Linkage type unlocking theft-proof lock

Abstract

The invention provides a linkage type unlocking theft-proof lock. The toothed grooves of clips are formed on front-location clips and last-location clips; front-location brake teeth and last-location brake teeth fitted with the toothed grooves of the chips are formed on a brake lever; and a brake end fitted with a brake groove is arranged in the last location of the brake lever. When the linkage type unsealing theft-proof lock is unlocked, all the front-location clips can be opened if the pushing inclined plane of a key contacts with the contact surface of the last-location clips; the last-location clips can be opened if the pushing inclined plane of the key is pressed against the contact surface of the last-location clips; and then, the inclined plane of the toothed grooves of the last-location clip can be fitted with the inclined plane of the last-location brake teeth so as to drive the brake end of the brake lever to be separated from the brake groove, thus achieving the secondary unlocking. When the linkage type unlocking theft-proof lock is locked, the key is pulled out to close the last-location clips at first; and the front-location clips are driven by the back-pressure inclined plane of the key to shift and further be propped against the brake lever through the inclined plane of the toothed grooves of the clips, thus the brake end can be fitted with the brake groove, thereby achieving the secondary locking. By achieving the secondary locking and unlocking in a linkage manner, the invention can effectively improve the theft-proof effect of the lock.

Description

technical field [0001] The invention relates to an anti-theft lock head, in particular to a linkage unsealed anti-theft lock head. Background technique [0002] A shrapnel type anti-theft lock (patent application number: 200710160958.7, publication number: CN101196085). Its opening and sealing method is: during the key insertion process, through the insertion of the key, all the shrapnel in the lock head are out of the locked state and enter the rotation interface of the lock cylinder, but at this time the lock cylinder is not detached due to the shrapnel. In the locked state, it can be rotated. The key must be used to drive the rotation of the circular control piece, so that the circular control piece pushes the boss at the end of the guide rod to make an axial displacement backward, breaks away from the groove on the lock sleeve, and passes through the groove on the guide rod. Only when the brake tooth of the guide rod cooperates with the tooth groove of the shrapnel can ...

AI Technical Summary

Problems solved by technology

[0005] 2. Since the shrapnel and the guide rod are locked separately, the engagement of the two is realized through the circular control piece, but in essence, the two perform their own locking functions, and there is only a passive braking relationship between the two, not through linkage. braking relationship

[0007] 4. The complex structure will inevitably increase the cost of molds and the difficulty of process processing, and there are also many remaining functions in terms of value engineering analysis

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