A navigation tracker fixation device

Abstract

The application relates to a navigation tracker fixing device in the technical field of artificial joints, which comprises a fixing block, a locking block, a locking rod and a lower jaw, a plurality of through holes are formed in the fixing block, the locking block is partially embedded in the fixing block, the locking block and the fixing block are in sliding connection, the locking rod passes through the locking block, the locking rod is partially embedded in the fixing block, a lower jaw ring is installed on the locking rod, a driving spring is fixed between the lower jaw and the locking block, when a bone nail is fixed by using the device, the bone nail passes through the through hole, the bone nail is in close abutment with the fixing block and the locking block, at the moment, the driving spring is in a compressed state, and a support is installed on the locking rod. The application has the effect of convenient use.

Description

Technical Field

[0001] This application relates to the technical field of artificial joints, and in particular to a navigation tracker fixation device. Background Technology

[0002] As people's lives develop at an increasingly rapid pace and medical standards rise, in hip, knee, and unicompartmental joint replacement surgeries, a robotic navigation system is needed to locate the tibia and femur when replacing the corresponding joints. The robotic navigation system consists of two parts: a support and an NDI device. When using the robotic navigation system, bone screws are inserted into the tibia and femur, a fixation device is installed on the bone screws, and then the support is installed on the fixation device. The NDI device and the support work together to locate the position of the tibia and femur.

[0003] The main body of a typical fixation device is looped around the bone screw. The fixation device is fixed to the bone screw by a locking block and a threaded rod. Tightening the threaded rod causes the locking block to slide, and the locking block and the main body together clamp the bone screw. Then the bracket is installed on the main body. When it is necessary to adjust the position of the bracket, the threaded rod needs to be loosened, the position of the main body on the bone screw needs to be adjusted, and then the threaded rod needs to be tightened.

[0004] Regarding the aforementioned technologies, the inventors believe that adjusting the position of the stent during surgery requires repeatedly loosening and tightening the threaded rod, which is inconvenient to use. Summary of the Invention

[0005] To achieve ease of use, this application provides a navigation tracker fixing device.

[0006] The navigation tracker fixing device provided in this application adopts the following technical solution:

[0007] A navigation tracker fixing device includes a fixing block, a locking block, a locking rod, and a lower jaw. The fixing block has multiple through holes. The locking block is partially embedded in the fixing block, and the locking block and the fixing block are slidably connected. The locking rod passes through the locking block, and the locking rod is partially embedded in the fixing block. The lower jaw is fitted onto the locking rod. A drive spring is fixed between the lower jaw and the locking block. When the device is fixed to a bone screw, the bone screw passes through the through holes, and the bone screw, the fixing block, and the locking block are all tightly abutted. At this time, the drive spring is in a compressed state, and a bracket is installed on the locking rod.

[0008] By adopting the above technical solution, bone screws are first inserted into the tibia and femur. Then, the fixation device is removed, the locking block is slid out, and the bone screws are aligned with the through holes and inserted, one bone screw corresponding to one through hole, until the bone screw passes through the fixation device. The locking block is then released, and under the action of the drive spring, the locking block springs back. The locking block and the fixation block together clamp the bone screw, thereby fixing the device to the bone screw. Then, the bracket is installed on the locking rod, and the operation can begin. During the operation, when it is necessary to adjust the position of the fixation device on the bone screw, the locking block is slid, the locking block and the bone screw are separated, and then the fixation device is slid to adjust the position of the fixation device. When the desired position is reached, the locking block is released, and the locking block and the fixation block clamp and fix the bone screw, achieving a convenient effect.

[0009] Optionally, an upper jaw is provided at the end of the lower jaw away from the drive spring. The upper jaw is mounted on the locking rod, and the lower jaw and the locking rod are slidably connected. When the bracket is mounted on the locking rod, the mounting part of the bracket is embedded between the lower jaw and the upper jaw, and the mounting part of the bracket is in close contact with both the lower jaw and the upper jaw. At this time, the drive spring is in a compressed state.

[0010] By adopting the above technical solution, when it is necessary to install the bracket, the lower jaw is slid to embed the mounting part of the bracket between the upper jaw and the lower jaw. When the lower jaw is released, the driving spring will spring the lower jaw back under the action of the driving spring. Both the upper jaw and the lower jaw will be tightly abutted against the mounting part of the bracket, thereby fixing the bracket. When it is necessary to remove the bracket, the lower jaw is slid to remove the bracket, thus achieving the effect of convenient use.

[0011] Optionally, an adjustment chamber is provided at the end of the upper jaw away from the lower jaw. The adjustment chamber is always in close contact with the upper jaw, and the end of the locking rod away from the fixing block is always inside the adjustment chamber. The adjustment chamber and the locking rod are threaded together.

[0012] By adopting the above technical solution and adjusting the setting of the chamber, the upper jaw is limited, thereby limiting the upper and lower jaws and preventing them from being pushed by the drive spring, thus achieving the effect of limiting the upper and lower jaws.

[0013] Optionally, an upper tooth is fixed to one end of the lower jaw near the locking block, and a lower tooth is fixed to one end of the locking block near the lower jaw. When the upper and lower teeth are close together, they mesh.

[0014] By adopting the above technical solution, after the bone screw and bracket are installed, the adjustment chamber is rotated. The adjustment chamber and the locking rod are threaded together, so that the adjustment chamber moves along the length of the locking rod, pushing the upper and lower jaws to slide toward the locking block until the upper and lower teeth mesh, locking the fixation device and achieving the effect of improving the stability of the fixation device.

[0015] Optionally, two clamping plates are arranged opposite each other in the adjustment chamber. Each clamping plate is fixed with a fixing spring between itself and the inner wall of the adjustment chamber. When it is necessary to lock the locking rod, both clamping plates are tightly abutted against the locking rod, clamping the locking rod. At this time, the fixing spring is in a compressed state.

[0016] By adopting the above technical solution, the clamping plate and the fixing spring are set to lock the locking rod. At this time, the fixing spring is in a compressed state, which improves the locking effect and enhances the stability of the fixing device.

[0017] Optionally, an adjustment block is rotatably provided between the two clamping plates. The end face of the adjustment block is fan-shaped. When both ends of the farthest part of the fan-shaped adjustment block abut against the clamping plate, the clamping plate does not contact the locking rod. An adjustment knob is rotatably provided outside the adjustment chamber. The adjustment knob and the adjustment block are fixedly connected.

[0018] By adopting the above technical solution, when it is necessary to lock the locking rod, the adjustment knob is rotated. The adjustment knob and the adjustment block are fixedly connected, thereby rotating the adjustment block. The farthest two ends of the sector of the adjustment block do not abut against the clamping plate, thereby fixing the spring to push the clamping plate and clamp the locking rod, thus locking the locking rod. When it is not necessary to lock the locking rod, the adjustment knob is rotated so that the farthest two ends of the sector of the adjustment block abut against the clamping plate, thus opening the clamping plate and disengaging it from the locking rod, thereby improving the stability of the fixing device.

[0019] Optionally, a rotating rod is fixed to the outer wall of the adjustment chamber, and an extension rod is slidably provided at the end of the rotating rod away from the adjustment chamber. One end of the extension rod is embedded in the rotating rod. A fixing hole is provided on the rotating rod, and multiple fixing slots are provided on the extension rod. A positioning rod is provided on the rotating rod, and the positioning rod passes through the fixing hole and is embedded in any one of the fixing slots.

[0020] By adopting the above technical solution, when it is necessary to rotate the adjustment chamber, hold the extension rod and rotate the adjustment chamber. Before rotating, pull out the positioning rod, slide the extension rod, and adjust the overall length of the rotating rod and the extension rod, thereby changing the torque, making it easier to rotate the extension rod and achieving the effect of saving effort and speed.

[0021] Optionally, a return spring is provided on the positioning rod ring. When the positioning rod passes through the fixing hole and is embedded in the fixing groove, the return spring is in its natural state.

[0022] By adopting the above technical solution, when it is necessary to adjust the overall length of the rotating rod and the extension rod, the positioning rod is pulled out, and the extension rod is slid to adjust the overall length of the rotating rod and the extension rod. When the overall length of the rotating rod and the extension rod is adjusted to the required value, the positioning rod is released, and the positioning rod springs back under the action of the return spring, thus re-fixing the rotating rod and the extension rod, achieving a convenient and quick effect.

[0023] Optionally, the fixing block, locking block, and locking rod are provided with reinforcing rods, and when the bone nail is fixed, the reinforcing rods pass through the fixing block, locking block, and locking rod simultaneously.

[0024] By adopting the above technical solution and setting the reinforcing rod, the connection between the fixing block, locking block and locking rod is made more secure, thereby increasing the stability of the connection between the fixing block, locking block and locking rod.

[0025] Optionally, an enlarged plate is fixed to the side wall of the locking block.

[0026] By adopting the above technical solution and setting the expansion plate, when the locking block needs to be slidable, the locking block can be slidable by sliding the expansion plate, achieving a convenient and quick effect.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The arrangement of the fixing block, locking block, locking rod, lower jaw, through hole, drive spring, and upper jaw achieves a convenient user experience;

[0029] 2. Adjust the settings of the chamber to achieve the effect of limiting the upper and lower jaws;

[0030] 3. The design of the upper teeth, lower teeth, clamping plate, fixing spring, and adjusting knob improves the stability of the fixing device;

[0031] 4. The design of the rotating rod, extension rod, fixing hole, fixing groove, and positioning rod achieves a labor-saving and quick effect;

[0032] 5. The design of the reset spring and the expansion plate achieves a convenient and quick result. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0034] Figure 2 This is a schematic diagram showing the internal structure of the adjustment compartment;

[0035] Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0036] In the diagram, 1 is a fixing block; 11 is a through hole; 2 is a locking block; 3 is a locking rod; 4 is a lower jaw; 41 is a drive spring; 42 is a lower tooth; 5 is an upper jaw; 51 is an upper tooth; 6 is an adjustment chamber; 61 is a clamping plate; 62 is a fixing spring; 63 is an adjusting block; 64 is an adjusting knob; 65 is a rotating rod; 66 is an extension rod; 67 is a fixing hole; 68 is a fixing groove; 69 is a positioning rod; 7 is a return spring; 8 is a reinforcing rod; and 9 is an enlarged plate. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0038] This application discloses a navigation tracker fixing device.

[0039] Reference Figure 1 A navigation tracker fixing device includes a fixing block 1, a locking block 2, and a locking rod 3. The fixing block 1 is the main body that supports the bone screw, and the locking block 2 and the locking rod 3 are used together to fix the bone screw and the bracket.

[0040] Reference Figure 1 The fixing block 1 has two through holes 11. When the fixing device is used to fix the bone screw, the bone screw passes through the through hole 11. Each bone screw corresponds to one through hole 11. The bone screw and the fixing block 1 are slidably connected. The sliding direction is set along the length direction of the bone screw. The locking block 2 is partially embedded in the fixing block 1. The locking block 2 and the fixing block 1 are slidably connected. One end of the locking rod 3 passes through the locking block 2 and is embedded in the fixing block 1. The locking rod 3, the locking block 2, and the fixing block 1 are all slidably connected. When the fixing device is used to fix the bone screw, the bone screw passes through the through hole 11. The fixing and locking blocks 2 and the fixing block 1 are all tightly abutted.

[0041] A reinforcing rod 8 is provided on the fixing block 1, locking block 2, and locking rod 3. The reinforcing rod 8 passes through the fixing block 1, locking block 2, and locking rod 3. The reinforcing rod 8 is slidably connected to the fixing block 1, locking block 2, and locking rod 3. When the fixation device is used to fix the bone screw, the reinforcing rod 8 is passed through the fixing block 1, locking block 2, and locking rod 3. When the position of the bone screw needs to be adjusted during surgery, the reinforcing rod 8 is slid out, the locking block 2 is slid to disengage the locking block 2 from the bone screw, and then the bone screw is slid to adjust its position. When the bone screw is adjusted to the required position, the locking block is slid back, and then the reinforcing rod 8 is slid in to fix the bone screw.

[0042] Reference Figure 1 An enlarged plate 9 is fixed on the side wall of the locking block 2. The enlarged plate 9 is parallel to the end face of the locking block 2. When it is necessary to slide the locking block 2, the locking block 2 can be slid by sliding the enlarged plate 9. Sliding the enlarged plate 9 is more convenient than sliding the locking block 2.

[0043] Reference Figure 1 A drive spring 41 is provided at the end of the locking block 2 away from the fixing block 1. The drive spring 41 is looped around the locking rod 3. One end of the drive spring 41 is fixedly connected to the locking block 2. The lower jaw 4 is fixed at the end of the drive spring 41 away from the locking block 2. The lower jaw 4 is looped around the locking rod 3. The lower jaw 4 and the locking rod 3 are slidably connected. The sliding direction is set along the length direction of the locking rod 3. When the sliding locking block 2 is disengaged from the bone screw, the drive spring 41 is in a compressed state.

[0044] The locking block 2 has a lower tooth 42 fixed at one end near the lower jaw 4, and an upper tooth 51 fixed at the other end of the lower jaw 4 near the locking block 2. When the upper tooth 51 and the lower tooth 42 are close together, they engage. After the locking block 2 and the fixing block 1 fix the bone screw, the lower jaw 4 is slid until the upper tooth 51 and the lower tooth 42 engage, further locking it.

[0045] Reference Figure 1 The lower jaw 4 is provided with an upper jaw 5 at the end away from the drive spring 41. The upper jaw 5 is ring-mounted on the locking rod 3. The upper jaw 5 and the locking rod 3 are slidably connected, and the sliding direction is set along the length direction of the locking rod 3. The lower jaw 4 is embedded in the upper jaw 5. At this time, there is a distance between the lower jaw 4 and the upper jaw 5. The lower jaw 4 and the upper jaw 5 are slidably connected, and the sliding direction is set along the length direction of the locking rod 3. When the bracket is installed, the mounting part of the bracket is embedded between the lower jaw 4 and the upper jaw 5. The mounting part of the bracket, the lower jaw 4, and the upper jaw 5 are all tightly abutted. At this time, the drive spring 41 is in a compressed state. When it is necessary to remove or replace the bracket, slide the lower jaw 4 to take out the bracket, and then install the new bracket. Loosen the lower jaw 4 and clamp the mounting part of the new bracket.

[0046] Reference Figure 1 An adjustment chamber 6 is provided at the end of the upper jaw 5 away from the lower jaw 4. The adjustment chamber 6 is installed at the end of the locking rod 3 away from the fixing block 1. The adjustment chamber 6 and the locking rod 3 are threadedly connected. The end of the locking rod 3 away from the fixing block 1 is always inside the adjustment chamber 6. The end of the adjustment chamber 6 near the upper jaw 5 is always in close contact with the upper jaw 5. When it is necessary to slide the upper jaw 5 and the lower jaw 4 for locking, the adjustment chamber 6 is rotated. The adjustment chamber 6 slides along the length of the locking rod 3 toward the fixing block 1, thereby pushing the upper jaw 5 and the lower jaw 4 to slide until the upper tooth 51 and the lower tooth 42 mesh, thus completing the locking.

[0047] Reference Figure 1 , Figure 2 and Figure 3 Two clamping plates 61 are arranged opposite each other inside the adjustment chamber 6. Both clamping plates 61 are slidably connected to the adjustment chamber 6. A locking rod 3 is arranged between the two clamping plates 61 and slides towards the locking rod 3. A fixing spring 62 is arranged between each clamping plate 61 and the inner wall of the adjustment chamber 6. One end of the fixing spring 62 is fixedly connected to the inner wall of the adjustment chamber 6, and the other end of the fixing spring 62 is fixedly connected to the clamping plate 61. An adjusting block 63 is arranged between the two clamping plates 61. The adjusting block 63 is rotatably connected to the adjustment chamber 6. The rotating shaft is perpendicular to the adjustment chamber 6 and parallel to both clamping plates 61. The end face of the adjusting block 63 is fan-shaped. When the farthest two ends of the fan-shaped adjusting block 63 are in contact with the clamping plate 61, the clamping plate 61 is not in contact with the locking rod 3. When the adjusting block 63 is rotated, under the action of the fixing spring 62, the clamping plate 61 is pushed to clamp the locking rod 3, thereby completing the locking. At this time, the fixing spring 62 is in a compressed state.

[0048] A vertical rod is fixed inside the adjusting block 63. The length direction of the vertical rod is the same as that of the adjusting block 63. One end of the vertical rod passes through the adjusting chamber 6 and is located outside the adjusting chamber 6. The vertical rod and the adjusting chamber 6 are rotatably connected. The rotating shaft is set along the length direction of the vertical rod. An adjusting knob 64 is set outside the adjusting chamber 6. The adjusting knob 64 is fixedly connected to the vertical rod and rotatably connected to the adjusting chamber 6. When locking is required, the adjusting knob 64 is rotated to lock the locking rod 3.

[0049] Reference Figure 2 and Figure 3 A rotating rod 65 is fixed to the outer wall of the adjustment chamber 6. The length direction of the rotating rod 65 is perpendicular to the locking rod 3. An extension rod 66 is provided at the end of the rotating rod 65 away from the adjustment chamber 6. The length direction of the extension rod 66 is the same as that of the rotating rod 65. One end of the extension rod 66 is embedded in the rotating rod 65. The extension rod 66 and the rotating rod 65 are slidably connected. The sliding direction is set along the length direction of the extension rod 66. A fixing hole 67 is opened at the end of the rotating rod 65 away from the adjustment chamber 6. Multiple fixing grooves 68 are opened on the extension rod 66. The multiple fixing grooves 68 are equally spaced along the length direction of the extension rod 66. The length direction of the multiple fixing grooves 68 is perpendicular to the length direction of the extension rod 66.

[0050] A positioning rod 69 is provided on the rotating rod 65. The positioning rod 69 passes through the fixing hole 67 and is embedded in any of the fixing slots 68. The positioning rod 69, the rotating rod 65, and the extension rod 66 are all slidably connected. The sliding direction is set along the length direction of the fixing slot 68. A return spring 7 is sleeved on the positioning rod 69. The length direction of the return spring 7 is the same as the length direction of the positioning rod 69. One end of the return spring 7 is fixedly connected to the outer wall of the rotating rod 65, and the other end of the return spring 7 is fixedly connected to the positioning rod 69. When the positioning rod 69 passes through the fixing hole 67 and is embedded in the fixing slot 68, the return spring 7 is in its natural state. When it is necessary to rotate the adjustment chamber 6, the positioning rod 69 is pulled out, the extension rod 66 is slid, and the overall length of the rotating rod 65 and the extension rod 66 is adjusted to adjust the torque, which is more labor-saving. When the overall length of the rotating rod 65 and the extension rod 66 is adjusted to the required length, the positioning rod 69 is released, the rotating rod 65 and the extension rod 66 are fixed, and the adjustment chamber 6 can be rotated by the extension rod 66.

[0051] The implementation principle of the navigation tracker fixing device in this application embodiment is as follows: When the fixing device is needed, press and hold the expansion plate 9 and slide the locking block 2 to put the fixing block 1 around the bone nail. Then release the locking block 2, drive the spring 41 to spring the locking block 2 back, clamp and fix the bone nail. Then slide the lower jaw 4 to place the mounting part of the bracket between the lower jaw 4 and the upper jaw 5. Release the lower jaw 4 and clamp and fix the mounting part of the bracket. Then pull out the positioning rod 69, slide the extension rod 66, adjust the overall length of the rotating rod 65 and the extension rod 66. After adjustment, release the positioning rod 69, rotate the extension rod 66, thereby rotating the adjustment chamber 6 until the upper tooth 51 and the lower tooth 42 mesh. Then turn the adjustment knob 64 to lock the locking rod 3.

[0052] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A navigation tracker fixation device, characterized by: The utility model provides a fixing device for bone nail, including fixed block (1), locking block (2), locking rod (3) and lower jaw (4), a plurality of through holes (11) are seted up in fixed block (1), locking block (2) is partially embedded in fixed block (1), locking block (2) and fixed block (1) are slidably connected, locking rod (3) passes through locking block (2), locking rod (3) is partially embedded in fixed block (1), lower jaw (4) is ringed and is installed on locking rod (3), and the drive spring (41) is fixed between lower jaw (4) and locking block (2), when the device is fixed on the bone nail, the bone nail passes through the through hole (11), and the bone nail is closely contacted with fixed block (1) and locking block (2), at this time, the drive spring (41) is in compression state, the bracket is installed on locking rod (3); The end, away from the drive spring (41), of the lower jaw (4) is provided with an upper jaw (5), the upper jaw (5) is installed on the locking rod (3), the lower jaw (4) and the locking rod (3) are slidably connected, when the bracket is installed on the locking rod (3), the mounting portion of the bracket is embedded between the lower jaw (4) and the upper jaw (5), the mounting portion of the bracket is closely contacted with the lower jaw (4) and the upper jaw (5), at this time, the drive spring (41) is in compression state; The end, away from the lower jaw (4), of the upper jaw (5) is provided with an adjusting bin (6), the adjusting bin (6) is always closely contacted with the upper jaw (5), the end, away from the fixed block (1), of the locking rod (3) is always in the adjusting bin (6), the adjusting bin (6) and the locking rod (3) are threadedly connected; Two clamping plates (61) are oppositely arranged in the adjusting bin (6), a fixed spring (62) is fixed between each clamping plate (61) and the inner wall of the adjusting bin (6), when it is needed to lock the locking rod (3), the two clamping plates (61) are closely contacted with the locking rod (3), the locking rod (3) is clamped, at this time, the fixed spring (62) is in compression state; An adjusting block (63) is rotatably arranged between the two clamping plates (61), the end face of the adjusting block (63) is fan-shaped, when the two ends, farthest from each other, of the fan-shaped adjusting block (63) are contacted with the clamping plates (61), the clamping plates (61) are not contacted with the locking rod (3), an adjusting knob (64) is rotatably arranged outside the adjusting bin (6), the adjusting knob (64) and the adjusting block (63) are fixedly connected.

2. A navigation tracker fixation device according to claim 1, characterized in that: The end, close to the locking block (2), of the lower jaw (4) is fixed with an upper tooth (51), the end, close to the lower jaw (4), of the locking block (2) is fixed with a lower tooth (42), when the upper tooth (51) and the lower tooth (42) are close to each other, the upper tooth (51) and the lower tooth (42) are engaged.

3. The navigation tracker fixation device of claim 1, wherein: A rotating rod (65) is fixed to the outer wall of the adjusting bin (6), the end, away from the adjusting bin (6), of the rotating rod (65) is slidably provided with an extension rod (66), the end of the extension rod (66) is embedded in the rotating rod (65), a fixing hole (67) is formed in the rotating rod (65), a plurality of fixing grooves (68) are formed in the extension rod (66), a positioning rod (69) is arranged on the rotating rod (65), the positioning rod (69) passes through the fixing hole (67) and is embedded in any one of the fixing grooves (68).

4. A navigation tracker fixation device according to claim 3, characterized in that: The positioning rod (69) is fitted with a return spring (7). When the positioning rod (69) passes through the fixing hole (67) and is embedded in the fixing groove (68), the return spring (7) is in its natural state.

5. The navigation tracker fixation device of claim 1, wherein: The fixing block (1), locking block (2) and locking rod (3) are provided with reinforcing rods (8). When fixing the bone nail, the reinforcing rods (8) pass through the fixing block (1), locking block (2) and locking rod (3) at the same time.

6. The navigation tracker fixation device of claim 1, wherein: An enlarged plate (9) is fixed on the side wall of the locking block (2).

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