Auxiliary safe lock

Abstract

The invention discloses an auxiliary safe lock which comprises an actuating plate, a latch bolt, an anti-theft bolt, an abutting part clamping bolt, a straight tongue and a dormant lock. The abutting part clamping bolt on the anti-theft bolt supports the actuating plate at ordinary times; if the anti-theft bolt is independently pushed, the abutting part clamping bolt cannot move due to the fact that the actuating plate abuts against the abutting part clamping bolt; however, when the anti-theft bolt and the latch bolt retract inwards at the same time, the latch bolt supports and upwards pushes the actuating plate. After the latch bolt, the anti-theft bolt and the straight tongue correspond to a receiving opening seat on a door frame, the latch bolt is firstly pushed into a receiving opening seat hole, at one moment, the actuating plate is not supported by the latch bolt and the abutting part clamping bolt and then is pushed downwards, and the straight tongue is pushed out and enters the receiving opening seat hole in the door frame. Thus, the latch bolt must be pushed out after being pushed into the receiving opening seat hole, and therefore it can be ensured that the position of the straight tongue corresponds to a straight tongue hole in the door frame and locking is truly achieved. In addition, the dormant lock can be locked indoors through a knob, or the dormant lock is quickly unlocked by pressing down a door handle; besides, the dormant lock can be unlocked outdoors through a key, so that the safety protection and locking effects are improved.

Description

technical field [0001] The present invention is a locking device, especially an auxiliary safety lock which can be arranged on the door panel of the entrance and exit of a building and can control the entrance and exit in the state of unlocking or locking. Background technique [0002] see Figure 17 and Figure 18 As shown, the automatic lock of the prior art includes a lock housing 210, an anti-theft bolt 220, an oblique tongue 230, a straight tongue 240 and an actuating plate 250; the lock housing 210 is provided with a locking side plate 211; the anti-theft bolt 220, the oblique tongue 230 and the straight tongue 240 protrude selectively outside the locking side plate 211 of the lock housing 210, the anti-theft bolt 220 and the oblique tongue 230 are pushed by springs respectively to protrude outside the locking side plate 211, and the straight tongue 240 Then be constrained by the operating plate 250; the operating plate 250 is uprightly arranged in the lock housing 21...

AI Technical Summary

Problems solved by technology

[0004] However, the shortcoming of the automatic lock of the prior art is that when the door leaf is closed, the anti-theft bolt 220 only needs to be slightly pushed inward for a small distance, and the actuating plate 250 will break away from the anti-theft bolt 220 at once and move down rapidly and push the straight tongue 240 out. , but at this time the position of the straight tongue 240 may not correspond to the door frame at all, so the protruding straight tongue 240 may abut against the outside of the door frame, resulting in the door leaf being unable to close

Furthermore, the prior art uses a straight tongue to lock the door leaf, and there are no other locking components that still have problems such as deficiencies in the anti-theft effect.

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