Title:
CYLINDER LOCK
Document Type and Number:
Japanese Patent JP3105167
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To settle a problem of being in danger of dishonest unlocking by impact destruction caused by beating the front of a plug with a hammer in a cutting destruction prevention type cylinder lock.
SOLUTION: A projected surface 15 crossing with the inside circumferential surface of a case 1' and the large diameter inside circumferential surface 16 extended to the front of the case 1' from the projected surface 15 are provided between the front of the case 1' and a driver pin hole 2. An expansion section 26 slidingly coming into contact with the large diameter inside circumferential surface 16 is provided on the circumferential surface of a plug 25 inserted into the case 1', and a buffer 28 having elasticity is inserted between the expansion section 26 and projected surface 15. Then, a ring section 27 slidingly coming into contact with the projected surface 15 can be provided between the projected surface 15 and expansion section 26.
Inventors:
Yoshiaki Yanagawa
Application Number:
JP10979696A
Publication Date:
October 30, 2000
Filing Date:
April 30, 1996
Export Citation:
Assignee:
Alpha Co., Ltd.
International Classes:
E05B15/00; E05B17/20; E05B27/00; (IPC1-7): E05B17/20; E05B15/00
Domestic Patent References:
| JP2164985A | ||||
| JP6200666A | ||||
| JP7217270A | ||||
| JP7279500A | ||||
| JP8177277A | ||||
| JP960362A | ||||
| JP5222392U |
Attorney, Agent or Firm:
Hideo Takino (1 outside)