Title:
CYLINDER LOCK AND LOCKING-RELEASING KEY USED FOR THE SAME
Document Type and Number:
Japanese Patent JP3432433
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a cylinder key and a key, in which the locking-releasing key is difficult to be duplicated and malfeasant release operation is incapable.
SOLUTION: A plug 2 is inserted rotatably into a plug case 1, the two groups of a group, in which the pair of tumbler pins 5, which are moved forward and retreated at different angles to the wide surfaces of a locking-releasing lock 3 put into the plug and in which axial center lines are crossed on the rotational central axis of the plug, are arrayed by imparting urging force in the central direction so that the tumbler pins belonging to the different groups are arranged alternately in the rotational central axis direction, and the end sections of the tumbler pins are placed on the rotational boundary surface of the plug case 1 and the plug and the turn of the plug is permitted when the correct locking-releasing key is inserted into the plug. One tumbler row of the tumbler groups is disposed at a place, where the crossed axes angles of the tumbler pairs in the other tumbler groups are divided, and V-shaped projecting sections functioning as guide rails for the key in combination are formed to a key inserting hole 8.
Inventors:
Shunichi Nagata
Application Number:
JP31035798A
Publication Date:
August 04, 2003
Filing Date:
October 30, 1998
Export Citation:
Assignee:
Alpha Co., Ltd.
International Classes:
E05B19/04; E05B27/00; E05B27/02; E05B27/10; (IPC1-7): E05B27/10; E05B19/04
Domestic Patent References:
| JP5646072A | ||||
| JP7158328A | ||||
| JP9170363A | ||||
| JP5824071A | ||||
| JP654872U | ||||
| JP6334861U | ||||
| JP281873U |
Attorney, Agent or Firm:
Masao Yamakawa
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