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Patent Searching and Data


Title:
KEY DEVICE AND ELECTRONIC EQUIPMENT PROVIDED WITH THIS
Document Type and Number:
Japanese Patent JP2005228632
Kind Code:
A
Abstract:

To provide a key device in which discrimination property of the key and user-friendliness of the person in charge are improved while power consumption is reduced, and also to provide an electronic equipment provided with this.

A Clark key 10 is provided with a metal ring 102, while a key reader 11 is provided with a magnetic sensor 113 and a magnet ring 115. Since a change occurs in the distribution of magnetic field of the magnet ring 115 between the state in which the Clark key 10 is mounted on the key reader 11 and the state in which it is dismounted, this change is detected by the magnetic sensor 113 to find out the mounting state of the Clark key 10. Only when the Clark key 10 is mounted, electric waves for questioning are emitted via an antenna 111 provided at the key reader 11, and key data stored in a transponder 101 provided at the Clark key 10 is read by wireless communication.


Inventors:
YAOI TAIICHI
HASHIMOTO HIDETAKA
Application Number:
JP2004037024A
Publication Date:
August 25, 2005
Filing Date:
February 13, 2004
Export Citation:
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Assignee:
SHARP KK
International Classes:
G07G1/00; G06K17/00; H01H27/00; (IPC1-7): H01H27/00; G06K17/00; G07G1/00
Attorney, Agent or Firm:
Keiichiro Saikyo
Takeshi Sugiyama
Minetarou Hirose