| 摘要 |
<p>PURPOSE:To return a key automatically to a place before revolution by a key- cylinder automatic return device when a key cylinder for a free turn type cylinder lock is rotated by a normal key. CONSTITUTION:A cylinder shaft 15 passed through the center of a sleeve 4 and projected from a key cylinder 5 and a pair of case shafts 13a, 13b projected from a case 3 are mounted on a key-cylinder automatic return device 2 for a cylinder lock device 1. A spring 10 is wound on one case shaft 13a, the cylinder shaft 15 is arranged between one case shaft 13a and the other case shaft 13b, and the cylinder shaft 15 and the other case shaft 13b are disposed between both ends of the spring 10. When a normal key is inserted into the key cylinder 5 and tuned and the key cylinder 5 is revolved to the sleeve 4, return force is applied to the cylinder shaft 15 conducting a circular motion in a circular groove formed to the case 3 by the spring 10.</p> |
