Title:
KEY CYLINDER
Document Type and Number:
Japanese Patent JPS5758774
Kind Code:
A
Abstract:
A cylinder lock is provided with means for preventing a cylinder from being extracted to improve safety against breakage of the lock. The preventing means comprises a deformable portion formed at an entrance of a keyhole of the cylinder and deformable into a radially expanded form when a force is applied to forcibly insert some object other than a correct key into the keyhole, and a stop portion formed in a casing of the cylinder lock for preventing the deformable portion in the deformed form from being extracted.
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Inventors:
MOCHIDA HARUO
Application Number:
JP13480680A
Publication Date:
April 08, 1982
Filing Date:
September 26, 1980
Export Citation:
Assignee:
NISSAN MOTOR
International Classes:
B60R25/01; B60R25/02; E05B9/04; E05B15/16; E05B17/00; (IPC1-7): B60R25/02; E05B9/04; E05B15/16