Anti-disassembly screw

Abstract

The utility model provides an anti-disassembly screw, which belongs to the technical field of mechanical fasteners and comprises a screw head part, a rod part and an anti-disassembly part. And the protection part arranged in the inner cavity of the main working surface is of a one-way four-tooth structure with an angle. Under the design of the special inclination angle of the main working face, the special-shaped screw can be easily screwed in through a conventional cross screwdriver, and due to the one-way tooth structure, most disassembling tools on the market cannot disassemble the special-shaped screw. The anti-disassembly driving groove has the advantages that various head types can be matched according to fastening requirements, and the anti-disassembly driving groove can be quickly mounted and cannot be disassembled. The system can be widely applied to the fields of security and burglary prevention.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical fasteners, specifically relating to anti-tamper screws. Background Technology

[0002] Anti-tamper screws, as key safety fasteners, have important application value in public facilities, power equipment, communication base stations and other fields.

[0003] Existing anti-tamper screws still have significant shortcomings in practical use. Although traditional irregular groove structures can prevent disassembly with ordinary tools, their anti-tampering effect is limited when faced with professional demolition tools. Some products rely too much on complex structures, which makes installation difficult and affects construction efficiency. More seriously, existing anti-tamper screws often fail to provide effective protection when subjected to violent damage, and may even exacerbate safety hazards due to structural failure. Utility Model Content

[0004] The purpose of this invention is to provide anti-tamper screws, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The tamper-proof screw includes a screw head, a main working surface on its top surface, an tamper-proof part disposed in the inner cavity of the main working surface, and a threaded shank disposed on the bottom surface of the screw head.

[0007] As a preferred embodiment of the present invention, the anti-disassembly part includes an anti-disassembly groove formed in the inner cavity of the screw head, a serrated groove formed at the edge of the anti-disassembly groove, and a stress concentration groove formed at the extended end of the inner cavity of the anti-disassembly groove.

[0008] As a preferred embodiment of this utility model, the anti-tampering part is a unidirectional four-tooth structure, and the four-tooth structure has a certain angle, which is 26°30′.

[0009] As a preferred embodiment of this utility model, the height of the sawtooth groove is 0.2 mm, and the spacing between adjacent sawtooths is divided into four equal parts.

[0010] As a preferred embodiment of this utility model, the anti-disassembly groove is a one-way tooth structure, and its geometric center coincides with the center of the screw head.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: Due to the special tilt angle design of the main working surface, conventional screwdrivers struggle to obtain an effective point of leverage during disassembly. The symmetrical four-groove design allows conventional Phillips head screwdrivers to be matched and screwed in. The precise parameters of the serrated grooves form an anti-slip barrier at the microscopic level, while the stress concentration grooves guide controllable fracture during violent disassembly, protecting the integrity of the threads while leaving obvious signs of damage. The coaxial design of the threaded shank and the optimized helix angle significantly improve installation efficiency, enabling construction personnel to complete installation quickly and accurately. This allows the anti-tamper screw to maintain excellent anti-tamper performance while greatly improving construction convenience and service life. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the anti-disassembly part structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0016] Figure 4 This is a plan view of the anti-disassembly structure of this utility model.

[0017] In the diagram: 110, screw head; 120, main working surface; 130, anti-dismantling part; 131, anti-dismantling groove; 132, serrated groove; 133, stress concentration groove; 140, threaded rod; 141, rod body; 142, threaded groove; 143, bottom bearing surface. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] Example

[0022] Reference Figures 1-4 This is an embodiment of the present utility model, which provides an anti-tamper screw, including a screw head 110, a main working surface 120 on its top surface, an anti-tamper part 130 disposed in the inner cavity of the main working surface 120, and a threaded rod part 140 disposed on the bottom surface of the screw head 110.

[0023] The main working surface 120 adopts a special tilt angle design, which allows conventional screwdrivers to be screwed in normally. The one-way tooth structure makes it impossible to disassemble. The tilt surface forms a specific angle with the horizontal plane, which not only ensures the matching accuracy of the special tool, but also effectively engages with the standard Phillips screwdriver.

[0024] Specifically, the anti-tamper part 130 includes an anti-tamper groove 131 formed in the inner cavity of the screw head 110, a serrated groove 132 formed at the edge of the anti-tamper groove 131, and a stress concentration groove 133 formed at the extended end of the inner cavity of the anti-tamper groove 131.

[0025] Furthermore, the anti-tamper part 130 has a unidirectional four-tooth structure with a certain angle of 26°30′.

[0026] Furthermore, the height of the 132 saw teeth in the sawtooth groove pattern is 0.2 mm, and the spacing between adjacent saw teeth is divided into four equal parts.

[0027] Furthermore, the anti-tamper groove 131 has a unidirectional tooth structure, and its geometric center does not coincide with the center of the screw head 110. The eccentricity distance is one-quarter of the radius of the screw head 110.

[0028] The rod 141 and the screw head are coaxially connected, which ensures the centering during installation and enables construction personnel to quickly position the screw.

[0029] It should be noted that the anti-tamper screw is made of high-strength alloy steel and undergoes a special heat treatment process to achieve the optimal balance of overall screw hardness. The screw head 110 has moderate hardness to ensure the machining accuracy of the anti-tamper groove 131, while the threaded part has high hardness to ensure connection strength and effectively prevent deformation and damage during installation.

[0030] When in use or during installation, a standard Phillips screwdriver precisely matches the tilt angle of the main working face 120 and the four-tooth unidirectional structure of the anti-disassembly groove 131, and achieves smooth screwing through the coaxially designed threaded rod 140.

[0031] The entire process utilizes a special heat treatment process to achieve the optimal hardness match between the screw head 110 and the threaded shank 140, ensuring both ease of installation and multiple layers of anti-disassembly protection.

[0032] In summary, the special tilt angle design of the main working surface 120 allows for an effective point of force application with conventional screwdrivers. The anti-tamper groove 131, combined with the eccentric design, makes it incompatible with most disassembly tools on the market. The precise parameters of the serrated groove 132 form an anti-slip barrier at the microscopic level, while the stress concentration groove 133 guides controlled fracture during violent disassembly, protecting the integrity of the thread while leaving obvious signs of damage. The coaxial design and optimized helix angle of the threaded shank 140 significantly improve installation efficiency, enabling construction personnel to complete the installation quickly and accurately. This allows the anti-tamper screw to maintain excellent anti-tamper performance while greatly improving construction convenience and service life.

[0033] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0034] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0035] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. Anti-tamper screw, characterized in that: It includes a screw head (110), a main working surface (120) on its top surface, an anti-disassembly part (130) disposed in the cavity of the main working surface (120), and a threaded rod part (140) disposed on the bottom surface of the screw head (110).

2. The tamper-proof screw according to claim 1, characterized in that: The anti-disassembly part (130) includes an anti-disassembly groove (131) formed in the inner cavity of the screw head (110), a serrated groove (132) formed at the edge of the anti-disassembly groove (131), and a stress concentration groove (133) formed at the extended end of the inner cavity of the anti-disassembly groove (131).

3. The tamper-proof screw according to claim 2, characterized in that: The anti-tamper part (130) is a unidirectional four-tooth structure with a certain angle of 26°30′.

4. The tamper-proof screw according to claim 3, characterized in that: The height of the saw teeth in the sawtooth groove (132) is 0.5 mm, and the spacing between adjacent saw teeth is four equal parts.

5. The tamper-proof screw according to claim 4, characterized in that: The anti-disassembly groove (131) has a one-way tooth structure, and its geometric center coincides with the center of the screw head (110).

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