A silent door lock

Abstract

The invention belongs to the technical field of door locks, and particularly relates to a silent door lock, which includes a first lock block and a second lock block, and the distance between the first slope and the second slope on the limit block and the end surface of the door frame designed in the present invention The included angle is small. When the square bolt hits the first inclined surface on the limit block, because the impact surface is an inclined surface, the sound of the impact is smaller than that of the vertical impact, which reduces the first time mentioned in the background to a certain extent. The noise caused by the impact; after the limit block slides to disengage from the square lock tongue, the square lock tongue will cross the first slope on the limit block, and at this time, the slider slides to the outside of the installation shell under the action of the return spring of the slider. Simultaneously, the limit block resets under the action of the return spring, so that the second slope on the limit block cooperates with the slope on the square dead bolt; The distance the metal piece travels after breaking away is much smaller, reducing the noise caused by the second impact in the background.

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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