Absorbable double-layer ligation clamp

Abstract

The utility model discloses an absorbable double-layer ligation clamp, and belongs to the field of medical instruments. The absorbable double-layer ligation clamp comprises an outer sleeve part, an outer-layer clamp body and an inner-layer clamp body, the outer-layer clamp body and the inner-layer clamp body are assembled in the outer sleeve part, a positioning column is arranged on the inner-layer clamp body, a positioning hole used for containing the positioning column is formed in the outer sleeve part, and the outer side of the positioning hole is totally closed or partially closed. And the size of an outer side opening formed after local closing is smaller than the size of the end part of the positioning column. According to the utility model, the outer side of the positioning hole on the original outer sleeve piece is totally closed or partially closed, so that the positioning column of the adjacent inner layer clip is limited to be clamped into the positioning hole of the outer sleeve piece from the outer side, and the outer sleeve piece is effectively prevented from pulling the clamped ligation clips when two ligation clips are close to each other; the clamping reliability and the operation safety of the double-layer ligation clip are improved, and the closing effect of the ligation clip is guaranteed.

Description

Technical Field

[0001] The utility model relates to a ligating clip, and more particularly to an absorbable double-layer ligating clip. Background Art

[0002] In surgical operations, ligating clips are often used to clamp intracavitary tissues or blood vessels to achieve hemostasis and ligation. According to the material of the ligating clip, it can be divided into metal clips, non-absorbable clips and absorbable clips. Among them, the absorbable ligating clip is made of degradable materials and can be completely degraded and absorbed in the body after a period of time. Therefore, currently, the absorbable ligating clip is more widely used and more easily accepted by patients.

[0003] The absorbable ligating clip is structurally divided into a V-shaped single clip and a double-layer ligating clip. Compared with the V-shaped single clip, the double-layer ligating clip is composed of an inner clip and an outer clip, and the two are jointly assembled in an outer sleeve to form a ligating clip assembly. Although the structure of the double-layer ligating clip is more complex than that of the V-shaped single clip, the clamping effect of the cooperation between the inner and outer clips is better, and the use is more convenient and efficient.

[0004] As Figure 1 and Figure 2 shown, the inner clip 3 of the existing double-layer ligating clip is held in an open state on two outer clip arms 1-1 at the front end of the outer sleeve 1. The clip arms of the inner clip 3 are located in the limit grooves 1-2 on the inner sides of the corresponding outer clip arms 1-1. Elastic arms 1-3 are provided on both sides of the outer sleeve 1, and positioning holes 1-4 are provided at the front ends of the elastic arms 1-3. The positioning posts 3-1 on both sides of the rear part of the inner clip 3 are engaged in the corresponding positioning holes 1-4. The outer clip 2 is arranged inside the outer sleeve 1 and is located behind the inner clip 3. Generally, a push block is further arranged behind the outer clip 2 for pushing the outer clip 2 to move forward. When in use, the rear end of the outer sleeve 1 is installed on a clip-applying instrument, and the firing action of the clip-applying instrument pushes the push block forward, and then pushes the outer clip 2 to slide forward. Since the position of the inner clip 3 is fixed by the positioning posts 3-1, the inner clip 3 cannot move forward at this time. As the outer clip 2 moves forward, the inner clip 3 enters between the two clamping arms of the outer clip 2, realizing the closing of the clip arms of the inner clip 3. After the inner clip 3 is completely closed, continue to push the outer clip 2. At this time, the elastic arms 1-3 are deformed outward due to the extrusion of the positioning posts 3-1, and then the positioning posts 3-1 of the inner clip 3 are disengaged from the corresponding positioning holes 1-4, completing the clip-applying process.

[0005] In clinical practice, in order to effectively ligate tissues or blood vessels, multiple ligating clips are usually used in combination. When the clip-applying positions of two ligating clips are relatively close, sometimes interference occurs between the already clip-applied ligating clip and the outer sleeve 1. Specifically, referring to Figure 3As shown, clinical practice has found that since the above-mentioned positioning holes 1-4 are through holes with a certain depth, when two ligating clips are close to each other, the positioning post 3-1 of the inner clip 3 that has been applied is likely to get stuck in the positioning hole 1-4 of the outer sleeve 1 being applied. Especially in the final stage of the application process, the outward deformation of the elastic arm 1-3 will further exacerbate this phenomenon. With the backward movement of the outer sleeve 1 after the application is completed, it is very easy to exert a pulling effect on the ligating clip that has already been applied, resulting in the displacement of the ligating clip that has already been applied. This pulling phenomenon not only easily affects the closing reliability of the ligating clip on tissues or blood vessels, but also easily causes damage to the patient, increasing the safety hazard. Summary of the Invention

[0006] 1. Technical problems to be solved by the utility model

[0007] The purpose of the present utility model is to overcome the above-mentioned deficiencies existing in the existing double-layer ligating clip, and provide an absorbable double-layer ligating clip. By adopting the technical solution of the present utility model, the outer side of the positioning hole on the original outer sleeve is fully enclosed or partially enclosed to limit the positioning post of the adjacent inner clip from being stuck into the positioning hole of the outer sleeve from the outside, effectively avoiding the pulling of the outer sleeve on the ligating clip that has already been applied when two ligating clips are close to each other, improving the application reliability and operation safety of the double-layer ligating clip, and ensuring the closing effect of the ligating clip.

[0008] 2. Technical solution

[0009] To achieve the above purpose, the technical solution provided by the present utility model is as follows:

[0010] An absorbable double-layer ligating clip of the present utility model includes an outer sleeve, an outer clip and an inner clip assembled in the outer sleeve. The inner clip is provided with a positioning post, and the outer sleeve is provided with a positioning hole for accommodating the positioning post. The outer side of the positioning hole is fully enclosed or partially enclosed, and the size of the outer opening formed after partial enclosure is smaller than the end size of the positioning post.

[0011] Furthermore, the outer side of the positioning hole is closed by a sealing piece, and the sealing piece is integrally formed on the outer sleeve or secondarily connected to the outer sleeve.

[0012] Furthermore, the sealing piece is secondarily connected to the outer sleeve by means of adhesive bonding, heat ironing or ultrasonic welding process.

[0013] Furthermore, the sealing piece is integrally injection-molded on the outer sleeve and fully encloses the outer side of the positioning hole to form a closed groove.

[0014] Furthermore, the sealing piece is provided with a connection hole, and the outer sleeve is provided with a connection post at the positioning hole. The sealing piece covers the outer side of the positioning hole, and the connection post passes through the positioning hole and is heat-ironed and connected together.

[0015] Further, an engaging concave-convex welding structure is provided on the outer side of the hole-sealing piece and the positioning hole, and the hole-sealing piece covers the outer side of the positioning hole and is ultrasonically welded together.

[0016] Further, the front end of the outer sleeve has two outer sleeve clamping arms for accommodating the inner layer clip. Limiting grooves are provided on the inner sides of the outer sleeve clamping arms. Elastic arms are respectively provided on both sides of the outer sleeve clamping arms on the outer sleeve, and the positioning holes are located at the cantilever ends of the corresponding elastic arms.

[0017] Further, the outer layer clip is located at the rear of the inner layer clip inside the outer sleeve, and both the outer layer clip and the inner layer clip are made of absorbable materials.

[0018] 3. Beneficial effects

[0019] Adopting the technical solution provided by the present utility model, compared with the existing well-known technologies, it has the following beneficial effects:

[0020] (1) A kind of absorbable double-layer ligating clip of the present utility model includes an outer sleeve, and an outer layer clip and an inner layer clip assembled inside the outer sleeve. A positioning post is provided on the inner layer clip, and a positioning hole for accommodating the positioning post is provided on the outer sleeve. The outer side of the positioning hole is fully enclosed or partially enclosed, and the size of the outer opening formed after partial enclosure is smaller than the end size of the positioning post, so as to limit the positioning posts of adjacent inner layer clips from being inserted into the positioning holes of the outer sleeve from the outside, effectively avoiding the outer sleeve from pulling on the ligating clip that has been applied when two ligating clips are relatively close, improving the application reliability and operation safety of the double-layer ligating clip, preventing the ligating clip from loosening, and ensuring the closing effect of the ligating clip;

[0021] (2) For a kind of absorbable double-layer ligating clip of the present utility model, the outer side of the positioning hole is closed by a hole-sealing piece, and the hole-sealing piece is integrally formed on the outer sleeve or secondarily connected to the outer sleeve; further, the hole-sealing piece is secondarily connected to the outer sleeve by an adhesive or heat ironing or ultrasonic welding process, or the hole-sealing piece is integrally injection-molded on the outer sleeve and fully encloses the outer side of the positioning hole to form a closed groove; with the above design, the structure is simple and the production is convenient. Description of the drawings

[0022] Figure 1 It is a schematic three-dimensional structure diagram of an existing double-layer ligating clip;

[0023] Figure 2 It is a schematic cross-sectional structure diagram of an existing double-layer ligating clip;

[0024] Figure 3 It is a schematic diagram of interference between an existing double-layer ligating clip and a ligating clip that has been applied during the application process;

[0025] Figure 4Schematic three-dimensional structure diagram of an absorbable double-layer ligation clip according to Embodiment 1 of the present utility model;

[0026] Figure 5 Schematic cross-sectional structure diagram of an absorbable double-layer ligation clip according to Embodiment 1 of the present utility model;

[0027] Figure 6 Schematic cross-sectional structure diagram of the outer kit according to Embodiment 1 of the present utility model;

[0028] Figure 7 Schematic three-dimensional structure diagram of an absorbable double-layer ligation clip according to Embodiment 2 of the present utility model;

[0029] Figure 8 Schematic cross-sectional structure diagram of an absorbable double-layer ligation clip according to Embodiment 2 of the present utility model;

[0030] Figure 9 Schematic split structure diagram of the hole-sealing sheet on the outer kit according to Embodiment 2 of the present utility model;

[0031] Figure 10 Schematic cross-sectional structure diagram of the outer kit according to Embodiment 2 of the present utility model;

[0032] Figure 11 Schematic three-dimensional structure diagram of an absorbable double-layer ligation clip according to Embodiment 3 of the present utility model;

[0033] Figure 12 Schematic cross-sectional structure diagram of an absorbable double-layer ligation clip according to Embodiment 3 of the present utility model;

[0034] Figure 13 Schematic split structure diagram of the hole-sealing sheet on the outer kit according to Embodiment 3 of the present utility model;

[0035] Figure 14 Schematic cross-sectional structure diagram of the outer kit according to Embodiment 3 of the present utility model;

[0036] Figure 15 Schematic three-dimensional structure diagram of an absorbable double-layer ligation clip according to Embodiment 4 of the present utility model;

[0037] Figure 16 Schematic cross-sectional structure diagram of an absorbable double-layer ligation clip according to Embodiment 4 of the present utility model;

[0038] Figure 17 Schematic split structure diagram of the hole-sealing sheet on the outer kit according to Embodiment 4 of the present utility model;

[0039] Figure 18 Schematic cross-sectional structure diagram of the outer kit according to Embodiment 4 of the present utility model;

[0040] Figure 19Schematic three-dimensional structure diagram of an absorbable double-layer ligating clip according to Embodiment 5 of the present utility model;

[0041] Figure 20 Schematic cross-sectional structure diagram of an absorbable double-layer ligating clip according to Embodiment 5 of the present utility model;

[0042] Figure 21 Schematic split structure diagram of the hole-sealing piece on the outer sleeve according to Embodiment 5 of the present utility model;

[0043] Figure 22 Schematic cross-sectional structure diagram of the outer sleeve according to Embodiment 5 of the present utility model.

[0044] Explanation of the reference numerals in the schematic diagram:

[0045] 1. Outer sleeve; 1-1. Outer clamping arm; 1-2. Limit groove; 1-3. Elastic arm; 1-3-1. Connecting column; 1-3-2. Groove; 1-3-3. Ring groove; 1-4. Positioning hole; 1-5. Sealing groove; 2. Outer layer clamp; 3. Inner layer clamp; 3-1. Positioning post; 4. Hole-sealing piece; 4-1. Connecting hole; 4-2. Protrusion. Detailed implementation manners

[0046] To further understand the content of the present utility model, the present utility model will be described in detail in conjunction with the accompanying drawings.

[0047] Figures 1 to 3 Shows the structure of the existing double-layer ligating clip and the reasons for the interference phenomenon with the already applied ligating clip during the clip application process. Clinical practice has found that when multiple ligating clips are closed at adjacent positions, the positioning post 3-1 of the inner layer clamp 3 in the already applied ligating clip is likely to get stuck in the positioning hole 1-4 of the outer sleeve 1 being applied, and be pulled when the outer sleeve 1 retreats, resulting in the displacement of the ligating clip and affecting the closing effect. To solve this problem, the present utility model adjusts the positioning hole 1-4 of the outer sleeve 1, specifically by closing the outside of the positioning hole 1-4 to prevent the positioning post 3-1 of the adjacent inner layer clamp 3 from getting stuck in the positioning hole 1-4 from the outside, while retaining the positioning function of the positioning groove inside the positioning hole 1-4 for the inner layer clamp 3. The closing of the outside of the positioning hole 1-4 can be full closing or partial closing. By closing the outside of the positioning hole 1-4, the positioning post 3-1 of the inner layer clamp 3 in the already applied ligating clip cannot enter the positioning hole 1-4, thus effectively preventing the operation interference problem when two ligating clips are close to each other, and improving the clip application reliability and operation safety of the double-layer ligating clip.

[0048] The present utility model will be further described below in conjunction with embodiments.

[0049] [Embodiment 1]

[0050] As Figures 4 to 6As shown in the figure, an absorbable double-layer ligating clip according to this embodiment includes an outer sleeve 1, an outer clip 2 and an inner clip 3 assembled inside the outer sleeve 1. A positioning post 3-1 is provided on the inner clip 3, and a positioning hole 1-4 for accommodating the positioning post 3-1 is provided on the outer sleeve 1. The outside of the positioning hole 1-4 is fully enclosed or partially enclosed, and the size of the outer opening formed after partial enclosure is smaller than the end size of the positioning post 3-1. In this way, the positioning post 3-1 on the inner clip 3 cannot be inserted into the positioning hole 1-4 of the outer sleeve 1 from the outside, thus solving the above interference problem during the clip application process.

[0051] In this embodiment, the outside of the positioning hole 1-4 is closed by a sealing piece 4. The sealing piece 4 is integrally formed on the outer sleeve 1, that is, the sealing piece 4 is formed together with the outer sleeve 1 during the molding process to close the outer opening of the positioning hole 1-4 or reduce the size of the outer opening of the positioning hole 1-4. That is to say, there are two structural forms here. One is that the outer opening of the positioning hole 1-4 is fully enclosed, and the other is that the size of the outer opening of the positioning hole 1-4 is reduced to be smaller than the end size of the positioning post 3-1. The former positioning hole 1-4 is a blind hole structure integrally formed, and the latter positioning hole 1-4 is a reduced hole structure integrally formed. Specifically, in this embodiment, the sealing piece 4 is integrally injection molded on the outer sleeve 1 and fully encloses the outside of the positioning hole 1-4 to form a closed groove 1-5. The closed groove 1-5 is a blind hole structure as a whole, which can position the positioning post 3-1 of the inner clip 3. The outer closure will not interfere with other ligating clips, especially eliminating the possibility that the positioning post 3-1 of the adjacent inner clip 3 is inserted into the positioning hole 1-4, and preventing the phenomenon that the outer sleeve 1 pulls the ligating clip that has been applied when two ligating clips are close.

[0052] Refer to Figure 4As shown, similar to the structure of the existing double-layer ligation clip, the front end of the outer sleeve 1 has two outer clip arms 1-1 for accommodating the inner clip 3. A limiting groove 1-2 is provided on the inner side of the outer clip arm 1-1. The inner clip 3 is located between the two outer clip arms 1-1 in an open state, and the two clip arms of the inner clip 3 are respectively located in the corresponding limiting grooves 1-2. Elastic arms 1-3 are respectively provided on both sides of the outer sleeve 1 where the outer clip arms 1-1 are located. The elastic arms 1-3 can be integrally formed with the outer sleeve 1, presenting a cantilever state as a whole and having a certain elasticity to deform outward. The positioning holes 1-4 are located at the cantilever ends of the corresponding elastic arms 1-3, and the two positioning posts 3-1 at the rear of the inner clip 3 are respectively positioned in the positioning holes 1-4 on the corresponding side. The outer clip 2 is located in the slideway inside the outer sleeve 1. The front end of the outer clip 2 has a guiding notch roughly in a V shape, enabling the inner clip 3 to enter the clamping groove of the outer clip 2 along the guiding notch. A guiding track is also provided in the clamping groove of the outer clip 2, and track grooves are provided on the outer sides of the two clip arms of the inner clip 3. The outer clip 2 is located at the rear of the inner clip 3 inside the outer sleeve 1. Both the outer clip 2 and the inner clip 3 are made of absorbable materials. During the process of the outer clip 2 being pushed forward by a thrust force, the inner clip 3 does not move relative to the outer sleeve 1 under the limiting action of the positioning posts 3-1 and the positioning holes 1-4. At this time, as the outer clip 2 is pushed forward, the inner clip 3 gradually enters the clamping groove of the outer clip 2, causing the clip arms of the inner clip 3 to close. When the inner clip 3 is completely closed and the outer clip 2 is in contact with the inner clip 3, continuing to push the outer clip 2 forward forces the inner clip 3 to move forward together. At this time, the elastic arms 1-3 elastically deform outward under the action of the positioning posts 3-1, and finally the positioning posts 3-1 are disengaged from the positioning holes 1-4, completing the entire clip application process.

[0053] [Embodiment 2]

[0054] A kind of absorbable double-layer ligation clip in this embodiment has the same basic structure and working principle as that in Embodiment 1, the difference being that:

[0055] In this embodiment, the sealing piece 4 is secondarily connected to the outer sleeve 1, that is, the outer sleeve 1 and the sealing piece 4 are separately manufactured. The positioning holes 1-4 on the outer sleeve 1 are similar to those in the prior art and are all through holes. The outside of the positioning holes 1-4 is sealed by the sealing piece 4. Similarly, the sealing of the positioning holes 1-4 by the sealing piece 4 can be full sealing or partial sealing. When it is partial sealing, it is only necessary to ensure that the size of the formed outside opening is smaller than the end size of the positioning posts 3-1. With this design, compared with the integrally formed design in Embodiment 1, the forming die structure of the outer sleeve 1 is simpler and easier to manufacture.

[0056] The sealing piece 4 can be connected to the outer sleeve 1 by various processes. For example, the sealing piece 4 can be secondarily connected to the outer sleeve 1 by processes such as adhesive bonding, heat ironing, or ultrasonic welding. This embodiment gives a specific heat ironing connection structure. Refer to Figure 7 andFigure 9 As shown, a connection hole 4-1 is provided on the hole-sealing piece 4, and a connection post 1-3-1 is provided on the outer sleeve 1 at the positioning hole 1-4. The hole-sealing piece 4 covers the outside of the positioning hole 1-4, and the connection post 1-3-1 passes through the positioning hole 1-4 and is thermally ironed and connected together. After the hole-sealing piece 4 covers the positioning hole 1-4, the connection post 1-3-1 protrudes from the hole-sealing piece 4. At this time, the connection post 1-3-1 is heated by a thermal ironing process, so that the upper end of the connection post 1-3-1 is melted and deformed, and then the hole-sealing piece 4 is fixed.

[0057] [Embodiment 3]

[0058] A kind of absorbable double-layer ligation clip in this embodiment has the same basic structure and working principle as that in Embodiment 2, the difference is that:

[0059] In this embodiment, the hole-sealing piece 4 is secondarily connected to the outer sleeve 1 by an ultrasonic welding process. Specifically, a matching concave-convex welding structure is provided on the outside of the hole-sealing piece 4 and the positioning hole 1-4. The hole-sealing piece 4 covers the outside of the positioning hole 1-4 and is ultrasonically welded together.

[0060] Referring to Figures 11 to 14 As shown, a convex block 4-2 is provided on the inner side of the hole-sealing piece 4, and a groove 1-3-2 is provided near the positioning hole 1-4. After the hole-sealing piece 4 covers the positioning hole 1-4, the convex block 4-2 is just located in the groove 1-3-2. Through the ultrasonic welding process, the convex block 4-2 can be welded to the groove 1-3-2, and then the fixed connection of the hole-sealing piece 4 on the outer sleeve 1 is realized.

[0061] [Embodiment 4]

[0062] A kind of absorbable double-layer ligation clip in this embodiment has the same basic structure and working principle as that in Embodiment 3, the difference is that:

[0063] In Embodiment 3, the hole-sealing piece 4 and the outer sleeve 1 are locally ultrasonically welded, while in this embodiment, the hole-sealing piece 4 and the outer sleeve 1 are welded around.

[0064] Referring to Figures 15 to 18 As shown, a ring groove 1-3-3 is provided around the outside of the positioning hole 1-4, and a ring of convex ribs is correspondingly provided around the hole-sealing piece 4. After the hole-sealing piece 4 covers the positioning hole 1-4, the convex ribs are located in the ring groove 1-3-3. Through the ultrasonic welding process, the convex ribs can be welded to the ring groove 1-3-3, and then the fixed connection of the hole-sealing piece 4 on the outer sleeve 1 is realized.

[0065] [Embodiment 5]

[0066] A kind of absorbable double-layer ligation clip in this embodiment has the same basic structure and working principle as the above Embodiments 1 to 4, the difference is that:

[0067] Referring to Figures 19 to 22 As shown, in this embodiment, the hole-sealing piece 4 partially seals the positioning holes 1-4, such as semi-sealing or the like. After partially sealing the outside of the positioning holes 1-4, the opening size formed on the outside of the positioning holes 1-4 is smaller than the end size of the positioning post 3-1 of the adjacent ligation clip, and the positioning posts 3-1 of the adjacent ligation clips cannot enter the positioning holes 1-4 from the outside either. Therefore, the same effect as full sealing can be achieved.

[0068] In this embodiment, the size of the hole-sealing piece 4 is smaller than the outside size of the positioning holes 1-4. The two can be connected by means of adhesive bonding, heat ironing or ultrasonic welding processes. It is only necessary to ensure that the outside opening size formed after partial sealing is smaller than the end size of the positioning post 3-1.

[0069] It should be understood that for the absorbable double-layer ligation clip of the present invention, the inventive concept is to eliminate the outside opening of the positioning holes 1-4 on the outer sleeve 1 or to make the outside size of the positioning holes 1-4 on the outer sleeve 1 smaller than the end size of the positioning posts 3-1 of the inner clip 3, so as to restrict the positioning posts 3-1 of the adjacent inner clips 3 from being inserted into the positioning holes 1-4 from the outside. Several specific implementation manners are given in the above embodiments, but the technical means for implementing the above inventive concept in the present invention are not limited to the above embodiments. For example, the hole-sealing piece 4 can also be fixed on the outer sleeve 1 by means of buckles, screws, etc. Any similar implementation manners that do not depart from the above inventive concept belong to the protection scope of the present invention.

[0070] For an absorbable double-layer ligation clip of the present invention, the outside of the positioning holes on the original outer sleeve is fully sealed or partially sealed to restrict the positioning posts of the adjacent inner clips from being inserted into the positioning holes of the outer sleeve from the outside, effectively avoiding the outer sleeve from pulling on the already applied ligation clip when two ligation clips are relatively close, improving the application reliability and operation safety of the double-layer ligation clip, preventing the ligation clip from loosening, and ensuring the closing effect of the ligation clip.

[0071] The present invention and its implementation manners are schematically described above. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the purpose of the present invention, they shall all belong to the protection scope of the present invention.

Claims

1. An absorbable double-layer ligation clip, comprising an outer sleeve (1), an outer layer clip (2) and an inner layer clip (3) assembled in the outer sleeve (1), a positioning post (3-1) is provided on the inner layer clip (3), and a positioning hole (1-4) for accommodating the positioning post (3-1) is provided on the outer sleeve (1), characterized in that: The outer side of the positioning hole (1-4) is fully enclosed or partially enclosed, and the size of the outer opening formed after partial enclosure is smaller than the end size of the positioning post (3-1).

2. The absorbable double-layer ligation clip according to claim 1, wherein: The outer side of the positioning hole (1-4) is closed by a hole-sealing sheet (4), and the hole-sealing sheet (4) is integrally formed on the outer sleeve (1) or secondarily connected to the outer sleeve (1).

3. The absorbable double-layer ligation clip according to claim 2, wherein: The hole-sealing sheet (4) is secondarily connected to the outer sleeve (1) by means of adhesive bonding, heat ironing or ultrasonic welding.

4. The absorbable double-layer ligation clip according to claim 2, wherein: The hole-sealing sheet (4) is integrally injection-molded on the outer sleeve (1) and fully encloses the outer side of the positioning hole (1-4) to form a closed groove (1-5).

5. The absorbable double-layer ligation clip according to claim 2, wherein: The hole-sealing sheet (4) is provided with a connecting hole (4-1), the outer sleeve (1) is provided with a connecting post (1-3-1) at the position of the positioning hole (1-4), the hole-sealing sheet (4) covers the outer side of the positioning hole (1-4), and the connecting post (1-3-1) passes through the positioning hole (1-4) and is heat-ironed and connected together.

6. The absorbable double-layer ligation clip according to claim 2, wherein: The hole-sealing sheet (4) and the outer side of the positioning hole (1-4) are provided with a matching concave-convex welding structure, and the hole-sealing sheet (4) covers the outer side of the positioning hole (1-4) and is ultrasonically welded together.

7. The absorbable double-layer ligation clip according to any one of claims 1 to 6, characterized in that: The front end of the outer sleeve (1) has two outer sleeve clamping arms (1-1) for accommodating the inner layer clamp (3), the inner side of the outer sleeve clamping arm (1-1) is provided with a limiting groove (1-2), the outer sleeve (1) is provided with elastic arms (1-3) on both sides of the outer sleeve clamping arm (1-1), and the positioning hole (1-4) is located at the cantilever end of the corresponding elastic arm (1-3).

8. The absorbable double-layer ligation clip according to claim 7, wherein: The outer layer clamp (2) is located at the rear of the inner layer clamp (3) inside the outer sleeve (1), and both the outer layer clamp (2) and the inner layer clamp (3) are made of absorbable materials.

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