CN201401406Y

CN201401406Y - Burglar-proof screw and special screwdriver thereof

Info

Publication number: CN201401406Y
Application number: CN200920311039XU
Authority: CN
Inventors: 高世超
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-22
Filing date: 2009-09-22
Publication date: 2010-02-10
Anticipated expiration: 2019-09-22

Abstract

The utility model discloses a burglar-proof screw which comprises a screw head and a threaded screw stem with same. The screw head is provided with a circular slot which is internally provided with abulge and the side face of the bulge is provided with at least two angular corners. The utility model also discloses a special screwdriver of the burglar-proof screw, which comprises a handle and a driving rod. The front end of the driving rod is provided with a slot; the shape of the slot is matched with the shape of the bulge at the screw head; and the outer diameter of the driving rod equals tothe diameter of the circular slot at the screw head. The screw head of the burglar-proof screw has no straight slot or cross slot of normal screws and the screw head takes a circular shape, so that common-used straight screwdrivers, cross screwdrivers, tons or wrenches cannot unscrew due to no origin force, thereby effectively preventing the screw from being disassembled or unscrewed by other persons without consent and bringing the burglar-proof function into play. In addition, in order to unscrew the burglar-proof screw conveniently, the burglar-proof screw is also matched with the specialscrewdriver.

Description

A kind of anti-theft screw and special rotating tool thereof

Technical field

The utility model relates to a kind of fastening piece and opens the special tool of this fastening piece, particularly a kind of screw and special rotating tool that can be effectively antitheft.

Background technique

Screw loses in our life nowhere as a kind of common secure component.Conventional screw head is provided with straight groove or cross recess usually, can carry out fastening or spin-up by straight screwdriver or Phillips screwdriver commonly used, in addition, if groove is not set on the screw head, usually screw head then can be designed to the polygonal of rule, as regular hexagon etc., be convenient to carry out fastening or spin-up with instruments such as pliers.

But in some specific occasions, screw plays a part then to prevent that other people from opening or dismantling with this screw fastening article or device, and at this moment, our normally used screw then can not reach the effect that we need.

The model utility content

Goal of the invention of the present utility model is: at the problem of above-mentioned existence, provides a kind of and can prevent other people the careless anti-theft screw of opening, and the tool that revolves of opening this anti-theft screw special use.

The technical solution of the utility model is achieved in that a kind of anti-theft screw, comprise screw head and threaded screw rod, it is characterized in that: screw head is provided with circular groove, is provided with projection in circular groove, and the side of described projection has two corner angle at least.

In order to prevent that other people from using spin-up screws such as pliers, spanner, anti-theft screw described in the utility model, its described screw head is cylindrical.

A kind of special rotating tool that is used for described anti-theft screw, comprise handle and swing arm, its front end at swing arm is provided with groove, and the shape of the projection that is provided with on the shape of described groove and the screw head is complementary, the equal diameters of circular groove on the outer diameter of described swing arm and the screw head.

The screw head of anti-theft screw of the present utility model does not have the straight groove or the cross recess of conventional screw, and screw head integral body is rounded, general straight screwdriver, Phillips screwdriver, pliers or spanner etc. will go spin-up, and it does not all have Point of Strength, can't be with its spin-up, like this, effectively prevented the phenomenon that other people arbitrarily dismantle or open without approval, played antitheft effect, can be used for the specific occasion of having relatively high expectations antitheft; Simultaneously, open this anti-theft screw for convenience, the utility model also is furnished with the special-purpose tool that revolves.

Description of drawings

Fig. 1 is the sectional view of the utility model anti-theft screw.

Fig. 2 is the plan view of the utility model anti-theft screw.

Fig. 3 is the sectional view of the utility model anti-theft screw special rotating tool.

Mark among the figure: 1 is screw head, and 2 is screw rod, and 3 is circular groove, and 4 is projection, and 5 is handle, and 6 is swing arm, and 7 is groove.

Embodiment

Below in conjunction with accompanying drawing, the utility model is done detailed explanation.

In order to make the purpose of this utility model, technological scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As illustrated in fig. 1 and 2, a kind of anti-theft screw comprises screw head 1 and threaded screw rod 2, and described screw head 1 integral body is cylindrical, and screw head 1 is provided with circular groove 3, is provided with projection 4 in circular groove 3, and there are three corner angle described protruding 4 side.

As shown in Figure 3, a kind of special rotating tool that is used for described anti-theft screw, comprise handle 5 and swing arm 6, the equal diameters of circular groove 3 on the outer diameter of described swing arm 6 and the screw head 1, its front end at swing arm 6 be provided with screw head 1 on the groove 7 that is complementary of projection 4 shapes that are provided with.

When needing the rotation anti-theft screw, to revolve in the circular groove of tool insertion screw, simultaneously convex to form matching status completely in the groove of swing arm front end setting and the screw head circular groove, stressed mutually by groove and protruding corresponding corner angle, thus revolve the fastening or spin-up that tool drives anti-theft screw.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. an anti-theft screw comprises screw head (1) and threaded screw rod (2), and it is characterized in that: screw head (1) is provided with circular groove (3), is provided with projection (4) in circular groove (3), and the side of described projection (4) has two corner angle at least.

2. anti-theft screw according to claim 1 is characterized in that: described screw head (1) is cylindrical.

3. special rotating tool that is used for the described anti-theft screw of claim 1, comprise handle (5) and swing arm (6), it is characterized in that: the front end at swing arm (6) is provided with groove (7), the shape that the shape of described groove (7) and screw head (1) are gone up the projection (4) that is provided with is complementary, and the outer diameter of described swing arm (6) and screw head (1) are gone up the equal diameters of circular groove (3).