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Title:
DOOR LOCK
Document Type and Number:
Japanese Patent JP2018091080
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a door lock that, when a component member fractures or breaks due to abrasion, deformation or fatigue, prevents indoor confinement accidents beforehand by enabling the emergency to be recognized visually while comprising an emergency unlocking function.SOLUTION: A cam arm 48 of a lever cam 46, which biases a latch bolt shaft 32 of a latch bolt 31 frontward and which is provided rotatably at the rear portion of the latch bolt shaft so that it is linked to a lever handle, is disposed so as to be engageable. A lock mechanism 61, which is capable of locking a locked state of the latch bolt, is provided around the rear end portion of the latch bolt shaft, and the lower end portion of a lock slide 63 of the lock mechanism is disposed movably in the retraction area of the latch bolt shaft. An engaging claw 57 or an engaging groove 58 is formed in a spring receptacle 54, which is disposed on the lever cam in an engageable manner, in order to bias the spring receptacle rearward. The engaging claw or the engaging groove is disposed so that it is engageable with an engaging claw or an engaging groove which is provided on the inner surface of a lock case 4 and/or a lock cover at the time of unlock rotation of the lever cam.SELECTED DRAWING: Figure 1

Inventors:
WATABE AKIMARU
YOSHIDA TAKAYUKI
Application Number:
JP2016236531A
Publication Date:
June 14, 2018
Filing Date:
December 06, 2016
Export Citation:
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Assignee:
NAGAWASA MFG CO LTD
International Classes:
E05B65/10; E05B55/00; E05B65/06
Domestic Patent References:
JP2016047746A2016-04-07
JP2017160724A2017-09-14
JPH0545724Y21993-11-25
JP5452637B22014-03-26
JP4828621B22011-11-30
JP2016041867A2016-03-31
Attorney, Agent or Firm:
千明 武