Wire locking device for annulus repair and annulus repair system

Abstract

The invention discloses a wire locking device for annulus repair and an annulus repair system, and relates to the technical field of medical instruments, and the wire locking device comprises a first supporting structure fixedly connected with a nailing device; the rotating structure axially penetrates through the first supporting structure and is movably connected with the first supporting structure; the first limiting structure radially penetrates through the rotating structure and partially extends out of the side wall of the rotating structure; the second limiting structure is arranged on the axial side wall of the first supporting structure; when the first limiting structure and the second limiting structure are located on the two sides of the first supporting structure correspondingly, the rotating structure is used for rotating relative to the first supporting structure so that the locking wire can be wound around the rotating structure. When the first limiting structure and the second limiting structure are located on the same side, the first limiting structure and the second limiting structure are used for limiting rotation of the rotating structure. Therefore, during locking, the device is used for simultaneously tensioning the locking wire from the two ends so as to contract the valve ring, the whole operation is simple, and the locking is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a wire locking device for annulus repair and an annulus repair system. Background Art

[0002] Currently, mitral insufficiency mainly has two treatment methods: drug treatment and surgical treatment. In surgical treatment, it is divided into edge-to-edge repair, annulus repair, and chordae tendineae repair. For annulus repair, the doctor nails multiple groups of nailing devices on the annulus and tightens the nailing devices through a wire locking device to contract the annulus tissue and achieve annulus repair. However, the existing wire locking devices have complex structures, cumbersome operations, and poor locking effects on the locking wires after tightening, which easily causes the locking wires to loosen, thereby expanding the annulus tissue and affecting the postoperative recovery degree. Summary of the Invention

[0003] In view of the above defects or deficiencies in the prior art, the present invention provides a wire locking device for annulus repair and an annulus repair system.

[0004] To achieve the above object, a wire locking device for annulus repair according to the present invention includes: A first support structure fixedly connected to the nailing device; A rotating structure axially penetrating the first support structure and movably connected to the first support structure, and one end of the locking wire is fixedly connected to the side wall of the rotating structure; A first limiting structure radially penetrating the rotating structure, the first limiting structure having elasticity and partially protruding from the side wall of the rotating structure; A second limiting structure provided on the side wall of the first support structure in the axial direction, and the second limiting structure protrudes or depresses from the set surface; When the rotating structure is in the initial state, the first limiting structure and the second limiting structure are respectively located on both sides of the first support structure, and the rotating structure is used to rotate relative to the first support structure so that the locking wire is wound thereon; When the first limiting structure and the second limiting structure are on the same side, the first limiting structure and the second limiting structure are used to limit the rotation of the rotating structure.

[0005] Preferably, a first through hole axially penetrating is provided on the first support structure, the first through hole is used for the rotating structure to be inserted, and the diameter of the first through hole is equal to the diameter of the rotating structure; The first limiting structure includes a first limiting part and a second limiting part, the first limiting part and the second limiting part are connected at an angle, and the distance between the mutually remote ends of the first limiting part and the second limiting part is greater than the diameter of the first through hole; When the first limiting structure enters the first through hole, the first limiting portion and the second limiting portion are squeezed by the first through hole to contract into the rotating structure. When the first limiting structure moves out of the first through hole, the first limiting portion and the second limiting portion extend and abut against the side wall of the first supporting structure in the axial direction.

[0006] Preferably, the second limiting structure protrudes from the installation surface. A plurality of second limiting structures are provided and arranged at intervals in the circumferential direction along the side wall of the first supporting structure. When the first limiting structure extends out of the first through hole, the first limiting portion and the second limiting portion extend and are located between two of the second limiting structures; The side wall of the first supporting structure in the axial direction is used to limit the reverse axial movement of the first limiting structure, and the second limiting structure is used to limit the circumferential rotation of the first limiting structure.

[0007] Preferably, a radially penetrating first slot and a second slot are provided on the rotating structure. The first slot and the second slot are arranged perpendicular to each other. The first slot is for the insertion of the first limiting structure, and the second slot is for the insertion of the first pin; When the first pin is inserted into the second slot, the first pin is clamped between the first limiting portion and the second limiting portion. The first pin is used to prevent the first limiting structure from moving out of the first slot.

[0008] Preferably, the second limiting structure includes a first side wall and a second side wall. The first side wall is perpendicular to the side wall of the first supporting structure in the axial direction, and the second side wall is angularly connected to the side wall of the first supporting structure in the axial direction; Along the rotation direction of the rotating structure, the second side wall is arranged upstream of the first side wall. The second side wall gradually inclines away from the first supporting structure. The first side wall is used to limit the reverse rotation of the rotating structure.

[0009] Preferably, a protruding third limiting structure is provided on the rotating structure. The third limiting structure is arranged on the side of the first limiting structure close to the first supporting structure; The third limiting structure is used for circumferentially limiting connection with the spring tube of the thread locking device, so that the spring tube of the thread locking device controls the rotation of the rotating structure.

[0010] Preferably, a fourth limiting structure is provided on the rotating structure. The rotating structure axially penetrates through the fourth limiting structure, and the fourth limiting structure is in interference fit with the side wall of the rotating structure; The fourth limiting structure is arranged on the side of the first limiting structure away from the first supporting structure. The fourth limiting structure is used to prevent the rotating structure from sliding out of the first supporting structure.

[0011] Preferably, a plurality of the third limiting structures are provided and are evenly spaced along the circumferential side wall of the rotating structure. When the end of the spring tube of the wire locking device is inserted between two of the third limiting structures, the rotating structure and the spring tube of the wire locking device are circumferentially limited.

[0012] Preferably, a second supporting structure is further included. The second supporting structure is fixedly connected to the nailing device. The rotating structure axially penetrates through the second supporting structure. The second supporting structure is used to limit the movement of the rotating structure in a direction away from the first supporting structure. In the initial state of the rotating structure, the first limiting structure and the fourth limiting structure are located between the first supporting structure and the second supporting structure. The locking wire is fixedly connected to the rotating structure between the fourth limiting structure and the second supporting structure.

[0013] To achieve the above object, the present invention further provides an annulus repair system, including a wire locking device for annulus repair as described above, and further including a nailing device, a locking wire, a guiding steel cable, and a spring tube of the wire locking device. The guiding steel cable is detachably connected to one end of the rotating structure in the axial direction. The guiding steel cable is arranged inside the spring tube of the wire locking device. The spring tube of the wire locking device is circumferentially and limitedly connected to the rotating structure. A plurality of the nailing devices are provided and are successively nailed into the annulus tissue. The wire locking device is installed on the nailing devices at the two outermost ends among the plurality of nailing devices. The locking wire successively connects the plurality of nailing devices in series. The two ends of the locking wire are correspondingly fixedly connected to the two rotating structures. The annulus repair system is used to synchronously control the rotation of the two spring tubes of the wire locking devices, so as to simultaneously tighten the two ends of the locking wire to make the plurality of nailing devices approach each other.

[0014] Based on this, the beneficial effects of the present invention are as follows: Through the solution of the present invention, the rotating structure is fixedly connected to the nailing device through the first supporting structure. When the rotating structure rotates, it can pull the locking wire and wind it around the rotating structure. By the way of tightening from one of the two nailing devices to the other, the problem of unreliable locking caused by the non - collinearity of the two nailing devices and the wire locking device when tightening the two ends of the nailing devices from the middle in the traditional technology is reduced. At the same time, when the rotating structure rotates to the position, by controlling the axial movement of the rotating structure, the first limiting structure abuts against the second limiting structure, thereby realizing the locking of the rotating structure and completing the locking of the locking wire. The overall operation is simple, and the locking structure is reliable, effectively avoiding the situation of the locking wire loosening. Description of the Drawings

[0015] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings: Figure 1 Schematic structural diagram of a thread-locking device showing an embodiment of the present invention; Figure 2 Schematic structural diagram of a rotating structure showing an embodiment of the present invention; Figure 3 Schematic structural diagram of a first limiting structure showing an embodiment of the present invention; Figure 4 Schematic structural diagram of a first supporting structure showing an embodiment of the present invention; Figure 5 Schematic structural diagram of an annulus repair system showing an embodiment of the present invention; Explanation of reference numerals: 10 - First supporting structure, 101 - First through hole, 20 - Rotating structure, 201 - First slot, 202 - Second slot, 203 - First pin, 204 - Third limiting structure, 205 - Fourth limiting structure, 30 - First limiting structure, 301 - First limiting portion, 302 - Second limiting portion, 303 - Arc-shaped groove, 40 - Second limiting structure, 401 - First side wall, 402 - Second side wall, 50 - Second supporting structure, 60 - Stapling device, 70 - Locking wire, 80 - Guide steel cable, 90 - Thread-locking spring tube. Detailed description of the specific implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0017] The terms used in the embodiments of the present application are merely for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "the", and "said" used in the embodiments of the present application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0018] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application to describe related structures, these related structures should not be limited to these terms. These terms are only used to distinguish the related structures from each other.

[0019] Depending on the context, as used herein, the term "if" can be interpreted as "when" or "while". Similarly, depending on the context, the phrase "if it is determined" can be interpreted as "when it is determined" or "when detecting (the stated condition or event)".

[0020] It should be noted that the orientation terms such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described from the angles shown in the drawings and should not be construed as limitations on the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is formed "on" or "under" another element, it can not only be directly formed "on" or "under" another element, but also be indirectly formed "on" or "under" another element through an intermediate element.

[0021] Figure 1 Schematic structural diagram of a thread-locking device showing an embodiment of the present invention, Figure 2 Schematic structural diagram of a rotating structure showing an embodiment of the present invention, Figure 3 Schematic structural diagram of a first limiting structure showing an embodiment of the present invention, as Figures 1 - 3 shown, a thread-locking device for annuloplasty of the present invention includes: A first support structure 10, which is fixedly connected to a stapling device 60; A rotating structure 20, which axially penetrates the first support structure 10 and is movably connected to the first support structure 10, and one end of a locking wire 70 is fixedly connected to the side wall of the rotating structure 20; A first limiting structure 30, which radially penetrates the rotating structure 20, the first limiting structure 30 has elasticity and partially protrudes from the side wall of the rotating structure 20; A second limiting structure 40, which is arranged on the side wall of the first support structure 10 in the axial direction, and the second limiting structure 40 protrudes or depresses from the set surface; When the rotating structure 20 is in the initial state, the first limiting structure 30 and the second limiting structure 40 are respectively located on both sides of the first support structure 10, and the rotating structure 20 is used to rotate relative to the first support structure 10 so that the locking wire 70 is wound thereon; When the first limiting structure 30 and the second limiting structure 40 are on the same side, the first limiting structure 30 and the second limiting structure 40 are used to limit the rotation of the rotating structure 20.

[0022] Specifically, the rotating structure 20 is supported by the first support structure 10 on the stapling device 60, so that when the rotating structure 20 rotates to pull the locking wire 70, one stapling device 60 at a position pulls the other, avoiding the problem of incomplete tightening caused by the non - collinearity of the three components of the stapling device 60, the wire locking device, and the stapling device 60 when the wire locking device skews due to pulling the two stapling devices 60 on both sides from the middle position in the traditional technology, and improving the effect of annulus repair.

[0023] And when the locking wire 70 is pulled in place, by axially moving the rotating structure 20, the first limiting structure 30 enters the same side as the second limiting structure 40, so that the first limiting structure 30 abuts against the second limiting structure 40, realizing circumferential limitation, and further preventing the rotating structure 20 from rotating in the reverse direction, effectively avoiding the loosening of the locking wire 70 after the operation and improving the effect of annulus repair.

[0024] Furthermore, as Figure 2 、 3 shown, an axially penetrating first through - hole 101 is provided on the first support structure 10, and the first through - hole 101 is used for the rotating structure 20 to be inserted. The diameter of the first through - hole 101 is equal to the diameter of the rotating structure 20; The first limiting structure 30 includes a first limiting part 301 and a second limiting part 302. The first limiting part 301 and the second limiting part 302 are connected at an angle. The distance between the mutually - far - apart ends of the first limiting part 301 and the second limiting part 302 is greater than the diameter of the first through - hole 101; When the first limiting structure 30 enters the first through - hole 101, the first limiting part 301 and the second limiting part 302 are squeezed by the first through - hole 101 to shrink into the rotating structure 20. When the first limiting structure 30 moves out of the first through - hole 101, the first limiting part 301 and the second limiting part 302 extend and abut against the axial side wall of the first support structure 10.

[0025] Specifically, the first limiting structure 30 can be set as a cone, so that one end of the first limiting part 301 and the second limiting part 302 is connected at an angle, and the other end is mutually far - apart. When the first limiting structure 30 is inserted into the rotating structure 20, the mutually - far - apart ends of the first limiting part 301 and the second limiting part 302 respectively extend from both sides of the rotating structure 20.

[0026] When the rotating structure 20 axially moves towards the direction close to the first support structure 10, one end of the first limiting portion 301 and the second limiting portion 302 that are away from each other is extruded by the first through hole 101, and they move closer to each other, and then contract into the rotating structure 20 and enter the first through hole 101. When the rotating structure 20 further axially moves, one end of the first limiting portion 301 and the second limiting portion 302 that are away from each other extends out of the first through hole 101, and the first limiting portion 301 and the second limiting portion 302 stretch and reset under the action of elastic force. Then, the side walls of the first limiting portion 301 and the second limiting portion 302 facing the first support structure 10 are abutted against the first support structure 10, thereby preventing the rotating structure 20 from moving axially in the reverse direction.

[0027] Meanwhile, the second limiting structure 40 protrudes from the set surface. There are multiple second limiting structures 40 and they are arranged at intervals along the circumferential direction of the side wall of the first support structure 10. When the first limiting structure 30 extends out of the first through hole 101, the first limiting portion 301 and the second limiting portion 302 stretch and are located between the two second limiting structures 40.

[0028] In this way, the axial side wall of the first support structure 10 can be abutted against the first limiting structure 30, thereby restricting the first limiting structure 30 from moving axially in the reverse direction, and further restricting the rotating structure 20 from moving axially in the reverse direction. After the first limiting structure 30 extends out of the first through hole 101, it is located between the two second limiting structures 40. The second limiting structure 40 limits the circumferential rotation of the first limiting structure 30, thereby restricting the circumferential rotation of the rotating structure 20, and realizing the locking of the rotating structure 20.

[0029] Further, as Figure 2 shown, a first slot 201 and a second slot 202 that penetrate radially are provided on the rotating structure 20. The first slot 201 and the second slot 202 are arranged perpendicular to each other. The first slot 201 is used for the first limiting structure 30 to be inserted, and the second slot 202 is used for the first pin 203 to be inserted; When the first pin 203 is inserted into the second slot, the first pin 203 is clamped between the first limiting portion 301 and the second limiting portion 302. The first pin 203 is used to prevent the first limiting structure 30 from moving out of the first slot 201.

[0030] Specifically, arc-shaped grooves 303 can be respectively provided on the side walls of the first limiting portion 301 and the second limiting portion 302 that face each other. When the first pin 203 is clamped between the first limiting portion 301 and the second limiting portion 302, the first pin 203 is inserted into the two arc-shaped grooves 303, so that the arc-shaped grooves 303 limit the forward and reverse axial movement of the first limiting structure 30 in the first slot 201, preventing the first limiting structure 30 from moving out of the first slot, and realizing the circumferential and axial limiting of the rotating structure 20 while limiting the circumferential and axial directions of the first limiting structure 30.

[0031] Further, Figure 4 The schematic structural diagram of the first support structure showing an embodiment of the present invention is as Figure 4 shown: The second limiting structure 40 includes a first side wall 401 and a second side wall 402. The first side wall 401 is perpendicular to the axial side wall of the first support structure 10, and the second side wall 402 is angularly connected to the axial side wall of the first support structure 10; Along the rotation direction of the rotating structure 20, the second side wall 402 is disposed upstream of the first side wall 401, and the second side wall 402 gradually inclines away from the first support structure 10. The first side wall 401 is used to limit the reverse rotation of the rotating structure 20.

[0032] Specifically, when the first limiting structure 30 extends out of the first through hole 101, the first limiting portion 301 and the second limiting portion 302 are located between the side walls of the two second limiting structures 40, specifically between the second side wall 402 of one second limiting structure 40 and the first side wall 401 of the other second limiting structure 40.

[0033] By setting the first side wall 401 perpendicular to the first support structure 10, when the rotating structure 20 rotates in the reverse direction, the first side wall 401 can limit it. And the second side wall 402 is angularly connected to the first support structure 10. When the first limiting structure 30 is located between the second limiting structures 40, it is found that the locking wire 70 is not completely locked. The doctor can further control the rotating structure 20 to rotate, further tighten the locking wire 70, and reserve an adjustable space.

[0034] Further, as Figure 2 shown, a protruding third limiting structure 204 is provided on the rotating structure 20. The third limiting structure 204 is disposed on the side of the first limiting structure 30 close to the first support structure 10; The third limiting structure 204 is used for circumferentially limiting connection with the locking wire spring tube 90 to enable the locking wire spring tube 90 to control the rotation of the rotating structure 20.

[0035] Specifically, a plurality of third limiting structures 204 are provided and are evenly spaced along the circumferential side wall of the rotating structure 20. When the locking wire spring tube 90 is inserted between two third limiting structures 204, the rotating structure 20 and the locking wire spring tube 90 are circumferentially limited. Furthermore, the rotation of the rotating structure 20 can be controlled by rotating the locking wire spring tube 90 to wind and tighten the locking wire 70.

[0036] Further, a fourth limiting structure 205 is provided on the rotating structure 20. The rotating structure 20 penetrates through the fourth limiting structure 205, and the fourth limiting structure 205 is in interference fit with the side wall of the rotating structure 20; The fourth limiting structure 205 is disposed on the side of the first limiting structure 30 away from the first support structure 10. With this arrangement, when the rotating structure 20 axially moves towards the first support structure 10, the fourth limiting structure 205 can prevent the rotating structure 20 from slipping out of the first support structure 10.

[0037] Furthermore, a suture locking device for annulus repair according to the present invention further includes a second support structure 50. The second support structure 50 is fixedly connected to the stapling device 60. The rotating structure 20 axially penetrates through the second support structure 50, and the second support structure 50 is used to limit the movement of the rotating structure 20 in the direction away from the first support structure 10. In the initial state of the rotating structure 20, the first limiting structure 30 and the fourth limiting structure 205 are located between the first support structure 10 and the second support structure 50. The locking suture 70 is fixedly connected to the rotating structure 20 between the fourth limiting structure 205 and the second support structure 50. Specifically, the rotating structure 20 is formed by two rod bodies with different diameters. The two rod bodies are fixedly connected to each other, and the diameter of one rod body is larger than that of the other rod body. The first support structure 10 is for the insertion of the larger-diameter rod body, and the second support structure 50 is for the insertion of the smaller-diameter rod body. Moreover, the second support structure 50 can abut against the larger-diameter rod body to limit the axial movement of the rotating structure 20.

[0038] Furthermore, Figure 5 Schematically showing the structural schematic diagram of an annulus repair system according to an embodiment of the present invention, as Figure 5 shown: To achieve the above object, the present invention further provides an annulus repair system, including a suture locking device for annulus repair as described above, and further including a stapling device 60, a locking suture 70, a guide steel cable 80, and a suture locking spring tube 90. The guide steel cable 80 is detachably connected to one axial end of the rotating structure 20. The guide steel cable 80 is disposed inside the suture locking spring tube 90, and the suture locking spring tube 90 is circumferentially and limit-connected to the rotating structure 20. A plurality of stapling devices 60 are provided and are sequentially nailed into the annulus tissue. The suture locking device is installed on the stapling devices 60 at the two outermost ends among the plurality of stapling devices 60. The locking suture 70 sequentially connects a plurality of stapling devices 60 in series, and both ends of the locking suture 70 are correspondingly fixedly connected to two rotating structures 20. The annulus repair system is used to synchronously control the rotation of two suture locking spring tubes 90 to simultaneously tighten both ends of the locking suture 70 so that a plurality of stapling devices 60 approach each other to constrict the annulus to prevent.

[0039] Specifically, in the annulus repair surgery, a plurality of stapling devices 60 are sequentially implanted on the annulus tissue, and a wire locking device is installed on the stapling devices 60 at the two outermost ends of the entire stapling device 60. At this time, the locking wire 70 sequentially connects a plurality of stapling devices 60 in series, and the two ends are respectively fixedly connected to the rotating structures 20 at both ends. The guiding steel cable 80 is fixedly connected to the end of the rotating structure 20, and the wire locking device spring tube 90 is sleeved on the rotating structure 20 and axially limitedly connected to the third limiting structure 204 thereon. When it is necessary to contract the annulus after stapling, by simultaneously manipulating the two wire locking device spring tubes 90 and simultaneously controlling the rotation of the rotating structures 20 at both ends, the locking wire 70 is pulled from both ends at the same time, so that a plurality of stapling devices 60 approach each other to contract the annulus tissue. After the locking wire 70 is tightened, by pulling the guiding steel cable 80, the rotating structure 20 moves axially, so that the first limiting structure 30 and the second limiting structure 40 are located on the same side, and circumferential limitation is achieved between them, thereby achieving the locking effect of the rotating structure 20. If it is found that the locking wire 70 is still not tightened in place, the rotation of the rotating structure 20 can be further controlled to achieve further tightening. After tightening in place, the guiding steel cable 80 and the wire locking device spring tube 90 are disassembled from the wire locking device and withdrawn from the body to complete the annulus repair surgery.

[0040] In summary, in the present invention, by installing the rotating structure 20 on the stapling device 60, setting the first limiting structure 30 on the rotating structure 20, and setting the second limiting structure 40 on the first support structure 10 for installing the stapling device 60, when the two are on both sides of the first support structure 10, the rotating structure 20 can rotate arbitrarily to tighten the locking wire 70 and thus contract the annulus tissue. After tightening in place, by axially moving the rotating structure 20, the first limiting structure 30 is moved to the same side as the second limiting structure 40, and then located between the two second limiting structures 40, and thus the circumferential rotation is restricted by the second limiting structure 40, thereby achieving the locking of the rotating structure 20. The overall locking operation is simple, and the limitation is achieved through the structure, which can reduce the loosening of the locking wire 70 after the operation.

[0041] The above description is only a preferred embodiment of the present application. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosure concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. A suture-locking device for annulus repair, characterized in that, Comprising: A first support structure fixedly connected to the nailing device; A rotating structure axially penetrating the first support structure and movably connected to the first support structure, with one end of the locking wire fixedly connected to the side wall of the rotating structure; A first limiting structure radially penetrating the rotating structure, the first limiting structure being elastic and partially protruding from the side wall of the rotating structure; A second limiting structure provided on the axial side wall of the first support structure, and the second limiting structure protruding or recessed from the setting surface; When the rotating structure is in the initial state, the first limiting structure and the second limiting structure are respectively located on both sides of the first support structure, and the rotating structure is used to rotate relative to the first support structure so that the locking wire is wound thereon; When the first limiting structure and the second limiting structure are on the same side, the first limiting structure and the second limiting structure are used to limit the rotation of the rotating structure.

2. The suture locking device for annulus repair according to claim 1, characterized in that An axially penetrating first through hole is provided on the first support structure for the rotating structure to be inserted, and the diameter of the first through hole is equal to the diameter of the rotating structure; The first limiting structure includes a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are angularly connected, and the distance between the mutually remote ends of the first limiting portion and the second limiting portion is greater than the diameter of the first through hole; When the first limiting structure enters the first through hole, the first limiting portion and the second limiting portion are squeezed by the first through hole to contract into the rotating structure, and when the first limiting structure moves out of the first through hole, the first limiting portion and the second limiting portion extend and abut against the axial side wall of the first support structure.

3. The suture device for annulus repair according to claim 2, characterized in that, The second limiting structure protrudes from the setting surface, and a plurality of the second limiting structures are provided and spaced circumferentially along the side wall of the first support structure. When the first limiting structure protrudes from the first through hole, the first limiting portion and the second limiting portion extend and are located between two of the second limiting structures; The axial side wall of the first support structure is used to limit the reverse axial movement of the first limiting structure, and the second limiting structure is used to limit the circumferential rotation of the first limiting structure.

4. The suture device for annulus repair according to claim 2, wherein, A first slot and a second slot are radially provided on the rotating structure, the first slot and the second slot are perpendicularly arranged, the first slot is for the first limiting structure to be inserted, and the second slot is for a first pin to be inserted; When the first pin is inserted into the second slot, the first pin is clamped between the first limiting portion and the second limiting portion, and the first pin is used to prevent the first limiting structure from moving out of the first slot.

5. A suture locking device for annulus repair according to claim 3, characterized in that, The second limiting structure includes a first side wall and a second side wall, the first side wall is perpendicular to the axial side wall of the first support structure, and the second side wall is angularly connected to the axial side wall of the first support structure; Along the rotation direction of the rotating structure, the second side wall is arranged upstream of the first side wall, the second side wall gradually inclines away from the first support structure, and the first side wall is used to limit the reverse rotation of the rotating structure.

6. The suture locking device for annulus repair according to claim 1, wherein, A convex third limiting structure is provided on the rotating structure, and the third limiting structure is arranged on one side of the first limiting structure close to the first supporting structure; The third limiting structure is used for circumferentially limiting connection with the spring tube of the thread locking device, so that the spring tube of the thread locking device controls the rotation of the rotating structure.

7. The suture locking device for annulus repair according to claim 6, wherein, A fourth limiting structure is provided on the rotating structure, and the rotating structure axially penetrates the fourth limiting structure, and the fourth limiting structure is in interference fit with the side wall of the rotating structure; The fourth limiting structure is arranged on one side of the first limiting structure away from the first supporting structure, and the fourth limiting structure is used to prevent the rotating structure from sliding out of the first supporting structure.

8. A suture locking device for annulus repair according to claim 6, characterized in that, A plurality of the third limiting structures are provided and are evenly spaced along the circumferential side wall of the rotating structure. When the end of the spring tube of the thread locking device is inserted between two of the third limiting structures, the rotating structure and the spring tube of the thread locking device are circumferentially limited.

9. A suture locking device for annulus repair according to claim 7, characterized in that, It further includes a second supporting structure, the second supporting structure is fixedly connected with the nailing device, the rotating structure axially penetrates the second supporting structure, and the second supporting structure is used to limit the rotating structure from moving in a direction away from the first supporting structure; When the rotating structure is in the initial state, the first limiting structure and the fourth limiting structure are located between the first supporting structure and the second supporting structure, and the locking wire is fixedly connected to the rotating structure between the fourth limiting structure and the second supporting structure.

10. An annulus repair system, characterized in that, It includes a wire locking device for annulus repair according to any one of claims 1-9, and further includes a nailing device, a locking wire, a guiding steel cable and a spring tube of the wire locking device; The guiding steel cable is detachably connected to one end of the rotating structure axially, the guiding steel cable is arranged in the spring tube of the wire locking device, and the spring tube of the wire locking device is circumferentially limitedly connected to the rotating structure; A plurality of the nailing devices are provided and are sequentially nailed into the annulus tissue. The wire locking device is installed on the two outermost nailing devices among the plurality of nailing devices. The locking wire sequentially connects the plurality of nailing devices in series, and the two ends of the locking wire are correspondingly fixedly connected to two of the rotating structures; The annulus repair system is used to synchronously control the rotation of the two spring tubes of the wire locking devices to simultaneously tighten the two ends of the locking wire so that the plurality of nailing devices approach each other.

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