A security door lock device

Abstract

The invention discloses a safety door lock. The safety door lock comprises a locking dog component, a driving assembly and a locking device. The locking dog component is installed in a lock case; the driving assembly is used for driving a stirring structure to make the locking dog component contract back into the lock case or stretch out of the lock case; the locking device is used for locking the contraction or stretching motion of the locking dog component. The stirring structure comprises a boosting plate and a resetting piece, wherein the boosting plate slides in the length direction of a front panel of the lock case and is fixedly arranged on a locking dog installation plate in the moving direction of the locking dog component, and the resetting piece applies resetting force to the boosting plate to make the boosting plate slide towards a driving shaft. From the perspective of position and shape, a boosting structure arranged on the boosting plate is characterized in that when the boosting structure is pushed by the driving assembly to move in the moving direction of the locking dog component, the boosting structure moves away from the driving assembly under the action of the driving assembly so as to avoid motion interference with the driving assembly; at the last rotation stage of the driving assembly, the boosting structure moves towards the driving assembly under the action of the resetting piece and stretches out of the position where the boosting structure partially coincides with the driving assembly in the moving direction of the locking dog component.

Description

technical field [0001] The invention relates to an anti-theft door lock, in particular to a safety door lock device. Background technique [0002] All need to set anti-theft door lock on common anti-theft door lock, to realize the locking between anti-theft door and door frame. [0003] Chinese patent document CN201539160U discloses a kind of anti-theft door lock with hook tongue, in this anti-theft door lock with tongue hook, the dead bolt installation plate that installs dead bolt is provided with two lock heads suitable for the lock head device There are two upper and lower grooves where the shift fork is screwed in. There is also a clamp post formed on the deadbolt mounting plate, which locks the dead bolt mounting plate and a locking plate that can slide left and right. There are three card slots in the upper, middle and lower, and a biasing member is provided under the locking plate to exert a biasing force on the locking plate towards the lock head device. That is, ...

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that the anti-theft door lock in the prior art has high processing requirements and assembly precision requirements for related parts, and errors are prone to occur, the deadbolt cannot be completely locked out or retracted, and the door lock is stable. Poor performance, thereby providing a safety door lock device that is easy to process and assemble, and is not prone to errors and has good stability

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