Surgical reference frame omnidirectional connection securement device

Abstract

This utility model belongs to the field of surgical reference frame technology and discloses a omnidirectional connection and fastening device for a surgical reference frame. A hinge ball connects to a bone needle, one end of a locking screw is hinged to the hinge ball, a clamping block is fitted onto the locking screw, the reference frame is rotatably connected to the clamping block, and a locking nut is screwed to the other end of the locking screw and fixes the clamping block. The omnidirectional adjustment of the reference frame is achieved by setting three rotational degrees of freedom. The locking screw is also fitted with a toothed slider, one side of which has a ball socket. The hinge ball is rotatably positioned in the ball socket. The hinge ball has an arc-shaped external toothed ring, and the ball socket has an arc-shaped internal toothed ring that meshes with the arc-shaped external toothed ring to prevent the toothed slider from causing the locking screw to rotate relative to the hinge ball. A first toothed ring is located on the side of the toothed slider away from the ball socket, and a second toothed ring that meshes with the first toothed ring on the clamping block to prevent the clamping block from rotating relative to the toothed slider. This effectively prevents the reference frame from loosening and ensures its stability.

Description

Technical Field

[0001] This utility model relates to the field of surgical reference frame technology, and in particular to a omnidirectional connection and fastening device for a surgical reference frame. Background Technology

[0002] A medical positioning reference device is a device or marker used in the medical field, especially in image-guided surgery and radiotherapy. Its main function is to provide surgeons with a precise coordinate system to accurately locate lesions or tumors, thereby improving treatment accuracy and effectiveness. A medical positioning reference device includes a surgical reference frame, which helps surgeons precisely locate the surgical site by providing a stable three-dimensional coordinate system. The surgical reference frame typically includes a frame clamp, bone pins, and a frame body equipped with anti-splash reflectors. Bone pins are inserted into the femoral and tibial shafts and mounted on the frame clamp. NDI (visual detection) captures the anti-splash reflectors, thus providing a stable three-dimensional coordinate system for surgical navigation.

[0003] However, in existing surgical reference frames, the reference frame clamps and the reference frame body usually only have two rotational degrees of freedom. Some surgical reference frames have three rotational degrees of freedom, but because of the excessive rotation, the reference frame body and the reference frame clamps are prone to loosening, causing instability of the three-dimensional coordinate system during the operation and resulting in instrument interference and other phenomena. Utility Model Content

[0004] The purpose of this invention is to provide a surgical reference frame omnidirectional connection and fastening device, which can realize omnidirectional adjustment of the reference frame, while also preventing the reference frame from loosening and ensuring the stability of the reference frame.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A surgical reference frame omnidirectional connection and fastening device includes:

[0007] Reference frame;

[0008] The clamp structure includes a hinge ball, a locking screw, a clamping block, and a locking nut. The hinge ball is connected to a bone needle. One end of the locking screw is hinged to the hinge ball. The clamping block is sleeved on the locking screw. The reference frame is rotatably connected to the clamping block. The locking nut is screwed to the other end of the locking screw and fixes the clamping block.

[0009] The fastening structure includes a toothed slider, a first fastening unit, and a second fastening unit. The toothed slider is sleeved on the locking screw. A ball socket is provided on one side of the toothed slider. The hinge ball is rotatably disposed in the ball socket. The first fastening unit includes an arc-shaped external toothed ring disposed on the hinge ball and an arc-shaped internal toothed ring disposed on the ball socket that meshes with the arc-shaped external toothed ring. The second fastening unit includes a first toothed ring disposed on the side of the toothed slider away from the ball socket and a second toothed ring disposed on the clamping block that meshes with the first toothed ring.

[0010] Preferably, the clamping block is provided with a clamping hole with an adjustable diameter, and the plug rod of the reference frame is rotatably disposed in the clamping hole and can be locked in the clamping hole.

[0011] Preferably, the clamping block includes a first clamping arm and a second clamping arm arranged in parallel opposite directions. One end of the first clamping arm is connected to one end of the second clamping arm, and the clamping hole is formed at the end where the first clamping arm and the second clamping arm are connected. The other end of the first clamping arm is provided with a first through hole, and the other end of the second clamping arm is provided with a second through hole. The locking screw passes through the first through hole and the second through hole, and the locking nut is configured to shorten the distance between the first clamping arm and the second clamping arm and reduce the diameter of the clamping hole to lock the plug rod.

[0012] Preferably, the hinge ball has a hinge groove, one end of the locking screw extends into the hinge groove and has a hinge hole, the hinge shaft passes through the hinge groove and is disposed in the hinge hole, and the axial direction of the hinge shaft is perpendicular to the hinge direction of the locking screw.

[0013] Preferably, a first spring is sleeved on the outer wall of the locking screw, and one end of the first spring abuts against the toothed slider, while the other end passes through the clamping hole and abuts against the locking nut.

[0014] Preferably, the articulated ball is connected to the connecting rod, and a clamping block is connected to the end of the connecting rod away from the articulated ball. The side wall of the clamping block is provided with a through hole, and the bone needle is inserted and locked in the through hole.

[0015] Preferably, the clamping block also includes a threaded clamping block and a tensioning screw. One end of the clamping block is provided with a locking hole, and the opposite end is provided with a locking cavity that connects the locking hole and the through hole. The clamping block is slidably disposed in the locking cavity. The axial direction of the bone needle intersects with the sliding direction of the clamping block. One end of the tensioning screw extends into the locking hole and is screwed to the clamping block to drive the clamping block to slide and press against the bone needle.

[0016] Preferably, the end of the pressure block that extends into the locking cavity is provided with an inclined wall, and the distance between the inclined wall and the cavity wall of the adjacent locking cavity gradually shortens in the direction away from the locking hole.

[0017] Preferably, a limiting pin is inserted into the clamping block, and an annular groove is provided at the end of the tensioning screw away from the pressure block, with the limiting pin rotatably disposed in the annular groove.

[0018] Preferably, a second spring is fitted on the tensioning screw, and a limiting step is provided on the outer wall of the tensioning screw, with the second spring abutting against the limiting step between the pressure block.

[0019] The beneficial effects of this utility model are:

[0020] This utility model provides a 360-degree connection and fastening device for a surgical reference frame, comprising a reference frame, a clamping structure, and a fastening structure. The reference frame has several anti-splash reflective balls spaced apart. The clamping structure includes a hinged ball, a locking screw, a clamping block, and a locking nut. The hinged ball connects to a bone pin. One end of the locking screw is hinged to the hinged ball. The clamping block is fitted onto the outer wall of the locking screw. The reference frame is rotatably connected to the clamping block. The locking nut is screwed onto the other end of the locking screw, applying pressure to the clamping block during the screwing process to fix it. The reference frame can rotate relative to the clamping block. The clamping block can drive the reference frame to rotate about the axis of the locking screw. The locking screw can drive the clamping block and the reference frame on it to rotate relative to the hinged ball, thereby achieving 360-degree adjustment of the reference frame. The fastening structure includes a toothed slider, a first fastening unit, and a second fastening unit. The toothed slider is fitted onto the outer wall of the locking screw, and the toothed slider is positioned relative to the clamping block... Closer to the hinge joint, a ball socket is provided on one side of the toothed slider. The hinge ball is rotatably positioned in the ball socket. The first fastening unit includes an arc-shaped external gear ring and an arc-shaped internal gear ring. The arc-shaped external gear ring is positioned on the hinge ball, and the arc-shaped internal gear ring is positioned on the ball socket. The arc-shaped external gear ring meshes with the arc-shaped internal gear ring. When the hinge ball is pressed against the ball socket, it can prevent the hinge ball from rotating in the ball socket due to impact or its own weight, thereby preventing the toothed slider from driving the locking screw to rotate relative to the hinge ball. The second fastening unit includes a first gear ring and a second gear ring. The first gear ring is positioned on the side of the toothed slider away from the ball socket, and the second gear ring is positioned on the side of the clamping block. The first gear ring meshes with the second gear ring. When the hinge ball is pressed against the ball socket, it prevents the clamping block from rotating relative to the toothed slider, thereby preventing the clamping block from driving the reference frame to rotate. This further prevents the reference frame from loosening, ensures the stability of the reference frame, and ensures the stability of the constructed three-dimensional coordinate system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the omnidirectional connection and fastening device for the surgical reference frame provided in this embodiment of the utility model;

[0022] Figure 2 This is an exploded view of the omnidirectional connection and fastening device for the surgical reference frame provided in this embodiment of the utility model;

[0023] Figure 3 This is a partial structural schematic diagram of the omnidirectional connection and fastening device for the surgical reference frame provided in this embodiment of the utility model;

[0024] Figure 4 This is an assembly diagram of the articulated ball, connecting rod, and clamping block provided in an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the toothed slider provided in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the clamping block provided in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the pressure block provided in this embodiment of the utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the reference frame provided in an embodiment of this utility model.

[0029] In the picture:

[0030] 10. Bone needle; 1. Reference frame; 11. Anti-splash reflector ball; 12. Insert rod; 21. Hinge ball; 211. Hinge groove; 22. Locking screw; 23. Clamping block; 230. Clamping hole; 231. First clamping arm; 232. Second clamping arm; 24. Locking nut; 25. Hinge shaft; 26. First spring; 31. Toothed slider; 32. Arc-shaped external gear ring; 33. First gear ring; 34. Second gear ring; 4. Connecting rod; 5. Clamping block; 51. Through hole; 52. Locking hole; 53. Locking cavity; 6. Pressure block; 61. Inclined wall; 7. Tensioning screw; 8. Second spring; 9. Limiting pin. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] This embodiment provides a surgical reference frame omnidirectional connection and fastening device. The reference frame has three degrees of rotation, which enables omnidirectional adjustment of the reference frame to ensure that the NDI (visual detection) can capture the anti-splash reflection ball on the reference frame, providing a stable three-dimensional coordinate system for surgical navigation. On this basis, it can also prevent loosening between the reference frame and the clamps, ensure the stability of the three-dimensional coordinate system during the operation, and avoid instrument interference and other phenomena.

[0036] Please see Figures 1 to 8The surgical reference frame omnidirectional connection and fastening device provided in this embodiment includes a reference frame 1, a clamp structure, and a fastening structure. The reference frame 1 is equipped with several anti-splash reflective balls 11 spaced apart. In this embodiment, four anti-splash reflective balls 11 are provided. In other embodiments, other numbers of anti-splash reflective balls 11 can be provided, sufficient to construct a three-dimensional coordinate system. The clamp structure is used to fix the bone pin 10 and clamp the reference frame 1. The reference frame 1 and the clamp structure have one rotational degree of freedom. The clamp structure itself provides two different rotational degrees of freedom to the reference frame 1, thus achieving three rotational degrees of freedom for the reference frame 1. This allows for omnidirectional adjustment of the reference frame 1 after the bone pin 10 is inserted into the femoral and tibial shafts. Furthermore, the fastening structure assists the clamp structure itself in providing the two rotational degrees of freedom, ensuring stability after these two rotational degrees of freedom are adjusted to their proper positions, preventing loosening, and ensuring the stability of the constructed three-dimensional coordinate system.

[0037] Please see Figure 2 The clamp structure includes a hinge ball 21, a locking screw 22, a clamping block 23, and a locking nut 24.

[0038] In some embodiments, one end of the locking screw 22 is hinged to the hinge ball 21, the clamping block 23 is sleeved on the outer wall of the locking screw 22, the reference frame 1 is rotatably connected to the clamping block 23, and the locking nut 24 is screwed to the other end of the locking screw 22, and applies pressure to the clamping block 23 during the screwing process to fix the clamping block 23.

[0039] Preferably, the locking nut 24 is a handle nut, with the opposite ends of the outer wall of the locking nut 24 extending in opposite directions to form a handle, which facilitates applying force to tighten it.

[0040] For example, please refer to Figures 2 to 4 A hinge groove 211 is formed on the side of the hinge ball 21 near the clamping block 23. The hinge groove 211 is a narrow groove with a certain depth. One end of the locking screw 22 extends into the hinge groove 211 and can rotate from one end of the hinge groove 211 to the other end along its length. One end of the locking screw 22 is provided with a hinge hole. The hinge shaft 25 can pass through the hinge groove 211 and pass through the hinge hole, thereby realizing the hinge between the locking screw 22 and the hinge joint. It should be noted that the axial direction of the hinge shaft 25 is perpendicular to the hinge direction of the locking screw 22, ensuring that the locking screw 22 can rotate normally in the hinge groove 211.

[0041] Preferably, the outer wall of the end of the locking screw 22 that extends into the hinge groove 211 is milled with two fitting walls. During rotation, the two fitting walls fit against the top wall and bottom wall of the hinge groove 211 respectively, so as to ensure that the locking screw 22 can only swing along the length direction of the hinge groove 211.

[0042] With the above configuration, the reference frame 1 can rotate relative to the clamping block 23. The clamping block 23 can drive the reference frame 1 to rotate about the axis of the locking screw 22. The locking screw 22 can drive the clamping block 23 and the reference frame 1 on it to rotate relative to the hinge ball 21. Furthermore, the rotation axis of the reference frame 1 relative to the clamping block 23, the rotation axis of the clamping block 23 relative to the locking screw 22, and the rotation axis of the locking screw 22 relative to the hinge ball 21 intersect each other, thus giving the reference frame 1 three different rotational degrees of freedom.

[0043] For example, the axis of rotation of the reference frame 1 relative to the clamping block 23, the axis of rotation of the clamping block 23 relative to the locking screw 22, and the axis of rotation of the locking screw 22 relative to the hinge ball 21 are all perpendicular to each other.

[0044] Please see Figures 1 to 3 The fastening structure includes a toothed slider 31, which is also sleeved on the outer wall of the locking screw 22. The toothed slider 31 is closer to the hinge joint than the clamping block 23. A ball socket is provided on one side of the toothed slider 31, and the hinge ball 21 is rotatably disposed in the ball socket. During the process of the locking nut 24 being screwed into the locking screw 22, pressure is applied to the clamping block 23 and the toothed slider 31 to press the hinge ball 21 against the ball socket. In this embodiment, by setting the toothed slider 31, on the one hand, it can prevent the hinge between the locking screw 22 and the hinge ball 21 from loosening during the operation, and on the other hand, it can also prevent the clamping block 23 from accidentally loosening relative to the locking screw 22, thereby ensuring the stability of the reference frame 1 and improving the stability of the constructed three-dimensional coordinate system.

[0045] In some embodiments, the fastening structure further includes a first fastening unit, which includes an arc-shaped external gear ring 32 and an arc-shaped internal gear ring. (See also...) Figures 2 to 4 An arc-shaped external gear ring 32 is disposed on the hinge ball 21, and an arc-shaped internal gear ring is disposed on the ball socket, with the arc-shaped external gear ring 32 meshing with the arc-shaped internal gear ring. With this configuration, the locking nut 24 is screwed onto the other end of the locking screw 22 and rotated. During this process, the locking nut 24 sequentially pushes the clamping block 23 and the toothed slider 31 until the hinge ball 21 is pressed against the ball socket, and the arc-shaped external gear ring 32 meshes with the arc-shaped internal gear ring. Thus, with the hinge ball 21 pressed against the ball socket, rotation of the hinge ball 21 within the ball socket due to impact or its own weight is prevented, thereby preventing the toothed slider 31 from causing the locking screw 22 to rotate relative to the hinge ball 21, improving the stability of the reference frame 1.

[0046] In some embodiments, the fastening structure further includes a second fastening unit, which includes a first toothed ring 33 and a second toothed ring 34. (See also...) Figure 5 and Figure 6The first toothed ring 33 is located on the side of the toothed slider 31 away from the ball socket, and the second toothed ring 34 is located on the side of the clamping block 23. The first toothed ring 33 meshes with the second toothed ring 34. That is, when the first toothed ring 33 has external teeth, the second toothed ring 34 has internal teeth, and when the first toothed ring 33 has internal teeth, the second toothed ring 34 has external teeth, ensuring that the core of the first toothed ring 33 is in contact with the second toothed ring 34. With the above configuration, the locking nut 24 is screwed to the other end of the locking screw 22 and rotated. During this process, the locking nut 24 pushes the clamping block 23 until the first toothed ring 33 engages with the second toothed ring 34. Then, the clamping block 23 drives the toothed slider 31 to move synchronously until the articulated ball 21 is pressed against the ball socket, and the arc-shaped outer toothed ring 32 engages with the arc-shaped inner toothed ring. Thus, with the articulated ball 21 pressed against the ball socket, the clamping block 23 can be prevented from rotating relative to the toothed slider 31 due to impact or its own weight. This prevents the clamping block 23 from driving the reference frame 1 to rotate relative to the locking screw 22, further improving the stability of the reference frame 1.

[0047] Optionally, please refer to Figure 2 and Figure 6 The clamping block 23 includes a parallel first clamping arm 231 and a second clamping arm 232, which are arranged opposite to each other. That is, there is a gap between the first clamping arm 231 and the second clamping arm 232. One end of the first clamping arm 231 is connected to one end of the second clamping arm 232, and an adjustable clamping hole 230 is formed at the connection between the first clamping arm 231 and the second clamping arm 232. The tail of the reference frame 1 is provided with a plug-in rod 12, which is rotatably disposed in the clamping hole 230. After the plug-in rod 12 rotates to a preset angle in the clamping hole 230, the clamping rod 12 is locked by reducing the diameter of the clamping hole 230.

[0048] Specifically, the other end of the first clamping arm 231 is provided with a first through hole, and the other end of the second clamping arm 232 is provided with a second through hole. One end of the locking screw 22 passes through the first through hole and the second through hole and is hinged to the hinge ball 21. The locking nut 24 is screwed to the other end of the locking screw 22 and rotated until it contacts the first clamping arm 231 or the second clamping arm 232, gradually shortening the distance between the first clamping arm 231 and the second clamping arm 232, thereby reducing the diameter of the clamping hole 230 and locking the plug rod 12.

[0049] In some embodiments, please refer to Figure 2A first spring 26 is sleeved on the outer wall of the locking screw 22. One end of the first spring 26 abuts against the toothed slider 31, and the other end passes through the clamping hole 230 and abuts against the adjusting nut. Under the action of the first spring 26, as the locking nut 24 is gradually loosened, the clamping hole 230 and the plug rod 12 have a locking effect, and the clamping block 23 will not be released instantly. In addition, as the locking nut 24 is gradually tightened, the first spring 26 plays a pre-locking role, ensuring that the state of the reference frame 1 does not change from the state after accurate positioning to the final locked state.

[0050] Please refer to 2. One end of the articulated ball 21 is connected to a connecting rod 4. The end of the connecting rod 4 away from the articulated ball 21 is connected to a clamping block 5. The clamping block 5 is used to accommodate and lock the bone needle 10 to ensure that the bone needle 10 is stable and will not wobble.

[0051] In some feasible embodiments, please refer to Figure 2. The sidewall of the clamping block 5 is provided with a through hole 51. The bone needle 10 passes through the through hole 51 and is locked. Preferably, the axial direction of the through hole 51 is perpendicular to the thickness direction of the clamping block 5. In this embodiment, the clamping block 5 is provided with two through holes 51 spaced apart. Two bone needles 10 pass through the two through holes 51 respectively and are locked at the same time.

[0052] Please see Figure 2 and Figure 4 In this embodiment, the bone needle 10 is locked by the pressure block 6 and the tensioning screw 7. Specifically, one end of the clamping block 5 is provided with a locking hole 52, and the opposite end of the clamping block 5 is provided with a locking cavity 53. The locking cavity 53 extends to connect with the locking hole 52, and the through hole 51 provided on the clamping block 5 also connects to the locking cavity 53. One end of the pressure block 6 extends into the locking cavity 53, and the tensioning screw 7 extends into the locking hole 52 and is screwed to the internal thread provided on the pressure block 6. Tightening the tensioning screw 7 pulls the pressure block 6 to slide in the locking cavity 53. It should be noted that the axial direction of the tensioning screw 7 is also the sliding direction of the pressure block 6 in the locking cavity 53. In this embodiment, the axial direction of the bone needle 10 intersects with the sliding direction of the pressure block 6. Therefore, after the pressure block 6 slides to a certain position, it can press against the bone needle 10 to achieve locking of the bone needle 10.

[0053] Preferably, the locking nut 24 is provided with a handle at the end away from the pressure block 6, so as to facilitate applying force to tighten it.

[0054] Accordingly, this embodiment is provided with two bone pins 10 and two perforations 51. The two perforations 51 are located on opposite sides of the locking cavity 53 and are both connected to the locking cavity 53. After the pressure block 6 slides to a certain position, its two side walls simultaneously press against the two bone pins 10, and the two bone pins 10 are locked at the same time.

[0055] In some feasible embodiments, please refer to Figure 7The end of the pressure block 6 that extends into the locking cavity 53 is provided with an inclined wall 61, and the distance between the inclined wall 61 and the cavity wall of the locking cavity 53 that is close to it gradually shortens in the direction away from the locking hole 52. That is, during the sliding process of the slider in the locking cavity 53, the distance between the inclined wall 61 and the bone needle 10 gradually shortens, slowly pressing against the bone needle 10 and reducing the impact of the pressure block 6 on the bone needle 10.

[0056] Accordingly, the pressure block 6 is drilled with an internal thread on the end face of the tensioning screw 7, and the two side walls connected to the end face are both set as inclined walls 61.

[0057] In some feasible embodiments, please refer to Figure 2 A second spring 8 is fitted onto the tension screw 7. A limiting step is provided on the outer wall of the tension screw 7. One end of the second spring 8 abuts against the limiting step, and the other end abuts against the pressure block 6. Under the action of the second spring 8, when the tension screw 7 is loosened, the pressure block 6 will be able to adaptively slide towards the outside of the locking cavity 53, reducing the difficulty of loosening the tension screw 7.

[0058] During use, the tension screw 7 rotates relative to the clamping block 5, causing the pressure block 6 to press against the bone needle 10 to clamp and lock it in place. If the tension screw 7 moves axially during this process, the pressure block 6 will not be able to slide into place and thus will fail to press against the bone needle 10. Therefore, please refer to... Figure 2 and Figure 4 A limiting pin 9 is inserted into the clamping block 5. The end of the tensioning screw 7 away from the pressure block 6 is provided with an annular groove. The limiting pin 9 is inserted into the clamping block 5, and a part of the outer peripheral wall of the limiting pin 9 is rotatably disposed in the annular groove, thereby limiting the axial movement of the tensioning screw 7 and not hindering the rotation of the tensioning screw 7.

[0059] Preferably, the limiting pin 9 is inserted into the clamping block 5 along the axial direction of the bone needle 10, thereby improving the fit between the limiting pin 9 and the annular groove.

[0060] In some feasible embodiments, two limiting pins 9 are provided, with the two limiting pins 9 located on both sides of the tension screw 7 axially, so as to improve the limiting effect on the tension screw 7.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A surgical reference frame omnidirectional connection fastening device, characterized by, include: Reference frame (1); The clamp structure includes a hinge ball (21), a locking screw (22), a clamping block (23), and a locking nut (24). The hinge ball (21) is connected to the bone needle (10). One end of the locking screw (22) is hinged to the hinge ball (21). The clamping block (23) is sleeved on the locking screw (22). The reference frame (1) is rotatably connected to the clamping block (23). The locking nut (24) is screwed to the other end of the locking screw (22) and fixes the clamping block (23). The fastening structure includes a toothed slider (31), a first fastening unit, and a second fastening unit. The toothed slider (31) is sleeved on the locking screw (22). A ball socket is provided on one side of the toothed slider (31). The hinge ball (21) is rotatably disposed in the ball socket. The first fastening unit includes an arc-shaped external toothed ring (32) disposed on the hinge ball (21) and an arc-shaped internal toothed ring disposed on the ball socket that meshes with the arc-shaped external toothed ring (32). The second fastening unit includes a first toothed ring (33) disposed on the side of the toothed slider (31) away from the ball socket and a second toothed ring (34) disposed on the clamping block (23) that meshes with the first toothed ring (33).

2. A universal connecting and fastening device for a surgical reference frame according to claim 1, characterized in that, The clamping block (23) is provided with a clamping hole (230) with an adjustable diameter. The plug rod (12) of the reference frame (1) is rotatably disposed in the clamping hole (230) and can be locked in the clamping hole (230).

3. A universal connecting and fastening device for a surgical reference frame according to claim 2, characterized in that The clamping block (23) includes a first clamping arm (231) and a second clamping arm (232) arranged in parallel opposite directions. One end of the first clamping arm (231) is connected to one end of the second clamping arm (232), and the clamping hole (230) is formed at the end where the first clamping arm (231) and the second clamping arm (232) are connected. The other end of the first clamping arm (231) is provided with a first through hole, and the other end of the second clamping arm (232) is provided with a second through hole. The locking screw (22) passes through the first through hole and the second through hole. The locking nut (24) is configured to shorten the distance between the first clamping arm (231) and the second clamping arm (232) and reduce the diameter of the clamping hole (230) to lock the plug rod (12).

4. A surgical reference frame omnidirectional connection and fastening device according to any one of claims 1-3, characterized in that, The hinge ball (21) has a hinge groove (211), one end of the locking screw (22) extends into the hinge groove (211) and has a hinge hole, the hinge shaft (25) passes through the hinge groove (211) and is provided in the hinge hole, and the axial direction of the hinge shaft (25) is perpendicular to the hinge direction of the locking screw (22).

5. A universal connecting and fastening device for a surgical reference frame according to any one of claims 2-3, characterized in that, The outer wall of the locking screw (22) is fitted with a first spring (26), and one end of the first spring (26) abuts against the toothed slider (31), and the other end passes through the clamping hole (230) and abuts against the locking nut (24).

6. A universal connecting and fastening device for a surgical reference frame according to any one of claims 1-3, characterized in that, The hinge ball (21) is connected to the connecting rod (4), and the end of the connecting rod (4) away from the hinge ball (21) is connected to a clamping block (5). The side wall of the clamping block (5) is provided with a through hole (51), and the bone needle (10) is inserted and locked in the through hole (51).

7. A universal connecting and fastening device for a surgical reference frame according to claim 6, characterized in that It also includes a threaded clamping block (6) and a tensioning screw (7). One end of the clamping block (5) is provided with a locking hole (52), and the opposite end is provided with a locking cavity (53) that connects the locking hole (52) and the through hole (51). The clamping block (6) is slidably disposed in the locking cavity (53). The axial direction of the bone needle (10) intersects with the sliding direction of the clamping block (6). One end of the tensioning screw (7) extends into the locking hole (52) and is screwed to the clamping block (6) so as to drive the clamping block (6) to slide and press against the bone needle (10).

8. A universal connecting and fastening device for a surgical reference frame according to claim 7, characterized in that The end of the pressure block (6) that extends into the locking cavity (53) is provided with an inclined wall (61), and the distance between the inclined wall (61) and the cavity wall of the nearby locking cavity (53) gradually shortens in the direction away from the locking hole (52).

9. A universal connecting and fastening device for a surgical reference frame according to claim 7, characterized in that, A limiting pin (9) is inserted into the clamping block (5), and an annular groove is provided at the end of the tensioning screw (7) away from the pressure block (6), and the limiting pin (9) is rotatably disposed in the annular groove.

10. A surgical reference frame omnidirectional connection and fastening device according to claim 7, characterized in that, A second spring (8) is fitted on the tensioning screw (7), and a limiting step is provided on the outer wall of the tensioning screw (7). The second spring (8) abuts against the limiting step between the pressure block (6).

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