an idle lock

Abstract

An idling lock comprises a lock cylinder, an engineering vane, a common vane, an engineering key and an owner key. The lock cylinder is provided with a spring, a spring head can extend into a vane groove and abut against the end face of the engineering vane, the engineering vane is provided with a W-shaped notch, and engineering key teeth are not contacted with the engineering vane, but owner key teeth are contacted with the engineering vane. After the owner key is inserted, the engineering vane moves, the spring head is separated from a lower frame edge of the engineering vane and is buckled on the side face of a protruding block along the protruding block, and the engineering vane can not recede so that after the owner key opens the lock, the engineering key can not be used for unlocking. By means of the design of the idling structure, the situation that the engineering key is changed into the owner key for use is effectively prevented. Besides, due to special-shaped design of the engineering vane and the engineering spring and special arrangement of a special-shaped strip and a limiting strip, any kind of technical unlocking can be prevented. Besides, an anti-drill bolt, an anti-drill card and an embedded block are arranged in each lock, so any violent unlocking can be prevented.

Description

technical field [0001] The invention relates to a mechanical lock, in particular to an idle lock. Background technique [0002] The current door locks are generally equipped with engineering keys and master keys. This is to adapt to the need to give engineering keys to the decoration workers when the new house is decorated. Change the locks. And the engineering key of existing mechanical idle lock is the same as that of the owner's key, and the difference is that a transverse hole is arranged on the engineering key sheet but not on the owner's key. But in this way, it is easy to change the engineering key into the master key: as long as the transverse hole on the engineering key blade is filled with chewing gum, fuse or plastic bag melting, etc., it can be used as the master key, which will cause great hidden dangers. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a idling lock that cannot change the engineeri...

AI Technical Summary

Problems solved by technology

And the engineering key of the existing mechanical idle lock is the same as that of the owner's key, the difference is that there is a transverse hole on the engineering key sheet and there is no on the owner's key.

But in this way, it is easy to change the engineering key into the master key: as long as the transverse hole on the engineering key blade is filled with chewing gum, fuse or plastic bag melting, etc., it can be used as the master key, which will cause great hidden dangers.

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