Suture locking device

Abstract

The present invention provides a suture locking device, including an implant component and a release component, the implant component includes an expandable and contractible elastic member, the expandable and contractible elastic member is formed with an expandable and contractible threading channel that penetrates along its axial direction and can expand and contract along its radial direction; the release component is formed with a threading cavity that penetrates along its axial direction, the release component at least partially extends into the expandable and contractible threading channel to be detachable from the implant component, the suture is threaded in the threading cavity and the expandable and contractible threading channel, the implant component and the release component are configured such that when the release component extends into the expandable and contractible threading channel, the expandable and contractible threading channel expands to be suitable for the suture to penetrate and move, and when the release component is detached from the expandable and contractible threading channel, the expandable and contractible threading channel contracts to lock the suture. The suture locking device of the present invention occupies a small operating channel when locking the suture, and has high locking reliability, which can effectively reduce surgical risks.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a suture thread locking device. Background Art

[0002] Minimally invasive and interventional surgeries are becoming increasingly common, and sutures often need to be knotted or locked during surgery. In such surgeries, knotting or locking sutures in the patient's body is usually done through small, flexible, remote channels.

[0003] The prior art discloses a suture locking device, which uses a rigid clamp to clamp a locking nail, thereby achieving the purpose of locking the suture. However, when this locking device needs to be applied to a smaller operating channel, due to the limitation of the size of the parts, the clamping force provided is insufficient to clamp the suture, or because the external operating space required by the locking device is too large, it is difficult to lock in a tiny channel, the locking is unreliable, and the surgical risk is increased. Summary of the invention

[0004] In view of the above problems, the present invention provides a suture locking device to overcome the above problems or at least partially solve the above problems.

[0005] An embodiment of the present invention provides a suture locking device, comprising: an implant component, the implant component comprising an expandable and contractible elastic member, a contractible threading channel extending through the axial direction and expandable and contractible in the radial direction formed therein; a release component, the release component forming a threading cavity extending through the axial direction thereof, the release component at least partially extending into the contractible threading channel so as to be detachable from the implant component, a suture being threaded through the threading cavity and the contractible threading channel, the implant component and the release component being constructed such that when the release component extends into the contractible threading channel, the contractible threading channel expands to accommodate the threading movement of the suture, and when the release component detaches from the contractible threading channel, the contractible threading channel contracts to lock the suture.

[0006] It can be seen from the above technical scheme that in the suture locking device of the embodiment of the present invention, when the release component extends into the expandable and contractible elastic member, the release component can open the expandable and contractible threading channel, thereby increasing the cross-sectional area of ​​the expandable and contractible threading channel, that is, the accommodating space for the suture becomes larger, and the suture can move freely in the expandable and contractible threading channel. At this time, the operator can tighten the suture passing through the expandable and contractible threading channel and the threading cavity to an ideal length. When the release component is separated from the expandable and contractible elastic member, the expandable and contractible elastic member loses the support of the release component. Under the action of elasticity, the expandable and contractible elastic member will shrink inward, and the accommodating space for the suture will also shrink, thereby achieving the purpose of locking the suture in the expandable and contractible threading channel. Compared with the prior art, the suture locking device of the present invention has requirements for the size of the operating channel, which is more suitable for a smaller and more flexible operating channel, and the locking of the suture can be achieved only by separating the release component from the implant component, which can effectively reduce the difficulty of locking the suture and reduce the risk of surgery.

[0007] In addition, a suture locking device according to the present invention may also have the following additional technical features:

[0008] According to some embodiments of the present invention, the expandable and contractible elastic member includes a fixed portion and an expandable and contractible portion fixedly connected to the fixed portion, the expandable and contractible portion includes a plurality of expandable and contractible elastic sheets extending axially along the fixed portion and spaced apart circumferentially along the fixed portion, an expandable and contractible portion of the expandable and contractible threading channel is defined between the plurality of expandable and contractible elastic sheets, and the expandable and contractible threading channel extends through the fixed portion.

[0009] According to some embodiments of the present invention, the implant assembly further includes an implant shell, and the implant shell is sleeved on the outer sides of the plurality of expandable and contractible elastic sheets.

[0010] According to some embodiments of the present invention, the implant component also includes: an implant top piece, the implant top piece is formed with a connecting port connected to the expansion and contraction threading channel, the implant top piece is connected to the fixed part of the expansion and contraction elastic piece; a telescopic elastic piece, the telescopic elastic piece is sleeved on the outer side of the implant shell and is telescopic along the axial direction of the implant shell, the implant shell is provided with a blocking part, when the release component extends into the expansion and contraction threading channel, the telescopic elastic piece is compressed between the blocking part and the implant top piece; when the release component is disengaged from the expansion and contraction elastic piece, the telescopic elastic piece is released to push the implant shell to move and squeeze the expansion and contraction elastic piece, so that the expansion and contraction threading channel shrinks.

[0011] According to some embodiments of the present invention, the implant shell has a first channel and a second channel, the second channel is connected to the first channel and is suitable for the expansion and contraction elastic member to pass through, the first channel and the second channel are coaxially arranged and their cross-sectional areas are smaller than the cross-sectional area of ​​the second channel, the second channel is formed at one end of the implant shell adjacent to the release component, and a limiting portion is formed at the connection between the first channel and the second channel, and the implant shell moves to squeeze the expansion and contraction elastic member through the limiting portion to shrink the expansion and contraction threading channel.

[0012] According to some embodiments of the present invention, a limit block is provided on one of the implant shell and the expandable elastic member, and a limit groove suitable for cooperating with the limit block is provided on the other of the implant shell and the expandable elastic member, and the limit groove cooperates with the limit block to limit the relative movement of the implant shell and the expandable elastic member.

[0013] According to some embodiments of the present invention, the release assembly includes a release shell and a release inner core, the release shell is connected to the implant shell, the release inner core is inserted into the release shell and is suitable for extending into the expansion and contraction threading channel and connecting to the expansion and contraction elastic member.

[0014] According to some embodiments of the present invention, a limiting column is provided on one of the release shell and the implantation shell, and a limiting hole suitable for cooperating with the limiting column is provided on the other of the release shell and the implantation shell.

[0015] According to some embodiments of the present invention, a first step is formed in the release shell, and the release core is provided with a second step. When the release core is inserted into the release shell, the second step stops at the first step to be connected to the expansion and contraction elastic member.

[0016] According to some embodiments of the present invention, saw teeth are formed in the expandable elastic member to lock the suture thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is an exploded view of a suture locking device according to an embodiment of the present invention;

[0019] Figure 2 is a cross-sectional view of an assembled implantation component and a release component of a suture locking device according to an embodiment of the present invention;

[0020] Figure 3 is a cross-sectional view of an implantation component and a release component of a suture locking device according to an embodiment of the present invention after release;

[0021] Figure 4 is a cross-sectional view of a suture locking device according to an embodiment of the present invention when locking a suture;

[0022] Figure 5 is a schematic structural diagram of an angle when a suture thread locking device according to an embodiment of the present invention locks a suture thread;

[0023] Figure 6 is a schematic structural diagram of an expandable and contractible elastic member of a suture thread locking device according to an embodiment of the present invention;

[0024] Figure 7 is a schematic structural diagram of an implant top member of a suture thread locking device according to an embodiment of the present invention;

[0025] Figure 8 is a schematic structural diagram of an implantable housing of a suture locking device according to an embodiment of the present invention;

[0026] Fig. 9 is a cross-sectional view of an implant housing of a suture locking device according to an embodiment of the present invention;

[0027] Fig.10 is a schematic structural diagram of a release housing of a suture thread locking device according to an embodiment of the present invention;

[0028] Fig.11 is a schematic structural diagram of a release inner core of a suture thread locking device according to an embodiment of the present invention;

[0029] Fig.12 4 is a cross-sectional view of a release assembly of a suture locking device and a suture according to an embodiment of the present invention.

[0030] Component number

[0031] 100: Suture locking device;

[0032] 1: implant assembly; 11: implant top piece; 12: telescopic elastic piece, 13: implant shell, 131: first channel, 132: second channel, 133: limiting groove, 134: limiting hole, 135: blocking part, 136: step at the connection between the first channel and the second channel;

[0033] 14: expansion and contraction elastic member, 141: fixed external thread, 142: limit block, 143: sawtooth, 144: expansion and contraction internal thread, 145: expansion and contraction threading channel, 146: fixed part, 147: expansion and contraction part, 1471: expansion and contraction elastic sheet;

[0034] 2: release assembly; 21: release housing, 211: limit column; 212: first step; 22: release inner core, 221: release external thread, 222: second step, 223: threading cavity;

[0035] 3: Suture line. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in the field based on the embodiments in the embodiments of the present invention should fall within the scope of protection of the embodiments of the present invention.

[0037] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "multiple" and "several" mean at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The following describes a suture locking device 100 according to an embodiment of the present invention with reference to the accompanying drawings. The suture locking device 100 can provide sufficient locking force to effectively lock the suture 3 when the operating channel is small, and can also complete reliable locking of the suture 3 in a small, flexible remote channel, thereby reducing surgical risks.

[0041] like Figure 1-3 As shown, the suture locking device 100 according to an embodiment of the present invention may include an implant component 1 and a release component 2. The implant component 1 may include an expandable and contractible elastic member 14. A contractible threading channel 145 is formed in the expandable and contractible elastic member 14, which penetrates the expandable and contractible threading channel 14 in the axial direction and is expandable and contractible in the radial direction. The suture 3 can pass through the expandable and contractible threading channel 145 in the axial direction and can be accommodated and locked in the expandable and contractible threading channel 145. The expandable and contractible threading channel 145 can expand and contract in the radial direction, that is, the size of the expandable and contractible threading channel 145 is variable. For example, when the expandable and contractible threading channel 145 expands and increases, the suture 3 can move freely in the expandable and contractible threading channel 145. When the suture 3 needs to be locked, the suture 3 located in the expandable and contractible elastic member 14 can be locked by contracting the expandable and contractible threading channel 145.

[0042] The release component 2 is formed with a threading cavity 223 that runs through the axial direction thereof. The threading cavity 223 is suitable for the suture 3 to pass through and is connected to the expansion and contraction threading channel 145. The release component 2 at least partially extends into the expansion and contraction threading channel 145 to be detachable from the implant component. The expansion and contraction of the expansion and contraction elastic member 13 can be achieved by unlocking the component 2. The suture 3 is inserted into the threading cavity 223 and the expansion and contraction threading channel 145. The implant component 1 and the release component 2 are configured such that when the release component 2 extends into the expansion and contraction threading channel 145, the expansion and contraction threading channel 145 expands to accommodate the insertion and movement of the suture 3. When the release component 2 is separated from the expansion and contraction threading channel 145, the expansion and contraction threading channel 145 contracts to lock the suture 3.

[0043] Therefore, according to the suture locking device 100 of the present invention, when the release component 2 extends into the expandable and contractible threading channel 145 of the expandable and contractible elastic member 13, the release component 14 can open the expandable and contractible threading channel 145, thereby causing the expandable and contractible threading channel 145 to expand in its radial direction. The cross-sectional area of ​​the expandable and contractible threading channel 145 becomes larger, and the space suitable for accommodating the passage of the suture 3 becomes larger, which not only facilitates the passage of the suture 3 through the implant component 1 but also allows the suture 3 to move freely in the expandable and contractible threading channel 145. At this time, the operator can tighten the suture 3 passing through the expandable and contractible threading channel 145 and the threading cavity 223 to the ideal length, and then release the release assembly 2; when the release assembly 2 is separated from the expandable and contractible elastic member 14, since the expandable and contractible elastic member 14 loses the support of the release assembly 2, the expandable and contractible elastic member 14 will shrink inward, that is, the expandable and contractible threading channel 145 shrinks in its radial direction, the cross-sectional area of ​​the expandable and contractible threading channel 145 becomes smaller, and the accommodating space of the suture 3 is reduced, thereby achieving the purpose of locking the suture 3 in the expandable and contractible threading channel 145. Compared with the prior art that uses external rigid force to achieve the locking of the suture 3, the suture locking device 100 of the embodiment of the present invention can not only significantly reduce the requirements for the size of the operating channel, so that it can adapt to a smaller and more flexible operating channel, but also can significantly reduce the difficulty of locking the suture 3 during surgery, effectively reducing the surgical risk.

[0044] In some embodiments of the present invention, Figure 1-Figure 6 As shown, the expandable and contractible elastic member 14 may include a fixed portion 146 and an expandable and contractible portion 147 fixedly connected to the fixed portion 146. The expandable and contractible portion 147 may include a plurality of expandable and contractible elastic sheets 1471 extending along the axial direction of the fixed portion 146 and spaced apart along the circumferential direction of the fixed portion 146. An expandable and contractible threading channel 145 is defined between the plurality of expandable and contractible elastic sheets 1471. The expandable and contractible threading channel 145 extends through the fixed portion 146. Since the plurality of expandable and contractible elastic sheets 1471 are spaced apart from each other, the release component 2 can easily extend into the expandable and contractible elastic member 14, i.e., it can easily make the expandable and contractible elastic sheets 147114 expand outwardly or contract inwardly, thereby reducing the difficulty of expanding and contracting the expandable and contractible elastic member 14. It should be noted that the “several” here refers to two or more, that is, the expandable and shrinkable elastic member 14 includes two or more expandable and shrinkable elastic sheets 1471. For example, the expandable and shrinkable elastic member 14 may include three, four or five expandable and shrinkable elastic sheets 1471. The several expandable and shrinkable elastic sheets 1471 may be evenly spaced apart along the axial direction of the fixed portion 146.

[0045] Specifically, the expandable and contractible threading channel 145 passes through the fixed portion 146 and the expandable and contractible portion 147, wherein the part of the expandable and contractible threading channel 145 formed in the fixed portion 146 may not have the expansion and contraction function, and the expandable and contractible portion 147 includes a plurality of expandable and contractible elastic sheets 1471, one end of each of the plurality of expandable and contractible elastic sheets 1471 is fixedly connected to the fixed portion 146, the other end of each of the plurality of expandable and contractible elastic sheets 1471 is a free end, and a part of the expandable and contractible threading channel 145 formed between the plurality of expandable and contractible elastic sheets 1471 can expand and contract; the plurality of expandable and contractible elastic sheets 1471 are spaced apart from each other along the circumference of the fixed portion 146, and a contraction groove may be formed between the plurality of expandable and contractible elastic sheets 1471 so that the plurality of expandable and contractible elastic sheets 1471 can expand and deform, and can also contract and deform.

[0046] Furthermore, the multiple expansion and contraction elastic sheets 1471 have an elastic effect, and can expand and deform outward when subjected to external force, and can automatically recover when the external force disappears, or can shrink inward when subjected to an inward force. The release component 2 can extend into the expansion threading channel formed by the multiple expansion and contraction elastic sheets 1471 and can be disconnected from the free ends of the multiple expansion and contraction elastic sheets 1471. For example, an internal thread can be formed on the inner wall surface of the expansion and contraction threading channel 145 formed by the multiple expansion and contraction elastic sheets 1471, and the release component 2 can be threadedly connected to the expansion and contraction elastic member 14. Optionally, the release component 2 can also be snap-connected to the expansion and contraction elastic member 14, so that the release component 2 can be fixedly connected to the expansion elastic member to be suitable for the threading of the suture 3, and it can also facilitate the separation of the release component 2 from the expansion elastic member when the suture 3 is locked.

[0047] In some embodiments of the present invention, the implant assembly may further include an implant housing 13, such as Figure 1-3 As shown, the implant shell 13 is sleeved on the outside of the expandable and contractible elastic sheet 1471. Since the expandable and contractible elastic sheet 1471 is easily deformed when the release component 2 extends into the expandable and contractible threading channel 145, the implant shell 13 is sleeved on the outside of the expandable and contractible elastic sheet 1471. On the one hand, it can limit the excessive deformation of the expandable and contractible elastic sheet 1471, thereby achieving the purpose of protecting the expandable and contractible elastic sheet 1471. The inner wall of the implant shell 13 can also exert an inward squeezing effect on the expandable and contractible elastic sheet 1471, thereby further locking the suture thread 3.

[0048] According to some embodiments of the present invention, Figure 1-Figure 5 and Figure 7 As shown, the implant component 1 can also include an implant top piece 11 and a telescopic elastic piece 12. The implant top piece 11 is formed with a connecting port connected to the expansion and contraction threading channel 145. The implant top piece 11 is connected to the fixing portion 146 of the expansion and contraction elastic piece 14, and the suture 3 can be passed through the connecting port and inserted into the expansion and contraction threading channel 145.

[0049] The telescopic elastic member 12 is sleeved on the outer side of the implant shell 13 and is telescopic along the axial direction of the implant shell 13. The implant shell 13 is provided with a blocking portion 135. The telescopic elastic member 12 is located between the blocking portion 135 and the implant top member 11. The telescopic elastic member 12 can be a spring or an elastic sleeve, etc. Optionally, the blocking portion 135 can be formed at the end of the implant shell 13 away from the implant top member 1. For example, the blocking portion 135 can be a rib formed by extending outward from a portion of the outer wall surface of the implant shell 13. The rib can be extended along the circumference of the implant shell 13 to form a ring.

[0050] When the release component 2 is connected to the expandable and contractible elastic member 14 and extends into the expandable and contractible threading channel 145, the telescopic elastic member 12 is compressed between the blocking portion 135 and the implant top member 11; when the release component 2 is separated from the expandable and contractible elastic member 14, the telescopic elastic member 12 releases potential energy to push the implant shell 13 to move and squeeze the expandable and contractible elastic member, so that the expandable and contractible threading channel 145 shrinks. Therefore, in the process of the release component 2 extending into the expandable and contractible elastic member 14, the implant shell 13 moves toward the direction close to the implant top member 11, and the blocking portion 135 and the implant top member 11 gradually approach each other. That is to say, in this process, The telescopic elastic member 12 is compressed to accumulate elastic potential energy; when the release component 2 is separated from the expandable and contractible elastic member 14, the elastic potential energy of the telescopic elastic member 12 is released, pushing the implant shell 13 to move in the direction away from the implant top member 11. During this process, the inner wall of the implant shell 13 will squeeze the outer wall of the expanded expandable and contractible elastic member 14, causing the expandable and contractible elastic member 14 to shrink inward, thereby achieving the tightening of the suture 3. It utilizes the elasticity of the telescopic elastic member 12 to achieve further tightening of the suture 3, and the structure is simple and convenient, and there is no need to use rigid force to achieve locking of the suture 3.

[0051] More specifically, the implant top member 11 and the expansion elastic member 14 may be connected by threaded connection, for example Figure 6 and Figure 7 As shown, the inner wall of the implant top member 11 is provided with an internal thread, and the fixing portion 146 of the expansion and contraction elastic member 14 is provided with a fixing external thread 141 matching the internal thread.

[0052] The release assembly 2 is preferably connected to the expansion and contraction portion 147 in a detachable manner, such as a threaded connection, for example. Fig.10 and Fig.11 As shown, a release external thread 221 is provided on the outer wall of the release component 2, and an expansion and contraction internal thread 144 matching the release external thread is provided on the inner wall of the expansion and contraction elastic member 14.

[0053] In some specific embodiments of the present invention, Figure 2-Figure 4 as well as Fig. 9As shown, the implant shell 13 has a first channel 131 and a second channel 132, the second channel 132 is connected to the first channel 131 and is suitable for the expansion and contraction elastic member 14 to pass through, the first channel 131 and the second channel 132 are coaxially arranged, the cross-sectional area of ​​the first channel 131 is smaller than the cross-sectional area of ​​the second channel 132, and the second channel 132 is formed at one end of the implant shell 13 adjacent to the release component 2, and a limiting portion 136 is formed at the connection between the first channel 131 and the second channel 132. When the implant shell moves, the expansion and contraction elastic member 14 is contracted through the limiting portion 136. Specifically, the expansion and contraction elastic member 13 is located in the first channel 131 and the second channel 132. When the release component 2 extends into the expansion and contraction threading channel 145, the expansion and contraction elastic member 13 expands. When the release component 2 is detached, the implant shell 13 moves in a direction away from the implant top member 11, and the limiting portion 136 moves accordingly to squeeze the outer wall of the expansion and contraction elastic member 14, further causing the expansion and contraction elastic member 14 to contract inwardly, thereby being able to better tighten the suture 3.

[0054] According to some embodiments of the present invention, Figure 6 and Figure 8 As shown, a limit block 142 is provided on one of the implant shell 13 and the expandable and contractible elastic member 14, and a limit groove 133 suitable for cooperating with the limit block 142 is provided on the other of the implant shell 13 and the expandable and contractible elastic member 14. The limit groove 133 cooperates with the limit block 142 to make the implant shell 13 slidable along the axial direction of the expandable and contractible elastic member 14. Specifically, the limit block 142 can be provided on the implant shell 13, and the limit groove 133 adapted to the limit block 142 can be provided on the expandable and contractible elastic member 14. Alternatively, the limit groove 133 can be provided on the implant shell 13, and the limit block 142 adapted to the limit groove 133 can be provided on the expandable and contractible elastic member 14. Through the cooperation of the limit groove 133 and the limit block 142, not only the relative movement direction of the implant shell 13 and the expandable and contractible elastic member 14 can be limited, but also the implant shell 13 can be limited to prevent the implant shell 13 from moving in the circumferential direction. The structure of the limit block 142 can be a long strip structure extending along the axial direction, which can also be called a limit rib, but the structure of the limit block 142 is not limited to this, and can also be other structures that can limit the relative movement of the implant shell 13 and the expandable elastic member 14.

[0055] According to some embodiments of the present invention, Figure 1-Figure 4 , Fig. 9 and Fig.10As shown, the release component 2 may include a release shell 21 and a release core 22. The release shell 21 is connected to the implant shell 13. The release core 22 is inserted into the release shell 21 and is suitable for being connected to the expandable and contractible elastic member 14. In this way, the release core 22 can be limited by the connection and fixation between the release shell 21 and the implant component 1 so as to support the release core 22. The release core 22 can pass through the release shell 21 and extend into the expandable and contractible threading channel 145 to be connected to the expandable and contractible elastic member 14.

[0056] The release shell 21 is connected to the implant shell 13 in such a way that a limiting column 211 is provided on one of the release shell 21 and the implant shell 13, and a limiting hole 134 suitable for cooperating with the limiting column 211 is provided on the other of the release shell 21 and the implant shell 13. Specifically, the limiting column 211 may be provided on the release shell 21, and the implant shell 13 may be provided with a limiting hole 134 cooperating with the limiting column 211. Alternatively, the limiting hole 134 may be provided on the release shell 21, and the limiting column 211 may be provided on the implant shell 13. Thus, the assembly of the implant shell 13 and the release shell 21 is achieved by inserting the limiting column 211 into the limiting hole 134.

[0057] According to some embodiments of the present invention, Figure 1 and Fig.12 As shown, a first step 212 is formed in the release shell 21, and a second step 222 is provided in the release core 22. When the release core 22 is inserted into the release shell 21, the first step 212 stops at the second step 222. In this way, on the one hand, the cooperation of the first step 212 and the second step 222 can realize the supporting effect of the release shell 21 on the release core 22. On the other hand, it can also limit the extension length of the release core 21 into the expansion and contraction elastic member 14 to prevent the release core 21 from excessively extending into the expansion and contraction elastic member 14 and causing damage to the expansion and contraction elastic member 14, so as to reasonably control the extension degree of the release core 22. At the same time, by controlling the extension degree of the release core 22, it is also possible to effectively control the size of the expansion and contraction threading channel 145.

[0058] According to some embodiments of the present invention, Figure 6 As shown, the expandable elastic member 14 is formed with serrations to lock the suture 3, and the serrations can further lock the suture 3 so that the suture 3 cannot move arbitrarily in the expandable threading channel 145, further improving the stability and reliability of the locking of the suture 3.

[0059] A suture locking device 100 according to a specific embodiment of the present invention will be described below with reference to the accompanying drawings.

[0060] See also Figures 1 to 11 The suture locking device 100 according to an embodiment of the present invention includes an implantation component 1 and a release component 2.

[0061] Combination Figure 1-9 As shown, the implant assembly 1 includes an implant top member 11, a telescopic elastic member 12, an implant shell 13 and an expandable and contractible elastic member 14, wherein Figure 6 As shown, the expansion and contraction elastic member 14 includes a fixed portion 146 and an expansion and contraction portion 147. The expansion and contraction portion 147 includes a plurality of expansion and contraction elastic sheets 1471 extending along the axial direction of the fixed portion 146 and spaced apart along the circumferential direction of the fixed portion 146. The fixed portion 146 and the plurality of expansion and contraction elastic sheets 1471 can be integrally formed. An expansion and contraction threading channel 145 is defined in the expansion and contraction elastic member 13. The expansion and contraction threading channel 145 passes through the fixed portion 146 and the expansion and contraction portion 147. The plurality of expansion and contraction elastic sheets 1471 can expand outwardly or contract inwardly, so that the formed expansion and contraction threading channel 145 can expand and contract.

[0062] Combination Figure 1-Figure 4 , Figure 6 and Figure 7 The implant top piece 11 is formed with a connecting port connected to the expansion and contraction threading channel 145, and the implant top piece 11 is threadedly connected to the outer surface of the expansion and contraction elastic piece 14. Specifically, an internal top piece thread is provided in the implant top piece 11, and a fixed external thread 141 is provided on the fixing portion 146 of the expansion and contraction elastic piece 14; a blocking portion 135 is formed at one end of the implant shell 13 away from the implant top piece 11, and the telescopic elastic piece 12 is sleeved on the outside of the implant shell 13 and located between the implant top piece 11 and the blocking portion 135. The telescopic elastic piece 12 can be limited by the implant top piece 11 and the blocking portion 135.

[0063] The implant shell 13 is sleeved on the outside of a plurality of expandable and contractible elastic members 14. A limiting groove 133 is provided on the inner wall of the implant shell 13. A limiting block 142 is formed on the outer wall of the expandable and contractible elastic member 14. The limiting block 142 and the limiting groove 133 can be slidably matched, so that the implant shell 1 can slide axially along the expandable and contractible elastic member 14.

[0064] Combination Figure 4 , Figure 6 , Figure 8 and Fig. 9 The implant shell 13 has a first channel 131 and a second channel 132. The second channel 132 is connected to the first channel 131 and is suitable for the expansion and contraction elastic member 14 to pass through. The first channel 131 and the second channel 132 are coaxially arranged. The cross-sectional area of ​​the first channel 131 is smaller than the cross-sectional area of ​​the second channel 132. The second channel 132 is formed at one end of the implant shell 13 adjacent to the release component, and a limiting portion 136 is formed at the connection between the first channel 131 and the second channel 132.

[0065] Combination Figure 1-Figure 4 As shown, the release assembly 2 includes a release shell 21 and a release inner core 22 inserted into the release shell 21. Figure 8-Figure 9As shown, a first step 212 is formed in the release shell 21, and a second step 222 is provided in the release inner core 22. When the release inner core 22 is inserted into the release shell 21, the first step 212 stops the second step 222. The release shell 21 is provided with a limiting column 211, and the blocking portion 135 is provided with a limiting hole 134 that cooperates with the limiting column 211. The cooperation between the limiting column 211 and the limiting hole 124 can realize the connection between the release shell 21 and the implant shell 13 and the limiting of the implant shell 13.

[0066] The outer wall of the release inner core 22 is provided with a release external thread 221, and a plurality of expansion and contraction elastic sheets 1471 are formed with expansion and contraction external threads 144. The release external thread 221 cooperates with the expansion and contraction external thread 144 so that the release inner core 22 can be screwed into the expansion and contraction elastic member 14.

[0067] The specific operation process of the suture locking device 100 is described below in conjunction with the above-mentioned embodiment.

[0068] The schematic diagram of the suture locking device 100 of this embodiment when the implant component 1 and the release component 2 are not assembled is as shown in FIG. Figure 3 As shown, the release component 2 extends into the expansion and contraction threading channel 145 and is assembled with the implant component 1. Figure 2 shown.

[0069] Specifically, the assembly process is as follows: the implant shell 13 is sleeved on the outside of the expansion and contraction elastic member 14, the release inner core 22 is inserted into the release shell 21, the release inner core 22 passes through the release shell 21, and then the release outer thread 221 is screwed into the expansion and contraction inner thread 144. During the screwing process, the implant shell 13 can limit the deformation of several expansion and contraction elastic sheets 1471, thereby protecting them. Then the telescopic elastic member 12 is sleeved on the outside of the implant shell 13, and the implant top member 11 is threadedly connected with the fixing portion 146 of the expansion and contraction elastic member 14, so that the telescopic elastic member 12 is compressed between the implant top member 11 and the blocking portion 135, and the telescopic elastic member 12 is subjected to the accumulation of elastic potential energy.

[0070] After assembly, since the release inner core 22 stretches out a number of expandable elastic sheets 1471, the expandable threading channel 145 expands, that is, the gap for accommodating the suture 3 becomes larger, so that the suture 3 can move freely in the expanded expandable threading channel 145. At this time, the operator can tighten the suture 3 to the ideal length to prepare for the next step of locking the suture 3.

[0071] The locking process of the suture locking device 100 of this embodiment is as follows: the operator unscrews the release inner core 22 from the expandable elastic member 14. Due to the loss of support from the release component 2, the telescopic elastic member 12 releases its elastic potential energy, pushing the implant shell 13 to move along the axial direction of the expandable elastic member 14 in a direction away from the implant top member 11. During this process, the implant shell 13 moves and squeezes a plurality of expandable elastic sheets 1471, causing the plurality of expandable elastic sheets 1471 to shrink inward, thereby shrinking the expandable threading channel 145, that is, the gap for accommodating the suture 3 becomes smaller, thereby achieving the purpose of locking the suture 3. The expandable elastic member 14 is provided with serrations to further enhance the locking effect of the suture 32. The locked suture locking device 100 is as follows: Figure 3 As shown, thereafter, the release inner core 22 and the release outer shell 21 are withdrawn, and the implant assembly 1 remains in the human body.

[0072] This preferred embodiment utilizes the spring potential energy of the telescopic elastic member 12 to push the implant shell 13 to move and squeeze the expandable and contractible elastic member 13, causing the expandable and contractible elastic member 14 to contract, thereby locking the suture 3, further improving the locking reliability of the suture 3, and the locking action of the suture 3 only requires twisting out the release inner core, which does not require a lot of force, saving time and effort.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A suture locking device, characterized in that: include: An implant component, the implant component comprising an expandable and contractible elastic member, wherein the expandable and contractible elastic member has an expandable and contractible threading channel which penetrates the elastic member in the axial direction and is expandable and contractible in the radial direction; A release assembly, wherein the release assembly is formed with a threading cavity extending along its axial direction, the release assembly at least partially extends into the expanding and contracting threading channel to be detachably connected with the implant assembly, a suture is threaded through the threading cavity and the expanding and contracting threading channel, the implant assembly and the release assembly are configured such that when the release assembly extends into the expanding and contracting threading channel, the expanding and contracting threading channel expands to accommodate the threading movement of the suture, and when the release assembly is detached from the expanding and contracting threading channel, the expanding and contracting threading channel contracts to lock the suture; The implant assembly further comprises: An implant top piece, wherein the implant top piece is formed with a communication port communicating with the expansion and contraction threading channel, and the implant top piece is connected to a fixing portion of the expansion and contraction elastic member; implant shell; A telescopic elastic member, which is sleeved on the outer side of the implant shell and can be retracted along the axial direction of the implant shell, and the implant shell is provided with a blocking portion, and when the release component extends into the expansion and contraction threading channel, the telescopic elastic member is compressed between the blocking portion and the implant top member; when the release component is separated from the expansion and contraction elastic member, the telescopic elastic member is released to push the implant shell to move and squeeze the expansion and contraction elastic member; The implant shell has a first channel and a second channel, the second channel is connected to the first channel and is suitable for the expansion and contraction elastic member to pass through, the first channel and the second channel are coaxially arranged and the cross-sectional area thereof is smaller than the cross-sectional area of ​​the second channel, the second channel is formed at one end of the implant shell adjacent to the release component, and a limiting portion is formed at the connection between the first channel and the second channel. When the implant shell moves, the expansion and contraction elastic member is squeezed through the limiting portion to shrink the expansion and contraction threading channel.

2. The suture locking device according to claim 1, characterized in that: The expandable and contractible elastic member includes a fixed portion and an expandable and contractible portion fixedly connected to the fixed portion, the expandable and contractible portion includes a plurality of expandable and contractible elastic sheets extending along the axial direction of the fixed portion and spaced apart along the circumferential direction of the fixed portion, an expandable and contractible portion of the expandable and contractible threading channel is defined between the plurality of expandable and contractible elastic sheets, and the expandable and contractible threading channel extends through the fixed portion.

3. The suture locking device according to claim 2, characterized in that: The implant shell is sleeved on the outer sides of a plurality of the expansion and contraction elastic sheets.

4. The suture locking device according to claim 1, characterized in that: A limit block is provided on one of the implant shell and the expandable elastic member, and a limit groove suitable for cooperating with the limit block is provided on the other of the implant shell and the expandable elastic member, and the limit groove cooperates with the limit block to limit the relative movement of the implant shell and the expandable elastic member.

5. The suture locking device according to claim 3, characterized in that: The release assembly comprises a release shell and a release inner core, wherein the release shell is connected to the implant shell, and the release inner core is inserted into the release shell and is suitable for extending into the expansion and contraction threading channel and connected to the expansion and contraction elastic member.

6. The suture locking device according to claim 5, characterized in that: One of the release shell and the implant shell is provided with a limiting column, and the other of the release shell and the implant shell is provided with a limiting hole suitable for cooperating with the limiting column.

7. The suture locking device according to claim 6, characterized in that: A first step is formed in the release shell, and a second step is provided in the release inner core. When the release inner core is inserted into the release shell, the second step stops at the first step to be connected with the expansion and contraction elastic member.

8. The suture locking device according to claim 1, characterized in that: The expandable elastic member is formed with saw teeth to lock the suture line.

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