| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a locking-unlocking device which can be miniaturized while improving crime prevention performance, by simplifying a structure, by omitting a dead bolt.SOLUTION: A locking-unlocking device 11 is provided with: a cylinder 13 for rotating a cam piece 29 fixed to an inner cylinder when the inner cylinder becomes freely rotatable by 360 degrees in the reciprocal direction to an outer cylinder part by inserting a duplicate key into the inner cylinder; a lock box 15 for internally storing the cylinder 13 built on the door end side of a door 23 and expressing a key hole of the inner cylinder on a door surface; a latch bolt 17 slidably provided inside the lock box 15 and advancing to and retreating from a butt end 59 of the door 23 by an operation member provided in the door 23; and a stopper 19 having a regulation piece 101, slidably provided in the lock box 15, moved to one or the other slide end by the cam piece 29 rotated in the reciprocal direction and held by the lock box 15, and thereby the regulation piece 101 checking a retreat of the latch bolt 17 or releasing checking by approaching or retreating to a moving locus of the latch bolt 17.</p> |
