Title:
AUTOMATIC RETURN DEVICE FOR KEY CYLINDER OF CYLINDER LOCK DEVICE
Document Type and Number:
Japanese Patent JP3298737
Kind Code:
B2
Abstract:
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.
Inventors:
Keiichi Miyamoto
Application Number:
JP9273794A
Publication Date:
July 08, 2002
Filing Date:
April 28, 1994
Export Citation:
Assignee:
Alpha Co., Ltd.
International Classes:
E05B17/20; E05B17/00; E05B17/04; E05B29/04; E05B15/04; (IPC1-7): E05B29/04; E05B17/20
Domestic Patent References:
| JP559850A |
Attorney, Agent or Firm:
Keiichi Shimizu
Previous Patent: PORTABLE TYPE ELECTRICAL INSTRUMENTATION DEVICE FOR CAR
Next Patent: COMMUNICATION UNIT
Next Patent: COMMUNICATION UNIT