A sealing device for motor vehicle

Abstract

The present invention discloses a sealing device for a motor vehicle, comprising a sealing part and an opener. The sealing part fixes a license plate on the vehicle, and the opener is used to remove the sealing part. The sealing part comprises a top cover, a bolt, and a base. The bolt and the base are fastened by threaded cooperation. The top cover is arranged on the outside of the bolt screw head to cover the screw head part, thereby reducing external interference to the screw head part. A movable arc surface is also arranged outside the bolt. When a magnetic block at the edge of the movable arc surface is affected by an external magnetic field, it will leave the screw rod part of the bolt and expand. The expanded movable arc surface is located in the hollow part of the base, so it will be stuck and can only be opened by the opener. After the opener is extended into the blind hole of the base, the movable arc surface is retracted by the magnetic field generated by the coil, so that it can be easily taken out without affecting the disassembly during normal use.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing devices, and in particular relates to a sealing device for a motor vehicle. Background Art

[0002] The number of cars is constantly increasing, and some lawless elements often steal license plates to sell for profit or engage in illegal activities, which is very inconvenient for car owners. At the same time, stolen license plates are replaced at will to avoid traffic fines and other problems, which greatly disrupts the normal social order. The reason for this problem is that the sealing device provided by the prior art has a relatively simple structure, which is generally composed of nuts, washers, and decorative nuts, which is a simple bolt connection structure. Therefore, it can be easily removed by tools such as ordinary wrenches or screwdrivers, and it is difficult to prevent the license plate from being stolen.

[0003] The Chinese invention patent with application number 201620277644.X discloses a sealing device, including a sealing base, a sealing part, a sealing cover, and a sealing cap. The sealing part is a bolt, and it forms a set of bolt mechanisms that cooperate with the sealing cap. There is a accommodating cavity inside the sealing base, and its bottom is fixed to the license plate by the screw head part of the sealing part. The sealing cover is placed in the accommodating cavity of the sealing base. The protruding pieces around the sealing cover are retractable. After being placed in the sealing base, they extend outward so that their diameter is larger than the aperture of the sealing base, so that they are stuck in the sealing base. Compared with the prior art, the invention has a good sealing effect, but it also brings difficulties to normal disassembly. It needs to be opened and violently disassembled, which increases the inconvenience during use. Summary of the invention

[0004] The purpose of the present invention is to provide a sealing device for a motor vehicle, which not only has a good sealing effect, but also does not affect normal disassembly while preventing theft.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] A sealing device for a motor vehicle comprises a sealing part and an opener, wherein the sealing part comprises a bolt and a base, the bolt comprises a screw head and a stud, a blind hole is arranged in the axial direction of the bolt, the opening end of the blind hole is located at the screw head, a clamping device is arranged on the inner side surface of the bolt blind hole near the bottom, and is used for clamping and matching with the cross bar of the opener, a movable arc surface is arranged on the outer side of the stud of the bolt, the curvature of the movable arc surface is the same as the curvature of the outer wall of the stud, an edge of the movable arc surface parallel to the axis is connected to the rotating shaft, the rotating shaft is fixed on the outer wall of the stud, and a strip-shaped magnetic block is arranged on the other edge of the movable arc surface parallel to the axis of the stud; the base is a hollow cylinder, and circular through holes are arranged at the center positions of the bottom surface and the top surface of the base, the inner sides of the two circular through holes are arranged with the same threads, which are fastened with the bolt, and a magnet is arranged on the inner side surface of the base, and the magnet and the magnetic block attract each other;

[0007] The opener comprises a handle, a crossbar, a longitudinal bar and a coil. The handle is used for holding when in use and is provided with anti-skid particles. The longitudinal bar is fixed at one end of the handle, and a crossbar is also fixed on the longitudinal bar. The longitudinal bar part between the crossbar and the handle is wound with a coil, and a magnetic field is generated when power is turned on.

[0008] Furthermore, the clamping device is a clamping block, which is an inverted concave-shaped convex block.

[0009] Furthermore, the portion of the stud covered by the active arc surface is also recessed inside, and the depth of the recess is the same as the thickness of the active arc surface, so that when the active arc surface covers the outside of the stud, the outer surface of the stud is approximately cylindrical.

[0010] Furthermore, a thread is provided on the outwardly facing surface of the movable arc surface.

[0011] Furthermore, it also includes a fixed sealing top cover, which is located outside the screw head and is a curved surface that partially covers the screw head. A magnetic ring is provided on the surface of the fixed sealing top cover that contacts the license plate, and a rubber film is also covered on the surface of the magnetic ring that contacts the license plate.

[0012] Furthermore, an air extraction port is also provided on the top of the fixed sealing cover.

[0013] The present invention has at least the following beneficial effects:

[0014] (1) Easy to install, can be quickly disassembled through a special opener, no violent disassembly is required, and normal disassembly and use are not affected.

[0015] (2) When the movable arc surface is not affected by an external magnetic field, it will be adsorbed on the bolt. Only when it is affected by an external magnetic field will it be separated from the stud, thereby clamping it and ensuring that the stud is not easily pulled out.

[0016] (3) To open the bolt, it is necessary to close the movable arc surface and cooperate with the clamping block at the same time to unscrew the bolt, which is equivalent to providing two insurances and increasing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings in the specification which constitute a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] In the attached figure:

[0019] Figure 1 The structural diagram of the present invention is schematically shown;

[0020] Figure 2 A top view of a bolt in the present invention is schematically shown;

[0021] Figure 3 The structural diagram of the unsealing device in the present invention is schematically shown;

[0022] The above drawings include the following reference numerals:

[0023] 1-solid-sealed top cover, 11-exhaust port, 12-magnetic ring, 2-number plate, 3-base, 31-magnet, 41-blind hole, 42-rotating shaft, 43-movable arc surface, 44-magnetic block, 45-card block, 51-handle, 52-coil, 53-cross bar, 54-longitudinal bar. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present application; unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by ordinary technicians in the technical field to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0026] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0027] For ease of description, spatially relative terms, such as "on...", "above...", "on the upper surface of...", "above", etc., may be used here to describe the spatial position relationship between a device or feature and other devices or features as shown in the figures; it should be understood that the spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures.

[0028] Example

[0029] like Figures 1 to 3The shown device is a sealing device for a motor vehicle license plate 2, including a sealing member and an opener. The sealing member fixes the license plate 2 on the vehicle, and the opener is used to remove the sealing member. The sealing member includes a sealing top cover 1, bolts, and a base 3. The bolts and the base 3 are fastened by threaded cooperation. The top cover is arranged on the outside of the bolt screw head to cover the screw head part and reduce external interference with the screw head part. A movable arc surface 43 is also arranged outside the bolt. When the magnetic block 44 at the edge of the movable arc surface 43 is affected by the external magnetic field, it will leave the screw part of the bolt and expand outward. The expanded movable arc surface 43 is located in the hollow part of the base 3, so it will be stuck and can only be opened by the opener. After the opener is inserted into the blind hole 41 of the base 3, the movable arc surface 43 is retracted by the magnetic field generated by the coil 52, so that it can be easily taken out without affecting the disassembly during normal use.

[0030] The sealing cover 1 is located on the outward side of the number plate 2, covering the screw head of the bolt to reduce the impact of the external environment on the bolt part. Figure 1 As shown, the solid sealing top cover 1 is an arc surface with an elliptical cross-section. A magnetic ring 12 is arranged on the surface of the solid sealing top cover 1 that contacts the license plate 2. The shape of the magnetic ring 12 is exactly the same as the outer edge shape of the solid sealing top cover 1, and a rubber film is also covered on the surface of the magnetic ring 12 that contacts the license plate 2 to ensure the airtightness inside the solid sealing top cover 1. The magnetic ring 12 and the magnet 31 of the base 3 on the other side of the license plate 2 attract each other. An air suction port 11 is also arranged on the top of the solid sealing top cover 1. When in use, the air suction pump is connected to the air suction port 11. After the solid sealing top cover 1 is evacuated to a negative pressure state, the air suction port 11 is blocked by a rubber plug. The rubber plug is not higher than the arc surface of the solid sealing top cover 1. Since the external atmospheric pressure is greater than the gas pressure inside the solid sealing top cover 1, the atmospheric pressure will exert a pressure on the solid sealing top cover 1, and the magnetic force of the magnetic field will fix the solid sealing top cover 1 outside the bolt head.

[0031] like Figure 1 As shown, the base 3 is fixed on the mounting frame on the back of the license plate 2. The base 3 is a hollow cylinder. Circular through holes are provided at the center positions of the bottom surface and the top surface of the base 3. The centers of the two circular through holes coincide with the axis of the base. The inner sides of the two circular through holes are provided with the same threads to cooperate with the bolts. A magnet 31 is provided on the inner side surface of the cylindrical surface of the base 3.

[0032] The bolt has the same appearance as the bolt in the prior art, including a screw head and a stud. The difference is that: the screw head is not provided with a groove for fixing a screwdriver, so the bolt cannot be turned by a screwdriver. A blind hole 41 is provided in the axial direction of the bolt, and the open end of the blind hole 41 is located in the direction of the screw head. The axis of the blind hole 41 coincides with the axis of the bolt. A movable arc surface 43 is provided on the outer side of the stud of the bolt. The height of the movable arc surface 43 is less than the height of the base. The curvature of the movable arc surface 43 is the same as the curvature of the outer wall of the stud. An edge of the movable arc surface 43 parallel to the axis is connected to the rotating shaft 42. The rotating shaft 42 is fixed on the outer wall of the stud, so that the movable arc surface 43 can rotate around the rotating shaft 42. Figure 2 As shown, a strip-shaped magnetic block 44 is arranged on another edge of the movable arc surface 43 parallel to the axis of the stud, and a thread is also arranged on the arc surface of the movable arc surface 43 facing outward. When not affected by an external magnetic field, the magnetic block 44 on the movable arc surface 43 is adsorbed on the stud under the action of the magnetic field force, and the portion of the stud covered by the movable arc surface 43 is also recessed inwardly, and the depth of the recess is the same as the thickness of the movable arc surface 43, so that when the movable arc surface 43 covers the outside of the stud, the outer surface of the stud is approximately a cylinder.

[0033] It should be noted that a clamping block 45 is provided on the inner side surface of the bolt blind hole 41 near the bottom. The shape of the clamping block 45 is similar to an inverted "concave shape". After the cross bar 53 of the opener clamps the clamping block 45, the bolt can be driven to rotate.

[0034] When the bolt is completely screwed into the base 3, the bolt will not only be tightened with the threads of the through holes on the bottom and top surfaces of the base 3, but the movable arc surface 43 on the bolt will be expanded due to the action of the magnet 31 in the base 3. The expanded arc surface is larger than the diameter of the through hole of the base 3, so it can no longer be pulled out from the through hole of the base 3, thereby jamming the bolt in the position of the base 3. To remove it, the movable arc surface 43 needs to be retracted. However, the movable arc surface 43 moves under the action of the magnetic field force, so it is difficult to open the fixed connection between the bolt and the base 3 by conventional methods such as prying the lock.

[0035] It is worth noting that: the bolts and the contact surfaces of the base 3 and the number plate 2 are all provided with rubber membranes, which will prevent air leakage during the process of rotation and tightening, thereby ensuring the air tightness of the fixed cover 1.

[0036] like Figure 3The structure of the seal opener is shown, and the seal opener includes a handle 51, a cross bar 53, a longitudinal bar 54, and a coil 52. The handle 51 is used for holding during use and is provided with anti-slip particles. The longitudinal bar 54 is fixed at one end of the handle 51, and the cross bar 53 is also fixed on the longitudinal bar 54. The longitudinal bar 54 will be placed in the blind hole 41 of the bolt during use, and the end of the longitudinal bar 54 will contact the bottom of the blind hole 41. The position of the cross bar 53 on the longitudinal bar 54 corresponds to the position of the block 45 on the inner wall of the blind hole 41. The cross bar 53 is stuck in the groove of the block 45, so that the bolt can be rotated by rotating the seal opener. The longitudinal bar 54 between the cross bar 53 and the handle 51 is wound with a coil 52, and the coil 52 is connected to the power supply through a wire. A magnetic field is generated after power is turned on. The magnetic field direction of the magnetic field is opposite to the magnetic field direction of the magnetic block 44 on the active arc surface 43, and the magnetic field intensity is greater, so that the active arc surface 43 is pulled back to the stud for fixing.

[0037] It should be noted that the magnetism of the magnet 31 in the base 3 is opposite to that of the magnet block 44 on the movable arc surface 43, and is the same as the magnetic field entangled by the coil 52 after power is supplied, and is smaller than the magnetic field force of the coil 52 after power is supplied.

[0038] The installation process of the present invention is as follows: first place the license plate 2 on the designated installation position of the motor vehicle, align the through hole on the license plate 2 with the through hole of the base 3 on the mounting frame, pass the bolt through the license plate 2 and fasten it with the through hole of the base 3 through threaded cooperation, as the bolt is screwed in, when the movable arc surface 43 is completely located in the base 3, the movable arc surface 43 is disengaged from the stud and unfolded by the magnetic field force of the magnet 31 on the side wall of the base 3, and the unfolded movable arc surface 43 clamps the bolt in the base 3, and the license plate 2 between the two is also fixed, and then cover the solid sealing top cover 1, and block the exhaust port 11 after the negative pressure is evacuated.

[0039] The disassembly process of the present invention is as follows: remove the sealing plug of the air exhaust port 11 of the solid-sealed top cover 1, and after removing the solid-sealed top cover 1, extend the longitudinal rod 54 of the opener into the blind hole 41 in the bolt, rotate the opener so that the clamping block 45 of the opener is clamped with the cross bar 53, turn on the power of the coil 52, and the magnetic field of the coil 52 will adsorb the active arc surface 43 onto the stud, so that the bolt can be screwed out of the base 3. However, after use, it is necessary to detect the magnetic field strength of the magnet 31 of the base 3, because the magnetic block 44 of the base 3 is located in the larger magnetic field generated by the coil 52, so its magnetic field size may be affected. If its magnetic field strength is too low, it needs to be replaced, otherwise the active arc surface 43 cannot be unfolded.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0041] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the above claims, any one of the claimed embodiments may be used in any combination. The information disclosed in this background technology section is intended only to deepen the understanding of the overall background technology of the present invention and should not be regarded as an admission or in any form of implication that the information constitutes prior art known to the skilled person or technician.

Claims

1. A sealing device for a motor vehicle, characterized in that: The invention comprises a sealing part and an opener, wherein the sealing part comprises a bolt and a base, wherein the bolt comprises a screw head and a stud, a blind hole is arranged in the axial direction of the bolt, the opening end of the blind hole is located at the screw head, a clamping device is arranged on the inner side surface of the bolt blind hole near the bottom, which is used for clamping and matching with the cross bar of the opener, a movable arc surface is arranged on the outer side of the stud of the bolt, the curvature of the movable arc surface is the same as the curvature of the outer wall of the stud, an edge of the movable arc surface parallel to the axis is connected to the rotating shaft, the rotating shaft is fixed on the outer wall of the stud, and a strip-shaped magnetic block is arranged on the other edge of the movable arc surface parallel to the axis of the stud; the base is a hollow cylinder, and circular through holes are arranged at the center positions of the bottom surface and the top surface of the base, the inner sides of the two circular through holes are arranged with the same threads, which are fastened with the bolt, and a magnet is arranged on the inner side surface of the base, and the magnet and the magnetic block attract each other; the opener comprises a handle, a cross bar, a longitudinal bar, and a coil, the handle is used for holding when in use, and anti-slip particles are arranged on it, The longitudinal rod is fixed at one end of the handle, and a crossbar is also fixed on the longitudinal rod. The longitudinal rod part between the crossbar and the handle is wrapped with a coil, which generates a magnetic field after power is turned on; the clamping device is a clamping block, which is an inverted concave convex block.

2. A sealing device for a motor vehicle according to claim 1, characterized in that: The portion of the stud covered by the active cambered surface is also recessed inside, and the depth of the recess is the same as the thickness of the active cambered surface, so that when the active cambered surface covers the outside of the stud, the outer surface of the stud is approximately cylindrical.

3. A sealing device for a motor vehicle according to claim 1, characterized in that: The outwardly facing surface of the movable arc surface is also provided with a thread.

4. A sealing device for a motor vehicle according to claim 1, characterized in that: It also includes a fixed sealing top cover, which is located outside the screw head and is an arc surface that partially covers the screw head. A magnetic ring is arranged on the surface of the fixed sealing top cover that contacts the license plate, and a rubber film is also covered on the surface of the magnetic ring that contacts the license plate.

5. A sealing device for a motor vehicle according to claim 4, characterized in that: The top of the fixed sealing cover is also provided with an air extraction port.

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