CN2169669Y

CN2169669Y - Anti-universal key opening lock

Info

Publication number: CN2169669Y
Application number: CN 93229390
Authority: CN
Inventors: 赵世凯; 赵世伟; 吴洪洁; 赵世辉; 白俊峰; 陈威
Original assignee: 赵世凯
Priority date: 1993-10-05
Filing date: 1993-10-05
Publication date: 1994-06-22
Anticipated expiration: 2003-10-05

Abstract

The utility model relates to a lock which prevents from opening by a universal key, belonging to the technical field of the theft protection. The utility model is composed of a lock body, a lock core, a lock spring column and a lock spring. The lower end of the lock spring column is provided with a thin-head lock spring column, and a corresponding lock spring hole on the lock core is provided with an anti-theft groove according to the opposite rotary direction of the lock core when the lock is opened. The utility model has the advantage of simple structure.

Description

Anti-universal key opening lock

The utility model belongs to technical field of burglary prevention, is specifically related to a kind of lock that prevents with unlocked by universal key.

Lock is a requisite safe antitheft equipment in people's daily life and the work, and the producer that produces lock works hard from the soundness of lock, and the internal construction of lock does not have to change substantially.They all have a rotatable lock core under the control of this lock key, and locking tappet hole and the locking tappet hole on the lock body on the lock core are one to one, and two joint snap post and bar springs are all arranged in each corresponding locking tappet hole.After this lock key inserted keyhole, the joint of two in each locking tappet hole snap post first segment was stayed in the lock core, and second joint retreats in the lock body, and its intersection is point-blank just, and with the same level of lock core cylinder, so lock core can rotate, lock promptly is opened.

If manufacturing a kind of special flat clavis spoon (being exactly the said master keys of people) all shifts onto two joint snap posts in the lock body, and the locking tappet hole on the lock core comes filling by the tooth of special key, then lock also can be opened, this the situation that a key is opened thousand locks will occur, and social security will be affected.

The purpose of this utility model is exactly on the basis of existing lock its structure to be improved, and further improves the performance of lock.

The utility model is made up of lock body, snap, snap post and lock core.The lower end car of snap post has thin snap post.Locking tappet hole and key are arranged also on the lock core.The opposite direction of the lock core rotation when unblanking of the locking tappet hole place on the lock core is milled with antitheft groove.

Describe the technical solution of the utility model in detail below in conjunction with accompanying drawing.

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

Lock core view when Fig. 2 is the locking tappet hole level;

Fig. 3 is that Fig. 2 cuts profile along AA ' line.

1 is snap among the figure, and 2 is common snap post, and 3 is keyhole, and 4 is the locking tappet hole on the lock body, and 5 is lock body, and 6 is lock core, and 7 is antitheft groove, and 8 is the locking tappet hole on the lock core, and 9 is thin snap post.

At first the aperture of any one locking tappet hole 8 on the lock core 6 is located, about dark 1mm of being of the opposite direction upper edge lock core arc column facing cut of lock core 6 rotations when unblanking (according to the size of locking), wide is lockhole locking tappet hole 8 diameters about 2/3 (will make common snap post insert not enter), the long antitheft groove 7 that equals the locking tappet hole diameter.Thin with the lower end of corresponding snap post (about 1mm is long) car is thin snap post 9 then, makes the antitheft groove 7 of insertion that its thinner part can be freely.

During the dress snap, have the locking tappet hole 8 of antitheft groove 7 will adorn thin snap post 9 on the lock core 6, it is consistent with thin snap post butt end that remainder is adorned common snap post 2(diameter).When unblanking with this lock key, thin snap post 9 stayed in the lock core 6 and rotated with lock core 6, and the snap post 2 in the lock body 5 is inserted in the antitheft groove 7 of not entering, and makes the rotation of lock core 6 unaffected.

When unblanking with MASTERKRY, because it is that two joint snap posts are all pushed back in the lock body 5, locking tappet hole 8 on the lock core 6 is is all filled and led up by the tooth of MASTERKRY, thin spring post 9 pressing closer the tooth of MASTERKRY, when lock core 6 turns to certain angle, the front end of the snap post MASTERKRY tooth that staggers, thin snap post 9 bullet under the effect of snap 1 advances in the antitheft groove 7, make lock core 6 can't continue to rotate, thereby reach the purpose that prevents to open lock with MASTERKRY to the direction of unblanking.

The utility model is simple in structure, has great practical value.

Claims

1, a kind of lock that prevents with unlocked by universal key, form by lock body 5, lock core 6, snap 1, snap post 2, it is characterized in that the lower end car of 1-2 snap post is had thin snap post 9, the opposite direction of corresponding locking tappet hole 8 places lock core 6 rotations when unblanking is milled with antitheft groove on the lock core 6.