Implant fixing equipment

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to implant fixing equipment which comprises a bone plate and a bone tissue, the lower end of the bone plate is fixedly connected with a bone nail, the inner bottom end of the bone nail is rotatably connected with a gear, two opposite side walls of the bone nail are provided with rectangular grooves, the inner bottom end of the bone nail is connected with two racks in a sliding mode, and the two racks are fixedly connected with the bone plate. The racks are meshed with the gears, limiting mechanisms used for limiting the racks are installed in the rectangular grooves, the side walls of the racks are connected with clamping blocks through second springs, and the upper ends of the racks are fixedly connected with sliding blocks. The device is reasonable in structure, the rotating rod is rotated to drive the gear to rotate, the racks on the two sides are promoted to move reversely, and the clamping block enters the third groove accordingly. When the clamping block touches the inner wall of the groove, the clamping block stops moving, the rack continues to move, the second spring is compressed, and tight fixation of the bone nail and the bone tissue is achieved. If fixation needs to be removed, only the rotating rod needs to be rotated reversely, special tools are not needed, surgical operation is effectively simplified, and time cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically an implant fixation device. Background Technology

[0002] Traditional biomechanical studies of internal fixation implants focus on the mechanical coupling mechanism between bone plates, bone screws, and bone tissue: the bone plate forms a rigid lock with the bone screw through pre-set screw holes, and after the screw is anchored into the bone tissue, a load transmission path is established—part of the stress is borne by the screw itself, and the other part is transmitted to the adjacent bone block through the bone-screw interface, ultimately forming a three-level mechanical transmission system of "plate-screw-bone". Its stability depends on the synergistic effect of screw preload, bone density, and interfacial friction.

[0003] Currently, various methods have been proposed for implant fixation devices. For example, patent application CN216148177U discloses a snap-fit ​​internal fixation implant, including a bone plate and snap-fit ​​pins. The bone plate and snap-fit ​​pins are integrated, and a connection hole is drilled in the bone tissue to be fixed. The snap-fit ​​pins can be inserted into the connection hole to achieve a fixed connection between the bone plate and the bone tissue. The end of the snap-fit ​​pin away from the bone plate is provided with a first elastic plate. The first elastic plate has multiple leaf-shaped pieces, and each first elastic plate is unfolded towards the bone plate. The connection hole is set in an inverted T-shape. However, after the first elastic plate is inserted into the connection hole, it fully unfolds and gets stuck in the inverted connection hole. Since the elastic plate cannot actively reset, it is difficult to remove the snap-fit ​​pin from the connection hole. If it needs to be removed, special tools (such as dilators or cutters) are required to assist in removal, which increases the complexity and time cost of the operation.

[0004] Therefore, this utility model provides an implant fixation device. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The implant fixation device of this utility model includes a bone plate and bone tissue. A bone screw is fixedly connected to the lower end of the bone plate. A gear is rotatably connected to the bottom end of the bone screw. Rectangular grooves are opened on opposite side walls of the bone screw. Two racks are slidably connected to the bottom end of the bone screw. The racks mesh with the gear. A limiting mechanism for limiting the racks is installed in the rectangular groove. A locking block is connected to the side wall of the rack through a second spring. A slider is fixedly connected to the upper end of each rack. A sliding groove is opened at the bottom end of the locking block. The slider slides in adjacent sliding grooves. A rotating rod is fixedly connected to the upper end of the gear. The rotating rod passes through the rotating bone plate. A second groove and a third groove are opened in the bone tissue respectively. The locking block corresponds to the third groove. A fixing mechanism for fixing the rotating rod is installed at the upper end of the bone plate.

[0007] Preferably, the limiting mechanism includes two sliding plates, each of which is fixedly installed on the side wall of two racks. The rectangular groove has a sliding track on its inner wall, and the sliding plate slides in the adjacent sliding track.

[0008] Preferably, the fixing mechanism includes a rotating plate and a pin. The rotating plate is fixedly installed on the upper end of the rotating rod, and the pin is slidably installed on the rotating plate. The pin passes through the rotating plate. The upper end of the bone plate has four insertion holes, each of which corresponds to the pin. A reset mechanism for resetting the pin is installed inside the rotating plate.

[0009] Preferably, the upper end of the pin is provided with an anti-slip sleeve.

[0010] Preferably, the reset mechanism includes a first spring, a first groove is provided in the rotating plate, the pin slides in the first groove, one end of the first spring is fixedly installed on the inner upper wall of the first groove, and the other end of the first spring is fixedly installed on the side wall of the pin.

[0011] Preferably, the sidewall of the card block has a soft surface.

[0012] Preferably, the slider is mounted on the upper end of the rack near the locking block.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The implant fixation device of this utility model drives the gear to rotate by rotating the rotating rod, which in turn causes the racks on both sides of the gear to move in opposite directions, so that the locking blocks enter the third groove. As the gear rotates, the locking blocks contact the inner wall of the third groove, so that the two locking blocks stop moving while the racks continue to move, thereby compressing the second spring, achieving the effect of fixing the bone nail to the bone tissue. At the same time, the rotating rod can be rotated in the opposite direction to release the fixation effect between the bone nail and the bone tissue. The removal process does not require special tools, reducing the complexity of the surgery and the time cost.

[0015] 2. The implant fixation device of this utility model allows the pin to be pulled upwards, causing it to move out of the insertion hole. This allows the rotating plate to drive the rotating rod to rotate. When the pin is released, the compressed first spring returns to its original position, allowing the device to automatically enter another insertion hole and achieve the fixation effect again. This prevents the rotating plate from spontaneously driving the rotating rod to rotate when the locking block enters the third groove to fix the bone tissue and bone screw, thus avoiding loosening of the fixation due to external force or vibration and improving the long-term stability of the implant. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the rotating plate of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of bone tissue according to this utility model;

[0020] Figure 4 This is a partial structural schematic diagram of the rotating rod of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the card block of this utility model.

[0022] In the diagram: 1. Bone plate; 2. Bone tissue; 3. Rotating plate; 4. Anti-slip sleeve; 5. Pin; 6. Insertion hole; 7. Rotating rod; 8. First groove; 9. First spring; 10. Second groove; 11. Third groove; 12. Bone nail; 13. Rectangular groove; 14. Gear; 15. Rack; 16. Locking block; 17. Second spring; 18. Slider; 19. Slide groove; 20. Slide plate; 21. Slide track. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] like Figures 1 to 5As shown in the embodiment of this utility model, an implant fixation device includes a bone plate 1 and bone tissue 2. A bone nail 12 is fixedly connected to the lower end of the bone plate 1. A gear 14 is rotatably connected to the bottom end of the bone nail 12. Rectangular grooves 13 are formed on opposite side walls of the bone nail 12. Two racks 15 are slidably connected to the bottom end of the bone nail 12. The racks 15 mesh with the gear 14. A limiting mechanism for limiting the racks 15 is installed in the rectangular grooves 13. A locking block 16 is connected to the side wall of the rack 15 through a second spring 17. A slider 18 is fixedly connected to the upper end of each rack 15. A sliding groove 19 is formed at the bottom end of the locking block 16. The slider 18 slides in adjacent sliding grooves 19. A rotating rod 7 is fixedly connected to the upper end of the gear 14. The rotating rod 7 passes through the bone plate 1 and rotates. A second groove 10 and a third groove 11 are respectively formed in the bone tissue 2. The locking block 16 corresponds to the third groove 11. A fixing mechanism for fixing the rotating rod 7 is installed on the upper end of the bone plate 1. During operation, by inserting the bone nail 12 into the second groove 10 and pulling the pin 5 upward, the first spring 9 is compressed, thereby releasing the fixing of the rotating plate 3. Then, the rotating plate 3 is rotated, and the rotating plate 3 drives the rotating rod 7 to rotate. The rotating rod 7 drives the gear 14 to rotate. The gear 14 meshes with the racks 15 on both sides, thereby causing the two racks 15 to move in opposite directions. The racks 15 drive the locking block 16 to move, and the locking block 16 enters the third groove 11. After the locking block 16 contacts the inner wall of the third groove 11, the rotating rod 7 can still be rotated. At this time, the locking block 16 no longer moves, and the racks 15 continue to move, causing the second spring 17 to be compressed, thereby causing the locking block 16 to exert a squeezing force on the inner wall of the third groove 11, so that the locking block 16 achieves the fixing effect in the third groove 11.

[0026] like Figure 4 As shown, the limiting mechanism includes two sliding plates 20, each of which is fixedly mounted on the sidewall of two racks 15. The rectangular groove 13 has a sliding track 21 on its inner wall, allowing the sliding plate 20 to slide within the adjacent sliding track 21. During operation, the racks 15 move in opposite directions, causing the sliding plate 20 to slide within the sliding track 21. The sidewall of the sliding track 21 limits the sliding plate 20, preventing it from deviating during movement. This structure allows the racks 15 to move along a preset path, ensuring that the racks 15 and gears 14 are always engaged, thus enabling the bone tissue 2 and bone screw 12 to be successfully fixed.

[0027] like Figure 1 and Figure 2As shown, the fixing mechanism includes a rotating plate 3 and a pin 5. The rotating plate 3 is fixedly installed on the upper end of the rotating rod 7, and the pin 5 is slidably installed on the rotating plate 3, passing through the rotating plate 3. The upper end of the bone plate 1 has four insertion holes 6, each corresponding to the pin 5. A reset mechanism for resetting the pin 5 is installed inside the rotating plate 3. During operation, pulling the pin 5 upward causes it to move out of the insertion hole 6, thereby allowing the rotating plate 3 to drive the rotating rod 7 to rotate. When the pin 5 is released, the compressed first spring 9 resets, automatically entering another insertion hole 6, so that the rotating plate 3 achieves the fixing effect again. Through the above structure, the rotating plate 3 can be fixed, avoiding loosening caused by external force or vibration, and improving the long-term stability of the implant.

[0028] like Figure 1 and Figure 2 As shown, the upper end of the pin 5 is provided with an anti-slip sleeve 4. Through the above structure, the anti-slip sleeve 4 increases the friction at the upper end of the pin 5, making it easier for the operator to apply force when pulling the pin, especially when wearing gloves or with wet hands, making the operation more precise and reducing the risk of slippage or misoperation.

[0029] like Figure 2 As shown, the reset mechanism includes a first spring 9, a first groove 8 is formed in the rotating plate 3, the pin 5 slides in the first groove 8, one end of the first spring 9 is fixedly installed on the inner upper wall of the first groove 8, and the other end of the first spring 9 is fixedly installed on the side wall of the pin 5. During operation, when the pin 5 is pulled, the first spring 9 is compressed; when the pin 5 is released, the first spring 9 resets. Through the above structure, the pin 5 can always be engaged with the insertion hole 6 without external force, thereby preventing the rotating plate 3 from driving the rotating rod 7 to rotate spontaneously, so that the locking block 16 remains stable in the third groove 11, and avoids poor fixation effect between the bone tissue 2 and the bone nail 12.

[0030] like Figure 4 and Figure 5 As shown, the sidewalls of the card block 16 have a soft surface. This structure reduces pressure and friction on surrounding tissues, thereby minimizing tissue damage during surgery.

[0031] like Figure 5 As shown, the slider 18 is installed on the upper end of the rack 15 near the locking block 16. During operation, when the locking block 16 is stationary while the rack 15 continues to move, the slider 18 slides within the groove 19. Through this structure, the inner wall of the groove 19 limits the slider 18, preventing accidental movement or displacement and improving safety during surgery or treatment.

[0032] Working principle: By inserting the bone nail 12 into the second groove 10 and pulling the pin 5 upward, the first spring 9 is compressed, thereby releasing the fixing of the rotating plate 3. Then, the rotating plate 3 is rotated, which drives the rotating rod 7 to rotate. The rotating rod 7 drives the gear 14 to rotate. The gear 14 meshes with the racks 15 on both sides, causing the two racks 15 to move in opposite directions. The racks 15 drive the locking block 16 to move, and the locking block 16 enters the third groove 11. After the locking block 16 contacts the inner wall of the third groove 11, the rotating rod 7 can continue to rotate. At this time, the locking block 16 stops moving, and the racks 15 continue to move, causing the second spring 17 to be compressed. This causes the locking block 16 to exert a squeezing force on the inner wall of the third groove 11, thereby achieving the fixing effect of the locking block 16 in the third groove 11.

[0033] After the bone tissue 2 and bone nail 12 are fixed, the upward-pulling pin 5 is released. Under the action of the compressed first spring 9, the pin 5 automatically resets and moves downward. The pin 5 is inserted into another socket 6, thereby achieving the effect of fixing the rotating plate 3 and preventing the rotating plate 3 from spontaneously driving the rotating rod 7 to rotate, so that the locking block 16 can be stabilized in the third groove 11.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An implant fixation device, characterized in that: The device includes a bone plate (1) and bone tissue (2). A bone screw (12) is fixedly connected to the lower end of the bone plate (1). A gear (14) is rotatably connected to the bottom end of the bone screw (12). Rectangular grooves (13) are formed on the opposite side walls of the bone screw (12). Two racks (15) are slidably connected to the bottom end of the bone screw (12). The racks (15) mesh with the gears (14). A limiting mechanism for limiting the racks (15) is installed in the rectangular grooves (13). A locking block (16) is connected to the side wall of the racks (15) through a second spring (17). Each rack (15) is fixedly connected to a slider (18) at its upper end. The bottom of the locking block (16) is provided with a sliding groove (19). The slider (18) slides in the adjacent sliding groove (19). The gear (14) is fixedly connected to a rotating rod (7) at its upper end. The rotating rod (7) passes through the rotating bone plate (1). The bone tissue (2) is provided with a second groove (10) and a third groove (11) respectively. The locking block (16) corresponds to the third groove (11). The upper end of the bone plate (1) is equipped with a fixing mechanism for fixing the rotating rod (7).

2. The implant fixation device according to claim 1, characterized in that: The limiting mechanism includes two sliding plates (20), each of which is fixedly installed on the side wall of two racks (15). The rectangular groove (13) has a slide rail (21) on its inner wall, and the sliding plate (20) slides in the adjacent slide rail (21).

3. The implant fixation device according to claim 1, characterized in that: The fixing mechanism includes a rotating plate (3) and a pin (5). The rotating plate (3) is fixedly installed on the upper end of the rotating rod (7). The pin (5) is slidably installed on the rotating plate (3) and passes through the rotating plate (3). The upper end of the bone plate (1) is provided with four insertion holes (6), each of the insertion holes (6) corresponding to the pin (5). A reset mechanism for resetting the pin (5) is installed inside the rotating plate (3).

4. The implant fixation device according to claim 3, characterized in that: The upper end of the pin (5) is provided with an anti-slip sleeve (4).

5. The implant fixation device according to claim 3, characterized in that: The reset mechanism includes a first spring (9), a first groove (8) is provided in the rotating plate (3), the pin (5) slides in the first groove (8), one end of the first spring (9) is fixedly installed on the inner upper wall of the first groove (8), and the other end of the first spring (9) is fixedly installed on the side wall of the pin (5).

6. The implant fixation device according to claim 1, characterized in that: The sidewalls of the card block (16) are soft surfaces.

7. The implant fixation device according to claim 1, characterized in that: The slider (18) is installed on the upper end of the rack (15) near the block (16).

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