Posterior spine fixing device
By designing structures such as arc-shaped connecting plates and limiting rods, the problem of positional deviation in traditional spinal fixation devices after long-term use has been solved, achieving stable connection and adjustment of the fixation rods and enhancing the stability of the spinal fixation device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU JINLU GRP MEDICAL DEVICE
- Filing Date
- 2025-02-28
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional posterior spinal multi-point fixation devices are prone to positional deviation due to daily activities after prolonged use, lacking effective connection stability.
A posterior spinal fixation device was designed. Through the arc-shaped connecting plate, limiting rod, connecting rod and extension rod in the connecting assembly, the distance between the fixation rods can be adjusted and the positioning connection can be achieved, thereby enhancing stability.
It improves the stability of the fixing rod, prevents jamming during adjustment, and enhances the stability and fixing effect of the connection.
Smart Images
Figure CN224220212U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, and in particular to a posterior spinal fixation device. Background Technology
[0002] A newborn baby has 32-33 vertebrae. An adult spine consists of 26 vertebrae connected by ligaments, joints and intervertebral discs. The upper end of the spine supports the skull, the lower end connects to the hip bones, the middle part attaches to the ribs, and it serves as the posterior wall of the thoracic cavity, abdominal cavity and pelvic cavity. The spine has the functions of supporting the trunk, protecting the internal organs, protecting the spinal cord and enabling movement. A longitudinal spinal canal is formed inside the spine from top to bottom, containing the spinal cord.
[0003] Traditional posterior spinal fixation devices mainly fix the position of the screws by inserting screws into the vertebrae and then using connecting rods to connect the screws. Since the screws on different sides of the spine are not fixedly connected to each other during fixation, the fixation position may deviate due to the daily activities of the person whose spine is fixed when the fixation time is too long. Therefore, there is a need to provide a posterior spinal fixation device to solve the above problems. Utility Model Content
[0004] The main objective of this invention is to provide a posterior spinal fixation device that can effectively solve the problems in the prior art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A posterior spinal fixation device includes a fixation component, wherein a connecting component is provided on the side of the fixation component;
[0007] The fixing component includes a fixing rod, a support base is provided on the outside of the fixing rod, a positioning screw is provided in the middle of the bottom of the support base, a nut is provided on the top of the positioning screw, an insertion hole is provided in the middle of the side wall of the support base, and an installation groove is provided on the side of the support base.
[0008] The connecting assembly includes an arc-shaped connecting plate, a mounting frame on the side of the arc-shaped connecting plate, a limiting rod in the middle of the mounting frame, a connecting rod outside the limiting rod, a contraction cavity in the middle of the connecting rod, an extension rod inside the contraction cavity, a positioning bolt at the top of one end of the connecting rod, and a hexagonal groove at the top of the positioning bolt.
[0009] Preferably, a support base is sleeved on the outside of the fixing rod, and an insertion hole is opened in the middle of the side wall of the support base. The insertion hole passes through both sides of the support base, and the fixing rod is inserted into the insertion hole in the middle of the support base, and the fixing rod passes through both sides of the support base.
[0010] Preferably, the bottom of the support base is connected to a positioning screw by a thread, and the positioning screw penetrates the bottom of the support base. The top of the positioning screw is fixedly connected to a nut, and the top of the nut contacts the inner wall of the bottom of the support base. The nut is located below the fixing rod. The side of the support base is provided with an installation groove, and there are two installation grooves, which are symmetrically distributed on both sides of the support base. The installation grooves are located on the side of the fixing rod.
[0011] Preferably, the mounting groove is slidably connected to a mounting frame, and an arc-shaped connecting plate is fixedly connected to the side of the mounting frame near the inside of the support base. The arc-shaped connecting plate is slidably connected to the inside of the support base, and the outer wall of the arc-shaped connecting plate is slidably connected to the inner wall of the support base. A groove is provided in the middle of the side of the mounting frame away from the arc-shaped connecting plate.
[0012] Preferably, a connecting rod is inserted into the groove on the side of the mounting frame, and a limiting rod is installed at the end of the connecting rod near the mounting frame. The limiting rod passes through the connecting rod, and the top and bottom ends of the limiting rod are connected to the top and bottom of the mounting frame. An extension rod is slidably connected to the middle of the connecting rod. There are two mounting frames, which are symmetrically distributed at the ends of the connecting rod and the extension rod away from the connecting rod, respectively, and the limiting rod and the mounting frame are correspondingly set.
[0013] Preferably, a shrinkage cavity is provided in the middle of the end of the connecting rod away from the mounting frame, and the shrinkage cavity passes through the middle of the end of the connecting rod away from the mounting frame. The extension rod is slidably connected inside the shrinkage cavity. A positioning bolt is threadedly connected to the top of the end of the connecting rod away from the mounting frame, and the bottom end of the positioning bolt passes through the connecting rod and is connected to the extension rod. A hexagonal groove is provided in the middle of the top of the positioning bolt.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] In this invention, the distance between two fixed rods is adjusted by a connecting component. An extension rod is inserted into the connecting rod to connect the two fixed rods. Inserting the extension rod into the connecting rod allows for adjustment of the distance between the two fixed rods, improving the stability of the fixed rods. Positioning bolts are used to position the connecting rod and the extension rod, increasing connection stability. Furthermore, the connecting rod and the extension rod are connected to the support base via a mounting frame and a limiting rod, respectively, preventing jamming during adjustment and ensuring usability. Attached Figure Description
[0016] Figure 1 This is a first-person perspective perspective view of the entire device of this utility model;
[0017] Figure 2 This is a second-view perspective perspective view of the entire device of this utility model;
[0018] Figure 3 This is a structural schematic diagram of the fixing component of this utility model;
[0019] Figure 4 This is a schematic diagram of the structure of the connecting component of this utility model.
[0020] In the diagram: 1. Fixing component; 2. Fixing rod; 3. Positioning screw; 4. Nut; 5. Support base; 6. Insertion hole; 7. Mounting slide; 8. Connecting component; 9. Arc-shaped connecting plate; 10. Mounting frame; 11. Limiting rod; 12. Connecting rod; 13. Contraction chamber; 14. Extension rod; 15. Hexagonal groove; 16. Positioning bolt. 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 posterior spinal fixation device includes a fixation component 1, and a connecting component 8 is provided on the side of the fixation component 1.
[0023] The fixing component 1 includes a fixing rod 2, a support base 5 is provided on the outside of the fixing rod 2, and a positioning screw 3 is provided in the middle of the bottom of the support base 5. A nut 4 is provided on the top of the positioning screw 3. An insertion hole 6 is provided in the middle of the side wall of the support base 5, and an installation groove 7 is provided on the side of the support base 5. The fixing rod 2 is sleeved on the outside of the support base 5, and the insertion hole 6 is provided in the middle of the side wall of the support base 5. The insertion hole 6 passes through both sides of the support base 5. The fixing rod 2 is inserted into the insertion hole 6 in the middle of the support base 5, and the fixing rod 2 passes through both sides of the support base 5. The bottom of the support base 5 is connected to the positioning screw 3 by thread, and the positioning screw 3 passes through the bottom of the support base 5. A nut 4 is fixedly connected to the top of the positioning screw 3, and the top of the nut 4 contacts the bottom inner wall of the support base 5. The nut 4 is located below the fixing rod 2. There are two installation grooves 7 on the side of the support base 5, which are symmetrically distributed on both sides of the support base 5. The installation grooves 7 are located on the side of the fixing rod 2.
[0024] Please see Figure 1 , Figure 2 , Figure 4As shown, the connecting assembly 8 includes an arc-shaped connecting plate 9. A mounting frame 10 is provided on the side of the arc-shaped connecting plate 9. A limiting rod 11 is provided in the middle of the mounting frame 10, and a connecting rod 12 is provided outside the limiting rod 11. A contraction cavity 13 is provided in the middle of the connecting rod 12, and an extension rod 14 is provided inside the contraction cavity 13. A positioning bolt 16 is provided at the top of one end of the connecting rod 12, and a hexagonal groove 15 is provided at the top of the positioning bolt 16. The mounting frame 10 is slidably connected inside the mounting slide 7, and the arc-shaped connecting plate 9 is fixedly connected to the side of the mounting frame 10 closest to the inside of the support base 5. The connecting plate 9 is slidably connected to the inside of the support base 5. The outer wall of the arc-shaped connecting plate 9 is slidably connected to the inner wall of the support base 5. A groove is provided in the middle of the side of the mounting frame 10 away from the arc-shaped connecting plate 9. A connecting rod 12 is inserted into the groove on the side of the mounting frame 10. A limiting rod 11 is installed at the end of the connecting rod 12 near the mounting frame 10. The limiting rod 11 passes through the connecting rod 12, and the top and bottom ends of the limiting rod 11 are connected to the top and bottom of the mounting frame 10. An extension rod 14 is slidably connected to the middle of the connecting rod 12. There are two mounting frames 10, which are symmetrically distributed on the side of the connecting rod 12 away from the extension rod 14. One end of the extension rod 14 is away from the end of the connecting rod 12, and the limiting rod 11 is correspondingly set with the mounting frame 10. A shrinkage cavity 13 is opened in the middle of the end of the connecting rod 12 away from the mounting frame 10, and the shrinkage cavity 13 passes through the middle of the end of the connecting rod 12 away from the mounting frame 10. The extension rod 14 is slidably connected inside the shrinkage cavity 13. The top of the end of the connecting rod 12 away from the mounting frame 10 is connected to a positioning bolt 16 by a thread, and the bottom end of the positioning bolt 16 passes through the connecting rod 12 and is connected to the extension rod 14. A hexagonal groove 15 is opened in the middle of the top of the positioning bolt 16. 8. The distance between the two fixed rods 2 can be adjusted by inserting the extension rod 14 into the connecting rod 12, thereby connecting the two fixed rods 2. Inserting the extension rod 14 into the connecting rod 12 allows for adjustment of the distance between the two fixed rods 2, improving the stability of the fixed rods 2. The positioning bolt 16 is used to position the connecting rod 12 and the extension rod 14, increasing the stability of the connection. The connecting rod 12 and the extension rod 14 are respectively connected to the support base 5 through the mounting frame 10 and the limiting rod 11 to prevent jamming during adjustment and affecting use.
[0025] It should be noted that this utility model is a posterior spinal fixation device. In use, the positioning screw 3 passes through the bottom of the support base 5 and is installed at the required position on the spine. The nut 4 secures the positioning screw 3 to the support base 5. After the positioning screw 3 is fixed, the fixing rod 2 passes through the insertion hole 6 in the middle of the support base 5, connecting multiple support bases 5. The length of the fixing rod 2 is adjusted to fix the spine. Then, the arc-shaped connecting plate 9 drives the mounting frame 10 to slide into the mounting groove 7 in the middle of the side wall of the support base 5, allowing the mounting frame 10 to slide against the mounting groove 7. One end of the mounting frame 10 is connected via... The limiting rod 11 is equipped with a connecting rod 12, and an extension rod 14 is slidably connected to the middle of the connecting rod 12. Pulling the extension rod 14 causes it to slide in the middle of the connecting rod 12. The mounting frame 10 of the extension rod 14 away from the connecting rod 12 is connected to the arc-shaped connecting plate 9 inside the support seat 5 on the other side, thereby achieving a limiting connection between the two fixed rods 2. Adjusting the length between the connecting rod 12 and the extension rod 14 allows for tightening of the fixed rod 2, improving the stability of the fixed rod 2. Rotating the positioning bolt 16 connects the connecting rod 12 and the extension rod 14, improving the stability of the connecting rod 12 and the extension rod 14.
[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 posterior spinal fixation device, comprising a fixation assembly (1), characterized in that: The fixing component (1) is provided with a connecting component (8) on its side; The fixing component (1) includes a fixing rod (2), a support base (5) is provided on the outside of the fixing rod (2), and a positioning screw (3) is provided in the middle of the bottom of the support base (5). A nut (4) is provided on the top of the positioning screw (3). A plug hole (6) is provided in the middle of the side wall of the support base (5), and an installation groove (7) is provided on the side of the support base (5). The connecting assembly (8) includes an arc-shaped connecting plate (9), a mounting frame (10) is provided on the side of the arc-shaped connecting plate (9), a limiting rod (11) is provided in the middle of the mounting frame (10), and a connecting rod (12) is provided outside the limiting rod (11). A shrinkage cavity (13) is provided in the middle of the connecting rod (12), and an extension rod (14) is provided inside the shrinkage cavity (13). A positioning bolt (16) is provided at the top of one end of the connecting rod (12), and a hexagonal groove (15) is provided at the top of the positioning bolt (16).
2. The posterior spinal fixation device according to claim 1, characterized in that: The fixing rod (2) is fitted with a support base (5), and the support base (5) has a insertion hole (6) in the middle of its side wall. The insertion hole (6) passes through both sides of the support base (5). The fixing rod (2) is inserted into the insertion hole (6) in the middle of the support base (5), and the fixing rod (2) passes through both sides of the support base (5).
3. The posterior spinal fixation device according to claim 2, characterized in that: The bottom of the support base (5) is connected to a positioning screw (3) by a thread, and the positioning screw (3) penetrates the bottom of the support base (5). The top of the positioning screw (3) is fixedly connected to a nut (4), and the top of the nut (4) contacts the bottom inner wall of the support base (5). The nut (4) is located below the fixing rod (2). The side of the support base (5) is provided with an installation groove (7), and there are two installation grooves (7), which are symmetrically distributed on both sides of the support base (5). The installation grooves (7) are located on the side of the fixing rod (2).
4. The posterior spinal fixation device according to claim 3, characterized in that: The mounting groove (7) is slidably connected to the mounting frame (10), and the mounting frame (10) is fixedly connected to the side of the support base (5) with an arc-shaped connecting plate (9). The arc-shaped connecting plate (9) is slidably connected to the inside of the support base (5), and the outer wall of the arc-shaped connecting plate (9) is slidably connected to the inner wall of the support base (5). A groove is provided in the middle of the side of the mounting frame (10) away from the arc-shaped connecting plate (9).
5. A posterior spinal fixation device according to claim 4, characterized in that: A connecting rod (12) is inserted into the groove on the side of the mounting frame (10), and a limiting rod (11) is installed at the end of the connecting rod (12) near the mounting frame (10). The limiting rod (11) passes through the connecting rod (12), and the top and bottom ends of the limiting rod (11) are connected to the top and bottom of the mounting frame (10). An extension rod (14) is slidably connected in the middle of the connecting rod (12). There are two mounting frames (10), which are symmetrically distributed at the end of the connecting rod (12) away from the extension rod (14) and the end of the extension rod (14) away from the connecting rod (12), respectively. The limiting rod (11) is set correspondingly to the mounting frame (10).
6. A posterior spinal fixation device according to claim 5, characterized in that: A shrinkage cavity (13) is provided in the middle of the end of the connecting rod (12) away from the mounting frame (10), and the shrinkage cavity (13) passes through the middle of the end of the connecting rod (12) away from the mounting frame (10). The extension rod (14) is slidably connected inside the shrinkage cavity (13). A positioning bolt (16) is threadedly connected to the top of the end of the connecting rod (12) away from the mounting frame (10), and the bottom end of the positioning bolt (16) passes through the connecting rod (12) and is connected to the extension rod (14). A hexagonal groove (15) is provided in the middle of the top of the positioning bolt (16).