Mortise lock

Abstract

The invention discloses a mortise lock. The mortise lock comprises a lock shell, a main lock tongue, a main lock tongue return spring, a trigger, a trigger return spring, a main lock tongue positioning plate, a slide plate and a safety block, wherein the main lock tongue positioning plate has two support legs; the first support leg fits a limiting block for locking the main lock tongue; the slide plate is slidingly arranged on the main lock tongue; the safety block has a clamping hook; and after the main lock tongue shrinks back into the lock shell, the safety block rotates, and the clamping hook fits the end part of the slide plate, so that the slide plate moves to the trigger direction to butt against the trigger so as to prevent the return of the trigger. When the main lock tongue shrinks into the lock shell, the safety block rotates to enable the clamping hook to fit the second end of the slide plate, the slide plate is butted against the trigger, and the safety plate moves to enable a drop preventing surface to fit a clamping block so as to prevent the main lock tongue from sliding outside the lock shell; and in the state, an inclined tongue fitting the trigger can freely shrink and extend, the main lock tongue is always locked, and the mortise lock can serve as a passage lock.

Description

technical field [0001] The present invention relates to door locks, in particular to mortice locks. Background technique [0002] The mortise lock is also called the mortise door lock. It is generally composed of three parts: a handle, a lock cylinder and a lock body. It is mostly installed on indoor suit doors and anti-theft doors. It is also one of the most common locks on the market. The existing mortise locks mainly include single dead tongue mortise locks, single dead tongue button mortise locks and double tongue mortise locks, wherein the double tongue mortise locks are equipped with dead tongues and oblique bolts, and their anti-theft performance is better than that of single dead tongues. Mortise locks and single-bolt button mortise locks are high, and can be divided into single-action mortise locks, double-action mortise locks and quick-release mortise locks according to the function of the handle, which are easy to use. [0003] In the prior art, there has also be...

AI Technical Summary

Problems solved by technology

Solve the problem that the mortise lock that can be locked automatically in the prior art cannot be used as a channel lock

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