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Title:
CRIME PREVENTIVE ELECTRIC LOCK SYSTEM
Document Type and Number:
Japanese Patent JP2005188168
Kind Code:
A
Abstract:

To prevent locking and unlocking by an illegal act from an external part.

This crime preventive electric lock system controls the locking and unlocking of an electric lock 1A by controlling the existence of power source supply to a driving part 1a of the electric lock 1A via an electric wire 4a from a power source 2a of a controller 2A by connecting the electric lock 1A and the controller 2A by the electric wires 4 (4a to 4d). A disconnection detecting electric wire 3 is arranged so as to cover the electric wires 4 between the electric lock 1A and the controller 2A. This disconnection detecting electric wire 3 is composed of a wire rod including a conductor, and a predetermined voltage is applied to the conductor from the power source 2a. A change in the voltage applied to the conductor of the disconnection detecting electric wire 3 is detected by a disconnection detecting part 2b. A switching part 1b opens and closes a contact point 1c arranged in a part of the electric wire 4a on the basis of the detecting result of the disconnection detecting part 2b by the control of a control part 2c. The control part 2c cuts off the power source supply to the driving part 1a by opening the contact point 1c of the electric wire 4a when the disconnection detecting part 2b detects the change in the voltage.


Inventors:
HONDA KENSUKE
SUMIYA TAKESHI
MIYAMOTO ATSUSHI
Application Number:
JP2003000432050
Publication Date:
July 14, 2005
Filing Date:
December 26, 2003
Export Citation:
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Assignee:
MIWA LOCK KK
International Classes:
E05B45/14; E05B47/00; (IPC1-7): E05B45/14; E05B47/00
Attorney, Agent or Firm:
西村 教光
鈴木 典行



 
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