CN112401955B

CN112401955B - Driving device for intracavity surgery stitching instrument and stitching instrument

Info

Publication number: CN112401955B
Application number: CN202011120499.1A
Authority: CN
Inventors: 向长林; 施俭; 陆坚
Original assignee: Suzhou Beinuo Medical Instruments Co Ltd
Current assignee: Suzhou Beinuo Medical Instruments Co Ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-06-15
Anticipated expiration: 2040-10-19
Also published as: CN112401955A

Abstract

The application provides a driving device for an intracavity surgical stitching instrument and the stitching instrument, which comprises a driving handle, a driving structure and a shell, wherein the driving structure comprises a driving connecting rod component, a clamping driving component, a positioning needle driving component and a nail pushing driving component, the clamping driving component drives a clamping push rod to realize clamping, the positioning needle driving component drives the positioning needle push rod to drive a positioning needle, the nail pushing driving component drives the nail pushing push rod to drive a nail pushing block, the driving handle pushes the driving connecting rod component to move from a first position to a third position so as to enable the positioning needle driving component and the clamping driving component to move axially, when the driving connecting rod assembly is positioned at the first position, the driving connecting rod assembly limits the nail pushing driving assembly so that the nail pushing driving assembly is not contacted with the nail pushing push rod under the driving of the driving handle, when the driving connecting rod assembly is located at the third position, the nail pushing driving assembly pushes the nail pushing push rod under the driving of the driving handle. The positioning needle, the clamping and the nail pushing of the stitching instrument are completed through a single handle, and the operation is simple.

Description

Driving device for intracavity surgery stitching instrument and stitching instrument

Technical Field

The invention relates to a medical instrument, in particular to a driving device for an intracavity surgical stitching instrument and the stitching instrument.

Background

The transverse cutting anastomat/stitching instrument is mainly used for the creation of an anastomosis opening and the closure of a stump or an incision in the operations of reconstructing a digestive tract and excising organs, wherein the operation field is difficult to expose. At present, the transverse cutting anastomat is generally used in the following process: after the locking handle positions and locks tissues, the firing handle is pushed, the cutter hidden in the nail bin assembly is pushed by the center rod driven by the firing handle, the other side of the tissues to be cut is a nail abutting seat and a cutter pad providing a tissue cutting platform, and the whole cutting process of the driven straight cutter is to cut off the cutter pad to represent that the cutting task is completed. Compared with a transverse cutting anastomat, the transverse stapler has one less cutter, drives the suturing nail to enable the suturing nail to be approximately same as the process of suturing human tissues, and is mainly used for surgical operations which do not need cutting but need suturing.

The transverse cutting anastomat/stitching instrument is commonly used in open type operation, the open type operation has better visual field, but has the defects of large wound, slow recovery and the like. The minimally invasive surgery focuses on improvement and rehabilitation of psychology, society, physiology (pain), psychology and appearance and life quality of a patient, is attached to the patient to the greatest extent, relieves pain of the patient, and the endoscopic surgery is a newly developed minimally invasive method and is an inevitable trend for development of future surgical methods. With the rapid advance of industrial manufacturing technology, the fusion of related disciplines lays a firm foundation for the development of new technology and new method, and the more and more skillful operation of doctors makes many of the past open operations replaced by the intracavitary operations, thereby greatly increasing the operation selection opportunities. The traditional method of the endoscopic surgery is to make three small incisions in the body of a patient, insert a pipeline-shaped working channel respectively, and carry out all the following operations through the three pipelines; and then special lengthened surgical instruments are used for completing the same steps as the open surgery under the television monitoring, so that the same surgical effect is achieved. However, in the prior art, the driving device is realized through a gear structure, the structure is complex, at least two handles are needed for completing all operations, and the operation process is not simple and convenient enough.

Therefore, it is desirable to provide a driving device for an intracavity surgical stapler and a stapler to solve the above technical problems.

Disclosure of Invention

The technical scheme of the invention is realized as follows:

the application provides a driving device for an intracavity surgical stapler, which comprises a driving handle, a driving structure and a shell, wherein the driving structure comprises a driving connecting rod component, a clamping driving component, a positioning needle driving component and a nail pushing driving component, the clamping driving component is used for driving a clamping push rod to realize clamping, the positioning needle driving component is used for driving the positioning needle push rod to drive a positioning needle, the nail pushing driving component is used for driving the nail pushing push rod to drive a nail pushing block,

one end of the driving connecting rod assembly is rotatably connected with the shell, the other end of the driving connecting rod assembly is rotatably connected with the clamping driving assembly, the clamping driving assembly is connected with the positioning pin driving assembly in a matched mode, the driving handle is used for driving the driving connecting rod assembly to move from the first position to the third position so that the positioning pin driving assembly and the clamping driving assembly move axially, when the driving connecting rod assembly is located at the first position, the driving connecting rod assembly is opposite to the nail pushing driving assembly, so that the nail pushing driving assembly is not in contact with a nail pushing push rod under the driving of the driving handle, and when the driving connecting rod assembly is located at the third position, the nail pushing driving assembly pushes the nail push rod under the driving of the driving handle.

Further, the nail pushing driving assembly comprises a nail pushing driving piece and a biasing piece, the clamping driving assembly is provided with a sliding groove, the sliding groove is matched with the nail pushing driving piece in a sliding mode, the sliding groove is used for guiding the nail pushing driving piece in a sliding mode, and the biasing piece is used for pushing the nail pushing driving piece upwards.

Further, the driving connecting rod assembly comprises a first connecting rod and a second connecting rod, the first connecting rod is connected with the second connecting rod in a hinged mode, and one end of the first connecting rod is rotatably connected with the shell.

Further, the second connecting rod with centre gripping drive assembly articulates the connection, location needle drive assembly includes drive accessory and location needle driving piece, drive accessory with location needle driving piece articulates the connection, centre gripping drive assembly includes the drive spout, the drive accessory is equipped with the arch, protruding with drive spout joint and slip matching work as drive link assembly removes the in-process to the second position by the primary importance, location needle drive assembly with centre gripping drive assembly passes through protruding with the joint of drive spout makes both synchronous motion, works as drive link assembly removes the in-process to the third position by the second position, location needle drive assembly with centre gripping drive assembly passes through protruding with the slip matching of drive spout makes both relative motion.

Further, drive structure still includes connecting rod locating part, connecting rod locating part is equipped with spacing face, spacing face is used for making drive link assembly keeps in the third position in order to avoid promoting its resilience force causes the centre gripping not hard up behind the centre gripping push rod.

Furthermore, the driving structure includes a reset driving member and a first reset elastic member, the reset driving member is used for driving the connecting rod limiting member, so that the connecting rod limiting member pushes the driving connecting rod assembly to move from the third position to the first position, one end of the first reset elastic member is fixedly connected with the housing, and the other end of the first reset elastic member is connected with the connecting rod limiting member.

Further, the drive structure still includes the subassembly that resets, the subassembly that resets includes the piece that resets and the handle elastic component that resets, the casing is equipped with the spout that resets, reset the piece with the spout that resets slides and matches, reset the piece with the pilot pin drive assembly is connected, the handle one end of elastic component that resets with casing fixed connection, the handle reset the other end of elastic component with drive handle connects.

Further, drive accessory's first end with the casing rotates to be connected, drive accessory's second end is located the top of pilot pin driving piece just drive accessory cover is located the outside of pilot pin driving piece, the arch is located drive accessory's middle part, the top of pilot pin driving piece is equipped with the atress piece, works as drive accessory along when centre gripping drive assembly's axial displacement takes place to rotate, drive accessory's second end with the distal end face contact of atress piece and promotion the atress piece is to near-end axial displacement.

Furthermore, the clamping driving assembly is provided with a guide hole, the guide hole is long-strip-shaped, the shell is provided with a second limiting part, the second limiting part is matched with the guide hole in a sliding mode, and the guide hole is used for guiding the clamping driving assembly so that the moving direction of the clamping driving assembly is only axial movement.

On the other hand, this application still provides a stitching instrument for intracavity operation, including pilot pin push rod, centre gripping push rod, push away nail push rod and foretell drive arrangement who is used for intracavity operation stitching instrument, the one end of pilot pin push rod with pilot pin drive assembly's one end rotates the joint, the one end of centre gripping push rod with centre gripping drive assembly one end rotates the joint, push away the one end of nail push rod with push away nail drive assembly's one end and rotate the joint.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

(1) the invention provides a driving device for an intracavity surgical stapler and the stapler, which have simple structure, complete three steps of positioning needle driving, clamping driving and nail pushing driving of the stapler through a plurality of connecting rod assemblies and driving handles, and have convenient operation because the operation can be completed through a single handle through the design of a single handle.

(2) Through the design of the limiting surface on the connecting rod limiting part, after the driving connecting rod assembly moves to the third position, the limiting surface limits the driving connecting rod assembly, the clamping looseness of a clamping structure at the near end of the stitching instrument caused by resilience force generated by stitching objects in the nail pushing process is avoided, and the resetting of the driving device is realized through the resetting driving part and the resetting assembly.

Drawings

FIG. 1 is an enlarged fragmentary view of a drive linkage assembly in a third position in a stapler according to an embodiment of the invention.

FIG. 2 is an enlarged, fragmentary view of another alternate perspective of the drive linkage assembly in a third position in the stapler according to an embodiment of the invention.

FIG. 3 is a partial cross-sectional view of a clamp drive assembly and staple pusher bar according to an embodiment of the present invention.

FIG. 4 is a schematic view of the connection between the clamp driving assembly and the positioning pin driving assembly according to the embodiment of the present invention.

FIG. 5 is an enlarged fragmentary view of a drive linkage assembly in a first position in a stapler according to an embodiment of the invention.

FIG. 6 is an enlarged, fragmentary view of another alternate view of the drive linkage assembly in the first position in the stapler according to an embodiment of the invention.

FIG. 7 is a partially enlarged schematic view of the relative relationship between the drive link assembly and the link position limiter and the reset driver according to the embodiment of the present invention.

FIG. 8 is an external view of a stapler according to an embodiment of the invention.

FIG. 9(a) (b) (c) (d) is a schematic view of a clamping driving assembly according to an embodiment of the present invention.

Fig. 10(a), 10(b), and 10(c) are schematic views illustrating the return of the driving link according to the embodiment of the present invention.

FIG. 11 is a schematic view of a staple pusher bar located within a clamping drive assembly in accordance with an embodiment of the present invention.

Fig. 12 is a schematic structural view of a driving fitting according to an embodiment of the present invention.

FIG. 13 is a schematic view of the relative sliding movement of the staple pushing driving member and the clamping driving member according to the embodiment of the present invention.

FIG. 14 is a schematic view of the engagement of the staple driving member with the staple pusher in an embodiment of the present invention.

FIG. 15 is an enlarged fragmentary view of a drive linkage assembly in a second position in the stapler according to an embodiment of the invention.

FIGS. 16(a) and 16(b) are schematic views of a clamping pusher bar assembly, a positioning needle pusher bar assembly and a staple pusher bar according to an embodiment of the present invention.

FIG. 17 is a schematic view of the engagement of the retaining push rod with the positioning pin push rod in the embodiment of the present invention.

FIG. 18 is a schematic partial cross-sectional view of a clamping ram in an embodiment of the invention.

Fig. 19 is a schematic view of a second housing in an embodiment of the invention.

Fig. 20 is a cross-sectional view of a control member in an embodiment of the present invention.

Fig. 21 is a top view showing the overall appearance of the embodiment of the present invention.

FIG. 22 is a schematic structural view of a cartridge housing according to an embodiment of the present invention.

FIG. 23 is a schematic view of an anvil and connecting outer tube according to an embodiment of the present invention.

FIG. 24 is a schematic view of the anvil and clamping ram in accordance with an embodiment of the present invention.

FIG. 25 is a schematic view of the internal structure of the positioning pin after positioning is completed according to the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1-15, the present embodiment provides a suturing device for intracavity surgery, which includes a pushing rod 41, a clamping pushing rod 42, a nail pushing rod 43 and a driving device for the suturing device for intracavity surgery, wherein one end of the pushing rod 41 is rotatably clamped with one end of the positioning needle driving assembly 23, one end of the clamping pushing rod 42 is rotatably clamped with one end of the clamping driving assembly 22, and one end of the nail pushing rod 43 is rotatably clamped with one end of the nail pushing driving assembly 24.

The embodiment provides a driving device for an intracavity surgical stapler, which comprises a driving handle 1, a driving structure 2 and a shell 3, wherein the driving structure 2 comprises a driving connecting rod assembly 21, a clamping driving assembly 22, a positioning needle driving assembly 23 and a nail pushing driving assembly 24, the clamping driving assembly 22 is used for driving a clamping push rod 42 to realize clamping, the positioning needle driving assembly 23 is used for driving a push rod 41 to drive a positioning needle 51, the nail pushing driving assembly 24 is used for driving a nail pushing push rod 43 to drive a nail pushing block 52, one end of the driving connecting rod assembly 21 is rotatably connected with the shell 3, the other end of the driving connecting rod assembly 21 is rotatably connected with the clamping driving assembly 22, the clamping driving assembly 22 is in matching connection with the positioning needle driving assembly 23, the driving handle 1 is used for driving the driving connecting rod assembly 21 to move from a first position to a third position to axially move the positioning needle driving assembly 23 and the clamping driving assembly 22, when the driving linkage assembly 21 is located at the first position, the driving linkage assembly 21 limits the nail pushing driving assembly 24, so that the nail pushing driving assembly 24 is not contacted with the nail pushing push rod 43 under the driving of the driving handle 1, and when the driving linkage assembly 21 is located at the third position, the nail pushing driving assembly 24 pushes the nail pushing rod 43 under the driving of the driving handle 1. 3, 5, 6 are schematic views of the drive linkage assembly in the drive arrangement in a first position; FIG. 15 is a schematic view of the drive linkage assembly of the drive device in a second position; fig. 1-2 are schematic views of the drive linkage assembly of the drive device in a third position.

The driving device and the stitching instrument provided by the invention have simple structures, the three steps of positioning needle driving, clamping driving and nail pushing driving of the stitching instrument are completed through the connecting rod assemblies and the driving handle, and the operation can be completed through a single handle through the single-handle design, so that the operation is convenient.

Further, as shown in fig. 11, 13 and 14, the staple driving assembly 24 includes a staple driving member 241 and a biasing member 242, the clamping driving assembly 22 is provided with a slide slot 222, the slide slot 222 is slidably matched with the staple driving member 241, the slide slot 222 is used for slidably guiding the staple driving member 241, the biasing member 242 is used for pushing the staple driving member 241, the driving handle 1 is hinged with the staple driving member 241, and the staple driving member 241 performs staple pushing through a proximal portion. The biasing member 242 may be a torsion spring, a coil spring, a leaf spring, a bungee cord, or other device or element capable of providing a biasing force in a particular direction.

Wherein, when the driving handle 1 pushes the driving link assembly 21 to move from the first position to the third position, the staple pushing driving member 241 slides in the sliding slot 222 under the pushing action of the driving handle 1 and the biasing member 242, i.e. in the process, the staple pushing driving member 421 does not act as a staple, the biasing member 242 overcomes the biasing force to drive through the sliding slot 222, and in the process, the staple pushing rod relatively moves from the inside of the cavity of the clamping driving assembly to the part exposed outside the clamping driving assembly; after the driving link assembly 21 reaches the third position, since the driving handle 1 is hinged to the nail pushing driving member 241, when the operator releases the driving handle 1, the driving handle 1 drives the nail pushing driving member 241 to move towards the distal end in the resetting process, at this time, the proximal end of the nail pushing driving member 241 faces the nail pushing push rod 43, when the operator grips the driving handle 1 again, the driving handle 1 pushes the nail pushing push rod 43, and simultaneously the nail pushing rod 43 pushes the nail pushing block at the proximal end, so as to push out the nail.

Further, as shown in fig. 7 and 10, the driving link assembly 21 includes a first link 211 and a second link 212, the first link 211 is connected to the second link 212 in a hinged manner, and one end of the first link 211 is rotatably connected to the housing 3. The driving structure 2 further includes a connecting rod limiting member 25, the connecting rod limiting member 25 is provided with a limiting surface 251, and the limiting surface 251 is used for keeping the driving connecting rod assembly 21 at the third position to avoid clamping looseness caused by resilience of the driving connecting rod assembly after the clamping push rod 42 is pushed. The driving structure 2 includes a reset driving member 26 and a first reset elastic member, the reset driving member 26 is used for driving the connecting rod limiting member 25, so that the connecting rod limiting member 25 pushes the driving connecting rod assembly 21 to move from the third position to the first position, one end of the first reset elastic member is fixedly connected to the housing 3, and the other end of the first reset elastic member is connected to the connecting rod limiting member 25.

In this embodiment, the first elastic return element is a torsion spring, the limiting surface 251 of the link limiting element 25 is composed of two planes forming an obtuse angle, and the limiting surface 251 limits the driving link assembly 21 to keep it at the third position to avoid the clamping looseness caused by the resilience of the clamping push rod 42 after pushing the clamping push rod 42. The link limiting member is connected to the reset driving member, and the reset driving member is connected to one end of the first reset operation member 261 outside the housing 3 through the housing 3. When the operator pushes the first reset operation member 261 towards the proximal end, the first reset operation member 261 rotates towards the proximal end to drive the reset driving member 26 to rotate, and when the reset driving member 26 rotates, the link limiting member 25 is driven to rotate. In the process of rotating the link limiting piece 25, the driving link assembly 21 is moved from the third position to the first position, so that the resetting of the driving link assembly 21 is realized. After releasing the first reset operation member 261, the first reset elastic member resets the link stopper 25, the reset driving member 26, and the first reset operation member 261.

Further, as shown in fig. 4, 9 and 12, the second link 212 is hinged to the clamp driving assembly 22, the positioning pin driving assembly 23 includes a driving fitting 231 and a positioning pin driving member 232, the driving fitting 231 is hinged to the positioning pin driving member 232, the clamp driving assembly 22 includes a driving sliding slot 221, the driving fitting 231 is provided with a protrusion 2311, the protrusion 2311 is engaged with the driving sliding slot 221 and slidably matched with the driving sliding slot 221, the positioning pin driving assembly 23 and the clamp driving assembly 22 move synchronously by the engagement of the protrusion 2311 and the driving sliding slot 221 during the process that the driving link assembly 21 moves from the first position to the second position, and the positioning pin driving assembly 23 and the clamp driving assembly 22 move relatively by the sliding matching of the protrusion 2311 and the driving sliding slot 221 during the process that the driving link assembly 21 moves from the second position to the third position.

In this embodiment, the groove of the driving sliding groove 221 is L-shaped, that is, it is composed of a horizontal sliding groove and a vertical sliding groove, and one end of the horizontal sliding groove is communicated with one end of the vertical sliding groove, and the protrusion 2311 can slide in the horizontal sliding groove and the vertical sliding groove, or can slide from the horizontal sliding groove to the vertical sliding groove. When the drive link assembly 21 is in the first position, the protrusion 2311 is located in the vertical slide slot. In the process that the driving connecting rod assembly 21 moves from the first position to the second position, the protrusion 2311 slides in the vertical sliding groove, the clamping driving assembly 22 drives the clamping push rod forward under the pushing action of the driving connecting rod assembly 21, and the protrusion 2311 is located in the vertical sliding groove, namely when the clamping driving assembly 22 moves axially, the protrusion 2311 plays a role of axial clamping in the vertical sliding groove, so that the positioning needle driving assembly 23 moves axially towards the near end under the driving of the clamping driving assembly 22, the positioning needle driving assembly 23 drives the positioning needle push rod to move towards the near end, and the positioning needle is driven to be pushed out to achieve positioning. When the drive link assembly 21 is in the second position, the protrusion is located at the intersection of the horizontal sliding groove and the vertical sliding groove, i.e., the protrusion is located in both the horizontal sliding groove and the vertical sliding groove. In the process that the driving link assembly 21 moves from the second position to the third position, the clamping driving assembly 22 further drives the clamping push rod forward under the pushing action of the driving link assembly 21, and since the protrusion is located in the transverse sliding groove, when the clamping driving assembly 22 moves axially, the protrusion slides axially in the transverse sliding groove, that is, the positioning needle driving assembly 23 is not driven to move axially synchronously when the clamping driving assembly 22 moves axially, and in the process, the clamping driving assembly 22 and the positioning needle driving assembly 23 move relatively.

In this embodiment, the first end of the driving fitting 231 is rotatably connected to the housing 3, the second end of the driving fitting 231 is disposed at the top of the positioning needle driving member 232, the protrusion 2311 is disposed at the middle of the driving fitting 231, the driving fitting 231 is integrally sleeved outside the positioning needle driving member 232, the top of the positioning needle driving member 232 is disposed with the force-receiving member 2321, when the driving fitting 231 rotates along with the axial movement of the clamping driving assembly 22, the second end of the driving fitting 231 contacts with the distal end surface of the force-receiving member 2321 and pushes the force-receiving member 2321 to move axially proximally, i.e. the positioning needle driving member 232 moves axially proximally.

Further, drive structure 2 still includes reset assembly 28, and reset assembly 28 includes piece 281 and the handle elastic component 282 that resets, and casing 3 is equipped with the spout that resets, and piece 281 and the spout slip that resets match reset, and piece 281 that resets is connected with pilot pin drive assembly 23, and the one end and the casing 3 fixed connection of handle elastic component 282 that resets, the other end and the drive handle 1 of handle elastic component 282 that resets are connected.

Wherein, the handle return elastic piece is used for returning the handle to the initial position or keeping the handle at the initial position through the elastic force of the handle return elastic piece when no force acts on the handle. The positioning needle driving assembly 23 controls the axial movement of the positioning needle driving assembly 23 through the sliding of the reset piece 281 in the reset chute, so that the reset function and the manual driving function of the positioning needle driving assembly can be realized. After the operator finishes the three steps of the positioning needle driving, the clamping driving and the nail pushing driving of the stitching instrument through the handle, the reset piece 281 is positioned at the near end position of the reset chute, the positioning needle driving assembly synchronously moves to the far end axially along with the reset piece by sliding the reset piece 281 to the far end position of the reset chute, and therefore the reset function of the positioning needle driving assembly is achieved. When the stitching instrument is in an initial state, namely when no operation is executed through the handle, the reset piece can be controlled to slide from the far end of the reset chute to the near end, so that the positioning needle driving assembly axially moves towards the near end, and the manual driving function is realized.

Further, the housing 3 is provided with a guiding sliding groove 32, the positioning pin driving assembly 23 is provided with a first limiting member 233, the first limiting member 233 is slidably matched with the guiding sliding groove 32, and the guiding sliding groove 32 is used for guiding the positioning pin driving assembly 23, so that the moving direction of the positioning pin driving assembly 23 is only axial movement. The direction of movement of the positioning pin driving assembly 23 is only axial movement through the guide chute 32 and the first limiting member 233, and the axial movement length of the positioning pin driving assembly 23 is related to the guide chute 32, specifically, the axial movement length of the positioning pin driving assembly 23 is about the axial length of the guide chute 32, that is, the guide chute 32 plays a role of directional limitation and limitation of the axial movement range.

Further, the clamping driving component 22 is provided with a guiding hole 223, the guiding hole 223 is elongated, the housing 3 is provided with a second limiting member 33, the second limiting member 33 is slidably matched with the guiding hole 223, and the guiding hole 223 is used for guiding the clamping driving component 22 so that the moving direction of the clamping driving component 22 is only axial movement. The guide hole 223 restricts the second stopper 33 to slide only within the range of the guide hole 223, and functions as a directional stopper and a restriction of an axial movement range.

Further, the driving structure further includes a driving link limiting member 34, the driving link limiting member 34 is fixedly connected to the housing 3, and the driving link limiting member 34 limits the driving link assembly 21, so that the driving link assembly can be maintained and limited at the first position when the driving link assembly is reset from the third position to the first position or is in the initial state.

The positioning needle push rod assembly 6 is sleeved outside the clamping push rod assembly 7, the positioning needle push rod assembly 6 is rotatably connected with the positioning needle driving assembly 23, the positioning needle push rod assembly 6 and the positioning needle driving assembly 23 are axially and relatively fixed and rotate relatively, the clamping push rod assembly 7 is rotatably connected with the clamping driving assembly 22, the clamping push rod assembly 7 and the clamping driving assembly 22 are axially and relatively fixed and rotate relatively, the control element 8 drives the clamping push rod assembly 7 to rotate so that the clamping element rotates relatively to the clamping driving assembly 22, and the control element 8 drives the positioning needle push rod assembly 6 to rotate through the clamping push rod assembly 7 so that the positioning needle rotates relatively to the positioning needle driving assembly 23.

Further, the control member 8 includes a first driving portion 81, the clamping push rod 42 is provided with a first sliding slot 422, the first driving portion 81 is axially matched with the first sliding slot 422 in a sliding manner, and the first driving portion 81 drives the clamping push rod assembly 7 to rotate relative to the clamping driving assembly 22 through the first sliding slot 422. The first driving part 81 comprises a driving surface, the first sliding chute 422 comprises a force-bearing surface, the driving surface is in contact matching with the force-bearing surface, and both the driving surface and the force-bearing surface are flat surfaces. When the driving assembly drives the clamping push rod, the first driving part 81 axially slides in the first sliding groove of the clamping push rod; when the operator rotates the control member 8, the first driving portion 81 of the control member 8 contacts with the stress surface of the first sliding groove 422, the first driving portion applies force, the first sliding groove is stressed, and the first driving portion 81 drives the clamping push rod to rotate through the first sliding groove 422.

Further, the clamping push rod 42 is provided with a second sliding groove 423, the positioning needle push rod 61 includes a first limiting portion 611, the first limiting portion 611 is axially matched with the second sliding groove 423 in a sliding manner, and the second sliding groove 423 drives the positioning needle push rod assembly 6 to rotate relative to the positioning needle driving assembly 23 through the first limiting portion 233. When the driving assembly drives the positioning needle push rod, the first limiting part 611 and the second sliding groove 423 slide axially; when the operator rotates the control member 8, the first driving portion 81 drives the clamping push rod to rotate through the first sliding groove 422, the second sliding groove 423 of the clamping push rod applies force, and the first limiting portion 611 is stressed, so that the clamping push rod rotates and simultaneously drives the positioning needle push rod to rotate.

Still include second casing 9, the outside of second casing 9 is equipped with third annular spout 91, and control 8 includes third joint portion 82, third joint portion 82 and third annular spout 91 interference fit. Resistance exists when the control member 8 and the driving device rotate relatively through the interference fit of the third clamping part 82 and the third annular chute 91, when an operator does not apply force to rotate the control member 8, the control member 8 keeps relatively fixed through the interference fit of the third clamping part 82 and the third annular chute 91, and the phenomenon that the proximal end of the suturing device rotates due to loosening of the control member 8 or mistaken contact of the operator when the proximal end of the suturing device does not need to be rotated is avoided.

The embodiment also provides a stitching instrument, which comprises a push rod 41, a clamping push rod 42, a nail pushing push rod 43 and the driving device for the intra-cavity operation stitching instrument, wherein one end of the push rod 41 is rotationally clamped with one end of the positioning needle driving assembly 23, one end of the clamping push rod 42 is rotationally clamped with one end of the clamping driving assembly 22, and one end of the nail pushing push rod 43 is rotationally clamped with one end of the nail pushing driving assembly 24.

The stitching instrument further comprises an end effector 10, a positioning needle push rod assembly 6, a push rod 41, a clamping push rod 42 and a nail pushing push rod 43, wherein the nail pushing push rod 43 is at least partially arranged in the positioning needle push rod assembly 6, the end effector 10 is arranged at one end of the positioning needle push rod assembly 6, a driving handle is arranged at the other end of the positioning needle push rod assembly 6, and the driving handle is controlled by an operator to control the driving assembly 7 to actuate a plurality of actions, so that the end effector 10 is controlled to carry out final stitching operation.

The end effector 10 comprises a positioning needle 51, a cartridge shell 101, staples 102, a staple pushing block 103 and an anvil 104, wherein the upper surface of the cartridge shell 101 is provided with staple ejecting holes 105 for pushing out the staples 102; the staple pushing block 103 is used for pushing the staple 102 to move upwards, so that the staple 102 is pushed out of the staple outlet hole 105 and is bent after encountering the anvil 104, so as to suture the human body. While this embodiment is a stapler without a cutter, in other embodiments it may be provided with a cutter that moves upward with the staple pusher 103 to cut tissue while simultaneously completing the stapling. The staple pusher 43 pushes the staples 102 out of the staple holes by pushing the staples.

The magazine housing 101 is disposed in the magazine accommodating cavity 711 of the clamping push rod 42 and is disposed corresponding to the lower surface of the anvil 104, and the clamping driving assembly 22 pushes the clamping push rod 42 to push the clamping push rod to move towards the anvil 104, so as to clamp the tissue before suturing in advance.

The clamp push rod 42 includes a drive chamber 712 communicating with a cartridge receiving chamber 711. One end of the positioning needle 51 is arranged in the nail bin accommodating cavity 711, the nail bin 71 is provided with a positioning needle hole 1011 for the positioning needle 51 to pass through, the nail bin accommodating cavity 711 is provided with an opening for the nail bin shell 101 to be axially installed along the central shaft of the connecting outer tube 6, and the positioning needle 51 passes through the driving cavity 712 and is connected with the positioning needle driving part. Therefore, the positioning needle 51 and a corresponding transmission mechanism do not need to be arranged in the nail bin 71 in advance as in the prior art, the original mode that the positioning needle of the transverse stitching instrument is arranged in the nail bin 71 in advance is changed, the positioning needle 51 is directly arranged on the transmission mechanism in advance, and the assembly with the positioning needle 51 is realized by changing the installation mode of the nail bin 71, compared with the prior art, the positioning needle 51 in the application is more stable and safer, the assembly is simple, and the alignment of the transmission mechanism is not needed; the structure installation mode of the original transverse suturing device is improved, the assembly is more compact, the radial size of the transverse suturing device is effectively reduced, the transverse suturing device can enter an endoscopic surgery channel with a small inner diameter, and the transverse suturing device can be suitable for intracavity surgery.

According to the embodiment, the beneficial effects of the application are as follows:

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present application. In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

As described above, the present invention has been explained fully in accordance with the gist of the present invention, but the present invention is not limited to the above-described embodiments and implementation methods, and features of the embodiments may be combined with each other without contradiction. A practitioner of the related art can make various changes and implementations within a range allowed by the technical idea of the present invention.

Claims

1. The driving device for the intracavity surgical stapler is characterized by comprising a driving handle (1), a driving structure (2) and a shell (3), wherein the driving structure (2) comprises a driving connecting rod assembly (21), a clamping driving assembly (22), a positioning needle driving assembly (23) and a nail pushing driving assembly (24), the clamping driving assembly (22) is used for driving a clamping push rod (42) to realize clamping, the positioning needle driving assembly (23) is used for driving the push rod (41) to drive a positioning needle (51), the nail pushing driving assembly (24) is used for driving a nail pushing push rod (43) to drive a nail pushing block (52), the clamping push rod assembly (7) and the clamping driving assembly (22) are rotatably connected, the axial direction between the clamping push rod assembly (7) and the clamping driving assembly (22) is relatively fixed and the axial direction between the clamping push rod assembly (7) and the clamping driving assembly (22) is relatively rotated, the positioning needle push rod assembly (6) is sleeved outside the clamping push rod assembly (7), the positioning needle push rod assembly (6) is rotatably connected with the positioning needle driving assembly (23), the positioning needle push rod assembly (6) and the positioning needle driving assembly (23) are axially and relatively fixed and rotate relatively, the clamping push rod (42) is provided with a second sliding groove (423), the positioning needle push rod (61) comprises a first limiting part (611), the first limiting part (611) is axially matched with the second sliding groove (423) in a sliding manner, and the second sliding groove (423) drives the positioning needle push rod assembly (6) to rotate relatively to the positioning needle driving assembly (23) through the first limiting part;

one end of the driving connecting rod assembly (21) is rotatably connected with the shell (3), the other end of the driving connecting rod assembly (21) is rotatably connected with the clamping driving assembly (22), the clamping driving assembly (22) is connected with the positioning needle driving assembly (23) in a matching mode, the driving handle (1) is used for driving the driving connecting rod assembly (21) to move from the first position to the third position so as to enable the positioning needle driving assembly (23) and the clamping driving assembly (22) to axially move, when the driving connecting rod assembly (21) is located at the first position, the driving connecting rod assembly (21) is limited to the nail pushing driving assembly (24), so that the nail pushing driving assembly (24) is not in contact with a nail pushing push rod (43) under the driving of the driving handle (1), and when the driving connecting rod assembly (21) is located at the third position, the nail pushing driving assembly (24) pushes the nail pushing assembly (24) under the driving of the driving handle (1) A nail pushing rod (43).

2. A driving device for an endoluminal surgical stapler according to claim 1, wherein the staple driving assembly (24) comprises a staple driving member (241) and a biasing member (242), the clamping driving assembly (22) is provided with a slide slot (222), the slide slot (222) is slidably matched with the staple driving member (241), the slide slot (222) is used for slidably guiding the staple driving member (241), and the biasing member (242) is used for pushing the staple driving member (241) upwards.

3. A drive arrangement for an endoluminal surgical stapler according to claim 1, wherein said drive linkage assembly (21) comprises a first link (211) and a second link (212), said first link (211) being hingedly connected to said second link (212), one end of said first link (211) being rotatably connected to said housing (3).

4. A drive arrangement for an endoluminal surgical stapler according to claim 3, wherein said second link (212) is hinged to said clamping drive assembly (22), said positioning needle drive assembly (23) comprises a drive fitting (231) and a positioning needle driver (232), said drive fitting (231) is hinged to said positioning needle driver (232), said clamping drive assembly (22) comprises a drive slot (221), said drive fitting (231) is provided with a protrusion (2311), said protrusion (2311) is engaged with said drive slot (221) and slidingly engaged therewith, said positioning needle drive assembly (23) and said clamping drive assembly (22) are synchronously moved by said protrusion (2311) and said drive slot (221) during the movement of said drive link assembly (21) from the first position to the second position, when the driving linkage assembly (21) moves from the second position to the third position, the positioning needle driving assembly (23) and the clamping driving assembly (22) move relatively through the sliding matching of the protrusion (2311) and the driving sliding groove (221).

5. A drive arrangement for an endoluminal surgical stapler according to claim 3, wherein said drive structure (2) further comprises a link stop (25), said link stop (25) being provided with a stop surface (251), said stop surface (251) being adapted to keep said drive link assembly (21) in the third position to avoid loosening of the grip by its resilience after pushing said grip pusher (42).

6. A drive arrangement for an endoluminal surgical stapler according to claim 5, wherein said driving structure (2) comprises a return driving member (26) and a first return elastic member, said return driving member (26) being adapted to drive said link limiting member (25) such that said link limiting member (25) pushes said driving link assembly (21) from the third position to the first position, one end of said first return elastic member being fixedly connected to said housing (3) and the other end of said first return elastic member being connected to said link limiting member (25).

7. A driving device for an endoluminal surgical stapler according to claim 1, wherein said driving structure (2) further comprises a reset assembly (28), said reset assembly (28) comprises a reset member (281) and a handle reset elastic member (282), said housing (3) is provided with a reset chute, said reset member (281) is slidably matched with said reset chute, said reset member (281) is connected with said positioning needle driving assembly (23), one end of said handle reset elastic member (282) is fixedly connected with said housing (3), and the other end of said handle reset elastic member (282) is connected with said driving handle (1).

8. A driving device for an endoluminal surgical stapler according to claim 4, wherein a first end of the driving fitting (231) is rotatably connected to the housing (3), a second end of the driving fitting (231) is disposed on a top of the positioning needle driving member (232) and the driving fitting (231) is sleeved outside the positioning needle driving member (232), the protrusion (2311) is disposed in a middle portion of the driving fitting (231), a force receiving member (2321) is disposed on the top of the positioning needle driving member (232), and when the driving fitting (231) rotates along with the axial movement of the clamping driving assembly (22), the second end of the driving fitting (231) contacts a distal end surface of the force receiving member (2321) and pushes the force receiving member (2321) to move axially toward a proximal end.

9. A driving device for an endoluminal surgical stapler according to claim 1, wherein the clamping driving member (22) is provided with a guiding hole (223), the guiding hole (223) is elongated, the housing (3) is provided with a second stopper (33), the second stopper (33) is slidably matched with the guiding hole (223), the guiding hole (223) is used for guiding the clamping driving member (22) so that the moving direction of the clamping driving member (22) is axial movement only.

10. A stitching instrument for intracavity surgery, which is characterized by comprising a push rod (41), a clamping push rod (42), a nail pushing push rod (43) and the driving device for the intracavity surgery stitching instrument as claimed in any one of claims 1 to 9, wherein one end of the push rod (41) is rotationally clamped with one end of the positioning needle driving component (23), one end of the clamping push rod (42) is rotationally clamped with one end of the clamping driving component (22), and one end of the nail pushing push rod (43) is rotationally clamped with one end of the nail pushing driving component (24).