An oblique bolt anti-theft door lock capable of axial locking

Abstract

The invention discloses a safe-guard door lock with a latch bolt capable of being axially locked. The safe-guard door lock comprises a panel, a housing, a buckle plate, a key, the latch bolt, a latch bolt dragging plate, lock tongue hooks, a twisting device, a stroke and axial limiting device and a security locking device, wherein a latch bolt reed is arranged on the bottom of the latch bolt dragging plate; two symmetrical lock tongue hooks are mounted on the latch bolt dragging plate, and a lock tongue is arranged on each lock tongue hook; the stroke and axial limiting device comprises a stroke limiting slot, a limiting block and a limiting torsion spring; the stroke limiting slot is formed in one side of the latch bolt dragging plate; one end of the limiting block is positioned in the stroke limiting slot; the other end of the limiting block is fitted with the limiting torsion spring; the security locking device comprises a slide block and a stirring block; and the other end of the slide block is connected with a lock cylinder. After adopting the structure, the safe-guard door lock can limit a radial moving stroke of the latch bolt, and the latch bolt is axially pressed and blocked, so that axial locking capacity is higher, the safe-guard effect is better, back locking can be realized outdoors without the key, and the use is more convenient.

Description

technical field [0001] The invention relates to a hardware lock, in particular to an oblique bolt anti-theft door lock capable of axial locking. Background technique [0002] A door lock is a device installed on the door to lock the door to prevent others from opening it easily. There are many types of door locks, including mechanical and electronic. According to different usage occasions and usage requirements, the types are different One, but the vast majority of door locks should have a common feature, that is, anti-theft, so people make a big fuss about door locks on anti-theft, and various anti-theft door locks emerge in endlessly, and among many anti-theft door locks, The most common type of anti-theft door lock is mechanical. [0003] Mechanical anti-theft door locks are mainly manual unlocking methods. They are reasonably priced, have high mechanical strength, and are more convenient to install and maintain. Therefore, they have a large market share. There is a loc...

AI Technical Summary

Problems solved by technology

[0005] 1. The radial movement stroke of the lock tongue is controlled by the lock tongue spring and the twisting device. The lock tongue is easy to shrink into the lock housing, causing the lock tongue to be stuck.

[0006] 2. The lock tongue cannot be limited and locked in the axial direction, and some thieves exert an axial force on the door lock when they pry the door. If the anti-theft performance of the anti-theft door is greatly reduced

[0007] 3. When anti-locking outdoors, you need to use a key to lock it, which is inconvenient to use

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