Double-thread anti-disengagement internal fixing screw

Abstract

The utility model relates to the technical field of fixing screws and discloses a double-thread anti-disengagement internal fixing screw which comprises a first rod body, the bottom of the first rod body is connected with a transition rod, the bottom end of the transition rod is connected with a second rod body in an inserted mode, and a ball is embedded in the junction of the second rod body and the transition rod. And a first movable rod is inserted into the inner side of the second rod body, a second movable rod is arranged on the inner side of the first movable rod, and the bottom end of the second movable rod is movably connected with a first connecting shaft. According to the screw, through the arrangement of the first rod body, the transition rod, the second rod body, the balls and the like, when the screw is internally fixed by people, the second rod body can be in butt joint with one position, and the first rod body can be in butt joint with the second position, so that any end of the screw can be disassembled, and the screw can be conveniently disassembled. The other one of the first rod body and the second rod body does not move, so that in the subsequent installation work, only one end needs to be aligned with the threaded hole for connection work, and time is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixing screws, in particular to a double-threaded anti-slipping internal fixing screw. Background Art

[0002] With the development of science and technology and the progress of the times, screws have different shapes, but they have the same characteristics, which is to fix and connect. Screws are also called screws. They are tools that use the physics and mathematical principles of the inclined circular rotation and friction of objects to gradually fasten objects and parts. Screws are a general term for fasteners.

[0003] The threads on both sides of the outer wall of the existing internal fixing screws are arranged on the same rod body and have the same direction. When disassembling and assembling, it is a synchronous operation, which easily leads to the disassembly of the end that does not need to be disassembled or repaired, resulting in the subsequent installation work that requires the two ends to be aligned with the threaded holes, which wastes time. Utility Model Content

[0004] The utility model aims to solve the problem that the threads on both sides of the outer wall of the existing internal fixing screw are arranged on the same rod body and have the same direction. When disassembling and assembling, it is a synchronous operation, which easily leads to the disassembly of the end that does not need to be disassembled and repaired, resulting in the subsequent need to align the two ends with the threaded holes for installation, resulting in a waste of time. A double-threaded anti-slipping internal fixing screw is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A double-threaded anti-slipping internal fixing screw, comprising:

[0007] A first rod body, a transition rod is connected to the bottom of the first rod body, and a second rod body is inserted into the bottom end of the transition rod, a ball is inlaid at the intersection of the second rod body and the transition rod, and a first movable rod is inserted into the inner side of the second rod body, a second movable rod is arranged on the inner side of the first movable rod, and the bottom end of the second movable rod is movably connected to a first connecting shaft, connecting rods are movably connected to both sides of the outer wall of the first connecting shaft, and an insert block is connected to the other end of the connecting rod, and the insert block is connected to the connecting rod through the second connecting shaft.

[0008] Preferably, the direction of the outer wall thread of the first rod body is opposite to the direction of the outer wall thread of the second rod body.

[0009] Preferably, the transition rod is in a truncated cone structure, and the transition rod and the second rod body form a movable structure through a ball.

[0010] Preferably, the second movable rod is threadedly connected to the inner side of the first movable rod, and the central axis of the second movable rod coincides with the central axis of the first movable rod.

[0011] Preferably, the insert block is slidably connected to the first movable rod, and the insert block is symmetrical about the central axis of the first movable rod.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] 1. In the utility model, by arranging the first rod body, the transition rod, the second rod body and the ball bearing, when people perform internal fixation on the screw, they can dock the second rod body with one place, and dock the first rod body with the second place, so that when any end of the screw is removed, the other rod body of the first rod body and the second rod body will not move. Therefore, in the subsequent installation work, only one end needs to be aligned with the threaded hole for connection work, which saves time. In addition, when the screw is externally fixed, the cooperation of the first movable rod and the second movable rod can drive the second rod body to rotate to complete the connection work, and then the first rod body is rotated to complete the connection work of the screw as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall front structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall internal structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between the transition rod and the second rod body in the utility model;

[0017] Figure 4 It is a schematic diagram of the enlarged structure of point A in the utility model.

[0018] Legend:

[0019] 1. First rod body; 2. Transition rod; 3. Second rod body; 4. First movable rod; 5. Second movable rod; 6. Ball bearing; 7. First connecting shaft; 8. Connecting rod; 9. Second connecting shaft; 10. Insert block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-4, a double-threaded anti-slipping internal fixing screw, comprising a first rod body 1, a transition rod 2 is connected to the bottom of the first rod body 1, and a second rod body 3 is inserted into the bottom end of the transition rod 2, the outer wall thread direction of the first rod body 1 is opposite to the outer wall thread direction of the second rod body 3, by setting the threads with opposite directions, the first rod body 1 and the second rod body 3 are not easy to fall off during the external fixed connection work, the intersection of the second rod body 3 and the transition rod 2 is inlaid with a ball 6, and the inner side of the second rod body 3 is inserted with a first movable rod 4, the transition rod 2 is a truncated cone structure, and the transition rod 2 and the second rod body 3 form a movable structure through the ball 6, by setting the ball 6 at the intersection of the transition rod 2 and the second rod body 3, when the first rod body 1 is connected, it will not affect the second rod body 3, and similarly, when the second rod body 3 is connected, it will not interfere with the first rod body 1;

[0022] A second movable rod 5 is arranged on the inner side of the first movable rod 4, and the bottom end of the second movable rod 5 is movably connected with the first connecting shaft 7. The second movable rod 5 is threadedly connected to the inner side of the first movable rod 4, and the central axis of the second movable rod 5 coincides with the central axis of the first movable rod 4. By rotating the second movable rod 5, the connecting rod 8 and the plug block 10 connected thereto can be moved and inserted into the slot hole in the inner wall of the rod body, thereby playing a limiting role, making it convenient to drive the second rod body 3 and the first rod body 1 to perform external fixation work. A connecting rod 8 is movably connected to both sides of the outer wall of a connecting shaft 7, and an insert block 10 is connected to the other end of the connecting rod 8. The insert block 10 is connected to the connecting rod 8 through a second connecting shaft 9. The insert block 10 is slidably connected to the first movable rod 4, and the insert block 10 is symmetrical about the central axis of the first movable rod 4. The first movable rod 4 and the insert block 10 are slidably connected, so that the through groove on the outer wall of the first movable rod 4 can limit the insert block 10 and perform linear motion, so that the insert block 10 can smoothly move into the slot hole on the inner wall of the rod body.

[0023] Working principle: When in use, the staff first rotates the second rod 3 to connect one end of the screw when the screw is fixed internally, and then rotates the first rod 1 to complete the connection of the other end of the screw, so that the two can be connected independently under the action of the ball 6 without interfering with each other and without the phenomenon of overall falling off. In addition, when the screw is used for external fixation, the second movable rod 5 can be rotated to push the connecting rod 8 and the plug block 10, so that the plug block 10 can move along the The through slot provided on the outer wall of the first movable rod 4 moves and is inserted into the slot hole provided on the inner wall of the second rod body 3 to perform the limiting work. After the first movable rod 4 is manually rotated, the second rod body 3 can be driven to rotate to complete the connection work. Similarly, after the second movable rod 5 is manually rotated, the insert block 10 moves up along the inner through slot of the first movable rod 4 and is inserted into the slot hole provided on the inner wall of the first rod body 1 to perform the limiting work. After the first movable rod 4 is manually rotated, the first rod body 1 can be driven to rotate, thereby completing the overall connection work of the screw.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-threaded anti-slip internal fixation screw, comprising: A first rod body (1), characterized in that: a transition rod (2) is connected to the bottom of the first rod body (1), and a second rod body (3) is inserted into the bottom end of the transition rod (2), a ball (6) is embedded at the intersection of the second rod body (3) and the transition rod (2), and a first movable rod (4) is inserted into the inner side of the second rod body (3), a second movable rod (5) is arranged on the inner side of the first movable rod (4), and the bottom end of the second movable rod (5) is movably connected to a first connecting shaft (7), both sides of the outer wall of the first connecting shaft (7) are movably connected to connecting rods (8), and the other end of the connecting rod (8) is connected to an insert block (10), and the insert block (10) is connected to the connecting rod (8) through a second connecting shaft (9).

2. A double-threaded anti-slip internal fixation screw according to claim 1, characterized in that: The direction of the thread on the outer wall of the first rod body (1) is opposite to the direction of the thread on the outer wall of the second rod body (3).

3. A double-threaded anti-slip internal fixation screw according to claim 1, characterized in that: The transition rod (2) is a truncated cone structure, and the transition rod (2) forms a movable structure with the second rod body (3) through the ball bearing (6).

4. The double-threaded anti-slip internal fixation screw according to claim 1, characterized in that: The second movable rod (5) is threadedly connected to the inner side of the first movable rod (4), and the central axis of the second movable rod (5) coincides with the central axis of the first movable rod (4).

5. The double-threaded anti-slip internal fixation screw according to claim 1, characterized in that: The insert block (10) is slidably connected to the first movable rod (4), and the insert block (10) is symmetrical about the central axis of the first movable rod (4).

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