Locking screw with screwing-out device

Abstract

The utility model relates to the technical field of medical instruments, and discloses a locking screw with a screwing-out device, which comprises a screw cap, a screwing-out ring is mounted at the top of the screw cap, a mounting assembly is arranged on one side of the screwing-out ring, a replacement assembly is mounted in the screw cap, the mounting assembly comprises a limiting groove, and the limiting groove is formed in the screw cap. And the inner wall of the limiting groove is connected with a limiting rod in a clamping manner. The locking screw with the screwing-out device is provided with a limiting groove, a limiting rod, a movable groove, a first spring, a sliding groove and a sliding block, the screwing-out ring is installed on the outer surface of the nut, a user can move the sliding block inwards with the hand, then the limiting rod moves inwards, limiting and fixing of the screwing-out ring are relieved, and the locking screw with the screwing-out device is convenient to use. When the screw is screwed out, the outer arc surface of the screwing-out ring extends into the arc groove to screw out the screw, tools such as coins do not need to be found for operation, the time needed for screwing out the screw is shortened, the screw can be installed at the original position to be stored after being used, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a locking screw with a screwing-out device. Background Art

[0002] Locking screws are a special type of screw used primarily to fix broken bones or other bony structures. They are often used in surgery to help bones stay in the correct position during the healing process and to promote the healing of broken bones.

[0003] Compared with traditional non-locking screws, locking screws have the following advantages: locking screws can provide better fixation and reduce the risk of screw loosening or displacement. Since locking screws can provide stable fixation, patients can start rehabilitation exercises earlier and accelerate the healing process of fractures. The use of locking screws can reduce the occurrence of complications such as fixation failure, screw loosening or displacement. Due to the design characteristics of locking screws, traditional screw-out tools may not be able to effectively screw them out, so special screw-out devices are required.

[0004] The prior art patent document with publication number CN215762686U provides a new screw head structure that is easy to twist. The screw is provided with an arc groove, and the screwing operation can be completed using a coin, which is convenient and quick. The arc surface notch is provided to facilitate fingers to hold coins, thereby improving operational suitability. A fastening through hole is provided to facilitate the tightening or loosening operation of the screw, thereby improving operational suitability.

[0005] In the above-mentioned prior art, although the screw is provided with an arc groove, a coin can be used to complete the screwing operation, which is convenient and quick, however, the screw in the patent technology still needs to be operated with a coin as a tool when unscrewing it. If there is no coin, it is not convenient to unscrew it. It has limitations to a certain extent and cannot be unscrewed conveniently. Therefore, we need a locking screw with an unscrewing device. Utility Model Content

[0006] The purpose of the utility model is to provide a locking screw with an unscrewing device to solve the problem that the screw in the patent technology proposed in the above background technology still needs to be operated with a coin as a tool when unscrewing it, and it is inconvenient to unscrew it without a coin, which has limitations to a certain extent and cannot be easily unscrewed.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A locking screw with a screw-out device comprises a nut, a screw-out ring is installed on the top of the nut, a mounting component is arranged on one side of the screw-out ring, and a replacement component is installed inside the nut;

[0009] The mounting assembly comprises a limit groove, the inner wall of the limit groove is snap-connected with a limit rod, a movable groove is provided on one side of the nut, and a first spring is fixedly connected to the inner wall of the movable groove, a sliding groove is provided on the top of the hand nut, and a slider is slidably connected to the inner wall of the sliding groove;

[0010] The replacement component includes a screw groove, the inner wall of the screw groove is rotatably connected to a threaded rod, the outer surface of the threaded rod is provided with a fixing groove, and the inner wall of the fixing groove is snap-connected with a fixing rod, one side of the fixing rod is fixedly connected to a pull rod, and the outer surface of the pull rod is sleeved with a second spring.

[0011] Preferably, a circular arc groove is formed on the top of the nut, and a screw body is mounted on the bottom of the nut.

[0012] Preferably, the unscrewing ring forms a snap-fit ​​structure with the limiting rod through a limiting groove, and the shape and size of the limiting groove match the shape and size of the limiting rod, and one side of the limiting rod extends into the inner wall of the limiting groove for connection.

[0013] Preferably, the nut forms an elastic structure with the limiting rod through the first spring, and the shape and size of the limiting rod match the shape and size of the movable groove.

[0014] Preferably, the nut forms a sliding structure with the slider through a sliding groove, and the shape and size of the sliding groove match the shape and size of the slider, and the bottom of the slider is connected to the limiting rod.

[0015] Preferably, the nut forms a rotating structure with the threaded rod through the thread groove, and the external thread of the thread groove matches the external thread of the threaded rod.

[0016] Preferably, the threaded rod forms a snap-fit ​​structure with the fixing rod via a fixing groove, and the shape and size of the fixing groove match the shape and size of the fixing rod, and the nut forms an elastic structure with the fixing rod via a second spring.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the locking screw with a screw-out device,

[0018] First, the utility model is provided with a limit groove, a limit rod, a movable groove, a first spring, a slide groove and a slider. By providing a screw-out ring installed on the outer surface of the nut, the user can move the slider inward by hand, thereby moving the limit rod inward, releasing the limit fixation of the screw-out ring, and then extending the outer arc surface of the screw-out ring into the arc groove to screw out the screw. There is no need to find tools such as coins for operation, which reduces the time required for screwing out the screw. After use, it can be installed to the original position for storage, thereby improving practicality.

[0019] Second, the utility model is provided with a screw groove, a threaded rod, a fixing groove, a fixing rod, a pulling rod and a second spring. The screw is split into a nut and a screw body. After the screw body is installed through the threaded rod and the screw groove, the fixing rod is extended into the fixing groove to fix it. After the circular arc groove at the top of the nut is damaged, the pulling rod can be pulled to release the limitation on the threaded rod, and a new nut can be replaced for use to avoid the situation where the circular arc groove is damaged and cannot be disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0022] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0023] Figure 4 For this utility model Figure 2 Enlarged structural diagram at B in the middle.

[0024] In the figure: 1, nut; 2, unscrewing ring; 3, installation assembly; 301, limit groove; 302, limit rod; 303, movable groove; 304, first spring; 305, slide groove; 306, slider; 4, arc groove; 5, screw body; 6, replacement assembly; 601, screw groove; 602, threaded rod; 603, fixing groove; 604, fixing rod; 605, pull rod; 606, second spring. DETAILED DESCRIPTION

[0025] 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 in 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.

[0026] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 , a locking screw with a screwing-out device, comprising a nut 1, a screwing-out ring 2 is installed on the top of the nut 1, and a mounting component 3 is arranged on one side of the screwing-out ring 2, and a replacement component 6 is installed inside the nut 1;

[0027] The mounting assembly 3 includes a limiting groove 301, the inner wall of the limiting groove 301 is snap-connected with a limiting rod 302, a movable groove 303 is provided on one side of the nut 1, and a first spring 304 is fixedly connected to the inner wall of the movable groove 303, a sliding groove 305 is provided on the top of the hand nut 1, and a slider 306 is slidably connected to the inner wall of the sliding groove 305;

[0028] The replacement component 6 includes a screw groove 601, the inner wall of which is rotatably connected to a threaded rod 602, the outer surface of the threaded rod 602 is provided with a fixing groove 603, and the inner wall of the fixing groove 603 is snap-connected with a fixing rod 604, one side of the fixing rod 604 is fixedly connected to a pull rod 605, and the outer surface of the pull rod 605 is sleeved with a second spring 606.

[0029] Through the above technical solution, by providing a screw-out ring 2 installed on the outer surface of the nut 1, the user can move the slider 306 inward by hand, thereby moving the limit rod 302 inward, releasing the limit fixation of the screw-out ring 2, and then extending the outer arc surface of the screw-out ring 2 into the arc groove 4 to screw out the screw. There is no need to find coins or other tools for operation, which reduces the time required to screw out the screw. After use, it can also be installed to the original position for storage, thereby improving practicality.

[0030] Specifically, a circular arc groove 4 is formed on the top of the nut 1 , and a screw body 5 is installed on the bottom of the nut 1 .

[0031] Through the above technical solution, the arc groove 4 opened on the top of the nut 1 can facilitate the user to rotate it by unscrewing the ring 2, and is also suitable for arc-shaped objects such as coins.

[0032] Specifically, the unscrewing ring 2 forms a snap-fit ​​structure with the limiting rod 302 through the limiting groove 301, and the shape and size of the limiting groove 301 match the shape and size of the limiting rod 302, and one side of the limiting rod 302 extends into the inner wall of the limiting groove 301 for connection.

[0033] Through the above technical solution, it is convenient for the limiting rod 302 to extend into the limiting groove 301 to limit and fix the unscrewing ring 2, thereby achieving the effect of installing the unscrewing ring 2 on the nut 1, and the unscrewing ring 2 can rotate on the nut 1 without taking up space.

[0034] Specifically, the nut 1 forms an elastic structure with the first spring 304 and the limiting rod 302 , and the shape and size of the limiting rod 302 match the shape and size of the movable groove 303 .

[0035] Through the above technical solution, the limiting rod 302 can apply outward pressure under the action of the first spring 304, so that the limiting rod 302 extends into the limiting groove 301 for limiting, thereby achieving the elastic activity effect of the limiting rod 302.

[0036] Specifically, the nut 1 forms a sliding structure through the sliding groove 305 and the sliding block 306 , and the shape and size of the sliding groove 305 match the shape and size of the sliding block 306 , and the bottom of the sliding block 306 is connected to the limiting rod 302 .

[0037] Through the above technical solution, it is convenient to slide the slider 306 by hand to drive the limit rod 302 to move left and right, which is convenient for controlling the movement of the limit rod 302, and then the limit rod 302 can be moved inward to disassemble the unscrewing ring 2 for use, thereby achieving the effect of installing and disassembling the unscrewing ring 2.

[0038] Specifically, the nut 1 forms a rotating structure with the threaded rod 602 through the threaded groove 601 , and the external thread of the threaded groove 601 matches the external thread of the threaded rod 602 .

[0039] The above technical solution facilitates the threaded rod 602 to extend into the screw groove 601 for installation with the nut 1 , thereby splitting the screw into two parts: the nut 1 and the screw body 5 .

[0040] Specifically, the threaded rod 602 forms a snap-fit ​​structure with the fixing rod 604 through the fixing groove 603 , and the shape and size of the fixing groove 603 match the shape and size of the fixing rod 604 . The nut 1 forms an elastic structure with the fixing rod 604 through the second spring 606 .

[0041] Through the above technical solution, it is convenient for the threaded rod 602 to extend into the fixing groove 603 through the fixing rod 604 for limiting and fixing, so that the nut 1 will not be disassembled during the rotation process, and the fixing rod 604 can be disengaged from the fixing groove 603 by moving the pull rod 605 outward by hand, and the damaged nut 1 can be replaced. By loosening the pull rod 605, the fixing rod 604 can be returned to the fixing groove 603 under the action of the second spring 606 to limit it.

[0042] Working principle: When using the locking screw with unscrewing device, first, when the unscrewing ring 2 needs to be removed for use, first move the slider 306 inward by hand, and the slider 306 can drive the limiting rod 302 to move inward, and then make the limiting rod 302 disengage from the limiting groove 301, release the limiting fixation of the unscrewing ring 2, and then extend the outer arc surface of the unscrewing ring 2 into the arc groove 4 to unscrew the screw. There is no need to find coins or other tools to operate, and the screwing work can be completed. When the arc groove 4 at the top of the nut 1 is damaged, you only need to move the pull rod 605 outward by hand, and the pull rod 605 can drive the fixing The fixed rod 604 moves outward, so that the fixed rod 604 disengages from the fixed groove 603, releasing the limit fixation on the threaded rod 602, and then the nut 1 is rotated, the old nut 1 is removed and replaced with a new nut 1, the bottom of the new nut 1 is turned onto the threaded rod 602, and the pull rod 605 is loosened. The fixed rod 604 moves inward under the action of the second spring 606 and returns to the fixed groove 603 to fix the threaded rod 602, which is convenient for dealing with the situation where the arc groove 4 is damaged and cannot be used. This completes all the work. The content not described in detail in this manual belongs to the existing technology known to professional and technical personnel in this field.

[0043] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A locking screw with a screw-out device, comprising a nut (1), characterized in that: A screw-out ring (2) is installed on the top of the nut (1), and a mounting component (3) is arranged on one side of the screw-out ring (2); a replacement component (6) is installed inside the nut (1); The mounting assembly (3) comprises a limiting groove (301), the inner wall of the limiting groove (301) is snap-connected with a limiting rod (302), a movable groove (303) is provided on one side of the nut (1), and the inner wall of the movable groove (303) is fixedly connected with a first spring (304), a sliding groove (305) is provided on the top of the hand nut (1), and the inner wall of the sliding groove (305) is slidably connected with a slider (306); The replacement component (6) includes a screw groove (601), the inner wall of the screw groove (601) is rotatably connected to a threaded rod (602), the outer surface of the threaded rod (602) is provided with a fixing groove (603), and the inner wall of the fixing groove (603) is snap-connected to a fixing rod (604), one side of the fixing rod (604) is fixedly connected to a pull rod (605), and the outer surface of the pull rod (605) is sleeved with a second spring (606).

2. A locking screw with a screw-out device according to claim 1, characterized in that: The top of the nut (1) is provided with an arc groove (4), and the bottom of the nut (1) is provided with a screw body (5).

3. A locking screw with a screw-out device according to claim 1, characterized in that: The screw-out ring (2) forms a snap-fit ​​structure with the limiting rod (302) through the limiting groove (301), and the shape and size of the limiting groove (301) match the shape and size of the limiting rod (302), and one side of the limiting rod (302) extends into the inner wall of the limiting groove (301) for connection.

4. A locking screw with a screw-out device according to claim 1, characterized in that: The nut (1) forms an elastic structure with the first spring (304) and the limiting rod (302), and the shape and size of the limiting rod (302) match the shape and size of the movable groove (303).

5. The locking screw with a screw-out device according to claim 1, characterized in that: The nut (1) forms a sliding structure through a sliding groove (305) and a sliding block (306), and the shape and size of the sliding groove (305) match the shape and size of the sliding block (306), and the bottom of the sliding block (306) is connected to the limiting rod (302).

6. A locking screw with a screw-out device according to claim 1, characterized in that: The nut (1) forms a rotating structure with the threaded rod (602) through the threaded groove (601), and the external thread of the threaded groove (601) matches the external thread of the threaded rod (602).

7. A locking screw with a screw-out device according to claim 1, characterized in that: The threaded rod (602) forms a snap-fit ​​structure with the fixing rod (604) via the fixing groove (603), and the shape and size of the fixing groove (603) match the shape and size of the fixing rod (604). The nut (1) forms an elastic structure with the fixing rod (604) via the second spring (606).

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