Anti-theft door lock with secondary lock

Abstract

The invention provides an anti-theft door lock with a secondary lock. The anti-theft door lock comprises a lock body, a middle power mechanism, a main lock plunger and a sliding plunger, and is characterized in that the secondary lock which is connected in an integral manner is arranged in the lock body; the secondary lock comprises a hollow lock shell and a hook-shaped hook tongue arranged in the lock shell; the lock shell is fixed in the lock body; the sliding plunger moves in the lock shell by pulling the hook tongue through a pulling sheet and a transmission mechanism; the hook tongue slides in the lock shell through the driving of the sliding plunger; and the hook tongue extends out of the outer side of the lock body to rotate. When the hook tongue moves in the lock shell, the hook tongue does not only rotate, but also does combined movement of sliding and rotating. Therefore, no too much space for moving the hook tongue is needed to reserve in the lock body of the anti-theft door lock; and the space use ratio in the lock body is improved.

Description

technical field [0001] The invention relates to an anti-theft door lock, in particular to an anti-theft door lock with a secondary lock. Background technique [0002] The anti-theft door lock is used to lock the anti-theft door. When the anti-theft door lock realizes the locking of the anti-theft door, the lock bolt in the anti-theft door lock is inserted into the lock bolt hole provided on the door frame. The lockbolt overwhelming majority in the existing anti-theft door lock is straight bar type, and the pick-proof performance of this anti-theft door lock with straight bar type is not good. In order to increase the anti-prying performance of the anti-theft door lock, there is also an anti-theft door lock with an arc-shaped lock bolt or a hook-like tongue. The arc-shaped lock bolt or hook tongue moves around their pivots. Action, their action is driven by the toggle mechanism, the toggle mechanism is in contact with the dial block on the lock head, and the dial block drive...

AI Technical Summary

Problems solved by technology

Since the movement space inside the lock body is relatively small, and other movable parts need to be set in the lock body, the structure of the toggle mechanism is relatively complicated, and it is inconvenient to set the toggle mechanism in the lock body, and the arc lock The movement stability of the bolt is not good

The assembly position of the arc-shaped lock bolt or hook tongue in the lock body is relatively fixed, and a large space needs to be reserved in the lock body for the action of the arc-shaped lock bolt or hook tongue, which is not conducive to the miniaturization design of the anti-theft door lock

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