| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a keyless entry system for efficiently unlocking a door in the case of battery exhaustion even if the user does not take along a battery or a mechanical key. <P>SOLUTION: The keyless entry system uses a thermoelectric element 41 as a power source of a key 43 for use therein. The thermoelectric element 41 generates heat only by receiving the body heat of the user transmitted thereto, to thereby supply electric power to a wireless circuit 45. According to the system, the door can be efficiently unlocked without using introducing power supply, so that a space for mounting an electromagnetic oscillator therein is dispensed with and a huge amount of electric power for operating the electromagnetic oscillator is eliminated, which contributes to convenience of the system. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
