CN220442701U - Endoscopic hemostatic device - Google Patents

Abstract

The present utility model relates to an endoscopic hemostatic device comprising: execution of the part of the device is provided with a plurality of grooves, the executing part comprises a transmission executing part for driving the clip to move and a disengagement executing part for disengaging the clip; a control unit including: control member for facilitating user operation and a control cable connected to the control member; the flexible part is provided with a plurality of grooves, the flexible member is extended through by a control cable, the distal end of the flexible piece is provided with a second pipe fitting; the tube is tightened up and the tube is pulled up, the transmission executing part is detachably arranged; a clip, the clip proximal end being receivable in the cinch tube; the fixing piece is provided with an extension part which extends to the second pipe fitting; in the engaged configuration, the release member is limited in radial movement; in the release configuration, the fixing member and the release member are released from each other by deformation of the release member or the fixing member. The radial movement of the disengaging piece is limited by the inner wall of the second pipe fitting, so that deformation and disengagement of the disengaging piece are ensured only when axial preset tensile force is received, the structural stability of the utility model is improved, the operation risk is reduced, and the success rate of operation is improved.

Description

Endoscopic hemostatic device

Cross reference

The present application claims priority from chinese patent application CN2022104897472 filed on 7, 05, 2022, which is incorporated herein by reference in its entirety.

Technical Field

The utility model relates to an endoscopic hemostatic device which is mainly used for gastrointestinal subjects, gastric and enteroscopy interventional therapy and active bleeding therapy of non-varicose veins under an endoscope, and belongs to the technical field of minimally invasive medical instruments.

Background

The hemostatic method of the hemostatic clamp under the endoscope is characterized in that a metal clamp (titanium clamp) is fed through an endoscope pore canal, and bleeding blood vessels and focus visible by naked eyes are directly clamped. The hemostatic principle is similar to surgical vascular suturing or ligature, and belongs to a mechanical method, and the hemostatic principle does not cause coagulation, denaturation and necrosis of mucous membrane tissues. After hemostasis treatment by the metal clip, local tissues form granuloma through inflammatory process, self-fall off and are discharged out of the body through alimentary canal. The operation has the advantages of small injury, high hemostatic speed, low occurrence rate of the rebleeding, less complications, definite curative effect and the like. The existing hemostatic clamp capable of being opened and closed repeatedly is fixed through pin connection, the connecting mode is unstable, pin removal is easy, and the risk of operation can be increased due to non-subjective willingness of pin removal.

Disclosure of Invention

In order to solve the above problems, the present utility model provides an endoscopic hemostatic device that can be opened and closed repeatedly and has a stable release structure.

An endoscopic hemostatic device comprising: the device comprises an execution part, a control part, a flexible piece, a tightening pipe and a clamp; an execution unit including: the transmission executing part is used for driving the clamp to move, and the disengagement executing part is used for disengaging the clamp, the distal end of the transmission executing part is connected with the clamp, and the proximal end of the transmission executing part is connected with the control part; the disengagement execution unit includes: the fixing piece is arranged on the tightening pipe, and the disengaging piece is in releasable connection with the clip;

a control section including: a control member for facilitating user operation, and a control cable connected to the control member;

a flexible member, the flexible member being extended through by the control cable, a distal end of the flexible member being provided with a second tube;

the tightening pipe is detachably arranged on the transmission executing part;

a clip, the clip proximal end receivable in the cinch tube;

the fixing piece is provided with an extension part, and the extension part extends to the second pipe fitting; in the coupled configuration, the release member is limited in radial movement; in the release configuration, the fixing piece and the release piece are mutually released through deformation of the release piece or the fixing piece.

Preferably, the second tube member comprises a larger outer diameter section and a smaller outer diameter section, the larger outer diameter section and the smaller outer diameter section being connected by a tapered platform, the smaller outer diameter section being connected to the flexible member.

Preferably, the second tube distal inner wall is provided with a blocking table.

Preferably, the fixing member includes: the proximal end of the first pipe fitting is provided with an annular step, and the distal end of the first pipe fitting is fixedly arranged on the inner side of the tightening pipe; in the combined configuration, the annular step extends into the second pipe fitting, and the annular step is provided with a groove along the annular edge.

Preferably, the disengaging piece comprises an elastic pin, the elastic pin comprises a connecting section, wing pieces are symmetrically arranged on two sides of the connecting section, and a hook-shaped structure is arranged at the distal end of each wing piece.

Preferably, in the combined configuration, the hook-shaped structure is hooked on the far side of the groove of the fixing piece and abuts against the blocking table of the inner wall of the distal end of the second pipe fitting.

Preferably, the wing piece is sleeved with a supporting tube for supporting the transmission executing part.

Preferably, the hook-like structure is deformed or broken when subjected to a predetermined tensile force.

Preferably, the annular step deforms or breaks when subjected to a predetermined tensile force.

Preferably, the outer diameter of the annular step is slightly smaller than the inner diameter of the second pipe, and the difference between the inner diameter of the second pipe and the outer diameter of the annular step is smaller than the size of the elastic pin.

Preferably, the disengaging member includes: the clamping piece comprises a base and a plurality of hooking pieces, wherein the hooking pieces are arranged around the base, and the positions of the hooking pieces are uniformly or symmetrically distributed.

Preferably, the hooking member includes a hooking structure and a connecting structure, the hooking structure is used for clamping the annular step of the first pipe fitting, a proximal end of the connecting structure is connected to the base, and a distal end of the hooking structure is connected to the hooking structure.

Preferably, the hooking structure is deformed when subjected to a predetermined tensile force.

Preferably, the base is provided with a through hole, which is penetrated by the transmission executing part.

Preferably, two sides of the transmission executing part are provided with limiting protrusions which can be abutted against the through holes, and the limiting protrusions are located on the far sides of the through holes.

Preferably, the transmission executing part is a connecting pin, the distal end of the connecting pin is hooked, the distal end of the connecting pin is connected to the clip, and the proximal end of the connecting pin is connected to the control cable.

Preferably, the proximal end of the clip is provided with a latch, and the latch is hooked by the connecting pin; in the disengaged configuration, the distal end of the connecting pin is deformed away from the latch.

Preferably, the tightening pipe is provided with a fenestration; in the disengaged configuration, the proximal end of the clip abuts the fenestration.

The utility model comprises a transmission executing part, a fixing part, a disengaging part, a control part, a flexible part, a tightening pipe and a clamp, wherein a control cable of the control part controls the clamp to slide in the tightening pipe through the transmission executing part, the tightening pipe is provided with a proximal end of a window limiting clamp piece and is a layer of limiting structure, the transmission executing part is provided with a hook-shaped structure, and the hook-shaped structure can be preset to break or deform and is a layer of disengaging structure; the fixing piece comprises a first pipe fitting, the first pipe fitting is provided with an annular step, the disengaging piece is hooked with the annular step and abuts against a blocking table of a second pipe fitting of the flexible piece, the second pipe fitting is of a two-layer limiting structure, the transmission executing part abuts against the disengaging piece, the disengaging piece can be preset to break or deform and is of a two-layer disengaging structure, the clamp can be repeatedly opened and closed in the tightening pipe, the opportunity of repeated attempts of an operator is given, and the probability of successful operation is increased. In order to ensure the stability of the disengaging structure, the radial movement of the disengaging piece is limited by the inner wall of the second pipe fitting, so that the disengaging piece deforms and disengages only when the axial preset tensile force is received, the structural stability of the utility model is improved, the operating risk is reduced, and the success rate of the operation is improved.

Drawings

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

FIG. 2 is an enlarged partial cross-sectional view of A-a in FIG. 1;

FIG. 3 is a cross-sectional view of an actuator according to one embodiment;

FIG. 4 is a cross-sectional view of the flexure;

FIG. 5 is a side view of one embodiment of a connecting pin;

FIG. 6 is a partial schematic view of one embodiment;

FIG. 7 is a schematic view of one embodiment of a spring pin;

FIG. 8 is a schematic view of a second tube;

FIG. 9 is an installation schematic of one embodiment;

FIG. 10 is a schematic view of an annular step;

FIG. 11 is a schematic view of a detent according to one embodiment;

FIG. 12 is a side view of one embodiment of a connecting pin;

FIG. 13 is a cross-sectional view of one embodiment;

FIG. 14 is a schematic view of one embodiment;

fig. 15 is a cross-sectional view of one embodiment of the spring pin and annular step.

Reference numerals:

control portion 1000, control member 1100, finger ring 1110, slider 1120, sliding handle 1130, connector 1140, control cable 1200, flexible member 2000, support sheath 2100, sheath 2200, clip 3000, latch 3100, cinch tube 4000, stopper 4100, tube 4200, transmission actuator 5100, stopper boss 5110, disengagement actuator 5200, first tube 5210, annular step 5211, groove 5212, elastic pin 5220, connecting section 5221, wing 5222, hooked structure 5223, holding tube 5224, second tube 5230, stopper 5231, larger outer diameter section 5232, tapered platform 5233, smaller outer diameter section 5234, processed hole 5235, clip 5240, base 5241, hooking member 5242, hooking structure 5243, connecting structure 5244, through-hole 5245.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that when one component is considered to be "disposed on" another component, it may be disposed directly on the other component or may be present with an intervening component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

It should be understood that, in the description of the present application, the orientation or positional relationship indicated by the directional terms referred to are generally based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of description, and these directional terms do not indicate or imply that the apparatus or elements referred to must have a specific orientation or be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

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. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

It should be noted that "proximal" is used herein to mean the end or side closer to the operator during the operation, and is the opposite position or direction from the terms "distal", "distal"; "distal" refers to the end or side farther from the surgeon during the procedure and is the opposite position or direction from the terms "proximal" and "proximal".

Referring to fig. 1 to 13, an endoscopic hemostatic device includes an actuator, a control unit 1000, a flexible member 2000, a cinch tube 4000, and a clip 3000.

As shown in fig. 1, the control unit 1000 includes: a control 1100 for user operation and a control cable 1200.

Specifically, in one embodiment of the present utility model, the control member 1100 includes: the finger ring 1110, the finger ring 1110 may be ring-shaped, such as a ring, a rectangular ring, etc. which is convenient to pull and hold, the distal end of the finger ring 1110 is provided with a sliding piece 1120, the sliding handle 1130 is provided with a sliding groove, the sliding handle 1130 is slidably arranged on the sliding piece 1120, the distal end of the sliding piece 1120 is provided with a connecting piece 1140, and specifically, the surface of the connecting piece 1140 is provided with anti-slip lines, so that the user can hold the finger ring conveniently.

The sliding handle 1130 is connected with a control cable 1200, the control cable 1200 penetrating the connector 1140. The connector 1140 is provided with a pipe hole for the control cable 1200 to penetrate, so that the resistance of the control cable 1200 to be pulled is small. Specifically, connector 1140 is coupled to flexible element 2000, and flexible element 2000 is extended through by control cable 1200.

As shown in fig. 4, the flexible member 2000 includes: the sheath 2200, the control cable 1200 runs through the sheath 2200, the sheath 2200 is provided with an insulating layer, the sheath 2200 is made of a material with certain rigidity and toughness, the rigidity of the sheath 2200 ensures that the sheath 2200 has certain supporting force when entering the endoscope conveying pipeline, the stability of inserting the sheath 2200 is ensured, and the toughness of the sheath 2200 ensures that the sheath 2200 has certain deformability when entering the endoscope conveying pipeline.

The outer layer of the proximal end of the sheath 2200 is provided with a support shield 2100, and the support shield 2100 is connected to the connector 1140 to ensure the stability and the connection life of the flexible member 2000. The support sheath 2100 is a flexible material, which may be a high density polyethylene or the like having related characteristics.

Clip 3000, including two clamping pieces, the clamping piece proximal end is equipped with the through-hole, and bolt 3100 runs through the through-hole setting of clamping piece, and the position that bolt 3100 set up satisfies following condition, and clip 3000 moves from the biggest angle of opening to the minimum angle that clip 3000 accomodates apart from being S, tightens up the internal diameter of pipe and is R, and the length of bolt 3100 to clamping piece most proximal end is L, then L ² R is greater than or equal to R ²⁺ S ² 。

As shown in fig. 2, cinch tube 4000 may receive the proximal end of clip 3000, including: a tube 4200 and a stop 4100, the stop 4100 being disposed at a distal end of the tube 4200, the stop 4100 being configured to prevent the clip 3000 from being disengaged from the cinch tube 4000, the proximal end of the clip 3000 being disposed proximal to the stop 4100 in the assembled state. As shown in fig. 8, the blocking piece 4100 is in a raw state, the blocking piece 4100 is symmetrically disposed at two sides of the pipe 4200, specifically, the blocking piece 4100 is in a trapezoid shape, a shorter upper bottom of the blocking piece 4100 is connected with the pipe 4200, a limit edge parallel to the upper bottom is disposed at the shorter upper bottom of the trapezoid, the limit edges and the connection parts are provided with gaps, after processing, the blocking pieces 4100 are folded along the gaps, blocking beams are formed between every two blocking pieces 4100, the clip 3000 is prevented from falling off the cinch tube 4000, the requirement of reducing the material fatigue in the process is met, and the clip is better limited, so that the stability of opening and closing of the clip 3000 is ensured.

The clip is S-shaped, the tube 4200 is provided with a window 4300, when the clip 3000 is received in the cinch tube 4100, the proximal end of the clip 3000 is opened to be able to be clamped in the window 4300, the position and shape of the window 4300 are matched with the position and shape of the proximal end of the clip when the clip 3000 is received in the cinch tube 4000, and the distance N between the proximal end of the window 4300 and the distal end of the cinch tube is greater than or equal to L. The tube 4200 is provided with a machining hole for facilitating machining operations such as welding.

As shown in fig. 2, the execution unit includes: the distal end of the transmission executing portion 5100 is connected to the clip 3000 in a detachable connection manner, which will be described in more detail below, and the proximal end of the transmission executing portion 5100 is connected to the control portion 1000, specifically, the proximal end of the transmission executing portion 5100 is connected to the control cable 1200 of the control portion 100, which may be a fixed connection manner such as welding, riveting, hooking, etc., so as to ensure stability against falling off when a predetermined tensile force is applied.

As shown in fig. 5, the transmission executing portion 5100 is a connecting pin, a distal end of the connecting pin is connected to the clip 3000, the distal end of the connecting pin may be hooked to a proximal end of the clip 3000, specifically, the connecting pin is hooked to the latch 3100, and when a certain tensile force is applied, the hooked portion thereof is deformed such as to break, so as to be separated from the clip 3000. The connecting pin is made of rigid materials such as stainless steel, titanium alloy and the like, so that the rigidity of the connecting pin is ensured to be stable.

The disengagement actuator 5200 includes a securing member and a disengagement member disposed in an interference fit.

As shown in fig. 6 and 9, the first tube 5210, is fixed on the inner side of the tightening tube 4000, the fixing manner may be a fixing manner such as welding, riveting, etc., the first tube 5210 and the release member are disposed in an interference fit manner, specifically, the proximal end of the first tube 5210 is provided with an annular step 5211, the annular step 5211 is of an annular structure and coaxially disposed with the first tube 5210, specifically, the annular step 5211 is of an annular structure, and a groove 5212 is disposed along the annular edge.

As shown in fig. 9 and 10, the annular step 5211 and the first pipe 5210 may be integrally polished, or may be designed for split-type post-fixing processing, and in order to save processing cost and facilitate assembly, fixing methods such as welding and bonding are preferably used for the annular step 5211 and the first pipe 5210.

As shown in fig. 3, 6 and 8, the second tube 5230 is disposed at the distal end of the flexible member 2000, specifically, the second tube 5230 is connected to the sheath 2200, the fixing manner may be welding, riveting or the like, in this embodiment, a blocking table 5231 is disposed on the inner wall of the distal end of the second tube 5230, the blocking table 5231 abuts against the tightening tube 4000, specifically, the inner diameter of the blocking table 5231 is larger than the outer diameter of the first tube 5210 and smaller than the outer diameter of the annular step 5211. Specifically, the second tube 5230 includes a larger outer diameter section 5232 and a smaller outer diameter section 5234, with the larger outer diameter section 5232 and the smaller outer diameter section 5234 being connected by a tapered platform 5233. The proximal end is a smaller outer diameter section 5234, the smaller outer diameter section 5234 is connected to the distal end of the flexible member 2000, specifically, the smaller outer diameter section 5234 is connected to the distal end of the sheath 2200 of the flexible member 2000, and the larger outer diameter section 5232 is provided with a processing hole 5235 for the convenience of processing operation.

As shown in fig. 7, the elastic pin 5220 is accommodated in the sheath 2200 and is integrally formed by a single tube, and includes a connecting section 5221, wing members 5222 are symmetrically disposed on two sides of the connecting section 5221, and a hook-shaped structure 5223 is disposed at the distal end of the wing member 5222.

When the first tube member 5210 and the elastic pin 5220 are combined, the annular step 5211 extends into the second tube member 5230, the hook-shaped structure 5223 of the wing member 5222 is hooked on the distal side of the annular step 5211 of the first tube member 5210, the width of the groove 5212 is slightly larger than the size of the elastic pin 5220 in order to ensure the stability of the hooked state, and the outer diameter of the annular step 5211 is slightly smaller than the inner diameter of the second tube member 5230 in order to prevent the wing member 5222 from being separated from the outer side of the annular step 5211 when not receiving a predetermined tensile force. Specifically, in the assembled state, the hook-like structure 5223 and the annular step 5211, the proximal ends of the stop pieces 5210 abut against each other. The wing member 5222 at one side of the elastic pin 5220 is sleeved with a holding tube 5224 for holding the transmission actuator 5100.

The distal end of the first tube 5210 is provided with an extension portion, which includes an annular step 5211 and a portion of the first tube 5210 extending to the second tube 5230, and the second tube 5230, the extension portion, the elastic pin 5222 are mutually abutted against each other by the cooperation of the annular step 5211, the hook-shaped structure 5223 and the inner wall of the second tube 5230 in the extension portion.

In a first embodiment of a disengagement mode of the present utility model, a fixing member includes: first pipe fitting 5210, the disconnection piece includes: the elastic pin 5220 is combined, and the annular step 5211 of the first pipe member 5210, the blocking table 5231 of the second pipe member 5230 and the elastic pin 5220 are in contact with each other, wherein the hook-shaped structure 5223 of the wing member 5222 can be subjected to pipe diameter polishing and thinning, bending angle and other processing, and the material performance such as stainless steel and the like to form a separation arrangement, the fixing member and the separation member are in contact with each other and form an interference fit arrangement, and specifically, the hook-shaped structure 5223 is subjected to fracture and deformation when being subjected to preset tensile force, so that the wing member 5222 is separated from the annular step 5211, and further the tightening pipe 4000 is separated from the second pipe member 5230.

In a second embodiment of the present utility model, a fixing member includes: first pipe fitting 5210, the disconnection piece includes: the elastic pin 5220 is configured such that the annular step 5211 of the first pipe member 5210, the stopper 5231 of the second pipe member 5230, and the elastic pin 5220 are abutted against each other, wherein the annular step 5211 and the pipe wall may be subjected to fracture processing and a material having a property such as stainless steel may be formed to be separated from each other, and when the annular step 5211 is subjected to a predetermined tensile force, breakage, deformation, or the like may occur, thereby separating the annular step 5211 from the pipe wall and further separating the cinch tube 4000 from the second pipe member 5230.

The following describes alternative components of the present utility model.

The elastic pin 5220 can be replaced by a clamping piece 5240 as shown in fig. 10, the clamping piece 5240 can be contained in the second pipe 5230, the clamping piece 5240 is claw-shaped and comprises a base 5241 and a plurality of hooking pieces 5242, the hooking pieces 5242 are arranged around the base 5241, and the position and arrangement orientation of the hooking pieces 5242 ensure that when the clamping piece 5240 is subjected to axial tension, a stress point is in the axis. Preferably, the hooking member 5242 includes a hooking structure 5243 and a connecting structure 5244, wherein the hooking structure 5243 is used for clamping the annular step 5211 of the first tube 5210, and the connecting structure 5244 has a proximal end connected to the base 5241 and a distal end connected to the hooking structure 5243. The base 5241 is provided with a through hole 5245, and the connection pin is inserted into the through hole 5245.

As shown in fig. 12 and 13, in the present embodiment, the transmission executing portion 5100 adds the limit protrusions 5110 on the basis of the structure of the connecting pin, that is, the limit protrusions 5110 are disposed on two sides of the pin body of the connecting pin, specifically, in the combined configuration, the limit protrusions 5110 are located on the far side of the base 5241 of the retaining member 5240, and the radial width of the limit protrusions 5110 is greater than the radial width of the through holes 5245, so that when the connecting pin moves to the near side of the applicator by the tension of the control cable 1200 to be released, the force applied by the connecting pin to the retaining member 5240 is ensured to be sufficiently stable.

In a third embodiment of an alternative component of the present utility model, as shown in fig. 13 and as shown in fig. 14, the fixture comprises: first pipe fitting 5210 and second pipe fitting 5230, the breaking away piece includes: in the positioning member 5240, the hook connecting structure 5242 of the positioning member 5240 is hooked on the annular structure 5211 and abuts against the blocking table 5231, in this embodiment, the connecting portion between the hook connecting structure 5242 and the connecting structure 5244 can be subjected to fracture processing and can be separated by the material itself, such as stainless steel, so that when the positioning member 5240 receives a predetermined tensile force, the hook connecting structure 5242 breaks, deforms and deforms, and separates from the annular step 5211, and further separates the tightening pipe 4000 from the second pipe 5230.

The second pipe fitting 5230, the extension part and the clamping piece 5240 are mutually supported by the annular step 5211 in the extension part, the hook connecting structure 5242 and the inner wall of the second pipe fitting 5230, specifically, the gap between the inner wall of the second pipe fitting 5230 and the clamping piece 5240 is smaller than the material thickness of the clamping piece 5240, so that the clamping piece 5240 can not move in the radial direction.

The following practitioner uses the principles of operation of the endoscopic hemostatic device of the present utility model.

Clip 3000, cinch tube 4000, actuator, flexible tube 2000, and control portion 1000 are coaxially disposed, and are received within cinch tube 4000 at the proximal end of clip 3000, the operator can control the opening, closing, and detachment of the clip 3000 by pulling the sliding handle 1130 of the control portion 1000. The following describes the principle of operation of the clip 3000 from open to closed to disengaged.

When the operator pulls the sliding handle 1130 from distal to proximal, the sliding handle 1130 is pulled generally proximally, the sliding handle 1130 pulls the control cable 1200 to move in the flexible tube 2000, the control cable 1200 moves the transmission actuator 5100, and the transmission actuator 5100 further drives the clip 3000 to slide toward the cinch tube 4000 and close. At this time, the distal ends of the clips 4000 are closed by the radially inward force due to the tightening of the tube 4000 and the latch 3100, and the proximal ends of the clips are opened by the radially outward force until the proximal ends of the clips abut against the window 4300, and at this time, in the first and second embodiments, the transmission executing portion 5100 abuts against the holding tube 5224; in the third embodiment, the limiting protrusion 5110 of the transmission executing portion 5100 abuts against the base 5241 of the retaining member 5240, so as to drive the base 5241 to move proximally, the base 5241 is further subjected to an axial proximal force, and the hooking structure 5242 is further subjected to an axial proximal force.

The practitioner then pushes the sliding handle 1130 to slide from proximal to distal, the sliding handle 1130 pushes the control cable 1200 to move distally in the flexible tube 2000, the control cable 1200 drives the drive actuator 5100 to move distally, and the drive actuator 5100 in turn drives the clip 3000 to slide distally and open in the cinch tube 4000. The clip 3000 can be opened and closed repeatedly by the operator by repeating the above operations.

When the clip 3000 is disengaged, the applicator further applies a force from the distal side to the proximal side, and as the proximal end of the clip 3000 abuts against the fenestration 4300, the portion of the distal end of the connecting pin that is hooked to the latch 3100 is subjected to an axial pulling force, and when the pulling force is greater than a predetermined value, the hook portion of the connecting pin is deformed, so that the proximal end of the clip 3000 is disengaged from the connecting pin.

Meanwhile, when the clip 3000 is disengaged, in the first embodiment, the hook structure 5223 is deformed by the axial proximal pulling force and is further disengaged from the annular step 5211, so that the cinch tube 4000 is disengaged from the second tube 5230; in the second embodiment, the annular step 5211 is deformed and separated, so that the cinch tube 4000 is separated from the second tube 5230; in the third embodiment, the hook connecting structure 5243 of the retainer 5240 is deformed to separate the tightening tube 4000 from the second tube 5230.

More specifically, in the above three embodiments, during the detachment process, the force applied to the detachment member is limited by the second tube 5230 and the annular step 5211 of the fixing member, and the detachment member is limited in movement in the radial direction and can only move in the axial direction, so that the detachment stability of the device is ensured.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above embodiments represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application.

Claims (18)

1. An endoscopic hemostatic device, comprising: the device comprises an execution part, a control part, a flexible piece, a tightening pipe and a clamp;

an execution unit including: the transmission executing part is used for driving the clamp to move, and the disengagement executing part is used for disengaging the clamp, the distal end of the transmission executing part is connected with the clamp, and the proximal end of the transmission executing part is connected with the control part; the disengagement execution unit includes: the fixing piece is arranged on the tightening pipe, and the disengaging piece is in releasable connection with the clip;

a control section including: a control member for facilitating user operation, and a control cable connected to the control member;

a flexible member, the flexible member being extended through by the control cable, a distal end of the flexible member being provided with a second tube;

the tightening pipe is detachably arranged on the transmission executing part;

a clip, the clip proximal end receivable in the cinch tube;

the fixing piece is provided with an extension part, and the extension part extends to the second pipe fitting; in the coupled configuration, the release member is limited in radial movement; in the release configuration, the fixing piece and the release piece are mutually released through deformation of the release piece or the fixing piece.

2. The endoscopic hemostatic device of claim 1, wherein the second tube comprises a larger outer diameter section and a smaller outer diameter section, the larger outer diameter section and the smaller outer diameter section being connected by a tapered platform, the smaller outer diameter section being connected to the flexible member.

3. The endoscopic hemostatic device according to claim 2, wherein the second tube distal inner wall is provided with a stop.

4. An endoscopic hemostatic device according to claim 3, wherein the fastener comprises: the proximal end of the first pipe fitting is provided with an annular step, and the distal end of the first pipe fitting is fixedly arranged on the inner side of the tightening pipe; in the combined configuration, the annular step extends into the second pipe fitting, and the annular step is provided with a groove along the annular edge.

5. The endoscopic hemostatic device according to claim 4, wherein the detachment member comprises an elastic pin comprising a connection section with wing members symmetrically disposed on opposite sides thereof, and wherein the distal ends of the wing members are provided with hook-like structures.

6. The endoscopic hemostatic device according to claim 5, wherein in the coupled configuration, the hook-like structure is hooked distally of the recess of the mount and abuts the stop of the distal inner wall of the second tube member.

7. An endoscopic hemostatic device according to claim 5, wherein the wing member is sleeved with a holding tube for holding the transmission actuator.

8. The endoscopic hemostatic device according to claim 5, wherein the hook-like structure deforms or breaks when subjected to a predetermined tensile force.

9. The endoscopic hemostatic device according to claim 5, wherein the annular step deforms or breaks when subjected to a predetermined tensile force.

10. The endoscopic hemostatic device according to claim 9, wherein an outer diameter of the annular step is slightly smaller than an inner diameter of the second tube member, and wherein a difference between the inner diameter of the second tube member and the outer diameter of the annular step is smaller than a size of the elastic pin.

11. The endoscopic hemostatic device according to claim 4, wherein the detachment member comprises: the clamping piece comprises a base and a plurality of hooking pieces, wherein the hooking pieces are arranged around the base, and the positions of the hooking pieces are uniformly or symmetrically distributed.

12. The endoscopic hemostatic device according to claim 11, wherein the hooking member comprises a hooking structure for engaging the annular step of the first tube member, and a connecting structure having a proximal end connected to the base and a distal end connected to the hooking structure.

13. The endoscopic hemostatic device according to claim 12, wherein the hooking structure deforms when subjected to a predetermined pulling force.

14. An endoscopic hemostatic device according to claim 11, wherein the base is provided with a through hole therethrough by the transmission actuator.

15. The endoscopic hemostatic device according to claim 14, wherein the drive actuator is provided with stop projections on both sides thereof for abutting against the through-hole, the stop projections being located distally of the through-hole.

16. The endoscopic hemostatic device according to claim 1, wherein the transmission actuator is a connector pin having a distal end hooked, the distal end of the connector pin being connected to the clip, the proximal end of the connector pin being connected to the control cable.

17. The endoscopic hemostatic device according to claim 16, wherein the clip is provided with a latch at a proximal end thereof, the latch being hooked by the connecting pin; in the disengaged configuration, the distal end of the connecting pin is deformed away from the latch.

18. The endoscopic hemostatic device of claim 1, wherein the cinch tube is provided with a fenestration; in the disengaged configuration, the proximal end of the clip abuts the fenestration.