CN218913440U

CN218913440U - Antitheft screw

Info

Publication number: CN218913440U
Application number: CN202223219543.1U
Authority: CN
Inventors: 李小鹏
Original assignee: Guangzhou Hanma Electronics Co ltd
Current assignee: Guangzhou Hanma Electronics Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-04-25
Anticipated expiration: 2032-12-01

Abstract

The application discloses anti-theft screw, it includes screw rod, stopper and nut, one side of stopper with the screw rod is connected, the opposite side of stopper connect in the nut, the cross sectional area of nut is from being close to one side of stopper is kept away from one side of stopper is gradually wide trend, the cross sectional area of stopper is greater than the nut is close to the cross sectional area of the one end of stopper. The screw cap is fixed by a screw driver, the screw rod and the limiting block are screwed into the fastener to be fastened by the worker, and then the force is continuously applied to twist off the screw cap, and the anti-theft limiting block is left, so that the disassembly difficulty of the anti-theft screw is greatly improved, namely the anti-theft effect of the anti-theft screw is improved; the effect of the applicability of the anti-theft screw is improved.

Description

Antitheft screw

Technical Field

The application relates to the technical field of screws, in particular to an antitheft screw.

Background

The antitheft screw is also called as an anti-disassembly screw, and is a fastener which is produced to prevent the fixed facilities which are placed in outdoor public places for a long time from being stolen; the anti-theft screw has wider application range, for example, in the field of automobile accessory manufacturing, the production and use requirements of the anti-theft screw are larger, and the screw of the type can be taken out only by using a special tool, so that the anti-theft screw has an anti-theft effect.

The anti-theft screw is mainly divided into a detachable anti-theft screw and a detachable anti-theft screw, wherein the detachable anti-theft screw is inconvenient in the installation process of a special installation tool matched with the anti-theft screw, and is not suitable for mass production; meanwhile, the existing anti-theft screw can be locked or disassembled by using a special matched tool, and most of special disassembling tools can still be imitated, so that a certain improvement space still exists for the anti-theft effect of the anti-theft screw.

Disclosure of Invention

In order to further improve the anti-theft effect of the anti-theft screw, the application provides the anti-theft screw.

The application provides an antitheft screw, adopts following technical scheme:

an antitheft screw, comprising: screw rod, stopper and nut, one side of stopper with the screw rod is connected, the opposite side of stopper connect in the nut, the cross sectional area of nut is gradually wide trend from being close to one side of stopper towards keeping away from one side of stopper, the cross sectional area of stopper is greater than the cross sectional area that the nut is close to one end of stopper.

By adopting the technical scheme, the screw is used for being in threaded fixed connection with the fastener to be fastened, and the limiting block is used for limiting the screw at the screw hole position of the fastener to be fastened; the cross section area of the joint of the nut and the limiting block is smaller than that of the limiting block, namely, the middle of the nut is in a necking design, and the torque of the nut is determined according to the diameter of the necking design; the method comprises the steps that in the process of locking an anti-theft screw on a to-be-fastened piece by a worker, after the screw rod is aligned to a screw hole of the to-be-fastened piece, the screw rod and a limiting block are screwed into the to-be-fastened piece by applying force after the screw cap is fixed by a screw driver, the limiting block is continuously applied with force to twist off the necking part of the screw cap by torque, and the anti-theft limiting block is left, and meanwhile, the anti-theft screw is locked; at the moment, the limiting block is sunk into a product to be fastened, the stress point is smaller, and the nut at the stress point is detached, so that the detachment difficulty of the anti-theft screw is greatly improved, namely the anti-theft effect of the anti-theft screw is improved; further, the nut can use common hexagonal heads, round heads and the like, and when in installation, a customized tool is not required to be used for installation, so that the difficulty of mass production and use is reduced, and the applicability of the antitheft screw is improved.

Preferably, the nut is a ferromagnetic metal.

Through adopting above-mentioned technical scheme, after the staff utilized the theftproof screw to screw in to wait the fastener, after twisting the nut off, the accessible utilized magnet to adsorb the nut in order to clear up the nut of twisting off to make things convenient for the staff to retrieve the clearance.

Preferably, a mounting groove for inserting a screwdriver is formed in one end, away from the limiting block, of the nut.

Through adopting above-mentioned technical scheme, when staff installs the theftproof screw, with the screw rod aim at the screw hole position of waiting the fastener after, accessible screwdriver aims at the mounting groove position of nut with the rotatory screw of waiting the fastener in, the mounting groove has increased the area of atress of screwdriver and nut, has improved the installation effectiveness of theftproof screw.

Preferably, the cross section of the mounting groove perpendicular to the axis of the screw rod is in a regular hexagon shape.

Through adopting above-mentioned technical scheme, the shape of mounting groove is the regular hexagon shape of standard component, and the screwdriver that matches the use with the mounting groove is conventional type, application range is wider, therefore the staff need not to use purpose-made screwdriver when installing the theftproof screw, has improved the suitability of theftproof screw.

Preferably, the cross section of the nut perpendicular to the axis of the screw rod is in a regular polygon.

Through adopting above-mentioned technical scheme, the nut outward flange is the shape of mark interior hexagonal column cap, and when the volume of theftproof screw was great, the staff can install with the spanner when installing the theftproof screw, and the staff of being convenient for installs the theftproof screw.

Preferably, the side wall of the nut is provided with anti-skid patterns.

Through adopting above-mentioned technical scheme, the antiskid line has increased the area of force of staff and nut to the staff of being convenient for is when installing the theftproof screw, holds the nut in order to aim at the theftproof screw and place the screw position of waiting the fastener, plays anti-skidding effect.

Preferably, the tooth form of the screw is self-tapping

By adopting the technical scheme, the self-tapping screw is in the shape of the pointed end, can be used for wood materials, is convenient to drill holes in the pointed end shape, and can be screwed into a to-be-fastened piece.

Preferably, one side of the limiting block, which is close to the screw rod, is inclined inwards.

Through adopting above-mentioned technical scheme, stopper to the certain angle of middle slope, after the connection of nut and stopper is twisted off, the junction fracture of nut and stopper can produce the burr, and the stopper edge is protruding relatively to be favorable to reducing the user in the in-process of using the fastener, the circumstances of burr fish tail user of stopper improves user's use experience and feels, and the practicality is strong.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the method comprises the steps that in the process of locking an anti-theft screw on a to-be-fastened piece by a worker, after the screw rod is aligned to a screw hole of the to-be-fastened piece, the screw rod and a limiting block are screwed into the to-be-fastened piece by applying force after the screw cap is fixed by a screw driver, the limiting block is continuously applied with force to twist off the necking part of the screw cap by torque, and the anti-theft limiting block is left, and meanwhile, the anti-theft screw is locked; at the moment, the limiting block is sunk into a product to be fastened, the stress point is smaller, and the nut at the stress point is detached, so that the detachment difficulty of the anti-theft screw is greatly improved, namely the anti-theft effect of the anti-theft screw is improved; furthermore, the nut can use common hexagonal heads, round heads and the like, and a custom tool is not required to be used for installation during installation, so that the difficulty of mass production and use is reduced, and the applicability of the antitheft screw is improved;

2. after a worker screws the nut to be fastened by using the anti-theft screw, the worker can clean the screw cap which is screwed off by using the magnet to adsorb the screw cap, so that the worker can conveniently recover and clean the screw cap;

3. after the connection of nut and stopper is twisted, the junction fracture of nut and stopper can produce the burr, and the stopper edge is protruding relatively to be favorable to reducing the user in the in-process that uses the fastener, the burr fish tail user's of stopper condition improves user and uses experience and feel.

Drawings

Fig. 1 is a schematic view of the overall mounting structure of embodiment 1 of the present application.

Fig. 2 is a schematic view of an exploded structure of the nut of example 1 of the present application after the nut is broken.

Fig. 3 is a schematic view of the overall mounting structure in embodiment 2 of the present application.

Reference numerals illustrate:

1. a screw; 2. a limiting block; 3. a screw cap; 31. a mounting groove; 32. anti-skid lines.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-3.

Example 1

The embodiment of the application discloses an antitheft screw. Referring to fig. 1 and 2, the anti-theft screw comprises a screw 1, a limiting block 2 and a screw cap 3, wherein one side of the limiting block 2 is connected with the screw 1, and the other side of the limiting block 2 is connected with the screw cap 3; the screw 1 is provided with metric threads, the cross section area of the screw cap 3 gradually widens from one side close to the limiting block 2 to one side far away from the limiting block 2, the outer edge cross section of the screw cap 3 is circular, one end of the screw cap 3 far away from the limiting block 2 is provided with a mounting groove 31 for inserting a screw driver, and the cross section of the mounting groove 31 perpendicular to the axis of the screw 1 is in a regular hexagon shape, namely the screw cap 3 is a standard inner hexagon screw cap 3; the cross section of the limiting block 2 is circular, and the cross section area of the limiting block 2 is larger than the cross section area of one end, close to the limiting block 2, of the nut 3; after the screw rod 1 and the limiting block 2 are screwed into the fastener to be fastened by a worker through the screwdriver, the worker continues to apply force to twist off the joint of the nut 3 and the limiting block 2, and only the limiting block 2 embedded in the product is left, so that the anti-theft effect of the anti-theft screw is improved.

Referring to fig. 2, the nut 3 is made of ferromagnetic metal, so that a worker can recover the broken nut 3 by using a magnet.

The implementation principle of the antitheft screw provided by the embodiment of the application is as follows: when a worker locks an anti-theft screw on a product to be fastened, after aligning the screw rod 1 with the screw hole of the product to be fastened, then fixing the screw cap 3 by a screw driver, applying force to screw the screw rod 1 and the limiting block 2 into the product to be fastened, continuing applying force to twist the necking part of the screw cap 3 by torque, leaving the anti-theft limiting block 2, and simultaneously locking the anti-theft screw rod 1; at this time, the limiting block 2 is sunk into a product to be fastened, the stress point is small, and the nut 3 is detached, so that the detachment difficulty of the anti-theft screw is greatly improved, and the anti-theft effect of the anti-theft screw is improved.

Example 2

Referring to fig. 3, this embodiment is different from embodiment 1 in that: the tooth shape of the screw 1 is self-tapping, and the self-tapping is suitable for wood materials; one side of the limiting block 2, which is close to the screw 1, is inclined inwards, namely the outer edge of the limiting block 2 protrudes relative to the middle, so that the situation that burrs generated after the screw cap 3 is twisted off scratch a user is effectively reduced; the cross section of the nut 3 perpendicular to the axis of the screw 1 is regular polygon, in this embodiment, the cross section of the nut 3 is regular hexagon, the side wall circumference of the nut 3 is provided with anti-skid patterns 32, and the anti-skid patterns 32 are convenient for staff to hold the anti-theft screw for installation.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. An antitheft screw, comprising: screw rod (1), stopper (2) and nut (3), one side of stopper (2) with screw rod (1) is connected, the opposite side of stopper (2) connect in nut (3), the cross sectional area of nut (3) is gradually wide trend from being close to one side of stopper (2) towards keeping away from one side of stopper (2), the cross sectional area of stopper (2) is greater than the cross sectional area of nut (3) is close to one end of stopper (2).

2. An antitheft screw according to claim 1, characterized in that the nut (3) is ferromagnetic metal.

3. An antitheft screw according to claim 1, characterized in that the end of the nut (3) remote from the limit block (2) is provided with a mounting groove (31) for the insertion of a screwdriver.

4. A theft-proof screw according to claim 3, characterized in that the mounting groove (31) has a regular hexagonal cross-section perpendicular to the axis of the screw (1).

5. An antitheft screw according to claim 1, characterized in that the cross section of the nut (3) perpendicular to the axis of the screw (1) is of regular polygon shape.

6. An antitheft screw according to claim 1, characterized in that the side wall of the nut (3) is provided with anti-slip threads (32).

7. An antitheft screw according to claim 1, characterized in that the profile of the screw (1) is a self-tapping profile.

8. An antitheft screw according to claim 1, characterized in that the side of the stopper (2) close to the screw (1) is inclined inwards.