CN2321883Y

CN2321883Y - Cylinder lock head capable of preventing opened by universal key

Info

Publication number: CN2321883Y
Application number: CN 98230097
Authority: CN
Inventors: 沈其衡
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-22
Filing date: 1998-01-22
Publication date: 1999-06-02
Anticipated expiration: 2008-01-22

Abstract

The utility model relates to a cylinder lock capable of preventing opened by a universal key, which is mainly composed of a key (1), an outer cover (2), a spring (3), a marble (4), a core shaft (6), an inner cover (7) and a cylindrical pin (8), wherein the top of the key is drilled with an axial small hole or a notch, and the core shaft or a core strip is arranged at the corresponding end of the inner cover. When the key is inserted into the inner cover, the core shaft or the core strip can be penetrated into the small hole or the notch, and the lock can be unlocked normally. Since the top end of the universal key can not be provided with the identical small hole or notch, the universal key is blocked by the core shaft and can not be inserted into the bottom, and the purpose of preventing opened by the universal key is achieved. The utility model has the characteristics of reasonable structure and easy popularization, and is suitable for various locks with various purposes.

Description

But the ball lock head that preventing universal key is opened

But the utility model relates to the ball lock head that a kind of preventing universal key is opened, and is applicable to various types of locksets.

The ball lock head of existing various locksets has advantage of simple structure, and the function of anti-dial, anti-cover being opened is better, but ubiquitous weak point is a preventing universal key not, as the master key of rolling with the hairspring steel wire; Master key with stalloy or silica gel making; And the instruments of making of two finer wires such as hook, the master key of the above-mentioned type and instrument can be opened tapered ends such as cross, two-sided shape, cylindrical recess shape, dull and stereotyped hole shape, common single face shape in the short period of time, so the problem of ball lock head theftproof performance difference has to be solved.

But the purpose of this utility model is to overcome above-mentioned weak point and the ball lock head of custom-designed a kind of preventing universal key unlatching.

Technical characterictic of the present utility model is achieved by the following scheme: bore an axial aperture or cut an axial gap on key tops such as cross, two-sided shape, common single face shape, cylindrical recess shape, dull and stereotyped hole shapes, in the corresponding end of interior cover one mandrel or core bar are installed, the aperture on key top or the degree of depth of breach equal the distance in this end of key and first row's pellet shot from a slingshot or second row's pellet shot from a slingshot hole.The extension elongation of mandrel or core bar cooperates with its degree of depth, both can insert unlatching smoothly with original-pack key, and the top of master key can't make aperture or breach, when inserting this tapered end with master key, block because of there are mandrel or core bar in the inside, just can't be inserted at the end, it is fiddled with less than innermost one to two row's pellet shot from a slingshot, then can't all pellet shot from a slingshot tops are concordant, this lock just reaches the purpose that preventing universal key is opened.

In sum, the utility model be a kind of have rational in infrastructure, be easy to promote, but the ball lock head that preventing universal key is opened is applicable to the lockset of all kinds various uses.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Accompanying drawing is a sectional view of the present utility model

See figure, the utility model is made of key [1], overcoat [2], spring [3], pellet shot from a slingshot [4], mandrel [6], interior cover [7], straight pin [8].Key [1] top is drilled with an axial aperture [5] or saw has an axial gap, interior cover [7] inner end is installed the core bar of a mandrel [6] or square-section securely, fastening between interior cover [7] and the mandrel [6] with straight pin [8], the degree of depth of the aperture [5] on key [1] top equals the distance in this end of key and second row's pellet shot from a slingshot [4] hole, and mandrel [6] microcephaly's length equals the degree of depth of key [1] aperture [5].When in key [1] inserts, overlapping [7], mandrel [6] or core bar penetrate the aperture [5] or the breach on key [1] top, so this reality is made novel original-pack key [1] and can be inserted interior cover [7] smoothly and will lock unlatching, then can't be inserted at the end because of making identical aperture or breach with various master keys, but therefore preventing universal key is opened.

Claims

But the ball lock head that a kind of preventing universal key is opened, mainly constituted by key [1], overcoat [2], spring [3], pellet shot from a slingshot [4], mandrel [6], interior cover [7], straight pin [8], it is characterized in that key [1] top is drilled with an axial aperture [5] or cuts an axial gap, the core bar that interior cover [7] inner end is installed a mandrel [6] or square-section securely penetrates the aperture [5] or the breach on key [1] top.