Anti-theft fixing and sealing device for externally-buckled number plate

Abstract

The utility model relates to the technical field of anti-theft of vehicle license plates, in particular to an anti-theft fixing and sealing device for an externally-buckled license plate, which comprises a fixing screw rod, a gasket movably sleeved on the outer side of the fixing screw rod, a first cross-shaped clamping groove arranged at the top end of the head of the fixing screw rod, and a locking cylinder movably sleeved on the outer side of the head of the fixing screw rod. A threaded groove is formed in the outer side of the head of the fixing screw rod, an internal thread circular ring is fixedly installed on the inner wall, close to the bottom end, of the locking cylinder, the threaded groove and the internal thread circular ring are connected through threads, and a locking mechanism used for fixedly sealing the fixing screw rod is fixedly arranged in the locking cylinder in a cross shape. After the license plate is installed on a vehicle through the fixing screw rod pair, the locking cylinder is connected to the outer side of the head of the fixing screw rod through the threads, the locking cylinder is locked through the locking mechanism, at the moment, the locking cylinder cannot be rotated from the outer side through a tool, and then locking of the fixing screw rod is completed; therefore, the anti-theft performance is obviously enhanced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle license plate anti-theft technology, and in particular to an anti-theft fastening device for externally clipped license plates. Background Technology

[0002] Currently, with the continuous growth of car ownership, vehicle license plates are generally fixed to the license plate mounting frame using ordinary screw connectors. However, these screw connectors can be easily removed with the help of common tools such as wrenches or screwdrivers, making it extremely easy for license plates to be illegally removed. Some criminals take advantage of this loophole to frequently steal license plates for illegal and criminal activities, which not only seriously disrupts the normal lives of car owners, but also poses a potential threat to the stability of social order.

[0003] For example, the Chinese patent with authorization announcement number CN216842578U discloses an external buckle type anti-theft sealing device for license plates. Its working principle is as follows: "After the threaded post connects and fixes the vehicle license plate, an anti-theft cover is fitted on each nut. By turning the anti-theft cover with a screwdriver, the threaded cylinder on the inner side of the anti-theft cover is tightened with the external thread on the nut. Then, an adhesive iron piece is pasted to the inner side of the second groove. After the glue dries, the adhesive piece cannot be removed normally. When the adhesive piece cannot be removed, the anti-theft cover cannot be removed, thus achieving the anti-theft function." Although the second groove inside the anti-theft cover is blocked by the adhesive iron piece, making it impossible to turn the anti-theft cover with a screwdriver, the anti-theft cover and the nut on the threaded post are only fixed by the thread. If a tool is used to rotate the anti-theft cover from the outside, the threaded connection between it and the threaded post can be easily released, and then it can be removed. This obviously weakens the anti-theft performance. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution: an anti-theft fixing device for externally fastened license plates, comprising a fixing screw, a washer movably sleeved on the outer side of the fixing screw, a first cross groove opened at the top of the head of the fixing screw, a locking cylinder movably sleeved on the outer side of the head of the fixing screw, a threaded groove opened on the outer side of the head of the fixing screw, and an internally threaded ring fixedly installed on the inner wall of the locking cylinder close to the bottom end, wherein the threaded groove and the internally threaded ring are connected by threads;

[0005] The locking cylinder has a cross-shaped locking mechanism inside for securing the fixing screw.

[0006] As an improvement to the above technical solution, the locking mechanism includes a circular block, a fixing plate, a cross-shaped locking block, a return spring, an adhesive plate, and pressing cylinders. The circular block is fixedly installed on the inner wall of the locking cylinder close to its top. A second cross-shaped slot is formed through the center of the top of the circular block. The fixing plate is fixedly installed on both sides of the inner wall of the second cross-shaped slot close to its top. The cross-shaped locking block is movably engaged in the second cross-shaped slot, and its bottom end is movably engaged with the first cross-shaped slot. The return spring is fixedly installed at the bottom of the fixing plate, and its bottom end is fixedly installed with the top of the cross-shaped locking block. The adhesive plate is glued to the top of the circular block. The circular block is located inside the locking cylinder. Multiple pressing cylinders are fixedly installed in a circular arrangement at the bottom of the adhesive plate. The bottom ends of the pressing cylinders extend into the second cross-shaped slot and abut against the top of the cross-shaped locking block.

[0007] As an improvement to the above technical solution, the first cross-shaped card slot and the second cross-shaped card slot are the same size, and the top of the first cross-shaped card slot is designed with rounded corners.

[0008] As an improvement to the above technical solution, the top of the adhesive plate is provided with multiple assisted arc-shaped grooves in a circular through-hole pattern.

[0009] As an improvement to the above technical solution, the inner top wall of the locking cylinder is designed with rounded corners.

[0010] The beneficial effects of this utility model are as follows: After the license plate is installed on the vehicle by fixing screw, the locking cylinder is connected to the outside of the head of fixing screw by thread, and the locking cylinder is locked by locking mechanism. At this time, the locking cylinder cannot be rotated by tools from the outside, thus completing the locking of fixing screw, which obviously enhances the anti-theft performance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is an internal sectional view of the overall structure of this utility model;

[0013] Figure 3 This is an exploded view of the overall structure of this utility model;

[0014] Figure 4 This is a cross-sectional view of the internal structure of the locking cylinder of this utility model;

[0015] Figure 5 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0016] Figure 6 This utility model Figure 4 Enlarged view of the structure at point B in the middle.

[0017] Reference numerals: 1. Fixing screw; 11. Washer; 12. First cross slot; 2. Locking cylinder; 21. Threaded groove; 22. Internal threaded ring; 23. Circular block; 24. Second cross slot; 25. Fixing plate; 26. Cross locking block; 27. Return spring; 28. Adhesive plate; 29. ​​Pressing cylinder. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following provides a more detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0019] Reference Appendix Figure 1 ,exist Figure 1 In the diagram, 'a' points to the front view and 'b' points to the right-side view. These views are only used to understand the scheme.

[0020] Please see Figure 1-6 This utility model provides a technical solution: an anti-theft fixing device for an external buckle license plate, including a fixing screw 1, a gasket 11 movably sleeved on the outer side of the fixing screw 1, a first cross groove 12 opened at the top of the head of the fixing screw 1, a locking cylinder 2 movably sleeved on the outer side of the head of the fixing screw 1, a threaded groove 21 opened on the outer side of the head of the fixing screw 1, and an internally threaded ring 22 fixedly installed on the inner wall of the locking cylinder 2 close to the bottom end, the threaded groove 21 and the internally threaded ring 22 are connected by threads;

[0021] The interior of the locking cylinder 2 is fixedly equipped with a locking mechanism in a cross shape for securing the fixing screw 1.

[0022] In this embodiment, after the license plate is installed on the vehicle by fixing screw 1, locking cylinder 2 is connected to the outside of the head of fixing screw 1 by thread. Locking cylinder 2 is then locked by locking mechanism. At this time, locking cylinder 2 cannot be rotated from the outside with tools, thus completing the locking of fixing screw 1.

[0023] Specifically, the locking mechanism includes a circular block 23, a fixing plate 25, a cross-shaped locking block 26, a return spring 27, an adhesive plate 28, and pressing cylinders 29. The circular block 23 is fixedly installed on the inner wall of the locking cylinder 2 close to the top. The top center of the circular block 23 has a through-hole second cross-shaped slot 24. The fixing plate 25 is fixedly installed on both sides of the inner wall of the second cross-shaped slot 24 close to the top. The cross-shaped locking block 26 is movably engaged in the second cross-shaped slot 24. The bottom end of the cross-shaped locking block 26 is movably engaged with the first cross-shaped slot 12. The return spring 27 is fixedly installed at the bottom of the fixing plate 25. The bottom end of the return spring 27 is fixedly installed with the top of the cross-shaped locking block 26. The adhesive plate 28 is glued to the top of the circular block 23. The circular block 23 is located inside the locking cylinder 2. Multiple pressing cylinders 29 are fixedly installed in a circular arrangement at the bottom of the adhesive plate 28. The bottom ends of the pressing cylinders 29 extend into the second cross-shaped slot 24 and abut against the top of the cross-shaped locking block 26.

[0024] In this embodiment, the locking cylinder 2, which is sleeved on the outside of the head of the fixing screw 1, is locked by the cooperation of the internal structure of the locking mechanism.

[0025] Specifically, the first cross-shaped slot 12 and the second cross-shaped slot 24 are the same size, and the top of the first cross-shaped slot 12 has a rounded corner design.

[0026] In this embodiment, the cross-shaped locking block 26 is thus able to engage with the first cross-shaped slot 12 when it is pushed and moved.

[0027] Specifically, the top of the adhesive plate 28 has multiple assisted arc-shaped grooves that are circularly through-hole.

[0028] In this embodiment, if it is necessary to remove the license plate, the adhesive plate 28 can be continuously heated with a hot air gun to soften the adhesive, and then the arc-shaped groove can be pried off with a flathead screwdriver to remove the license plate.

[0029] Specifically, the inner top wall of the locking cylinder 2 has a rounded corner design.

[0030] In this embodiment, the adhesive plate 28 is thus easily inserted into the locking cylinder 2.

[0031] In use, the fixing screw 1 is inserted through the mounting hole on the license plate and installed into the license plate hole, and then connected with the threaded hole. A screwdriver is then used to tighten the license plate by turning the first cross-shaped groove 12 on the head of the fixing screw 1. A washer 11 protects against wear and tear between the head of the fixing screw 1 and the license plate. Then, the locking cylinder 2 is fitted over the head of the fixing screw 1 and rotated, causing the internal threaded ring 22 and the threaded groove 21 to connect threadedly. During the rotation of the locking cylinder 2, the internal threaded ring 22 and the threaded groove 21 move it closer to the license plate. The locking cylinder 2 also moves the circular block 23 and the cross-shaped locking block 26 synchronously. After the locking cylinder 2 is moved to the designated position, glue is applied to the top of the circular block 23, and then the adhesive plate 28 is glued to the top of the circular block 23. At this time, the pressing cylinder 29 at the bottom of the adhesive plate 28 extends into the second cross slot 24 and pushes the cross locking block 26 to move closer to the license plate. As the cross locking block 26 moves, it causes the return spring 27 to extend. During the movement, the cross locking block 26 is engaged in the first cross slot 12. The locking cylinder 2 is locked by the engagement of the cross locking block 26 and the first cross slot 12. At this time, the locking cylinder 2 cannot be rotated from the outside with tools, thus completing the locking of the fixing screw 1. This obviously enhances the anti-theft performance.

[0032] If you need to remove the license plate, you can use a hot air gun to continuously heat the adhesive board 28 to soften the glue, and then use a flathead screwdriver to slowly pry it off to remove the license plate.

[0033] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A theft-proof sealing device for an outer buckle type license plate, comprising a fixing screw rod (1), characterized in that: The outer movable sleeve of the fixed screw rod (1) is provided with a gasket (11), the head top end of the fixed screw rod (1) is provided with a first cross clamping groove (12), the outer side of the head of the fixed screw rod (1) is movably sleeved with a locking cylinder (2), the outer side of the head of the fixed screw rod (1) is provided with a threaded groove (21), the inner wall of the locking cylinder (2) is fixedly installed with an internal thread ring (22) close to the bottom end, and the threaded groove (21) and the internal thread ring (22) are connected through threads. The inside of the locking cylinder (2) is fixedly provided with a locking mechanism for sealing the fixed screw rod (1).

2. The theft-proof sealing device for an externally buckled license plate according to claim 1, characterized in that: The locking mechanism comprises a circular block (23), a fixed plate (25), a cross locking clamping block (26), a reset spring (27), an adhesive plate (28) and a pressing cylinder (29), the circular block (23) is fixedly installed on the inner wall of the locking cylinder (2) close to the top end, the top center of the circular block (23) is provided with a second cross clamping groove (24) in a through manner, the fixed plate (25) is fixedly installed on the inner wall of the second cross clamping groove (24) close to the top end on both sides, the cross locking clamping block (26) is movably clamped in the second cross clamping groove (24), the bottom end of the cross locking clamping block (26) is movably clamped with the first cross clamping groove (12), the reset spring (27) is fixedly installed on the bottom of the fixed plate (25), the bottom end of the reset spring (27) is fixedly installed with the top of the cross locking clamping block (26), the adhesive plate (28) is adhered on the top of the circular block (23) by glue, the circular block (23) is located in the locking cylinder (2), a plurality of pressing cylinders (29) are fixedly installed on the bottom of the adhesive plate (28) in a circular center arrangement, the bottom end of the pressing cylinder (29) extends into the second cross clamping groove (24) and abuts against the top of the cross locking clamping block (26).

3. A theft-proof sealing device for externally buckled number plates according to claim 2, characterized in that: The first cross clamping groove (12) and the second cross clamping groove (24) are the same size, and the top of the first cross clamping groove (12) is designed as a round angle.

4. The theft-proof sealing device for an outer buckle license plate according to claim 2, characterized in that: The top of the adhesive plate (28) is provided with a plurality of power arc grooves in a circular through manner.

5. The theft-proof sealing device for an externally buckled license plate according to claim 2, characterized in that: The top inner wall of the locking cylinder (2) is designed as a round angle.

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