The original reverse key unlocks the anti-safety latch door lock

Abstract

A door lock with a reverse safety latch capable of being opened through an original back-face key comprises a lock cylinder body (1), an angle safety latch rotating body (6), a middle selection spring (8), a safety latch opening and closing hook (12), a shifting fork (26), a pull hook thruster (28) and spring slope edges (33). The lock cylinder body (1) is provided with an external lock cylinder (2) and an internal lock cylinder (14). A front-face key (3) is inserted into the external lock cylinder (2) and turned to open a spring bolt switch (13) to push and open a plunger latch locating tongue (21) and a bolt clamp (20), so that the bolt clamp (20) is released from control, a plunger latch, a bolt hook a (17) and a bolt hook b (25) are unlatched in position, the reverse-face key (3) is inserted into a keyhole of the external lock cylinder (2) and turned by 90 degrees, the safety latch opening and closing hook (12) is released to hook a pull hook (24) at the lower end of the pull hook thruster (28), the pull hook (24) opens downwards by an amplitude to pull the connected fork (26) on a safety latch elastic shift fork shaft (27) to open or retract a safety latch (23). The door lock with the reverse safety latch capable of being opened through the original back-face key can achieve door safety for people and is a scientific achievement earnestly longed for by people.

Description

(1) Technical field [0001] The invention relates to an improved invention of a mechanical anti-theft door lock for commercial buildings. (2) Background technology [0002] With the improvement of human living standards, the pursuit of grandeur and luxury is the common goal of people. However, there are various high, medium and low-grade anti-theft door lock cylinders with boldness and luxury in the world market. The door lock bolt lacks the function of locking the anti-theft door safety back by a key. There are the following hidden dangers in the technical structure of the existing lock cylinder control rotation system with a single function; a. This technology has a long history of development and use, and has a single function. No matter what safety control function is added, it still relies on the two-sided alike key to control the code to open and lock the latch. This technology has been mastered by professional lock matching technicians and social illegal personnel. I...

AI Technical Summary

Problems solved by technology

[0005] The invention discloses an anti-theft latch door lock with an original key on the reverse side, which solves the problem that the existing commercial house mechanical anti-theft door lock only has a traditional single-function latch control mechanism, and lacks the function of using the original key to reverse the anti-theft latch safety lock. , a technical defect that greatly reduces the safety and anti-theft coefficient

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