Clip assembly for hemostatic clip and hemostatic clip

Abstract

The present invention provides a hemostatic clip, which can close a tissue wound twice; the hemostatic clip comprises a handle assembly, a sleeve assembly and a clamp assembly; the handle assembly comprises a handle rod and a handle, and the handle is slidably sleeved on the handle rod; the sleeve assembly comprises an outer tube and two core shafts inserted in the outer tube, and the two core shafts are respectively fixed to the handle and the handle rod; the clamp assembly comprises a tightening tube, a clamping piece, a positioning pin, a pin shaft, and a splint, a positioning pin is provided at the end of the tightening tube, the clamping piece is located in the tightening tube, the positioning pin is inserted between the two clamping pieces, and the splint is fixed on the positioning pin, and the clamping piece and the splint are switched between opening and closing as the two clamping pieces enter and exit the tightening tube; a retaining spring connects the tightening tube and the outer tube, and the other end of the core shaft is connected to the clamping piece; the present invention has a simple structure, and the two clamping pieces are respectively controlled by independent handles and the splint is switched between closing and opening, and can be closed twice to clamp both sides of a large wound, and has a small size.

Description

Technical Field

[0001] The invention relates to the technical field of hemostatic clips, in particular to a clamp assembly for a hemostatic clip and the hemostatic clip. Background Art

[0002] In clinical medicine, the digestive system often suffers from digestive bleeding due to diseases, accidental injuries, and damage during treatment. Currently, commonly used hemostasis methods include injection, spraying of drugs, high-frequency electrocoagulation, laser, argon gas burning, and closing the bleeding site with hemostatic clips. Among them, closing the bleeding site with hemostatic clips has become the most effective and clinically valuable method for non-surgical treatment of digestive bleeding because of its low trauma, fast hemostasis, low incidence of rebleeding, few complications, and definite efficacy. Hemostatic clips can also close the mucosal damage of the digestive tract to a certain extent, promote wound healing, and close small fistulas in the digestive tract to avoid laparotomy.

[0003] Among the hemostatic clip products on the market, some have a very small opening after opening and cannot close large wounds; some cannot be opened again after closing, and when the chuck of the hemostatic clip is positioned incorrectly, the chuck cannot be opened and repositioned, which increases the difficulty of operation; some have poor rotation performance, and when the angle of the chuck needs to be adjusted during operation, the torque transmission performance is poor due to the structural limitations of the chuck and the conveyor, resulting in poor rotation performance and difficulty in adjustment; in addition, after the chuck is closed and released, the tail of the chuck left in the human body is too long, which can easily cause discomfort to the patient in the narrow digestive tract and there is a risk of scratching the digestive tract tissue wall, perforation, and secondary bleeding.

[0004] Therefore, there is a need for a hemostatic clip that can close large wounds and remain in the human body in a small size. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a clamp assembly and a hemostatic clamp for a hemostatic clamp, so as to solve the problem that the prior art cannot close large wounds and the size of the hemostatic clamp left in the body after closure is too large.

[0006] In order to solve the above technical problems, the present invention provides a clamp assembly for a hemostatic clip, which comprises:

[0007] A tightening tube, wherein a positioning pin is provided at the end of the tightening tube, and the other end of the tightening tube has a constricted portion whose inner diameter is smaller than the inner diameter of the tightening tube;

[0008] A clip is located in the tightening tube and can extend out of the tightening tube, the positioning pin is arranged between the two clips, one end of the clip is bent and extended to form a clamping portion, and the other end of the clip has a connecting portion with a connecting hole, the connecting hole is a long hole, and a pin shaft is arranged in the middle;

[0009] The clamping plate is fixed on the positioning pin. When the two clamping plates enter and exit the tightening tube, the inner side wall of the clamping plate has a first guide surface. The pin shaft is pushed along the axial direction of the tightening tube, which drives the clamping plate to move out of the tightening tube. The first guide surface contacts and guides the positioning pin, so that the angle between the clamping plate and the clamping plate is opened to the maximum. The pin shaft is pulled back along the axial direction of the tightening tube, which drives the clamping plate to move into the tightening tube so that the clamping plate and the clamping plate are closed. If the connecting part is continued to be pulled to move to the shrinking part, the clamping plate is axially locked.

[0010] Preferably, the outer side wall of the clip has a second guide surface, the inner wall of the tightening tube has a protruding limiting portion, and during the movement of the clip, the second guide surface contacts and guides the limiting portion.

[0011] Preferably, a raised hook portion is provided on the connecting portion, and the hook portion contacts and limits the position of the limiting portion during the movement of the clip.

[0012] Preferably, the first guide surface is a curved surface.

[0013] Preferably, the two clips are independent structures, and the opening and closing of the clips and the splints can be controlled respectively.

[0014] Preferably, a raised hook portion is provided on the connecting portion, and the necked portion has a protruding edge that cooperates with the hook portion.

[0015] The present invention also provides a hemostatic clip, which comprises: a handle assembly, a sleeve assembly, and a clamp assembly for the hemostatic clip as described in any one of the above items;

[0016] The handle assembly comprises a handle rod and two handles, and the handles are slidably sleeved on the handle rod;

[0017] The sleeve assembly comprises an outer tube and two core shafts passing through the outer tube, one end of the outer tube is connected to the nut of the handle assembly, the other end of the outer tube is connected to the tightening tube in the chuck assembly through a retaining spring, and the two are axially locked and circumferentially relatively rotated, one end of the core shaft is respectively fixedly connected to the handle, and the other end is connected to the pin shaft in the chuck assembly, and the other end of the core shaft is connected to the pin shaft. There is a breakable weak portion;

[0018] Rotating the handle rod drives the core shaft to rotate and then drives the chuck assembly to rotate; the handle, core shaft and clamp are divided into two groups, pushing and pulling the handle drives the core shaft to move axially, and then drives the clamp to move outside the tightening tube or inside the tightening tube, respectively realizing the opening and closing of the clamp and the clamp.

[0019] Preferably, the other end of the tightening tube has a clamping hole, and the end of the clamping spring has a bending portion, and the bending portion is clamped in the clamping hole.

[0020] Preferably, the outer tube is a spring tube.

[0021] As described above, the hemostatic clip of the present invention has the following beneficial effects: the present invention is a hemostatic clip that can close a large wound. When in use, the handle, the mandrel and the clip are divided into two groups. The handle is pushed and pulled to drive the mandrel to move axially. The inner side wall of the clip has a first guide surface, which contacts and guides the positioning pin, so that the angle between the clip and the splint is opened to the maximum; after clamping the tissue, the handle is pulled to pull the mandrel back along the axial direction of the tightening tube, which drives the clip to move into the tightening tube so that the clip and the splint are closed, thereby clamping the tissue on one side of the wound. The same method is used to control another group of handles, the mandrel and the clip clamp the tissue on the other side, so that one hemostatic clip can be used twice to clamp the tissue on both sides of the large wound, thereby improving the efficiency of the operation; the ordinary hemostatic clip requires a clip with a large size and length to have a sufficient width to clamp both sides of the wound, so that the size of the hemostatic clip remaining in the human body is large. The present invention can clamp the tissue twice to clamp both sides of the large wound, and the use of a small-sized clip shortens the size of the hemostatic clip remaining in the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A diagram showing an embodiment of the hemostatic clip of the present invention is shown.

[0023] Figure 2 Shown is a diagram of an embodiment of a clip in a chuck assembly.

[0024] Figure 3 Shown is a perspective schematic diagram of the chuck assembly.

[0025] Figure 4 Shown is a plan view of the chuck assembly in the open state.

[0026] Figure 5 The diagram is a plan view showing the state where the clamp assembly clamps one side of the tissue.

[0027] Figure 6 The diagram shows a plan view of the clamp assembly clamping tissues on both sides.

[0028] Figure 7 Shown is the closed state of the chuck assembly.

[0029] Figure 8 Shown is a schematic diagram of the connection between the chuck assembly and the sleeve assembly.

[0030] Fig. 9 The diagram shows the state where the pin shaft in the chuck assembly is stopped.

[0031] Fig.10 Shown is the collet assembly separated from the stretch rod in the mandrel.

[0032] Fig.11Shown is a schematic diagram of the end of a stretched rod in a mandrel.

[0033] Fig.12 The diagram shows the status where the chuck assembly is separated from the sleeve assembly.

[0034] Fig.13 Shown is a schematic diagram of the handle assembly.

[0035] Component number description

[0036] 1 Handle assembly

[0037] 11 Handle bar

[0038] 12 Handle

[0039] 13 Nut

[0040] 14 Protection tube

[0041] 2 Casing assembly

[0042] 21 Bourdon tube

[0043] 22 Connecting pipe

[0044] 23 Connector

[0045] 24 Mandrel

[0046] 241 stretch rod

[0047] 241a Weak Point

[0048] 242 Stretch Axis

[0049] 3. Chuck assembly

[0050] 31 Clip

[0051] 31a First guide surface

[0052] 31b Second guide surface

[0053] 31c Long hole

[0054] 31d Hook

[0055] 32 Tightening tube

[0056] 32a Limiting part

[0057] 32b Neck section

[0058] 32c bayonet

[0059] 32d card hole

[0060] 33 Pin

[0061] 34 Locating pin

[0062] 35 splint

[0063] 4 Circlip

[0064] 4a Bending part DETAILED DESCRIPTION

[0065] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0066] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0067] For ease of description, in this specification, the end where the handle assembly is located is called the proximal end, that is, the end close to the operator is the proximal end, and the end away from the handle assembly is called the distal end.

[0068] like Figures 1 to 13 As shown, the present invention provides a hemostatic clip, which includes: a handle assembly 1, a sleeve assembly 2, a chuck assembly 3 and a retaining spring 4. By operating the handle assembly 1, the torque and push-pull force are transmitted to the chuck assembly 3 through the sleeve assembly 2, so as to realize the rotation, repeated closing, locking and releasing functions of the hemostatic clip. A core of this embodiment is mainly to design the chuck assembly 3 of the hemostatic clip so that it can meet the requirements of having a hemostatic clip that can be clamped twice and has a small size.

[0069] like Figure 2 and Figure 7 As shown, the clamp assembly 3 for the hemostatic clamp in this embodiment includes:

[0070] A tightening tube 32, one end of which has a radially arranged positioning pin 34, and the other end of which has a constricted portion 32b whose inner diameter is smaller than the inner diameter of the tightening tube;

[0071] The clip 31 is placed in the tightening tube 32 and can extend out of the tightening tube 32. The two clips 31 are respectively placed on both sides of the positioning pin 34. The two clips 31 have a connecting portion connected by a pin shaft 33, and the hole on the connecting portion through which the pin shaft 33 is penetrated is a long hole 31c; the inner side wall of the clip 31 has a first guide surface 31a, and when the two clips 31 are opened or closed, the first guide surface 31a contacts and guides the positioning pin 34;

[0072] The clamping plate 35 is placed on the positioning pin 34. The two clamping pieces 31 are opened and closed with the clamping plate 35 during the process of entering and exiting the tightening tube 32.

[0073] See Figure 3 and Figure 4 As shown, the pin shaft 33 is pushed along the axial direction of the tightening tube 32, which drives the clamping piece to move outward from the tightening tube 32, and the first guide surface 31a contacts and guides the positioning pin 34, so that the angle between the two clamping pieces 31 and the clamping plate 35 is opened to the maximum; Figure 5 and Figure 6 As shown, the pin shaft 33 is pulled back along the axial direction of the tightening tube 32, which drives the clamping piece 31 to move into the tightening tube 32 so that the angle between the two clamping pieces 31 and the clamping plate 35 is reduced, thereby clamping the two sides of the tissue. Figure 7 As shown, if the connecting portion is continuously pulled to move into the constricted portion 32b, the chuck will be axially locked.

[0074] In this embodiment, a positioning pin 34 is provided in the tightening tube 32. Figure 3 and Figure 4 As shown, a first guide surface 31a is provided on the inner wall of the clip 31. When the clip 31 moves out of the tightening tube 32, the positioning pin 34 is always in contact with the first guide surface 31a, thereby stretching the clip 31 so that the clip 31 and the splint 35 are opened to the maximum angle, that is, the angle between the two clips and the splint can be opened to the maximum when the size of the clip is constant. The increase in the angle can enable the clip 31 to clamp more tissues, making it easier to fix with the tissues.

[0075] Preferably, the first guide surface 31a is an arc surface, or other curved surfaces or straight inclined surfaces. The first guide surfaces 31a on the two clips 31 cooperate with the positioning pins 34. When the two clips 31 extend out of the tightening tube 32, the positioning pins 34 provide the two clips 31 with a resisting force to open them to the maximum. The setting of the curved surface is more closely matched with the cylindrical surface of the positioning pin 34, reducing the corresponding friction and improving the stability of the clamp extending out of the tightening tube.

[0076] To further limit the two clips, see Figure 2 , Figure 4As shown, in this embodiment, the outer wall of the clip 31 is provided with a second guide surface 31b, and the inner wall of the tightening tube 32 is provided with a protruding limiting portion 32a. During the movement of the clip 31, the second guide surface 31b contacts and guides the limiting portion 32a. A protruding hook portion 31d is provided on the inner side of the bottom end of the connecting portion of the clip. When the protruding hook portions 31d on the two clips contact and limit the two limiting portions 32a, the angle between the two clips 31 and the clamping plate 35 is opened to the maximum. In this embodiment, the second guide surface 31b contacts and limits the two limiting portions, and cooperates with the first guide surface 31a, so that the clip 31 reciprocates in the limiting channel formed by the positioning pin 34 and the limiting portion 32a, thereby improving the stability of the clip movement and preventing the two clips 31 from being misaligned during the clamping process; in addition, the hook portion 31d contacts and limits the two clips in the axial direction, and also ensures the stability of the opening angle.

[0077] In this embodiment, the two clips 31 are independent structures and are processed separately, which facilitates the processing of the first guide surface and the second guide surface.

[0078] In order to ensure the locking of the chuck, in this embodiment, a raised hook portion 31d is provided on the connecting portion, and the neck portion 32b has a protruding edge that cooperates with the hook portion 31d. Figure 7 As shown, in this embodiment, the protruding edge constituting the necking portion 32b cooperates with the hook portion 31d, so that when the hook portion 31d is retracted to the necking portion 32b, it is stopped by the protruding edge, so that the clip is prevented from moving forward relative to the tightening tube, that is, the clamp head is prevented from opening, so that the clip and the clamp plate 35 are in a locked state. Before the clip is locked, that is, when the hook portion 31d is not retracted to the necking portion 32b, the two clips can be repeatedly opened and closed; and after locking, the clip is in a permanently closed state.

[0079] To realize the opening and closing of the clips and the clamping plates and the rotation of the clamp assembly, see Figure 1 and Figure 8 As shown, in this embodiment, the sleeve assembly includes an outer tube and a core shaft 24 inserted in the outer tube; the outer tube is welded by a spring tube 21, a connecting tube 22, and a connecting head 23; the core shaft 24 is welded by a stretching rod 241 and a stretching shaft 242; the spring tube 21 at one end of the outer tube is connected to the handle assembly 1, and the connecting head 23 at the other end of the outer tube is connected to the tightening tube in the chuck assembly 3 through a retaining ring 4; the stretching shaft 241 at one end of the core shaft 24 is connected to the handle assembly 1, and the stretching rod 241 at the other end of the core shaft 24 is connected to the pin 33 in the chuck assembly 3, and the connection between the stretching rod 241 and the pin 33 has a breakable weak portion 241a (see Fig.11 shown).

[0080] Specifically, see Figure 8 , Fig.13As shown, the handle assembly 1 in this embodiment includes a handle rod 11 and a handle 12 sleeved on the handle rod 11, the handle rod 11 is connected to the spring tube 21 of the sleeve assembly 2 through a nut 13, a protective tube 14 is provided between the sleeve assembly 2 and the nut 13, and a core shaft 24 is connected to the handle 12. In this embodiment, by pushing the handle 12 to slide along the handle rod 11, the push-pull force is transmitted to the clip 31 in the chuck assembly 3 through the core shaft 24, so as to realize the repeated closing, locking and releasing functions of the two clips and the clamping plate 35; in addition, the handle rod 11 and the handle 12 can rotate relative to the nut 13, and by rotating the handle rod 11, the torque can be transmitted to the two clips 31 in the chuck assembly 3 through the core shaft 24, so as to realize the rotation of the chuck.

[0081] See Figures 8 to 12 As shown, in this embodiment, the mandrel 24 includes a stretch rod 241 and a stretch shaft 242. One end of the stretch shaft 241 is connected to the handle assembly 1, and the other end of the stretch shaft 242 is connected to the stretch rod 241 by welding. The end of the stretch rod 241 has a connecting hole, and the above-mentioned pin 33 is inserted into the connecting hole to achieve the connection between the chuck and the mandrel. In order to facilitate the separation of the chuck and the zipper assembly, in this embodiment, the above-mentioned weak portion 241a constitutes the hole wall of the connecting hole, which can be broken by a certain pulling force, so that the pin 33 can be separated from the connecting hole.

[0082] See Figures 9 to 12 As shown, in this embodiment, the axial connection between the chuck assembly 3 and the sleeve assembly 24 is achieved through the retaining spring 4. A retaining hole 32d is provided at the other end of the tightening tube 32. The end of the retaining spring 4 has a bent portion 4a, and the bent portion 4a is clamped in the retaining hole 32d. The cooperation between the retaining hole 32d and the bent portion 4a achieves the axial connection between the sleeve assembly 2 and the chuck assembly 3, and allows the chuck assembly to rotate relative to the outer tube. When the handle assembly is pulled to separate the weak portion 241a, the stretching rod 241 continues to move and contact the retaining spring 4, so that the bent portion 4a of the retaining spring 4 is deformed under the pulling of the stretching rod 241 and detaches from the retaining hole 32d of the tightening tube 32, thereby achieving the release function of the chuck, as shown in FIG. Fig.12 shown.

[0083] The specific working process of the hemostatic clip in this embodiment can be:

[0084] Push the handle 12 to the far end, and transmit the thrust to the long hole 31c of the clip 31 through the core shaft 24. Figure 3 and Figure 4As shown, the clip 31 moves outward from the tightening tube 32 (i.e., moves toward the distal end). After the first guide surface 31a of the clip 31 contacts the cylindrical surface of the positioning pin 34, the two clips 31 continue to open outward. During the process of the two clips 31 opening outward, the second guide surfaces 31b on the two clips 31 contact the limiting portion 32a of the tightening tube 32. When the hook portion 31d contacts the limiting portion 32a, the clip 31 stops moving and is in the maximum opening angle position with the clamp 35.

[0085] The handle 12 can slide along the handle bar 11. Fig.13 As shown. Pull the handle 12 toward the proximal end, and the tension is transmitted to the pin 33 through the stretch rod 241 of the core shaft 24. The pin 33 applies the tension to the long hole 31c of the clip 31, so that the first guide surface 31a of the clip 31 contacts the surface of the positioning pin 34, and the second guide surface 31b of the clip 31 contacts the limit portion 32a, gradually shrinking into the tightening tube 32, and the two clips 31 are closed with the clamping plate 35, as shown. Figure 5 and Figure 6 shown.

[0086] The user rotates the handle rod 11 to transmit torque to the chuck assembly through the core shaft 24, which can directly drive the chuck to rotate.

[0087] Continue to pull the handle 12, and the clip 31 continues to shrink under the action of the pulling force, until it enters the necking portion 32b of the tightening tube, thereby realizing the locking function of the clip 31. Figure 7 Before the locking function is implemented, the clip and the splint can be opened and closed repeatedly by pushing and pulling the handle.

[0088] Continue to pull the handle 12, the pin 33 is stopped by the protruding edge of the bayonet portion 32c of the tightening tube 32, so that the clip 31 stops moving. Fig. 9 shown.

[0089] Continue to pull the handle 12 to break the weak part 241a of the stretch rod 241 and separate from the pin 33. Fig.10 shown.

[0090] Continue to pull the handle 12, so that the stretching rod 241 contacts the clamping spring 4, so that the bent portion 4a of the clamping spring 4 is deformed under the pulling of the stretching rod 41 and disengages from the clamping hole 32d of the tightening tube 32, thereby realizing the release function of the chuck assembly 3. Fig.12 shown.

[0091] According to the occasion of use, the handle assembly 1 needs to realize the functions of rotation and push-pull. It is necessary to design the size so that the handle assembly 1 has sufficient strength and can be conveniently rotated and pushed-pull. Its structure is not limited to the above description, and it can be other structures that can realize push-pull and rotation. The outer diameter of the sleeve assembly 2 is 0.8-3.0 mm, and the length of the part entering the endoscope clamp channel is 500-2500 mm. The sleeve assembly 2 adopts a spring structure, which can withstand coiling and bending, and can provide tensile force. The outer surface of the chuck assembly is round and smooth, and the clip 31 has excellent elasticity. At the same time, the geometric design of the appropriate bending size is carried out, so that the clip 31 can freely enter and exit the tightening tube 32. The mandrel 24 can withstand coiling and bending, has excellent synchronous rotation performance, and can smoothly transmit torque. The weak part 41a of the stretch rod 241 is designed with a dimensional geometry so that the stretch rod 241 breaks at 5-80N. The clamping spring 4 connects the chuck assembly 3 and the sleeve assembly 2, and deforms or breaks when subjected to a tensile force of 5 to 80 N, thereby releasing the chuck assembly 3.

[0092] In terms of materials, the materials of each component are all biocompatible materials. The handle component 1 is generally a composite of one or more materials such as PA, PEBAX, PE, PTFE, PP, PC, ABS, silicone, PVC, and PU. The inner and outer surfaces of the parts are smooth, realizing push-pull and rotation functions.

[0093] The outer tube 2 adopts a spring structure, which can well withstand coiling and bending and provide a certain tensile force, and the surface of the spring can be coated with a plastic film. The cross section of the spring can be circular or rectangular.

[0094] The clamp assembly 3 is generally made of medical stainless steel, nickel-titanium alloy or a composite of several materials. The clamp 31 has high elasticity and can be elastically deformed. The clamp has high hardness and can provide a strong holding force, that is, the clamp will not fall off after the clamp is locked.

[0095] The retaining spring 4 is made of medical stainless steel or nickel-titanium alloy material, and has a certain elasticity. When subjected to a certain tensile force, the bending part can be deformed or broken when a specified torque is reached, thereby implementing the function of disengaging the clamp assembly.

[0096] Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0097] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A clamp assembly for a hemostatic clip, characterized in that: include: A tightening tube, wherein a positioning pin is provided at the end of the tightening tube, and the other end of the tightening tube has a constricted portion whose inner diameter is smaller than the inner diameter of the tightening tube; A clip is located in the tightening tube and can extend out of the tightening tube, the positioning pin is arranged between the two clips, one end of the clip is bent and extended to form a clamping portion, and the other end of the clip has a connecting portion with a connecting hole, the connecting hole is a long hole, and a pin shaft is arranged in the connecting hole; The clamping plate is fixed on the positioning pin. During the process of the two clamps entering and exiting the tightening tube, the inner side wall of the clamping plate has a first guide surface. When the pin shaft is pushed along the axial direction of the tightening tube, the clamping plate is driven to move out of the tightening tube. The first guide surface contacts and guides the positioning pin, so that the angle between the clamping plate and the clamping plate is opened to the maximum. When the pin shaft is pulled back along the axial direction of the tightening tube, the clamping plate is driven to move into the tightening tube so that the clamping plate and the clamping plate are closed. If the connecting part is continued to be pulled to move to the shrinking part, the clamping plate is axially locked.

2. The clamp assembly for the hemostatic clip according to claim 1, characterized in that: The outer side wall of the clip is provided with a second guide surface, and the inner wall of the tightening tube is provided with a protruding limiting portion. During the movement of the clip, the second guide surface contacts and guides the limiting portion.

3. The clamp assembly for the hemostatic clip according to claim 2, characterized in that: The connecting portion is provided with a raised hook portion, and the hook portion contacts and limits the position of the limiting portion during the movement of the clip.

4. The clamp assembly for the hemostatic clip according to claim 1, characterized in that: The first guide surface is a curved surface.

5. The clamp assembly for the hemostatic clip according to claim 1, characterized in that: The two clips are independent structures and are respectively matched with the clamping plates.

6. The clamp assembly for the hemostatic clip according to claim 1, characterized in that: The connecting portion is provided with a raised hook portion, and the necked portion is provided with a protruding edge matched with the hook portion.

7. A hemostatic clip, characterized in that: include: A handle assembly, a sleeve assembly, and a chuck assembly for a hemostatic clip according to any one of claims 1 to 6; A handle assembly, comprising a handle rod and two handles, wherein the handles are slidably sleeved on the handle rod; The sleeve assembly comprises an outer tube and two core shafts passing through the outer tube, one end of the outer tube is connected to the nut of the handle assembly, the other end of the outer tube is connected to the tightening tube in the chuck assembly through a retaining spring, and the two are axially locked and circumferentially relatively rotated, one end of the core shaft is respectively fixedly connected to the handle, and the other end is connected to the pin shaft in the chuck assembly, and the other end of the core shaft is connected to the pin shaft. There is a breakable weak portion; Rotating the handle rod drives the core shaft to rotate and then drives the chuck assembly to rotate; pushing and pulling the handle drives the core shaft to move axially, and then drives the clamp to move outside the tightening tube or inside the tightening tube, respectively realizing the opening and closing of the clamp and the clamp.

8. The hemostatic clip according to claim 7, characterized in that: The other end of the tightening tube is provided with a clamping hole, and the end of the clamping spring is provided with a bending portion, and the bending portion is clamped in the clamping hole.

9. The hemostatic clip according to claim 7, characterized in that: The outer tube is a spring tube.

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