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Patent Searching and Data


Title:
DISPLACEMENT DETECTION DEVICE AND MAGNET DEVICE
Document Type and Number:
Japanese Patent JP2010250574
Kind Code:
A
Abstract:

To correctly detect magnetic displacement by enabling a plurality of magnets with different magnetic forces to be compatible.

A displacement detection device detects displacement, such as, opening and closing of a window by detecting magnetic force of a magnet device arranged on a monitoring object, such as the window with a magnetic sensing element. A magnet 14B includes a second magnet 200, which generates the same magnetic force as a first magnet with a plate shape but differs from the first magnet in dimension; and a yoke 202, which is arranged at the second magnet so that the second magnet 200 provides the same magnetic force pattern as that of the first magnet.


Inventors:
SHIMA YASUSHI
TSUNODA MASAYUKI
Application Number:
JP2009000099636
Publication Date:
November 04, 2010
Filing Date:
April 16, 2009
Export Citation:
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Assignee:
HOCHIKI CO
CIRCUIT DESIGN KK
International Classes:
G08B13/08; E05B45/06; H01H36/00
Domestic Patent References:
JP2004020491A2004-01-22
JPH10172402A1998-06-26
JPS6412441A1989-01-17
JP2002216286A2002-08-02
Attorney, Agent or Firm:
竹内 進