| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery-operated electronic key capable of sufficiently securing a flying distance even when a battery becomes exhausted and capable of extending a battery life; and to provide an electric lock system using the electronic key. SOLUTION: The battery-operated electronic key 2 is used for the electric lock system which controls the locking and unlocking of an electric lock on the basis of the result of determination of validity of ID data. The electronic key 2, which performs ID data communication by means of electromagnetic waves for an inquiry, includes: a reception circuit 22 which receives the electromagnetic waves for the inquiry; a transmission circuit 24 which transmits the ID data; a charging circuit 25 which repeats a charging operation by the reception of the electromagnetic waves for the inquiry; and a control portion 23 which measures a power supply voltage when the charging circuit 25 is charged with the electromagnetic waves for the inquiry, received by the reception circuit 22, and which controls the transmission circuit 24 so that it can transmit the ID data, when the measured power supply voltage is a target voltage or above. COPYRIGHT: (C)2010,JPO&INPIT
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