Door lock latch bolt drive mechanism

Abstract

The invention relates to a metal door lock part, and discloses a door lock latch bolt drive mechanism. The door lock latch bolt drive mechanism is provided with a lock box assembly, a latch bolt assembly, a rotary damper, a shifting core, a latch bolt shifting plate and a shifting core torsion spring, wherein the rotary damper is screwed and fixed in the lock box assembly, the latch bolt assembly is placed in the lock box assembly, a rack arranged on the latch bolt assembly is meshed with a damping gear of the rotary damper, the shifting core is embedded and fixed in the lock box assembly, and the latch bolt shifting plate and the shifting core torsion spring are arranged on the latch bolt assembly in a penetrating manner. The shifting core is clockwise rotated to drive the latch bolt shifting plate to rotate, the latch bolt shifting plate drives the latch bolt assembly to retract, so that the purpose of opening a door is achieved; when no external force is applied to the shifting core, because of an elastic force action of the shifting core torsion spring, the shifting core and the latch bolt shifting plate return an initial position, a reset spring pushes the latch bolt assembly out, and thus the purpose of closing the door is achieved. In a movement process of opening the door and closing the door, due to the action of the rotary damper, the latch assembly moves slowly, and thus the collision noise among parts is reduced.

Description

technical field [0001] The invention relates to a hardware door lock accessory, in particular to a lock body part of the door lock. Background technique [0002] The invention relates to the technical field of locks, and refers to a matching structure of internal parts of a lock body. At present, the structural design widely used in the market is to only rely on the elastic force of the spring to control the expansion and contraction of the latch tongue. During the process, the movement will not stop until the bolt hits the limit mechanism of the bottom box of the lock body. The instantaneous rapid impact between the bolt and the limit structure of the bottom box will generate a lot of noise and bring discomfort to people. Contents of the invention [0003] The invention provides a locking tongue driving mechanism of a door lock, the purpose of which is to reduce the operating noise of the door lock, make the opening and closing of the door lock more silent, and have bett...

AI Technical Summary

Problems solved by technology

At present, the structural design widely used in the market is to only rely on the elastic force of the spring to control the expansion and contraction of the latch tongue. During the process, the movement will not stop until the oblique tongue hits the limit mechanism of the bottom box of the lock body. The instantaneous rapid impact between the oblique tongue and the limit structure of the bottom box will generate a lot of noise and bring discomfort to people.

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