Screw-in knotless anchor inserter

Abstract

This invention relates to the field of medical device technology and discloses a screw-in knotless anchor inserter, comprising an inserter body and a tension measuring mechanism. The inserter body includes an anchor and a drive assembly. The anchor is disposed at the head end of the drive assembly and is used to screw into the bone to compress and fix a first suture. The drive assembly is used to drive the anchor to rotate. The tension measuring mechanism is disposed on the inserter body and includes a fixed part, a movable part, and an elastic part. The fixed part is fixedly connected to the drive assembly, the movable part is movably connected to the fixed part and can slide axially relative to the fixed part, and the elastic part is disposed between the fixed part and the movable part. The movable part has a winding part and an indicator part. When the first suture is wound around the winding part and tightened, it pulls the movable part to slide relative to the fixed part and compresses the elastic part. The indicator part slides synchronously with the movable part and outputs a readable value corresponding to the tension of the first suture, thereby realizing real-time quantitative measurement of suture tension during surgery, effectively improving surgical accuracy and postoperative results.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a screw-in, knot-free anchor inserter. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In the field of orthopedic sports medicine, in the repair surgery of soft tissue avulsions or tears such as rotator cuff injuries, anchors are often used to fix the injured tendon or ligament to the bone surface to achieve tendon-bone healing. Screw-in knotless anchors are widely used due to their ease of operation and the absence of external knotting. The surgical procedure typically includes: first, suturing one end of the suture to the injured soft tissue; then, passing the suture through the anchor head; subsequently, inserting the anchor head and suture together into a pre-drilled bone hole; and finally, screwing the anchor into the bone hole using a rotating inserter. The compression between the anchor and the bone hole presses the suture tightly against the bone wall, completing the fixation of the soft tissue.

[0004] In the use of existing screw-in knotless anchor inserters, the control of suture tension mainly relies on the surgeon's feel and experience, lacking objective quantitative indicators. The tension applied by different surgeons, and even by the same surgeon in different operations, may vary, resulting in inconsistent soft tissue fixation tension, which reduces surgical precision and affects postoperative healing and functional recovery. Summary of the Invention

[0005] The purpose of this invention is to at least solve the problem that existing screw-in knotless anchor inserters cannot objectively quantify suture tension during surgery, leading to reduced surgical precision. This objective is achieved through the following technical solution: This invention proposes a screw-in, knot-free anchor inserter, comprising: The inserter body includes an anchor and a drive assembly. The anchor is disposed at the head end of the drive assembly and is used to screw into the bone after the first suture is tightened and to squeeze and fix the first suture to the bone wall. The drive assembly is used to drive the anchor to rotate so that it screws into the bone. A tension measuring mechanism is disposed on the inserter body. The tension measuring mechanism includes a fixed member, a movable member, and a first elastic member. The fixed member is fixedly connected to the drive assembly. The movable member is movably connected to the fixed member and can slide axially relative to the fixed member. The first elastic member is disposed between the fixed member and the movable member. The movable member is provided with a winding part and an indicator part. The winding part is used for winding the first suture. When the first suture is tightened by the winding part, it pulls the movable member to move and compresses the first elastic member. The indicator part outputs a readable value corresponding to the tension of the first suture as the movable member slides.

[0006] The screw-in knotless anchor inserter of the present invention incorporates a tension measuring mechanism. A fixed component is fixedly mounted on a drive assembly, a movable component is movably fitted within the fixed component and can slide axially relative to the fixed component, and an elastic component is positioned between the fixed component and the movable component. A winding portion and an indicator portion are located on the movable component. When the first suture is wound around the winding portion and tightened, it pulls on the movable component, causing it to slide axially relative to the fixed component and compress the elastic component. The indicator portion on the movable component moves synchronously with the movable component and outputs a readable tension value corresponding to the displacement. This enables real-time quantitative measurement of suture tension during surgery, avoiding inconsistencies in tension due to subjective differences in feel, ensuring the consistency and controllability of soft tissue fixation tension, thereby improving surgical precision and postoperative outcomes.

[0007] In addition, the screw-in knotless anchor inserter according to the present invention may also have the following additional technical features: In some embodiments of the present invention, the fixing member includes an outer sleeve, the movable member includes a slide tube, and the first elastic member includes a first spring; The outer tube is fixedly sleeved on the drive assembly, and the sliding tube is sleeved inside the outer tube. The first spring is disposed between the outer tube and the sliding tube, and its two ends abut against the outer tube and the sliding tube respectively. The sliding tube compresses the first spring under the pulling action when the first suture is tightened. The sliding displacement of the sliding tube relative to the outer tube is converted into the first suture tension reading through the indicator.

[0008] In some embodiments of the present invention, a sliding guide structure is provided between the slide tube and the outer tube. The sliding guide structure includes a pin and a groove. The pin is fixed on one of the slide tube and the outer tube, and the groove is formed on the other of the slide tube and the outer tube. The pin is embedded in the groove and can slide along the groove.

[0009] In some embodiments of the present invention, the slide tube includes an installation section, the winding portion includes a ratchet bar, the ratchet bar is rotatably mounted on the slide tube, the installation section has an installation hole for the ratchet bar to pass through, the ratchet bar passes through the installation hole, and the ratchet bar has a winding groove for the first sewing thread to be wound.

[0010] In some embodiments of the present invention, the mounting section has two opposing support walls and a connecting wall connecting the two support walls. The two support walls are respectively provided with mounting holes. The ratchet rod passes through the two mounting holes. A knob is fixedly provided at one end of the ratchet rod, and a tail cap is fixedly provided at the other end of the ratchet rod. The knob and the tail cap are respectively located on opposite sides of the two support walls.

[0011] In some embodiments of the present invention, a limiting component is provided on one side of the ratchet lever. The limiting component includes a limiting block and a second elastic member. An assembly hole is provided on one of the supporting walls. One end of the second elastic member is installed in the assembly hole. The limiting block includes a limiting part and a pressing part. The other end of the second elastic member abuts against the pressing part. The limiting part has an abutting surface. The abutting surface abuts against the ratchet to restrict the ratchet lever from rotating in the opposite direction.

[0012] In some embodiments of the present invention, the slide tube further includes a scale section, the scale section being fixedly connected to the mounting section, the indicator being a numerical scale disposed on the scale section, the numerical scale being arranged along the axial direction of the scale section and its scale value directly corresponding to the Newton value of the first suture tension.

[0013] In some embodiments of the present invention, the anchor includes a nail head and an anchor pin, the nail head being disposed at the head end of the drive assembly and detachably connected to the drive assembly via a second suture passing through the nail head, the anchor pin being sleeved on the drive assembly and located at the tail end of the nail head, and the outer wall of the anchor pin being provided with external threads for screwing into the bone.

[0014] In some embodiments of the present invention, the nail head has a tip and a tail end, and the nail head is provided with a first thread hole and a second thread hole. The first thread hole is located near the tip and extends through both sides of the nail head for the first suture connected to soft tissue to pass through. The second thread hole is located near the tail end and extends through both sides of the nail head for the second suture temporarily fixing the nail head to pass through.

[0015] In some embodiments of the present invention, the driving assembly includes a positioning rod, a push rod, and a threaded rod. The positioning rod passes through the anchor and its head is connected to the nail head via the second thread. The threaded rod is fixedly connected to the positioning rod. The push rod is fitted onto the outside of the threaded rod, and the two are threaded together. The neck of the threaded rod has a groove, and the tail of the threaded rod has a thread-holding groove. The groove is used for the second thread, which passes through the second thread hole and is led out through the positioning rod, to be wound around. The thread-holding groove is used to hold the second thread. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1A schematic diagram of the structure of a screw-in knotless anchor inserter according to an embodiment of the present invention is shown. Figure 2 An exploded view of a screw-in knotless anchor inserter according to an embodiment of the present invention is shown schematically. Figure 3 A schematic diagram of the tension measuring mechanism of a screw-in knotless anchor inserter according to an embodiment of the present invention is shown. Figure 4 A schematic diagram of the ratchet lever of a screw-in knotless anchor inserter according to an embodiment of the present invention is shown. Figure 5 A schematic diagram of the structure of the limiting block of the screw-in knotless anchor inserter according to an embodiment of the present invention is shown. Figure 6 A schematic diagram of the nail head of a screw-in knotless anchor inserter according to an embodiment of the present invention is shown.

[0017] The attached figures are labeled as follows: 1. Anchor; 10. Nail head; 100. First through hole; 101. Second through hole; 11. Anchor nail; 2. Drive assembly; 20. Positioning rod; 21. Push rod; 22. Threaded rod; 220. Groove; 221. Handle; 2210. Wire clamping groove; 3. Fasteners; 30. Outer sleeve; 4. Moving parts; 40. Sliding tube; 400. Support wall; 401. Connecting wall; 402. Sliding hole; 403. Scale section; 5. First elastic element; 50. First spring; 6. Winding section; 60. Ratchet lever; 600. First lever body; 601. Ratchet; 602. Winding lever; 6020. Winding groove; 61. Knob; 62. Tail cap; 70. Pin; 71. Groove; 80. Limiting block; 800. Limiting part; 8000. Abutting surface; 801. Pressing part; 802. Assembly hole; 81. Second elastic element; 810. Second spring; 83. Fixing pin; 9. Second suture. Detailed Implementation

[0018] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0019] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0020] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0021] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0022] like Figures 1 to 6 As shown, according to an embodiment of the present invention, a screw-in knotless anchor 11 inserter is provided, including an inserter body and a tension measuring mechanism disposed on the inserter body.

[0023] The inserter body includes an anchor 1 and a drive assembly 2. The anchor 1 is used to implant into the bone hole during surgery and compress and fix the first suture. It is located at the tip of the drive assembly 2 and is driven by the drive assembly 2 to rotate into the bone. The drive assembly 2 serves as the operating end, extending axially for the surgeon to hold and apply rotational torque. The rotational motion is transmitted to the anchor 1 through a mechanical transmission. The tip of the drive assembly 2 has a connection structure that mates with the anchor 1. The anchor 1 is detachably installed on this connection structure, allowing it to separate from the drive assembly 2 and remain within the bone after implantation.

[0024] The tension measuring mechanism is used to measure the tension of the first thread before the anchor 1 is screwed in. The tension measuring mechanism includes a fixed member 3, a movable member 4, and a first elastic member 5. The fixed member 3 is fixedly mounted on the drive assembly 2 and remains stationary relative to the drive assembly 2. The movable member 4 is mounted on the fixed member 3 and forms an axial sliding fit with the fixed member 3, allowing the movable member 4 to slide relative to the fixed member 3 along the axial direction of the drive assembly 2. The movable member 4 has a winding part 6 and an indicator part. The winding part 6 is used for winding the first thread, and the indicator part is used to display information reflecting the sliding displacement of the movable member 4 relative to the fixed member 3. The first elastic member 5 is disposed between the fixed member 3 and the movable member 4, and abuts against both the fixed member 3 and the movable member 4. When the movable member 4 slides relative to the fixed member 3, the movable member 4 compresses the first elastic member 5, causing the first elastic member 5 to undergo elastic deformation. The first elastic member 5 applies an elastic force to the movable member 4 in the opposite direction to its sliding direction.

[0025] In use, one end of the first suture is fixedly connected to the soft tissue to be repaired, and the other end passes through the anchor 1 and is wrapped around the winding part 6. When the surgeon pulls on this end of the first suture to tighten it, the first suture applies a pulling force to the winding part 6. This pulling force is transmitted to the movable part 4, driving the movable part 4 to slide relative to the fixed part 3 in the direction of compressing the first elastic part 5. During the sliding process of the movable part 4, the first elastic part 5 is gradually compressed. When the elastic force generated by it reaches equilibrium with the tension of the first suture, the movable part 4 stops sliding. At this time, the indicator stops with the movable part 4 at a position corresponding to the current suture tension, and the surgeon can obtain the tension value of the first suture by reading the value displayed on the indicator.

[0026] Once the tension value displayed on the indicator reaches the surgical requirements, the surgeon maintains the current tension of the first suture and screws the anchor 1 into the bone hole using the drive assembly 2. During insertion, the anchor 1 presses the first suture firmly against the inner wall of the bone hole, completing the fixed connection between the soft tissue and the bone. Throughout this process, the tension measuring mechanism provides the surgeon with real-time tension feedback.

[0027] The screw-in knotless anchor 11 inserter of the present invention incorporates a tension measuring mechanism. A fixed member 3 is fixedly mounted on a driving assembly 2, and a movable member 4 is movably fitted within the fixed member 3 and can slide axially relative to the fixed member 3. An elastic element is positioned between the fixed member 3 and the movable member 4. A winding portion 6 and an indicator portion are located on the movable member 4. When the first suture is wound around the winding portion 6 and tightened, it pulls on the movable member 4, causing the movable member 4 to slide axially relative to the fixed member 3 and compress the elastic element. The indicator portion on the movable member 4 moves synchronously with the movable member 4 and outputs a readable tension value corresponding to the displacement. This enables real-time quantitative measurement of suture tension during surgery, avoiding inconsistencies in tension due to subjective differences in feel, ensuring the consistency and controllability of soft tissue fixation tension, thereby improving surgical precision and postoperative outcomes.

[0028] In some embodiments of the present invention, the fixing member 3 includes an outer sleeve 30, the movable member 4 includes a slide tube 40, and the first elastic member 5 includes a first spring 50.

[0029] The outer sleeve 30 is a hollow cylindrical component, fixedly fitted onto the outside of the drive assembly 2. The inner cavity of the outer sleeve 30 extends axially along the drive assembly 2. A stepped end is provided within the inner cavity of the outer sleeve 30, located at a predetermined position. This stepped end divides the inner cavity of the outer sleeve 30 into a first segment and a second segment that are interconnected. The inner diameter of the first segment is larger than that of the second segment, and the stepped end is located on the transition surface between the first and second segments. The outer sleeve 30 is fixedly connected to the drive assembly 2, ensuring that the outer sleeve 30 remains stationary relative to the drive assembly 2 during tension measurement and the screwing in of the anchor 1. The inner wall of the outer sleeve 30 has a smooth surface, providing a sliding mating surface for the slide tube 40.

[0030] The slide tube 40 is a cylindrical or cylindrical component, with its outer diameter matching the inner diameter of the outer sleeve 30. The slide tube 40 is inserted into the first cavity of the outer sleeve 30 from its open tail end; that is, the head end of the slide tube 40 is located within the first cavity, and the tail end extends outside the outer sleeve 30. A clearance fit is formed between the outer wall of the slide tube 40 and the inner wall of the first cavity, allowing the slide tube 40 to slide freely relative to the outer sleeve 30 along its axial direction. The inner wall of the first cavity acts as a radial limiter on the outer wall of the slide tube 40, restricting the slide tube 40 to only axial movement and preventing radial movement during sliding.

[0031] The first spring 50 is disposed in the receiving space between the stepped end and the slide tube 40. One end of the first spring 50 abuts against the end face of the stepped end, and the other end of the first spring 50 abuts against the end face of the slide tube 40. The first spring 50 is always in a compressed state or a free state, applying an elastic force to the slide tube 40 toward the head end of the outer sleeve 30.

[0032] The slide tube 40 is provided with a winding section 6 and an indicator section. The winding section 6 is fixedly installed at the head end of the slide tube 40 and is used for winding the first suture. After the first suture is wound on the winding section 6, its tension is transmitted to the slide tube 40 through the winding section 6. The indicator section is provided on the outer wall of the slide tube 40 and extends along the axial direction of the slide tube 40. The indicator section can be a scale mark or a continuous scale line arranged along the axial direction of the slide tube 40. Using the end face of the outer tube 30 as the reading reference, the tension reading of the first suture can be obtained by reading the position change of the indicator section relative to the end face of the outer tube 30.

[0033] In some embodiments of the present invention, a sliding guide structure is provided between the slide tube 40 and the outer sleeve 30. The sliding guide structure includes a pin 70 and a groove 71. In this embodiment, the pin 70 is fixed to the outer sleeve 30, and the groove 71 is formed on the slide tube 40 and extends along the axial direction of the slide tube 40. Specifically, the pin 70 extends into the inner cavity of the outer sleeve 30, and both ends of the pin 70 are fixed to the tube wall of the outer sleeve 30 respectively; the groove 71 is provided on the tube wall of the slide tube 40, and the groove 71 extends along the axial direction of the slide tube 40, with its extension direction consistent with the sliding direction of the slide tube 40. When the slide tube 40 is assembled inside the outer sleeve 30, one end of the pin 70 extending into the inner cavity is embedded in the groove 71. The outer diameter of the pin 70 is adapted to the width of the groove 71, so that the pin 70 can only slide relative to the groove 71 along its extension direction, and cannot move relative to the groove 71 in its width direction. The length of the groove 71 defines the sliding range of the slide tube 40 relative to the outer tube 30, and the two end walls of the groove 71 are the front stop point and the rear stop point of the slide tube 40, respectively. In other embodiments, the pin 70 may also be provided on the slide tube 40, and the groove 71 may also be formed on the outer tube.

[0034] By fixing the pin 70 to the outer tube 30 and setting the slide groove 71 on the slide tube 40, when the slide tube 40 slides relative to the outer tube 30 under the pull of the first seam, the pin 70 remains stationary relative to the outer tube 30. When the slide tube 40 moves, the slide groove 71 slides along the pin 70. The cooperation between the pin 70 and the slide groove 71 guides and limits the movement trajectory of the slide tube 40, ensuring that the slide tube 40 always slides linearly along the axial direction of the outer tube 30. At the same time, the cooperation between the pin 70 and the slide groove 71 also plays an anti-rotation role, preventing the slide tube 40 from rotating around its own axis during sliding, ensuring that the scale mark of the indicator always faces the reading direction. In addition, the two end walls of the slide groove 71 abut against the pin 70, limiting the maximum sliding stroke of the slide tube 40, preventing the slide tube 40 from sliding excessively, causing the first spring 50 to exceed its elastic limit or the slide tube 40 to fall out of the outer tube 30.

[0035] In some embodiments of the present invention, the slide tube 40 includes a mounting section disposed at the head end of the slide tube 40, which includes two opposing support walls 400 and a connecting wall 401 connecting the two support walls 400. The two support walls 400 are radially opposite to each other along the slide tube 400, forming a receiving space between them. The connecting wall 401 is located between the two support walls 400 and is fixedly connected to each of the two support walls 400. The two support walls 400 are respectively provided with coaxially opposite mounting holes, and the axes of the two mounting holes are collinear. The connecting wall 401 is provided with a sliding hole 402, which extends axially along the slide tube 40, and the slide tube 40 is slidably connected to the drive assembly 2 through the sliding hole 402.

[0036] The winding part 6 includes a ratchet lever 60, which is integrally inserted into two mounting holes. The ratchet lever 60 includes a first rod body 600, a ratchet 601 fixedly mounted on the first rod body 600, and a winding rod 602 fixedly sleeved on the first rod body 600. The first rod body 600 is a slender cylindrical component, the outer diameter of which matches the inner diameter of the mounting hole, allowing the first rod body 600 to rotate freely within the mounting hole. Both ends of the first rod body 600 pass through mounting holes on the two support walls 400 and extend to the outside of the support walls 400. The winding rod 602 is fixedly sleeved on the first rod body 600 and is located in the receiving space between the two support walls 400. A winding groove 6020 is provided on the upper part of the winding rod 602, and the winding groove 6020 has an opening through which the first thread is wound onto the winding rod 602. The outer diameter of the winding rod 602 is larger than the outer diameter of the first rod body 600 and larger than the inner diameter of the mounting hole, so that the winding rod 602 is confined in the accommodating space between the two support walls 400 to limit the winding rod 602.

[0037] The ratchet 601 has multiple ratchet teeth on its outer circumference, evenly distributed along its circumference. Each ratchet tooth has a driving surface and a locking surface; the driving surface is an inclined or curved surface, and the locking surface is a plane or near-plane. When the ratchet lever 60 rotates in the direction of thread tightening, the abutment surface 8000 of the limiting block 80 slides along the driving surface of the ratchet tooth, allowing the ratchet lever 60 to rotate. When the ratchet lever 60 has a tendency to rotate in the opposite direction, the abutment surface 8000 of the limiting block 80 abuts against the locking surface of the ratchet tooth, preventing the ratchet lever 60 from rotating in the opposite direction. The number of ratchet teeth is set according to the accuracy requirements of thread tension adjustment; the more teeth, the higher the step accuracy of tension adjustment.

[0038] The ratchet 601 is fixedly mounted on the first rod body 600 and located on the outside of one of the support walls 400. One of the support walls 400 (i.e. the support wall 400 on the side where the ratchet 601 is located) is provided with a clearance structure. The clearance structure is a curved surface provided on the surface of the support wall 400 away from the other support wall 400. The curved surface has a smooth transition and its top edge is lower than the top of the support wall 400. It is used to clear the ratchet 601 so that the ratchet 601 does not exceed the top of the support wall 400 or only slightly exceeds it after installation. This makes the overall structure more compact and reduces the radial dimension of the inserter head.

[0039] A knob 61 is fixedly mounted on one end of the ratchet lever 60, and a cap 62 is fixedly mounted on the other end. The knob 61 and cap 62 are located on opposite sides of two support walls 400, i.e., the knob 61 is located on the outside of one support wall 400, and the cap 62 is located on the outside of the other support wall 400. Both the knob 61 and cap 62 are fixedly connected to the first lever body 600. The knob 61 is used by the operator to grip and apply rotational force to rotate the ratchet lever 60, while the cap 62 is used to axially limit and provide auxiliary support to the ratchet lever 60 from the other side. The outer circumferential surface of the knob 61 is provided with anti-slip textures, which can be knurled, straight-lined, or mesh-like. The anti-slip textures extend circumferentially along the knob 61 to increase the friction between the operator's fingers and the knob 61, facilitating the operator's grip on the knob 61 and application of rotational torque.

[0040] In some embodiments of the present invention, a limiting component is provided on one side of the ratchet lever 60, and the limiting component is located at the top of the curved surface. The limiting component includes a limiting block 80 and a second elastic member 81. A mounting hole 802 is provided on the curved surface. The mounting hole 802 is a blind hole with a flat bottom. The axial direction of the mounting hole 802 is perpendicular to the axial direction of the slide tube 40. One end of the second spring 810 extends into the mounting hole 802 and is fixedly installed at the bottom or side wall of the mounting hole 802. The other end of the second spring 810 extends out of the mounting hole 802. The limiting block 80 is located above the ratchet 601. The middle part of the limiting block 80 is rotatably connected to the support arm by a fixing pin 83. The two ends of the limiting block 80 are a limiting part 800 and a pressing part 801, respectively. The limiting part 800 is arranged in the direction of the ratchet 601 and has an abutment surface 8000. When the abutment surface 8000 contacts the teeth of the ratchet 601, the abutment surface 8000 stops on the tooth surface. The pressing part 801 abuts against the second spring 810. The limiting block 80 forms a lever structure with the connection point between the middle part and the support wall 400 as the fulcrum.

[0041] When the pressing part 801 is pressed, the pressing part 801 moves downward against the elastic force of the second spring 810. The limiting block 80 rotates around the connection point between its middle part and the support wall 400. The limiting part 800 is lifted upward under the action of the lever. The abutment surface 8000 moves upward as the limiting part 800 is lifted, disengaging from the teeth of the ratchet 601. At this time, the rotation of the ratchet lever 60 is not restricted by the abutment surface 8000 and can rotate freely in the opposite direction. When the pressing part 801 is released, the elastic force of the second spring 810 pushes the pressing part 801 to move upward and reset. The limiting part 800 falls downward, and the abutment surface 8000 moves downward accordingly, re-forming an abutment engagement with the teeth of the ratchet 601. The ratchet lever 60 is restricted and cannot rotate in the opposite direction.

[0042] By setting a limiting component, the limiting block 80, under the elastic force of the second spring 810, always has a tendency to move towards the ratchet 601, so that the contact surface 8000 and the teeth of the ratchet 601 remain in a normally closed contact state. The ratchet lever 60 is always locked and cannot rotate in the reverse direction when the pressing part 801 is not pressed by external force, so that the suture tension is automatically maintained constant after the suture is tightened, without the surgeon having to apply continuous force to maintain it. When the surgeon needs to release the suture tension, he only needs to press the pressing part 801 down, the limiting part 800 is lifted up, the contact surface 8000 disengages from the teeth of the ratchet 601, and the ratchet lever 60 can rotate freely in the reverse direction. The operation is convenient and allows for quick adjustment of the suture tension as needed during the operation, improving the flexibility and efficiency of the surgical operation.

[0043] In some embodiments of the present invention, the slide tube 40 further includes a scale section 403, which is fixedly connected to the mounting section and located at the front end of the mounting section. The two can be integrally formed or fixed by welding. The outer wall of the scale section 403 is a cylindrical surface or a plane. The indicating part is a numerical scale provided on the outer wall of the scale section 403. The numerical scale is arranged along the axial direction of the scale section 403, that is, along the sliding direction of the slide tube 40. The marked value of the numerical scale directly corresponds to the Newton value of the first seam tension. The numerical scale occupies a certain axial length on the scale section 403. This length range covers the displacement of the slide tube 40 corresponding to the entire working stroke of the first spring 50 from the free state to the maximum compression state. The end face of the tube opening of the outer sleeve 30 is used as the reading reference. When the first suture is not tightened, the slide tube 40 is in its initial position, and the end face of the outer tube 30 points to the starting mark of the numerical scale, which corresponds to zero. When the first suture is tightened and the slide tube 40 is pulled to slide, the scale segment 403 slides towards the end of the outer tube 30, and the numerical scale moves synchronously. The scale value pointed to by the end face of the outer tube 30 changes accordingly. The surgeon can directly know the tension value of the first suture by reading the scale value aligned with the end face or the reading mark, without the need for conversion or table lookup.

[0044] By setting numerical scales and directly labeling Newton values, surgeons can directly read suture tension values, simplifying the operation process, reducing the risk of misreading, and improving surgical efficiency and safety.

[0045] In some embodiments of the present invention, the anchor 1 includes a nail head 10 and an anchor 11. The nail head 10 is disposed at the head end of the drive assembly 2, and has a pointed tip and a tail end. The pointed tip faces outward for insertion into a bone hole, and the tail end faces the drive assembly 2. A first suture hole 100 and a second suture hole 101 are provided at intervals on the nail head 10. The first suture hole 100 is disposed near the pointed tip and penetrates both side walls of the nail head 10 for a first suture connected to soft tissue to pass through. The second suture hole 101 is disposed near the tail end and penetrates both side walls of the nail head 10 for a second suture 9 temporarily fixing the nail head 10 to pass through. The edges of both the first suture hole 100 and the second suture hole 101 are rounded to prevent the suture from being cut or abraded by the sharp edges of the holes when passing through them. The anchor 11 has an axially penetrating first central hole. The anchor 11 is sleeved on the drive assembly 2 and located at the tail of the nail head 10. The outer wall of the anchor 11 is provided with external threads, which are used to screw into the bone hole to fix the anchor 11 in the bone tissue.

[0046] The drive assembly 2 includes a positioning rod 20, a push rod 21, and a threaded rod 22. The positioning rod 20 extends axially and passes through the first central hole of the anchor 11. The head end of the positioning rod 20 is hexagonal prism-shaped, meaning the hexagonal prism at the head end of the positioning rod 20 has six side planes, with adjacent side planes connected by a rounded transition. The first central hole of the anchor 11 is a hexagonal prism hole that matches the head end of the positioning rod 20. The head end of the positioning rod 20 is inserted into the first central hole of the anchor 11, transmitting torque through the fit between the hexagonal prism face and the hexagonal prism hole. The head end of the positioning rod 20 extends out of the anchor 11 and towards the tail end of the nail head 10. The positioning rod 20 has a second central hole that extends axially. The second thread 9 passes through the second thread hole 101 and then through the second central hole, exiting from the tail end of the threaded rod 22 and being fixed to the threaded rod 22. The threaded rod 22 is fixedly connected to the positioning rod 20; the two can be an integrally formed structure or fixedly connected by welding. The push rod 21 is fitted onto the outside of the threaded rod 22. The inner wall of the push rod 21 is provided with internal threads, and the outer wall of the threaded rod 22 is provided with external threads. The push rod 21 and the threaded rod 22 are connected by a threaded engagement.

[0047] The neck of the threaded rod 22 has a groove 220, which is an annular groove extending circumferentially along the threaded rod 22. A handle 221 is located on the threaded rod 22 near the groove 220, allowing the surgeon to grip and rotate the threaded rod 22. The handle 221 has a flat, block-like structure, with a flat rectangular or elliptical cross-section perpendicular to the axial direction of the threaded rod 22, enabling the surgeon to firmly grip and apply rotational torque. The handle 221 has a suture groove 2210 for securing and fixing the second suture 9. The suture groove 2210 is X-shaped, consisting of two intersecting channels. The two branch ends of the X-shaped suture groove 2210 near the push rod 21 have openings for winding the second suture 9 into the corresponding branch channels. After passing through the second thread hole 101, the second thread 9 enters the second central hole of the positioning rod 20 and extends towards the tail end along the second central hole. After exiting through the tail end of the threaded rod 22, it wraps around the groove 220 in the neck of the threaded rod 22, and then extends through the surface of the threaded rod 22 to the thread-holding groove 2210, where the thread-holding groove 2210 clamps and fixes the second thread 9. By fixing the second thread 9 at the groove 220 and the thread-holding groove 2210, the nail head 10 is pulled taut by the second thread 9 and constrained to the head end of the positioning rod 20, realizing a detachable connection between the nail head 10 and the drive assembly 2.

[0048] During the surgery, the first suture connected to the soft tissue is first passed through the first suture hole 100. The second suture 9 is then passed through the second suture hole 101 and enters the second central hole of the positioning rod 20. It then passes through the tail of the positioning rod 20, wraps around the groove 220, and is secured in the suture groove 2210, thus fixing the pin head 10 to the head end of the positioning rod 20. The assembled inserter head, i.e., one end of the pin head 10, is then inserted into the pre-drilled bone hole, ensuring that the pin head 10 is completely submerged. Subsequently, the first suture is tightened through the suture wrapping part 6, and the tension is measured. Once the tension is confirmed to be correct, the fixation of the second suture 9 at the suture groove 2210 is released, and the second suture 9 is pulled out of the positioning rod 20. At this point, the constraint between the pin head 10 and the drive assembly 2 is released. The surgeon rotates the threaded rod 22, which drives the fixed positioning rod 20 to rotate synchronously. The positioning rod 20 transmits rotational torque to the anchor 11 through the hexagonal prism at its head end engaging with the hexagonal hole in the first central hole of the anchor 11, causing the anchor 11 to rotate synchronously. Simultaneously, the push rod 21 moves along the axial direction of the threaded rod 22 towards the nail head 10 under the action of the threaded engagement. The push rod 21 pushes the anchor 11 forward, and the anchor 11 is screwed into the bone hole under the combined action of rotation and pushing. During the screwing-in process, the anchor 11 is pushed deeper into the bone hole, pushing the nail head 10 to move synchronously into the bone hole. The first suture is pressed against the inner wall of the bone hole by the anchor 11 and fixed. After implantation, the rest of the inserter is removed as a whole, leaving only the nail head 10 and the anchor 11 inside the bone.

[0049] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A screw-in, knot-free anchor inserter, characterized in that, include: The inserter body includes an anchor and a drive assembly. The anchor is disposed at the head end of the drive assembly and is used to screw into the bone after the first suture is tightened and to squeeze and fix the first suture to the bone wall. The drive assembly is used to drive the anchor to rotate so that it screws into the bone. A tension measuring mechanism is disposed on the inserter body. The tension measuring mechanism includes a fixed member, a movable member, and a first elastic member. The fixed member is fixedly connected to the drive assembly. The movable member is movably connected to the fixed member and can slide axially relative to the fixed member. The first elastic member is disposed between the fixed member and the movable member. The movable member is provided with a winding part and an indicator part. The winding part is used for winding the first suture. When the first suture is tightened by the winding part, it pulls the movable member to move and compresses the first elastic member. The indicator part outputs a readable value corresponding to the tension of the first suture as the movable member slides.

2. The screw-in knotless anchor inserter according to claim 1, characterized in that, The fixing member includes an outer tube, the movable member includes a slide tube, and the first elastic member includes a first spring; The outer tube is fixedly sleeved on the drive assembly, and the sliding tube is sleeved inside the outer tube. The first spring is disposed between the outer tube and the sliding tube, and its two ends abut against the outer tube and the sliding tube respectively. The sliding tube compresses the first spring under the pulling action when the first suture is tightened. The sliding displacement of the sliding tube relative to the outer tube is converted into the tension reading of the first suture through the indicator.

3. The screw-in knotless anchor inserter according to claim 2, characterized in that, A sliding guide structure is provided between the slide tube and the outer tube. The sliding guide structure includes a pin and a groove. The pin is fixed on one of the slide tube and the outer tube, and the groove is formed on the other of the slide tube and the outer tube. The pin is embedded in the groove and can slide along the groove.

4. The screw-in knotless anchor inserter according to claim 2, characterized in that, The slide tube includes an installation section, and the winding section includes a ratchet bar. The ratchet bar is rotatably mounted on the slide tube. The installation section has an installation hole through which the ratchet bar passes. The ratchet bar passes through the installation hole. The ratchet bar has a winding groove for the first sewing thread to be wound.

5. The screw-in knotless anchor inserter according to claim 4, characterized in that, The mounting section has two opposing support walls and a connecting wall between the two support walls. The two support walls are respectively provided with mounting holes. The ratchet rod passes through the two mounting holes. A knob is fixedly provided at one end of the ratchet rod, and a tail cap is fixedly provided at the other end of the ratchet rod. The knob and the tail cap are respectively located on opposite sides of the two support walls.

6. The screw-in knotless anchor inserter according to claim 5, characterized in that, A limiting component is provided on one side of the ratchet lever. The limiting component includes a limiting block and a second elastic element. An assembly hole is provided on one of the support walls. One end of the second elastic element is installed in the assembly hole. The limiting block includes a limiting part and a pressing part. The other end of the second elastic element abuts against the pressing part. The limiting part has an abutting surface. The abutting surface abuts against the ratchet to restrict the ratchet lever from rotating in the opposite direction.

7. The screw-in knotless anchor inserter according to claim 4, characterized in that, The slide tube further includes a scale section, which is fixedly connected to the mounting section. The indicator is a numerical scale set on the scale section, and the numerical scale is arranged along the axial direction of the scale section and its scale value directly corresponds to the Newton value of the first suture tension.

8. The screw-in knotless anchor inserter according to any one of claims 1 to 7, characterized in that, The anchor includes a nail head and an anchor. The nail head is disposed at the head end of the drive assembly and is detachably connected to the drive assembly via a second suture passing through the nail head. The anchor is sleeved on the drive assembly and located at the tail end of the nail head. The outer wall of the anchor has external threads for screwing into the bone.

9. The screw-in knotless anchor inserter according to claim 8, characterized in that, The nail head has a pointed end and a tail end. The nail head has a first thread hole and a second thread hole. The first thread hole is located near the pointed end and extends through both sides of the nail head for the first suture connected to soft tissue to pass through. The second thread hole is located near the tail end and extends through both sides of the nail head for the second suture temporarily fixing the nail head to pass through.

10. The screw-in knotless anchor inserter according to claim 9, characterized in that, The drive assembly includes a positioning rod, a push rod, and a threaded rod. The positioning rod passes through the anchor and its head is connected to the nail head via the second thread. The threaded rod is fixedly connected to the positioning rod. The push rod is fitted onto the outside of the threaded rod, and the two are threaded together. The neck of the threaded rod has a groove, and the tail of the threaded rod has a thread-holding groove. The groove is used for the second thread, which passes through the second thread hole and is led out through the positioning rod, to be wound around. The thread-holding groove is used to hold the second thread tightly.

Images