Adjustable cervical vertebra screw angle positioning device

Abstract

The utility model discloses an adjustable cervical vertebra screw angle positioning device, which comprises a positioning seat and a cervical vertebra screw, a movable butt joint mechanism is arranged in the positioning seat, the movable butt joint mechanism comprises an annular sliding rod and a semi-annular sliding rod, the annular sliding rod is fixedly connected in the positioning seat through an arranged lifting lug, and the semi-annular sliding rod is fixedly connected in the positioning seat through the lifting lug. The cervical vertebra positioning device has the advantages that firstly, the positioning seat and the cervical vertebra screw can be in butt joint through the movable butt joint mechanism, the positioning seat and the cervical vertebra screw can be rotationally adjusted, the positioning seat and the cervical vertebra screw can be in butt joint through the movable butt joint mechanism, and the cervical vertebra screw can be in butt joint through the movable butt joint mechanism. Then, the rotating adjusting positioning seat and the cervical vertebra screw can be positioned and fixed through the arranged extrusion seat, finally, the multiple positioning seats can be conveniently connected through the arranged connecting mechanism, the structure is reasonable, and installation and adjustment are convenient.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an adjustable cervical screw angle positioning device. Background Technology

[0002] Because the cervical vertebrae have smaller segmental structural features and the pedicles are not as prominent as those in the thoracic and lumbar vertebrae, a cervical screw with a smaller base volume and a larger diameter ball head screw is needed to achieve a firm anchoring effect on the cervical spine.

[0003] Existing cervical screws have certain drawbacks. When fixing the cervical spine with screws, the screws can be driven in at various angles, but existing cervical screws cannot be adjusted in multiple directions, making it difficult to fix the cervical screws. Therefore, there is an urgent need for an adjustable cervical screw angle positioning device to solve the above problems. Utility Model Content

[0004] To solve the above problems, this utility model provides an adjustable cervical screw angle positioning device, which is achieved through the following technical solution.

[0005] An adjustable cervical screw angle positioning device includes a positioning seat and a cervical screw. The positioning seat has an internal movable docking mechanism, which includes an annular slide rod and a semi-annular slide rod. The annular slide rod is fixed inside the positioning seat via a lug. The semi-annular slide rod is movably connected to the annular slide rod via a first movable seat. A second movable seat is movably connected to the semi-annular slide rod. A positioning ball and a connecting seat are fixedly connected to the outer surface of the second movable seat. A cross-shaped positioning groove is formed at the bottom of the connecting seat. One end of the cervical screw is fixedly connected to the cross-shaped positioning seat, which has a first hexagonal groove. A positioning mechanism inside the positioning seat presses against the positioning ball. The positioning mechanism includes a pressing seat, which has a second hexagonal groove at its top and a protrusion fixedly connected to its bottom. The protrusion has a hemispherical groove at its bottom.

[0006] Furthermore, the cross-shaped positioning seat is embedded and connected to the bottom of the connecting seat through a cross-shaped positioning groove. The other end of the cervical screw is provided with a connecting ring. The connecting ring is movably connected to the cervical screw through a provided perforation, and the connecting ring is threadedly engaged with the connecting seat. The cross-shaped positioning seat is pressed between the connecting seat and the connecting ring.

[0007] Furthermore, the positioning ball and the connecting seat are located on the same straight line, and the center of the positioning ball is concentric with the center of the semi-circular slide rod.

[0008] Furthermore, the second movable seat has an angular range of 0-160°, and the semi-annular slide bar has an angular range of 0-160°.

[0009] Furthermore, the extrusion seat and the positioning seat are threaded together.

[0010] Furthermore, the positioning ball is engaged with the protrusion through a hemispherical groove, and both the inner wall of the hemispherical groove and the outer surface of the positioning ball are provided with anti-slip marks.

[0011] Furthermore, it also includes a connecting mechanism, which includes a connecting rod that passes through a connecting slot onto the positioning seat, and a limiting block fixed on the connecting rod is embedded in a pressing seat inside the positioning seat.

[0012] The beneficial effects of this utility model are that, during the operation of this device, the positioning seat and the cervical screw are first connected through the set movable docking mechanism, and the positioning seat and the cervical screw can be rotated and adjusted. Then, the set compression seat can fix the rotating adjustment positioning seat and the cervical screw in position. Finally, the set connecting mechanism can facilitate the connection between several positioning seats. The structure is reasonable and convenient for installation and adjustment. Attached Figure Description

[0013] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 : A schematic diagram of the structure of an adjustable cervical screw angle positioning device according to this utility model;

[0015] Figure 2 : A schematic diagram of the structure of the cervical screw and compression seat of this utility model;

[0016] Figure 3 : A schematic diagram of the connection between the cervical screw and the connecting ring of this utility model;

[0017] Figure 4 : A schematic diagram of the structure of the protrusion of this utility model;

[0018] Figure 5 : A schematic diagram of the connecting ring structure of this utility model;

[0019] Figure 6 : Schematic diagram of the connection structure of the annular slide bar and the semi-annular slide bar of this utility model.

[0020] The attached figures are labeled as follows:

[0021] 1. Positioning seat; 11. Connecting slot;

[0022] 2. Cervical screw; 21. Cross-shaped locating seat; 211. First hexagonal groove;

[0023] 3. Circular slide bar; 31. Lifting lug;

[0024] 4. Semi-circular slide bar; 41. First movable seat; 42. Second movable seat; 43. Positioning ball; 44. Connecting seat; 441. Cross positioning groove;

[0025] 5. Connecting ring; 51. Perforation;

[0026] 6. Extrusion seat; 61. Second hexagonal groove; 62. Boss; 621. Hemispherical groove;

[0027] 7. Connecting rod; 71. Limiting block. Detailed Implementation

[0028] 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.

[0029] like Figure 1-6 As shown, the present invention has the following specific embodiments.

[0030] Example:

[0031] An adjustable cervical screw angle positioning device includes a positioning seat 1 and a cervical screw 2. The positioning seat 1 has a movable docking mechanism inside, which includes an annular slide rod 3 and a semi-annular slide rod 4. The annular slide rod 3 is fixed inside the positioning seat 1 by a lug 31. The semi-annular slide rod 4 is movably connected to the annular slide rod 3 by a first movable seat 41. A second movable seat 42 is movably connected to the semi-annular slide rod 4. A positioning ball 43 and a connecting seat 44 are fixedly connected to the outer surface of the second movable seat 42. A cross positioning groove 441 is opened at the bottom of the connecting seat 44. One end of the cervical screw 2 is fixedly connected to a cross positioning seat 21. A first hexagonal groove 211 is opened on the cross positioning seat 21. A positioning mechanism inside the positioning seat 1 presses against the positioning ball 43. The positioning mechanism includes a pressing seat 6. A second hexagonal groove 61 is opened at the top of the pressing seat 6. A boss 62 is fixedly connected to the bottom of the pressing seat 6. A hemispherical groove 621 is opened at the bottom of the boss 62.

[0032] Specifically, the cross-shaped positioning seat 21 is embedded and connected to the bottom of the connecting seat 44 through the cross-shaped positioning groove 441. The other end of the cervical screw 2 is provided with a connecting ring 5. The connecting ring 5 is movably connected to the cervical screw 2 through the provided through hole 51, and the connecting ring 5 is threadedly engaged with the connecting seat 44. The cross-shaped positioning seat 21 is pressed between the connecting seat 44 and the connecting ring 5. The cervical screw 2 can be embedded into the cross-shaped positioning groove 441 through the cross-shaped positioning seat 21, and the connecting ring 5 can fix the cross-shaped positioning seat 21 and the connecting seat 44.

[0033] Specifically, the positioning ball 43 and the connecting seat 44 are on the same straight line, and the center of the positioning ball 43 is concentric with the center of the semi-circular slide bar 4, so that the positioning ball 43 is always located at the center of the semi-circular slide bar 4 during the adjustment process of the second movable seat 42 driving the cervical screw 2.

[0034] Specifically, the second movable seat 42 has an angular range of 0-160°, and the semi-circular slide bar 4 has an angular range of 0-160°, which enables the positioning seat 1 to be adjusted horizontally and vertically by 0-160°.

[0035] Specifically, the extrusion seat 6 and the positioning seat 1 are threaded together, and the threaded connection between the extrusion seat 6 and the positioning seat 1 enables tightening and extrusion.

[0036] Specifically, the positioning ball 43 is engaged with the protrusion 62 through the hemispherical groove 621, and both the inner wall of the hemispherical groove 621 and the outer surface of the positioning ball 43 are provided with anti-slip marks.

[0037] Specifically, it also includes a connecting mechanism, which includes a connecting rod 7. The connecting rod 7 passes through the connecting slot 11 and is inserted into the positioning seat 1. The limiting block 71 fixed on the connecting rod 7 is embedded in the pressing seat 6 inside the positioning seat 1. The connecting rod 7 of the connecting mechanism can pass through the connecting slot 11 to connect several positioning seats 1. At the same time, the limiting block 71 fixed on the connecting rod 7 can limit and press inside the positioning seat 1.

[0038] The working principle of this utility model:

[0039] In use, firstly, the cervical screw 2 is inserted into the cross-shaped positioning groove 441 through the cross-shaped positioning seat 21. Then, the connecting ring 5 is placed on the cervical screw 2, and the connecting ring 5 is rotated and tightened between the cross-shaped positioning seat 21 and the connecting seat 441, thereby fixing the cervical screw 2 to the positioning seat 1. Then, the cervical screw 2 is fixed on the cervical spine. Then, by horizontally rotating the positioning seat 1, the connected annular slide rod 3 is driven to slide on the two first movable seats 41, thereby adjusting the horizontal rotation of the positioning seat 1. Then, by vertically rotating the positioning seat 1, the semi-annular slide rod 4 connected to the annular slide rod 3 is moved to the second movable seat 441. 2. Slide the screw on the upper part of the screw to adjust the longitudinal rotation of the positioning seat 1, so as to facilitate the rotation of the positioning seat 1. After the positioning seat 1 is adjusted to fit the cervical spine, the compression seat 6 is rotated and tightened inside the positioning seat 1. At this time, the protrusion 62 fixed on the compression seat 6 is sleeved on the positioning ball 43 through the hemispherical groove 621, so that the protrusion 62 presses and fixes the positioning ball 43. Finally, several positioning seats 1 are connected by connecting rods 7 inserted through the connecting groove 11. The limiting block 71 fixed on the connecting rod 7 is embedded in the positioning seat 1 for limiting. The structure is reasonable and facilitates the rotation adjustment and fixation between the cervical spine screw 2 and the positioning seat 1.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An adjustable cervical screw angle positioning device, comprising a positioning seat (1) and a cervical screw (2), characterized in that: The positioning seat (1) is equipped with a movable docking mechanism, which includes an annular slide rod (3) and a semi-annular slide rod (4). The annular slide rod (3) is fixed inside the positioning seat (1) by a lug (31). The semi-annular slide rod (4) is movably connected to the annular slide rod (3) by a first movable seat (41). A second movable seat (42) is movably connected to the semi-annular slide rod (4). A positioning ball (43) and a connecting seat (44) are fixedly connected to the outer surface of the second movable seat (42). (44) has a cross-shaped positioning groove (441) at the bottom. One end of the cervical screw (2) is fixedly connected to a cross-shaped positioning seat (21). The cross-shaped positioning seat (21) has a first hexagonal groove (211). The positioning mechanism inside the positioning seat (1) presses against the positioning ball (43). The positioning mechanism includes a pressing seat (6). The top of the pressing seat (6) has a second hexagonal groove (61). The bottom of the pressing seat (6) is fixedly connected to a boss (62). The bottom of the boss (62) has a hemispherical groove (621).

2. The adjustable cervical screw angle positioning device according to claim 1, characterized in that: The cross-shaped positioning seat (21) is embedded and connected to the bottom of the connecting seat (44) through the cross-shaped positioning groove (441). The other end of the cervical screw (2) is provided with a connecting ring (5). The connecting ring (5) is movably connected to the cervical screw (2) through the provided through hole (51). The connecting ring (5) is threadedly engaged with the connecting seat (44), and the cross-shaped positioning seat (21) is pressed between the connecting seat (44) and the connecting ring (5).

3. The adjustable cervical screw angle positioning device according to claim 1, characterized in that: The positioning ball (43) and the connecting seat (44) are located on the same straight line, and the center of the positioning ball (43) is concentric with the center of the semi-circular slide bar (4).

4. The adjustable cervical screw angle positioning device according to claim 1, characterized in that: The second movable seat (42) has an angular range of 0-160°, and the semi-annular slide bar (4) has an angular range of 0-160°.

5. The adjustable cervical screw angle positioning device according to claim 1, characterized in that: The extrusion seat (6) and the positioning seat (1) are threaded together.

6. The adjustable cervical screw angle positioning device according to claim 1, characterized in that: The positioning ball (43) is embedded in the boss (62) through the hemispherical groove (621), and the inner wall of the hemispherical groove (621) and the outer surface of the positioning ball (43) are provided with anti-slip marks.

7. The adjustable cervical screw angle positioning device according to claim 1, characterized in that: It also includes a connecting mechanism, which includes a connecting rod (7), which is inserted into the positioning seat (1) through a connecting slot (11), and a limiting block (71) fixed on the connecting rod (7) is embedded in the pressing seat (6) inside the positioning seat (1).

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