A thread-cutting-free locking device and valve ring repair system

Abstract

The present invention discloses a thread-free locking device and annulus repair system, which relates to the field of medical device technology. The scheme includes: a rotating structure, which is provided with a first through hole passing through radially; a threading piece, whose width is less than the diameter of the first through hole and whose length is greater than the diameter of the first through hole, and one end of the first locking line is fixedly connected to the threading piece; a second through hole is provided on the threading piece, the second through hole is provided near one end of the threading piece, the second through hole is used for the second locking line to pass through, and the two ends of the second locking line are movable ends, and the second locking line is used to make the threading piece pass through the first through hole; when the other end of the first locking line is fixed and the rotating structure rotates, the first locking line is pulled so that the threading piece is parallel to and abuts against the side wall of the rotating structure. In this way, the threading piece and the rotating structure are limited so that the first locking line can be tightened. After tightening, the second locking line is withdrawn from the body to achieve the thread-free effect, and the valve ring is uniformly contracted by synchronously pulling the two ends of the first locking line.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a thread-cutting-free locking device and a valve ring repair system. Background Art

[0002] Currently, there are two main treatments for mitral regurgitation: medication and surgery. Surgical treatment is divided into edge-to-edge repair, annulus repair, and chordae tendineae repair. For annulus repair, the doctor nails multiple sets of nailing devices into the annulus, and tightens the nailing devices through a locking wire device to shrink the annulus tissue and achieve annulus repair. However, when the existing locking wire device uses a locking wire to connect multiple nailing devices in series, the excess locking wire needs to be cut and fastened to fix the locking wire. However, the visual field in the body is poor, and the operation depends entirely on the doctor's experience, and the operation time is slow. Summary of the Invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, the present invention provides a thread-free locking device and a valve ring repair system.

[0004] To achieve the above-mentioned purpose, the present invention provides a thread-locking device that does not require thread cutting, comprising:

[0005] The rotating structure is provided with a first through hole which penetrates radially;

[0006] a threading piece, the width of which is smaller than the diameter of the first through hole and the length of which is larger than the diameter of the first through hole, and one end of the first locking wire is fixedly connected to the threading piece;

[0007] A second through hole is provided on the threading plate, and the second through hole is provided near one end of the threading plate. The second through hole is used for passing a second locking wire, and both ends of the second locking wire are movable ends. The second locking wire is used to make the threading plate pass through the first through hole;

[0008] When the other end of the first locking wire is fixed and the rotating structure rotates, the first locking wire is pulled so that the threading piece is parallel to and abuts against the side wall of the rotating structure, and the threading piece is used to tighten the first locking wire.

[0009] Preferably, the thread-cutting-free thread locking device of the present invention further includes a first limiting structure, a second limiting structure and a first supporting structure;

[0010] The first supporting structure is provided on the nailing device, and the rotating structure axially penetrates the first supporting structure;

[0011] The first limiting structure radially penetrates the rotating structure, and both ends of the first limiting structure extend out of the side wall of the rotating structure;

[0012] The second limiting structure is arranged on the axial side wall of the first supporting structure. 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 supporting structure. 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 circumferential rotation of the rotating structure.

[0013] Preferably, the first limiting structure includes a first limiting portion and a second limiting portion, the first limiting portion is connected to one end of the second limiting portion at an angle, and the distance between the first limiting portion and the second limiting portion at one end away from each other is greater than the diameter of the rotating structure;

[0014] When the rotating structure moves axially toward the first supporting structure, the first limiting portion and the second limiting portion are squeezed to shrink into the rotating structure; when the first limiting structure moves out of the first supporting structure, the first limiting portion and the second limiting portion are reset and abut against the axial side wall of the first supporting structure to limit the reverse axial movement of the rotating structure.

[0015] Preferably, the second limiting structure protrudes from the setting surface, and a plurality of the second limiting structures are provided and are circumferentially spaced along the side wall of the first supporting structure. When the first limiting structure extends out of the first supporting structure, the first limiting portion and the second limiting portion extend and are located between the two second limiting structures.

[0016] The axial side wall of the first supporting 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.

[0017] Preferably, a 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 used for inserting the first limiting structure, and the second slot is used for inserting the first pin;

[0018] 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.

[0019] Preferably, a plurality of the second limiting structures are provided and are evenly arranged along the axial side wall of the first supporting structure in the circumferential direction;

[0020] The second limiting structure includes a first side wall and a second side wall, the first side wall and the axial side wall of the first supporting structure are perpendicular to each other, the second side wall is connected to the axial side wall of the first supporting structure at an angle, and along the positive rotation direction of the rotating structure, the second side wall is located upstream of the first side wall;

[0021] When the first limiting structure is located between two second limiting structures, the first side wall is used to limit the reverse rotation of the rotating structure, and the second side wall is used to guide the rotating structure to rotate forward.

[0022] 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 wire locking spring tube is inserted between two of the third limiting structures, the rotating structure and the wire locking spring tube are circumferentially limited.

[0023] Preferably, an arcuate transition portion is provided between the surface of the third limiting structure facing the wire lock spring tube and the two side surfaces, and the arcuate transition portion is used to guide the end of the wire lock spring tube to be inserted between the two third limiting structures.

[0024] To achieve the above-mentioned object, a valve ring repair system of the present invention includes a thread-cutting-free locking device as described above, and further includes a nailing device, a first locking wire, a second locking wire, and a thread-locking spring tube;

[0025] The nailing devices are provided in plurality and nailed into the valve annulus tissue in sequence, the locking wire devices are installed on the nailing devices at the two ends of the plurality of nailing devices, and the first locking wire is connected in series with the plurality of nailing devices in sequence;

[0026] The two ends of the first locking wire are fixed to the threading pieces in the two thread locking devices, the second locking wire passes through one end of the threading piece, and the thread locking spring tube is connected to the rotating structure in a circumferential limiting manner;

[0027] The valve ring repair system is used to control the threading piece to pass through the rotating structure through the second locking wire, and to simultaneously tighten the two ends of the first locking wire by synchronously controlling the rotation of the two locking wire spring tubes to bring the multiple nailing devices closer to each other.

[0028] Based on this, the beneficial effects of the present invention are:

[0029] Through the solution of the present invention, a threading piece is set up to fix the end of the first locking line used for connecting multiple nailing devices in series with the threading piece, and a second locking line is set to pass through one end of the threading piece. Both ends of the second locking line are located outside the body and can be controlled by the doctor. The first locking line and the threading piece are located inside the body, so that when the locking operation is performed, the second locking line is controlled to make the threading piece pass through the rotating structure along the first through hole, and the rotating structure is controlled to rotate to tighten the first locking line. At this time, the threading piece is erected and fits the rotating structure through the pulling of the first locking line and the second locking line, thereby fixing the end of the first locking line. At this time, by pulling one end of the second locking line, the second locking line is allowed to leave the threading piece as a whole to complete the withdrawal. In this way, the first locking line and the rotating structure can be fixed without performing thread cutting and buckling operations in the body, thereby achieving a thread-free effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0031] Figure 1 A schematic diagram schematically illustrates the structure of a thread locking device according to an embodiment of the present invention;

[0032] Figure 2 A schematic diagram schematically illustrates the structure of a threading sheet according to an embodiment of the present invention;

[0033] Figure 3 A schematic diagram schematically illustrates a rotating structure according to an embodiment of the present invention;

[0034] Figure 4 A schematic structural diagram schematically showing a first limiting structure according to an embodiment of the present invention;

[0035] Figure 5 A schematic structural diagram schematically showing a first supporting structure according to an embodiment of the present invention;

[0036] Figure 6 A schematic diagram schematically illustrates the structure of a valve ring repair system according to an embodiment of the present invention;

[0037] Explanation of the accompanying drawings: 10-rotating structure, 101-first through hole, 102-first slot, 103-second slot, 104-first pin, 105-third limiting structure, 1051-arc-shaped transition portion, 20-threading plate, 201-second through hole, 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-first supporting structure, 60-first locking line, 70-second locking line, 80-nailing device, 90-wire lock spring tube. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "the" and "the" used in the embodiments of the present application are also intended to include plural forms unless the context clearly indicates otherwise.

[0040] It should be understood that although the terms first, second, third, etc. may be used to describe related structures in the embodiments of the present application, these related structures should not be limited to these terms. These terms are only used to distinguish related structures from each other.

[0041] Depending on the context, the word "if" as used herein may be interpreted as "when" or "when..." Similarly, depending on the context, the phrase "if it is determined" may be interpreted as "when it is determined" or "when (stated condition or event) is detected."

[0042] It should be noted that the directional terms such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the perspectives shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is formed "on" or "under" another element, it can not only be formed directly "on" or "under" another element, but can also be formed indirectly "on" or "under" another element through an intermediate element.

[0043] Figure 1 A schematic diagram schematically shows the structure of a thread locking device according to an embodiment of the present invention. Figure 2 A schematic diagram schematically shows the structure of a threading sheet according to an embodiment of the present invention. Figure 3 A schematic diagram schematically shows a rotating structure according to an embodiment of the present invention, as shown in FIG. Figure 1-3 As shown, a thread-cutting-free thread locking device of the present invention comprises:

[0044] The rotating structure 10 is provided with a first through hole 101 which penetrates radially;

[0045] A threading piece 20 , whose width is smaller than the diameter of the first through hole 101 and whose length is larger than the diameter of the first through hole 101 , is fixedly connected to one end of the first locking wire 60 on the threading piece 20 ;

[0046] A second through hole 201 is provided on the threading piece 20. The second through hole 201 is provided near one end of the threading piece 20. The second through hole 201 is used for the second locking wire 70 to pass through. Both ends of the second locking wire 70 are movable ends. The second locking wire 70 is used to allow the threading piece 20 to pass through the first through hole 101.

[0047] When the other end of the first locking wire 60 is fixed and the rotating structure 10 rotates, the first locking wire 60 is pulled so that the threading piece 20 is parallel to and abuts against the side wall of the rotating structure 10. The threading piece 20 is used to tighten the first locking wire 60.

[0048] Specifically, the end of the rotating structure 10 is connected to the circumferential limit of the locking wire spring tube 90. The doctor controls the rotation of the rotating structure 10 by controlling the rotation of the locking wire spring tube 90, thereby winding the first locking wire 60 around the rotating structure 10 and tightening the first locking wire 60.

[0049] In conventional technology, in order to prevent the first locking wire 60 from being directly separated from the rotating structure 10 when being tightened, it is necessary to cut off the excess first locking wire 60 at the end and fasten the end of the first locking wire 60 to the rotating structure 10, thereby achieving the goal of tightening the first locking wire 60 and bringing the multiple stapling devices 80 close to the contracted annular tissue.

[0050] In this method, both thread cutting and button tying need to be performed inside the body, and the poor visual field inside the body requires the doctor to rely on experience to operate. The operation is cumbersome and wastes surgical time. In addition, improper cutting can easily lead to a large amount of thread ends remaining, which can easily be entangled on the rotating structure 10 when it rotates, causing jamming and affecting surgical treatment.

[0051] The present application sets a threading piece 20, fixes the end of the first locking line 60 to it in advance, and controls the threading piece 20 to move through the first through hole 101 through the second locking line 70. At the same time, since the second locking line 70 is connected to one end of the threading piece 20, when the second locking line 70 is pulled, the threading piece 20 can stand up. Since the length of the threading piece 20 is greater than the diameter of the first through hole 101, when the first locking line 60 is pulled and then drags the threading piece 20 to move, it will abut against the first through hole 101 and achieve limiting, thereby achieving the tightening effect of the first locking line 60. After tightening, by pulling one of the two ends of the second locking line 70 outside the body, the second locking line 70 moves along the second through hole 201 until the other is detached from the second through hole 201 and withdrawn from the body as a whole, completing the "thread cutting".

[0052] With this arrangement, the "thread cutting" operation can be achieved by simply pulling one end of the second locking line 70, without the doctor having to manually cut and fasten the thread inside the body. This reduces tedious operations to ease the burden on the doctor, shortens the operation time, and improves the efficiency of the operation.

[0053] Furthermore, Figure 4 A schematic structural diagram schematically showing a first limiting structure according to an embodiment of the present invention is shown. Figure 5 A schematic structural diagram of a first supporting structure according to an embodiment of the present invention is shown as follows: Figure 1-5 As shown: A thread-cutting-free thread locking device of the present invention further includes a first limiting structure 30, a second limiting structure 40 and a first supporting structure 50;

[0054] The first support structure 50 is disposed on the nailing device 80 , the rotating structure 10 axially penetrates the first support structure 50 , the first limiting structure 30 radially penetrates the rotating structure 10 , and both ends of the first limiting structure 30 extend out of the sidewall of the rotating structure 10 ;

[0055] The second limiting structure 40 is arranged on the axial side wall of the first supporting structure 50. When the rotating structure 10 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 supporting structure 50. 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 circumferential rotation of the rotating structure 10.

[0056] Specifically, the first limiting structure 30 includes a first limiting portion 301 and a second limiting portion 302. The first limiting portion 301 is connected to one end of the second limiting portion 302 at an angle. The distance between the first limiting portion 301 and the second limiting portion 302, which are away from each other, is greater than the diameter of the rotating structure 10.

[0057] When the rotating structure 10 moves axially toward the first supporting structure 50, the first limiting portion 301 and the second limiting portion 302 are squeezed to shrink into the rotating structure 10. When the first limiting structure 30 moves out of the first supporting structure 50, the first limiting portion 301 and the second limiting portion 302 are reset and abut against the axial side wall of the first supporting structure 50 to limit the reverse axial movement of the rotating structure 10.

[0058] Furthermore, a plurality of second limiting structures 40 are provided and are evenly arranged circumferentially along the axial sidewall of the first supporting structure 50. The second limiting structure 40 includes a first sidewall 401 and a second sidewall 402. The first sidewall 401 and the axial sidewall of the first supporting structure 50 are perpendicularly arranged to each other, and the second sidewall 402 is connected to the axial sidewall of the first supporting structure 50 at an angle. In the positive rotation direction of the rotating structure 10, the second sidewall 402 is located upstream of the first sidewall 401.

[0059] When the first limiting structure 30 is located between the two second limiting structures 40 , the first side wall 401 is used to limit the reverse rotation of the rotating structure 10 , and the second side wall 402 is used to guide the rotating structure 10 to rotate forward.

[0060] In this arrangement, in the conventional technology, the locking wire device is arranged at the center of the two nailing devices 80. When the locking wire device tightens the first locking wire 60, the first locking wire 60 is pulled to both ends at the same time. In this manner, the locking wire device may be skewed, causing the two nailing devices 80 and the locking wire device to be not colinear after locking, resulting in incomplete locking, which may cause a portion of the valve ring to expand, affecting the valve ring contraction effect. The present invention arranges the first supporting structure 50 on the nailing device 80, so that the rotating structure 10 is installed at the nailing device 80. When the rotating structure 10 rotates, the first locking wire 60 can be pulled from one of the two nailing devices 80 to the other, so that the first locking wire 60 can become a straight line, thereby ensuring the stability of the valve ring contraction effect.

[0061] At the same time, the first limiting portion 301 and the second limiting portion 302 are connected at an angle at one end and are far away from each other at the other ends, so that the first limiting portion 301 and the second limiting portion 302 are elastic. When the rotating structure 10 moves axially in the direction close to the first supporting structure 50, the first limiting portion 301 and the second limiting portion 302 are gradually compressed and then retracted into the rotating structure 10, so that it can smoothly pass through the first supporting structure 50. After the first limiting structure 30 passes through, the first limiting portion 301 and the second limiting portion 302 are ejected from the side wall of the rotating structure 10 by the elastic force, and then abut against the axial side wall of the first supporting structure 50, preventing the rotating structure 10 from moving axially in the opposite direction.

[0062] After the first limiting structure 30 passes through, the first limiting portion 301 and the second limiting portion 302 are respectively located in the two second limiting structures 40, and the first side wall 401 abuts against the first limiting portion 301 and the second limiting portion 302, thereby limiting the reverse circumferential rotation of the rotating structure 10, thereby achieving the effect of continuously tightening the first locking line 60. If the first locking line 60 is not fully tightened, the inclined surface of the second side wall 402 can be set to make the rotating structure 10 further rotate in the positive circumferential direction, further tighten the first locking line 60, and provide adjustable space.

[0063] Furthermore, if Figure 3 As shown, a first slot 102 and a second slot 103 are provided on the rotating structure 10. The first slot 102 and the second slot 103 are arranged perpendicular to each other. The first slot 102 is used to insert the first limiting structure 30, and the second slot 103 is used to insert the first pin 104.

[0064] When the first pin 104 is inserted into the second slot 103 , the first pin 104 is clamped between the first limiting portion 301 and the second limiting portion 302 . The first pin 104 is used to prevent the first limiting structure 30 from moving out of the first slot 102 .

[0065] Specifically, an arc groove 303 is provided between the first limiting portion 301 and the second limiting portion 302. When the first limiting structure 30 is inserted into the first slot 102, the first pin 104 is inserted into the second slot 103, and the first pin 104 is inserted into the arc groove 303, so that the first limiting structure 30 can be limited in multiple directions, thereby realizing the fixation of the first limiting structure 30.

[0066] Furthermore, a protruding third limiting structure 105 is provided on the rotating structure 10 , and the third limiting structure 105 is provided on a side of the first limiting structure 30 close to the first supporting structure 50 ;

[0067] The third limiting structure 105 is used to be connected to the wire locking spring tube 90 in a circumferential limiting manner, so that the wire locking spring tube 90 controls the rotation of the rotating structure 10 .

[0068] Specifically, multiple third limiting structures 105 are provided and are evenly spaced along the circumferential side wall of the rotating structure 10. When the wire locking spring tube 90 is inserted between two third limiting structures 105, the rotating structure 10 and the wire locking spring tube 90 are connected in a circumferential limiting manner, and the rotating structure 10 can be controlled by the wire locking spring tube 90 to achieve the winding and tightening of the first locking wire 60.

[0069] At the same time, an arc-shaped transition portion 1051 is provided between the surface of the third limiting structure 105 facing the wire locking spring tube 90 and the two side surfaces. The arc-shaped transition portion 1051 can be set as a circular arc surface or a slope. When the wire locking spring tube 90 abuts against the third limiting structure 105, due to poor vision in the body, the end of the wire locking spring tube 90 cannot be well inserted between the two third limiting structures 105. At this time, the distance between the two third limiting structures 105 is increased by setting the arc-shaped transition portion 1051, thereby assisting the quick alignment and insertion of the end of the wire locking spring tube 90, thereby completing the circumferential limiting connection between the wire locking spring tube 90 and the rotating structure 10.

[0070] Similarly, a protruding plug-in block (not shown in the figure) is provided at the end of the wire lock spring tube 90, and the same auxiliary insertion structure (not shown in the figure) is provided between the surface of the plug-in block facing the third limiting structure 105 and the two side surfaces, thereby facilitating quick alignment of the two.

[0071] Furthermore, Figure 6 A schematic diagram schematically shows the structure of a valve ring repair system according to an embodiment of the present invention, as shown in FIG. Figure 6As shown, the present invention also provides a valve ring repair system, which includes the above-mentioned thread-free locking device, and also includes a nailing device 80, a first locking wire 60, a second locking wire 70 and a thread locker spring tube 90;

[0072] Multiple nailing devices 80 are provided and nailed into the valve ring tissue in sequence. The locking wire device is installed on the nailing devices 80 located at the two ends of the multiple nailing devices 80. The first locking wire 60 connects multiple nailing devices 80 in series in sequence, and the two ends of the first locking wire 60 are fixed on the threading pieces 20 in the two locking wire devices. The second locking wire 70 passes through one end of the threading piece 20, and the locking wire spring tube 90 is connected to the rotating structure 10 in a circumferential limit direction.

[0073] When performing an annulus repair surgery, the nailing devices 80 are controlled to be nailed into the annular tissue in sequence to complete the fixation, and the locking wire devices are installed on the nailing devices 80 at the two ends of the entire nailing device 80. The first locking wire 60 passes through the multiple nailing devices 80 in sequence, one end of which is fixed to the rotating structure 10 of one of the locking wire devices, and the other end is fixed to the threading piece 20. The doctor pulls the two ends of the second locking wire 70 at the same time, thereby controlling the threading piece 20 to pass through the rotating structure 10. When the rotating structure 10 is rotated to tighten the first locking wire 60, the threading piece 20 is erected and parallel to the rotating structure 10 and abuts against its side wall through the adjustment of the second locking wire 70, thereby achieving the fixation of the end of the first locking wire 60;

[0074] When the two rotating structures 10 rotate synchronously, the first locking line 60 is straightened and the multiple nailing devices 80 are controlled to move closer to each other, thereby achieving contraction of the valve ring. At this time, the rotating structure 10 is controlled to move axially to achieve locking, and one end of the second locking line 70 is pulled outside the body, so that the other end moves out of the threading piece 20 and is withdrawn from the body as a whole, achieving "thread cutting" and completing the valve ring repair surgery.

[0075] To sum up, the present invention sets the threading piece 20, one end of the first locking line 60 is fixed to it, and one end of the threading piece 20 passes through the second locking line 70. When the first locking line 60 is tightened, the threading piece 20 can fix its end, and the second locking line 70 can be withdrawn by pulling one end of the second locking line 70, realizing a "thread-free" operation, avoiding the complicated and tedious operation of the doctor manually cutting the thread and fastening one end of the first locking line 60 during the operation, reducing the burden on the doctor and improving the efficiency of the operation.

[0076] The above description is merely a preferred embodiment of the present application. Those skilled in the art should understand that the scope of the disclosure herein is not limited to technical solutions formed by a specific combination of the aforementioned technical features. It also encompasses other technical solutions formed by any combination of the aforementioned technical features or their equivalents, without departing from the aforementioned disclosed concepts. For example, a technical solution formed by replacing the aforementioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A thread locking device without thread cutting, characterized in that: include: The rotating structure is provided with a first through hole which penetrates radially; a threading piece, the width of which is smaller than the diameter of the first through hole and the length of which is larger than the diameter of the first through hole, and one end of the first locking wire is fixedly connected to the threading piece; A second through hole is provided on the threading plate, and the second through hole is provided near one end of the threading plate. The second through hole is used for passing a second locking wire, and both ends of the second locking wire are movable ends. The second locking wire is used to make the threading plate pass through the first through hole; When the other end of the first locking wire is fixed and the rotating structure rotates, the first locking wire is pulled so that the threading piece is parallel to and abuts against the side wall of the rotating structure, and the threading piece is used to tighten the first locking wire; The thread locking device further includes a first limiting structure, a second limiting structure and a first supporting structure; The first supporting structure is provided on the nailing device, and the rotating structure axially penetrates the first supporting structure; The first limiting structure radially penetrates the rotating structure, and both ends of the first limiting structure extend out of the side wall of the rotating structure; The second limiting structure is provided on an axial side wall of the first supporting structure. When the rotating structure is in an initial state, the first limiting structure and the second limiting structure are respectively located on both sides of the first supporting structure. 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 circumferential rotation of the rotating structure. A protruding third limiting structure is provided on the rotating structure, and the third limiting structure is provided on a side of the first limiting structure close to the first supporting structure; The third limiting structure is used to be connected to the wire locking spring tube in a circumferential limiting manner so that the wire locking spring tube controls the rotation of the rotating structure.

2. The thread-locking device according to claim 1, characterized in that: The first limiting structure includes a first limiting portion and a second limiting portion, wherein the first limiting portion is connected to one end of the second limiting portion at an angle, and a distance between one end of the first limiting portion and the second limiting portion that is away from each other is greater than the diameter of the rotating structure; When the rotating structure moves axially toward the first supporting structure, the first limiting portion and the second limiting portion are squeezed to shrink into the rotating structure; when the first limiting structure moves out of the first supporting structure, the first limiting portion and the second limiting portion are reset and abut against the axial side wall of the first supporting structure to limit the reverse axial movement of the rotating structure.

3. The thread-locking device 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 are circumferentially spaced along the side wall of the first supporting structure. When the first limiting structure extends out of the first supporting structure, the first limiting portion and the second limiting portion extend and are located between the two second limiting structures; The axial side wall of the first supporting 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 thread-locking device according to claim 2, characterized in that: A 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 used for inserting the first limiting structure, and the second slot is used for inserting 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, and the first pin is used to prevent the first limiting structure from moving out of the first slot.

5. The thread-locking device according to claim 3, characterized in that: The second limiting structures are provided in plurality and are evenly arranged along the axial side wall of the first supporting structure in the circumferential direction; The second limiting structure includes a first side wall and a second side wall, the first side wall and the axial side wall of the first supporting structure are perpendicular to each other, the second side wall is connected to the axial side wall of the first supporting structure at an angle, and along the positive rotation direction of the rotating structure, the second side wall is located upstream of the first side wall; When the first limiting structure is located between two second limiting structures, the first side wall is used to limit the reverse rotation of the rotating structure, and the second side wall is used to guide the rotating structure to rotate forward.

6. The thread-locking device according to claim 1, characterized in that: The third limiting structures are provided in plurality and are evenly spaced along the circumferential side wall of the rotating structure. When the end of the wire locking spring tube is inserted between two of the third limiting structures, the rotating structure and the wire locking spring tube are circumferentially limited.

7. The thread-locking device according to claim 6, characterized in that: An arcuate transition portion is provided between the surface of the third limiting structure facing the wire lock spring tube and the two side surfaces, and the arcuate transition portion is used to guide the end of the wire lock spring tube to be inserted between the two third limiting structures.

8. A valve ring repair system, characterized in that: A thread-locking device comprising a thread-free thread-locking device as claimed in any one of claims 1 to 7, further comprising a nailing device, a first locking wire, a second locking wire and a thread-locking spring tube; The nailing devices are provided in plurality and nailed into the valve annulus tissue in sequence, the locking wire devices are installed on the nailing devices at the two ends of the plurality of nailing devices, and the first locking wire is connected in series with the plurality of nailing devices in sequence; One end of the first locking wire is fixed to the threading piece, the second locking wire passes through one end of the threading piece, and the wire lock spring tube is circumferentially limitedly connected to the rotating structure; The valve ring repair system is used to control the threading piece to pass through the rotating structure through the second locking wire, and to simultaneously tighten the two ends of the first locking wire by synchronously controlling the rotation of the two locking wire spring tubes to bring the multiple nailing devices closer to each other.

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