A wire locking structure

Abstract

The present application relates to a kind of lock line structures, including sheath, be provided in the peg head subassembly of sheath, movably be provided in sheath and with peg head subassembly detachable connection top rod, using the way of first pulling top rod lock knot peg head subassembly and suture to push top rod at least part peg head subassembly to push out to complete the lock knot of suture, pull top rod to the proximal end and realize the process of lock knot suture, the force of the distal end of top rod to peg head subassembly is towards proximal end in this process, it is impossible to push out peg head subassembly from sheath, therefore the movement of top rod this direction is combined with the process of lock knot suture, can ensure that peg head subassembly is better lock knot suture and then push out peg, it is not pushed out at least part peg head subassembly in the process of peg head subassembly and suture lock knot, effectively solve the technical problem of how to guarantee suture better lock knot in prior art.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a locking wire structure. Background Technology

[0002] In general surgical procedures, sutures need to be knotted and secured. Since surgical procedures are typically performed under direct vision by the surgeon, this knotting is usually done manually. However, minimally invasive and interventional surgeries are becoming increasingly widespread due to their advantages of less trauma and faster recovery. Taking transcatheter interventional surgery as an example, catheters and other instruments are inserted into the patient's body to reach the predetermined location and perform suturing. After suturing, a knotting instrument is used to capture the suture and insert it to the suture site. The knotting instrument is then used remotely outside the patient's body to tie the suture, cut the knotted suture, and withdraw the cut suture along with the knotting instrument, completing the procedure.

[0003] In existing equipment, the pin is inserted into the suture head by pushing the push rod to the far end to lock the suture thread passing through the pin hole. However, since the suture head is stuck in the seat hole of the suture seat, there is a lot of resistance when the pin is inserted into the suture head. The suture head may be pushed out of the suture seat due to the resistance before the pin is fully inserted, resulting in the suture head being pushed out without being properly locked. Summary of the Invention

[0004] One technical problem solved by this invention is how to improve the degree of suture knotting.

[0005] A suture locking structure includes a sheath, a plug assembly disposed within the sheath, and a push rod movably disposed within the sheath and detachably connected to the plug assembly. The plug assembly has a threading channel extending through its proximal and distal ends for inserting a suture. The push rod is movably disposed within the threading channel. The push rod has a locking process and a pushing process. During the locking process, the distal end of the push rod can move relative to the threading channel towards its proximal end, such that the plug assembly connected to the push rod locks the suture located within the threading channel. During the pushing process, the push rod can move distally to push at least a portion of the plug assembly out of the sheath.

[0006] One technical advantage of one embodiment of the present invention is that the suture is locked by first pulling the push rod to lock the suture head assembly and the suture, and then pushing the push rod to push out at least part of the suture head assembly. Pulling the push rod achieves the process of locking the suture. During this process, the force exerted by the distal end of the push rod on the suture head assembly is directed towards the proximal end, making it impossible for the suture head assembly to be pushed out of the sheath. Therefore, by combining the movement of the push rod in this direction with the process of locking the suture, it can be ensured that only the suture is locked with the suture head assembly during the pulling of the push rod, and the suture head assembly is not pushed out of the sheath. Pushing the push rod achieves the process of pushing out at least part of the suture head assembly from the sheath. Different movement directions of the push rod correspond to different sequences of operation steps, which can avoid the process of locking the suture affecting or interfering with the process of pushing out at least part of the suture head assembly. Therefore, this locking structure allows the plug assembly to lock the suture well before the plug is pushed out, preventing at least part of the plug assembly from being pushed out during the locking process between the plug assembly and the suture. This improves the degree of suture locking, thereby greatly improving the suturing effect of the sutured tissue. At the same time, it can greatly avoid the risk of the plug assembly falling off in the body due to poor locking effect, thus improving safety. Attached Figure Description

[0007] Figure 1 A schematic diagram of a locking wire structure;

[0008] Figure 2 This is a schematic diagram of an exploded structure of a locking wire structure.

[0009] Figure 3 This is a cross-sectional view of the plug assembly and the sheath.

[0010] Figure 4 This is a schematic diagram of the drive device.

[0011] Figure 5 This is a cross-sectional view of the drive unit and the handle;

[0012] Figure 6 for Figure 5 A magnified view of part A in the image;

[0013] Figure 7 This is a schematic diagram of another embodiment of the second driving structure;

[0014] Figure 8 This is a schematic diagram of another embodiment of the plug assembly.

[0015] In the attached image:

[0016] 1. Sheath; 10. Thread hole; 2. Bolt head assembly; 21. Bolt sleeve; 211. Pin hole; 212. Annular protrusion; 213. Stop; 214. Recess; 215. Limiting groove; 22. Bolt pin; 221. Main body; 222. Limiting part; 223. Protrusion; 224. Inclined surface; 225. Vertical surface; 200. Threading channel; 23. Bolt seat; 231. Seat hole; 232. First stepped section; 233. Second stepped section; 234. Slot; 235. Stop groove; 201. Suture thread; 3. Top rod; 31. Threaded post; 4. Handle; 41. Upper housing; 42. Lower housing; 421. First slide; 422. First concave surface; 4 23. Second slide; 424. Second concave surface; 43. Stress-relieving sleeve; 431. Fixing part; 432. Tubular part; 401. Accommodating cavity; 402. First fixing groove; 5. First driving mechanism; 51. Pushing member; 511. Connecting member; 512. First through hole; 513. Sliding piece; 514. Protrusion; 52. Movable part; 521. Movable block; 522. Second through hole; 523. Locking hole; 524. Annular groove; 6. Knob; 61. Movable groove; 7. Lead wire; 71. Lead wire handle; 711. Cantilever part; 72. Lead wire; 8. Locking pin; 9. Locking nut; 91. Second threaded hole; 92. Accommodating channel; 100. Locking structure. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0019] It should be noted that the terms "distal" and "proximal" are used as directional terms, which are commonly used in the field of interventional medical devices. "Distal" refers to the end furthest from the operator during the procedure, while "proximal" refers to the end closest to the operator. Axial direction refers to the direction parallel to the line connecting the center of the distal and proximal ends of the medical device; radial direction refers to the direction perpendicular to the aforementioned axial direction.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a suture locking structure 100, including a sheath 1, a plug assembly 2 disposed at the distal end of the sheath 1, a push rod 3 movably disposed within the sheath 1 and detachably connected to the plug assembly 2, a handle 4, and a driving device. The plug assembly 2 has a threading channel 200 extending through its proximal and distal ends, the threading channel 200 for inserting a suture 201, and the push rod 3 movably disposed within the threading channel 200; the push rod 3 has an initial state, a locking process, and an ejection process. In the initial state, the distal end of the push rod 3 is located on one side of the distal end of the plug assembly 2; in the locking process, the distal end of the push rod 3 can move towards the proximal end relative to the threading channel 200 so that the plug assembly 2 connected to the push rod 3 locks the suture 201 located within the threading channel 200; in the ejection process, the push rod 3 can move distally to eject at least a portion of the plug assembly 2 from the sheath 1.

[0021] The proximal end of the sheath 1 is connected to the handle 4, and a drive device is movably mounted on the handle 4. During operation, the drive device can drive the push rod 3 to move axially along the sheath 1. In other embodiments, the locking structure 100 may not include the handle 4, as long as the push rod 3 can be controlled.

[0022] In this embodiment, from the initial state to the locking process, the locking of the suture 201 is completed by first pulling the push rod 3 to lock the suture 201 with the plug assembly 2, and then pushing the push rod 3 to push out at least part of the plug assembly 2. Pulling the push rod 3 towards the proximal end achieves the locking of the suture 201. During this process, the force exerted by the distal end of the push rod 3 on the plug assembly 2 is directed towards the proximal end, making it impossible for the plug assembly 2 to be pushed out of the sheath 1. Therefore, by combining the movement of the push rod 3 towards the proximal end with the locking of the suture 201, it can be ensured that only the suture 201 is locked with the plug assembly 2 during the pulling of the push rod 3, without pushing the plug assembly 2 out of the sheath 1. From the locking process to the pushing process, pushing towards the distal end... The movable push rod 3 realizes the process of pushing at least part of the plug assembly 2 out of the sheath tube 1. Different movement directions of the push rod 3 correspond to different sequence of operation steps, which can avoid the process of locking the suture 201 affecting or interfering with the process of pushing out part of the plug assembly 2. Therefore, the locking structure 100 of this embodiment can make the plug assembly 2 better lock the suture 201 before pushing out at least part of the plug assembly 2. It will not push out at least part of the plug assembly 2 during the process of locking the plug assembly 2 with the suture 201, which can improve the degree of locking of the suture 201, thereby greatly improving the suturing effect of the sutured tissue. At the same time, it can greatly avoid the risk of the plug assembly 2 falling off in the body due to poor locking effect, thereby improving safety.

[0023] It should be noted that, as Figure 3As shown, the initial state of the push rod 3 refers to the state in which only the push rod 3 and the suture 201 are threaded through the suture channel 200. At this time, the suture 201 can freely enter and exit the suture channel 200, or the suture 201 can freely move within the suture channel 200. The locking process of the push rod 3 refers to the state in which the suture channel 200 is closed and the suture 201 is locked. At this time, the suture 201 is fixedly connected to at least one component of the plug assembly 2. Understandably, the plug assembly 2 can be provided with various structural forms to realize the transition from the initial state to the locking process. For example, in some embodiments, the plug assembly 2 can be deformed as a whole under the compression of the distal end of the push rod 3, causing the suture channel 200 to bend and deform, and the inner wall of the suture channel 200 to deform radially and clamp and fix the suture 201. Alternatively, in other embodiments, through the cooperation between different components in the plug assembly 2, some components in the plug assembly 2 are displaced and blocked by the squeezing action of the top rod 3, so as to clamp and fix the suture 201 in the suture channel 200.

[0024] Furthermore, such as Figures 2 to 3 As shown, the plug assembly 2 includes a plug sleeve 21 detachably disposed within the sheath 1 and a plug pin 22 installable within the plug sleeve 21. The plug sleeve 21 has a pin hole 211 extending through its proximal and distal ends. The pin hole 211 is the distal portion of the thread channel 200. The plug pin 22 is detachably disposed on the distal end of the push rod 3. The suture 201 can pass through the pin hole 211. During the locking process, the plug pin 22 can be inserted into the pin hole 211 from the distal end of the plug sleeve 21 to lock the suture 201. During the ejection process, the push rod 3 can eject the plug pin 22 and the plug sleeve 21 out of the sheath 1. By movably setting the push rod 3 within the pin hole 211 of the sleeve 21, and since the pin 22 is located at the distal end of the push rod 3, when the suture 201 has not yet been secured, the pin 22 is located on one side of the distal end of the sleeve 21, and the suture 201 passes through the pin hole 211. When it is necessary to secure the suture 201, the push rod 3 is first pulled proximally so that the pin 22 at the distal end of the push rod 3 is inserted into the pin hole 211 from one side of the distal end of the sleeve 21. Since the force exerted by the pin 22 on the sleeve 21 is from the distal end to the proximal end, there is no need to worry about the sleeve 21 being pushed out of the sheath 1 during the securing of the suture 201. This ensures that the pin 22 and the sleeve 21 securely secure the suture 201 before the sleeve 21 is pushed out, and the sleeve 21 will not be pushed out during the securing process of the pin 22 and the sleeve 21.

[0025] During the ejection process, since the pin 22 is detachably located at the far end of the push rod 3, the push rod 3 can be disengaged from the pin 22 while inside the sheath tube 1 before pushing the push rod 3 to eject the locked pin head assembly 2 from the sheath tube 1. Alternatively, the locked pin head assembly 2 can be ejected from the sheath tube 1 first, and then the push rod 3 can be disengaged from the pin 22, thus completing the ejection of the pin 22 and the pin sleeve 21, making the operation more flexible.

[0026] It should be noted that the pin 22 can be detachably connected to the distal end of the push rod 3 in various ways. For example, in some embodiments, the distal end of the push rod 3 is provided with a clamp that can engage the proximal end of the pin 22 or a structure for the clamp to engage can be provided at the proximal end of the pin 22. In the initial state and during the locking process, the clamp locks and engages the pin 22. During the push-out process, the clamp releases the pin 22, and the push rod 3 can be disconnected from the pin 22. This makes it convenient to choose to disconnect the connection inside the sheath 1 or after the sleeve 21 is pushed out.

[0027] Furthermore, such as Figures 2 to 3 As shown, the suture head assembly 2 also includes a suture seat 23, which is disposed inside and fixedly connected to the sheath 1. The suture seat 23 has a seat hole 231 extending through its proximal and distal ends. The suture sleeve 21 is detachably connected to the suture seat 23 within the seat hole 231. The seat hole 231 communicates with the pin hole 211 and together defines the suture passage 200. The outer circumferential surface of the sheath 1 is provided with a suture hole 10, through which the suture 201 can extend into the sheath 1 via the suture passage 200 and extend out of the sheath 1 through the suture hole 10. In one embodiment, the suture head assembly 2 includes a suture sleeve 21, a suture pin 22, and a suture seat 23. The part of the suture head assembly 2, namely the suture sleeve 21 and the suture pin 22, is pushed out by the push rod 3. In another embodiment, the suture head assembly 2 may only include the suture sleeve 21 and the suture pin 22, and the entire suture head assembly 2 is pushed out by the push rod 3.

[0028] Specifically, along the axial direction of the sheath tube 1, the outer peripheral surface of the plug seat 23 is set in a stepped shape, including a first stepped segment 232 and a second stepped segment 233 connected together. The first stepped segment 232 is located at the distal end, and the second stepped segment 233 is located at the proximal end. The outer diameter of the first stepped segment 232 is larger than the outer diameter of the second stepped segment 233. The sheath tube 1 is sleeved on the outside of the first stepped segment 232, and a gap is formed between the inner wall surface of the sheath tube 1 and the outer peripheral surface of the second stepped segment 233. This gap is used to accommodate glue, so that the sheath tube 1 and the plug seat 23 have better connection strength after the glue solidifies.

[0029] Furthermore, a groove 234 is provided within the seat hole 231. The groove 234 is annular and extends circumferentially along the seat hole 231. The outer circumferential surface of the proximal end of the sleeve 21 is provided with an annular protrusion 212 that engages with the groove 234. The engagement of the annular protrusion 212 with the groove 234 allows the sleeve 21 to engage with the seat 23. When the sleeve 21 is subjected to a thrust toward the distal end, and the thrust is greater than the holding force of the annular protrusion 212 and the groove 234, the sleeve 21 can detach from the seat 23. To ensure smooth detachment of the sleeve 21, the distal end of the annular protrusion 212 and the distal sidewall of the groove 234 are both provided as inclined surfaces 224.

[0030] Furthermore, a stop portion 213 is provided on the outer peripheral surface of the distal end of the sleeve 21, and a stop groove 235 is provided on the distal end face of the seat 23. The proximal end face of the stop portion 213 is engaged with the side wall of the proximal end of the stop groove 235 to prevent the sleeve 21 from being inserted too deeply into the seat 23 when it is assembled into the seat 23.

[0031] In this embodiment, as Figure 3 As shown, the distal end of the pin hole 211 has a flared, trumpet-shaped structure to facilitate the insertion of the bolt 22 into the pin hole 211 and provide guidance. The bolt 22 includes a cylindrical main body 221, a limiting part 222 located at the distal end of the main body 221, and several sets of protrusions 223 arranged around the outer circumference of the main body 221. The proximal end of the main body 221 is detachably connected to the push rod 3. The outer diameter of the protrusion 223 near the proximal end of the main body 221 is smaller than the outer diameter of the other protrusions 223, which provides guidance during the insertion of the bolt 22 into the pin hole 211. The proximal end face of the protrusion 223 is set as an inclined surface 224, and the maximum outer diameter of the protrusion 223 is larger than the inner diameter of the pin hole 211. When the main body 221 of the pin 22 is inserted into the pin hole 211, the protrusion 223 elastically deforms and is radially compressed. The elastic force generated by the deformation of the protrusion 223 securely fixes the pin 22 within the pin hole 211, and locks the suture 201 passing through the pin hole 211. The outer diameter of the limiting part 222 is larger than the outer diameter of the pin hole 211, causing the distal end face of the limiting part 222 to abut against the distal end face of the sleeve 21, thereby limiting the depth of the pin 22 inserted into the sleeve 21. In this embodiment, when the proximal end face of the limiting part 222 abuts against the distal end face of the sleeve 21, the suture 201 can be effectively locked by the pin 22 and the sleeve 21. In other embodiments, during the process of the push rod 3 driving the pin 22 to be inserted into the sleeve 21 in the proximal direction, at a certain position, the push rod 3 cannot drive the pin 22 to continue moving proximal. At this time, it can be considered that the suture 201 can be well locked by the pin 22 and the sleeve 21.

[0032] In another embodiment, the sleeve 21 is more easily deformed than the pin 22. The outer diameter of the pin 22 is larger than the inner diameter of the pin hole 211 of the sleeve 21. When the pin 22 is inserted into the sleeve 21, the sleeve 21 can expand and deform, and the inner diameter of the pin hole 211 can be enlarged by the pin 22, so that the pin 22 can be firmly fixed in the pin hole 211.

[0033] Furthermore, in the initial state and during the locking process, a gap is provided between the distal end of the sleeve 21 and the distal end of the sheath 1, the length of which is at least the axial length of the pin 22. Since the pin 22 is located on one side of the distal end of the sleeve 21 in the initial state, and a gap is provided between the distal end of the sleeve 21 and the distal end of the sheath 1, with the gap length being at least the axial length of the pin 22, when the proximal end of the pin 22 is in the same position as the distal end of the sleeve 21, the distal end of the pin 22 is also in the same position as the distal end of the sheath 1. The pin 22 is then retracted into the sheath 1, thus protecting the pin 22 and preventing it from being exposed outside the sheath 1 during delivery and damaging internal tissues. In this embodiment, the end face of the distal end of the sleeve 21 can be in the same position as the end face of the distal end of the base 23. In other embodiments, the end face of the distal end of the sleeve 21 can be closer to the distal end than the end face of the distal end of the base 23.

[0034] Furthermore, such as Figure 1 and Figure 2 As shown, the driving device includes a first driving mechanism 5, which includes a pushing member 51 and a movable member 52 disposed on the proximal side of the pushing member 51. The pushing member 51 is axially slidably disposed on the handle 4, and the movable member 52 is movably disposed in the handle 4. The proximal end of the push rod 3 enters from the distal end of the pushing member 51 and exits from the proximal side of the pushing member 51. The proximal end of the push rod 3, which exits from the proximal side of the pushing member 51, is connected to the movable member 52, and the movable member 52 can move relative to the handle 4 together with the push rod 3. By axially sliding the pushing member 51 on the handle 4 and movably disposing the movable member 52 in the handle 4, and because the movable member 52 is disposed on the proximal side of the pushing member 51, and the proximal end of the push rod 3 enters from the distal end of the pushing member 51 and exits from the proximal side of the pushing member 51, and the proximal end of the push rod 3, which exits from the proximal side of the pushing member 51, is connected to the movable member 52, the push rod 3 can be moved axially by pushing the pushing member 51 back and forth to move the movable member 52.

[0035] Furthermore, such as Figure 3 As shown, the distal end of the push rod 3 is provided with a threaded post 31, and the proximal end of the pin 22 is provided with a first threaded hole. The threaded post 31 can be threadedly connected to the first threaded hole, and the movable part 52 can rotate around the axial direction of the push rod 3. The distal end of the push rod 3 is threadedly connected to the proximal end of the pin 22 through the threaded post 31, realizing a detachable connection between the push rod 3 and the pin 22. Since the movable part 52 can rotate around the axial direction of the push rod 3, the connection state between the push rod 3 and the pin 22 can be switched by controlling the rotation of the movable part 52.

[0036] Furthermore, such as Figure 1 and Figure 4As shown, the drive device also includes a second drive mechanism for driving the movable part 52 to rotate. The second drive mechanism includes a knob 6 rotatably mounted on the handle 4. The movable part 52 is coaxially mounted inside the knob 6. One of the movable part 52 and the knob 6 has a first sliding structure extending along the axial direction of the push rod 3, and the other has a second sliding structure slidably connected to the first sliding structure. Since the proximal end or near the proximal end of the push rod 3 is fixedly connected to the movable part 52, and the movable part 52 is located inside the knob 6 and can only move axially relative to the knob 6, rotating the knob 6 can drive the movable part 52 to rotate. The rotating movable part 52 can drive the push rod 3 to rotate. The threaded post 31 of the rotating push rod 3 is screwed out from the first threaded hole that is stationary relative to the sleeve 21. During the process of the threaded post 31 being screwed out, the force of the thread rotation will drive the push rod 3 to move axially towards the proximal end. That is to say, the rotating push rod 3 can drive the movable part 52 to move axially towards the proximal end relative to the knob 6.

[0037] In this embodiment, in the initial state, the axial distance by which the movable member 52 can move proximally or distally relative to the knob 6 is greater than the distance by which the push member 51 can slide axially proximally or distally relative to the handle 4; during the locking process, the axial distance by which the movable member 52 can move proximally relative to the knob 6 is greater than the axial length by which the threaded post 31 is screwed out of the first threaded hole; during the ejection process, the axial distance by which the movable member 52 can move distally relative to the knob 6 is greater than the distance by which the push member 51 can slide distally relative to the handle 4. This arrangement ensures that from the initial state to the sewing process and then to the ejection process, regardless of how the push member 51 moves relative to the handle 4, the movable member 52 is axially slidably disposed within the knob 6.

[0038] Understandably, the first sliding structure and the second sliding structure can be configured in various sliding fit structures. For example, the first sliding structure is a groove and the second sliding structure is a slider that slides with the groove. Alternatively, the first sliding structure can be a slide rod and the second sliding structure can be a sliding hole that slides with the slide rod.

[0039] In some embodiments, such as Figure 1 and Figure 2As shown, the locking structure 100 also includes a lead wire 7, which includes a lead wire handle 71 and a lead wire 72 connected to the lead wire handle 71. The distal end of the lead wire 72 can be inserted into the sheath tube 1 through the wire hole 10, and then pass through the seat hole 231 of the bolt seat 23 and the pin hole 211 of the bolt sleeve 21 from the distal end of the bolt sleeve 21. The lead wire 72 is a ring-shaped structure formed by folding a single thread in half. The lead wire handle 71 is generally flat and plate-shaped. Both sides of the plate surface of the lead wire handle 71 are concave and have multiple elongated protrusions extending along the plate surface to increase friction and facilitate gripping. One end of the lead wire handle 71 has two cantilevered portions 711 spaced apart. The two cantilevered portions 711 are used to clamp the lead wire handle 71 outside the sheath tube 1 and can slide relative to the sheath tube 1 along the axial direction of the sheath tube 1.

[0040] The operation process of the locking structure 100 in this embodiment is as follows:

[0041] Taking the foramen ovale closure surgery as an example, after the foramen ovale closure surgery is completed, the end of the suture 201 is exposed outside the body. First, the exposed part of the suture 201 is captured by the guide wire 72, and the guide wire handle 71 is controlled to slide along the axis of the sheath tube 1 towards the proximal side, so that the guide wire 72 pulls the exposed part of the suture 201 through the pin hole 211 and the seat hole 231 in sequence into the sheath tube 1, and then through the suture hole 10 to exit the sheath tube 1. Then, through the locking suture structure 100, the distal end of the sheath tube 1 is pushed to the closure position under the guidance of the suture 201. Initially, in the initial state, the distal end of the push rod 3 is located on one side of the distal end of the bolt assembly 2, and the threaded post 31 at the distal end of the push rod 3 is threadedly connected to the first threaded hole at the proximal end of the bolt pin 22. Then, during the locking process, the push rod 3 is moved proximal by pushing the pusher 51 until the bolt pin 22 is fully inserted into the bolt sleeve 21, thus locking the suture 201. Next, the knob 6 is rotated, causing the push rod 3 to rotate axially, causing the threaded post 31 to unscrew from the first threaded hole, thereby disengaging the bolt pin 22 from the push rod 3. Finally, during the ejection process, the pusher 51 is pushed distally to move the push rod 3 further distally. Since the threaded post 31 has already been screwed out of the first threaded hole, the distal end of the threaded post 31 will press against the proximal end face of the pin 22 under the pushing action of the push rod 3. The pin 22 and the sleeve 21 are already locked together. The pushing force of the threaded post 31 on the pin 22 from the proximal end to the distal end will not destroy the locking state between the pin 22 and the sleeve 21. As long as the pushing force of the push rod 3 is increased to be greater than the force of the locking fit between the annular protrusion 212 of the sleeve 21 and the groove 234 of the seat 23, the locked sleeve 21 and pin 22 can be pushed out of the seat 23, and the locking of the suture 201 is completed.

[0042] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0043] Example 1

[0044] In this embodiment, the locking structure 100 includes: a sheath 1, a plug assembly 2 located at the distal end of the sheath 1, a top rod 3 movably located inside the sheath 1, a handle 4, and a driving device.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, the handle 4 includes an upper housing 41, a lower housing 42, and a stress-relieving sleeve 43. The upper housing 41 and the lower housing 42 are fitted together, defining a receiving cavity 401 between them. The stress-relieving sleeve 43 includes a connected fixing part 431 and a tubular part 432. The tubular part 432 is an axially extending tubular structure. The fixing part 431 is located at the proximal end of the tubular part 432. A first fixing groove 402 for installing the fixing part 431 is provided at the distal end of the upper housing 41 and the lower housing 42. The fixing part 431 is installed in the first fixing groove 402, and the distal end of the tubular part 432 passes through the upper housing 41 and the lower housing 42 and extends out from the distal end of the upper housing 41 and the lower housing 42. The proximal end of the sheath 1 is inserted into the tubular part 432 of the stress-relieving sleeve 43 and is fixedly connected to the tubular part 432. The proximal end of the sheath 1 communicates with the receiving cavity 401.

[0046] Furthermore, such as Figure 4 As shown, the pusher 51 is provided with a connector 511 that is movably connected to the movable member 52 and located at the distal end of the movable member 52. The movable member 52 can rotate only relative to the connector 511. The connector 511 is provided on the pusher 51, and the pusher 51 transmits force along the axial direction of the push rod 3 to the movable member 52 through the connector 511, thereby realizing the axial movement of the push rod 3 controlled by the pusher 51. Since the movable member 52 is rotatable, it is designed to rotate only relative to the connector 511, avoiding the connector 511 from obstructing the rotation of the movable member 52, while not affecting the connector 511's ability to push the movable member 52 to move axially along the push rod 3.

[0047] In some embodiments, the connector 511 and the movable member 52 can be configured in various ways to engage with each other, for example, Figure 5 and Figure 6 As shown, the inner wall of the distal end of the movable member 52 has an annular groove 524 axially extending around the top rod 3. The outer wall of the proximal end of the connecting member 511 has a protrusion 514 rotatably connected within the annular groove. The protrusion 514 is axially confined within the annular groove 524, and the axial movement of the connecting member 511 can drive the axial movement of the movable member 52. In other embodiments, the annular groove 524 may also be provided on the outer wall of the proximal end of the connecting member 511, and the protrusion 514 may be provided on the inner wall of the distal end of the movable member 52.

[0048] Furthermore, the connector 511 has a columnar structure and a first through hole 512 extending through its proximal and distal ends. The proximal end of the push rod 3 passes through the first through hole 512 and is fixedly connected to the movable part 52. The proximal end of the connector 511 is rotatably connected to the distal end of the movable part 52. This allows the push rod 3 to be movably positioned within the first through hole 512 of the connector 511, serving as a positioning and guiding element for the push rod 3.

[0049] Furthermore, in this embodiment, such as Figure 2 and Figure 5 As shown, the lower housing 42 is provided with a first slide 421 in the accommodating cavity 401. The top of the first slide 421 is provided with a first concave surface 422 that is the same as the outer diameter of the connector 511. The outer wall of the connector 511 can slide against the first concave surface 422. The pusher 51 is connected and disposed on the side of the connector 511 away from the first concave surface 422.

[0050] Furthermore, such as Figure 4 and Figure 5 As shown, the pusher 51 has sliding plates 513 at both ends along the axial direction of the push rod 3. The sliding plates 513 can abut against the inner wall of the upper housing 41. When the pusher 51 is pushed, the sliding plates 513 can slide relative to the inner wall of the upper housing 41. The end face of the pusher 51 away from the connector 511 is provided with several long strip protrusions to increase the friction force when pushing.

[0051] Furthermore, such as Figure 4 and Figure 5 As shown, the movable component 52 has a cylindrical structure and a second through hole 522 penetrating its proximal and distal ends. The push rod 3 passes through the second through hole 522. A locking hole 523 is provided on the side wall of the movable component 52, which communicates with the second through hole 522. A locking pin 8 is provided in the locking hole 523, which can abut against the outer wall of the push rod 3. Since the push rod 3 passes through the second through hole 522 and the locking hole 523 communicates with the second through hole 522, the locking pin 8 is inserted into the locking hole 523 until it abuts against the outer wall of the push rod 3, thereby fixing the push rod 3 to the movable component 52. In some embodiments, the locking pin 8 and the locking hole 523 can be configured with various connection forms. For example, the outer wall of the locking pin 8 and the inner wall of the locking hole 523 are respectively provided with threads, and the locking pin 8 is threadedly connected in the locking hole 523.

[0052] In order to further ensure that the push rod 3 remains coaxial within the second through hole 522, in some embodiments, such as Figure 5 and Figure 7As shown, it also includes a locking nut 9 that can be inserted and fixed in the locking hole 523. The locking nut 9 has a cylindrical structure and a second threaded hole 91 is provided axially inside the locking nut 9. The locking nut 9 has a receiving channel 92 in a direction perpendicular to its own axis. The inner diameter of the receiving channel 92 is equal to the outer diameter of the push rod 3, and the receiving channel 92 is connected to the second threaded hole 91. The locking nut 9 is inserted into the locking hole 523 and fixed. The axis of the locking nut 9 is adjusted so that the axis of the receiving channel 92 coincides with the axis of the second through hole 522. The push rod 3 is inserted into the receiving channel 92, and then the locking pin 8 is threaded into the second threaded hole 91 until it abuts against the outer wall of the push rod 3, so as to achieve a fixed state in which the push rod 3 and the second through hole 522 are kept coaxial and to avoid bending of the push rod 3.

[0053] Furthermore, such as Figure 4 As shown, the first sliding structure consists of several sets of movable grooves 61 recessed on the outer wall of the movable part 52 or the inner wall of the knob 6, with the several sets of movable grooves 61 evenly distributed circumferentially on the outer wall of the movable part 52 or the inner wall of the knob 6; the second sliding structure consists of several sets of movable blocks 521 protruding on the inner wall of the knob 6 or the outer wall of the movable part 52, with the several sets of movable blocks 521 corresponding to the positions of the several sets of movable grooves 61 and distributed circumferentially on the inner wall of the knob 6 or the outer wall of the movable part 52.

[0054] Furthermore, in this embodiment, such as Figure 2 and Figure 5 As shown, the lower housing 42 is provided with a second slide 423 in the accommodating cavity 401. The top of the second slide 423 is provided with a second concave surface 424 that is the same as the outer diameter of the movable member 52. The outer wall of the movable member 52 can slide against the second concave surface 424.

[0055] Example 2

[0056] The following will describe the differences between the embodiments. The similarities or similarities between the embodiments will not be repeated here.

[0057] In this embodiment, as Figure 8 As shown, the outer diameter of the pin 22 is equal to the inner diameter of the pin hole 211 of the sleeve 21. One of the pin 22 and the sleeve 21 is easily deformed, or both are easily deformed. The sleeve 21 has several sets of recesses 214 on the inner wall of the pin hole 211 that can cooperate with the protrusions 223. The protrusions 223 can be engaged in the recesses 214. The distance between adjacent recesses 214 is equal to the distance between adjacent protrusions 223.

[0058] Specifically, since the proximal end face of the protrusion 223 is set as an inclined surface 224, it is convenient to pull the push rod 3 to insert the pin 22 into the pin hole 211 of the sleeve 21. The distal end face of the protrusion 223 is set as a vertical surface 225. Since the recess 214 can cooperate with the protrusion 223 and the protrusion 223 can be engaged in the recess 214, the distal end face of the recess 214 also has a vertical surface 226. When the push rod 3 applies a pushing force to the pin 22 towards the distal end, the vertical surface 226 at the distal end of the recess 214 will block the vertical surface 225 at the distal end of the protrusion 223, preventing the pin 22 from being pushed out of the pin hole 211 of the sleeve 21, ensuring that the pin 22 is always inserted into the pin hole 211 of the sleeve 21 during the process of pushing out the sleeve 21.

[0059] In addition, in this embodiment, the sleeve 21 has a limiting groove 215 at the distal end of the pin hole 211 that can cooperate with the limiting part 222. The limiting part 222 can be engaged in the limiting groove 215, which plays a limiting role and reduces the length of the distal end of the pin 22 protruding from the distal end of the sleeve 21, thereby further improving the degree of locking of the suture.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A locking wire structure, characterized in that, The device includes a sheath (1), a plug assembly (2) disposed within the sheath (1), and a push rod (3) movably disposed within the sheath (1) and detachably connected to the plug assembly (2). The plug assembly (2) has a threading channel (200) extending through its proximal and distal ends for inserting a suture (201). The push rod (3) is movably disposed within the threading channel (200). The push rod (3) has a locking process and a pushing process. During the locking process, the distal end of the push rod (3) can move towards the proximal end relative to the threading channel (200) so that the plug assembly (2) connected to the push rod (3) locks the suture (201) located within the threading channel (200). During the pushing process, the push rod (3) can move distally to push at least a portion of the plug assembly (2) out of the sheath (1).

2. The locking structure according to claim 1, characterized in that: The plug assembly (2) includes a plug sleeve (21) detachably disposed within the sheath (1) and a plug pin (22) installable within the plug sleeve (21). The plug sleeve (21) has a pin hole (211) penetrating its proximal and distal ends. The pin hole (211) is the distal portion of the threading channel (200). The plug pin (22) is detachably disposed on the distal side of the push rod (3). The suture (201) can pass through the pin hole (211). During the locking process, the plug pin (22) can be inserted into the pin hole (211) from the distal end of the plug sleeve (21) to lock the suture (201). During the ejection process, the push rod (3) can eject the plug pin (22) and the plug sleeve (21) from the sheath (1).

3. The locking structure according to claim 2, characterized in that: During the locking process, a gap is provided between the distal end of the plug sleeve (21) and the distal end of the sheath (1), the length of which is at least the axial length of the plug pin (22).

4. The locking structure according to claim 2, characterized in that: It also includes a handle (4) and a first drive mechanism (5) disposed on the handle (4). The first drive mechanism (5) includes a pusher (51) and a movable member (52) disposed on the proximal side of the pusher. The pusher (51) is axially slidably disposed on the handle (4). The movable member (52) is movably disposed in the handle (4). The proximal end of the push rod (3) passes through the distal end of the pusher (51) and exits the proximal side of the pusher (51). The proximal side of the push rod (3) that exits the proximal side of the pusher (51) is connected to the movable member (52). The movable member (52) can move relative to the handle (4) together with the push rod (3).

5. The locking structure according to claim 4, characterized in that: The distal end of the push rod (3) is provided with a threaded post (31), and the proximal end of the bolt (22) is provided with a first threaded hole. The threaded post (31) can be threadedly connected to the first threaded hole, and the movable part (52) can rotate around the axial direction of the push rod (3).

6. The locking structure according to claim 5, characterized in that: It also includes a second drive mechanism for driving the movable part (52) to rotate. The second drive mechanism includes a knob (6) rotatably disposed on the handle (4). The movable part (52) is coaxially disposed in the knob (6). One of the movable part (52) and the knob (6) is provided with a first sliding structure extending along the axial direction of the top rod (3), and the other of the two is provided with a second sliding structure slidably connected to the first sliding structure.

7. The locking structure according to claim 4, characterized in that: The pusher (51) is provided with a connector (511) that is movably connected to the movable member (52) and located on the far side of the movable member (52), and the movable member (52) can rotate only relative to the connector (511).

8. The locking structure according to claim 7, characterized in that: The connector (511) is a columnar structure. The connector (511) has a first through hole (512) that passes through its proximal and distal ends. The proximal end of the top rod (3) passes through the first through hole (512) and is fixedly connected to the movable part (52). The proximal end of the connector (511) and the distal end of the movable part (52) are rotatably connected.

9. The locking structure according to claim 6, characterized in that: The movable part (52) is a cylindrical structure. The movable part (52) has a second through hole (522) that penetrates its proximal and distal ends. The top rod (3) passes through the second through hole (522). A locking hole (523) is provided on the side wall of the movable part (52). The locking hole (523) communicates with the second through hole (522). A locking pin (8) that can abut against the outer wall of the top rod (3) is provided in the locking hole (523).

10. The locking structure according to claim 2, characterized in that: The pin (22) includes a main body (221) and several sets of protrusions (223) arranged around the outer periphery of the main body (221). The proximal end face of the protrusion (223) is set as an inclined surface (224), and the distal end face of the protrusion (223) is set as a vertical surface (225). The sleeve (21) has several sets of recesses (214) that can cooperate with the protrusions (223) on the inner wall of the pin hole (211). The protrusions (223) can be engaged in the recesses (214).

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