CN203113936U - Anti-theft lock - Google Patents

Abstract

An anti-theft lock comprises a lock body. A lock cylinder is rotatably mounted in the lock body, a plurality of spring piece sliding rails are formed in the lock body and the lock cylinder, first spring pieces and second spring pieces are arranged in the spring piece sliding rails, end caps are arranged at one ends, far away from the lock cylinder, of the spring piece sliding rails, a check lever is arranged at one ends of the end caps or one ends of the second spring pieces, and the check lever is provided with a spring. The anti-theft lock can prevent the first spring pieces and the second spring pieces from entirely entering the portions, located in the lock body, of the spring piece sliding rails, therefore the lock cylinder is hard to rotate without a matched key, and the anti-theft performance of the anti-theft lock is improved. And a drill resistant steel sheet is arranged to enlarge the difficulty of breaking the spring pieces through a drilling mode.

Description

A kind of theftproof lock

Technical field

The utility model relates to a kind of lock field, particularly a kind of theftproof lock.

Background technology

In existing lock core and the lock body structure, be typically provided with the pellet shot from a slingshot corresponding with convex-concave fluctuating on the key, usually pellet shot from a slingshot is two, when on the key convex-concave rises and falls the upper surface that just in time makes first pellet shot from a slingshot when concordant with the outer rim of lock core, lock core just can rotate, otherwise pellet shot from a slingshot will pin between lock core and the lock body.The problem that exists is, by special gimmick, can make two pellets shot from a slingshot all enter into the part that the pellet shot from a slingshot slideway is positioned at lock body, namely in the lock body slideway distance A among Fig. 1 and 3, gets final product rotary locking cylinder thereby need not key.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of theftproof lock, can avoid two pellets shot from a slingshot all to enter into the part that the pellet shot from a slingshot slideway is positioned at lock body, thereby not have correct key to be difficult to rotary locking cylinder.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of theftproof lock, comprise lock body, lock core is rotating to be installed in the lock body, be provided with many pellet shot from a slingshot slideways in lock body and the lock core, in the pellet shot from a slingshot slideway, be provided with first pellet shot from a slingshot and second pellet shot from a slingshot, be provided with plug at the pellet shot from a slingshot slideway away from an end of lock core, end at plug or second pellet shot from a slingshot is provided with lever, and lever is provided with spring.

The length of described lever, first pellet shot from a slingshot and second pellet shot from a slingshot is:

B＞C＋D＋E＞A；

Wherein:

Lock body slideway distance: A;

Pellet shot from a slingshot slideway distance: B;

Lever length: C;

Second pellet shot from a slingshot length: the D;

First pellet shot from a slingshot length: the E.

Described lock core front end also is provided with anti-drilling steel disc.

Between lock core front end and anti-drilling steel disc, also be provided with rotatable lock core catch, have the hole of inserting for key on the lock core catch.

A kind of theftproof lock that the utility model provides can avoid first pellet shot from a slingshot and second pellet shot from a slingshot all to enter into the part that the pellet shot from a slingshot slideway is positioned at lock body, thereby does not use correct key to be difficult to make the lock core rotation, has improved the theftproof performance of theftproof lock.The anti-drilling steel disc that arranges makes and destroys pellet shot from a slingshot by the mode of boring and increased difficulty.

Description of drawings

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

Fig. 1 is the structural representation of enforcement 1 of the present utility model.

Fig. 2 is the G-G cross-sectional schematic of Fig. 1.

Fig. 3 is the structural representation of enforcement 2 of the present utility model.

Fig. 4 is the F-F cross-sectional schematic of Fig. 3.

Among the figure: lock body 1, lock core 2, plug 3, the first pellets shot from a slingshot 4, the second pellets shot from a slingshot 5, anti-drilling steel disc 6, pellet shot from a slingshot slideway 7, lock core catch 8, lever 9, spring 10.

The specific embodiment

Embodiment 1:

In Fig. 1,2, a kind of theftproof lock, comprise lock body 1, lock core 2 rotating being installed in the lock body 1, be provided with many pellet shot from a slingshot slideways 7 in lock body 1 and the lock core 2, in pellet shot from a slingshot slideway 7, be provided with first pellet shot from a slingshot 4 and second pellet shot from a slingshot 5, be provided with plug 3 at pellet shot from a slingshot slideway 7 away from an end of lock core 2, an end that is positioned at pellet shot from a slingshot slideway 7 at plug 3 is provided with lever 9, and lever 9 is provided with spring 10.The lever 9 that arranges has avoided first pellet shot from a slingshot 4 and second pellet shot from a slingshot 5 all to enter in the pellet shot from a slingshot slideway 7, thereby does not use correct key then can not make lock core 2 rotations, thereby has improved theftproof performance.

The length of described lever 9, first pellet shot from a slingshot 4 and second pellet shot from a slingshot 5 is:

B＞C+D+E＞A; Wherein:

Lock body slideway distance: A;

Pellet shot from a slingshot slideway distance: B;

Lever length: C;

Second pellet shot from a slingshot length: the D;

First pellet shot from a slingshot length: the E.

When the length of lever 9, first pellet shot from a slingshot 4 and second pellet shot from a slingshot 5 meets this formula, then first pellet shot from a slingshot 4 and second pellet shot from a slingshot 5 just can not all enter in the pellet shot from a slingshot slideway 7.Therefore with push rod jack-up first pellet shot from a slingshot 4, stir the modes that first pellet shot from a slingshot 4 and second pellet shot from a slingshot 5 are all sprung in the pellet shot from a slingshot slideway 7 fast and can't make the lock core rotation again.

Described lock core 2 front ends also are provided with anti-drilling steel disc 6.Structure thus, destroying pellet shot from a slingshot by the mode of boring will increase difficulty.Front end in this example refers to the below among Fig. 1 and Fig. 3.

Between lock core 2 front ends and anti-drilling steel disc 6, also be provided with rotatable lock core catch 8, have the hole of inserting for key on the lock core catch 8.Structure has further been protected lock core thus, adopts improper method will be difficult to make the lock core rotation.

Embodiment 2:

In Fig. 3,4, a kind of theftproof lock, comprise lock body 1, lock core 2 rotating being installed in the lock body 1, be provided with many pellet shot from a slingshot slideways 7 in lock body 1 and the lock core 2, in pellet shot from a slingshot slideway 7, be provided with first pellet shot from a slingshot 4 and second pellet shot from a slingshot 5, be provided with plug 3 at pellet shot from a slingshot slideway 7 away from an end of lock core 2, end at second pellet shot from a slingshot, 5 close pellet shot from a slingshot slideways 7 is provided with lever 9, and lever 9 is provided with spring 10.

The difference of this example and embodiment 1 just is that lever 9 is arranged on second pellet shot from a slingshot 5, and all the other are identical with structure among the embodiment 1.Structure is convenient to the transformation of existing lockset thus.Namely only need change second pellet shot from a slingshot 5, can improve the theftproof performance of existing lockset.

Claims (4)

1. theftproof lock, comprise lock body (1), lock core (2) is rotating to be installed in the lock body (1), be provided with many pellet shot from a slingshot slideways (7) in lock body (1) and the lock core (2), in pellet shot from a slingshot slideway (7), be provided with first pellet shot from a slingshot (4) and second pellet shot from a slingshot (5), be provided with plug (3) at pellet shot from a slingshot slideway (7) away from an end of lock core (2), it is characterized in that:

End at plug (3) or second pellet shot from a slingshot (5) is provided with lever (9), and lever (9) is provided with spring (10).

2. a kind of theftproof lock according to claim 1, it is characterized in that: the length of described lever (9), first pellet shot from a slingshot (4) and second pellet shot from a slingshot (5) is:

B＞C＋D＋E＞A；

Wherein:

Lock body slideway distance: A;

Pellet shot from a slingshot slideway distance: B;

Lever length: C;

Second pellet shot from a slingshot length: the D;

First pellet shot from a slingshot length: the E.

3. a kind of theftproof lock according to claim 1 and 2, it is characterized in that: described lock core (2) front end also is provided with anti-drilling steel disc (6).

4. a kind of theftproof lock according to claim 3 is characterized in that: also be provided with rotatable lock core catch (8) between lock core (2) front end and anti-drilling steel disc (6), have the hole of inserting for key on the lock core catch (8).

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