CN111658058B

CN111658058B - Clip device for use with endoscope and clip portion thereof

Info

Publication number: CN111658058B
Application number: CN202010609679.XA
Authority: CN
Inventors: 胡晓刚; 韩贯通; 高嵩
Original assignee: Anrei Medical HZ Co Ltd
Current assignee: Anrei Medical HZ Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2022-09-13
Anticipated expiration: 2040-06-29
Also published as: CN111658058A

Abstract

The invention provides a clamp device used in cooperation with an endoscope and a clamping part thereof, wherein the clamping part comprises clamping pieces and a clamp pipe, the tails of the two clamping pieces are accommodated in the clamp pipe, the tails of the clamping pieces are movably connected with the front end of a push-pull seat, the clamp pipe is provided with a stop part for clamping a first convex part at the tail of the clamping piece, the rear end of the clamp pipe is detachably connected with a shackle, the shackle is provided with at least two elastic shackle claws, the rear end of the clamp pipe is provided with a first limiting part corresponding to the shackle claws, and the clamp pipe is connected with the shackle through the shackle claws and the first limiting part; the hook ring has a shielding part for shielding the stop part. The invention can prevent the tail part of the clamping piece from being clamped on the clamp pipe in the process of repeatedly opening, closing and adjusting the clamping piece.

Description

Clip device for use with endoscope and clip portion thereof

Technical Field

The present invention relates to a clip device used in conjunction with an endoscope and a clip portion thereof, and more particularly, to a clip device used for hemostasis in suturing an operation wound under an endoscope or for preventing delayed hemostasis, for temporarily clipping a tissue to fix another instrument, or for use in applications such as position marking.

Background

In the prior art, the following clamping devices or hemostats are used to clamp tissue to achieve the purposes of closing a wound, stopping bleeding or preventing delayed bleeding:

in the patent document with the patent application number of CN201310272522.2 published in china, a hemostatic clamp is disclosed, which adopts a release mode of breaking a connecting piece and a fixing mode of fixing a push-pull seat and a clamping piece by an elastic spring leaf on the wall of a clamp tube, and the fixing mode of releasing the clamping piece of the hemostatic clamp is exposed, so that the hemostatic clamp has a risk of loosening and the clamping piece releasing process is troublesome.

In the patent document with the patent application number of CN201220250652.7 published in China, an elastic claw is arranged in a separating ring with a movable opening ring in series, the separating ring is straightened to achieve the purpose of releasing when the separating ring is released, the flange of the elastic claw is clamped into a hemostatic clamp in a fixing mode of a concave ring of a containing pipe, the force of the instrument for opening the separating ring is mutually perpendicular to the force borne by the separating ring, so that the separating ring and the clamping piece are difficult to loosen, and the containing pipe and a handle are released in a mode of extruding and opening the claw, and the structure is complex and the operation is laborious.

In the patent document with the patent application number of CN201410222753.7 published in china, a hemostatic clamp is disclosed, in which a sliding groove is provided in the middle of a clamping arm, and a bending structure at the end of the sliding groove is locked by opening and closing a clamp body through reciprocating motion along the sliding groove. The clamping arm of the instrument is provided with a groove, so that the processing difficulty and cost are increased, and the special shape of the clamping arm ensures that the clamping arm has smaller elasticity and is not firm to clamp; in addition, the deformation of the steel wire buckle of the device enables the steel wire buckle to be loosened from the clamping arm, and the steel wire buckle has an opening gap, so that accidental loosening can be generated when the clamp body is pushed repeatedly, and the use stability is affected.

In U.S. published patent application No. US8062311B2, a hemostatic clamp is disclosed that requires a yoke to restrain the advance and stop of the clip, and that retains the yoke in the patient, and that has barbed holes in the clamp tube, which is also inconvenient to use.

As can be seen from the above, in the release of the conventional clip device, the separation of the clamping portion and the release portion is realized by the fracture mode of the connecting member or the connecting sheet or other structural parts, so that there are fracture residues or fragments splashing, or there are many parts and the structure is relatively complex, and various functions are dispersed in different parts, which results in poor process reliability, more parts remaining in the patient, and a relatively long total length after clipping. Therefore, the patent document with publication number CN108013914A discloses an improved hemostatic clamp used under an endoscope, the clamp part of which comprises clamping pieces, a clamp tube, a stop pin, a connecting pin, a push-pull seat and a connecting tube for connecting a mandrel, wherein the push-pull seat is arranged in the clamp tube and can move back and forth, the connecting tube is fixed at the rear end of the push-pull seat, the clamping pieces are elastic metal sheets, the tails of the clamping pieces are provided with open holes, the connecting pin penetrates through the holes of the two clamping pieces and is fixed with the front end of the push-pull seat, and one side of the hole at the tail of the clamping piece is provided with a first protruding part which is turned over outwards; the tail part of the inner wall of the clamp pipe is provided with a circle of stopping parts, when the two clamping pieces are clamped tightly, the protruding parts at the tail parts of the clamping pieces are clamped on the stopping parts, and the stop pin is fixed at the front part of the clamp pipe so as to limit the push-pull seat to slide out of the clamp pipe. In this structure, have the strengthening rib on the clamping piece, clamping-force is big, and the release does not have fracture piece, can realize reducing the characteristics of keeping the section length when bigger opening. However, the inventor believes that the structure has more parts, complex assembly structure, more process steps, unreliable movable positioning between the clamping piece and the push-pull seat, inconvenient and reliable operation, and further improvement and reduction of manufacturing cost are still needed. Chinese patent document No. CN110464410A is an improvement based on the former patent, and discloses a clip device and a clamping portion thereof for cooperating with an endoscope, wherein a connecting portion is disposed at the front end of a push-pull seat, the front portion of the connecting portion protrudes towards the left and right sides to form radial pin portions, the tails of two clips are respectively sleeved on the two radial pin portions through holes to realize the movable connection between the clips and the push-pull seat.

Disclosure of Invention

In order to solve the above-described problems, a first object of the present invention is to provide a clamping portion of a clip device for use with an endoscope, which can prevent a clip from being caught on a clip tube in a process of repeatedly opening and closing the clip.

A second object of the present invention is to provide a clip device for use with an endoscope, which has the above-described clip portion and is structurally stable.

Based on the above purpose, one aspect of the present invention provides a clamping portion of a clip device for use with an endoscope, including two clip pieces and a clamp tube, wherein the clip pieces are elastic metal pieces, the tails of the two clip pieces are accommodated in the clamp tube, the tails of the clip pieces are provided with an open hole and a first protruding portion protruding outward, the tails of the clip pieces are movably connected with the front end of a push-pull seat through the hole, the rear end of the push-pull seat is connected with a mandrel, the push-pull seat is arranged in the clamp tube and can move back and forth, the clamp tube is provided with a stop portion for clamping the first protruding portion at the tails of the clip pieces, the rear portion of the clamp tube is connected with a detachable shackle, the shackle is sleeved on the mandrel or the push-pull seat, and the outer diameter of the push-pull seat is larger than the central hole of the shackle so as to drive the shackle to move backward; the hook ring is provided with at least two elastic hook ring claws, a first limiting part corresponding to the hook ring claws is formed at the rear end of the clamp pipe, and the clamp pipe is connected with the hook ring through the hook ring claws and the first limiting part; the hook ring is provided with a shielding part, and when the clamp pipe is connected with the hook ring, the shielding part of the hook ring is inserted into the clamp pipe and shields the stopping part so as to prevent the first protruding part of the clamping piece from being clamped on the stopping part.

Preferably, the stopping part is a stopping step or a window hole arranged on the inner wall of the middle rear part of the clamp pipe; when the clamp pipe is connected with the shackle, the shielding part of the shackle shields the window hole or the stop step in the clamp pipe.

Preferably, the first limiting part is a through hole or a sunken circumferential groove arranged at the rear end of the clamp pipe; when the clamp pipe is connected with the shackle, the shackle claw penetrates into the through hole or is embedded in the circumferential groove.

Preferably, the front end of the push-pull seat is provided with a connecting part, the front part of the connecting part protrudes towards the left side and the right side respectively to form radial pins, and the tail parts of the two clamping pieces are sleeved on the two radial pins through holes respectively, so that the clamping pieces are movably connected with the push-pull seat.

Preferably, a second lug boss is formed at the outer end of the radial pin, and the second lug boss, the pin body of the radial pin and the connecting part together enclose a limiting groove for connecting the clamping piece. Therefore, the two side edges of the tail hole of the clamping piece are respectively clamped into the limiting groove, so that the clamping piece is prevented from being separated from the push-pull seat in the process of repeated opening and closing.

Preferably, the outer end of the radial pin extends to both sides to form the second protruding portion, so that the second protruding portion and the radial pin form a T-shaped structure, and the T-shaped structure and the connecting portion enclose the limiting groove.

Preferably, the outer end of the radial pin extends in the radial direction to form a second boss, and the transverse dimension of the second boss is larger than the radial dimension of the hole, so that the second boss, the radial pin and the connecting part together form a limiting groove, and thus, when the radial pin is connected in the hole at the tail part of the clamping piece in a penetrating manner, the side edge of the hole is clamped in the limiting groove.

Preferably, the cross-sectional shape of the radial pin is non-circular, and the hole at the tail of the clamping piece has a shape matched with the radial pin, so that the rotation range of the tail of the clamping piece relative to the push-pull seat is limited.

Preferably, the side of the second bulge part close to the radial pin becomes gradually thinner from back to front into a gradual slope, so that the difficulty of assembling or disassembling between the radial pin and the hole is reduced.

Preferably, the shielding part of the shackle is cylindrical, and the shackle claw is arranged on the side wall of the cylindrical shielding part; two windows are oppositely arranged on the side wall of the cylindrical shielding part, the shackle claws are arranged in the windows, and the rear ends of the shackles extend into the rotating ring seat and are limited.

In another aspect of the present invention, there is provided a clip device for use with an endoscope, the clip device including an operating portion, a releasing portion, and a gripping portion as described above.

Compared with the prior art, the invention has the beneficial effects that:

1. under the condition that the hook ring is connected with the clamp pipe, the hook ring always shields the stop part of the clamp pipe, so that even if the tail part of the clamping piece is bounced open in the opening and closing process of the clamping piece, the tail part of the clamping piece cannot be clamped on the stop part, the clamping piece in the scheme of the invention can be repeatedly opened and closed, and meanwhile, as the hook ring shields the stop part, the clamping piece can be opened again under the condition that the radial direction in the clamp pipe is not restrained;

2. the outer end parts of the radial pins extend towards two sides to form second protruding parts, and the left end and the right end of each second protruding part are respectively positioned on two sides of the hole, so that the second protruding parts can prevent the tail parts of the clamping pieces from bouncing off in the opening and closing or rotating process of the clamping pieces, the clamping pieces can be opened and closed repeatedly and cannot be clamped on the clamp pipe, and the structural stability is good;

3. the tail of the clamping piece is symmetrically flicked in the separation process, no part is broken, no fragments are left, and the stability of the symmetrically-protruding barbs at the tail of the clamping piece is higher.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic view of a clip according to an embodiment of the present invention;

FIG. 3 is a first schematic view of the present embodiment of the invention showing the appearance of the clip assembly after it has been clipped;

FIG. 4 is a second external view of the clip assembly shown in FIG. 4 after it has been clipped;

FIG. 5 is a schematic view of the clamping device of an embodiment of the present invention shown separated after clamping;

FIG. 6 is a schematic cross-sectional view of a shackle of an embodiment of the present invention;

FIG. 7 is a first cross-sectional view of a clamp tube according to an embodiment of the present invention;

FIG. 8 is a schematic view of a clamp tube and its cross-sectional structure of an embodiment of the present invention;

FIG. 9 is a third schematic cross-sectional view of a clamp tube according to an embodiment of the present invention;

FIG. 10 is a first schematic structural diagram of a push-pull seat according to an embodiment of the present invention;

FIG. 11 is a first schematic structural diagram of a push-pull seat according to an embodiment of the present invention;

FIG. 12 is a side view of the structure shown in FIG. 11;

FIG. 13 is a second schematic structural view of the push-pull seat according to the embodiment of the present invention;

fig. 14 is a side view of the structure shown in fig. 13.

Wherein, 1, a clamping piece; 2. clamping the pipe; 3. a push-pull seat; 4. a shackle; 5. a swivel seat; 6. a mandrel; 7. a spring hose; 8. a rotating wheel; 9. pushing the tube; 10. a sliding handle; 11. a handle;

110. a claw end; 120. a forearm; 121. a shoulder portion; 130. a rear arm; 131. an arch-shaped connecting part; 140. a tail portion; 141. an aperture; 142. a first projecting portion;

210. perforating the hole; 211. a circumferential groove; 220. stopping the step; 221. a viewing aperture; 230. a baffle section;

300. a connecting portion; 310. a radial pin; 311. a second projection; 320. a limiting groove; 330. a protective wing section;

410. and hook and loop claws.

Detailed Description

The invention is further described with reference to the following figures and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Further, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example one

As shown in FIG. 1, a clamping part of a clip device used with an endoscope comprises a clip 1 and a clamp tube 2, wherein the clip 1 is an elastic metal sheet, the tail parts 140 of the two clips 1 are accommodated in the clamp tube 2 (as shown in FIGS. 3 and 4), as shown in fig. 2, the tail part 140 of the clip 1 is provided with an open hole 141 and a first protrusion 142 protruding outwards, the tail part 140 of the clip 1 is movably connected with the front end of the push-pull seat 3 through the hole 141, the rear end of the push-pull seat 3 is connected with the mandrel 6, the push-pull seat 3 is arranged in the clamping tube 2 and can move back and forth, as shown in fig. 5, the clamp tube 2 is provided with a stop portion for clamping the first protrusion 142 of the tail 140 of the clip 1, the rear portion of the clamp tube 2 is connected with a detachable hook ring 4, the hook ring 4 is sleeved on the mandrel 6 or the push-pull seat 3, and the outer diameter of the push-pull seat 3 is larger than the central hole of the hook ring 4 so as to drive the hook ring 4 to move backwards; the clamp is characterized in that at least two elastic hook-and-loop claws 410 are arranged on the shackle 4, a first limiting part corresponding to the hook-and-loop claws 410 is formed at the rear end of the clamp pipe 2, and the clamp pipe 2 is connected with the shackle 4 through the hook-and-loop claws 410 and the first limiting part; as shown in fig. 6, the hook ring 4 has a shielding portion, and when the clamping tube 2 is connected to the hook ring 4, the shielding portion of the hook ring 4 is inserted into the clamping tube 2 and shields the stop portion, so as to prevent the first protrusion 142 of the clip 1 from being caught on the stop portion.

As another embodiment, the shielding part of the shackle 4 has a cylindrical shape, and the shackle claws 410 are provided on the side wall of the cylindrical shielding part; two windows are oppositely arranged on the side wall of the cylindrical shielding part, and the hook ring claw 410 is arranged in each window. In this embodiment, the shackle 4 has a plurality of annular portions with different outer diameters, wherein a thin annular portion with a smaller outer diameter is a shielding portion, and two or more shackle claws 410 having elasticity are formed on the side of the thin annular portion.

In another embodiment, the stopping portion is disposed at the middle rear portion of the clamping tube 2, and when the clamping tube 2 is connected to the hook ring 4, the front end of the hook ring 4 can cover the stopping portion, so as to prevent the first protrusion 142 of the clip 1 from being caught on the stopping portion during the process of repeatedly opening and closing the clip 1.

As a preferred embodiment, as shown in fig. 7, the stopping portion is a stopping step 220 provided inside the middle rear portion of the clamp tube 2, or, preferably, the stopping portion may be two or more viewing windows 221 symmetrically provided in the middle rear portion of the clamp tube 2 as shown in fig. 8; when the clamp tube 2 is connected to the hook ring 4, the front end of the hook ring 4 covers the window hole 221 or the stop step 220 in the clamp tube 2.

As shown in fig. 2, the clip 1 includes a front arm 120 and a rear arm 130, the front arm 120 is provided with a claw end 110 at the end, shoulders 121 are provided on two wings of the front arm 120, the claw end 110 is serrated, and the claw ends 110 are engaged with each other when the two clips 1 are clamped, the front arm 120 and the rear arm 130 of the clip 1 are connected by an arched connecting portion 300131, the rear arm 130 is provided with a tail portion 140 of the clip 1 at the end, the hole 141 of the tail portion 140 of the clip 1 is preferably a "C" shaped opening, and the opening direction is towards the rear end; the rear arms 130 of the clamping pieces 1 can be accommodated in the clamping tube 2, the front part of the clamping tube 2 is provided with a blocking piece part 230 for limiting the push-pull seat 3 to slide out of the clamping tube 2, and the blocking piece part 230 is positioned between the two clamping pieces 1 and is formed by bending a part of wall extending out from the front end of the clamping tube 2. Thus, the welding process can be saved, and the manufacturing cost can be reduced.

As a preferred embodiment of the first stopper portion, as shown in fig. 7 and 9, the rear end of the clamp tube 2 is formed with a through hole 210 corresponding to the hook and loop claw 410, or in another preferred embodiment, as shown in fig. 8, the first stopper portion may be: the rear end of the clamp pipe 2 is inwards sunken to form a circumferential groove 211 corresponding to the shackle claw 410; the back end of the clamp pipe 2 is connected with the shackle 4 by a shackle claw 410 penetrating into the penetrating hole 210 or being embedded in the circumferential groove 211.

As a preferred embodiment, as shown in fig. 10, the front end of the push-pull seat 3 is provided with a connecting portion 300, the front portion of the connecting portion 300 is formed with radial pins 310 protruding towards the left and right sides, respectively, and the tail portions 140 of the two clamping pieces 1 are respectively sleeved on the two radial pins 310 through holes 141 so as to realize the movable connection between the clamping pieces 1 and the push-pull seat 3.

As a preferred embodiment, the outer end of the radial pin 310 extends laterally to form a second protrusion, and the second protrusion, the pin body of the radial pin 310 and the connecting portion 300 together form a limiting groove 320, so that the two sides of the hole 141 at the tail portion 140 of the clip 1 are respectively clamped in the limiting groove 320, thereby preventing the clip 1 from separating from the push-pull seat 3 in the process of repeated opening and closing. Preferably, as shown in fig. 10, the radius of curvature of the front end of the radial pin 310 is greater than that of the rear end thereof, so as to reduce the difficulty of assembling or disassembling the radial pin 310 with the hole 141.

As a preferred embodiment, the outer end of the radial pin 310 extends sideways in a straight line to form the second protrusion, so that the second protrusion and the radial pin 310 form a T-shaped structure as shown in fig. 11 and 12, and the T-shaped structure and the connecting portion 300 enclose the limiting groove 320.

As shown in fig. 13 and 14, the outer end of the radial pin 310 extends in the radial direction to form a second protruding portion, and the lateral dimension of the second protruding portion is larger than the radial dimension of the hole 141, so that the second protruding portion, the radial pin 310 and the connecting portion 300 together form a limiting groove 320, and thus, when the radial pin 310 is inserted into the hole 141, the side edge of the hole 141 is caught in the limiting groove 320.

As a preferred embodiment, the cross-sectional shape of the radial pin 310 is non-circular, and the hole 141 of the tail 140 of the clip 1 has a shape matching with the radial pin 310, so as to limit the rotation range of the tail 140 of the clip 1 relative to the push-pull seat 3;

as a preferred embodiment, the side of the second protruding portion close to the radial pin 310 is gradually tapered from back to front to form a gradual slope, so as to reduce the difficulty of assembling or disassembling the radial pin 310 and the hole 141.

Preferably, the push-pull seat 3 is made of casting, but can be made by other machining methods. The cross-sectional shape of the radial pin 310 may be circular, oval, square, rectangular, polygonal or other shapes, etc., but is preferably non-circular to achieve the function of limiting the rotation of the clip 1. In other embodiments, the outer diameter of the radial pin 310 in the front-back direction (matching with the opening distance of the hole 141 of the tail part 140 of the clip 1) is significantly smaller than the outer diameter in other directions, so that when the clip 1 is installed, the hole 141 of the tail part 140 of the clip 1 can be inserted into the radial pin 310 in a direction perpendicular to the front-back direction and then rotated by 90 °, such that the claw end 110 of the clip 1 faces forward and the hole 141 of the tail part 140 of the clip 1 is in snap-fit connection with the radial pin 310, thereby facilitating the installation and manufacture. The clamp pipe 2 and the clip 1 are made of metal blanking parts, the blocking part 230 on the clamp pipe 2 is formed by later-stage bending, and the first protruding part 142 on the clip 1 can be formed together with the clip 1 or formed by later-stage bending. Preferably, the tail part 140 of the clip 1 is provided with two first protrusions 142 protruding outwards, and when the tail part 140 of the clip 1 is received in the gap, the two first protrusions 142 are respectively located at two sides of the protection wing 330 so as to limit the rotation range of the tail part 140 of the clip 1 relative to the push-pull seat 3. Like this, realized the three-dimensional location of clamping piece 1 and push-and-pull seat 3, simple structure is reliable, makes things convenient for the operation to when two clamping pieces 1 press from both sides tightly, every clamping piece 1 all through two first bulge 142 joints on the position stopping portion of the afterbody inner wall of clamp pipe 2, make to press from both sides tightly more reliable and stable.

The present embodiment also provides a clip device for use with an endoscope, the clip device including an operating portion, a releasing portion, and a gripping portion as described above;

the far end of a mandrel 6 in the operation part is fixedly connected with a connecting pipe in the clamping part, a spring hose 7 in the release part is sleeved on the mandrel 6, the near end of the spring hose 7 is connected with the operation part, a swivel seat 5 in the release part is fixed at the far end of the spring hose 7, a shackle 4 is mounted on the swivel seat 5, and the shackle 4 is detachably connected with the clamp pipe 2; the operation part pulls the mandrel 6 to drive the push-pull seat 3 to move backwards so as to clamp the clamping piece 1, the clamping piece 1 is limited by the clamp tube 2, the mandrel 6 is continuously pulled, the radial pin 310 on the push-pull seat 3 enables the hole 141 of the tail part 140 of the clamping piece 1 to deform and separate, the tail part 140 of the clamping piece 1 is elastically opened, and the first bulge part 142 of the tail part 140 of the clamping piece 1 is buckled on the stop part of the clamp tube 2;

the operating part comprises a mandrel 6, a rotating wheel 8, a push pipe 9, a sliding handle 10 and a handle 11, the sliding handle 10 can slide on the handle 11, the sliding handle 10 is connected with the near end of the mandrel 6 through the push pipe 9, the rotating wheel 8 is sleeved on the mandrel 6 and can drive the mandrel 6 to rotate, the mandrel 6 can move back and forth in a flat hole of the rotating wheel 8, and the near end of a spring hose 7 in the releasing part is fixedly connected with the handle 11;

the release part comprises a rotating ring seat 5 and a spring hose 7, a shackle 4 is arranged on the rotating ring seat 5 through a limiting step, the rear end of the clamp pipe 2 and the shackle 4 are connected by penetrating a shackle claw 410 into the through hole 210 or embedding the shackle claw in the circumferential groove 211, and the mandrel 6 drives the connecting pipe or the push-pull seat 3 to be separated from the shackle claw 410 on the shackle 4 so as to separate the clamp pipe 2 from the shackle 4; the shaft part of the shackle 4 is provided with a middle hole, the diameter of the middle hole is larger than the outer diameter of the mandrel 6, and the diameter of the middle hole is smaller than the outer diameter of the connecting pipe or the maximum outer diameter of the push-pull seat 3.

When in use, the sliding handle 10 slides in the sliding groove of the handle 11, and the forward movement can push the mandrel 6 to drive the push-pull seat 3 to move forward, so that the clamping piece 1 extends out of the clamping tube 2, and the purpose of opening the clamping piece 1 is achieved, as shown in fig. 1; the core shaft 6 can be pulled to drive the push-pull seat 3 to move backwards, so that the clamping pieces 1 are contracted into the clamping tube 2 to achieve the purpose of closing and clamping the clamping pieces 1, the sliding handle 10 continuously moves backwards, the core shaft 6 is pulled to drive the push-pull seat 3 to move backwards, the radial pins 310 on the push-pull seat 3 enable the holes 141 of the tail portions 140 of the clamping pieces 1 to deform and separate, the tail portions 140 of the two clamping pieces 1 and the push-pull seat 3 are separated and then elastically separated, the first protruding portions 142 of the tail portions 140 of the clamping pieces 1 are buckled on the stopping steps of the clamping tube 2, the core shaft 6 continuously moves backwards, the push-pull seat 3 is provided with elastic hooks, so that the clamping tube 2 is separated from the rotating ring, the clamp is released as shown in fig. 5, no part fracture occurs from beginning to end, and no fragment residue exists.

Based on the above, the present embodiment has the following advantages:

2. the outer end part of the radial pin forms a second projecting part, and the left end and the right end of the second projecting part are respectively positioned at two sides of the hole, so that the second projecting part can prevent the tail part of the clamping piece from bouncing off in the opening and closing or rotating process of the clamping piece, the clamping piece can be opened and closed repeatedly and cannot be clamped on the clamping pipe, and the structural stability is good;

3. the clamping piece tails are symmetrically flicked in the separation process, no part is broken, no fragments are left, and the barb stability of the symmetrical protrusions at the clamping piece tails is higher.

Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. A clamping part of a clamp device used in cooperation with an endoscope comprises clamping pieces (1) and a clamp tube (2), wherein the clamping pieces (1) are elastic metal sheets, tail parts (140) of the two clamping pieces (1) are contained in the clamp tube (2), the tail parts (140) of the clamping pieces (1) are provided with an open hole (141) and a first protruding part (142) protruding outwards, the tail parts (140) of the clamping pieces (1) are movably connected with the front end of a push-pull seat (3) through the hole (141), the rear end of the push-pull seat (3) is connected with a mandrel (6), the push-pull seat (3) is arranged in the clamp tube (2) and can move back and forth, a stop part used for clamping the first protruding part (142) of the tail parts (140) of the clamping pieces (1) is arranged on the clamp tube (2), the rear part of the clamp tube (2) is connected with a detachable hook ring (4), and the hook ring (4) is sleeved on the mandrel (6) or the push-pull seat (3), the outer diameter of the push-pull seat (3) is larger than the central hole of the hook ring (4) so as to drive the hook ring (4) to move backwards; the clamp is characterized in that at least two elastic hook-and-loop claws (410) are arranged on the hook ring (4), a first limiting part corresponding to the hook-and-loop claws (410) is formed at the rear end of the clamp pipe (2), and the clamp pipe (2) is connected with the hook ring (4) through the hook-and-loop claws (410) and the first limiting part; the clamp is characterized in that the hook ring (4) is provided with a shielding part, when the clamp pipe (2) is connected with the hook ring (4), the shielding part of the hook ring (4) is inserted into the clamp pipe (2) and shields the stopping part so as to avoid the first convex part (142) of the clamp piece (1) from being clamped on the stopping part.

2. The clamping portion of a clip device for use with an endoscope as defined in claim 1 wherein said stop portion is a stop step (220) or a window hole (221) provided on the inner wall of the middle rear portion of the clip tube (2); when the clamp pipe (2) is connected with the hook ring (4), the shielding part of the hook ring (4) shields the window hole (221) or the stopping step (220) in the clamp pipe (2).

3. The clamping portion of a clip device for use with an endoscope according to claim 1, wherein said first retention portion is a piercing hole (210) or a recessed circumferential groove (211) provided at the rear end of the clip tube (2); when the clamp pipe (2) is connected with a shackle (4), a shackle claw (410) penetrates into the through hole (210) or is embedded in the circumferential groove (211).

4. The clamping portion of a clip device used with an endoscope according to claim 1, wherein the front end of the push-pull seat (3) is provided with a connecting portion (300), the front portion of the connecting portion (300) is formed with radial pins (310) protruding towards the left and right sides, and the tail portions (140) of the two clamping pieces (1) are respectively sleeved on the two radial pins (310) through holes (141) so as to realize the movable connection between the clamping pieces (1) and the push-pull seat (3).

5. A clamping part of a clip device for use with an endoscope according to claim 4, characterized in that the outer end of the radial pin (310) is formed with a second projection which, together with the pin body of the radial pin (310) and the connecting part (300), encloses a limiting groove (320) for the connection of the clamping lamella (1).

6. A clamping part of a clip device for use with an endoscope according to claim 5, characterized in that the outer end of the radial pin (310) extends to both sides to form the second protrusion, so that the second protrusion and the radial pin (310) form a T-shaped structure, and the T-shaped structure and the connecting part (300) enclose the limiting groove (320).

7. A clamping part of a clip device for use with an endoscope according to claim 5, characterized in that the outer end of the radial pin (310) extends radially to form the second projection, and the lateral dimension of the second projection is larger than the radial dimension of the hole (141), so that the second projection, the radial pin (310) and the connecting part (300) together enclose a limiting groove (320), so that the side of the hole (141) is caught in the limiting groove (320) when the radial pin (310) is threaded into the hole (141) of the tail part (140) of the clip (1).

8. The clamping portion of a clip device for use with an endoscope according to claim 4, wherein the radial pin (310) has a non-circular cross-sectional shape and the hole (141) of the tail portion (140) of the clip (1) has a shape matching the radial pin (310) so as to limit the range of rotation of the tail portion (140) of the clip (1) relative to the push-pull socket (3).

9. The clip portion of a clip device for use with an endoscope according to claim 1, wherein the shielding portion of said hook ring (4) is cylindrical, and said hook ring claw (410) is provided on a side wall of the cylindrical shielding portion; two windows are oppositely arranged on the side wall of the cylindrical shielding part, and the hook ring claw (410) is arranged in each window; the rear end of the shackle (4) extends into the rotary ring seat (5) and is limited.

10. A clip device for use with an endoscope, comprising an operating portion, a releasing portion, and a holding portion as claimed in any one of claims 1 to 9.