CN2320744Y

CN2320744Y - Anti-picking safety door lock

Info

Publication number: CN2320744Y
Application number: CN 98232603
Authority: CN
Inventors: 姜国荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-25
Filing date: 1998-03-25
Publication date: 1999-05-26
Anticipated expiration: 2008-03-25

Abstract

The utility model relates to an anti-prying safety door lock which comprises a lock body 1 with a lock bolt, and a lock latch box 2. The utility model is characterized in that the front end of the lock bolt 3 is triangular, a tooth-shaped groove is arranged on the bevel of the triangular lock bolt, and the crash part of the lock latch box 2 and the lock bolt 3 is an arc surface which is tangential to the moving direction of the lock bolt. The utility model has the characteristics of simple structure, convenient manufacture and installation, and strong anti-prying and anti-kicking effects.

Description

The tamper-resistant safety door lock

The utility model relates to a kind of door lock, especially for the safety door latch of pick-proof purpose.

The present common door lock that uses, since its triangle dead bolt intrinsic inclined-plane, make the door lock with this structure be easy to be pushed aside by the card of hard or plastic sheet, so the der Hammer feelings happen occasionally in life, make people suffer original avoidable loss.The disclosed a kind of pick-proof door lock of Chinese patent literature (application number: 94221023) be the way that addresses this problem, it comprises snap close and lock body two parts, snap close is fixed on the doorframe, lock body is fixed on the body, lock body is made of lock housing, tapered end, dead bolt, it is characterized in that: the end at dead bolt is provided with lock hook, and snap close is provided with the chimb that catches on for lock hook.Though the door lock of said structure can be realized its purpose, seem a bit reluctantly, so its market prospects are difficult to have an optimistic view of.Have again, the various safe-guard door locks of seeing on the market now, though its pick-proof, antitheft function strengthens to some extent because complex structure, so although gone on the market for many years, never have, also can't replace former common door lock.

The purpose of this utility model provides a kind of tamper-resistant safety door lock, and it only needs that existing common door lock is done one and simply transforms, and the situation that can stop dead bolt easily to be pushed aside takes place.

The purpose of this utility model is to realize like this, it comprises lock body 1 and the keeper 2 that has dead bolt, its architectural feature is, the front end of described dead bolt 3 is triangular shaped, on above-mentioned inclined-plane with triangular shaped dead bolt, offer dentation groove 4, on the described keeper 2, with collision place of dead bolt 3, be one with the tangent cambered surface 5 of dead bolt moving direction.

Good effect of the present utility model is as follows, and this tamper-resistant safety door lock only needs that existing common spring door lock is done one and simply transforms, and the situation that can stop dead bolt easily to be opened thoroughly takes place.It has simple in structure, and it is convenient to make and install, and pick-proof and the anti-function of kicking are strong, the flexible characteristics such as flexible of dead bolt.

The utility model is described in further detail below in conjunction with accompanying drawing,

Fig. 1 is a structural representation of the present utility model,

Fig. 2 is the utility model keeper and the shape schematic diagram that is provided with cambered surface 5 thereof,

Fig. 3 is the schematic diagram that has the triangle dead bolt of cambered surface in the utility model.

As shown in Figure 1 and Figure 2, the utility model comprises lock body 1 and the keeper 2 that has dead bolt, the front end of described dead bolt 3 is triangular shaped, its primary structure is characterised in that, offer several dentation grooves 4 on the inclined-plane of this triangle dead bolt 3, on the described keeper 2, with collision place of dead bolt 3, be a cambered surface 5 tangent with the dead bolt moving direction.

The main effect of above-mentioned characteristic is, this dentation groove can be exempted effectively to be had human to dial card door is opened thoroughly, and when going into the dead bolt place because of dialling inlay card, the groove of promptly being located on the dead bolt blocks, and it can't be exerted oneself.And the purpose of being located at the cambered surface 5 on the keeper is to prevent that the groove on the dead bolt is stuck on the outer of keeper, and in order to achieve this end smoothly, the arc length of above-mentioned cambered surface 5 should be greater than the width of every dentation groove.

In order to make the utility model can satisfy the different needs of people, the inclined-plane of the described triangle dead bolt of this tamper-resistant safety door lock can be one to have the cambered surface (as shown in Figure 3) of dentation groove.

Claims

1, a kind of tamper-resistant safety door lock, it comprises lock body (1) and the keeper (2) that has dead bolt, the front end of described dead bolt (3) is triangular shaped, it is characterized in that, on above-mentioned inclined-plane with triangular shaped dead bolt, offer dentation groove (4), on the described keeper (2), with collision place of dead bolt (3), be one with the tangent cambered surface (5) of dead bolt moving direction.

2, according to the tamper-resistant safety door lock described in the claim 1, its feature can be one to have the cambered surface of dentation groove with, the inclined-plane of described triangle dead bolt.