| 摘要 |
<p>PURPOSE:To prevent unfair unlocking by providing no play between a cylinder inner and a key lever, and long holes and a connecting pin to the connection between a lock plate and a key rod. CONSTITUTION:A door locking device consisting of a base 1, an opening operation lever 2, an open lever 3, a lock plate 4, and a guide plate 20 is provided. Next a circular arc-shaped guide hole 21 and a long hole 22 shorter than the hole and of the same diameter are formed respectively on the guide plate 20 and the plate 4 centered on a supporting shaft 7. A key lever 15 is mounted integrally to the cylinder inner 14 of a cylinder lock 13. One end of a key lod 16 is connected to the lever 15, and the other end is slidably connected through a connecting pin 23 to the holes 21, 22. A shoulder part 11 is then retracted from a projecting piece 12 by turning operation of a key to be locked. Since there is no play between the inner 14 and the lever 15, the turning movement of the lever 15 by a tool other than the key is impossible. Thus, burglary, etc., can be prevented.</p> |
