Distributed rear fork stop point positioner

Abstract

The utility model provides a distributed rear fork stop point positioner which comprises a rod penetrating seat, a positioning rod and a supporting rod, the rod penetrating seat comprises a rod sleeve and a handle part extending from the side wall of the rod sleeve to one side, the positioning rod is movably connected with the rod sleeve, the supporting rod is connected to the handle part, a plurality of guide holes are formed in the positioning rod in the axial direction of the positioning rod, a plurality of blade-shaped positioning grooves are formed in the rod wall of the positioning rod, and the blade-shaped positioning grooves are communicated with the positioning rod. The inner side wall of the rod sleeve is elastically connected with blade-shaped positioning teeth; the blade-shaped positioning grooves are annular grooves surrounding the positioning rod, the multiple blade-shaped positioning grooves are evenly distributed in the circumferential direction of the positioning rod, and the blade-shaped positioning teeth are matched with the blade-shaped positioning grooves in a clamped mode; a plurality of spherical positioning grooves are further formed in the side wall of the positioning rod, extend in the axial direction of the positioning rod and are evenly distributed in the circumferential direction of the positioning rod, and spherical positioning teeth are elastically connected to the inner side wall of the rod sleeve and matched with the spherical positioning grooves in a clamped mode. The device not only is suitable for the sewing requirement of a single wire harness, but also can meet the sewing requirement of a plurality of wire harnesses, and can meet the requirement of different thicknesses of the wire harnesses.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a distributed rear fork stop positioner. Background Technology

[0002] Cruciate ligament (ACL) injury is a common knee injury requiring ACL reconstruction surgery. The surgery utilizes an ACL insertion locator, currently used in conjunction with a rod holder, a positioning rod, and a support rod. These devices have the following problems: 1) The positioning rod of the current ACL insertion locator only has one guide hole, allowing only one hole to be drilled in the tibia at a time. However, some injuries require multiple sutures, necessitating multiple holes in the tibia for suture insertion. This necessitates repeated adjustments to the ACL insertion locator to drill multiple holes, which is inconvenient. 2) With advancements in surgical techniques, the thickness of the sutures used in ligament reconstruction varies depending on the injury, corresponding to different hole diameters in the tibia, to reduce surgical trauma. However, the guide hole diameter on the positioning rod of the current ACL insertion locator is fixed, making it impossible to drill holes of the appropriate diameter in the tibia based on the injury, which needs improvement. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model provides a distributed rear fork stop position positioner.

[0004] The technical solution of this utility model is as follows:

[0005] A distributed rear fork stop positioner includes a rod holder, a positioning rod, and a support rod. The rod holder includes a rod sleeve and a handle extending from the side wall of the rod sleeve to one side. The positioning rod is movably connected to the rod sleeve, and the support rod is connected to the handle. The positioning rod has multiple guide holes along its axial direction, and the rod wall of the positioning rod has multiple blade-shaped positioning grooves. The inner side wall of the rod sleeve is elastically connected with blade-shaped positioning teeth.

[0006] The blade-shaped positioning groove is an annular groove surrounding the positioning rod. Multiple blade-shaped positioning grooves are evenly distributed along the circumference of the positioning rod, and the blade-shaped positioning teeth are engaged with the blade-shaped positioning grooves.

[0007] The side wall of the positioning rod is also provided with multiple spherical positioning grooves that extend along the axial direction of the positioning rod and are evenly distributed along the circumference of the positioning rod. The inner side wall of the rod sleeve is elastically connected with spherical positioning teeth that engage with the spherical positioning grooves.

[0008] By setting multiple guide holes on the positioning rod, multiple holes can be drilled in the tibia during a single positioning operation, meeting the need for multiple suture bundles and making the distributed rear fork stop positioner more widely applicable.

[0009] Preferably, the multiple guide holes have different diameters to meet the needs of using different thicknesses of sutures during surgery.

[0010] One of the multiple guide holes is located on the axis of the positioning rod, while the rest are distributed around the guide hole.

[0011] Preferably, the guide holes not located on the axis of the positioning rod are evenly distributed around the guide holes located on the axis of the positioning rod.

[0012] Preferably, the number of spherical positioning grooves is the same as the number of guide holes not on the axis of the positioning rod, so that the spherical positioning grooves and the guide holes not on the axis of the positioning rod form a one-to-one relationship. When a guide hole of a certain diameter is required, the guide hole can be quickly positioned to the required position by rotating the positioning rod.

[0013] To prevent the spherical positioning teeth and the blade-shaped positioning teeth from coming off the inner wall of the sleeve, a limiting tube is embedded in the inner hole of the sleeve. The limiting tube is provided with limiting holes corresponding to the positions of the spherical positioning teeth and the blade-shaped positioning teeth. The limiting holes are designed to allow the spherical positioning teeth and the blade-shaped positioning teeth to partially extend into the limiting tube.

[0014] Furthermore, a step is provided at one end of the inner hole of the rod sleeve, and one end of the limiting tube abuts against the step to locate the installation position of the limiting tube.

[0015] In one embodiment, the support rod has an arc-shaped segment, and the handle has an arc-shaped groove. The arc-shaped segment is slidably connected within the arc-shaped groove, and the handle also has a locking bolt, configured to lock the position of the arc-shaped segment within the arc-shaped groove. The tilt direction of the positioning rod is adjusted by adjusting the position of the arc-shaped segment within the arc-shaped groove.

[0016] Preferably, the radial cross-section of the arc-shaped groove is trapezoidal, gradually narrowing from the bottom to the opening. The shape of the arc segment matches the arc-shaped groove, and the locking bolts are installed on the bottom of the groove with their screw-in direction facing the opening. The trapezoidal cross-section prevents the arc segment from slipping out of the groove opening, allowing it to slide only along the extension direction of the arc-shaped groove. Simultaneously, the locking bolts press the two inclined sidewalls of the arc segment against the two inclined sidewalls of the arc-shaped groove, locking the position of the arc segment.

[0017] Furthermore, an arc-shaped limiting groove is provided on the side of the arc segment facing the bottom of the arc-shaped slide groove. The arc-shaped limiting groove is concentric with the arc-shaped slide groove, and the screw of the locking bolt can extend into the arc-shaped limiting groove to restrict the arc segment from sliding out of the arc-shaped slide groove.

[0018] The distributed rear fork stop positioner provided by this utility model has the following beneficial effects:

[0019] 1. By setting multiple guide holes on the positioning rod, doctors can choose to drill one or more holes in the tibia during a single positioning, depending on the actual situation. This not only meets the needs of single-thread suture but also the needs of multi-thread suture, making it more widely applicable.

[0020] 2. It allows for multiple holes to be drilled in one location, simplifying the surgical procedure and improving surgical efficiency.

[0021] 3. Multiple guide holes of different diameters are used, which not only allows for drilling multiple holes but also enables drilling holes of different diameters to meet the needs of wire harnesses with varying thicknesses. Furthermore, by rotating the positioning rod, holes of the required diameter can be drilled at the desired location according to the actual situation. Attached Figure Description

[0022] In the attached diagram:

[0023] Figure 1 A schematic diagram of a distributed rear fork stop positioner;

[0024] Figure 2 Another perspective diagram of a distributed rear fork stop positioner;

[0025] Figure 3 A cross-sectional schematic diagram of a distributed rear fork stop positioner;

[0026] Figure 4 This is a cross-sectional view of the arc-shaped groove section of the distributed rear fork stop positioner.

[0027] The components represented by the various reference numerals in the diagram are:

[0028] 1. Through-rod seat; 11. Rod sleeve; 111. Receiving groove; 112. Step; 12. Handle; 121. Arc-shaped sliding groove; 13. Locking bolt; 14. Blade-shaped positioning tooth; 15. Spherical positioning tooth; 16. Limiting tube; 161. Limiting hole; 17. Elastic washer; 2. Positioning rod; 21. Guide hole; 22. Blade-shaped positioning groove; 23. Spherical positioning groove; 3. Support rod; 31. Arc-shaped section; 311. Arc-shaped limiting groove; 32. Positioning section. Detailed Implementation

[0029] like Figure 1 and Figure 2As shown, this utility model embodiment provides a distributed rear fork stop positioner, including a rod holder 1, a positioning rod 2, and a support rod 3. The rod holder 1 includes a rod sleeve 11 and a handle 12 extending to one side from the side wall of the rod sleeve 11. The positioning rod 2 is movably connected to the rod sleeve 11, specifically inserted into the rod sleeve 11, and can slide axially and rotate circumferentially. The support rod 3 is connected to the handle 12 and includes an arc-shaped segment 31 and a positioning segment 32 extending from one end of the arc-shaped segment 31. The end of the positioning segment 32 is located at the center of the arc-shaped segment 31 and on the axis of the positioning rod 2. The handle 12 is provided with an arc-shaped groove 121, and the arc-shaped segment 31 is slidably connected in the arc-shaped groove 121. The handle 12 is also provided with a locking bolt 13, which is configured to lock the position of the arc-shaped segment 31 in the arc-shaped groove 121. The positioning segment 32 gradually narrows in cross-section from the arc end to the end end. The end of the positioning segment 32 is provided with a hook to hook the tibia and cooperate with the positioning rod 2 for positioning.

[0030] Please refer to Figure 1 and Figure 3 As shown, in this utility model, the end of the positioning rod 2 near the end of the positioning section 32 of the support rod 3 tapers to form a frustum shape. Multiple guide holes 21 are provided on the positioning rod 2 along its axial direction.

[0031] In this embodiment, multiple guide holes 21 are arranged such that one is located on the axis of the positioning rod 2, and the rest are arranged around the guide hole 21.

[0032] Among them, the guide holes 21 that are not on the axis of the positioning rod 2 are evenly distributed around the guide holes 21 that are on the axis of the positioning rod 2.

[0033] Furthermore, the multiple guide holes 21 have different diameters to meet the needs of using different thicknesses of sutures during surgery.

[0034] This invention, by providing multiple guide holes 21 on the positioning post, allows doctors to select one or more holes to be drilled on the tibia during a single positioning operation, depending on the actual situation. This not only meets the needs of single-strand suture but also the needs of multi-strand suture, thus broadening its applicability. Furthermore, the multiple guide holes 21 employ different diameters, allowing for the drilling of multiple holes as well as holes of different diameters to accommodate different thicknesses of sutures.

[0035] The positioning rod 2 has multiple blade-shaped positioning grooves 22 on its rod wall, and blade-shaped positioning teeth 14 are elastically connected to the inner side wall of the rod sleeve 11. The blade-shaped positioning grooves 22 are annular grooves surrounding the positioning rod 2, and the multiple blade-shaped positioning grooves 22 are evenly distributed around the circumference of the positioning rod 2. The blade-shaped positioning teeth 14 engage with the blade-shaped positioning grooves 22, thereby precisely controlling the axial advance of the positioning rod 2.

[0036] Specifically, the cross-section of the blade-shaped positioning groove 22 is triangular, and the engaging part of the blade-shaped positioning tooth 14 is a double-beveled blade shape that mates with the blade-shaped positioning groove 22.

[0037] The side wall of the positioning rod 2 is also provided with multiple spherical positioning grooves 23, which extend along the axial direction of the positioning rod 2 and are evenly distributed along the circumference of the positioning rod 2. The inner side wall of the rod sleeve 11 is elastically connected with spherical positioning teeth 15, which engage with the spherical positioning grooves 23 to position the rotation position of the positioning rod 2, and adjust the corresponding position of the guide hole 21 on the tibia by rotating.

[0038] Specifically, such as Figure 3 As shown, the inner wall of the sleeve 11 is provided with grooves 111 corresponding to the positions of the spherical positioning teeth 15 and the blade-shaped positioning teeth 14. The spherical positioning teeth 15 and the blade-shaped positioning teeth 14 are slidably located in the grooves 111, and elastic washers 17 are provided between them and the bottom wall of the grooves 111. Preferably, the groove 111 corresponding to the blade-shaped positioning teeth 14 is a rectangular groove, and the part of the blade-shaped positioning teeth 14 away from its engaging part is rectangular, which slides in fit with the rectangular grooves 111 to prevent the blade-shaped positioning teeth 14 from rotating, so that the blade-shaped positioning teeth 14 can be well engaged with the blade-shaped positioning grooves 22.

[0039] Multiple spherical positioning teeth 15 and blade-shaped positioning teeth 14 can be provided, and they are evenly distributed around the circumference of the sleeve 11 to provide a balanced clamping force on the positioning rod 2.

[0040] In addition, there may be two sets of spherical positioning teeth 15 and blade-shaped positioning teeth 14, each set including spherical positioning teeth 15 and blade-shaped positioning teeth 14, with the two sets located near the two ends of the sleeve 11 respectively.

[0041] The number of spherical positioning teeth 15 is less than or equal to the number of spherical positioning grooves 23. The number of spherical positioning grooves 23 is preferably the same as the number of guide holes 21 that are not on the axis of the positioning rod 2, so that the spherical positioning grooves 23 and the guide holes 21 that are not on the axis of the positioning rod 2 form a one-to-one relationship. When a guide hole 21 of a certain diameter is required, the guide hole 21 can be quickly positioned to the required position by rotating the positioning rod 2.

[0042] In addition, to prevent the spherical positioning teeth 15 and the blade-shaped positioning teeth 14 from dislodging from the inner wall of the sleeve 11, a limiting tube 16 is embedded in the inner hole of the sleeve 11. The limiting tube 16 blocks the spherical positioning teeth 15 and the blade-shaped positioning teeth 14 within the receiving groove 111. The limiting tube 16 is provided with limiting holes 161 corresponding to the positions of the spherical positioning teeth 15 and the blade-shaped positioning teeth 14. The size of the limiting holes 161 is set so that only a portion of the spherical positioning teeth 15 and the blade-shaped positioning teeth 14 can extend into the limiting tube 16 and engage with the spherical positioning groove 23 and the blade-shaped positioning groove 22 respectively. This achieves the engaging effect while preventing the spherical positioning teeth 15 and the blade-shaped positioning teeth 14 from completely dislodging from the receiving groove 111.

[0043] To facilitate the installation and positioning of the limiting tube 16, a step 112 is provided at one end of the inner hole of the sleeve 11, and one end of the limiting tube 16 abuts against the step 112. When the limiting tube 16 is installed, when the limiting tube 16 is blocked by the step 112, it indicates that the limiting tube 16 has been installed in place, and the limiting hole 161 coincides with the corresponding spherical positioning tooth 15 and blade-shaped positioning tooth 14, thereby positioning the installation position of the limiting tube 16.

[0044] For example Figure 2 and Figure 3 As shown, an arc-shaped groove 121 is formed on one side of the handle 12, extends along the extension direction of the handle 12, and passes through the extension end of the handle 12. The arc-shaped segment 31 on the support rod 3 slides into the arc-shaped groove 121 from the end of the arc-shaped groove 121. By adjusting the position of the arc-shaped segment 31 in the arc-shaped groove 121, the tilt direction of the positioning rod 2 is adjusted.

[0045] For example Figure 4 As shown, the radial cross-section of the arc-shaped groove 121 is trapezoidal and gradually narrows from the bottom to the opening. The shape of the arc-shaped segment 31 matches the arc-shaped groove 121. The locking bolt 13 is installed on the bottom of the groove, and its screwing direction is towards the opening. The trapezoidal cross-section prevents the arc-shaped segment 31 from coming out of the opening of the arc-shaped groove 121, allowing it to slide only along the extension direction of the arc-shaped groove 121. At the same time, the locking bolt 13 can press the two inclined sidewalls of the arc-shaped segment 31 against the two inclined sidewalls of the arc-shaped groove 121, locking the position of the arc-shaped segment 31.

[0046] Furthermore, an arc-shaped limiting groove 311 is provided on the side of the arc-shaped segment 31 facing the bottom of the arc-shaped slide groove 121. The arc-shaped limiting groove 311 is concentric with the arc-shaped slide groove 121. The screw of the locking bolt 13 can extend into the arc-shaped limiting groove 311. When the arc-shaped segment 31 slides, the screw of the locking bolt 13 can form a limiting relationship with the two ends of the arc-shaped limiting groove 311, thereby preventing the arc-shaped segment 31 from sliding out of the arc-shaped slide groove 121. In addition, the screw of the locking bolt 13 presses against the bottom of the arc-shaped limiting groove 311 to apply a compressive force to the arc-shaped segment 31, thereby locking the position of the arc-shaped segment 31.

Claims

1. A distributed rear fork stop position positioner, comprising a rod holder (1), a positioning rod (2), and a support rod (3), wherein the rod holder (1) comprises a rod sleeve (11) and a handle (12) extending to one side from the side wall of the rod sleeve (11), the positioning rod (2) is movably connected to the rod sleeve (11), and the support rod (3) is connected to the handle (12), characterized in that, The positioning rod (2) has multiple guide holes (21) along its axial direction, and the rod wall of the positioning rod (2) has multiple blade-shaped positioning grooves (22). The inner side wall of the rod sleeve (11) is elastically connected with blade-shaped positioning teeth (14). The blade-shaped positioning groove (22) is an annular groove surrounding the positioning rod (2). Multiple blade-shaped positioning grooves (22) are evenly distributed around the positioning rod (2). The blade-shaped positioning teeth (14) are engaged with the blade-shaped positioning grooves (22). The side wall of the positioning rod (2) is also provided with a plurality of spherical positioning grooves (23), which extend along the axial direction of the positioning rod (2) and are evenly distributed along the circumference of the positioning rod (2). The inner side wall of the rod sleeve (11) is elastically connected with spherical positioning teeth (15), which engage with the spherical positioning grooves (23).

2. A distributed rear fork stop position locator as described in claim 1, characterized in that, The multiple guide holes (21) have different diameters.

3. A distributed rear fork stop position locator as described in claim 2, characterized in that, One of the plurality of guide holes (21) is located on the axis of the positioning rod (2), and the rest are distributed around the guide hole (21).

4. A distributed rear fork stop position locator as described in claim 3, characterized in that, The guide holes (21) not on the axis of the positioning rod (2) are evenly distributed around the guide holes (21) on the axis of the positioning rod (2).

5. A distributed rear fork stop positioner as described in claim 4, characterized in that, The number of spherical positioning grooves (23) is the same as the number of guide holes (21) not on the axis of the positioning rod (2).

6. A distributed rear fork stop position locator as described in claim 1, characterized in that, The inner hole of the sleeve (11) is fitted with a limiting tube (16). The limiting tube (16) is provided with limiting holes (161) at the positions corresponding to the spherical positioning teeth (15) and the blade-shaped positioning teeth (14). The limiting holes (161) are configured to allow the spherical positioning teeth (15) and the blade-shaped positioning teeth (14) to partially extend into the limiting tube (16).

7. A distributed rear fork stop position locator as described in claim 6, characterized in that, One end of the inner hole of the sleeve (11) is provided with a step (112), and one end of the limiting tube (16) abuts against the step (112).

8. A distributed rear fork stop position locator as described in claim 1, characterized in that, The support rod (3) is provided with an arc-shaped section (31), and the handle (12) is provided with an arc-shaped groove (121). The arc-shaped section (31) is slidably connected in the arc-shaped groove (121). The handle (12) is also provided with a locking bolt (13), which is configured to lock the position of the arc-shaped section (31) in the arc-shaped groove (121).

9. A distributed rear fork stop position locator as described in claim 8, characterized in that, The radial section of the arc-shaped groove (121) is trapezoidal and gradually narrows from the bottom to the opening. The shape of the arc-shaped segment (31) matches the arc-shaped groove (121). The locking bolt (13) is installed on the bottom of the groove and is screwed in towards the opening.

10. A distributed rear fork stop position locator as described in claim 9, characterized in that, The arc-shaped segment (31) has an arc-shaped limiting groove (311) on the side facing the bottom of the arc-shaped slide groove (121). The arc-shaped limiting groove (311) is concentric with the arc-shaped slide groove (121), and the screw of the locking bolt (13) can extend into the arc-shaped limiting groove (311).

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