Silent door lock

Abstract

The invention belongs to the technical field of door locks, and particularly relates to a silent door lock. The silent door lock comprises a first lock block and a second lock block. The included angle between a first slope on a limiting block designed in the silent door lock and the end face of a door frame and the included angle between a second slope on the limiting block and the end face of the door frame are small, when a square bolt impacts the first slope on the limiting block, due to the fact that the impact face is the slope, therefore, the impact sound is smaller than that of vertical impact, and the noise caused by the first-time impact in the background is reduced to a certain extent; after the limiting block slides to be disengaged from the square bolt, the square bolt can cross the first slope on the limiting block, at the moment, the sliding block slides towards the outer side of a mounting shell under the action of a reset spring, meanwhile, the limiting block resets under the action of a return spring, so that the second slope on the limiting block is matched with a slope on the square bolt; and due to the fact that the distance at which the limiting block moves out again after moving back is much smaller than the distance at which a traditional square bolt moves after being disengaged from a metal sheet, noise caused by second-time impact in the background isreduced.

Description

technical field [0001] The invention belongs to the technical field of door locks, in particular to a silent door lock. Background technique [0002] With the improvement of the quality of life, household door locks, especially bedroom door locks, have a need for quietness, and the demand is getting higher and higher. [0003] A general door lock is padlocked by a single-sided beveled bolt. In the process of closing the door, the deadbolt first collides with the metal sheet with the keyhole on the door frame. When it is inside, the separation between the inclined surface and the metal sheet will cause the lock tongue to collide in the process of instantaneously from the pressed state to the extended state. [0004] The current technology achieves the purpose of silence by adding bearing rollers or adding nylon materials to the deadbolt, but this method only solves the first above-mentioned impact sound, and the second impact sound is not resolved. [0005] The present inve...

AI Technical Summary

Problems solved by technology

[0004] The current technology achieves the purpose of silence by adding bearing rollers or adding nylon materials to the lock tongue, but this method only solves the first impact sound mentioned above, and the second impact sound has not been resolved.

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