WO2024087583A1

WO2024087583A1 - Endoscopic hemostatic clip device

Info

Publication number: WO2024087583A1
Application number: PCT/CN2023/093843
Authority: WO
Inventors: 金富康; 柴玉军; 杨素攀
Original assignee: 苏州法兰克曼医疗器械有限公司
Priority date: 2022-10-24
Filing date: 2023-05-12
Publication date: 2024-05-02
Also published as: CN115444492A

Abstract

An endoscope hemostatic clip device, comprising a clip head component, a delivery component and a manipulation component. The clip head component comprises clip pieces (1) and a clip base (9). Each clip piece (1) is provided with a first fitting member (15), the clip base (9) is provided with first fitting portions (92), and the first fitting members and the first fitting portions fit with each other to maintain the clip pieces (1) in a closed state. The delivery component comprises a linkage component, a connecting member (4) and an outer catheter component. The connecting member (4) is provided with second fitting members (44), and the clip base (9) is provided with second fitting portions (93). The linkage component is provided with a third fitting member (31), and the connecting member (4) is provided with a third fitting portion (41). The manipulation component comprises a handle (10), a first operating member (11) and a second operating member (12).

Description

Endoscopic hemostatic clipping device

Technical Field

The invention relates to a medical device, in particular to an endoscopic hemostatic clipping device.

Background technique

The hemostatic clip is a minimally invasive surgical instrument, commonly used for wound suturing and hemostasis in patients, such as hemostasis in the upper and lower digestive tract. The hemostatic clip can be inserted into the surgical site in the patient's body through the clamp insertion hole of the medical endoscope, and the clamping operation is performed outside the body to complete operations such as reducing the wound surface and hemostasis treatment. Usually, after the wound surface is closed and hemostasis treatment is performed by the hemostatic clip, the local tissue inflammation process forms granulomas, which fall off on their own and are discharged from the body through the digestive tract, making the surgery have the advantages of less damage, fast hemostasis, low incidence of rebleeding, fewer complications, and definite efficacy.

A typical hemostatic clamping device includes three parts: a chuck assembly, a delivery assembly, and a manipulation assembly. In actual applications, the chuck assembly and the delivery assembly can be delivered into the patient's digestive tract through the clamp channel of a medical endoscope, so that the chuck assembly reaches the predetermined surgical position in the patient's body, and then the surgical action is performed through the manipulation assembly. The performed surgical action is then transmitted to the chuck assembly through the delivery assembly, so that the chuck assembly responds to the action, and the surgical wound is closed and hemostatic operations are performed. The chuck assembly is then separated from the delivery assembly through the manipulation assembly, and the chuck assembly is finally retained in the patient's body to clamp the surrounding tissues and blood vessels, thereby achieving the purpose of reducing the wound surface and closing the wound surface for hemostasis. The chuck assembly is usually made of stainless steel or precious metal.

In addition to the closing function, the existing hemostatic clip closing device also needs to have a rotating function. As the device has additional functions, the structure of the device is relatively complex, the cost of device manufacturing and quality control are greatly increased, and the stability of the device is also low.

Summary of the invention

The technical problem to be solved by the present invention is to provide an endoscopic hemostatic clipping device which has a simple structure, stable connection, can be rotated and repeatedly opened and closed, and is easy to release.

To achieve the above object, the technical solution adopted by the present invention is:

The invention provides an endoscopic hemostatic clamping device, which comprises a clamping head component, a conveying component and a manipulation component.

The clamp assembly includes an integrally formed clamp having an open state and a closed state, and a clamp seat having an accommodating cavity inside; the proximal end of the clamp is movably arranged in the accommodating cavity of the clamp seat, and the distal end of the clamp is located outside the clamp seat.

The conveying assembly includes a linkage assembly whose distal end is detachably connected to the clip, a connecting piece movably mounted on the linkage assembly and detachably connected to the clamp seat, and an outer tube assembly movably mounted on the linkage assembly and the connecting piece.

The operating assembly includes a handle, a first operating member capable of controlling the switching of the clip between an open state and a closed state and controlling the separation of the linkage assembly from the clip, and a second operating member capable of controlling the rotation of the clip; the proximal end of the outer tube assembly is fixedly connected to the handle, and the proximal end of the linkage assembly is fixedly connected to the first operating member.

A first mating piece is formed at the proximal end of the clip, and a first mating portion that can be mated with the first mating piece is formed at the proximal end of the clip seat. When the linkage assembly is separated from the clip, the first mating piece and the first mating portion cooperate to keep the clip in the closed state.

A second mating piece is formed on the connecting piece, and a second mating portion that can cooperate with the second mating piece is also formed at the proximal end of the clamp seat; when the second mating piece cooperates with the second mating portion, when the second operating piece drives the linkage assembly to rotate, the clip, the clamp seat and the connecting piece can rotate together.

A third mating piece is formed on the linkage assembly, and a third mating portion that can cooperate with the third mating piece is also formed on the connecting piece; when the third mating piece cooperates with the third mating portion, when the first operating piece drives the linkage assembly to move toward the proximal end, the linkage assembly can drive the connecting piece to separate from the clamping seat.

According to some specific embodiments, the proximal end of the linkage assembly is fixedly connected to the second operating member.

According to some specific embodiments, the clip includes an elastic bending portion located at the proximal end, clamp arms located on both sides of the elastic bending portion, A connecting groove is arranged at the proximal end of the elastic bending portion and an engaging tooth is arranged at the distal end of the clamping arm.

According to some specific embodiments, the first matching piece is a convex edge extending outwardly along the width direction of the clip, and the first matching portion is a convex strip that is connected to the clip seat only at a distal end and can be deformed.

According to some preferred embodiments, the first matching portion is formed by cutting on a wall of the clamp seat.

According to some preferred embodiments, the proximal end surface of the first matching portion does not exceed the proximal end surface of the clamp seat.

According to some specific embodiments, the second matching piece is a recessed portion sunken toward the interior of the connecting piece, and the second matching portion is a convex portion formed on the inner wall of the clamp seat and protruding toward the interior of the clamp seat.

According to some preferred embodiments, the second matching portion is fixed to the clamping seat by welding.

According to some other preferred embodiments, the second matching portion is formed by riveting the wall of the clamp seat inward.

According to some specific embodiments, the third matching piece is a surface intersecting with the axis of the linkage assembly, and the third matching portion is a surface intersecting with the axis of the linkage assembly.

According to some preferred embodiments, the third fitting member is a proximal end surface of the limiting tube.

According to some other preferred embodiments, the third matching portion is a distal end surface of the connecting body between the first portion and the second portion of the connecting member.

According to some specific embodiments, the connector includes a connector body having a through hole for the linkage assembly to pass through, a first part and a second part formed on opposite sides of a distal end surface of the connector body, the second mating part is respectively formed on the outer side wall of the first part and the outer side wall of the second part, an accommodating space is formed between the first part and the second part, and the minimum distance between the inner wall of the first part and the inner wall of the second part is greater than the inner diameter of the through hole.

According to some specific embodiments, a fourth fitting piece extending toward the outside of the connecting piece is formed at the proximal end of the connecting piece, and a fourth fitting portion protruding toward the inside of the outer tube assembly is formed on the inner wall of the outer tube assembly, and when the fourth fitting piece is matched with the fourth fitting portion, the outer tube assembly prevents the connecting piece from moving distally relative to the outer tube assembly.

According to some specific embodiments, a first limiting portion capable of cooperating with the first mating piece is formed on the inner wall of the clamp seat, and when the first limiting portion cooperates with the first mating piece, the first limiting portion prevents the clip from moving distally relative to the clamp seat.

According to some specific embodiments, a second limiting portion is formed at the distal end of the clamp seat, and a fifth mating piece is formed on the clip located outside the clamp seat. When the second limiting portion cooperates with the fifth mating piece, the second limiting portion prevents the clip from moving proximally relative to the clamp seat.

Specifically, the second limiting portion is a surface formed by folding two blocking pieces at the far end of the clamping seat inwardly.

According to some specific embodiments, grooves are formed between the first part and the second part of the connector and the connecting body to facilitate the linkage assembly to pass through the connector and to form the third matching portion.

According to some specific embodiments, a connecting groove for the linkage component to pass through is formed at the proximal end of the clip, and an enlarged portion is formed at the distal end of the linkage component. When the force applied to the linkage component exceeds a predetermined value, the connecting groove is deformed to separate the clip from the linkage component.

According to some specific embodiments, a connecting groove for the linkage assembly to pass through is formed at the proximal end of the clip, and an enlarged portion is formed at the distal end of the linkage assembly. When the linkage assembly is subjected to a force exceeding a predetermined value, the enlarged portion is deformed to separate the clip from the linkage assembly.

According to some specific embodiments, a connecting groove for the linkage assembly to pass through is formed at the proximal end of the clip, and an enlarged portion is formed at the distal end of the linkage assembly. When the linkage assembly is subjected to a force exceeding a predetermined value, the connecting groove and the enlarged portion are deformed to separate the clip from the linkage assembly.

According to some specific embodiments, the linkage assembly includes a pull rod with an enlarged portion at the distal end, a control wire fixed relative to the proximal end of the pull rod, a connecting tube fixedly mounted on the pull rod and the control wire, and a limiting tube fixedly mounted on the connecting tube, the third matching piece is the proximal end surface of the limiting tube, and the proximal end of the control wire is fixedly connected to the first operating piece and/or the second operating piece.

According to some other specific embodiments, a connecting groove is formed at the proximal end of the clip, and the linkage assembly includes a pin shaft and a pull rod. The pin shaft is located in the clip and the axial centerline direction of the pin shaft intersects with the extension direction of the connecting groove. The pull rod can pass through the connecting groove, and a hook portion capable of accommodating the pin shaft is formed at the distal end of the pull rod. When the pull rod is subjected to a force exceeding a predetermined value, the hook portion is deformed and separated from the pin shaft.

Specifically, the hook portion at the distal end of the pull rod is a deformable elastic component.

According to some other specific embodiments, the linkage assembly includes a pin, a pull rod detachably connected to the pin, a control line fixed relatively to the proximal end of the pull rod, and a connecting tube fixedly sleeved on the pull rod and the control line, the third mating piece is formed on the pull rod, the third mating piece is located at the distal end of the connecting tube, and the proximal end of the control line is fixedly connected to the first operating piece.

Preferably, the proximal end of the control wire is fixedly connected to the second operating member.

According to some specific embodiments, the outer diameter of the connecting tube is smaller than the inner diameter of the through hole, the outer diameter of the limiting tube is larger than the inner diameter of the through hole, and the outer diameter of the limiting tube is smaller than the width of the groove.

According to some specific embodiments, the first matching piece and the first matching portion are two symmetrically arranged ones.

According to some specific embodiments, the first matching portion and the second matching portion are staggered in the circumferential direction of the clamping seat.

According to some specific embodiments, the first matching portion and the second matching portion are staggered at an angle of 90° in the circumferential direction of the clamp seat.

According to some specific embodiments, the second matching piece and the second matching portion are two symmetrically arranged ones.

According to some specific embodiments, the first operating member is fixedly connected to the linkage assembly, the first operating member is slidably connected to the second operating member, and the second operating member is rotationally connected to the handle.

Furthermore, a slide groove extending in the proximal-distal direction is formed on the second operating member, and a slider inserted in the slide groove and capable of sliding in the slide groove is formed on the first operating member, and the relative sliding connection between the first operating member and the second operating member is achieved through the cooperation of the slide groove and the slider.

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

The hemostatic clip device provided by the present invention has a small number of parts and a simple structure. Each part has multiple functions and the connection between the parts is stable. The hemostatic clip device of the present invention can realize the functions of repeated opening, closing, and rotation of the hemostatic clip device with a simple structure. Moreover, the hemostatic clip device is easy to industrialize and greatly reduce the production cost and quality control cost.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a partial cross-sectional view of a hemostatic clip device in Example 1 of the present invention;

FIG2 is a cross-sectional view of a first cross section of a chuck assembly and a conveying assembly in Embodiment 1 of the present invention with the clips opened;

FIG3 is an enlarged view of the local structure of FIG2;

4 is a cross-sectional view of a second section of the chuck assembly and the conveying assembly in Embodiment 1 of the present invention with the clips opened (the first section is perpendicular to the second section);

FIG5 is an enlarged view of the local structure of FIG4;

6 is a cross-sectional view of a first cross section of the chuck assembly and the conveying assembly in Embodiment 1 of the present invention with the clips in a closed state;

7 is a cross-sectional view of the first cross section of the chuck assembly and the conveying assembly in Example 1 of the present invention after the chuck assembly is released;

8 is a cross-sectional view of the chuck assembly and the conveying assembly in Embodiment 1 of the present invention and a second cross-sectional view after the chuck assembly is released;

FIG9 is a schematic diagram of a three-dimensional structure of a clip in a specific embodiment of the present invention;

FIG10 is a front view of a clip in a specific embodiment of the present invention;

FIG. 11 is a left side view of a clip in a specific embodiment of the present invention.

FIG12 is a schematic diagram of the three-dimensional structure of a connecting piece in a specific embodiment of the present invention;

FIG13 is a cross-sectional view of a first cross section of a connector in a specific embodiment of the present invention;

FIG14 is a schematic diagram of the three-dimensional structure of the clamping base before assembly in a specific embodiment of the present invention;

FIG15 is a schematic diagram of a three-dimensional structure of a clamping base after assembly in a specific embodiment of the present invention;

FIG16 is a front view of the assembled clamping base in a specific embodiment of the present invention;

FIG17 is a left side view of the assembled clamping base in a specific embodiment of the present invention;

FIG18 is a cross-sectional view of a first cross section of the clamp seat after assembly in a specific embodiment of the present invention;

19 is a cross-sectional view of a second cross section of the clamp seat after assembly in a specific embodiment of the present invention;

FIG20 is a partial cross-sectional view of the hemostatic clip device in Example 2 of the present invention;

21 is a cross-sectional view of a first cross section of a chuck assembly and a conveying assembly in Embodiment 2 of the present invention with the clips opened;

FIG. 22 is a cross-sectional view of the second cross section of the chuck assembly and the conveying assembly in Embodiment 2 of the present invention with the clips opened (the first cross section is parallel to the second cross section). The two sections are perpendicular to each other);

23 is a cross-sectional view of a first cross section of the chuck assembly and the conveying assembly in Embodiment 2 of the present invention with the clips in a closed state;

24 is a cross-sectional view of a second cross section of the chuck assembly and the conveying assembly in Example 2 of the present invention with the clips in a closed state;

FIG25 is a cross-sectional view of a first cross section of a chuck assembly and a conveying assembly in Embodiment 2 of the present invention after the clip is released;

26 is a cross-sectional view of a second cross section of the chuck assembly and the conveying assembly in Embodiment 2 of the present invention after the clip is released;

in,
1. Clip; 101. Clip arm; 102. Engaging teeth; 13. Elastic bending portion; 14. Connecting groove; 15. First matching piece; 16. Fifth matching piece; 2. Pull rod; 21. Expanded portion; 22. Pin shaft; 23. Hook portion; 3. Limiting tube; 31. Third matching piece; 4. Connecting piece; 41. Third matching portion; 42. First part; 43. Second part; 44. Second matching piece; 45. Fourth matching piece; 46. Through hole; 47. Groove; 5. Outer tube connecting seat; 51. Fourth matching portion; 6. Outer tube; 7. Operating wire; 8. Connecting tube; 9. Clip seat; 91. First limiting portion; 92. First matching portion; 93. Second matching portion; 94. Second limiting portion; 95. Mounting groove; 10. Handle; 11. First operating piece; 12. Second operating piece.

Detailed ways

The present invention is further described below in conjunction with the examples. However, the present invention is not limited to the following examples. The implementation conditions used in the examples can be further adjusted according to the different requirements of specific use, and the implementation conditions not specified are conventional conditions in the industry. The technical features involved in each embodiment of the present invention can be combined with each other as long as they do not conflict with each other.

In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

In the description of the present invention, it is necessary to understand that the distal end refers to the end of the instrument or component away from the operator, and the proximal end refers to the end of the instrument or component close to the operator; the axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the instrument or component, the radial direction refers to the direction perpendicular to the axial direction, and the circumferential direction refers to the direction around the axial direction; the inside and the outside are positions defined by the distance relative to the center of the instrument or component, wherein the inside is a position close to the center of the instrument or component, and the outside is a position away from the center of the instrument or component. The description of the above-mentioned directional words is only for the convenience of describing the embodiments of the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

The disclosure below provides many different embodiments or examples to implement different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present invention. In addition, the embodiments of the present invention can repeat reference numbers and/or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and/or settings discussed.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Example 1

As shown in FIG. 1 to FIG. 19 , this embodiment provides an endoscopic hemostatic clipping device, which includes a clamp assembly, a conveying assembly, and a manipulation assembly.

The clamp assembly includes an integrally formed clamp 1 and a clamp seat 9 with an accommodating cavity therein. The clamp 1 has an open state and a closed state. As shown in FIGS. 9 to 11 , the clamp 1 includes an elastic bending portion 13 located at the proximal end, two clamp arms 101 located at the distal end and symmetrically arranged, and a connecting groove 14 opened on the proximal portion of the elastic bending portion 13. The two distal ends formed by the bending of the elastic bending portion 13 are respectively connected to the proximal ends of the clamp arms 101. The ends are integrally arranged, and the extending direction of the connecting groove 14 is consistent with the length direction of the elastic bending portion 13. As shown in Figures 14 to 19, the two ends of the clamp seat 9 are open, that is, the accommodating cavity of the clamp seat 9 is connected to the outside. The clamp arm 101 is located outside the distal end of the clamp seat 9, and at least the proximal part of the elastic bending portion 13 of the clip 1 extends into the accommodating cavity of the clamp seat 9. When the clip 1 moves toward the proximal end under the action of the conveying assembly, the elastic bending portion 13 of the clip 1 is restricted by the tube wall of the clamp seat 9, and the elastic bending portion 13 is deformed to make the two clamp arms 101 close to each other to realize the closure of the clamp assembly, and the clip 1 is further retracted into the accommodating cavity of the clamp seat 9. At this time, most or all of the elastic bending portion 13 is located in the accommodating cavity of the clamp seat 9.

The conveying assembly includes a pull rod 2, a connecting tube 8, a stop tube 3, a control line 7, a connecting piece 4, an outer tube connecting seat 5 and an outer tube 6. The pull rod 2, the connecting tube 8, the stop tube 3 and the control line 7 constitute a linkage assembly. Specifically, the connecting tube 8 is fixedly sleeved on the proximal part of the pull rod 2 and the distal part of the control line 7 to achieve a fixed connection between the pull rod 2 and the control line 7, and the stop tube 3 is fixedly sleeved on the distal part of the connecting tube 8. The outer tube connecting seat 5 and the outer tube 6 constitute an outer tube assembly. Specifically, the proximal part of the outer tube connecting seat 5 is fixedly connected to the distal part of the outer tube 6.

The pull rod 2 is detachably connected to the clip 1. When the pull rod 2 is connected to the clip 1, the clip 1 can move with the movement of the pull rod 2. The distal end of the pull rod 2 has an enlarged portion 21. Specifically, the pull rod 2 includes a main body portion and an enlarged portion 21 located at the distal end of the main body portion. Moreover, the maximum outer diameter of the enlarged portion 21 is greater than the maximum outer diameter of the main body portion. In this embodiment, the main body portion of the pull rod 2 is roughly cylindrical. When the pull rod 2 is connected to the clip 1, the main body portion of the pull rod 2 passes through the connecting groove 14 of the clip 1 and the enlarged portion 21 of the pull rod 2 is located in the space enclosed by the clip 1. The maximum outer diameter of the enlarged portion 21 is greater than the width of the connecting groove 14. Therefore, before the enlarged portion 21 and/or the connecting groove 14 of the clip 1 are deformed due to force, the pull rod 2 and the clip 1 are connected. When the pull rod 2 moves toward the proximal end to a value exceeding a predetermined value, the expanded portion 21 of the pull rod 2 and/or the connecting groove 14 of the clip 1 are deformed due to the force, and the expanded portion 21 passes through the connecting groove 14, thereby realizing the separation of the pull rod 2 and the clip 1. Furthermore, the limit tube 3 is located at the distal end of the clip 1, and the outer diameter of the limit tube 3 is greater than the width of the connecting groove 14, so that when the pull rod 2 drives the clip 1 to move toward the distal end, the limit tube 3 can provide a certain thrust to the clip 1.

The connecting piece 4 is movably sleeved on the connecting tube 8 , the connecting piece 4 is detachably connected to the clamping seat 9 , the outer tube connecting seat 5 is movably sleeved on the connecting piece 4 , and the operating wire 7 is movably inserted in the outer tube 6 .

The manipulation assembly includes a handle 10, a first operating member 11 and a second operating member 12. The handle 10 is fixedly connected to the proximal end of the outer tube 6, the handle 10 is rotatably connected to the second operating member 12, the first operating member 11 is only slidably connected to the second operating member 12, and the sliding direction of the first operating member 11 relative to the second operating member 12 is the proximal-distal direction. The first operating member 11 is fixedly connected to the manipulation wire 7, so that the manipulation wire 7 can rotate relative to the outer tube 6 as the second operating member 12 rotates relative to the handle 10, and the manipulation wire 7 can slide relative to the outer tube 6 along the proximal-distal direction as the first operating member 11 slides. The structure that realizes that the first operating member 11 can only slide relative to the second operating member 12 but cannot rotate can adopt the structure commonly used in the prior art, for example, a sliding groove extending along the proximal-distal direction is provided on the second operating member 12, and a slider inserted in the sliding groove and capable of sliding in the sliding groove is formed on the first operating member 11, and the relative sliding connection between the first operating member 11 and the second operating member 12 is realized by the cooperation of the sliding groove and the slider.

As shown in FIGS. 9 and 10 , the distal end of the clamp arm 101 has a meshing tooth 102. When the two clamp arms 101 are clamped, the meshing teeth 102 cooperate with each other to clamp the wound. Preferably, the meshing tooth 102 is in the shape of a sawtooth arc, so that the two clamp arms 101 are more tightly engaged and not easy to fall off. The meshing tooth 102, the clamp arm 101, the elastic bending portion 13 and the connecting groove 14 are integrally formed to form the clamp 1.

As shown in FIGS. 9 to 10, the integrally formed clip 1 also includes a convex edge provided at the proximal end of the elastic bending portion 13 and extending along the width direction of the clip 1, which is the first matching piece 15 of this embodiment. As shown in FIGS. 14 to 19, a convex strip which is connected to the clip seat 9 only at the distal end and can be deformed is provided at the proximal end of the clip seat 9, which is the first matching portion 92 of this embodiment. When the pull rod 2 of the linkage assembly drives the clip 1 to move toward the proximal end to the position closest to the proximal end, the first matching piece 15 on the clip 1 passes over the first matching portion 92 and moves to the proximal end of the first matching portion 92. When the pull rod 2 is separated from the clip 1, the first matching piece 15 and the first matching portion 92 cooperate to prevent the clip 1 from moving toward the distal end relative to the clip seat 9 and is kept in a closed state, as shown in FIG. 8.

Preferably, two convex edges are symmetrically arranged, and two convex strips are also symmetrically arranged. The convex strips are cut from the wall of the clamp seat 9, and the proximal end surface of the convex strips does not exceed the proximal end surface of the clamp seat 9, that is, the convex strips 9 will not extend to the proximal end of the clamp seat 9.

As shown in FIGS. 12 and 13 , the connector 4 includes a connector body having a through hole 46, a first portion 42 and a second portion 43. The first portion 42 and the second portion 43 are symmetrically formed on opposite sides of the distal end surface of the connector body, a groove 47 is formed between the first portion 42 and the second portion 43, and the minimum distance between the inner wall of the first portion 42 and the inner wall of the second portion 43 is greater than the inner diameter of the through hole 46. The outer diameter of 8 is smaller than the inner diameter of the through hole 46, and the outer diameter of the limiting tube 3 in the linkage assembly is larger than the inner diameter of the through hole 46 and smaller than the minimum distance between the inner wall of the first part 42 and the inner wall of the second part 43, so that the proximal end of the connecting tube 8 in the linkage assembly can pass through the groove 47 and the through hole 46, and the linkage assembly is movably connected with the connecting piece 4.

As shown in Figures 12 to 13, the outer side walls of the first part 42 and the second part 43 of the connector 4 are respectively provided with recesses that are recessed toward the inside of the connector 4, which are the second matching parts 44 in this embodiment. The wall surface at the distal end of the recess is inclined outwardly from the bottom surface of the recess toward the distal end, so that the connector 4 is easy to be separated from the clamp seat 9 when it is pulled toward the proximal end. As shown in Figures 14, 15 and 17, the side wall of the clamp seat 9 near the proximal end is symmetrically provided with protrusions protruding toward the inside of the clamp seat 9 in the circumferential direction, which are the second matching parts 93 in this embodiment. As shown in Figures 2 and 3, the connector 4 and the clamp seat 9 are detachably connected together. When the connecting member 4 is connected to the clamp seat 9, through the cooperation between the second matching member 44 and the second matching part 93, and the cooperation between the clip 1 and the clamp seat 9, when the second operating member 12 rotates relative to the handle 10, the linkage component is driven to rotate, and the linkage component drives the clip 1 to rotate, and the rotation of the clip 1 drives the clamp seat 9 to rotate. Due to the action force between the second matching member 44 and the second matching part 93, the connecting member 4 can finally rotate together with the clamp seat 9.

Preferably, as shown in Figures 14 and 15, the positions of the first mating portion 92 and the second mating portion 93 on the clamp seat 9 are staggered along the circumferential direction, so that the mating between the first mating portion 92 and the first mating piece 15 on the clip 1 and the mating between the second mating portion 93 and the second mating piece 44 on the connecting piece 4 are not likely to interfere with each other.

Preferably, the second mating portion 93 is formed on the proximal inner wall of the clamp seat 9 by welding, or is formed on the proximal inner wall of the clamp seat 9 by riveting after the clamp seat 9 and the connector 4 are assembled.

In this embodiment, the proximal surface of the stop tube 3 is the third matching piece 31 of this embodiment, and the third matching piece 31 is a plane perpendicular to the axis of the linkage assembly, as shown in FIG2. The distal surface of the connecting body between the first part 42 and the second part 43 on the connecting member 4 forms the third matching portion 41 of this embodiment, and the third matching portion 41 is a plane perpendicular to the axis of the linkage assembly, as shown in FIG3. Since the outer diameter of the connecting tube 8 is smaller than the inner diameter of the through hole 46, the outer diameter of the stop tube 3 is larger than the inner diameter of the through hole 46, and the outer diameter of the stop tube 3 is smaller than the width of the groove 47 (i.e., the distance between the first part 42 and the second part 43), when the first operating member 11 drives the operating wire 7 of the linkage assembly to move toward the proximal end, the stop tube 3 moves toward the proximal end accordingly, and the third matching piece 31 on the stop tube 3 contacts the third matching portion 41 on the connecting member 4, as shown in FIG6. When the first operating member 11 continues to move toward the proximal end, the limiting tube 3 applies force to the connecting member 4 to overcome the matching force between the connecting member 4 and the clamping seat 9, thereby realizing the separation of the connecting member 4 and the clamping seat 9.

The proximal end of the connector 4 is formed with a fourth matching piece 45 extending toward the outside of the connector 4, as shown in Figures 12 to 13. The inner wall of the outer tube connector 5 is formed with a convex portion protruding toward the inside of the outer tube connector 5, which is the fourth matching portion 51 of this embodiment, as shown in Figure 5. When the fourth matching portion 51 is matched with the fourth matching piece 45, the fourth matching portion 51 can prevent the connector 4 from moving toward the distal end.

As shown in Figures 14 to 19, a first limiting portion 91 is provided on the clamp seat 9. The first limiting portion 91 is located in the middle of the side wall of the clamp seat 9 and is symmetrically arranged in the circumferential direction. In this embodiment, the first limiting portion 91 is an elastic clamping edge that warps inward. As shown in Figure 19, the first limiting portion 91 and the first matching portion 92 are aligned in the axial direction. When the first operating member 11 drives the linkage assembly to release toward the distal end, the clip 1 moves toward the distal end of the clamp seat 9 and the clip 1 opens. When the clip 1 moves toward the distal end until the first matching member 15 at the proximal end of the clip 1 contacts the first limiting portion 91, the first limiting portion 91 prevents the clip 1 from continuing to move toward the distal end. At this time, the clip 1 is in the maximum open position.

The distal end surface of the clamp seat 9 is also provided with a second limiting portion 94. Preferably, the second limiting portions 94 are symmetrically arranged in two parts. As shown in FIG15 , a mounting groove 95 is formed between the second limiting portion 94 and the tube wall of the clamp seat 9 for the elastic bending portion 13 of the clip 1 to pass through. When the clamp seat 9 is assembled, the pull rod 2 receives the clip 1 into the clamp seat 9, and then the two baffles are bent inward to form the second limiting portion 94, as shown in FIGS. 14 and 15 .

A fifth matching piece 16 is formed on the clip 1 located outside the clip seat 9, as shown in Figures 9 to 11. Specifically, the fifth matching piece 16 is formed at the proximal end of the clamp arm 101 and extends and protrudes toward the inside of the clip 1. When the first operating member 11 drives the linkage assembly to move proximally until the second limiting portion 94 of the clamp seat 9 cooperates with the fifth matching piece 16 on the clip 1, the second limiting portion 94 will prevent the clip 1 from moving proximally, so that when the linkage assembly continues to be driven to move proximally, the enlarged portion 21 of the pull rod 2 of the linkage assembly and/or the connecting groove 14 of the clip 1 are deformed by force, and then the enlarged portion 21 is disengaged from the connecting groove 14, completing the separation of the pull rod 2 and the clip 1.

When in use, when the first operating member 11 is moved toward the distal end, the first operating member 11 will push the control line 7 to drive the pull rod 2, the connecting tube 8 and the limit tube 3 in the linkage assembly to move toward the distal end together, and under the action of the elastic force of the clip 1 itself, the clip 1 moves toward the distal end together with the linkage assembly until the part extending out of the clamp seat 9 increases, thereby achieving the purpose of opening the clip 1. As shown in FIG. 4, when the clip 1 moves to the first coupling of the clip 1, the first coupling of the clip 1 is opened. When the engaging member 15 cooperates with the first limiting portion 91 on the clamp seat 9, the clip 1 cannot continue to move toward the distal end due to the action of the first limiting portion 91, and the clip 1 is now opened to the maximum. When the first operating member 11 is moved toward the proximal end, the first operating member 11 pulls the control line 7 to drive the linkage assembly to move toward the proximal end, so that the clip 1 moves toward the proximal end relative to the clamp seat 9, and the part of the clip 1 contracted in the clamp seat 9 increases, and the clip 1 is closed under the restriction of the tube wall of the clamp seat 9, as shown in FIG6. When the clip 1 needs to be opened and closed repeatedly, it is only necessary to repeatedly slide the first operating member 11 toward the proximal end or the distal end.

After the clip 1 is closed, the linkage assembly continues to move toward the proximal end. At this time, the linkage assembly drives the clip 1 to further retract into the clamp seat 9 until the clip 1 moves toward the proximal end until the fifth matching piece 16 on the clip 1 matches with the second limiting portion 94 at the distal end of the clamp seat 9. The second limiting portion 94 limits the clip 1 from continuing to move toward the proximal end. At this time, the first operating member 11 continues to move toward the proximal end, and the operating line 7 drives the joint assembly to continue to move toward the proximal end. The enlarged portion 21 at the distal end of the pull rod 2 or the connecting groove 14 on the clip 1, or the enlarged portion 21 at the distal end of the pull rod 2 and the connecting groove 14 on the clip 1 are deformed so that the linkage assembly is separated from the connecting groove 14, and the clip 1 is separated from the pull rod 2. In this process, the third matching piece 31 on the limiting tube 3 and the third matching portion 41 on the connecting piece 4 cooperate with each other, so that under the action of the limiting tube 3, the connecting piece 4 is driven to move toward the proximal end to overcome the interaction force between the connecting piece 4 and the clamp seat 9, so that the connecting piece 4 is separated from the clamp seat 9. After the clip 1 is separated from the pull rod 2, the first mating piece 15 on the clip 1 is located at the proximal end of the first mating portion 92 on the clamp seat 9 and contacts the first mating portion 92. The cooperation between the first mating portion 92 and the first mating piece 15 keeps the clip 1 in a closed state, thereby releasing the clamp assembly and putting the clamp assembly in a released state, as shown in Figures 7 and 8.

Before the chuck assembly is released, when the clip 1 needs to be rotated, the second operating member 12 is rotated to drive the first operating member 11 to rotate. Since the first operating member 11 is fixedly connected to the linkage assembly, the first operating member 11 will drive the linkage assembly to rotate, and the linkage assembly will drive the clip 1 to rotate, the clip 1 will drive the clamp seat 9 to rotate, and the clamp seat 9 will drive the connecting member 4 to rotate, thereby realizing the rotation of the chuck assembly.

Example 2

This embodiment is basically the same as the first embodiment, and the only difference lies in the structure of the linkage assembly and the arrangement of the third matching member 31, as shown in Figures 20 to 26.

As shown in Figure 21, the linkage assembly in this embodiment includes a pin 22, a pull rod 2 detachably connected to the pin 22, a control line 7 fixed relatively to the proximal end of the pull rod 2, and a connecting tube 8 fixedly sleeved on the proximal end portion of the pull rod 2 and the distal end portion of the control line 7.

The pin 22 is located in the clip 1 and the axis direction of the pin 22 intersects with the extension direction of the connection slot 14 at the proximal end of the clip 1. The distal end of the pull rod 2 is formed with a hook portion 23 capable of accommodating the pin 22. The pull rod 2 can pass through the connection slot 14 at the proximal end of the clip 1. When the force on the pull rod 2 exceeds a predetermined value, the hook portion 23 is deformed and separated from the pin 22 to separate the clip 1 from the linkage assembly. In this embodiment, the pull rod 2 is flat.

As shown in FIG. 21 , the third fitting member 31 is disposed on the pull rod 2. The third fitting member 31 is a protrusion extending outward along the width direction of the pull rod 2. The third fitting member 31 is located at the distal end of the connecting tube 8. The proximal surface of the third fitting member 31 is an inclined surface intersecting the axial center line of the linkage assembly. The proximal surface of the third fitting member 31 is inclined outward from the proximal end of the third fitting member 31 to the distal end. The width of the third fitting member 31 is greater than the inner diameter of the through hole 46, and the width of the third fitting member 31 is less than the width of the groove 47. Therefore, when the chuck assembly is released, the third fitting member 31 on the pull rod 2 can cooperate with the third fitting portion 41 on the connecting member 4 so that the connecting member 4 and the pull rod 2 move toward the proximal end together to separate the connecting member 4 from the clamp seat 9.

The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them, but it does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

An endoscopic hemostatic clipping device comprises a clamp assembly, a conveying assembly and a manipulation assembly, and is characterized in that:

The clamp assembly comprises a clamp (1) having an open state and a closed state and being integrally formed, and a clamp seat (9) having an accommodating cavity inside; the proximal end of the clamp (1) is movably arranged in the accommodating cavity of the clamp seat (9), and the distal end of the clamp (1) is located outside the clamp seat (9);

The conveying assembly comprises a linkage assembly whose distal end is detachably connected to the clip (1), a connecting piece (4) movably sleeved on the linkage assembly and detachably connected to the clip seat (9), and an outer tube assembly movably sleeved on the linkage assembly and the connecting piece (4);

The operating assembly comprises a handle (10), a first operating member (11) capable of controlling the switching of the clip (1) between an open state and a closed state and controlling the separation of the linkage assembly from the clip (1), and a second operating member (12) capable of controlling the rotation of the clip (1); the proximal end of the outer tube assembly is fixedly connected to the handle (10), and the proximal end of the linkage assembly is fixedly connected to the first operating member (11) and/or the second operating member (12);

A first matching piece (15) is formed at the proximal end of the clip (1), and a first matching portion (92) capable of matching with the first matching piece (15) is formed at the proximal end of the clip seat (9); when the linkage assembly is separated from the clip (1), the first matching piece (15) and the first matching portion (92) match to keep the clip (1) in the closed state;

A second matching piece (44) is formed on the connecting piece (4), and a second matching portion (93) capable of matching with the second matching piece (44) is also formed at the proximal end of the clamping seat (9); when the second matching piece (44) matches with the second matching portion (93), when the second operating member (12) drives the linkage assembly to rotate, the clip (1), the clamping seat (9) and the connecting piece (4) can rotate together;

A third matching piece (31) is formed on the linkage assembly, and a third matching portion (41) capable of matching with the third matching piece (31) is also formed on the connecting piece (4); when the third matching piece (31) matches with the third matching portion (41), when the first operating piece (11) drives the linkage assembly to move toward the proximal end, the linkage assembly can drive the connecting piece (4) to separate from the clamping seat (9).
The endoscopic hemostatic clamping device according to claim 1 is characterized in that: the first mating piece (15) is a convex edge extending outward along the width direction of the clip (1), and the first mating portion (92) is a convex strip that is connected to the clip seat (9) only at the distal end and can be deformed.
The endoscopic hemostatic clamping device according to claim 2 is characterized in that: the first matching portion (92) is formed by cutting on the wall of the clamp seat (9), and/or the proximal surface of the first matching portion (92) does not exceed the proximal surface of the clamp seat (9).
The endoscopic hemostatic clamping device according to claim 1 is characterized in that the second matching piece (44) is a recessed portion sunken toward the interior of the connecting piece (4), and the second matching portion (93) is a convex portion formed on the inner wall of the clamp seat (9) and protruding toward the interior of the clamp seat (9).
The endoscopic hemostatic clipping device according to claim 4 is characterized in that the second matching portion (93) is fixed to the clamping seat (9) by welding, or the second matching portion (93) is formed by riveting the wall of the clamping seat (9) inward.
The endoscopic hemostatic clipping device according to claim 1 is characterized in that the third matching piece (31) is a surface intersecting with the axis of the linkage assembly, and the third matching portion (41) is a surface intersecting with the axis of the linkage assembly.
The endoscopic hemostatic clipping device according to claim 1 is characterized in that: the connecting member (4) includes a connecting member body having a through hole (46) for the linkage assembly to pass through, a first part (42) and a second part (43) formed on opposite sides of the distal end surface of the connecting member body, the second matching member (44) is respectively formed on the outer wall of the first part (42) and the outer wall of the second part (43), an accommodating space is formed between the first part (42) and the second part (43), and the minimum distance between the inner wall of the first part (42) and the inner wall of the second part (43) is greater than the inner diameter of the through hole (46), and the distal end surface of the connecting body between the first part (42) and the second part (43) is the third matching portion (41).
The endoscopic hemostatic clipping device according to claim 1 is characterized in that: a fourth fitting piece (45) extending toward the outside of the connecting piece (4) is formed at the proximal end of the connecting piece (4), and a fourth fitting portion (51) protruding toward the inside of the outer tube assembly is formed on the inner wall of the outer tube assembly, and when the fourth fitting piece (45) is matched with the fourth fitting portion (51), the outer tube assembly prevents the connecting piece (4) from moving toward the distal end relative to the outer tube assembly.
The endoscopic hemostatic clipping device according to claim 1 is characterized in that a first limiting portion (91) capable of cooperating with the first matching piece (15) is formed on the inner wall of the clamp seat (9); when the first limiting portion (91) cooperates with the first matching piece (15), the first limiting portion (91) prevents the clip (1) from moving distally relative to the clamp seat (9).
The endoscopic hemostatic clamping device according to claim 1 is characterized in that: a second limiting portion (94) is formed at the distal end of the clamp seat (9), and a fifth matching piece (16) is formed on the clip (1) located outside the clamp seat (9); when the second limiting portion (94) cooperates with the fifth matching piece (16), the second limiting portion (94) prevents the clip (1) from moving proximally relative to the clamp seat (9).
The endoscopic hemostatic clipping device according to claim 1 is characterized in that: a connecting groove (14) is formed at the proximal end of the clip (1) for the linkage component to pass through, and an enlarged portion (21) is formed at the distal end of the linkage component, and when the linkage component is subjected to a force exceeding a predetermined value, the connecting groove (14) and/or the enlarged portion (21) are deformed to separate the clip (1) from the linkage component;

And/or, a connecting groove (14) is formed at the proximal end of the clip (1), the linkage assembly includes a pin shaft (22) and a pull rod (2), the pin shaft (22) is located in the clip (1) and the axial centerline direction of the pin shaft (22) intersects with the extension direction of the connecting groove (14), the pull rod (2) can pass through the connecting groove (14), and a hook portion (23) capable of accommodating the pin shaft (22) is formed at the distal end of the pull rod (2), and when the force applied to the pull rod (2) exceeds a predetermined value, the hook portion (23) is deformed and separated from the pin shaft (22).
The endoscopic hemostatic clipping device according to claim 1 or 11 is characterized in that: the linkage assembly includes a pull rod (2) whose distal end is an enlarged portion (21), a control line (7) fixed relative to the proximal end of the pull rod (2), a connecting tube (8) fixedly sleeved on the pull rod (2) and the control line (7), and a limiting tube (3) fixedly sleeved on the connecting tube (8), the third matching member (31) is the proximal end surface of the limiting tube (3), and the proximal end of the control line (7) is fixedly connected to the first operating member (11) and/or the second operating member (12);

And/or, the linkage assembly includes a pin shaft (22), a pull rod (2) detachably connected to the pin shaft (22), a control line (7) fixed relative to the proximal end of the pull rod (2), and a connecting tube (8) fixedly mounted on the pull rod (2) and the control line (7); the third matching component (31) is formed on the pull rod (2), the third matching component (31) is located at the distal end of the connecting tube (8), and the proximal end of the control line (7) is fixedly connected to the first operating component (11) and/or the second operating component (12).
The endoscopic hemostatic clamping device according to claim 1 is characterized in that: the first mating piece (15) and the first mating portion (92) are two symmetrically arranged ones, and/or the first mating portion (92) and the second mating portion (93) are staggered in the circumferential direction of the clamping seat (9), and/or the second mating piece (44) and the second mating portion (93) are two symmetrically arranged ones.
The endoscopic hemostatic clipping device according to claim 1 is characterized in that: the first operating member (11) is fixedly connected to the linkage assembly, the first operating member (11) is slidably connected to the second operating member (12), and the second operating member (12) is rotationally connected to the handle (10).