Title:
CRIME PREVENTION THUMB-TURN
Document Type and Number:
Japanese Patent JP2005061200
Kind Code:
A
Abstract:
To solve the problem that unlocking is conducted comparatively easily by directly turn a thumb-turn provided on the interior side by inserting a wire, a tool or the like from a gap of a door, a door scope or from a slot in a mailbox, since the form of a knob part of the thumb-turn used as a door lock is flat.
An outer periphery of the thumb-turn is formed to be round and its surface is made to be smooth so that it may not be turned by the wire, the tool or the like from the outside.
More Like This:
| JP4953938 | Security thumb turn |
| JP3561445 | Door lock structure |
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Inventors:
TAKAHASHI KOKI
Application Number:
JP2003332447A
Publication Date:
March 10, 2005
Filing Date:
August 18, 2003
Export Citation:
Assignee:
TAKAHASHI KOKI
International Classes:
E05B13/08; (IPC1-7): E05B13/08