A spiral buckle type hemostatic valve and a catheter sheath having the same

Abstract

The present invention provides a spiral buckle hemostatic valve and a catheter sheath having the same, belonging to the technical field of medical devices, wherein the spiral buckle hemostatic valve comprises: a first assembly part and a second assembly part that are threadedly matched, a sealing part is arranged between the first assembly part and the second assembly part, wherein in the threaded structure matched with the first assembly part and the second assembly part, at least part of the section is provided with a spring piece that can move radially, and the threaded match between the first assembly part and the second assembly part can be released in a loosening direction by moving the spring piece radially, so that the first assembly part and the second assembly part can be moved relatively away from each other in the axial direction; the spiral buckle hemostatic valve of the present invention can squeeze the sealing part by relatively rotating the first assembly part and the second assembly part, so that the caliber of the sealing part is reduced, and when a larger device needs to be inserted, the caliber of the sealing part is expanded by pressing the spring piece radially, and the operation is easy during surgery.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a spiral buckle-type hemostatic valve and a catheter sheath having the same. Background Art

[0002] During interventional surgery, the entire treatment system enters the blood vessels from the outside, so that the internal environment of the human body is connected to the outside atmosphere. In order to effectively prevent blood from flowing out or gas from entering the body and ensure the sterility of the blood vessels during the operation, the catheter sheath used in the interventional surgery must be equipped with a hemostatic valve with a certain degree of sealing. In addition, the hemostatic valve needs to meet two requirements: first, when the instrument is inserted into or withdrawn from the sheath, it needs to be effectively sealed; second, the friction resistance generated by the hemostatic valve on the instrument entering and exiting the catheter sheath should be as small as possible, otherwise it will affect the doctor's control of the instrument during the operation.

[0003] In order to solve the above problems, the hemostatic valve in the prior art has a sealing member disposed between two assemblies, and the opening size of the sealing member is adjusted by adjusting the pressure of the two assemblies on the sealing member, thereby meeting the above two requirements.

[0004] However, in the prior art, the two assembly parts are either matched by a threaded structure or by a clamping structure. When the two assembly parts are matched only by a threaded structure, when the seal needs to be loosened, it is necessary to rotate several times, which is inconvenient to operate; when the two assembly parts are matched only by a clamping structure, when the seal needs to be compressed, it is necessary to apply force in the axial direction to clamp the two assembly parts. However, when compressing the seal in the axial direction, the operator needs to apply a large force to compress it because the seal has a large resistance, so there is also the problem of inconvenient operation. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of inconvenient operation when adjusting the opening size of the seal in the hemostatic valve in the prior art, thereby providing a spiral buckle hemostatic valve and a catheter sheath having the same.

[0006] In order to solve the above technical problems, the present invention provides a spiral buckle type hemostatic valve, comprising:

[0007] a first assembly having a first support surface for abutting the sealing member;

[0008] a second assembly part, which cooperates with the first assembly part through a threaded structure, and the second assembly part has a second supporting surface opposite to the first supporting surface for abutting against the sealing member, and the first supporting surface and the second supporting surface can be brought closer to each other by relatively rotating the first assembly part and the second assembly part;

[0009] a sealing member, installed between the first supporting surface and the second supporting surface;

[0010] The threaded structure is provided with a spring sheet capable of moving radially on at least part of the section. By moving the spring sheet radially, the threaded fit between the first assembly part and the second assembly part can be released in a loosening direction, thereby causing the first assembly part and the second assembly part to move relatively away from each other in the axial direction.

[0011] Optionally, the thread structure includes:

[0012] A thread groove is provided on an assembly part;

[0013] The convex column is matched with the thread groove and is arranged on another assembly part. When the first assembly part and the second assembly part are relatively rotated, the convex column slides in the thread groove.

[0014] Optionally, the end section of the thread groove is arranged on the spring sheet.

[0015] Optionally, the spring sheet has a first receiving platform, and the first receiving platform naturally transitions to the end section of the thread groove.

[0016] Optionally, the spring sheet has a second receiving platform, and the second receiving platform naturally transitions to the first section of the thread groove.

[0017] Optionally, a gasket is provided between the second supporting surface of the second assembly part and the sealing member.

[0018] SHA202201395

[0019] Optionally, the gasket is made of polymer material.

[0020] Optionally, an axial clamping structure is provided between the gasket and the sealing member, and the axial clamping structure is used to limit radial movement between the gasket and the sealing member.

[0021] Optionally, the gasket has an annular flange on a surface facing the sealing element, and the sealing element has an annular groove for embedding the annular flange.

[0022] Optionally, the annular groove is composed of a plurality of arc-shaped grooves arranged at intervals.

[0023] Optionally, the sealing member includes: a first sealing member and a second sealing member which are stacked, wherein the first sealing member is close to the first supporting surface, and the second sealing member is close to the second supporting surface.

[0024] Optionally, the first sealing member has a cross opening at its center.

[0025] Optionally, the cross openings on the front and back sides of the first sealing member are staggered.

[0026] Optionally, the second sealing member has a circular opening at its center.

[0027] Optionally, a surface of the second sealing member facing away from the first sealing member has a hemispherical groove extending toward the circular opening, and the circular opening is located at the center of the hemispherical groove.

[0028] Optionally, the first assembly part includes: a shell and a snap-on part, the snap-on part is snap-connected to the shell, and the snap-on part is provided with a threaded groove for cooperating with the second assembly part.

[0029] Optionally, an installation channel leading to the threaded groove is axially provided on the outer wall of the fastener, the other end of the installation channel extends to the bottom end of the fastener, and a hook structure for installing a locking pin is provided on the installation channel.

[0030] Optionally, the top of the locking pin has an arc-shaped structure that naturally transitions with the thread groove.

[0031] The present invention further provides a catheter sheath, comprising: a sheath body and a spiral buckle hemostatic valve as described in any one of the above schemes, wherein the spiral buckle hemostatic valve is installed at the proximal end of the sheath body.

[0032] The technical solution of the present invention has the following advantages:

[0033] 1. The spiral snap-on hemostatic valve provided by the present invention can make the first supporting surface and the second supporting surface approach each other by relatively rotating the first assembly part and the second assembly part, so that the sealing part can be squeezed by applying a small force, the caliber of the sealing part is reduced, and the sealing effect is improved; when a larger device needs to be inserted, the threaded fit between the first assembly part and the second assembly part can be disengaged by radially pressing the spring sheet, so that the first assembly part and the second assembly part can be directly and quickly moved axially, and the first supporting surface and the second supporting surface can be moved away from each other without repeatedly rotating the first assembly part and the second assembly part, thereby reducing the squeezing of the sealing part and expanding the caliber of the sealing part; through this arrangement, the convenience of operation of the pressing structure is maintained, and the advantage of the small rotation force of the knob structure is maintained, that is, during surgery, the structure has the advantage of simple and easy operation.

[0034] 2. The spiral clip-on hemostatic valve provided by the present invention only performs unidirectional rotation during the rotation operation, thereby increasing the fault tolerance rate during the surgical operation; a gasket is arranged between the rotating part and the sealing part, and the gasket can reduce the distortion and deformation of the sealing part caused by the rotation action, thereby ensuring the sealing effect of the sealing part.

[0035] 3. The catheter sheath provided by the present invention has all the advantages of the spiral buckle type hemostatic valve because it adopts the spiral buckle type hemostatic valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 An exploded perspective view of an implementation of a spiral buckle-type hemostatic valve provided in an embodiment of the present invention;

[0038] Figure 2 for Figure 1 Further exploded diagram of;

[0039] Figure 3 for Figure 2 Stereoscopic image from an upward angle;

[0040] Figure 4 for Figure 2 Magnified view of the middle seal area;

[0041] Figure 5 for Figure 4 Stereoscopic image from an upward angle;

[0042] Figure 6 for Figure 2 A further exploded view of the first assembly in FIG.

[0043] Figure 7 for Figure 6 A three-dimensional view of the center locking pin.

[0044] Description of reference numerals:

[0045] 1. First assembly part; 2. Second assembly part; 3. First supporting surface; 4. Second supporting surface; 5. First sealing member; 6. Second sealing member; 7. Spring piece; 8. Threaded groove; 9. Boss; 10. First receiving platform; 11. Second receiving platform; 12. Gasket; 13. Annular flange; 14. Annular groove; 15. Cross opening; 16. Circular opening; 17. Hemispherical groove; 18. Housing; 19. Fastener; 20. Bump; 21. Slot; 22. Mounting channel; 23. Lock pin; 24. Arc structure. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] The spiral snap-on hemostatic valve provided in this embodiment can be used for the catheter sheath used in interventional surgery. The spiral snap-on hemostatic valve is installed at the proximal end of the sheath body, that is, the end close to the operator, to prevent blood from flowing out or gas from entering the body, thereby ensuring the sterility of the blood vessels during the operation.

[0051] like Figure 1-Figure 3 As shown, a specific implementation of the spiral snap-on hemostatic valve provided in this embodiment includes: a first assembly part 1 and a second assembly part 2 that cooperate with each other through a threaded structure, the first assembly part 1 has a first supporting surface 3 for abutting the seal, the second assembly part 2 has a second supporting surface 4 for abutting the seal opposite to the first supporting surface 3, and a seal is installed between the first supporting surface 3 and the second supporting surface 4. When in use, the first supporting surface 3 and the second supporting surface 4 can be brought closer to each other by relative rotation of the first assembly part 1 and the second assembly part 2, thereby squeezing the seal, reducing the caliber of the seal, and improving the sealing effect.

[0052] like Figure 1 As shown, in the spiral buckle hemostatic valve provided in this embodiment, the thread structure is provided with a spring piece 7 that can move in the radial direction on at least part of the segments, and the spring piece 7 can be moved in the radial direction to disengage the thread fit between the first assembly part 1 and the second assembly part 2, so that the first assembly part 1 and the second assembly part 2 can move relative to each other in the axial direction. When in use, when a larger device needs to be inserted, the spring piece 7 can be pressed in the radial direction to make the thread fit between the first assembly part 1 and the second assembly part 2 jump in the loosening direction, so that the first assembly part 1 and the second assembly part 2 can move relatively away from each other in the axial direction, so as to reduce the extrusion of the seal and expand the caliber of the seal.

[0053] Specifically, Figure 1 As shown, in the spiral buckle hemostatic valve provided in this embodiment, the root of the spring sheet 7 is connected to the first assembly part 1, and the free end of the spring sheet 7 extends in the axial direction. With such a configuration, when the spring sheet 7 is pressed in the radial direction, the free end of the spring sheet 7 is deformed, so that the boss 9 supported on the receiving platform of the spring sheet 7 is separated from the receiving platform, and then the boss 9 jumps and buckles to the next receiving platform in the axial direction, so that the axial movement between the first assembly part 1 and the second assembly part 2 is realized, and the axial movement distance between the first assembly part 1 and the second assembly part 2 is limited, so as to ensure that the two assemblies will not slip due to excessive blood pressure and other reasons.

[0054] In addition, the spiral buckle hemostatic valve provided in this embodiment only performs two actions during operation, namely, one-way rotating the assembly part and pressing the spring sheet 7. Therefore, there will be no problem of wrong direction, thereby increasing the fault tolerance during the surgical operation.

[0055] like Figure 1 As shown, in the spiral buckle hemostatic valve provided in this embodiment, the thread structure includes: a thread groove 8 and a boss 9 that cooperate with each other. The thread groove 8 is set on an assembly part, specifically on the first assembly part 1, and the boss 9 is set on another assembly part, specifically on the second assembly part 2. When the first assembly part 1 and the second assembly part 2 are relatively rotated, the boss 9 slides in the thread groove 8. In addition, as an alternative embodiment, the thread structure can also adopt relatively matching internal and external threads; or, the positions of the thread groove 8 and the boss 9 can be interchanged.

[0056] like Figure 1As shown, in the spiral buckle hemostatic valve provided in this embodiment, the end section of the thread groove 8 is arranged on the spring sheet 7. When the first assembly part 1 and the second assembly part 2 are rotated relative to each other, the boss 9 moves to the end section of the thread groove 8 and further supports the spring sheet 7. At this time, the first assembly part 1 and the second assembly part 2 exert the greatest force on the seal, the sealing effect of the seal is the best, and the passability is also the smallest. When a larger medical device needs to pass through, the boss 9 can be separated from the spring sheet 7 by pressing the spring sheet 7 inward. Under the action of the rebound force of the seal, the first assembly part 1 and the second assembly part 2 move away from each other. At this time, the boss 9 jumps to the head end of the thread groove 8, thereby directly adjusting the passability of the seal to the maximum, so as to facilitate the passage of the medical device. In addition, in the spiral buckle hemostatic valve provided in this embodiment, the spring sheet 7 has two symmetrically arranged spring sheets 7. When pressing the spring sheet 7, the two spring sheets 7 can be pressed at the same time, thereby further improving the convenience during operation.

[0057] like Figure 1 As shown, in the spiral buckle hemostatic valve provided in this embodiment, the spring piece 7 has a first receiving platform 10, and the first receiving platform 10 naturally transitions with the end section of the thread groove 8. The spring piece 7 also has a second receiving platform 11, and the second receiving platform 11 naturally transitions with the first section of the thread groove 8. When the boss 9 is released, the boss 9 can jump directly from the first receiving platform 10 to the second receiving platform 11, thereby jumping directly from the end of the thread groove 8 to the beginning, and completing the rapid release of the seal.

[0058] like Figure 2 , Figure 3 As shown, in the spiral buckle hemostatic valve provided in this embodiment, a gasket 12 is provided between the second supporting surface 4 of the second assembly part 2 and the sealing part, and the gasket 12 is used to reduce the torsional force acting on the sealing part when the second assembly part 2 is screwed. Specifically, the gasket 12 can be made of a polymer material, such as polycarbonate.

[0059] like Figure 4 , Figure 5As shown, in the spiral buckle hemostatic valve provided in this embodiment, an axial clamping structure is provided between the gasket 12 and the seal, and the axial clamping structure is used to limit the radial movement between the gasket 12 and the seal. Specifically, the gasket 12 has an annular flange 13 on the side facing the seal, and the seal has an annular groove 14 for embedding the annular flange 13, and the annular flange 13 is inserted in the annular groove 14, so that the gasket 12 is relatively stationary relative to the seal. The second assembly 2 is indirectly in contact with the seal through the gasket 12. When the first assembly 1 and the second assembly 2 are relatively rotated, the second assembly 2 slides relative to the gasket 12, so that the gasket 12 and the seal are kept relatively stationary, so as to avoid torsional deformation of the seal caused by the torsional force, and ensure the sealing of the seal. In addition, as an alternative embodiment, the annular flange 13 and the annular groove 14 can be interchanged in the arrangement positions of the gasket 12 and the seal.

[0060] like Figure 5 As shown, in the spiral buckle hemostatic valve provided in this embodiment, the annular groove 14 is composed of multiple arc grooves arranged at intervals. Through this arrangement, the area of ​​the seal can be reduced, and the relative stillness between the gasket 12 and the seal can be further ensured, the deformation of the seal caused by the torsional force can be reduced, and the sealing effect of the seal can be ensured. In addition, as an alternative embodiment, the annular groove 14 can also be a full circle structure.

[0061] like Figure 4 , Figure 5 As shown, in the spiral buckle hemostatic valve provided in this embodiment, the sealing member includes: a first sealing member 5 and a second sealing member 6 which are stacked, wherein the first sealing member 5 is close to the first supporting surface 3, and the second sealing member 6 is close to the second supporting surface 4. Specifically, the first sealing member 5 and the second sealing member 6 can be made of a flexible material, such as silicone. By providing two sealing members, the overall thickness of the sealing member can be increased, the deformation ability can be increased, and thus the adjustment ability can be improved.

[0062] like Figure 4 , Figure 5 As shown, in the spiral buckle hemostatic valve provided in this embodiment, the center of the first seal 5 has a cross opening 15. Furthermore, the cross openings 15 on the front and back sides of the first seal 5 are staggered. With this arrangement, when the medical device passes through the first seal 5, a good sealing effect can still be achieved. In addition, as an alternative embodiment, the center opening of the first seal 5 can also be other structures, such as: a cross-shaped opening, etc.

[0063] like Figure 4 , Figure 5 As shown, in the spiral buckle hemostatic valve provided in this embodiment, the center of the second sealing member 6 has a circular opening 16, through which medical devices are passed. The side of the second sealing member 6 facing away from the first sealing member 5 has a hemispherical groove 17 extending toward the circular opening 16, and the circular opening 16 is located at the center of the hemispherical groove 17. With this arrangement, when the second sealing member 6 is axially squeezed, the circular opening 16 of the second sealing member 6 can be radially reduced, thereby improving the sealing effect.

[0064] like Figure 6 As shown, in the spiral buckle hemostatic valve provided in this embodiment, the first assembly part 1 includes: a shell 18 and a buckle 19, the buckle 19 is buckled and connected to the shell 18, and the buckle 19 is provided with a thread groove 8 for cooperating with the second assembly part 2. Through this assembled structure, the buckle 19 and the shell 18 can be produced separately, thereby reducing the complexity of the structure and reducing the cost. Specifically, the inner wall of the buckle 19 has two symmetrically arranged grooves 21, and the part of the shell 18 for inserting the buckle 19 is correspondingly provided with two protrusions 20. When the shell 18 is inserted axially, the protrusion 20 is buckled in the groove 21, thereby completing the buckle connection between the two. In addition, as an alternative embodiment, the setting positions of the protrusion 20 and the groove 21 can be interchanged.

[0065] like Figure 6 As shown, in the spiral buckle hemostatic valve provided in this embodiment, an installation channel 22 leading to the thread groove 8 is axially provided on the outer wall of the buckle 19, and the other end of the installation channel 22 extends to the bottom end of the buckle 19, and a hook structure for installing a locking pin 23 is provided on the installation channel 22. Specifically, the installation channel 22 has two symmetrical ones, and the installation channel 22 is provided to allow the boss 9 of the second assembly part 2 to enter the thread groove 8 along the installation channel 22 when the second assembly part 2 is connected, and then the installation channel 22 is blocked by installing the locking pin 23.

[0066] like Figure 7 As shown, the top of the locking pin 23 in the spiral buckle hemostatic valve provided in this embodiment has an arc structure 24 that naturally transitions with the thread groove 8. When the locking pin 23 is inserted into the installation channel 22, the top of the locking pin 23 forms a part of the spiral groove. Through the natural transition and the setting of the arc structure 24, the screwing operation can be smoother.

[0067] In addition, this embodiment further provides a catheter sheath, comprising: a sheath body and the spiral buckle hemostatic valve described in the above scheme, wherein the spiral buckle hemostatic valve is installed at the proximal end of the sheath body.

[0068] How to use

[0069] The spiral buckle hemostatic valve provided in this embodiment can be used to relatively rotate the first assembly part 1 and the second assembly part 2 to axially squeeze the sealing part, thereby reducing the opening and increasing the sealing effect, but at the same time the resistance of the medical device will also increase.

[0070] When a medical device with a larger diameter needs to pass through, the spring sheet 7 can be pressed inward to release the threaded fit between the first assembly part 1 and the second assembly part 2. Then, under the elastic force of the seal, the first assembly part 1 and the second assembly part 2 are moved away from each other in the axial direction, the squeeze on the seal is released, and the central opening of the seal is restored, so that the medical device with a larger diameter can pass through.

[0071] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present invention.

Claims

1. A spiral buckle hemostatic valve, characterized in that: include: A first assembly part (1) having a first supporting surface (3) for abutting against the sealing part; A second assembly part (2) is matched with the first assembly part (1) through a threaded structure, the second assembly part (2) has a second support surface (4) opposite to the first support surface (3) and used to abut against the sealing member, and the first support surface (3) and the second support surface (4) can be brought closer to each other by relatively rotating the first assembly part (1) and the second assembly part (2); A sealing member installed between the first supporting surface (3) and the second supporting surface (4); The thread structure is provided with a spring piece (7) capable of moving in the radial direction on at least a portion of the sections. By moving the spring piece (7) in the radial direction, the threaded fit between the first assembly part (1) and the second assembly part (2) can be released in a loosening direction, thereby causing the first assembly part (1) and the second assembly part (2) to move relatively away from each other in the axial direction.

2. The spiral buckle hemostatic valve according to claim 1, characterized in that: The thread structure comprises: A thread groove (8) is provided on an assembly part; A convex column (9) is arranged on another assembly part in cooperation with the thread groove (8); when the first assembly part (1) and the second assembly part (2) are relatively rotated, the convex column (9) slides in the thread groove (8).

3. The spiral buckle hemostatic valve according to claim 2, characterized in that: The end section of the thread groove (8) is arranged on the spring sheet (7).

4. The spiral buckle hemostatic valve according to claim 2, characterized in that: The spring sheet (7) has a first receiving platform (10), and the first receiving platform (10) naturally transitions to the end of the thread groove (8).

5. The spiral buckle hemostatic valve according to claim 4, characterized in that: The spring sheet (7) is provided with a second receiving platform (11), and the second receiving platform (11) is naturally transitioned to the first section of the thread groove (8).

6. The spiral buckle hemostatic valve according to claim 1, characterized in that: A gasket (12) is provided between the second supporting surface (4) of the second assembly part (2) and the sealing member.

7. The spiral buckle hemostatic valve according to claim 6, characterized in that: The gasket (12) is made of polymer material.

8. The spiral buckle hemostatic valve according to claim 6, characterized in that: An axial clamping structure is provided between the gasket (12) and the sealing member, and the axial clamping structure is used to limit radial movement between the gasket (12) and the sealing member.

9. The spiral buckle hemostatic valve according to claim 8, characterized in that: The gasket (12) has an annular flange (13) on the side facing the sealing member, and the sealing member has an annular groove (14) for embedding the annular flange (13).

10. The spiral buckle hemostatic valve according to claim 9, characterized in that: The annular groove (14) is composed of a plurality of arc-shaped grooves arranged at intervals.

11. The spiral buckle hemostatic valve according to any one of claims 1 to 10, characterized in that: The sealing member comprises: a first sealing member (5) and a second sealing member (6) which are stacked, wherein the first sealing member (5) is close to the first supporting surface (3), and the second sealing member (6) is close to the second supporting surface (4).

12. The spiral buckle hemostatic valve according to claim 11, characterized in that: The center of the first sealing member (5) has a cross opening (15) or a Pozidriv opening.

13. The spiral buckle hemostatic valve according to claim 12, characterized in that: The cross openings (15) on the front and back sides of the first sealing member (5) are staggered.

14. The spiral buckle hemostatic valve according to claim 11, characterized in that: The second sealing member (6) has a circular opening (16) at its center.

15. The spiral buckle hemostatic valve according to claim 14, characterized in that: The second sealing member (6) has a hemispherical groove (17) on a side facing away from the first sealing member (5) and extending toward the circular opening (16), and the circular opening (16) is located at the center of the hemispherical groove (17).

16. The spiral buckle hemostatic valve according to any one of claims 1 to 10, characterized in that: The first assembly part (1) comprises: a shell (18) and a snap-fit ​​part (19), wherein the snap-fit ​​part (19) is snap-connected to the shell (18), and the snap-fit ​​part (19) is provided with a threaded groove (8) for cooperating with the second assembly part (2).

17. The spiral buckle hemostatic valve according to claim 16, characterized in that: An installation channel (22) leading to the threaded groove (8) is axially arranged on the outer wall of the locking member (19), and the other end of the installation channel (22) extends to the bottom end of the locking member (19). A hook structure for installing a locking pin (23) is arranged on the installation channel (22).

18. The spiral buckle hemostatic valve according to claim 17, characterized in that: The top of the locking pin (23) has an arc-shaped structure (24) that naturally transitions with the thread groove (8).

19. A catheter sheath, characterized in that: include: A sheath body and a spiral buckle hemostatic valve according to any one of claims 1 to 18, wherein the spiral buckle hemostatic valve is installed at the proximal end of the sheath body.

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