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Title:
CYLINDER LOCK
Document Type and Number:
Japanese Patent JPH11350806
Kind Code:
A
Abstract:

To provide a cylinder lock having a comparatively simple structure and making it difficult to unlock it.

This cylinder lock is provided with an outer cylinder 2 having front and rear end parts, an inner cylinder 3 mounted close to the rear end part inside the outer cylinder so as to turn, a latch 5 mounted close to the front end part inside the outer cylinder 3, and a key 11 capable of being inserted and pulled out inside the inner cylinder 3. A cam member 4 capable of turning in the forward and reverse directions coaxially with the inner cylinder 3 is provided between the inner cylinder 3 and the latch 5. The latch 5 comes into pressure-contact with a cam face 4a on which a cam follower 5a formed in a rear end part thereof is formed in the cam member 4 under energization of a spring 10 in the axial direction. In the key 11, a second insertion part 11d turning the cam member 4 by engaging with a rear end part of the cam member 4 is formed at a front end of a first insertion part turning the inner cylinder 3. An engaging part 14 for the second insertion part 11d of the key 11 is formed in the rear end part of the cam member 4. The cam face 4a and the cam follower 5a are constituted in such a way that the cam face 4a presses the cam follower 5a and the latch 5 advances against energization of the spring 10 when the cam member 4 is turned in either of the forward and reverse directions.


Inventors:
YAMAMOTO MANABU
Application Number:
JP1998000154137
Publication Date:
December 21, 1999
Filing Date:
June 03, 1998
Export Citation:
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Assignee:
TOCHIGIYA KK
International Classes:
E05B27/10; E05B55/00; E05B63/08; (IPC1-7): E05B27/10; E05B55/00; E05B63/08
Attorney, Agent or Firm:
白浜 吉治



 
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