A hemostatic clip

Abstract

The present invention discloses a hemostatic clip, belonging to the technical field of medical devices. The hemostatic clip comprises an inner sleeve, a transition inner sleeve, a micro steel ball, a clip seat, a ball head pull rod and a clip. The ball head pull rod is sleeved in the transition inner sleeve, the transition inner sleeve is sleeved in the inner sleeve, the inner sleeve is restricted between the transition inner sleeve and the clip seat, and the micro steel ball is clamped between the clip seat and the transition inner sleeve; the micro steel ball is fixed to the clip seat; by pulling the ball head pull rod, the transition inner sleeve is driven to move backward, so that the front end of the transition inner sleeve is deformed, thereby separating from the micro steel ball and the clip seat. The above-mentioned hemostatic clip realizes the connection and separation of the clip seat and the transition inner sleeve through the micro steel ball, has a simple structure, is easy to operate, and has high operational reliability.

Description

Technical Field

[0001] The invention relates to a hemostatic clip and belongs to the technical field of medical devices. Background Art

[0002] Endoscopic metal clip hemostasis is one of the most widely used hemostatic methods. The use of metal clips can effectively stop bleeding and prevent rebleeding, reduce adverse reactions, and greatly improve the safety and cure rate of endoscopic treatment of gastrointestinal bleeding. The hemostatic mechanism of metal hemostatic clips is the same as surgical vascular ligation or suture. It is a physical and mechanical method that uses the mechanical force generated when the hemostatic clip is closed to ligate the surrounding tissues and bleeding blood vessels, thereby closing the bleeding blood vessels to block blood flow and achieve the purpose of hemostasis. It is suitable for hemostatic treatment of non-varicose active bleeding and visible vascular stump lesions.

[0003] China's utility model patent No. CN201921932299.9, entitled "A Hemostatic Clip", introduces a hemostatic clip that uses a ball head pull rod to open and close two clips, and cooperates with the ball head pull rod, plastic sleeve and steel sleeve to separate the clamping part at the front end of the hemostatic clip and the control part at the rear end. The structure is connected by an interference fit, but since the clamp seat and the plastic sleeve need to be fixed with glue, the operation is difficult during the actual processing process and it is easy to stick to the steel sleeve. It is difficult to pull the ball head pull rod, and since the plastic sleeve and the steel sleeve will be bonded together, excessive force may cause the ball head pull rod to break, making it impossible to separate from the clamp, resulting in a low yield rate.

[0004] Therefore, in order to facilitate the operation of doctors, a hemostatic clip is needed, which can save effort and conveniently separate the hemostatic clip. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a hemostatic clip.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] A hemostatic clip comprises an inner sleeve, a transition inner sleeve, a plurality of miniature steel balls, a clip seat, a ball head pull rod and two clips, wherein the ball head pull rod is sleeved in the transition inner sleeve, the transition inner sleeve is sleeved in the inner sleeve, the inner sleeve is restricted between the transition inner sleeve and the clip seat, and the miniature steel balls are sandwiched between the clip seat and the transition inner sleeve;

[0008] The micro steel ball is fixed to the clamp seat; by pulling the ball head pull rod, the transition inner sleeve is driven to move backward, so that the front end of the transition inner sleeve is deformed, thereby separating from the micro steel ball and the clamp seat.

[0009] Preferably, a round hole is opened on the clamp seat, the micro steel ball is fixed to the round hole and the micro steel ball protrudes from the inner wall of the clamp seat.

[0010] In a preferred embodiment provided by the present invention, the transition inner sleeve includes a groove, which is arranged at the upper end of the transition inner sleeve and is used to accommodate the micro steel ball together with the circular hole.

[0011] Preferably, the ball head pull rod includes a coaxially arranged ball head, a pull rod, a first connecting tube and a second connecting tube, the ball head is arranged at the upper end of the pull rod, and the ball head is connected to the clip; the lower end of the pull rod is connected to the upper end of the first connecting tube, and the lower end of the first connecting tube is inserted into the upper end of the second connecting tube; the first connecting tube is arranged in the transition inner sleeve, and the second connecting tube is placed outside the lower end of the transition inner sleeve.

[0012] In another preferred embodiment provided by the present invention, the transition inner sleeve includes a plurality of hemispherical pits, and the hemispherical pits are arranged at the upper end of the transition inner sleeve for accommodating the micro steel balls together with the circular holes.

[0013] Preferably, the ball head pull rod comprises a coaxially arranged ball head, a pull rod, a first connecting tube, a second connecting tube and a rotating portion, wherein the ball head is arranged at the upper end of the pull rod, and the ball head is connected to the clip; the lower end of the pull rod is connected to the upper end of the first connecting tube, and a rotating portion is arranged between the first connecting tube and the second connecting tube;

[0014] A rotating gasket is fixed to the lower end of the transition inner sleeve, and the rotating gasket includes a connecting groove. The shape of the connecting groove matches the shape and size of the rotating part. The shape of the rotating part allows the ball head pull rod to move freely along the axial direction in the transition inner sleeve, and also drives the transition inner sleeve to rotate when the ball head pull rod rotates.

[0015] Preferably, the cross section of the rotating portion is non-circular, and the maximum radial dimension of the rotating portion is smaller than the inner diameters of the first connecting pipe and the second connecting pipe;

[0016] The rotating gasket comprises a non-circular connecting groove for connecting with a portion of the middle portion of the pull rod having a non-circular cross section.

[0017] Preferably, the inner sleeve is a three-section sleeve that is larger in the middle and smaller at both ends, and the outer diameter of the upper end of the inner sleeve and the outer diameter of the lower end of the inner sleeve are both smaller than the outer diameter of the middle part; the upper end of the inner sleeve is inserted into the clamp seat.

[0018] Preferably, a boss is provided at the lower end of the transition inner sleeve, and the outer diameter of the boss is equal to the outer diameter of the lower end of the inner sleeve.

[0019] Preferably, the hemostatic clip also includes a spring tube, a pull cable and a control handle, the lower end of the inner sleeve is connected to the spring tube, the upper end of the pull cable is connected to the lower end of the ball head pull rod, and the lower end of the pull cable and the lower end of the spring tube are connected to the control handle.

[0020] The hemostatic clip provided by the present invention realizes the connection between the clip seat and the transition inner sleeve by means of a micro steel ball, and by pulling a cable, the front end of the transition inner sleeve is deformed, thereby realizing the separation of the transition inner sleeve, the micro steel ball and the clip seat; during assembly, the micro steel ball is fixed to the clip seat, and then assembled with the front end of the transition inner sleeve, thereby realizing the connection between the clip seat and the transition inner sleeve, which has the advantages of simple structure, convenient assembly, simple operation and high operational reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of the hemostatic clip in the open state according to the first embodiment of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the main structure of the middle hemostatic clip;

[0023] Figure 3 is a cross-sectional view of the hemostatic clip in a closed state according to the first embodiment of the present invention;

[0024] Figure 4 for Figure 3 Schematic diagram of the state after the hemostatic clip is separated;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of the transition inner sleeve in the hemostatic clip provided in the first embodiment of the present invention;

[0026] Figure 6 for Figure 5 A schematic cross-sectional structural diagram of a transition inner casing;

[0027] Figure 7 It is a schematic cross-sectional structural diagram of the inner sleeve in the hemostatic clip of the present invention;

[0028] Figure 8 for Figure 7 A schematic diagram of the three-dimensional structure of the inner sleeve in FIG.

[0029] Fig. 9 This is a schematic diagram of the three-dimensional structure of the clip seat in the hemostatic clip provided by the present invention;

[0030] Fig.10 for Fig. 9 A schematic cross-sectional view of the clamp seat;

[0031] Fig.11 This is a schematic diagram of the overall structure of the hemostatic clip provided by the present invention;

[0032] Fig.12 is a schematic cross-sectional structural diagram of a hemostatic clip in a closed state according to a second embodiment of the present invention;

[0033] Fig.13 It is a schematic diagram of the three-dimensional structure of the transition inner sleeve of the second embodiment of the present invention;

[0034] Fig.14 It is a schematic diagram of the three-dimensional structure of the pull rod according to the second embodiment of the present invention;

[0035] Fig.15 It is a schematic diagram of the three-dimensional structure of a rotating gasket according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] <First Embodiment>

[0038] like Figure 1-4 As shown, this embodiment of the present invention discloses a hemostatic clip, comprising an inner sleeve 1, a transition inner sleeve 2, a plurality of micro steel balls 3, a clamp seat 4, a ball head pull rod 5, two clips 6 and a fixed pin 7. The two clips 6 are arranged at the front end of the clamp seat 4 through the fixed pin 7, the lower ends of the two clips 6 are connected to the upper end of the ball head pull rod 5, the ball head pull rod 5 is sleeved in the transition inner sleeve 2, the transition inner sleeve 2 is sleeved in the inner sleeve 1, the inner sleeve 1 is restricted between the transition inner sleeve 2 and the clamp seat 4, the micro steel balls 3 are sandwiched between the clamp seat 4 and the transition inner sleeve 2, the micro steel balls 3 are embedded in the inner wall of the clamp seat 4 and fixedly connected to the clamp seat 4, and the micro steel balls 3 are also embedded in the outer wall of the front end of the transition inner sleeve 2, for realizing the connection between the clamp seat 4 and the transition inner sleeve 2.

[0039] Among them, Figure 5-6 As shown, the clip seat 4 includes an integrally formed circular tube 40 and two brackets 42 and 43 arranged above the circular tube 40. The brackets 42 and 43 are arranged opposite to each other, and a long groove 44 is formed between the two brackets. Through holes 45 are correspondingly arranged at the front ends of the brackets 42 and 43. An opening 46 is formed at the position where the circular tube 40 of the clip seat 4 is connected with the two brackets 42 and 43. Below the opening 46 is a tube cavity 47 with a larger inner diameter. The aperture of the opening 46 is larger than the distance between the two brackets 42 and 43, and smaller than the inner diameter of the tube cavity 47, so that an annular flange 48 is formed at the position of the opening 46 to achieve the locking of the clip 6.

[0040] like Figure 1 and Figure 2As shown, the two clips 6 are arranged in the long slot 44 between the two brackets 42 and 43 through the fixing pin 7. The fixing pin 7 passes through the slide slot 61 arranged in the middle of the two clips 6, and the two ends of the fixing pin 46 are fixed in the through holes 45 of the bracket 42 and the bracket 43, respectively.

[0041] The two clips 6 are arranged facing each other, and a sawtooth-shaped clamping portion 62 is arranged at the front end of the clip 6. A long strip-shaped slide groove 61 is arranged in the middle of the clip 6, and the fixed pin shaft 7 can slide in the slide groove 61. The slide groove 61 includes an inclined portion 611 and a bent portion 612, wherein the bent portion 612 is arranged at a position of the slide groove 61 close to the front end of the clip 6. When the fixed pin shaft 46 moves into the bent portion 612, the two clips 6 are in a closed locking position. The distance between the inclined portion 611 and the outer wall of the clip 6 gradually decreases from the rear end of the clip 6 to the front end; the extension direction of the bent portion 612 is parallel to the length direction of the clip 6.

[0042] The rear end of the clip 6 is provided with a hemispherical shell-shaped connecting portion 63 for connecting with the ball head 50 of the ball head pull rod 5. The ball head 50 of the ball head pull rod 5 is confined inside the hemispherical shell-shaped connecting portion 63 of the two clips 6. By pulling the ball head pull rod 5 downward, the ball head 50 drives the connecting portion 63 to move downward, and the fixed pin 7 slides along the slide groove 61 set in the middle of the clip 6. Under the action of the fixed pin 7, the two clips 6 are closed and clamp the tissue. Before the fixed pin 7 enters the bending part 612, the two clips 6 can be opened and closed multiple times with the push-pull action of the ball head pull rod 5. When the fixed pin 7 enters the bending part 612, the two clips 6 are locked.

[0043] A protrusion 64 is provided on the outer wall of the connecting portion 63 of the clip 6, which is used to cooperate with the annular flange 48 provided on the inner wall of the clip seat 4 to lock the clip 6. After the clamping portions 62 of the two clips 6 are clamped, by pulling the closed clip 6 downward, the protrusion 64 passes through the opening of the clip seat 4 and is stuck under the annular flange 48 in the clip seat 4, thereby locking the clip 6 in the clip seat 4.

[0044] The following further combines Figure 5-10 The separation mechanism of the above-mentioned hemostatic clip is described in detail.

[0045] like Figure 5-6As shown, the lower end of the clamp seat 4 has a protruding rib 49 for abutting against the upper shoulder 15 of the inner sleeve 1. Above the protruding rib 49, a plurality of circular holes 41 are provided in the circumferential direction, and the micro steel ball 3 can be fixed in the circular hole 41. Preferably, the number of circular holes is ≥2, evenly distributed on the circumference of the clamp seat 4, the micro steel ball 3 is welded in the circular hole 41, and the micro steel ball 3 protrudes inward (i.e., in the direction of the central axis) from the inner wall of the clamp seat 4. More preferably, three circular holes 41 with an angle of 120 degrees are provided on the clamp seat 4, each accommodating a part of a micro steel ball 3 (i.e., a part of the micro steel ball is in the circular hole, and a part is exposed outside the circular hole and accommodated in the groove 21 of the transition inner sleeve 2). In the assembled state, the circular hole 41 and the groove 21 of the transition inner sleeve 2 are aligned to accommodate the micro steel ball 3.

[0046] like Figure 7 and Figure 8 As shown in FIG. 1 , the transition inner sleeve 2 has a three-stage sleeve structure. The transition inner sleeve 2 includes a hollow tube body 20, and a groove 21 is provided at the upper end of the tube body 20, and a boss 22 is provided at the lower end of the tube body 20, so that in the assembled state, the end close to the clip 6 is the upper end, that is, Figure 2 The end shown as the upper end is the upper end. The tube body 20 of the transition inner sleeve 2 has the same inner diameter. A groove 21 is provided at the upper end of the tube body 20 for accommodating a part of the micro steel ball 3. Moreover, preferably, the upper wall of the groove 21 is an inclined surface 23 (see Figure 8 ), so that after the upper end of the transition inner sleeve 2 is deformed, the micro steel ball 3 can be released from the groove 21. A boss 22 is provided at the lower end of the tube body 20, and the outer diameter of the boss 22 is larger than the outer diameter of the tube body 20 of the transition inner sleeve 2, and the outer diameter of the boss 22 is equal to the outer diameter of the lower end 13 of the inner sleeve 1.

[0047] like Fig. 9 and Fig.10 As shown, the inner sleeve 1 is a hollow tubular structure. The inner sleeve 1 is a three-section sleeve with a large middle and small ends, including an upper end 11, a middle portion 12 and a lower end 13. The inner sleeve 1 has the same inner diameter as a whole, and the inner wall of the inner sleeve 1 contacts the outer wall of the tube body 20 of the transition inner sleeve 2. The middle portion 12 of the inner sleeve 1 has the largest outer diameter, and the outer diameter of the upper end 11 of the inner sleeve 1 and the outer diameter of the lower end 13 of the inner sleeve 1 are both smaller than the outer diameter of the middle portion 12. The outer diameter of the middle portion 13 of the inner sleeve is approximately the same as the maximum outer diameter of the clamp seat 4. An upper shoulder 15 is formed at the position where the middle portion 12 of the inner sleeve 1 and the upper end 11 of the inner sleeve 1 are connected, and a lower shoulder 16 is formed at the position where the middle portion 12 of the inner sleeve 1 and the lower end 13 of the inner sleeve 1 are connected. The upper end 11 of the inner sleeve 1 is inserted into the clamp seat 4, and the lower end surface of the rib 49 of the clamp seat 4 abuts against the upper shoulder 15 of the inner sleeve 1; the lower end 13 of the inner sleeve 1 is inserted into the spring tube 8, and the part below the lower shoulder 16 of the inner sleeve 1 abuts against the spring tube 8 of the hemostatic clip (see Fig.11) are fixedly connected together, and the rear end of the spring tube 8 is fixed to the control handle 9. In addition, the lower end 13 of the inner sleeve 1 abuts against the boss 22 of the transition inner sleeve 2, so that the lower end 13 of the inner sleeve 1 has a limiting effect on the upward movement of the transition inner sleeve 2, and also limits the inner sleeve 1 between the convex rib 49 of the clamp seat 4 and the boss 22 of the transition inner sleeve 2. The outer diameter of the lower end 13 of the inner sleeve 1 is the same as the outer diameter of the boss 22 of the transition inner sleeve 2.

[0048] According to the above embodiment, further, Figure 2 and Figure 3 As shown, the ball head pull rod 5 includes a ball head 50, a pull rod 51, a first connecting tube 52 and a second connecting tube 53 which are coaxially arranged from top to bottom. The ball head 50 is arranged at the upper end of the pull rod 51. The ball head 50 and the pull rod 51 can be integrally formed. The lower end of the pull rod 51 is inserted into the upper end of the first connecting tube 52 for fixing, and the lower end of the first connecting tube 52 is inserted into the upper end of the second connecting tube 53 for fixing. In order to facilitate equipment, the ball head 50, the pull rod 51, the first connecting tube 52 and the second connecting tube 53 can be detached, and can be fixedly connected together by interference fit, or by welding or gluing, or of course, integrally formed. The ball head 50 is connected to the clip 6 of the hemostatic clip. The first connecting tube 52 is arranged in the transition inner sleeve 2, and the second connecting tube 53 is placed outside the lower end of the transition inner sleeve 2, and is used to connect with the pull cable, so as to realize the push-pull action through the control handle.

[0049] In this embodiment, in order to adapt to the fixing of the small-sized clamp head and the cable, a first connecting tube 52 with a smaller outer diameter and a second connecting tube 53 with a larger outer diameter are provided in the ball head pull rod 5 to realize the fixing of the ball head pull rod 5 and the cable 10 (see Fig.11 ), the cable 10 extends backward from the spring tube 8, and the rear end of the cable 10 is fixed to the control handle 9. The outer diameter of the pull rod 51 matches the inner diameter of the first connecting tube 52, the outer diameter of the first connecting tube 52 can match the inner diameter of the transition inner sleeve 2, and the inner diameter of the second connecting tube 53, and the inner diameter of the second connecting tube 53 matches the outer diameter of the cable.

[0050] like Figure 2-4 As shown, the diameter of the ball head 50 is larger than the inner hole diameter of the transition inner sleeve 2. When traction is performed by pulling the ball head pull rod 5, after the ball head 50 of the ball head pull rod 5 is separated from the clip 6, since the diameter of the ball head 50 is larger than the inner hole diameter of the transition inner sleeve 2, when the ball head pull rod 5 is continued to be pulled forcefully, the transition inner sleeve 2 can be driven to slide downward.

[0051] When the transition inner sleeve 2 moves downward, the portion of the upper end of the transition inner sleeve 2 located above the groove 21 will be deformed, and the micro steel ball 3 partially contained in the groove 21 will move slightly in the radial direction along the inclined upper wall 23, that is, away from the central axis. The micro steel ball 3 moves in the radial direction until it is outside the upper wall 23 (that is, out of the groove 21), at which time the transition inner sleeve 2 is separated from the micro steel ball 3, thereby causing the transition inner sleeve 2 to separate from the clamp seat 4. After the transition inner sleeve 2 is separated from the clamp seat 4, the transition inner sleeve 2 continues to move downward under the traction of the pull rod 53. The inner sleeve 1 and the spring tube 8 are then separated from the clamp seat 4, thereby achieving the separation of the hemostatic clip.

[0052] <Second Embodiment>

[0053] The structures of this embodiment that are different from those of the first embodiment are described below in conjunction with the accompanying drawings, and the same structures are not described in detail again.

[0054] In this embodiment, if Fig.12 and Fig.13 As shown, by improving the structure of the transition inner sleeve 2, the positions of the transition inner sleeve 2 and the clamp seat 4 are relatively fixed, and the transition inner sleeve 2 cannot rotate relative to the clamp seat 4. Specifically, in this embodiment, a hemispherical pit 211 is provided at the upper end of the transition inner sleeve 2 to replace the groove 21 in the first embodiment. When the transition inner sleeve 2 and the clamp seat 4 are assembled, a part of the micro steel ball 3 is fixed in the through hole 41 of the clamp seat 4, for example, by welding; the other part of the micro steel ball 3, which is exposed outside the through hole 41, is accommodated in the hemispherical pit 211. That is, the through hole 41 is aligned with the pit 211 to accommodate the micro steel ball 3 together.

[0055] In this embodiment, the structure of the ball head pull rod 5 is improved at the same time, and a rotating gasket 25 is added to the lower end of the transition inner sleeve 2, so that the ball head pull rod 5 can drive the transition inner sleeve 2 through the rotating gasket 25, and then drive the clamp seat 4 and the clamp 6 to achieve 360° rotation relative to the inner sleeve 1.

[0056] like Fig.12 and Fig.14 As shown, the ball head tie rod 5 includes a ball head 50, a tie rod 51, a first connecting tube 52, a second connecting tube 53 and a rotating portion 54, wherein a rotating portion 54 with a rectangular cross section is provided between the first connecting tube 52 and the second connecting tube 53. The first connecting tube 52 and the second connecting tube 53 have the same inner diameter. The maximum size of the cross section of the rotating portion 54 is smaller than the outer diameter of the first connecting tube 52, that is, smaller than the inner diameter of the transition inner sleeve 2. A rotating portion 54 is fixed at the lower end (the end away from the ball head 50) of the transition inner sleeve 2. Fig.15The rotating gasket 25 shown in the figure has a rectangular connecting groove 27 in the rotating gasket 25. The shape and size of the rectangular connecting groove 27 in the rotating gasket 25 match the rotating portion 54, and the size of the connecting groove 27 is smaller than the outer diameter of the first connecting tube 52 and the second connecting tube 53, so that the rotating portion 54 is allowed to move in the up and down direction (i.e., the axial direction of the ball head tie rod 5) in the rectangular connecting groove 27, and the rotating portion 54 can only move in the radial direction of the ball head tie rod 5 together with the rotating gasket 25.

[0057] It can be understood by those skilled in the art that in the second embodiment, the connection groove 27 on the rotating gasket 25 can be in other shapes, not limited to a rectangle, for example, it can be a star shape, an ellipse, etc. Correspondingly, the cross-sectional shape of the rotating portion 54 of the ball head tie rod 5 is not limited to a rectangle, and only needs to meet the following requirements: matching the shape of the connection groove 27, allowing the ball head tie rod 5 to move freely along the axial direction in the transition inner sleeve 2, and making the transition inner sleeve 2 rotate when the ball head tie rod 5 rotates.

[0058] In actual use, when the ball head pull rod 5 rotates, since the rotating gasket 25 is fixedly connected to the transition inner sleeve 2, and the rotating gasket 25 is clamped on the rotating part 54, the rotating gasket 25 rotates with the rotating part 54. At the same time, the rotating gasket 25 drives the transition inner sleeve 2 to rotate. The micro steel ball 3 on the transition inner sleeve 2 moves along the circumferential direction accordingly. In this embodiment, the front end of the transition inner sleeve 2 is not provided with a groove to cooperate with the micro steel ball 3, but three pits 211 are provided to limit the micro steel ball 3, so that when the transition inner sleeve 2 is rotated, the clamp seat 4 and the clamp sheet 6 can be driven to rotate together.

[0059] Similar to the first embodiment, when the clamp seat 4 needs to be separated, the ball head pull rod 5 is pulled downward to deform the upper end of the transition inner sleeve 2, and the micro steel ball 3 slides out of the pit 211. Then, the ball head pull rod 5, the transition inner sleeve 2, the inner sleeve 1, the cable and the spring tube are pulled out of the clamp seat 4 to achieve separation.

[0060] In the above two embodiments, the front end of the spring tube 8 is fixed to the inner sleeve 1, and the front end of the inner sleeve 1 is inserted into the clamp seat 4. There is no fixing or limiting function between the inner sleeve 1 and the clamp seat 4, so during the rotation of the clamp seat 4, the spring tube 8 and the inner sleeve 1 do not rotate.

[0061] In summary, the hemostatic clip provided by the present invention uses a micro steel ball in conjunction with a groove or a through hole to achieve the connection and separation of the clip seat and the transition inner sleeve, and has a simple structure. Moreover, the hemostatic clip can be opened and closed and separated by simply pulling or rotating the pull rod, which is easy to operate and has high operational reliability.

[0062] The above is a detailed description of the hemostatic clip provided by the present invention. For those skilled in the art, any obvious changes made to the present invention without departing from the essence of the present invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal responsibilities.

Claims

1. A hemostatic clip, characterized in that It includes an inner sleeve, a transition inner sleeve, a plurality of miniature steel balls, a clamp seat, a ball head pull rod and two clamps; The ball head pull rod is sleeved in the transition inner sleeve, the transition inner sleeve is sleeved in the inner sleeve, the inner sleeve is confined between the transition inner sleeve and the clamp seat, and the micro steel ball is clamped between the clamp seat and the transition inner sleeve; The ball head tie rod comprises a coaxially arranged ball head, a tie rod, a first connecting tube and a second connecting tube, wherein the ball head is arranged at the upper end of the tie rod and connected to the clip; the lower end of the tie rod is connected to the upper end of the first connecting tube, and the lower end of the first connecting tube is inserted into the upper end of the second connecting tube; the first connecting tube is arranged in the transition inner sleeve, and the second connecting tube is arranged outside the lower end of the transition inner sleeve; By pulling the ball head pull rod, the transition inner sleeve is driven to move backward, so that the front end of the transition inner sleeve is deformed, thereby separating from the micro steel ball and the clamp seat.

2. The hemostatic clip according to claim 1, characterized in that: The clamp seat is provided with a round hole for fixing the miniature steel ball.

3. The hemostatic clip according to claim 2, characterized in that: The upper end of the transition inner sleeve is provided with a plurality of hemispherical pits, and the hemispherical pits are used to accommodate the micro steel balls together with the circular holes.

4. The hemostatic clip according to claim 1, characterized in that: A rotating portion is provided between the first connecting pipe and the second connecting pipe.

5. The hemostatic clip according to claim 4, characterized in that: A rotating gasket is fixed to the lower end of the transition inner sleeve; the rotating gasket includes a connecting groove, the shape of the connecting groove matches the shape and size of the rotating part, and the shape of the rotating part allows the ball head pull rod to move freely along the axial direction in the transition inner sleeve, and also enables the transition inner sleeve to rotate when the ball head pull rod rotates.

6. The hemostatic clip according to claim 5, characterized in that: The cross section of the rotating part is non-circular, and the maximum radial dimension of the rotating part is smaller than the inner diameters of the first connecting pipe and the second connecting pipe; The rotating gasket comprises a non-circular connecting groove for connecting with the middle portion of the pull rod having a non-circular cross-section.

7. The hemostatic clip according to claim 1, characterized in that: The inner sleeve is a three-section sleeve that is larger in the middle and smaller at both ends, and the outer diameters of the upper end and the lower end are both smaller than the outer diameter of the middle portion; the upper end of the inner sleeve is inserted into the clamp seat.

8. The hemostatic clip according to claim 7, characterized in that: A boss is arranged at the lower end of the transition inner sleeve, and the outer diameter of the boss is equal to the outer diameter of the lower end of the inner sleeve.

9. The hemostatic clip according to claim 7, characterized in that Also included are spring tubes, cables and control handles; The lower end of the inner sleeve is connected to the spring tube, the upper end of the cable is connected to the lower end of the ball head pull rod, and the lower end of the cable and the lower end of the spring tube are connected to the control handle.

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