft 1021 is arranged corresponding to the nail abutting seat 102. The cylindrical shaft 1021 on the abutment 102 is inserted into the notch 1012 of the cartridge holder 101 and snapped into the profiled slot 1011 thereof to form part of the jaw assembly 200, as illustrated in fig. 45. In the jaw assembly 200, a circular connection port 1013 is further provided on the cartridge seat 101, and after the circular connection port 1013 is aligned with the pin hole 24 provided on the steering member 20, the spring pin 103 is inserted to fixedly connect the jaw assembly 200 to the steering member 20.

The stapler also includes a drive mechanism for driving the shaft assembly 300 in motion to drive the cutting blade assembly in motion and/or for driving the jaw assembly 200 in motion, and a power source for powering the drive mechanism. Specifically, the power source drives the sleeve to move through the jaw assembly driving mechanism so as to drive the nail propping seat 102 to pivot relative to the nail bin seat 101 to realize opening and closing of the jaw assembly 200, and drives the cutting knife assembly to move forwards through the cutting knife assembly driving mechanism so as to realize firing and backward movement so as to realize retracting, wherein the power source can be a handle for manual operation or a motor. The jaw assembly driving mechanism, the cutter assembly driving mechanism and the power source are all in the prior art, and specific structural components can be seen in the applicant's prior application CN202010365525.0, and are not described herein. It should be noted that the above embodiments have been described with respect to a surgical instrument using a stapler as an example, and that the above embodiments may be applied to other surgical instruments having a jaw assembly.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A jaw assembly drive for a surgical instrument for controlling locking, unlocking and rotation of a jaw assembly, the jaw assembly drive comprising:

a housing (10), the housing (10) being connected to the body of the surgical instrument;

a steering member (20), a distal end of the steering member (20) being connected to the jaw assembly such that the steering member (20) is locked, unlocked and rotated in synchronization with the jaw assembly, a proximal end of the steering member (20) being pivotably connected to the housing (10);

a moving member (30), the moving member (30) being movably connected to the steering member (20), the moving member (30) having a locked position and an unlocked position;

-a drive member (40), the drive member (40) driving the movement member (30) distally from the locked position to the unlocked position; in the locking position, the moving member (30) cooperates with the seat (10) to lock the steering member (20); in the unlocking position, the moving member (30) is separated from the base (10) to unlock the steering member (20), and the driving member (40) moves distally to drive the steering member (20) to rotate by the moving member (30).

2. A jaw assembly drive for a surgical instrument for controlling locking, unlocking and rotation of a jaw assembly, characterized in that,

the jaw assembly driving device comprises a base body (10), a steering assembly, a driving piece (40) and a biasing piece;

the base body (10) is connected with the body of the surgical instrument; the distal end of the steering assembly is connected with the jaw assembly so that the steering assembly is synchronously locked, unlocked and rotated with the jaw assembly, and the proximal end of the steering assembly is pivotally connected with the seat body (10);

the steering assembly having a locked state and an unlocked state, the steering assembly being driven by the drive member (40) to transition from the locked state to the unlocked state, the biasing member biasing the steering assembly from the unlocked state to the locked state; in the locked state, the biasing member biases the steering assembly proximally to lock the steering assembly with the housing (10); in the unlocked state, the steering assembly drives the jaw assembly to rotate under the action of the driving piece (40), and the biasing piece is compressed and stored energy.

3. The jaw assembly drive for a surgical instrument of claim 2, wherein the steering assembly comprises a steering member (20) and a moving member (30), the moving member (30) being movably connected with the steering member (20), a distal end of the steering member (20) being connected with the jaw assembly such that the steering member (20) is synchronously locked, unlocked and rotated with the jaw assembly, a proximal end of the steering member (20) being pivotably connected with the housing (10); the moving member (30) has a locked position and an unlocked position; the drive member (40) driving the movement member (30) distally from the locked position to the unlocked position, thereby causing the steering assembly to transition from the locked state to the unlocked state; the biasing member biases the moving member (30) proximally from the unlocked position to the locked position, thereby transitioning the steering assembly from the unlocked state to the locked state; in the locked position, the biasing member biases the moving member (30) to engage the moving member (30) with the housing (10) to lock the steering member (20); when the unlocking position is reached, the moving part (30) is separated from the base body (10) to unlock the steering part (20), and the moving part (30) drives the steering part (20) to rotate under the action of the driving part (40).

4. The jaw assembly drive for a surgical instrument of claim 1, further comprising a biasing member that biases the moving member (30) proximally to retain the moving member (30) in the locked position when the moving member (30) is driven from the locked position to an unlocked position, the biasing member being compressively stored energy.

5. The jaw assembly drive for a surgical instrument of claim 4, wherein a distal end of the biasing member is coupled to the steering member (20) and a proximal end of the biasing member is coupled to the moving member (30).

6. The jaw assembly drive for a surgical instrument of claim 4, wherein the biasing member is a resilient member.

7. The jaw assembly drive for a surgical instrument of claim 3 or 4, wherein said moving member (30) is movably coupled to said steering member (20), said drive member (40) being moved distally to drive said moving member (30) distally from said locked position to said unlocked position, said biasing member biasing said moving member (30) proximally from said unlocked position to said locked position.

8. The jaw assembly drive for a surgical instrument of claim 7, wherein said moving member (30) is slidably coupled to said steering member (20), a distal end of said moving member (30) being spaced apart from a proximal end of said steering member (20) in said locked position; in the unlocked position, the distal end of the moving member (30) abuts the proximal end of the steering member (20).

9. The jaw assembly drive for a surgical instrument of claim 7, further comprising a motion guide (60), the motion member (30) being guided by the motion guide (60) to move between the locked position and the unlocked position.

10. The jaw assembly driving device for a surgical instrument according to claim 9, wherein the movement guide (60) comprises a sliding rail structure (61), the movement member (30) being moved in the extension direction of the sliding rail structure (61).

11. The jaw assembly drive for a surgical instrument of claim 10 wherein,

the sliding rail structure (61) comprises a sliding block (611) and a sliding groove (612), the sliding block (611) is in sliding fit with the sliding groove (612), one of the sliding block (611) and the sliding groove (612) is arranged on the steering piece (20), and the other of the sliding block (611) and the sliding groove (612) is arranged on the moving piece (30).

12. The jaw assembly driving device for a surgical instrument according to claim 11, wherein the slide (611) is provided to the steering member (20), the slide (612) is provided to the moving member (30), the slide (611) comprises a slide body (6111) and a ledge (6112) provided on the slide body (6111), the slide (612) comprises a slide body section (6121) slidingly engaged with the slide body (6111) and a first limit stage (6122) engaged with the ledge (6112).

13. The jaw assembly drive for a surgical instrument of claim 3 or 4, wherein said moving member (30) is pivotally connected to said steering member (20), said drive member (40) driving said moving member (30) from said locked position to said unlocked position pivotally moving said moving member (30) proximally from said unlocked position to said locked position.

14. The jaw assembly drive for a surgical instrument of claim 13, wherein a pivot structure (70) is provided between the moving member (30) and the steering member (20).

15. The jaw assembly drive for a surgical instrument of claim 14, wherein the pivot structure (70) includes a pivot hole (71) and a pivot post (72), the pivot post (72) being inserted into the pivot hole (71), one of the pivot post (72) and the pivot hole (71) being disposed on the steering member (20), the other of the pivot post (72) and the pivot hole (71) being disposed on the moving member (30).

16. The jaw assembly drive for a surgical instrument of claim 14, further comprising a nesting structure (80), wherein the nesting structure (80) is disposed between the steering member (20) and the moving member (30), and wherein the pivot structure (70) is disposed between the nesting structure (80).

17. The jaw assembly drive for a surgical instrument of claim 16, wherein the steering member (20) comprises a tab (21), the moving member (30) comprises a recess (37), the tab (21) is inserted into the recess (37), and the tab (21) and the recess (37) form the nesting feature (80).

18. The jaw assembly drive for a surgical instrument of claim 13, wherein a thickness of a middle portion of the moving member (30) is greater than a thickness of a distal end of the moving member (30) and a proximal end of the moving member (30).

19. A jaw assembly driving device for a surgical instrument according to claim 1 or 3, characterized in that the housing (10) comprises a first body (12), the first body (12) being provided with a first locking member (121); the moving member (30) comprises a second body (34), the second body (34) being provided with a second locking member (341); in the locking position, the first locking member (121) and the second locking member (341) cooperate to achieve locking of the moving member (30) with the housing (10); in the locked position, the first locking member (121) and the second locking member (341) are separated to enable the moving member (30) to be separated from the housing (10).

20. The jaw assembly drive for a surgical instrument of claim 19, wherein one of said first locking member (121) and said second locking member (341) comprises a lobe and the other of said first locking member (121) and said second locking member (341) comprises a tooth slot.

21. A jaw assembly drive for a surgical instrument according to claim 1 or 3, characterized in that the drive (40) comprises a steering knob (41) and a transmission (42); the transmission mechanism (42) is connected with the moving piece (30), and the steering knob (41) rotates to drive the transmission mechanism (42) to move, so that the moving piece (30) is driven to move.

22. The jaw assembly driving device for a surgical instrument according to claim 21, wherein the transmission mechanism (42) comprises a driving member (421), a driven member (422) connected to the moving member (30), the driven member (422) being driven by the driving member (421), the driving member (421) being driven by the steering knob (41).

23. The jaw assembly drive for a surgical instrument of claim 22, wherein said follower (422) comprises a first drive rod (4221) and a second drive rod (4222), said moving member (30) being coupled to said first drive rod (4221) and said second drive rod (4222), respectively, said driving member (421) driving said first drive rod (4221) and said second drive rod (4222) in tandem.

24. The jaw assembly drive for a surgical instrument of claim 23, wherein said movement member (30) comprises a first abutment surface (35) and a second abutment surface (36), said first drive rod (4221) being in abutting engagement with said first abutment surface (35) when advanced and said second drive rod (4222) being in abutting engagement with said second abutment surface (36) when advanced.

25. The jaw assembly drive for a surgical instrument of claim 23, wherein the active member (421) comprises a first active lever (4211) and a second active lever (4212), the first active lever (4211) being connected to the first drive lever (4221), the second active lever (4212) being connected to the second drive lever (4222).

26. A surgical instrument comprising a shaft assembly, a handle assembly disposed at a proximal end of the shaft assembly, a jaw assembly disposed at a distal end of the shaft assembly, and a body disposed within the shaft assembly, characterized in that: the surgical instrument further comprising a jaw assembly drive according to any one of claims 1 to 25 for controlling locking, unlocking and rotation of the jaw assembly.