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1. (WO2016062158) NOVEL MUTE DOOR LOCK

Pub. No.:    WO/2016/062158    International Application No.:    PCT/CN2015/087570
Publication Date: Fri Apr 29 01:59:59 CEST 2016 International Filing Date: Fri Aug 21 01:59:59 CEST 2015
IPC: E05B 63/14
E05B 15/00
Applicants: GUANGDONG JUSEN HARDWARE PRECISION MANUFACTURING CO., LTD.
广东炬森五金精密制造有限公司
Inventors: QI, Zhi
戚志
Title: NOVEL MUTE DOOR LOCK
Abstract:
Disclosed is a mute door lock, comprising a lower seat plate (1), a lining plate (2) and an oriented plate (3) provided on the lower seat plate (1), wherein a latch bolt (4) is mounted on the oriented plate (3) via a guide rod (5) at the tail end of the latch bolt in such a way that it can slide forward and backward, the latch bolt (4) is inserted into a bolt hole (21) of the lining plate (2), a spring (53) is sheathed onto the guide rod (5), which abuts between the oriented plate (3) and the latch bolt (4) and always pushes the latch bolt (4) outward, a tail part of the guide rod (5) is provided with a restoration plate (51) which abuts against a linkage mechanism supported by a cushion cylinder (6), the linkage mechanism drives the cushion cylinder (6) to stretch when the latch bolt (4) draws back to unlock, the cushion cylinder (6) serves for cushion and restoration when the latch bolt (4) moves forward to lock, such that the latch bolt (4) moves forward slowly until the cushion cylinder (6) is restored to an original point. The cushion cylinder (6) is connected to the latch bolt (4) via the linkage mechanism, which can make the latch bolt (4) restore slowly, avoiding the noise generated when the traditional latch bolt is restored quickly.