CN113081144A

CN113081144A - Clip device for endoscope and releasing method thereof

Info

Publication number: CN113081144A
Application number: CN202110571389.5A
Authority: CN
Inventors: 孙蕴伟; 何雄伟; 颜煜
Original assignee: Zhuji Pengtian Medical Instrument Co ltd
Current assignee: Zhuji Pengtian Medical Instrument Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-07-09

Abstract

The invention discloses a clamp device for an endoscope and a releasing method thereof. The scheme has the advantages that the part fracture does not occur all the time, no fragment is left, the separation of the clamping piece and the push-pull piece is easier and controllable, the use by a doctor is light, the release force is convenient to control, the process manufacturing is simple and reasonable, the manufacturing cost can be greatly reduced, and compared with the similar products in the market, the overall structure is simpler and more reliable.

Description

Clip device for endoscope and releasing method thereof

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a clamp device for an endoscope and a releasing method thereof.

Background

Most of push-pull pieces of the endoscope hemostatic clip in the domestic market are driven by connecting pieces or connecting rods, when the clamp part of the hemostatic clip is released, the head part of the connecting piece needs to be broken, a connecting piece hook needs to be straightened or holes on a pulling deformation clamping piece need to be pulled (such as patent documents US9084604, CN111544075 and CN110464410), the releasing force ratio needed by the structures is larger, the force of the pulling-off or the pulling deformation is difficult to control due to the material strength and the size deviation in the actual production, the force is too large, a doctor needs to use a product difficultly, even the condition that the clamp head cannot be released occurs, and the condition is a serious accident in the operation; if the force is too small, the clamping piece is broken or deformed, the clamping piece can not be closed in place and the clamp head is released easily, and the opened clamp head can be left in the body to form hidden danger.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a clamp device for an endoscope and a releasing method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a clip device for scope, includes the bourdon tube and wears to establish control line (10) in the bourdon tube, the near-end connection handle operating portion of bourdon tube and control line (10), the distal end connection clamp portion of bourdon tube and control line (10), clamp portion includes clamping piece (1) and presss from both sides tong pipe (3), and the tail end income of two clamping pieces of relative complex from top to bottom is in pressing from both sides tong pipe (3), presss from both sides tong pipe (3) through swivel (5) and install and realize dismantling the connection on swivel seat (6) of bourdon tube distal end, and clamp pipe

(3) A push-pull piece (4) is arranged in the control wire, the head part of the far end of the push-pull piece (4) is detachably connected with the clamping piece (1), and the near end of the push-pull piece (4) is fixedly connected with the far end of the control wire (10) through a connecting pipe (7); the clamping piece (1) comprises a front arm and a rear arm, the end part of the front arm is a claw end (101), the rear arm of the clamping piece (1) is connected with the front arm through an arched connecting part, the rear arm of the clamping piece (1) is provided with a strip-shaped hole (104) and a first protruding part (106), and the first protruding part (106) protrudes outwards along the vertical direction; when the arch-shaped connecting parts of the two clamping pieces (1) are accommodated in the clamp pipe (3), the two arch-shaped connecting parts are abutted up and down, the claw ends (101) of the two clamping pieces (1) are occluded up and down, and the tail ends of the two clamping pieces (1) are respectively outwards tilted up and down; the clamp pipe (3) is provided with a window (303), a stopping step or a stopping groove for buckling a first convex part (106) at the tail end of the clamping piece (1); the push-pull piece (4) is provided with two push-pull parts (401) which are respectively arranged in the strip-shaped holes (104) of the two clamping pieces (1) in a penetrating way, the outer diameters of the two push-pull parts (401) of the push-pull piece (4) are smaller than the inner diameter of the clamp pipe (3), and when the first bulge parts (106) at the tail ends of the two clamping pieces (1) which are contained in the clamp pipe (3) abut against the inner side wall of the clamp pipe (3), the maximum distance between the near ends of the strip-shaped holes (104) of the two clamping pieces (1) is smaller than the maximum distance between the near ends of the push-pull piece (

(4) The outer diameter of the two push-pull parts (401) is smaller than the outer diameter of the two push-pull parts (401), so that the push-pull parts (401) of the push-pull piece (4) cannot be pulled out of the strip-shaped holes (104) of the clamping piece (1); when the first protruding parts (106) at the tail ends of the two clamping pieces (1) are clamped into the windowing part (303) and the stopping step or the stopping groove, the maximum distance between the near ends of the strip-shaped holes (104) of the two clamping pieces (1) is greater than the outer diameters of the two push-pull parts (401) of the push-pull part (4), so that the push-pull parts (401) of the push-pull part (4) can be separated from the strip-shaped holes (104) of the clamping pieces (1).

Preferably, the tail ends of the two clamping pieces (1) which are contained in the clamping tube (3) are limited by a limiting pin (2) or a blocking piece part which is arranged at the far end of the clamping tube (3).

Preferably, the clamping piece (1) is made of an elastic metal sheet, shoulders (102) are arranged on two wings of the front arm of the clamping piece (1), the claw ends (101) are in a sawtooth shape, and the two claw ends (101) are mutually occluded when the two clamping pieces (1) are clamped; and reinforcing ribs (103) are formed on the front arm and the arch-shaped connecting part of the clamping piece (1).

Preferably, the rear arm of the clamping piece (1) is provided with a second protruding part (105), and the second protruding part (105) protrudes outwards along the left-right direction and is matched with the inner side wall of the clamp pipe (3) to limit the radial movement of the rear arm of the clamping piece (1).

Preferably, the far end of the clamping tube (3) is provided with a limit pin hole (301) for installing the limit pin (2), and the clamping tube (3) is provided with a window (303) for buckling a first bulge (106) at the tail end of the clamping piece (1) at a position close to the near end of the clamping tube.

Preferably, the proximal end of the clamp tube (3) is provided with a third bulge part (302) which bulges inwards; the rotating ring (5) is provided with a far end flange (501) and a near end flange (502), the far end flange (501) and the near end flange (502) are both annular, a thin neck part (502) with a smaller outer diameter is formed between the far end flange (501) and the near end flange (502), and the rotating ring (5) is provided with a shaft hole for penetrating through the push-pull piece (4) and/or the connecting pipe (7); a proximal end flange of the swivel (5)

(502) Is retained in the swivel seat (6), the distal flange (501) is received in the clamp tube (3) and retained by the third boss (302) to restrict its escape, the outer diameter of the distal flange (501) is smaller than that of the proximal flange (502), and the distal flange (501) can be received in the swivel seat (6).

Preferably, the clamping pipe and the clamping piece are both made of metal blanking pieces, and the protruding parts on the clamping pipe and the clamping piece are formed by bending.

Preferably, a groove (402) for accommodating the two clamping pieces (1) is formed between the two push-pull parts (401), and a slope facilitating the push-pull parts (401) to be pulled out from the strip-shaped holes (104) is formed on one side, close to the rotating ring (5), of the push-pull parts (401).

Preferably, a limiting pipe (9) is fixed on the far end of the connecting pipe (7), the push-pull piece (4) or the control line (10), the push-pull part (401) and the limiting pipe (9) are respectively positioned on the front side and the rear side of the rotating ring (5), and the outer diameter of the limiting pipe (9) is larger than the bore diameter of the shaft hole of the rotating ring (5), so that the limiting pipe (9) forms a limiting relation on the rotating ring (5).

A releasing method of a clip device for an endoscope comprises the steps of operating a handle operation part at a near end, driving a push-pull piece (4) at a far end to move through a control line (10) to realize the closing and releasing of a clip part, when the push-pull piece (4) moves backwards, enabling a first convex part (106) at the tail end of two clips (1) to abut against the inner side wall of a clip tube (3) so as to limit the tilting range of the tail end of the two clips (1), enabling the maximum distance of the near end of a strip-shaped hole (104) of the two clips (1) to be smaller than the outer diameter of two push-pull parts (401) of the push-pull piece (4), enabling the push-pull piece (4) to pull the two clips (1) to move backwards, enabling an arched connecting part of the two clips (1) to be contained in the clip tube (3), and enabling the two clips (1) to be tightly closed when the tail end of the two clips (1) moves to a window opening (303), a stopping groove or a stopping, the first protrusion (106) is clamped into the window (303), the stopping groove or the stopping step so as to fix the positions of the two clamping pieces (1) and the clamping pipe (3), and therefore the tilting range of the tail ends of the two clamping pieces (1) is increased, the maximum distance of the near ends of the strip-shaped holes (104) of the two clamping pieces (1) is larger than the outer diameter of the two push-pull parts (401) of the push-pull part (4), the push-pull part (4) is continuously pulled backwards, the push-pull part (401) of the push-pull part (4) is withdrawn from the strip-shaped holes (104) of the two clamping pieces (1) to realize the separation of the push-pull part (4) and the clamping pieces (1), the push-pull part (4) drives the rotating ring (5) to move backwards, the far-end flange (501) of the rotating ring (5) enables the third bulge (302) on the clamp pipe (3) to deform, thereby the connection between the clamp pipe (3) and the rotary ring (5) is failed, and the release and the separation of the clamp part are realized.

By adopting the technical scheme, in the release process of the clamp part, the part is not broken from beginning to end, no fragment is left, the push-pull part is matched with the strip-shaped holes before and after the clamp part is tilted, so that the clamping piece is separated from the push-pull part more easily and controllably, a doctor can use the clamp conveniently, the release force is conveniently controlled, the process is simple and reasonable to manufacture, the manufacturing cost can be greatly reduced, and compared with similar products in the market, the clamp part is simpler in overall structure and higher in reliability.

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 not to limit the application.

FIG. 1 is a cross-sectional view of a clip device of the present invention (with the operating portion omitted);

FIG. 2 is a perspective view of the clip device of the present invention (with the operating portion omitted);

FIG. 3 is a schematic view of the push-pull configuration of the clamping mechanism of the present invention;

FIG. 4 is a schematic view of a clip;

FIG. 5 is a schematic structural view of a clamp tube;

FIG. 6 is a schematic structural view of the push-pull member and the rotary ring;

FIG. 7 is a schematic view of the open state of the clamping device of the present invention;

FIG. 8 is a schematic view of the push-pull configuration of the clamp device of the present invention in an open position;

FIG. 9 is a schematic view of the closed state of the clamping device of the present invention;

FIG. 10 is a schematic view of the push-pull configuration of the present invention with the clamping mechanism closed;

FIG. 11 is a schematic view of the clamp device of the present invention after release of the clamp tube;

wherein, 1, a clamping piece; 2. a spacing pin; 3. clamping the pipe; 4. a push-pull member; 5. rotating the ring; 6. a swivel seat; 7. a connecting pipe; 8. a bellows; 9. a limiting pipe; 10. a control line; 11. and (5) coating a plastic spring tube.

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.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, the singular is also intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the features, steps, operations, devices, components, and/or combinations thereof.

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 used only for convenience of description and simplicity of description, and 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, are not to 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 implicitly indicating 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 expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, 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 1:

as shown in fig. 1 to 3, the clip device for endoscope comprises a plastic-coated spring tube 11 and a control wire 10 passing through the plastic-coated spring tube 11, wherein the proximal ends of the plastic-coated spring tube 11 and the control wire 10 are connected with a handle operating part (not shown), and the distal ends of the plastic-coated spring tube 11 and the control wire 10 are connected with a clip part. The structure of the handle operation part is not the innovation of the invention, and patent documents with publication numbers of US9084604, CN111544075, CN110464410 and the like can be referred to. A common handle operating part includes a handle and a sliding knob that can slide on the handle, the sliding knob being connected to a proximal end of the control wire 10 so as to push or pull the control wire 10 by moving the sliding knob. The distal end of the plastic-coated spring tube 11 is typically provided with a bellows 8 (a type of spring tube) to facilitate the placement of the clamp portion, which will also be referred to collectively in the art as a spring tube.

The clamp comprises a clamp part and a clamp tube 3, wherein a limiting pin 2 is installed at the far end of the clamp tube 3, the near ends of two oppositely arranged clamp pieces 1 are accommodated in the far end of the clamp tube 3 and limited by the limiting pin 2, the near ends of the clamp tube 3 are detachably connected with a swivel seat 6 installed at the far end of a plastic-coated spring tube 11 through a swivel 5, a push-pull piece 4 is arranged in the clamp tube 3, the far end head of the push-pull piece 4 is detachably connected with the near end of the clamp piece 1, the swivel 5 is sleeved on the push-pull piece 4, and the near end of the push-pull piece 4 is fixedly connected with the far end of a control line 10 through a connecting pipe 7.

In this embodiment, as shown in fig. 4, the clip 1 is made of an elastic metal sheet and includes a front arm and a rear arm, the end of the front arm is a claw end 101, shoulders 102 are disposed on two wings of the front arm, the claw end 101 is in a zigzag shape, and when the two clips 1 are clamped, the two claw ends 101 are engaged with each other, the rear arm of the clip 1 is connected with the front arm through an arch-shaped connecting portion, the rear arm of the clip 1 is provided with a strip-shaped hole 104 and a first protrusion 106, the first protrusion 106 protrudes outward in an up-down direction, and the two clips 1 which are matched with each other are arranged up and down oppositely; when the arch connecting parts of the two clamping pieces 1 are accommodated in the clamp pipe 3, the two arch connecting parts are abutted up and down, the claw ends 101 of the two clamping pieces 1 are occluded up and down, and the tail ends of the two clamping pieces 1 are respectively outwards tilted up and down and fixed with steps or windows on the side wall of the clamp pipe 3. The axis line closer to the clamp tube 3 is the inside, and the axis line farther from the clamp tube 3 is the outside.

In this embodiment, the rear arm of the clip 1 is provided with the second protrusion 105, and the second protrusion 105 protrudes outward in the left-right direction, so that when the rear arm of the clip 1 moves in the clamp tube 3, the first protrusion 106 at the tail end of the clip 1 can be limited by the second protrusion 105 to generate unnecessary radial displacement or rotation, so as to ensure that the clip 1 is accurately positioned and fixed with the step or window on the side wall of the clamp tube 3. In this embodiment, the front arm and the arch connecting portion of the clip 1 are formed with reinforcing ribs 103 to increase the strength thereof.

In this embodiment, as shown in fig. 5, the distal end of the clamping tube 3 is provided with a limiting pin hole 301 for installing the limiting pin 2, the proximal end of the clamping tube 3 is provided with a third protrusion 302 protruding inward, and the clamping tube 3 is provided with a window 303 near the proximal end for the first protrusion 106 at the tail end of the clip 1 to be fastened. In other embodiments, the stop pin 2 can also be replaced by a blocking piece part on the clamp tube 3 in other embodiments, that is, blocking pieces are arranged at both sides of the distal end of the clamp tube, and the blocking pieces at both sides are bent inwards to form blocking piece parts so as to prevent the clip from being pulled out from the distal end of the clamp tube. In other embodiments, the window 303 may be replaced by a stop step or a stop groove on the inner side wall of the clamp tube 3, which would require a larger wall thickness of the clamp tube and a wide enough step or a deep enough groove, or would cause buckling failure.

In this embodiment, the pipe and the clamping piece of the clamp are made of metal blanking pieces, and the protruding portions of the pipe and the clamping piece of the clamp are formed by bending.

In this embodiment, as shown in fig. 1 and 6, the push-pull member 4 has two push-pull portions 401 respectively inserted into the strip-shaped holes 104 of the two clip pieces 1. In a preferred embodiment, a groove 402 is formed between the two push-pull portions 401 to facilitate the two clips 1 to be received therein when they are pushed to improve pushing stability and reliability. In a preferred embodiment, the side of the push-pull portion 401 close to the swivel 5 is formed with a slope so that when the tail ends of the two clamping pieces 1 tilt outward, the two push-pull portions 401 can be stably and reliably pulled out from the strip-shaped holes 104 of the two clamping pieces 1.

In this embodiment, the outer diameters of the two push-pull portions 401 of the push-pull member 4 are smaller than the inner diameter of the clamping tube 3, and when the first protrusions 106 at the tail ends of the two clamping pieces 1 received in the clamping tube 3 abut against the inner side wall of the clamping tube 3, the outer diameters of the two push-pull portions 401 of the push-pull member 4 are larger than the maximum distance between the proximal ends of the strip holes 104 of the two clamping pieces 1, so that the push-pull portions 401 of the push-pull member 4 cannot be pulled out of the strip holes 104 of the clamping pieces 1; when the first protrusions 106 at the tail ends of the two clips 1 are clamped into the window 303, the stopping groove or the stopping step, the maximum distance between the proximal ends of the strip-shaped holes 104 of the two clips 1 is greater than the outer diameters of the two push-pull parts 401 of the push-pull piece 4, so that the push-pull parts 401 of the push-pull piece 4 can be pulled out of the strip-shaped holes 104 of the clips 1.

In this embodiment, the swivel 5 has a distal flange 501 and a proximal flange 502, the distal flange 501 and the proximal flange 502 are both annular, and a thin neck 502 with a smaller outer diameter is formed between the distal flange 501 and the proximal flange 502; the rotating ring 5 is provided with a shaft hole for penetrating the near end of the push-pull piece 4 and/or the connecting pipe 7. The proximal flange 502 of the swivel 5 is captured in the swivel seat 6, the distal flange 501 is received in the proximal end of the clamp tube 3 and captured by the third boss 302 to limit its backing out, the outer diameter of the distal flange 501 is smaller than the outer diameter of the proximal flange 502, and the distal flange 501 can be received in the swivel seat 6. Like this, the clamp pipe 3 can radially rotate for swivel seat 6 and bellows 8 through swivel 5 to the swivel can be better carry out radial activity spacing to the push-and-pull piece, makes the push-and-pull piece only can be for swivel seat axial activity, thereby improves the reliability of being connected and releasing of push-and-pull piece and clamping piece.

In this embodiment, the connecting tube 7 is fixed with a limiting tube 9, and the outer diameter of the limiting tube 9 is larger than the bore diameter of the shaft hole of the rotating ring 5, so that the limiting tube 9 limits the rotating ring 5. In other embodiments, the limiting tube 9 may also be fixed on the proximal end of the push-pull member 4 or the distal end of the control wire 10, or may be fixed at the joint of the push-pull member 4 and the connecting tube 7, or at the joint of the connecting tube 7 and the control wire 10.

A method of releasing a clip device for an endoscope, comprising:

the handle operation part at the near end of the operation instrument drives the push-pull part 4 at the far end of the operation instrument to move through a control line 10 so as to realize the opening or closing of the clamping pieces, and the two push-pull parts 401 of the push-pull part 4 are respectively inserted into the strip-shaped holes 104 of the two clamping pieces 1; when the push-pull piece 4 moves forwards, the arched connecting parts of the two clamping pieces 1 are pushed out of the clamping pipe 3, the two clamping pieces 1 are opened, and as shown in fig. 7 and 8, the movable ranges of the clamping pieces 1 and the push-pull piece 4 are limited by the limiting pin 2 and the limiting pipe 9, so that the opening angles and ranges of the two clamping pieces 1 can be limited; when the push-pull member 4 moves backwards, the first protrusions 106 at the tail ends of the two clamping pieces 1 abut against the inner side wall of the clamping tube 3 to limit the tilting range of the tail ends of the two clamping pieces 1, so that the maximum distance between the proximal ends of the strip-shaped holes 104 of the two clamping pieces 1 is smaller than the outer diameter of the two push-pull portions 401 of the push-pull member 4, therefore, the push-pull member 4 can pull the two clamping pieces 1 to move backwards, thereby accommodating the arched connecting portions of the two clamping pieces 1 into the clamping tube 3, as shown in fig. 9 and 10, when the tail ends of the two clamping pieces 1 move to the position of the opening 303, the stopping groove or the stopping step of the clamping tube 3, the two clamping pieces 1 are clamped and closed, the first protrusions 106 are clamped into the opening 303, the stopping groove or the stopping step, thereby fixing the positions of the two clamping pieces 1 and the clamping tube 3, and therefore, the tilting range of the tail ends of the two clamping pieces 1 is increased, so that the maximum distance between the proximal ends of the, the push-pull piece 4 is continuously pulled backwards, the push-pull part 401 of the push-pull piece 4 exits from the strip-shaped holes 104 of the two clamping pieces 1, separation of the push-pull piece 4 and the clamping pieces 1 is achieved, the push-pull piece 4 is continuously pulled backwards, the push-pull piece 4 drives the rotary ring 5 to move backwards, the third protruding part 302 on the clamping tube 3 is deformed by the flange 501 at the far end of the rotary ring 5, and therefore connection between the clamping tube 3 and the rotary ring 5 fails, and release separation of the clamping parts is achieved, as shown in fig. 11. Like this, in the release process of clamp portion, not take place the part fracture from beginning to end, no piece remains to adopt push-and-pull portion and the cooperation of strip-shaped hole before and after the perk to make the separation of clamping piece and push-and-pull piece easier and controllable. The novel clamp part releasing structure is convenient for doctors to use, convenient for controlling the releasing force, simple and reasonable in process manufacturing, and capable of greatly reducing the manufacturing cost, and compared with like products on the market, the novel clamp part releasing structure is simpler in overall structure and higher in reliability.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "one implementation," "a specific implementation," "other implementations," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment, implementation, or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described above may also be combined in any suitable manner in any one or more of the embodiments, examples, or examples. The invention also includes any one or more of the specific features, structures, materials, or characteristics described above, taken alone or in combination.

Although the embodiments of the present invention have been shown and described, it is understood that the embodiments are illustrative and not restrictive, and that those skilled in the art can make changes, modifications, substitutions, variations, deletions, additions or rearrangements of features and elements within the scope of the invention without departing from the spirit and scope of the invention.

Claims

1. A clip device for an endoscope comprises a spring tube and a control wire (10) arranged in the spring tube in a penetrating mode, the near ends of the spring tube and the control wire (10) are connected with a handle operating part, the far ends of the spring tube and the control wire (10) are connected with a clamping part, the clamping part comprises clamping pieces (1) and a clamping tube (3), the tail ends of the two clamping pieces (1) which are matched with each other up and down are contained in the clamping tube (3), the clamping tube (3) is detachably connected with a rotating ring seat (6) arranged at the far end of the spring tube through a rotating ring (5), a push-pull piece (4) is arranged in the clamping tube (3), the head part at the far end of the push-pull piece (4) is detachably connected with the clamping pieces (1), and the near end of the push-pull piece (4) is fixedly connected with the far end of the control wire (10) through; the clamping piece is characterized in that the clamping piece (1) comprises a front arm and a rear arm, the end part of the front arm is a claw end (101), the rear arm of the clamping piece (1) is connected with the front arm through an arched connecting part, the rear arm of the clamping piece (1) is provided with a strip-shaped hole (104) and a first protruding part (106), and the first protruding part (106) protrudes outwards along the vertical direction; when the arch-shaped connecting parts of the two clamping pieces (1) are accommodated in the clamp pipe (3), the two arch-shaped connecting parts are abutted up and down, the claw ends (101) of the two clamping pieces (1) are occluded up and down, and the tail ends of the two clamping pieces (1) are respectively outwards tilted up and down; the clamp pipe (3) is provided with a window (303), a stopping step or a stopping groove for buckling a first convex part (106) at the tail end of the clamping piece (1); the push-pull piece (4) is provided with two push-pull parts (401) which are respectively arranged in the strip-shaped holes (104) of the two clamping pieces (1) in a penetrating mode, the outer diameters of the two push-pull parts (401) of the push-pull piece (4) are smaller than the inner diameter of the clamp pipe (3), and when the first protruding parts (106) at the tail ends of the two clamping pieces (1) which are contained in the clamp pipe (3) abut against the inner side wall of the clamp pipe (3), the push-pull parts (401) of the push-pull piece (4) cannot be separated from the strip-shaped holes (104) of the two clamping pieces (1); when the first convex parts (106) at the tail ends of the two clamping pieces (1) are clamped into the windowing part (303), the stopping step or the stopping groove, the push-pull parts (401) of the push-pull pieces (4) can be pulled out from the strip-shaped holes (104) of the two clamping pieces (1).

2. A clip device for an endoscope, according to claim 1, characterized in that the tail ends of said two clips (1) received in said tube (3) are retained by a retaining pin (2) or a catch portion provided at the distal end of said tube (3).

3. A clip device for endoscope, according to claim 1, characterized in that said clip piece (1) is made of elastic metal sheet, the two wings of the forearm of said clip piece (1) are provided with shoulders (102), said claw ends (101) are saw-toothed, and the two claw ends (101) are engaged with each other when the two clip pieces (1) are clamped; and reinforcing ribs (103) are formed on the front arm and the arch-shaped connecting part of the clamping piece (1).

4. A clip device for an endoscope, according to claim 1, characterized in that said clip (1) is provided with a second protrusion (105) on the rear arm, said second protrusion (105) protrudes outward in the left-right direction and cooperates with the inner sidewall of said clip tube (3) to limit the radial movement of the rear arm of said clip (1).

5. A clip device for endoscope, according to claim 1, characterized in that the distal end of said clip tube (3) is provided with a stop pin hole (301) for mounting a stop pin (2), and the clip tube (3) is provided with a window (303) near its proximal end for fastening the first protrusion (106) at the tail end of the clip (1).

6. A clip device for an endoscope, according to claim 1, characterized in that said proximal end of said clip tube (3) is provided with a third inwardly projecting protrusion (302); the rotating ring (5) is provided with a far end flange (501) and a near end flange (502), the far end flange (501) and the near end flange (502) are both annular, a thin neck part (502) with a smaller outer diameter is formed between the far end flange (501) and the near end flange (502), and the rotating ring (5) is provided with a shaft hole for penetrating through the push-pull piece (4) and/or the connecting pipe (7); the proximal flange (502) of the swivel (5) is limited in the swivel seat (6), the distal flange (501) is received in the clamp tube (3) and limited by the third boss (302) to limit the escape thereof, the outer diameter of the distal flange (501) is smaller than that of the proximal flange (502), and the distal flange (501) can be received in the swivel seat (6).

7. A clip unit for an endoscope, according to claim 1, wherein said clip tube and said clip are made of a metallic blanking member, and said projections on said clip tube and said clip are formed by bending.

8. A clip device for an endoscope, according to claim 1, characterized in that a groove (402) for receiving two clip pieces (1) is formed between said two push-pull portions (401), and a slope for facilitating the push-pull portion (401) to be released from the strip-shaped hole (104) is formed on one side of the push-pull portion (401) close to the swivel (5).

9. A clip device for an endoscope, according to claim 1, characterized in that a limiting tube (9) is fixed to the distal end of said connecting tube (7), said push-pull member (4) or said control wire (10), said push-pull portion (401) and said limiting tube (9) are respectively located at the front and rear sides of said rotary ring (5), the outer diameter of said limiting tube (9) is larger than the bore diameter of the axial hole of said rotary ring (5), so that said limiting tube (9) forms a limiting relationship with said rotary ring (5).

10. A method for releasing a clip device for an endoscope according to any one of claims 1 to 9, wherein a proximal handle operation portion is operated to move a distal push-pull member (4) through a control wire (10) to close and release the clip portion, wherein when the push-pull member (4) moves backward, a first protrusion (106) at the tail end of the two clip pieces (1) abuts against the inner side wall of the clip tube (3) to limit the tilting range of the tail end of the two clip pieces (1), so that the maximum distance between the proximal ends of the strip-shaped holes (104) of the two clip pieces (1) is smaller than the outer diameter of the two push-pull portions (401) of the push-pull member (4), and thus the push-pull member (4) pulls the two clip pieces (1) to move backward to store the arched connection portions of the two clip pieces (1) into the clip tube (3), and when the tail end of the two clip pieces (1) moves to the open window (303) of the clip tube (3), When the groove or the stopping step is stopped, the two clamping pieces (1) are clamped and closed, the first bulge (106) is clamped into the windowing (303), the groove or the stopping step is stopped, so that the positions of the two clamping pieces (1) and the clamping tube (3) are fixed, the tilting range of the tail ends of the two clamping pieces (1) is increased, the maximum distance between the near ends of the strip-shaped holes (104) of the two clamping pieces (1) is larger than the outer diameters of the two push-pull parts (401) of the push-pull part (4), the push-pull part (4) is continuously pulled backwards, the push-pull part (401) of the push-pull part (4) is withdrawn from the strip-shaped holes (104) of the two clamping pieces (1), the separation of the push-pull part (4) and the clamping pieces (1) is realized, the push-pull part (4) drives the rotating ring (5) to move backwards, the far-end flange (501) of the rotating ring (5) enables the third bulge (302) on the clamping tube (3) to deform, so that the failed connection between the clamping tube (3, the release and separation of the clamping parts are realized.