Minimally invasive long-tail spine internal fixation system

Abstract

The utility model discloses a minimally invasive long tail spine internal fixing system, which relates to the technical field of medical apparatus and instruments, and comprises a fixer main body, the top of the fixer main body is provided with a positioning component, the fixer main body comprises a fixing screw, the top of the fixing screw is provided with a mounting seat, the outside of the mounting seat is provided with an extension seat, and the extension seat is provided with a fixing component. A clamping groove is formed in the middle of the side wall of the extension seat, and a correcting rod is arranged in the middle of the clamping groove. According to the minimally invasive long-tail spine internal fixing system, positioning connection of the correcting rod is achieved through the arranged positioning assembly, the correcting rod is connected into the arc-shaped connecting base through the arranged threaded rod, the arranged positioning block is inserted into the threaded rod, and when the threaded rod descends, the positioning block is driven to be clamped to the outer portion of the correcting rod, so that the correcting rod is fixed to the position of the correcting rod. The arc-shaped clamping groove in the bottom of the positioning block is arranged outside the correcting rod in a sleeving mode, limiting connection of the correcting rod is achieved, the correcting rod is prevented from deviating in the using process, and the using stability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a minimally invasive long tail spinal internal fixation system. Background Technology

[0002] Currently, spinal surgery methods are constantly evolving, and various spinal internal fixation devices have emerged. The popular posterior fixation system has seen rapid development and application due to its advantages such as simple surgical procedures. When using this system, with the injured vertebra as the center, pedicle screws are inserted forward (or in other corresponding positions and directions) at the root of the transverse process of the upper and lower vertebrae, at the intersection of the midpoint and the facet joint, to an appropriate depth. Then, a corrective rod or corrective plate is installed at the end of the pedicle screw along the direction of the spine.

[0003] After installation, the corrective rod needs to be positioned and connected to the pedicle screw. However, most existing positioning structures use screws to position and connect the corrective rod. After long-term use, the screws are prone to displacement, affecting the positioning effect. Therefore, a minimally invasive long tail spinal internal fixation system is needed to solve the above problems. Utility Model Content

[0004] The main objective of this invention is to provide a minimally invasive long tail spinal internal fixation system that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A minimally invasive long tail spinal internal fixation system includes a fixator body, and a positioning component is provided on the top of the fixator body;

[0007] The main body of the fixation device includes a fixing screw, a mounting base is provided on the top of the fixing screw, an extension base is provided on the outside of the mounting base, and a snap-fit ​​groove is provided in the middle of the side wall of the extension base, and a straightening rod is provided in the middle of the snap-fit ​​groove.

[0008] The positioning component includes an arc-shaped connecting seat, a threaded rod in the middle of the arc-shaped connecting seat, a nut at the top of the threaded rod, a hexagonal groove at the top of the nut, an installation groove in the middle of the threaded rod, a positioning block in the middle of the installation groove, an arc-shaped slot at the bottom of the positioning block, and a connecting block on the top outer wall of the positioning block.

[0009] Preferably, a mounting base is installed on the top of the fixing screw, and an extension base is sleeved on the outside of the mounting base. The fixing screw is movably connected to the extension base. A snap-fit ​​groove is opened in the middle of the side wall of the extension base, and there are two snap-fit ​​grooves, which are symmetrically distributed on the middle of the two sides of the extension base. A straightening rod is inserted into the middle of the snap-fit ​​groove, and the straightening rod passes through the two snap-fit ​​grooves.

[0010] Preferably, the extension seat is fixedly connected to an arc-shaped connecting seat in the middle, and there are two arc-shaped connecting seats, which are symmetrically distributed on both sides of the inside of the extension seat. The arc-shaped connecting seat is located at the end of the extension seat near the top, and a threaded groove is provided on the inner wall of the side of the arc-shaped connecting seat away from the extension seat.

[0011] Preferably, a threaded rod is installed in the middle of the arc-shaped connecting seat, and the threaded rod is connected to the arc-shaped connecting seat by a thread. The threaded rod passes through the arc-shaped connecting seat, and a nut is fixedly connected to the top of the threaded rod. The outer wall of the nut contacts the inner wall of the extension seat, and a hexagonal groove is provided in the middle of the top of the nut.

[0012] Preferably, the threaded rod has a mounting groove in the middle, and a connecting groove is formed on the inner wall of the mounting groove. There are three connecting grooves, which are evenly distributed on the inner wall of the mounting groove. The bottom end of the connecting groove penetrates the bottom of the threaded rod. The top of the mounting groove has an annular limiting groove, which is connected to the mounting groove. The annular limiting groove is also connected to the connecting groove.

[0013] Preferably, a connecting block is slidably connected inside the connecting groove, and the connecting block is correspondingly arranged with the connecting groove. A positioning block is fixedly connected to the side of the connecting block away from the connecting groove, and the positioning block is slidably connected inside the mounting groove. The outer wall of the positioning block is in contact with the inner wall of the mounting groove. An arc-shaped groove is opened in the middle of the bottom of the positioning block, and the arc-shaped groove is correspondingly arranged with the straightening rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this invention, a positioning component is used to position and connect the corrector bar. A threaded rod is connected inside the arc-shaped connecting seat, and a positioning block is inserted inside the threaded rod. When the threaded rod descends, it causes the positioning block to engage with the outside of the corrector bar, so that the arc-shaped groove at the bottom of the positioning block fits onto the outside of the corrector bar, thereby achieving a limiting connection of the corrector bar, preventing the corrector bar from shifting during use, and improving the stability of the device. Attached Figure Description

[0016] Figure 1 This is a first-person perspective perspective view of the entire device of this utility model;

[0017] Figure 2This is a second-view perspective perspective view of the entire device of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the main body of the fixture of this utility model;

[0019] Figure 4 This is a structural schematic diagram of the positioning component of this utility model.

[0020] In the diagram: 1. Fixing body; 2. Fixing screw; 3. Mounting base; 4. Extension base; 5. Snap-fit ​​groove; 6. Correcting rod; 7. Positioning component; 8. Arc-shaped connecting base; 9. Threaded rod; 10. Nut; 11. Hexagonal groove; 12. Mounting groove; 13. Positioning block; 14. Arc-shaped snap-fit ​​groove; 15. Connecting block; 16. Connecting slide; 17. Annular limiting groove. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figure 1 , Figure 2 , Figure 3 As shown, a minimally invasive long tail spinal internal fixation system includes a fixator body 1, and a positioning component 7 is provided on the top of the fixator body 1.

[0023] The main body 1 of the fixation device includes a fixing screw 2, a mounting base 3 is provided on the top of the fixing screw 2, an extension base 4 is provided on the outside of the mounting base 3, and a snap-fit ​​groove 5 is provided in the middle of the side wall of the extension base 4. A straightening rod 6 is provided in the middle of the snap-fit ​​groove 5. The fixing screw 2 is mounted on the top of the fixing screw 2, and the extension base 4 is sleeved on the outside of the mounting base 3. The fixing screw 2 is movably connected to the extension base 4. The side wall of the extension base 4 has a snap-fit ​​groove 5, and there are two snap-fit ​​grooves 5, which are symmetrically distributed on the middle of the two sides of the extension base 4. The straightening rod 6 is inserted into the middle of the snap-fit ​​groove 5, and the straightening rod 6 passes through the two snap-fit ​​grooves 5.

[0024] Please see Figure 1 , Figure 2 , Figure 4As shown, the positioning component 7 includes an arc-shaped connecting seat 8, a threaded rod 9 in the middle of the arc-shaped connecting seat 8, a nut 10 at the top of the threaded rod 9, a hexagonal groove 11 at the top of the nut 10, an installation groove 12 in the middle of the threaded rod 9, a positioning block 13 in the middle of the installation groove 12, an arc-shaped slot 14 at the bottom of the positioning block 13, and a connecting block 15 on the top outer wall of the positioning block 13. An arc-shaped connecting seat 8 is fixedly connected to the middle of the extension seat 4, and there are two arc-shaped connecting seats 8, symmetrically distributed on both sides of the inside of the extension seat 4. A threaded groove is provided on the inner wall of the arc-shaped connecting seat 8 on the side away from the extension seat 4 near the top of the extension seat 4. A threaded rod 9 is installed in the middle of the arc-shaped connecting seat 8, and the threaded rod 9 is threadedly connected to the arc-shaped connecting seat 8. The threaded rod 9 passes through the arc-shaped connecting seat 8, and a nut 10 is fixedly connected to the top of the threaded rod 9. The outer wall of the nut 10 contacts the inner wall of the extension seat 4, and a hexagonal groove 11 is opened in the middle of the top of the nut 10. An installation groove 12 is opened in the middle of the threaded rod 9, and a connecting slide groove 16 is opened on the inner wall of the installation groove 12. There are three connecting slide grooves 16, which are evenly distributed. The connecting slide 16 is distributed on the inner wall of the mounting groove 12, and its bottom end penetrates the bottom of the threaded rod 9. The top of the mounting groove 12 has an annular limiting groove 17, which is interconnected with the mounting groove 12 and the connecting slide 16. A connecting block 15 is slidably connected inside the connecting slide 16, and the connecting block 15 is correspondingly set with the connecting slide 16. A positioning block 13 is fixedly connected to the side of the connecting block 15 away from the connecting slide 16, and the positioning block 13 is slidably connected inside the mounting groove 12. The outer wall of the positioning block 13 is in contact with the inner wall of the mounting groove 12. The positioning block 13 has an arc-shaped groove 14 at the bottom center, which corresponds to the straightening rod 6. The positioning component 7 is used to position and connect the straightening rod 6. The threaded rod 9 is connected to the inside of the arc-shaped connecting seat 8. The positioning block 13 is inserted into the inside of the threaded rod 9. When the threaded rod 9 descends, it drives the positioning block 13 to engage with the outside of the straightening rod 6, so that the arc-shaped groove 14 at the bottom of the positioning block 13 is fitted onto the outside of the straightening rod 6, thereby limiting the connection of the straightening rod 6, preventing the straightening rod 6 from shifting during use, and improving the stability of the device.

[0025] It should be noted that this utility model is a minimally invasive long tail spinal internal fixation system. In use, the fixing screw 2, mounting base 3, and extension base 4 are installed in the required positions. The corrective rod 6 is inserted through the locking groove 5 in the middle of the side wall of the extension base 4. The position of the extension base 4 is adjusted, aligning the connecting block 15 at the top of the positioning block 13 with the connecting groove 16 at the bottom of the threaded rod 9. The positioning block 13 is pushed, causing the connecting block 15 to slide inside the connecting groove 16. When the connecting block 15 slides to the top of the connecting groove 16, the positioning block 13 is rotated, causing the connecting block 15 to slide inside the annular limiting groove 17. Then, the threaded rod 9 is connected to the arc-shaped connecting base 8 via threads, positioning the positioning block 13 above the corrective rod 6. The arc-shaped groove 14 at the bottom of the positioning block 13 engages with the outside of the straightening rod 6, achieving the initial positioning connection of the straightening rod 6. Continuous rotation of the threaded rod 9 and the nut 10 causes the threaded rod 9 to descend to the position of the positioning block 13, and the positioning block 13 to press against the straightening rod 6, achieving the positioning connection of the straightening rod 6 and improving the stability of the straightening rod 6 in use. When the threaded rod 9 rotates in the middle of the arc-shaped connecting seat 8, the connecting block 15 at the top of the positioning block 13 rotates inside the annular limiting groove 17, reducing the impact on the positioning effect of the positioning block 13. Furthermore, the connecting block 15 is slidably connected inside the connecting groove 16 and the annular limiting groove 17, thereby facilitating the disassembly and replacement of the positioning block 13 and improving the ease of use of the device.

[0026] 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A minimally invasive long tail spinal internal fixation system comprising a holder body (1), characterized in that: The top of the fixator body (1) is provided with a positioning assembly (7); The fixator body (1) comprises a fixing screw (2), the top of the fixing screw (2) is provided with a mounting seat (3), the outside of the mounting seat (3) is provided with an extension seat (4), the middle of the side wall of the extension seat (4) is provided with a clamping groove (5), and the middle of the clamping groove (5) is provided with a correction rod (6). The positioning assembly (7) comprises an arc-shaped connecting seat (8), the middle of the arc-shaped connecting seat (8) is provided with a threaded rod (9), the top of the threaded rod (9) is provided with a nut (10), the top of the nut (10) is provided with a hexagonal groove (11), the middle of the threaded rod (9) is provided with a mounting groove (12), and the middle of the mounting groove (12) is provided with a positioning block (13), the bottom of the positioning block (13) is provided with an arc-shaped clamping groove (14), and the top outer wall of the positioning block (13) is provided with a connecting block (15).

2. The minimally invasive long-segment spinal internal fixation system according to claim 1, characterized in that: The top of the fixing screw (2) is provided with a mounting seat (3), and the outside of the mounting seat (3) is provided with an extension seat (4), the fixing screw (2) is movably connected with the extension seat (4), the middle of the side wall of the extension seat (4) is provided with a clamping groove (5), and the clamping groove (5) has two, which are symmetrically distributed in the middle of the two sides of the extension seat (4), the middle of the clamping groove (5) is inserted with a correction rod (6), and the correction rod (6) penetrates through the two clamping grooves (5).

3. The minimally invasive long tail spinal internal fixation system according to claim 1, characterized in that: The middle of the extension seat (4) is fixedly connected with an arc-shaped connecting seat (8), and the arc-shaped connecting seat (8) has two, which are symmetrically distributed on the inside of the two sides of the extension seat (4), the arc-shaped connecting seat (8) is located at one end of the extension seat (4) close to the top, and the inner wall of the side of the arc-shaped connecting seat (8) away from the extension seat (4) is provided with a threaded groove.

4. The minimally invasive long tail spinal internal fixation system according to claim 3, characterized in that: The middle of the arc-shaped connecting seat (8) is provided with a threaded rod (9), and the threaded rod (9) is connected with the arc-shaped connecting seat (8) through threads, the threaded rod (9) penetrates through the arc-shaped connecting seat (8), and the top of the threaded rod (9) is fixedly connected with a nut (10), the outer wall of the nut (10) is in contact with the inner wall of the extension seat (4), and the top of the nut (10) is provided with a hexagonal groove (11).

5. The minimally invasive long-segment spinal internal fixation system according to claim 4, characterized in that: The middle of the threaded rod (9) is provided with a mounting groove (12), and the inner wall of the mounting groove (12) is provided with a connecting sliding groove (16), the connecting sliding groove (16) has three, which are evenly distributed on the inner wall of the mounting groove (12), and the bottom end of the connecting sliding groove (16) penetrates through the bottom of the threaded rod (9), the top of the mounting groove (12) is provided with an annular limiting groove (17), and the annular limiting groove (17) and the mounting groove (12) are in communication, and the annular limiting groove (17) and the connecting sliding groove (16) are in communication.

6. The minimally invasive long-segment spinal internal fixation system according to claim 5, characterized in that: The inside of the connecting sliding groove (16) is slidably connected with a connecting block (15), and the connecting block (15) is correspondingly arranged with the connecting sliding groove (16), the side, away from the connecting sliding groove (16), of the connecting block (15) is fixedly connected with a positioning block (13), and the positioning block (13) is slidably connected in the inside of the mounting groove (12), the outer wall of the positioning block (13) is in contact with the inner wall of the mounting groove (12), and the bottom of the positioning block (13) is provided with an arc-shaped clamping groove (14) in the middle, and the arc-shaped clamping groove (14) is correspondingly arranged with the correcting rod (6).

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