Novel anti-loosening license plate fixing and sealing device

Abstract

The utility model discloses a novel anti-loose license plate fixing and sealing device which comprises a base, a cover cap, an inner fastener and a bolt and further comprises a backing ring, the bolt penetrates through an inner through hole of the backing ring, the bolt and the inner through hole are both located in a cavity formed by the inner fastener and the cover cap, and a counter bore is formed in the backing ring and embedded with a screw head of the bolt. The inner wall of an opening of the cover cap is of a necking-down inward-retracting structure with the outer portion smaller than the inner portion, and the cover cap is installed on the inner wall and the inverted folding portion of the inner fastener in a matched mode; according to the fixing and sealing device, through limiting of the cap and the necking structure of the inner fastener and arrangement of the cushion block, stable installation for preventing the cap from loosening and disengaging is achieved, the end of the bolt is lifted to abut against the inner wall of the cap through the cushion ring, a cavity between the bolt and the cap is eliminated, and on one hand, screw vibration loosening and outward retreating are avoided; space is prevented from being reserved in the mode that the cover cap is damaged from the outside for disassembly, so that the problem of looseness under vibration is avoided, the disassembly difficulty after installation can be improved, and the risk that the license plate is stolen is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle license plate fixing and installation, in particular to a novel anti-loosening vehicle license plate fixing and sealing device. Background Art

[0002] Motor vehicles have become a very common means of transportation and their number is increasing. However, motor vehicle license plates are often stolen by criminals and used for illegal activities. A considerable number of car owners also privately replace their license plates, often using the same license plate on different vehicles or multiple different license plates on the same vehicle to circumvent traffic regulations. This has seriously harmed people's lives and property and caused serious consequences.

[0003] The license plates on traditional motor vehicles usually use ordinary screw connectors for fixing. For reference, the applicant has previously proposed a patent: CN202520401472.1. A license plate fixing device, by setting a pad in the fixing device, avoids the possibility of the screw loosening under vibration to a certain extent. However, this structure still has design deficiencies, such as the pad is clamped between the end of the screw and the cap, and friction is formed under the clamping of the two, which may cause the rotation of the cap to drive the internal screw to rotate. Secondly, one is that the pad is not easy to The utility model relates to a device which is convenient for carrying, and it is easy to forget to insert the cap before buckling it, and the cover cap cannot be easily removed after buckling it, so many users do not use it. In addition, the design of the pad in the prior art is also very inconvenient during installation. When buckling it, it is necessary to insert the pad first and then buckle the cap. The pad is easy to fall out, which makes the installation complicated. In addition, the prior art also has the problem that the locking screws may also produce greater friction with the base. After the vise is clamped and pulled outward, the rotating sealing base may cause the internal screws to rotate, thereby causing the fixing device to fail to play an anti-theft role. Utility Model Content

[0004] In order to ensure the installation of the vehicle license plate, the utility model provides a novel anti-loosening vehicle license plate fixing and sealing device.

[0005] The technical solution adopted by the utility model is: a new type of anti-loosening license plate sealing device, including a base, a cover cap, an inner fastener and a bolt, the inner fastener is fixed to the base, the cover cap is buckled on the base, and the inner fastener is installed against the inner wall of the base, the screw head of the bolt is located in the inner fastener, the threaded rod passes through the inner fastener and extends out from the base, and also includes a gasket, the bolt is set through the inner through hole of the gasket, and both are located in the cavity formed by the inner fastener and the cover cap, and the gasket is provided with a countersunk hole that is engaged with the screw head of the bolt.

[0006] Preferably, the inner wall of the opening of the cap is arranged in a constricted inward structure with a smaller outer portion and a larger inner portion, and the inner wall cooperates with the inverted folded portion of the inner fastener to install the cap.

[0007] Preferably, the countersink depth of the washer is greater than the screw head setting of the bolt.

[0008] Preferably, the outer diameter of the gasket is smaller than the inner hole diameter of the inner fastener, and the diameter of the inner through hole provided on the gasket is larger than the diameter of the threaded portion of the bolt.

[0009] Preferably, the bottom of the countersunk hole has a tapered slope surface and an inner through hole, and the bolt is provided with a corresponding inclined portion.

[0010] Preferably, the inclination angle of the tapered slope surface is greater than that of the slope portion.

[0011] Preferably, the gasket is fixedly connected to the screw head.

[0012] Preferably, the inner fastener is fixedly connected to the gasket.

[0013] Preferably, an inner clamping portion is provided on the inner wall of the inner fastener, and the minimum diameter formed by a plurality of the inner clamping portions is smaller than the maximum diameter of the gasket.

[0014] Preferably, a clamping groove is provided on the gasket relative to the inner clamping portion.

[0015] Beneficial effect: The sealing device of the present invention relies on the cooperation of the cap and the inner fastener, with the inverted part of the inner fastener resting on the inner wall of the cap with a beveled necking design, to achieve stable installation to prevent the cap from loosening and falling out. Compared with the existing technology, the utility model has a gasket on the inner side of the inner mouth, and the gasket has an inner through hole for the bolt to pass through, and lifts the end of the bolt to abut against the inner wall of the cap, eliminating the cavity between the two. Firstly, it prevents the screw from vibrating and loosening and exiting outward, and secondly, it avoids damaging the cap from the outside and leaving space for disassembly. The device of this embodiment, based on the cap and the inner fastener necking structure limit and the gasket to prevent the bolts from loosening during use, thereby avoiding the problem of the device loosening under vibration after installation, and can also increase the difficulty of disassembly after installation, thereby reducing the risk of license plate theft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the sealing device of the utility model.

[0017] Figure 2 This is a schematic diagram of the structural components of the sealing device of the utility model.

[0018] Figure 3 This is a structural diagram of Example 1 of the utility model.

[0019] Figure 4 This is a structural diagram of Example 2 of the present utility model.

[0020] Figure 5 This is a structural diagram of Example 3 of the present utility model.

[0021] Figure numerals: 1. base; 2. cover cap; 21. opening; 22. inner wall; 3. bolt; 31. screw head; 32. inclined portion; 4. gasket; 41. countersunk hole; 42. tapered slope surface; 43. inner through hole; 44. clamping groove; 5. inner fastener; 53. inner clamping portion; 55. inverted folded portion. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0023] like Figure 1-3 The shown device is a new type of anti-loosening license plate sealing device, including a base 1, a cap 2, an inner fastener 5 and a bolt 3. The inner fastener 5 is fixed to the base 1, the cap 2 is buckled on the base 1, and is installed against its inner wall with the inner fastener 5. The screw head 31 of the bolt 3 is located in the inner fastener 5, and the threaded rod extends through the inner fastener 5 and the base 1. It also includes a gasket 4. The bolt 3 is arranged through the inner through hole 43 of the gasket 4, and both are located in the cavity formed by the inner fastener 5 and the cap 2. The gasket 4 is provided with a countersunk hole 41 that is engaged with the screw head 31 of the bolt 3.

[0024] Furthermore, the countersunk hole 41 of the washer 4 provided in the present invention is deeper than the screw head 31 of the bolt 3 , and the purpose of this setting is to prevent the screw head 31 of the bolt 3 from directly contacting the cap 2 .

[0025] Furthermore, the inner wall 22 at the opening 21 of the cap 2 is arranged in a concave-shaped inward-retracted structure with a smaller outside and a larger inside. The inner wall 22 cooperates with the inverted portion 55 of the inner fastener 5 to install the cap 2. During installation, the cap 2 is buckled onto the inner fastener 5 fixed in the base 1, and the opening 21 provided with the concave-shaped inward-retracted structure cooperates with the inverted portion 55 of the inner fastener 5 that is folded outward, causing deformation in the initial stage of installation, and forming a stable installation limit after it is fully buckled in. The concave-shaped structure is used to form a fixed installation of the cap 2, thereby increasing the difficulty of disassembling the cap 2. Example 1:

[0026] like Figure 3In the technical solution of embodiment 1 shown, after installation, the gasket 4 moves circumferentially relative to the inner fastener 5, and the bolt 3 moves circumferentially relative to the gasket 4. When encountering external force, such as clamping the sealing device with pliers and rotating and twisting it, the gasket 4 is set based on the metal material. First, the strength of the gasket 4 is sufficient to withstand deformation pressure without affecting the bolts 3 passing through the inside. Second, when the above-mentioned pliers are clamped and twisted, based on the setting of the gasket 4, the rotation of the base 1 will cause rotation relative to the gasket 4. If the gasket 4 rotates, the internal bolt 3 will also rotate relative to the gasket 4. This can avoid the possibility of the clamping base 1 being pulled outward and rotated at the same time, driving the bolt 3 to rotate together, resulting in the bolt 3 being directly removed without opening the sealing device. Furthermore, the gasket 4 eliminates the inner cavity of the inner fastener 5, which not only increases the difficulty of external force damaging the cap 2, but also the bolt 3 basically hits the inner wall of the cap 2, leaving no space for it to loosen and retreat, thereby avoiding the possibility of the sealing device loosening under vehicle vibration.

[0027] As in the principle of the above-mentioned embodiment, the outer diameter of the gasket 4 of this embodiment is smaller than the inner diameter of the inner fastener 5, and the diameter of the inner through hole 43 set on the gasket 4 is larger than the diameter of the threaded portion of the bolt 3, so that the relative friction between the three is small and they can rotate relative to each other under external force.

[0028] As in the principle of the above-mentioned embodiment, the bottom of the countersunk hole 41 of this embodiment has a centrally directed tapered slope surface 42 and an inner through hole 43. The bolt 3 is provided with a corresponding inclined portion 32. The inclination angle of the tapered slope surface 42 is greater than that of the inclined portion 32. Through the angle setting of the slope, the contact area between the bolt 3 and the washer 4 is smaller, and the contact between the two in the circumferential direction is less, thereby reducing friction and preventing the bolt 3 from being rotated by the washer 4 under external force. Example 2:

[0029] refer to Figure 4 The washer 4 shown is fixedly connected to the screw head 31. The core principle of this design and the design of the internal fastener 5 fixedly connected to the washer 4 (the structural principle is clear, not shown in the drawings) is to reduce the number of components and directly combine the washer 4 with the components on one side. The defect relative to Example 1 is that the transfer and rotation function of the washer 4 disappears. The advantage is that it is more convenient to use. On this basis, considering the prior art, the axial thickness of the screw head 31 of the column screw is also large. Therefore, it is not ruled out that the above-mentioned washer 4 also plays a role of rotation buffer between the bolt 3 and the internal fastener 5. The commercially available column screw is used, and the inner hole depth design of the internal fastener 5 is combined to meet the solution of preventing the bolt 3 from withdrawing outward under vibration. Furthermore, the fixing method of the washer 4 and the screw head 31 can be adopted, but is not limited to, Figure 5The inner clamping parts 53 are punched out from the inner fastener 5 by a stamping device, and the gasket 4 is clamped and fixed by multiple inner clamping parts 53 . Example 3:

[0030] Further, such as Figure 5 In the scheme of Example 2 shown, in order to achieve the technical effect of Example 1 and avoid the problem of too many components proposed in Example 2, Example 3 proposes to provide an inner clamping portion 53 on the inner wall of the inner fastener 5, and the minimum diameter formed by multiple inner clamping portions 53 is smaller than the maximum diameter of the gasket 4. A clamping groove 44 is provided on the gasket 4 relative to the inner clamping portion 53. Through this scheme, when the gasket 4 is installed, it is pressed in by external force, and the gasket 4 is clamped into the clamping groove 44 based on the interference clamping method. Since the minimum inner diameter of the inner clamping portion 53 is larger than the minimum diameter of the clamping groove 44, the rotation of the gasket 4 relative to the inner fastener 5 will not be interfered with or restricted. The scheme of Example 3 not only meets the convenience of factory assembly and avoids the problem of excessive installation of parts, but also can achieve better anti-loosening and anti-dismantling effects, can better meet the market promotion and use, and is more practical.

[0031] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the present invention and its equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A novel anti-loosening license plate sealing device, comprising a base (1), a cover cap (2), an inner fastener (5) and a bolt (3), wherein the inner fastener (5) is fixed to the base (1), the cover cap (2) is buckled on the base (1) and is mounted against the inner wall thereof by the inner fastener (5), the screw head (31) of the bolt (3) is located on the inner fastener (5), and the threaded rod portion passes through the inner fastener (5) and the base (1) and extends out, characterized in that: It also includes a gasket (4), the bolt (3) is arranged to pass through the inner through hole (43) of the gasket (4), and both are located in the cavity formed by the inner fastener (5) and the cover cap (2), and the gasket (4) is provided with a countersunk hole (41) that is engaged with the screw head (31) of the bolt (3).

2. The novel anti-loosening license plate sealing device according to claim 1, characterized in that: The inner wall (22) at the opening (21) of the cap (2) is configured as a narrowed inward-contracted structure with a smaller outer portion and a larger inner portion. The inner wall (22) cooperates with the inverted portion (55) of the inner fastener (5) to mount the cap (2).

3. The novel anti-loosening license plate sealing device according to claim 1 is characterized in that: The depth of the countersunk hole (41) of the backing ring (4) is greater than the screw head (31) of the bolt (3).

4. The novel anti-loosening license plate sealing device according to claim 1 is characterized in that: The outer diameter of the gasket (4) is smaller than the inner diameter of the inner fastener (5), and the diameter of the inner through hole (43) provided on the gasket (4) is larger than the diameter of the threaded portion of the bolt (3).

5. The novel anti-loosening license plate sealing device according to claim 1 is characterized in that: The bottom of the countersunk hole (41) is provided with a tapered slope surface (42) and an inner through hole (43) directed inward, and the bolt (3) is provided with a corresponding inclined surface (32).

6. The novel anti-loosening license plate sealing device according to claim 5, characterized in that: The inclination angle of the tapered slope surface (42) is greater than that of the slope portion (32).

7. The novel anti-loosening license plate sealing device according to claim 1 is characterized in that: The backing ring (4) is fixedly connected to the screw head (31).

8. The novel anti-loosening license plate sealing device according to claim 1 is characterized in that: The inner fastener (5) is fixedly connected to the gasket (4).

9. The novel anti-loosening license plate sealing device according to claim 1, characterized in that: An inner clamping portion (53) is provided on the inner wall of the inner fastener (5), and the minimum diameter formed by the plurality of inner clamping portions (53) is smaller than the maximum diameter of the gasket (4).

10. The novel anti-loosening license plate sealing device according to claim 9, characterized in that: A clamping groove (44) is provided on the backing ring (4) opposite to the inner clamping portion (53).

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