Double linkage lock

Abstract

The invention relates to a double linkage lock, which is provided with a lock case, wherein an inclined tongue, an inductive inclined tongue, a straight tongue and a plurality of rivets are arranged in the lock case; the inclined tongue and the inductive inclined tongue maintain a simultaneous action relationship through an inductive linkage plate; the inductive linkage plate is connected with a straight tongue driving plate; the straight tongue driving plate drives the straight tongue to act; the inductive linkage plate can ensure that the inclined tongue and inductive inclined tongue are not hindered and can perform simultaneous action when a door is closed, so that the condition that the straight tongue driving plate cannot perform action successfully caused by non-synchronous action of the inclined tongue and inductive inclined tongue at present is improved; and according to an auxiliary positioning part and a top jacking groove, which are specially designed, of the straight tongue driving plate, the straight tongue driving plate can abut against the rivets of the lock cased, so the condition that the straight tongue cannot be locked at once caused by external force obstruction can be avoided.

Description

technical field [0001] The invention relates to a door lock, in particular to a security door lock which controls a straight tongue to achieve a secure locked state by simultaneously acting on a latch bolt and an inductive latch bolt. Background technique [0002] The door lock is an indispensable device in daily life. It is installed on the door panel at the entrance and exit of the building. Generally speaking, the opening and closing of the door panel at the door frame is performed through the door lock bolt. It is achieved by the expansion and contraction of the door frame; even if you want to further ensure that the door lock cannot be easily damaged or opened by external force when the door lock is in the locked state, you must ensure that the lock bolt will not be damaged by any external force or Therefore, the deadbolt can keep extending out of the door lock to ensure that the door lock reaches the locked state. [0003] A door lock of the prior art, such as a self-...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to improve the prior art. Because the oblique tongue and the elastic sensor cannot move smoothly and synchronously, the door lock cannot be locked, and the deadbolt drive plate is easily hindered by external force, so that the lack of locking cannot be achieved. By implementing the technical means of the present invention, it is ensured that the latch tongue and the sensing latch latch can perform synchronous action no matter they are hindered by any external force, so that the straight tongue transmission plate can move downward, and the straight tongue can still be achieved without being affected by external force. Definitely locking effect

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