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Patent Searching and Data


Title:
CASE HAVING LOCKING DEVICE
Document Type and Number:
Japanese Patent JP2001234656
Kind Code:
A
Abstract:

To easily check that a lid is opened without using any key from the outside of a case.

An opening part 11a of a case body 11 is opened/closed by a lid 12, and a key hole 18a in which a key 14 can be inserted is formed in a lock 13 provided in the case body and the lid. The lock is fixed with the lid closed, and the lid is unfixed by inserting the key in the key hole. A magnetic sensor which is electrically opened when the magnetic field by a first permanent magnet is detected is embedded between the key hole and the first permanent magnet embedded in the lock around the key hole, and a second permanent magnet embedded in the lock electrically opens the magnetic sensor by canceling the magnetic field detected by the magnetic sensor when the key is inserted in the key hole. An opening/closing switch provided on the case body is connected to the magnetic sensor in series, and electrically opened/closed by opening/closing the lid. A self-holding circuit holds the alarm of an abnormality alarming unit based on each detected output of the opening/closing switch and the magnetic sensor.


Inventors:
GONDA TSUTOMU
SATO MASANORI
MORI TOMOHIRO
ENDO TAKANORI
YONEZAWA MASA
HACHIMAN SEIRO
Application Number:
JP2000000044234
Publication Date:
August 31, 2001
Filing Date:
February 22, 2000
Export Citation:
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Assignee:
YUUSEIDAIJIN
MITSUBISHI MATERIALS CORP
International Classes:
A45C13/18; E05B17/20; E05B45/06; E05B65/52; (IPC1-7): E05B65/52; A45C13/18; E05B17/20; E05B45/06
Attorney, Agent or Firm:
須田 正義