CN219814223U

CN219814223U - Hemostatic clamp

Info

Publication number: CN219814223U
Application number: CN202320029130.2U
Authority: CN
Inventors: 宗林新; 张忠民; 葛泉波; 寇鹏
Original assignee: Leo Medical Co ltd
Current assignee: Leo Medical Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-10-13
Anticipated expiration: 2033-01-06

Abstract

The utility model provides a hemostatic clip, which comprises a chuck assembly, a conveyor and a connecting assembly; the chuck assembly comprises a pair of clamping pieces and a sleeve which can be used for accommodating the clamping pieces in the gathering part; the conveyer comprises a spring tube, a connecting sleeve connected with the front end of the spring tube, a handle assembly connected with the rear end of the spring tube, and a rotatable pull rod shaft penetrating the inside of the spring tube, wherein the front end of the pull rod shaft is connected with a pair of clamping pieces, and the rear end of the pull rod shaft is connected with the handle assembly; the front end of the connecting component is connected with the rear end of the sleeve, and the rear end of the connecting component is connected with the connecting sleeve and axially fixed and circumferentially rotated; the handle component and the pull rod shaft drive the chuck component to rotate through the connecting component, and the connecting component can deform or break when being subjected to preset tensile force so that the chuck component is released; the hemostatic clamp can be used for flexibly rotating and accurately adjusting the angle of the digestive tract endoscope, so that a doctor can quickly and accurately adjust the angle of the clamp and a focus, the focus can be better clamped, the operation time is saved, and the operation risk is reduced.

Description

Hemostatic clamp

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a hemostatic clamp capable of being conveniently separated.

Background

In clinical medicine, the digestive tract system can often cause gastrointestinal bleeding due to diseases, accidental injuries and injuries during treatment. The current common hemostasis methods include injection, drug spraying, high-frequency electrocoagulation, laser, argon firing and hemostatic clamping to close the bleeding site. Wherein, the hemostatic clamp is used for closing and stopping bleeding at the bleeding position, and has the advantages of small traumatism, high hemostatic speed, low occurrence rate of re-bleeding, few complications and definite curative effect, thus becoming the most effective and most clinical application value method for non-operative treatment of digestive tract bleeding. The hemostatic clip can also close the mucous membrane injury of the digestive tract to a certain extent, promote the wound healing of the mucous membrane injury, and can also close the small fistula of the digestive tract to avoid the open surgery.

Because the hemostatic clip is delivered to the lesion through a 1-2 meter flexible endoscope, the endoscope can bend multiple times within the living body, resulting in a typical hemostatic clip that can only adjust the angle of the clip by rotating the spring tube. The angle can be quickly, accurately and flexibly adjusted, which is very important for closing the focus of the digestive tract of organisms and is urgent for doctors in actual operations

In order to solve the problems, the utility model designs a hemostatic clamp which can enable the clamp to accurately and rapidly rotate corresponding to a conveyer at the rear end.

Disclosure of Invention

The utility model aims to provide the hemostatic clamp which can be used for flexibly rotating and accurately adjusting the angle of the digestive tract endoscope, so that a doctor can quickly and accurately adjust the angle of the clamp and a focus, the focus can be better clamped, the operation time is saved, and the operation risk is reduced.

According to one aspect of the present utility model, there is provided a hemostatic clip comprising a clip assembly, a conveyor, and a connector assembly; the chuck assembly comprises a pair of clamping pieces and a sleeve which can be used for accommodating the clamping pieces in a gathering part; the conveyer comprises a spring tube, a connecting sleeve connected with the front end of the spring tube, a handle assembly connected with the rear end of the spring tube, and a pull rod shaft penetrating through the spring tube and rotatable, wherein the front end of the pull rod shaft is connected with the first end of the spring tube

The clamping piece is connected, and the rear end of the pull rod shaft is connected with the handle assembly; the front end of the connecting component is connected with the rear end of the 5 sleeve, and the rear end of the connecting component is connected with the connecting sleeve and axially fixed and circumferentially rotated; by a means of

The handle assembly and the pull rod shaft drive the chuck assembly to rotate through the connecting assembly, and the connecting assembly can deform or break when being subjected to preset tensile force so that the chuck assembly is released.

Preferably, the connecting assembly comprises an outer rotary cylinder connected with the sleeve, and a welding connection with the outer rotary cylinder

An inner barrel connecting the sleeve and the outer barrel; the inner rotary cylinder is sleeved in the connecting sleeve 0, and the inner rotary cylinder and the connecting sleeve are axially locked and circumferentially rotated; the connecting piece connects the sleeve with the outer part

The rotating drum is relatively locked in the axial direction and the circumferential direction; the connector is deformable upon a predetermined pulling force to disengage the sleeve from the outer rotor.

Preferably, the connecting piece comprises a connecting buckle and a connecting hole, and the pull rod shaft passes through the connecting hole and the connecting hole

The pull rod shaft is axially movable with the connecting piece and circumferentially fixed; the rear end of the sleeve is provided with a sleeve hole 5, the front end of the outer rotary cylinder is provided with a rotary cylinder groove, and the rear end of the sleeve is sleeved in the front end of the outer rotary cylinder and is communicated with

The sleeve is relatively locked with the outer rotary drum in the axial direction and the circumferential direction by inserting the connecting buckle into the sleeve hole and the rotary drum groove, and the connecting buckle can deform when a preset tensile force is applied to enable the sleeve to be separated from the outer rotary drum.

Preferably, the front end of the pull rod shaft is provided with a pull rod head, the pull rod shaft is connected with the pair of clamping pieces through the pull rod head, and the head end of the pull rod is provided with a notch.

0 preferably, the handle assembly comprises a handle bar and a handle which is sleeved with the handle bar and is connected with the handle

The handle rod is in sliding fit, the pull rod shaft penetrates through the handle rod to be connected with the handle, and the rear end of the spring tube is connected with the handle rod.

Preferably, the handle further comprises a nut connected with the distal end of the handle rod, and the handle rod and the nut are rotatable circumferentially.

5 preferably, the front end of the sleeve is provided with a radially extending blocking shaft which is penetrated in a pair of clamps

The sheets are arranged between each other; when the sleeve is moved in and out, the pair of clamping pieces are switched between a closed state and an open state.

Preferably, the front end of the pull rod shaft is connected with the pair of clamping pieces through the connecting shaft.

Preferably, tail hooks protruding outwards are respectively arranged at the rear ends of the two clamping pieces; two bulges which radially extend to stop the tail hook are arranged in the rear end of the sleeve; the tail hook is matched with the bulge.

The hemostatic clamp can be used for flexibly rotating and accurately adjusting the angle of the digestive tract endoscope, so that a doctor can quickly and accurately adjust the angle of the clamp and a focus, the focus can be better clamped, the operation time is saved, and the operation risk is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the solution of the present utility model;

FIG. 2 is a schematic view of the structure at the proximal end of the clip;

FIG. 3 is a schematic view of the structure at the distal end of the hemostatic clip;

FIG. 4 is a schematic view of the pull rod shaft in a broken configuration;

FIG. 5 is a diagram of an embodiment of a pull rod shaft;

fig. 6 is a state diagram of the clip being closed.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, and the preferred embodiments of the present utility model are presented in the accompanying drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, so that the utility model is not limited to the specific embodiments disclosed below.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. In the description of the present utility model, the meaning of "several" means at least one, such as one, two, etc., unless specifically defined otherwise. 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 utility model belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In this document, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless explicitly stated or limited otherwise. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements.

For convenience of description, the end of the spring tube far from the operator is defined as the distal end, i.e., the front end, and the end held by the operator is the proximal end, i.e., the rear end, along the length direction thereof in the present description.

Embodiments of the utility model are further elaborated below in connection with the drawings of the specification.

As shown in fig. 1 to 6, the hemostatic clip of embodiment 1 includes: the handle assembly 4 comprises a handle rod 41 and a handle 42, wherein the handle 42 is sleeved on the handle rod 41 and is in axial sliding fit with the handle rod 41; the conveyer 2 comprises a spring tube 21, a connecting sleeve 22 connected with the front end of the spring tube 21, and a handle rod 41 connected with the rear end of the spring tube 21, a rotatable pull rod shaft 23 penetrating through the spring tube 21, wherein the front end of the pull rod shaft 23 is connected with the pair of clamping pieces 11, the rear end of the pull rod shaft 23 is connected with the handle assembly 4, and specifically, the rear end of the pull rod shaft 23 penetrates through the handle rod 41 to be connected with a handle 42; the chuck assembly 1 comprises a pair of clamping pieces 11 and a sleeve 12 which can receive the clamping pieces 11 in a gathering part; the connecting shaft 6 and the front end of the pull rod shaft 23 are connected to the pair of clips 11 through the connecting shaft 6. The end of the sleeve 12 is provided with a radially extending blocking shaft 122, the clamping piece 11 is positioned in the sleeve 12, the blocking shaft 34 is arranged between the two clamping pieces in a penetrating way, and when the sleeve 12 is in and out, the two clamping pieces are switched between a closed state and an open state; the front end of the connecting component 3 is connected with the rear end of the sleeve 12, and the rear end of the connecting component 3 is connected with the connecting sleeve 22 and axially fixed and circumferentially rotated; the handle assembly 4 and the pull rod shaft 23 drive the chuck assembly 1 to rotate through the connecting assembly 3, and the connecting assembly 3 can deform or break when being subjected to preset tensile force so that the chuck assembly 1 is released; specifically, the connecting assembly 3 includes an outer rotary drum 31 connected with the sleeve 12, an inner rotary drum 32 welded with the outer rotary drum 31, and a connecting piece 33 connecting the sleeve 12 and the outer rotary drum 31; the inner rotary drum 32 is sleeved in the connecting sleeve 22, the inner rotary drum 32 and the connecting sleeve 22 axially lock and circumferentially rotate, specifically, a first boss 321 is formed on the outer periphery of the inner rotary drum 32, a first groove 221 is formed on the inner periphery of the connecting sleeve 22, and the first boss 321 and the first groove 221 cooperate to enable the inner rotary drum 32 and the connecting sleeve 22 to axially lock and circumferentially rotate; the connecting piece 33 comprises a connecting buckle 331 and a connecting hole 332, the pull rod shaft 23 passes through the connecting hole 332 to be connected with the pair of clamping pieces 11, and the pull rod shaft 23 and the connecting piece 33 are axially movable and circumferentially fixed; the rear end of the sleeve 12 is provided with a sleeve hole 121, the front end of the outer rotary drum 31 is provided with a rotary drum groove 311, the rear end of the sleeve 12 is sleeved in the front end of the outer rotary drum 31, the sleeve 12 and the outer rotary drum 31 are locked relatively in the axial direction and the circumferential direction by inserting the sleeve hole 121 and the rotary drum groove 311 through a connecting buckle 331, and the connecting buckle 331 can deform when receiving preset tensile force so that the sleeve 12 and the outer rotary drum 31 are separated. The inner rotary drum 32 is connected with the connecting sleeve 22 at the front end of the spring tube 21 and the inner rotary drum and the connecting sleeve are in relative rotation in the circumferential direction, and the connecting piece 33 is connected with the sleeve 12 and the outer rotary drum 31 and is locked in the axial direction and the circumferential direction; the front end of the pull rod shaft 23 is connected with the pair of clamping pieces 11, and the pull rod shaft 23 is matched with the periphery Xiang Suojin of the connecting piece 33; the connection between the connecting piece 33 and the sleeve 12 and the connection between the pull rod shaft 23 and the pair of clamping pieces 11 can be broken under the same constraint tension; the handle rod 42 is rotated to drive the pull rod shaft 23 and the connecting piece 33 to rotate so as to drive the sleeve 12, the outer rotary cylinder 31, the inner rotary cylinder 32 and the clamping piece 11 to jointly rotate; the handle 42 is pushed and pulled to drive the pull rod shaft 23 to axially move so as to drive the clamping piece 11 to move inwards of the sleeve 12 or outwards of the sleeve 12, and the clamping piece 11 is closed and opened.

According to the utility model, the connection of the spring tube 21 and the sleeve 12 is realized through the connecting piece 33, the outer rotary cylinder 31 and the inner rotary cylinder 32, the spring tube 21 and the sleeve 12 are axially locked and relatively rotate in the circumferential direction, the pull rod shaft 23 is matched with the circumference Xiang Suojin of the connecting piece 33, the rotation of the connecting piece 33, the outer rotary cylinder 31, the inner rotary cylinder 32 and the sleeve 12, namely the whole chuck assembly, is realized through the transmission torque of the pull rod shaft 23, the whole structure is simple, the operation is convenient, and the 360-degree rotation can be realized; when the pull rod shaft 23 pulls the clamping piece 11 to enter and exit the sleeve 12, the clamping piece 11 can be opened and closed, and the clamping piece can be opened and closed for a plurality of times.

As shown in fig. 1 and 2, in the present embodiment, the handle assembly 4 includes a handle bar 41 and a handle 42, wherein the handle 42 is sleeved on the handle bar 41 and axially slidably cooperates with the handle bar 41; the two can be locked circumferentially, so that the handle 42 is convenient to rotate to drive the handle bar 41 to rotate. In order to facilitate connection of the spring tube 21 and the handle bar 41, as shown in fig. 2, a nut 5 is connected to the distal end of the handle bar 21 in this embodiment, the nut 5 is screwed with the spring tube 21, and the handle bar 41 and the handle 42 can both rotate relative to the nut 5.

As shown in fig. 4 and 5, the pull rod shaft 23 is formed by connecting a main body section, a connecting pipe and a pull rod head 231, the pull rod head 231 is arranged at the front end of the pull rod shaft 23, a notch 2311 is arranged at the end of the pull rod head 231, and the pull rod shaft 23 is connected with the pair of clamping pieces 11 through the pull rod head 231 and the connecting shaft 6; the stretching shaft 23 is flat and long, the connecting hole 332 of the connecting piece 33 is a square hole, and the stretching shaft 23 is inserted into the square hole to realize torque transmission. The body section is connected to the handle 42 through the spring tube 21, and can be pushed and pulled by the handle 42 or can be rotated by the handle 42 and the handle lever 41. The structure of the pull rod shaft 23 is not limited thereto, and the engagement with the link 33 is not limited thereto. The handle 42 is pulled, the end part of the pull rod shaft 23 is provided with a notch 2311, the pull rod shaft 23 falls off from the connecting shaft 6 through the notch 2311, a connecting pipe of the pull rod shaft 23 can pass through a connecting hole 332 of the connecting piece 33, a pull rod head 231 of the pull rod shaft 23 can be clamped on the connecting hole 332, and the handle 42 is pulled continuously, so that the connecting buckle 331 is driven to straighten, and the separation of the sleeve 12 and the outer rotary drum 31 is realized.

As shown in fig. 3 and 4, in the present embodiment, the connecting member 33 has a bending structure, the bending portion of the connecting member 33 has a connecting hole 332 through which the pull rod shaft 23 passes, and the connecting hole 332 is a square hole, so that circumferential locking between the pull rod shaft 23 and the connecting member 33 can be achieved. The bending part of the connecting piece 33 is connected with the outer rotary drum 31 and the sleeve 12, the connecting piece 33 is in a bending shape, the connecting piece 331 is formed by bending and extending, the sleeve hole 121 is formed in the inner wall of the sleeve 12, the rotary drum groove 311 is formed in the inner wall of the outer rotary drum 31, the connecting piece 331 is clamped in the sleeve hole 121 and the rotary drum groove 311, and the connecting piece 331 is straightened under constraint tension. In this embodiment, the connecting buckle 331 is clamped in the sleeve hole 121 and the drum groove 311, so that the axial connection and circumferential constraint of the connecting piece 33, the sleeve 12 and the outer drum 31 are realized, and the three are integrated in the axial direction and the circumferential direction. When the connecting piece 33 needs to be separated, the connecting piece 331 is only required to be straightened, and the connection between the connecting piece 33 and the sleeve 32 and the connection between the connecting piece and the outer rotating cylinder 31 are broken.

As shown in fig. 6, the rear ends of the two clips 11 in the present embodiment are respectively provided with tail hooks 111 protruding outward; two protrusions 123 which radially extend to stop the tail hooks 111 are arranged in the rear end of the sleeve 12, the tail hooks 111 are matched with the protrusions 123, and therefore two clamping pieces 11 can enter the sleeve 12 to be locked, and the locking function of the clamping pieces is achieved. Before the locking, the two clamping pieces 11 can be pushed and pulled for multiple times by the pull rod shaft 23 to enter and exit the sleeve 12, namely, the repeated opening and closing of the clamping pieces can be realized.

As shown in fig. 5 and 6, in order to facilitate the detachment of the chuck assembly, in this embodiment, the end of the pull rod shaft 23 is connected to the two clips 11 through the connecting shaft 6, and the pull rod shaft 23 has a notch 2311 on the hole wall penetrating the connecting shaft 6, so that the pull rod shaft can be detached from the connecting shaft 6 under the action of a tensile force. The chuck assembly 1 in this embodiment comprises two clamping pieces 11, and a blocking shaft 122 is arranged between the two clamping pieces 11 in a penetrating way; the two jaws 11 switch between a closed and an open state when moving in and out of the sleeve 12. Pulling the handle 42, the tension is transmitted to the clips 11 through the pull rod shaft 23, the clips 11 shrink into the sleeve 12 under tension, and the two clips 11 are closed. A push handle 42 for transmitting a pushing force to the clip 11 through the pull rod shaft 23; the clip 11 is separated by the blocking shaft 122 to enable the two clips to open while increasing the angle at which the clips open. One end of the clamping piece 11 is bent and extended to form a clamping part 111, the other end of the clamping piece 11 is provided with a connecting part with a clamping piece connecting hole 112, and the two clamping pieces 11 are connected through a connecting shaft 6 penetrating through the clamping piece connecting hole 112. In this embodiment, two sheet-shaped clips are connected by a connecting shaft 6.

The action process of the hemostatic clip of the embodiment is as follows: the handle 42 is slidable along the handle bar 41. Pulling on the handle 42, tension is transferred to the collet assembly 1 by the pull rod shaft 23. The clip 11 is retracted under tension into the sleeve 12 and both clips are closed. Pushing the handle 42, transmitting the pushing force to the collet assembly 1 through the pull rod shaft 23; the two jaws 11 in the collet assembly 1 are separated by the blocking shaft 122 to effect jaw opening while increasing the angle at which the two jaws open. When the chuck assembly 1 needs to rotate, only the handle bar 41 is required to rotate, so as to drive the pull rod shaft 23 to rotate, and further transmit torque to the connecting piece 33, drive the sleeve 12 to rotate, thereby realizing the rotation of the chuck assembly 1. Continuing to pull the handle 42, the tail hook 111 at the tail end of the clamping piece 11 continues to shrink until entering the necking part of the sleeve 12 under the action of the pulling force of the clamping head assembly 1, and the tail hook stops at the boss 123 to realize the locking function of the clamping head. Before the locking, the clamping piece 11 can be pushed and pulled for multiple times by the pull rod shaft 23 to enter and exit the sleeve 12, namely, the repeated opening and closing of the clamping piece can be realized. When the handle 42 is pulled, the pull rod shaft 23 is separated from the notch 2311 under the pulling force from the connecting shaft 6, and the pull rod head 231 of the pull rod shaft 23 is propped against the connecting hole 332 of the connecting piece 33, so that the connecting buckle 331 is straightened and falls off, that is, the separating function of the chuck assembly 1 can be realized.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present utility model without departing from the spirit and scope of the utility model. Therefore, it is intended that the present utility model cover the modifications and variations of this utility model provided they come within the scope of the appended claims and their equivalents.

Claims

1. A hemostatic clamp is characterized by comprising a clamp head assembly (1), a conveyor (2) and a connecting assembly (3);

the chuck assembly (1) comprises a pair of clamping pieces (11) and a sleeve (12) which can be used for accommodating the clamping pieces (11) in a gathering part;

the conveyor (2) comprises a spring tube (21), a connecting sleeve (22) connected with the front end of the spring tube (21), a handle assembly (4) connected with the rear end of the spring tube (21), and a rotatable pull rod shaft (23) penetrating through the spring tube (21), wherein the front end of the pull rod shaft (23) is connected with the pair of clamping pieces (11), and the rear end of the pull rod shaft (23) is connected with the handle assembly (4);

the front end of the connecting component (3) is connected with the rear end of the sleeve (12), and the rear end of the connecting component (3) is connected with the connecting sleeve (22) and axially fixed and circumferentially rotated;

the handle assembly (4) and the pull rod shaft (23) drive the chuck assembly (1) to rotate through the connecting assembly (3), and the connecting assembly (3) can deform or break when being subjected to preset tensile force so that the chuck assembly (1) is released;

the connecting assembly (3) comprises an outer rotary cylinder (31) connected with the sleeve (12), an inner rotary cylinder (32) welded with the outer rotary cylinder (31) and a connecting piece (33) connecting the sleeve (12) and the outer rotary cylinder (31); the inner rotary cylinder (32) is sleeved in the connecting sleeve (22), and the inner rotary cylinder (32) and the connecting sleeve (22) are axially locked and circumferentially rotated; the connecting piece (33) is used for locking the sleeve (12) and the outer rotary drum (31) relatively in the axial direction and the circumferential direction; the connecting piece (33) can be deformed when a predetermined tensile force is applied, so that the sleeve (12) is separated from the outer rotary drum (31).

2. A hemostatic clip according to claim 1, wherein:

the connecting piece (33) comprises a connecting buckle (331) and a connecting hole (332), the pull rod shaft (23) passes through the connecting hole (332) to be connected with the pair of clamping pieces (11), and the pull rod shaft (23) and the connecting piece (33) are axially movable and circumferentially fixed; the sleeve is characterized in that a sleeve hole (121) is formed in the rear end of the sleeve (12), a rotary drum groove (311) is formed in the front end of the outer rotary drum (31), the sleeve (12) is sleeved at the rear end of the sleeve, the sleeve hole (121) and the rotary drum groove (311) are inserted through a connecting buckle (331), the sleeve (12) and the outer rotary drum (31) are locked relatively in the axial direction and the circumferential direction, and the connecting buckle (331) can deform when receiving preset tensile force so that the sleeve (12) and the outer rotary drum (31) are separated.

3. A hemostatic clip according to claim 2, wherein:

the front end of the pull rod shaft (23) is provided with a pull rod head (231), the pull rod shaft (23) is connected with the pair of clamping pieces (11) through the pull rod head (231), and a notch (2311) is formed in the end part of the pull rod head (231).

4. A hemostatic clip according to claim 1, wherein:

the handle assembly (4) comprises a handle rod (41) and a handle (42), the handle (42) is sleeved with the handle rod (41) and is in sliding fit with the handle rod (41), the pull rod shaft (23) penetrates through the handle rod (41) to be connected with the handle (42), and the rear end of the spring tube (21) is connected with the handle rod (41).

5. The hemostatic clip according to claim 4, wherein:

the device further comprises a screw cap (5) connected with the distal end of the handle rod (41), and the handle rod (41) and the screw cap (5) are rotatable in the circumferential direction.

6. A hemostatic clip according to claim 5, wherein:

the front end of the sleeve (12) is provided with a blocking shaft (122) extending in the radial direction, and the blocking shaft (122) is arranged between the pair of clamping pieces (11) in a penetrating way; when the sleeve (12) is moved in and out, the pair of clamping pieces (11) are switched between a closed state and an open state.

7. A hemostatic clip according to claim 1, wherein:

the connecting shaft (6) is further included, and the front end of the pull rod shaft (23) is connected with the pair of clamping pieces (11) through the connecting shaft (6).

8. A hemostatic clip according to claim 1, wherein:

tail hooks (111) protruding outwards are respectively arranged at the rear ends of the two clamping pieces (11);

two bulges (123) which radially extend to stop the tail hook (111) are arranged in the rear end of the sleeve (12);

the tail hook (111) is matched with the protrusion (123).