Heaven and earth door lock based on the principle of upper and lower linkage double safety locking

Abstract

The invention discloses an escape lock based on the up and down linkage double-insurance locking principle. The problems that the escape lock is complex in structure, high in cost and strict in mounting condition and mounting manner are solved. The escape lock comprises an upper lock head, an upper adjusting rod, a middle lock, a lower adjusting rod, a lower lock head and a push rod; the middle lock comprises a middle lock shell, a lock cylinder, a rotating piece, an upper sliding piece, a lower sliding piece and a shifting fork mechanism; the upper lock head comprises an upper lock shell, an upper plug pin shaft, a first spring and a touch locking mechanism; the lower lock head comprises a lower lock shell, a lower plug pin shaft and a second spring; and the escape lock has the beneficial effects of being simple in structure, easy and convenient to mount, high in unit integration degree, low in manufacturing cost, high in interchangeability and the like, is suitable for high speed rail and subway shielded gates with the quite high requirement and fire exit door escape locks of markets, supermarkets, theaters, auditoriums and the like and also can be suitable for mounting of a door body with the undetermined doorsill gap, and therefore the escape lock is suitable for being applied and popularized.

Description

technical field [0001] The invention relates to a heaven and earth door lock, in particular to a heaven and earth door lock based on the locking principle of upper and lower linkage double safety. Background technique [0002] Each type of lock has a difference in structure, which determines the difference in its function. For the needs of public security, it takes time to open the general lock whether it is opened inside or outside, and some special occasions require some locks that can be used. It is a door lock that can withstand the extrusion of a certain external force and can be easily opened from the inside and outside. Therefore, Tiandi lock came into being. [0003] The heaven and earth door lock is mainly composed of upper, middle and lower lock bodies, push rods and connecting rods. Press the push rod down to open the door. At present, Tiandi lock can be used as escape locks for fire doors in shopping malls, supermarkets, theaters, auditoriums, etc., but the str...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of complex structure, high cost, and strict installation conditions and installation methods, the present invention provides a heaven and earth door lock based on the principle of upper and lower linkage double safety locking. The structure of the world door lock is simple and applicable The door body is not fixed due to the sill gap, and the relative position of the upper lock, middle lock and lower lock can be slightly staggered by fine-tuning the adjustment lever

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