An oblique tongue anti-theft door lock

Abstract

The invention discloses an anti-theft door lock with oblique tongue, which comprises a panel, a shell, a buckle plate, a key, an oblique tongue, an oblique tongue drag plate, a twisting device, a travel and axial limit device and a safety locking device. The twisting device comprises a knob spring, a knob set on the outer periphery of the knob spring, a lock cylinder built in the center of the knob spring and a transmission plate, and the transmission plate connects the knob spring with the tongue drag plate. The stroke and axial limit device includes a stroke limit groove, a limit block and a limit torsion spring. The other end of block fits with limit torsion spring. The safety locking device includes a slide block fixedly connected with the slant tongue drag plate and a toggle block arranged at the bottom of the slide block; the other end of the slide block is connected with the lock cylinder. After adopting the above structure, the radial movement stroke of the oblique tongue can be limited, and the oblique tongue can be compressed and locked in the axial direction, and it can be locked outdoors without a key, which is convenient to use.

Description

technical field [0001] The invention relates to a hardware lockset, in particular to an oblique bolt anti-theft door lock. 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 lock tongue inside, a twi...

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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