CN2150380Y

CN2150380Y - Anti-theft fastener

Info

Publication number: CN2150380Y
Application number: CN 92226469
Authority: CN
Inventors: 梁刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-07-06
Filing date: 1992-07-06
Publication date: 1993-12-22
Anticipated expiration: 2002-07-06

Abstract

The utility model relates to an anti-theft fastener, belonging to the fastening coupling field, which comprises fasteners, an anti-theft cover 2, and the elastic members 3. The screwing part 1 of the fastener is provided with a support part 5 for placing the elastic component 3, and the anti-theft cover 2 whose an inner surface is in the shape of a revolving curved surface is covered on the screwing part 1. The inner surface phase of the anti-theft cover corresponding to the position of the support part 5 is provided with a ring groove 4 which matches with the elastic component 3. The anti-theft cover and the fasteners covered inside the anti-theft cover implement the rotational connection via the elastic component for playing an anti-theft purpose. The utility model has the advantages of easy operation, no dismantlement, and reliable anti-theft function, and the utility model is suitable to the theft protection of important facilities.

Description

Anti-theft fastener

The utility model relates to fastening piece, belongs to fastening coupling field.

Chinese patent CN2045440U " antitheft fastener " is made of nut, bolt, fastening pad and removable insole pieces, and it can be dismantled by special tool, therefore can give the unprincipled fellow with chance.

The purpose of this utility model provides a kind of fastener non-dismountable, easy for installation, is used for the antitheft of critical facility.

The purpose of this utility model is achieved in that a kind of antitheft fastener has fastening piece, it also comprises pilferproof closure and resilient member, tightening of fastening piece has the support of laying resilient member in the portion, internal surface is that the pilferproof closure of surface of revolution covers in the portion of tightening, and has the annular groove that matches with resilient member at the internal surface of pilferproof closure corresponding to the position of support.

Behind to be tightened fastening the finishing, tighten at it resilient member is installed in the portion, outer cover pilferproof closure and resilient member is snapped in the annular groove of pilferproof closure subsequently makes pilferproof closure and the fastening piece portion of tightening that covers on wherein realizes being rotationally connected by resilient member, thereby reaches antitheft purpose.

The utility model compact structure, required part all adopt common process processing, can't touch the parts that pilferproof closure covers from the outside, therefore have easy, non-dismountable, the antitheft reliable advantage of realization.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is first embodiment of the present utility model;

Fig. 2 is second embodiment of the present utility model.

Antitheft fastener shown in Figure 1 is by screw and cover on it and tighten that pilferproof closure 2 in the portion 1 forms.The resilient member support 5 that the radial hole form is arranged in the portion that tightens 1 of screw, lay the resilient member of forming by spring and pin 3 in the hole, the internal surface of pilferproof closure 2 is a surface of revolution, and the surface has the circular groove 4 that matches with pin corresponding to the radial hole position within it.Screw is screwed, mounting spring and pin in its support 5, outer cover pilferproof closure and pin is stretched in the annular groove 4 has so just been realized being rotationally connected of pilferproof closure and screw subsequently.Because the screw that can't touch in the cover from the outside tightens portion, so reached the non-removable anti-theft purpose.

Fig. 2 represents the portion that tightens 1 of fastening piece and the another kind of Placement of pilferproof closure 2, and it lays elastic collar 3 therein at the resilient member support 5 that tightens portion's open loop flute profile formula.When pilferproof closure covers when tightening portion, this collar snaps under elastic reaction in the annular groove 4 of pilferproof closure, realizes both being rotationally connected thus.

Fastening piece also can be made up of screw bolt and nut except that screw, and for back kind situation, its bolt and nut also can aforesaid mode be connected with pilferproof closure.

Claims

1, a kind of antitheft fastener has fastening piece, it is characterized in that it also comprises pilferproof closure (2) and resilient member (3), the support (5) of laying resilient member (3) is arranged in the portion that tightens (1) of fastening piece, internal surface is that the pilferproof closure (2) of surface of revolution covers in the portion of tightening (1), has the annular groove (4) that matches with resilient member (3) at the internal surface of pilferproof closure corresponding to the position of support (5).

2, antitheft fastener according to claim 1 is characterized in that said resilient member (3) is made of spring and pin, and said support (5) is a radial hole.

3, antitheft fastener according to claim 1 is characterized in that said resilient member (3) is an elastic collar, and said support (5) is an annular groove.