Special-shaped anti-disassembly self-tapping screw

Abstract

The utility model discloses a special-shaped anti-dismantle self-tapping screw, and relates to the technical field of self-tapping screws, the special-shaped anti-dismantle self-tapping screw comprises a screw body and a self-tapping thread, the top of the screw body is provided with a screw cap, the top of the screw cap is provided with a square groove group, the square groove group is internally provided with a connecting block, the outer wall of the screw body is provided with a rotating disc, and the rotating disc is provided with a rotating shaft. A plurality of occlusion rulers are integrally formed on the bottom surface of the rotating disc, and a butt joint groove is formed in the top surface of the rotating disc; according to the utility model, the square groove group is arranged to be matched with the occlusion ruler, and a plurality of parts are arranged between the square groove group and the occlusion ruler, so that the nail body cannot be easily screwed out under the condition that an adaptive tool is not used after the nail body is screwed into a plate, and the fixing stability of the nail body is improved.

Description

Technical Field

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

[0002] With the rapid development of modern industrial technology, fasteners are increasingly used in many fields such as mechanical equipment, electronic equipment, and building installation. Although traditional self-tapping screws have the advantages of easy installation and reliable fastening, their anti-disassembly performance is insufficient in some application scenarios with extremely high safety requirements, such as electronic equipment packaging and automobile key component connection.

[0003] There are many types of self-tapping screws on the current market, mainly including ordinary self-tapping screws, self-cutting self-tapping screws, self-extruding self-tapping screws and self-drilling self-tapping screws. These screws meet various connection requirements to varying degrees, but there are still obvious shortcomings in anti-dismantling performance. Although ordinary self-tapping screws and self-cutting self-tapping screws can form threads in the material by themselves, their head and groove designs are relatively simple and can be easily disassembled by ordinary tools. Although self-extruding self-tapping screws have improved the connection strength through special thread design, they have not made special optimizations in terms of anti-dismantling. Other self-tapping screws have also not made any progress in terms of anti-dismantling.

[0004] In view of this, a special-shaped anti-tampering self-tapping screw is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of the utility model is to provide a special-shaped anti-disassembly self-tapping screw to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the utility model provides a special-shaped anti-dismantling self-tapping screw, including a nail body and a self-tapping thread, a nail cap is arranged on the top of the nail body, a square groove group is arranged on the top of the nail cap, a connecting block is arranged inside the square groove group, a rotating disk is arranged on the outer wall of the nail body, a plurality of bite rulers are integrally formed on the bottom surface of the rotating disk, and a docking groove is opened on the top surface of the rotating disk.

[0007] Furthermore, the square groove group consists of a square groove and four rectangular grooves, wherein two opposite rectangular grooves have through grooves formed inside, the connecting block is located inside the through groove, and the connecting block is adapted to the docking groove.

[0008] Furthermore, a contact plate is fixedly connected to the top surface of the connecting block, and the contact plate is adapted to the rectangular groove in the square groove group.

[0009] Furthermore, a circular groove is provided inside the square groove group, a reset spring is fixedly connected to the bottom of the inner wall of the circular groove, and the other end of the reset spring is fixedly connected to the contact plate.

[0010] Furthermore, a limit plate is fixedly mounted on the outer wall of the nail body, the specific number of the limit plates is two, and the rotating plate is rotatably mounted between the two limit plates.

[0011] Furthermore, a fine reverse edge opposite to the cutting edge of the bite ruler is arranged on the outer wall of the bite ruler.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] By providing a square slot group in conjunction with a bite ruler and providing a plurality of components between the square slot group and the bite ruler, after the nail body is screwed into the interior of the plate, the nail body cannot be easily screwed out without using an adapter tool, thereby increasing the stability of the nail body fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the side of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure inside the utility model;

[0017] Figure 4 for Figure 3 Enlarged structural diagram at A in the middle.

[0018] In the figure: 1. nail body; 2. self-tapping thread; 3. nail cap; 4. square groove group; 5. rotating disk; 6. bite ruler; 7. docking groove; 8. contact plate; 9. through groove; 10. connecting block; 11. circular groove; 12. reset spring; 13. limit disk. DETAILED DESCRIPTION

[0019] 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.

[0020] Embodiment 1

[0021] See also Figure 1-4A special-shaped anti-disassembly self-tapping screw comprises a nail body 1 and a self-tapping thread 2. A nail cap 3 is arranged on the top of the nail body 1, a square groove group 4 is arranged on the top of the nail cap 3, a connecting block 10 is arranged inside the square groove group 4, a rotating disk 5 is arranged on the outer wall of the nail body 1, a plurality of bite rulers 6 are integrally formed on the bottom surface of the rotating disk 5, and a docking groove 7 is opened on the top surface of the rotating disk 5.

[0022] For further information, see Figure 1-2 The square groove group 4 consists of a square groove and four rectangular grooves, wherein two opposite rectangular grooves are provided with through grooves 9, and the connecting block 10 is located inside the through groove 9, and the connecting block 10 is adapted to the docking groove 7. A contact plate 8 is fixedly connected to the top surface of the connecting block 10, and the contact plate 8 is adapted to the rectangular grooves in the square groove group 4.

[0023] By setting the square slot group 4 to consist of a square slot and four rectangular slots, the user needs to prepare a specific tool that is compatible with the square slot group 4 to drive the nail body 1 to rotate if he wants to twist the nail body 1. If a tool that is compatible with a rectangular slot or a square slot in the square slot group 4 is used alone to twist the nail body 1, sufficient force cannot be exerted, thereby achieving a preliminary anti-dismantling effect.

[0024] By setting the through slot 9, and setting the connecting block 10 inside the through slot 9, and finally setting a fixed connecting contact plate 8 above the connecting block 10, and the contact plate 8 is adapted to the square slot group 4, the connecting block 10 can be inserted into the docking slot 7 opened on the top surface of the rotating disk 5 through the through slot 9. When the connecting block 10 is inserted into the docking slot 7, the user drives the nail cap 3 to rotate, which can drive the rotating disk 5 to rotate.

[0025] For further information, see Figure 4 A circular groove 11 is opened inside the square groove group 4, and a return spring 12 is fixedly connected to the bottom of the inner wall of the circular groove 11, and the other end of the return spring 12 is fixedly connected to the contact plate 8. By setting the return spring 12 connected between the bottom of the inner wall of the circular groove 11 and the bottom of the contact plate 8, the contact plate 8 can be reset by the elastic force of the return spring 12 after losing the contact. The existence of the circular groove 11 allows the return spring 12 to retract into the circular groove 11 after the contact plate 8 is compressed, thereby preventing the return spring 12 from being damaged.

[0026] In addition, a limiting disk 13 is fixedly installed on the outer wall of the nail body 1 . The specific number of the limiting disks 13 is two, and the rotating disk 5 is rotatably installed between the two limiting disks 13 .

[0027] It should be noted that a small reverse blade is provided on the outer wall of the bite ruler 6, which is opposite to the cutting edge of the bite ruler 6. By providing the small reverse blade opposite to the cutting edge of the bite ruler 6, the small reverse blade will get stuck in the wood during the reversal process of the bite ruler 6, making it more difficult to unscrew the nail body 1.

[0028] In addition, the sizes and proportions of the various parts in the present invention are not fixed and can be adjusted according to the specific needs of the user.

[0029] During specific implementation, when the user uses the utility model to connect the plates, he can directly use the tool compatible with the square groove group 4 to screw the nail body 1 into the interior of the device. When it is screwed until the bite ruler 6 fits the surface of the plate, the user needs to press down the adapter tool and embed the connecting block 10 into the docking groove 7, and then continue to rotate. At this time, driven by the adapter tool, the bite ruler 6 will be directly embedded into the surface of the plate. After screwing until the bite ruler 6 is completely embedded in the interior of the plate, the installation of the nail body 1 is completed.

[0030] It should be noted that the specific number of the docking slots 7 is not fixed and can be adjusted according to actual conditions so that the connecting block 10 can be more easily embedded in the docking slot 7.

[0031] When a non-user wants to remove the nail body 1, he first needs a tool that can be inserted into a certain part of the square groove group 4 to apply force to the nail body 1. At the same time, if it can only fit into a certain part, the removal personnel cannot exert full force, which increases the difficulty of removal.

[0032] After the bite ruler 6 is embedded in the plate, if the demolition personnel cannot simultaneously resist the two connecting blocks 10 from descending, the rotating disk 5 will not be subjected to direct force and will not be able to rotate easily. Under the restriction of the two limit plates 13, if the nail body 1 wants to be screwed out of the screw hole, the bite ruler 6 must be removed from the plate at the same time. It is well known that the force required for the initial removal of the nail body 1 is the greatest. With the bite ruler 6 embedded in the plate, the demolition personnel cannot easily remove the nail body 1 without using an adapter tool.

[0033] By setting the square groove group 4 to cooperate with the bite ruler 6, and setting multiple components between the square groove group 4 and the bite ruler 6, after the nail body 1 is screwed into the inside of the plate, it cannot be easily screwed out without using an adapter tool, thereby increasing the stability of the fixation of the nail body 1.

[0034] Working principle: When the user uses the utility model to connect the plates, he can directly use the tool adapted to the square groove group 4 to screw the nail body 1 into the inside of the device. When screwing it until the bite ruler 6 fits the surface of the plate, the user needs to press down the adapter tool and embed the connecting block 10 into the docking groove 7 at the same time, and then continue to rotate. At this time, driven by the adapter tool, the bite ruler 6 will be directly embedded into the surface of the plate. After screwing it until the bite ruler 6 is completely embedded into the inside of the plate, the installation of the nail body 1 is completed.

[0035] When a non-user wants to remove the nail body 1, he first needs a tool that can be inserted into a certain part of the square groove group 4 to apply force to the nail body 1. At the same time, if it can only fit into a certain part, the removal personnel cannot exert full force, which increases the difficulty of removal.

[0036] After the bite ruler 6 is embedded in the plate, if the demolition personnel cannot simultaneously resist the two connecting blocks 10 from descending, the rotating disk 5 will not be subjected to direct force and will not be able to rotate easily. Under the restriction of the two limit plates 13, if the nail body 1 wants to be screwed out of the screw hole, the bite ruler 6 must be removed from the plate at the same time. It is well known that the force required for the initial removal of the nail body 1 is the greatest. With the bite ruler 6 embedded in the plate, the demolition personnel cannot easily remove the nail body 1 without using an adapter tool.

[0037] By setting the square groove group 4 to cooperate with the bite ruler 6, and setting multiple components between the square groove group 4 and the bite ruler 6, after the nail body 1 is screwed into the inside of the plate, it cannot be easily screwed out without using an adapter tool, thereby increasing the stability of the fixation of the nail body 1.

Claims

1. A special-shaped anti-tampering self-tapping screw, comprising a screw body (1) and a self-tapping thread (2), characterized in that: A nail cap (3) is arranged on the top of the nail body (1), a square groove group (4) is arranged on the top of the nail cap (3), a connecting block (10) is arranged inside the square groove group (4), a rotating disk (5) is arranged on the outer wall of the nail body (1), a plurality of bite scales (6) are integrally formed on the bottom surface of the rotating disk (5), and a docking groove (7) is provided on the top surface of the rotating disk (5).

2. The special-shaped anti-tampering self-tapping screw according to claim 1, characterized in that: The square groove group (4) consists of a square groove and four rectangular grooves, wherein two opposite rectangular grooves have through grooves (9) formed inside, and the connecting block (10) is located inside the through groove (9), and the connecting block (10) is adapted to the docking groove (7).

3. The special-shaped anti-tampering self-tapping screw according to claim 2, characterized in that: A contact plate (8) is fixedly connected to the top surface of the connecting block (10), and the contact plate (8) is adapted to fit the rectangular groove in the square groove group (4).

4. The special-shaped anti-tampering self-tapping screw according to claim 1, characterized in that: A circular groove (11) is provided inside the square groove group (4), a return spring (12) is fixedly connected to the bottom of the inner wall of the circular groove (11), and the other end of the return spring (12) is fixedly connected to the contact plate (8).

5. The special-shaped anti-tampering self-tapping screw according to claim 1, characterized in that: A limit plate (13) is fixedly mounted on the outer wall of the nail body (1), the specific number of the limit plates (13) is two, and the rotating plate (5) is rotatably mounted between the two limit plates (13).

6. The special-shaped anti-tampering self-tapping screw according to claim 1, characterized in that: The outer wall of the bite ruler (6) is provided with a fine reverse edge opposite to the edge of the bite ruler (6).

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