阅读说明：本技术 作业端可更换式髓核钳 (Nucleus pulposus forceps with replaceable operation end ) 是由 彭页 杜俊杰 张红星 王君 化良平 韩文杰 于 2021-08-12 设计创作，主要内容包括：本申请提供了一种作业端可更换式髓核钳,包括基础手柄和作业模块；作业模块包括握持手柄、功能管、牵引件和夹持组件,握持手柄与功能管可转动地连接,功能管与基础手柄可拆卸地连接；夹持组件与功能管连接,握持手柄通过牵引件与夹持组件传动连接,用于带动夹持组件在闭合状态和张开状态之间切换。仅需要更换作业模块即可适应不同手术场景,成本低。(The application provides nucleus pulposus pincers with replaceable operation ends, which comprise a basic handle and an operation module; the operation module comprises a holding handle, a functional pipe, a traction piece and a clamping assembly, wherein the holding handle is rotatably connected with the functional pipe, and the functional pipe is detachably connected with the basic handle; the clamping assembly is connected with the function pipe, and the holding handle is in transmission connection with the clamping assembly through the traction piece and is used for driving the clamping assembly to be switched between a closed state and an open state. The operation module is only required to be replaced to adapt to different operation scenes, and the cost is low.)

1. A nucleus pulposus forceps with replaceable operation ends is characterized by comprising:

a base handle and an operation module; the operation module comprises a holding handle, a functional pipe, a traction piece and a clamping assembly, the holding handle is rotatably connected with the functional pipe, and the functional pipe is detachably connected with the basic handle; the clamping assembly is connected with the functional pipe, and the holding handle is in transmission connection with the clamping assembly through the traction piece and is used for driving the clamping assembly to be switched between a closed state and an open state.

2. The working end replaceable nucleus pulposus clamp of claim 1, wherein:

the basic handle is provided with a first connecting structure, the functional tube is provided with a second connecting structure, and the first connecting structure is detachably connected with the second connecting structure.

3. The working end replaceable nucleus pulposus clamp of claim 2, wherein:

the first connecting structure and the second connecting structure are mutually matched inverted buckle structures.

4. The working end replaceable nucleus pulposus clamp of claim 2, wherein:

the first connecting structure comprises a mounting seat, a clamping rod and a clamping joint, and the mounting seat is fixedly connected with the base handle; one end of the clamping rod is rotatably connected with the mounting seat, the other end of the clamping rod is fixedly connected with the clamping joint, and the clamping joint is provided with a first clamping inclined plane;

the second connecting structure is arranged as an annular clamping groove, and a second clamping inclined plane is arranged on the groove side wall of the annular clamping groove; the clamping rod is used for driving the clamping head to rotate relative to the mounting seat, so that the clamping head is clamped in the annular clamping groove, and the first clamping inclined plane is abutted to the second clamping inclined plane.

5. The working end replaceable nucleus pulposus clamp of claim 4, wherein:

the basic handle is provided with an assembling surface, a flexible cushion is arranged on the assembling surface, and the flexible cushion is used for elastically abutting against the functional pipe.

6. The working end replaceable nucleus pulposus clamp of claim 4, wherein:

first connection structure is provided with a plurality ofly, and is a plurality of first connection structure is in arrange at the interval in the circumference of basic handle, and is a plurality of first connection structure homoenergetic with the cooperation of second connection structure joint.

7. The working end replaceable nucleus pulposus clamp of claim 6, wherein:

the nucleus pulposus pincers with the replaceable operation ends further comprise driving rings, and the driving rings are sleeved outside the clamping rods; each clamping rod is provided with an avoidance section and a positioning section which are connected, the avoidance section is provided with an avoidance surface, the positioning section is provided with a positioning surface, and the avoidance surface and the positioning surface form an acute angle or an obtuse angle; one end of the avoiding section, which is far away from the positioning section, is rotatably connected with the mounting seat, and the positioning section is fixedly connected with the clamping joint;

when the driving ring slides relative to the clamping rod in the direction from the avoiding surface to the positioning surface, the driving ring can simultaneously drive the clamping rods to rotate along the clamping joints and the clamping direction of the annular clamping grooves.

8. The working end replaceable nucleus pulposus clamp of claim 7, wherein:

each positioning surface is provided with a limiting protrusion, a side face, close to the avoiding surface, of the limiting protrusion is spaced from the edge, connected with the avoiding surface, of the positioning surface, and the limiting protrusion is used for abutting against the driving ring so as to prevent the driving ring from being separated from the positioning surface.

9. The working end replaceable nucleus pulposus clamp of claim 1, wherein:

the centre gripping subassembly includes first arm lock and second arm lock, first arm lock with function pipe fixed connection, the second arm lock with the function pipe is rotationally connected, draw the piece with the second arm lock is connected, is used for driving the second arm lock for first arm lock rotates.

10. The working end replaceable nucleus pulposus clamp of claim 9, wherein:

the second arm lock pass through the axis of rotation with the function pipe is rotationally connected, the cover is equipped with the torsional spring in the axis of rotation, the one end of torsional spring with the function union coupling, the other end of torsional spring with the second arm lock is connected, the torsional spring is used for making the second arm lock has and keeps away from the rotation trend of first arm lock.

Technical Field

The application relates to the field of medical equipment, in particular to nucleus pulposus pincers with replaceable operation ends.

Background

At present, when a protruded nucleus pulposus in an intervertebral disc tissue needs to be removed and other operations in a spinal surgery process, a special surgical instrument is generally used for clamping the removed nucleus pulposus, and then corresponding operations are performed. The prior art is applied to a surgical instrument for clamping nucleus pulposus tissue, the front end of the surgical instrument is provided with two clamping heads, the rear end of the surgical instrument controls the two clamping heads to be opened or closed through a handle, and the surgical instrument has the defects that: different types of clamping surgical instruments need to be replaced under different surgical scenes, and the cost is high.

Disclosure of Invention

The present application provides a nucleus pulposus forceps with a replaceable working end to improve the above technical problems.

The invention is particularly such that:

in view of the above, the present application provides a nucleus pulposus clamp with a replaceable operation end, comprising:

a base handle and an operation module; the operation module comprises a holding handle, a functional pipe, a traction piece and a clamping assembly, the holding handle is rotatably connected with the functional pipe, and the functional pipe is detachably connected with the basic handle; the clamping assembly is connected with the functional pipe, and the holding handle is in transmission connection with the clamping assembly through the traction piece and is used for driving the clamping assembly to be switched between a closed state and an open state.

Optionally, a first connecting structure is arranged on the basic handle, a second connecting structure is arranged on the functional tube, and the first connecting structure is detachably connected with the second connecting structure.

Optionally, the first connecting structure and the second connecting structure are mutually matched inverted buckle structures.

Optionally, the first connecting structure includes a mounting seat, a clamping rod and a clamping head, and the mounting seat is fixedly connected to the base handle; one end of the clamping rod is rotatably connected with the mounting seat, the other end of the clamping rod is fixedly connected with the clamping joint, and the clamping joint is provided with a first clamping inclined plane;

the second connecting structure is arranged as an annular clamping groove, and a second clamping inclined plane is arranged on the groove side wall of the annular clamping groove; the clamping rod is used for driving the clamping head to rotate relative to the mounting seat, so that the clamping head is clamped in the annular clamping groove, and the first clamping inclined plane is abutted to the second clamping inclined plane.

Optionally, the base handle has an assembly surface, and a flexible pad is arranged on the assembly surface and used for elastically abutting against the functional tube.

Optionally, the first connection structure is provided with a plurality of, and is a plurality of first connection structure is in interval arrangement in the circumference of basic handle, and is a plurality of first connection structure homoenergetic with the cooperation of second connection structure joint.

Optionally, the nucleus pulposus pincers with the replaceable operation end further comprise a driving ring, and the driving ring is sleeved outside the clamping rods; each clamping rod is provided with an avoidance section and a positioning section which are connected, the avoidance section is provided with an avoidance surface, the positioning section is provided with a positioning surface, and the avoidance surface and the positioning surface form an acute angle or an obtuse angle; one end of the avoiding section, which is far away from the positioning section, is rotatably connected with the mounting seat, and the positioning section is fixedly connected with the clamping joint;

when the driving ring slides relative to the clamping rod in the direction from the avoiding surface to the positioning surface, the driving ring can simultaneously drive the clamping rods to rotate along the clamping joints and the clamping direction of the annular clamping grooves.

Optionally, each positioning surface is provided with a limiting protrusion, a side surface of the limiting protrusion close to the avoiding surface has a distance with an edge of the positioning surface connected with the avoiding surface, and the limiting protrusion is used for abutting against the driving ring to prevent the driving ring from being separated from the positioning surface.

Optionally, the clamping assembly includes a first clamping arm and a second clamping arm, the first clamping arm is fixedly connected to the functional tube, the second clamping arm is rotatably connected to the functional tube, and the traction member is connected to the second clamping arm for driving the second clamping arm to rotate relative to the first clamping arm.

Optionally, the second arm lock pass through the axis of rotation with the function pipe is rotationally connected, the cover is equipped with the torsional spring in the axis of rotation, the one end of torsional spring with the function union coupling, the other end of torsional spring with the second arm lock is connected, the torsional spring is used for making the second arm lock has and keeps away from the trend of rotation of first arm lock.

The invention has the beneficial effects that:

to sum up, the removable formula nucleus pulposus pincers of operation end that this embodiment provided, basic handle and operation module are detachably connected, can set up the operation module of multiple different model sizes, also the model size of the centre gripping subassembly of a plurality of operation modules is different, so, under corresponding operation scene, can install the operation module that corresponds the model on basic handle, then carry out corresponding operation can, that is, to correspond the function pipe of operation module and be connected with basic handle, then through the cooperation of the grip handle on basic handle and the operation module, supply the operator to grip, the operator makes its rotation for basic handle through applying force in grip handle, and then utilize grip handle to realize opening and closing of centre gripping subassembly through the traction piece, thereby carry out the operation. Under different operation scenes, only the operation module needs to be replaced, the whole clamping device does not need to be replaced, and the cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural view of a state of the working end replaceable nucleus pulposus clamp provided by the present application;

FIG. 2 is a schematic structural view of another state of the working end replaceable nucleus pulposus clamp provided by the application;

FIG. 3 is a schematic view of a portion of a first connection structure provided herein;

fig. 4 is a schematic structural diagram of a connecting head provided in the present application.

Icon:

001-first end; 002-a second end; 100-a base handle; 110-a fixed head; 120-a first grip ring; 130-a first connecting structure; 131-a mounting seat; 132-a click bar; 1321-an avoidance segment; 1301-the first side; 1302-a second side; 1322-a positioning section; 1303-positioning surface; 133-a snap connector; 1331-a first clamping ramp; 1332-a first clamping plane; 134-a limit bump; 200-an operation module; 210-a grip handle; 211-a second connecting structure; 2111-second clamping ramp; 2112-second clamping plane; 220-functional tube; 221-a connector; 222-a protective tube body; 230-a traction member; 240-a clamping assembly; 241-a first clamp arm; 242-a second clamp arm; 300-a drive coil; 400-flexible mat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is conventionally understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated working end replaceable nucleus pulposus clamp or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

At present, press from both sides the ware when using, the chuck that utilizes the handle of rear end to drive the front end opens or closed, because the use scene of pressing from both sides the ware is diversified, need use the chuck of different size of a dimension under the scene of difference, among the prior art, to the operation demand under the different scenes, need prepare the different clamp of a plurality of models and get the ware, change as required and press from both sides the ware. Thus, the cost is high.

In view of this, designers have designed a nucleus pulposus clamp with a replaceable operation end, so that when the nucleus pulposus clamp is used for operations under different scenes, only part of the structure needs to be replaced, the whole nucleus pulposus clamp does not need to be replaced, and the cost is reduced.

Referring to fig. 1-4, in the present embodiment, the operation-end replaceable nucleus pulposus clamp comprises a base handle 100 and an operation module 200; the operation module 200 comprises a holding handle 210, a function pipe 220, a traction piece 230 and a clamping assembly 240, wherein the holding handle 210 is rotatably connected with the function pipe 220, and the function pipe 220 is detachably connected with the basic handle 100; the clamping assembly 240 is connected with the functional tube 220, and the holding handle 210 is in transmission connection with the clamping assembly 240 through the traction piece 230 and is used for driving the clamping assembly 240 to switch between a closed state and an open state.

The nucleus pulposus clamp with the replaceable operation end provided by the embodiment has the advantages that the basic handle 100 and the operation modules 200 are detachably connected, the operation modules 200 with different models and sizes can be arranged, namely the sizes of the clamping components 240 of the operation modules 200 are different, so that the operation modules 200 with the corresponding models can be installed on the basic handle 100 in corresponding operation scenes, and then corresponding operation can be performed, namely the functional tubes 220 corresponding to the operation modules 200 are connected with the basic handle 100 and then are matched with the clamping handles 210 on the operation modules 200 through the basic handle 100 and the clamping handles 210, so that an operator can hold the operation modules, the operator can rotate the operation modules relative to the basic handle 100 through applying force to the clamping handles 210, and further the clamping components 240 can be opened and closed through the traction pieces 230 by utilizing the clamping handles 210, so that the operation can be performed. Under different operation scenes, only the operation module 200 needs to be replaced, the whole clamping device does not need to be replaced, and the cost is reduced.

Referring to fig. 1, in the present embodiment, the base handle 100 optionally includes a fixing head 110, a first grip ring 120 and a first connecting structure 130. The fixed head 110 is a rotator, and the first grip ring 120 is fixed to the proximal end of the fixed head 110. The first connecting structure 130 is connected to the outer circumferential surface of the fixed head 110, and the first connecting structure 130 is detachably connected to the operation module 200.

Referring to fig. 1 and 3, in particular, the first connecting structure 130 includes an installation seat 131, a clamping rod 132 and a clamping head 133, the installation seat 131 is fixed on the fixing head 110, and the clamping rod 132 is rotatably engaged with the installation seat 131 through a rotating shaft. Optionally, the clamping bar 132 includes a bypass segment 1321 and a positioning segment 1322 connected to each other, the bypass segment 1321 has a first side surface 1301 and a second side surface 1302 opposite to each other, the first side surface 1301 of the clamping bar 132 faces the fixing head 110, the second side surface 1302 of the clamping bar 132 is far away from the fixing head 110, both the first side surface 1301 and the second side surface 1302 are flat, and the first side surface 1301 and the second side surface 1302 have an included angle. The first end 001 of the avoiding section 1321 is rotatably connected with the mounting seat 131, the positioning section 1322 is connected with the second end 002 of the avoiding section 1321, and the fixing head 110 is arranged on the avoiding section 1321 and protrudes out of the first side surface 1301. And during the rotation of clamping rod 132 relative to mounting seat 131, first side 1301 has a position parallel to the axis of fixed head 110, while the distance between second side 1302 and first side 1301 increases gradually from first end 001 to second end 002. The positioning segment 1322 has a positioning surface 1303 connected to the second side surface 1302, the second side surface 1302 has an obtuse angle with the positioning surface 1303, and the positioning surface 1303 is disposed parallel to the first side surface 1301. The clamping connector 133 has an inner side surface facing the first end 001, the inner side surface includes a first clamping inclined surface 1331 and a first clamping plane 1332 which are connected, the first clamping inclined surface 1331 and the first side surface 1301 have an obtuse angle, the first clamping plane 1332 is perpendicular to the first side surface 1301, and the first clamping plane 1332 is parallel to the positioning surface 1303.

The second side surface 1302 may also be referred to as an escape surface.

Further, a limiting protrusion 134 is disposed on the positioning surface 1303, and a side surface of the limiting protrusion 134 facing the first end 001 is spaced from an edge of the positioning surface 1303 connected to the first side surface 1301, so as to provide an assembling space for the driving ring 300.

It should be noted that a plurality of first connection structures 130 are disposed on the fixed head 110, and the plurality of first connection structures 130 are uniformly spaced in the circumferential direction of the fixed head 110, for example, in the embodiment, the number of the first connection structures 130 is four, and four first connection structures 130 are uniformly spaced in the circumferential direction of the fixed head 110.

Referring to fig. 1 and 2, further, the nucleus pulposus pincers with the replaceable operation end further comprises a limiting ring, the driving ring 300 is sleeved outside the clamping rods 132, the driving ring 300 can slide relative to the clamping rods 132 along the axial extension direction of the fixing head 110, and the inner peripheral wall of the driving ring 300 is a cylindrical surface coaxial with the fixing head 110. When the driving ring 300 slides relative to the clamping bar 132 in the direction from the first end 001 to the second end 002, the driving ring 300 can simultaneously drive the plurality of clamping bars 132 to rotate towards the direction close to the fixing head 110, so that the plurality of clamping heads 133 can be in clamping fit with the second connecting structure 211 on the functional tube 220. And, when the driving ring 300 is located at the first end 001, the driving ring 300 is spaced apart from the second side 1302, and each clamping rod 132 can rotate relative to the mounting seat 131, so as to release the clamping with the second connecting structure 211.

In this embodiment, optionally, the holding handle 210 includes a second holding ring and a connecting shaft, the connecting shaft is connected to the connector 221, and the second holding ring is rotatably engaged with the connecting shaft.

In this embodiment, optionally, the functional tube 220 includes a connector 221 and a protection tube body 222, the connector 221 and the protection tube body 222 are fixedly connected, and the connector 221 is communicated with the protection tube body 222. The second connecting structure 211 is disposed on the connecting head 221.

Referring to fig. 4, optionally, the second connecting structure 211 is an annular groove disposed on the outer circumferential surface of the connector 221, the annular groove has a first groove wall and a second groove wall that are arranged at an interval in the axial extending direction of the connector 221, and the first groove wall is farther from the protective tube 222 than the second groove wall. The first groove wall comprises a second clamping inclined surface 2111 and a second clamping plane 2112 which are connected, and the second clamping inclined surface 2111 is far away from the groove bottom of the annular clamping groove compared with the second clamping plane 2112. The second clamping inclined surface 2111 and the second clamping plane 2112 form an obtuse angle, and the second clamping plane 2112 is perpendicular to the axis of the connecting head 221.

When the functional tube 220 is connected to the base handle 100, one end of the connecting head 221, which is away from the protective tube 222, needs to be abutted to the distal end of the fixing head 110, it should be understood that in the initial state, the driving ring 300 is disposed close to the mounting seat 131, and at this time, the plurality of clamping rods 132 are all rotated to be in an open state, that is, the avoidance section 1321 of each clamping rod 132 is disposed at an acute angle with the axis of the fixing head 110, and the connecting head 221 is not blocked from being inserted into the region surrounded by the plurality of clamping rods 132, that is, the clamping head 133 of each clamping rod 132 does not block the connecting head 221 from being inserted into the region surrounded by the plurality of clamping heads 133. When the ring-shaped slot substantially corresponds to the position of the clamping head 133, the driving ring 300 is operated to slide from the first end 001 to the second end 002, the driving ring 300 abuts against the second side 1302, and simultaneously drives the plurality of clamping rods 132 to rotate towards the fixing head 110, and along with the increase of the sliding distance of the driving ring 300, the rotating angle of the clamping rods 132 gradually increases, the included angle between the clamping rods 132 and the axis of the fixing head 110 gradually decreases, the first clamping inclined surface 1331 on the clamping head 133 abuts against the second clamping inclined surface 2111 on the connecting head 221, and in the process that the clamping head 133 is clamped into the ring-shaped slot, the connecting head 221 is driven to approach the fixing head 110 along the extending direction of the axis, so that the distal end of the fixing head 110 and the proximal end of the connecting head 221 tightly abut against each other. Finally, the driving ring 300 slides to the positioning surface 1303 and abuts against the limiting protrusion 134, at this time, the clamping head 133 is clamped into the annular clamping groove, the first clamping inclined surface 1331 is attached to the second clamping inclined surface 2111, and the first clamping plane 1332 is attached to the second clamping plane 2112, so that the basic handle 100 and the operation module 200 are assembled. When the operation module 200 needs to be replaced, the driving ring 300 is reset, that is, the driving ring 300 slides away from the positioning surface 1303 to the second side surface 1302, the driving ring 300 loses the limit on the clamping rod 132, the clamping rod 132 can rotate in the direction away from the connecting head 221, and the clamping head 133 can be disengaged from the annular clamping groove, so that the connecting head 221 and the fixing head 110 are separated, and then a new operation module 200 is assembled with the fixing head 110.

It should be understood that the first connecting structure 130 and the second connecting structure 211 may also be other reversed structures that can achieve detachable connection.

Optionally, a plane on which the fixing head 110 is used for being butted with the connector 221 is an assembly plane, the assembly plane is provided with a flexible pad 400, the flexible pad 400 can be bonded and fixed with the assembly plane, and the flexible pad 400 can be abutted against the proximal end face of the connector 221, so that the flexible pad 400 can deform during the assembly process of the fixing head 110 and the connector 221, and the problem of increased assembly difficulty caused by the fact that the sizes of the fixing head 110 and the connector 221 are not matched due to manufacturing errors can be solved. And, through the setting of flexible pad 400, provide elastic force in the junction of fixed head 110 and connector 221, the butt joint fastness of fixed head 110 and connector 221 is better, and the difficult gap that produces in butt joint position department of the two, stability is better, is difficult for rocking.

It should be understood that the flexible pad 400 may be a foam pad or a rubber pad, etc.

Furthermore, in other embodiments, a flexible pad 400 may be disposed on the proximal end face of the connection head 221. It should be understood that the proximal end face of the connection head 221 is the end face that interfaces with the fixed head 110.

Moreover, in other embodiments, a flexible pad 400 may be disposed on the first clamping inclined surface 1331 or the second clamping inclined surface 2111, which may also serve to increase the connection stability between the connection head 221 and the fixing head 110.

In this embodiment, the pulling member 230 is optionally a pulling cable, and the pulling cable may be a metal wire. One end of the cable is connected to the second grip ring and the other end is connected to the clamping assembly 240.

Optionally, the clamping assembly 240 includes a first clamping arm 241 and a second clamping arm 242, the first clamping arm 241 is fixedly connected to the protection tube 222, the second clamping arm 242 is rotatably connected to the protection tube 222, and the pulling member 230 is connected to the second clamping arm 242 for driving the second clamping arm 242 to rotate relative to the first clamping arm 241.

Further, second arm lock 242 rotationally is connected with function pipe 220 through the axis of rotation, and the cover is equipped with the torsional spring in the axis of rotation, and the one end and the protection body 222 of torsional spring are connected, and the other end and the second arm lock 242 of torsional spring are connected, and the torsional spring is used for making second arm lock 242 have the rotation trend of keeping away from first arm lock 241. In other words, in the initial state, the first clamping arm 241 and the second clamping arm 242 are in the open state, and when tissue needs to be clamped, the first holding ring 120 and the second holding ring are held, after a force is applied, the second holding ring is close to the first holding ring 120 to rotate, the cable drives the second clamping arm 242 to rotate relative to the rotating shaft, and the second clamping arm 242 overcomes the elastic force of the torsion spring and is closed with the first clamping arm 241. When the first grip ring 120 and the second grip ring are released, the external force applied to the second grip ring is removed, the second clamping arm 242 rotates away from the first clamping arm 241 and resets under the action of the torsion spring, and the first clamping arm 241 and the second clamping arm 242 are opened.

In other embodiments, the first and second clamp arms 241 and 242 may be rotated simultaneously to perform an opening or closing motion.

The removable formula nucleus pulposus pincers of operation end that this embodiment provided, basic handle 100 and operation module 200 are detachably connected, can set up the operation module 200 of multiple different model sizes, and the model size that also is the centre gripping subassembly 240 of a plurality of operation modules 200 is different, so, under corresponding operation scene, can install the operation module 200 that corresponds the model on basic handle 100, then carry out corresponding operation can. Low cost, more smooth operation, time and labor saving and high operation efficiency.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.