Anti-disassembly safety screw

Abstract

The utility model relates to the technical field of anti-dismantling safety screws, and discloses an anti-dismantling safety screw which comprises a rotating cover, a rotating body is fixedly connected to the side wall of one end of the rotating cover, a plurality of evenly-surrounding connecting threads are fixedly formed in the side wall of the outer side of the rotating body, and a cross-shaped groove is formed in the end, away from the rotating body, of the rotating cover. And a mounting layer is fixedly mounted under the cross-shaped groove. A cross-shaped groove is formed in the upper portion of a rotary cover, sliding blocks are installed in four cavities formed by the cross-shaped groove in a sliding mode, a first long-strip gear is fixedly connected to one end of each sliding block, a second gear and a third long-strip gear are rotatably arranged on each first long-strip gear in an engaged mode, and a compressible elastic column is fixedly installed at one end of each third long-strip gear. The fan-shaped blocking column is fixedly installed over the elastic column, the fan-shaped blocking column can penetrate through the round hole to extend to the outer side, at the moment, the screw can be disassembled through a special tool, the disassembling difficulty of the screw is improved, and meanwhile the anti-theft performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-disassembly safety screws, in particular to anti-disassembly safety screws. Background Art

[0002] Screws are tools that use the physics and mathematical principles of the circular rotation of the inclined surface of an object and the friction force to gradually fasten objects and mechanical parts. Screws are a general term for fasteners. Screws are indispensable industrial necessities in daily life: such as very small screws used in cameras, glasses, clocks, electronics, etc.; general screws for televisions, electrical products, musical instruments, furniture, etc.; as for engineering, construction, and bridges, large screws and nuts are used; transportation equipment, airplanes, trams, cars, etc. use both large and small screws. Screws have important tasks in industry, and as long as there is industry on the earth, the function of screws will always be important.

[0003] The application number is 201120476043.9, which discloses a screw, including a screw body with threads, a pan head at the upper end of the screw body, a slot for convenient insertion of a screwdriver on the pan head, and a countersunk hole at the bottom of the slot. The utility model overcomes the shortcomings of the prior art and provides a screw with good connection effect, simple structure and practicality.

[0004] However, there are some shortcomings. The screw is easy to disassemble, does not have a certain anti-disassembly function, and has low safety performance. Utility Model Content

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is an anti-disassembly safety screw, comprising a rotating cover and a round hole, wherein a rotating body is fixedly connected to a side wall at one end of the rotating cover, a plurality of evenly surrounding connecting threads are fixedly provided on the outer side wall of the rotating body, a cross groove is provided at one end of the rotating cover away from the rotating body, and a mounting layer is fixedly installed directly below the cross groove.

[0007] Furthermore, the cross groove forms four installation cavities, a first groove is provided at one end of the installation cavity close to the side wall, a second groove is provided at the bottom of the first groove, a circular hole is fixedly provided at the central axis of the cross groove, a cavity one is provided inside the installation layer, the circular hole and the second groove are connected to the installation layer, and a plurality of sliding components are fixedly installed inside the cavity one.

[0008] Furthermore, the sliding assembly includes a slider, which is slidably installed in the first groove, and one end of the slider away from the circular hole is fixedly connected to a long gear one, and a plurality of evenly arranged tooth blocks are fixedly installed on the side wall directly below the long gear one.

[0009] Furthermore, a gear 2 is installed in meshing and rotation directly below the long gear 1, a fixed column is installed on the central axis of the gear 2, both ends of the fixed column extend to the side wall of the mounting layer and are fixedly connected thereto, and a long gear 3 is installed in meshing and rotation directly below the gear 2.

[0010] Furthermore, a retractable elastic column is fixedly installed just above a side wall of the long gear three away from the cavity, and a fan-shaped blocking column is fixedly installed at one end of the elastic column away from the long gear three.

[0011] Furthermore, a circular hole through which a cylinder can pass is formed between the sector-shaped blocking columns, and a circle of conical surface is fixedly installed around one end of the rotating body close to the rotating cover.

[0012] The utility model has the following beneficial effects:

[0013] (1) The utility model has a cross groove formed above the rotating cover, and a slider is installed for sliding inside the four cavities formed by the cross groove. One end of the slider is fixedly connected to a long gear 1, which meshes and rotates with a gear 2, which meshes and rotates with a long gear 3. A compressible elastic column is fixedly installed at one end of the long gear 3, and a fan-shaped blocking column is fixedly installed just above the elastic column. The fan-shaped blocking column can extend to the outside through the circular hole. Only then can the screw be removed by using a special tool, which increases the difficulty of removing the screw and also improves the anti-theft performance.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a complete structural diagram of the utility model;

[0017] Figure 2 It is a partial enlarged structural schematic diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional side structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 5This is a schematic diagram of the structure between the gears of the utility model;

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] In the figure: 1, rotating cover; 11, rotating body; 12, connecting thread; 2, cross groove; 21, first groove; 22, slider; 23, round hole; 3, mounting layer; 31, cavity one; 32, second groove; 33, long gear one; 331, tooth block; 34, gear two; 341, fixed column; 35, long gear three; 36, elastic column; 37, fan-shaped blocking column; 4, cone surface. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-Figure 5 As shown, the utility model is an anti-disassembly safety screw, comprising a rotating cover 1 and a circular hole 23, a rotating body 11 is fixedly connected to the side wall at one end of the rotating cover 1, a plurality of evenly surrounding connecting threads 12 are fixedly provided on the outer side wall of the rotating body 11, a cross groove 2 is provided at one end of the rotating cover 1 away from the rotating body 11, and a mounting layer 3 is fixedly installed directly below the cross groove 2.

[0025] The cross groove 2 forms four installation cavities, and a first groove 21 is provided at one end of the installation cavity close to the side wall, a second groove 32 is provided at the bottom of the first groove 21, a circular hole 23 is fixedly provided at the central axis of the cross groove 2, a cavity 31 is provided inside the installation layer 3, the circular hole 23 and the second groove 32 are connected to the installation layer 3, and a plurality of sliding components are fixedly installed inside the cavity 31.

[0026] The sliding assembly includes a slider 22, which is slidably installed in the first groove 21. One end of the slider 22 away from the circular hole 23 is fixedly connected to a long gear 33, and a plurality of evenly arranged tooth blocks 331 are fixedly installed on the side wall just below the long gear 33.

[0027] A gear 2 34 is installed in meshing and rotation directly below the long gear 1 33 , a fixing column 341 is installed on the central axis of the gear 2 34 , both ends of the fixing column 341 extend to the side wall of the mounting layer 3 and are fixedly connected thereto, and a long gear 3 35 is installed in meshing and rotation directly below the gear 2 34 .

[0028] A retractable elastic column 36 is fixedly installed just above the long gear three 35 away from the side wall of the cavity one 31 , and a fan-shaped blocking column 37 is fixedly installed at one end of the elastic column 36 away from the long gear three 35 .

[0029] A cylinder is formed between the sector-shaped blocking columns 37 and can pass through the circular hole 23 . A cone surface 4 is fixedly mounted around one end of the rotating body 11 close to the rotating cover 1 .

[0030] When in use, a cross groove 2 is opened on the top of the rotating cover 1, and sliders 22 are slidably installed in the four cavities formed by the cross groove 2. First, four sliders 22 are slid. One end of the slider 22 is fixedly connected to a long gear 1 33, and the long gear 1 33 is meshed and rotated with a gear 2 34, and the gear 2 34 is meshed and rotated with a long gear 35. A compressible elastic column 36 is fixedly installed on one end of the long gear 35, and a fan-shaped blocking column 37 is fixedly installed just above the elastic column 36. The fan-shaped blocking column 37 can extend to the outside through the circular hole 23. Only then can the screw be removed using a special tool, which increases the difficulty of disassembly while also improving the anti-theft performance.

[0031] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An anti-disassembly safety screw, comprising a rotating cover (1) and a circular hole (23), wherein a rotating body (11) is fixedly connected to a side wall at one end of the rotating cover (1), and a plurality of evenly surrounding connecting threads (12) are fixedly provided on an outer side wall of the rotating body (11), characterized in that: The rotating cover (1) has a cross groove (2) at one end away from the rotating body (11), and a mounting layer (3) is fixedly mounted directly below the cross groove (2); A cavity one (31) is provided inside the installation layer (3); the circular hole (23) and the second groove (32) are in communication with the installation layer (3); and a plurality of sliding components are fixedly installed inside the cavity one (31).

2. The anti-tampering safety screw according to claim 1, characterized in that: The cross groove (2) forms four installation cavities, one end of the installation cavity close to the side wall is provided with a first groove (21), the bottom of the first groove (21) is provided with a second groove (32), and a round hole (23) is fixedly provided at the center axis of the cross groove (2).

3. The anti-tampering safety screw according to claim 2, characterized in that: The sliding assembly comprises a sliding block (22), wherein the sliding block (22) is slidably mounted inside the first groove (21), and one end of the sliding block (22) away from the circular hole (23) is fixedly connected to a long gear (33), and a plurality of evenly arranged tooth blocks (331) are fixedly mounted on the side wall directly below the long gear (33).

4. The anti-tampering safety screw according to claim 3, characterized in that: A second gear (34) is mounted in meshing rotation directly below the first long gear (33); a fixing column (341) is mounted on the central axis of the second gear (34); both ends of the fixing column (341) extend to the side wall of the mounting layer (3) and are fixedly connected thereto; and a third long gear (35) is mounted in meshing rotation directly below the second gear (34).

5. The anti-tampering safety screw according to claim 4, characterized in that: A retractable elastic column (36) is fixedly mounted on the upper side of the long gear three (35) away from the side wall of the cavity one (31), and a fan-shaped blocking column (37) is fixedly mounted on one end of the elastic column (36) away from the long gear three (35).

6. The tamper-proof safety screw according to claim 5, characterized in that: A cylinder is formed between the fan-shaped blocking columns (37) and can pass through the circular hole (23). A cone surface (4) is fixedly mounted around one end of the rotating body (11) close to the rotating cover (1).

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