| 摘要 |
<p>PURPOSE:To form a device in small size and light weight by providing in a transmitter a permanent magnet actuating a reed switch in a receiver with power in its side received to a side of the transmitter by an electromagnetic coupling system or the like. CONSTITUTION:When a transmitter 1 is placed approaching a receiver 13, a permanent magnet 2, provided in the transmitter 1, actuates the receiver 13 in its reed switch 14 feeding its output to a power feed part 26 through a control part 21. Next from the power feed part 26 to a power receiving part 3 of the transmitter 11, power is transmitted by an electromagnetic coupling system or the like. Subsequently, this power is converted in a rectifier smoothing circuit 6 into DC power actuating a transmitting part 7. The transmitting part 7 feeds a predetermined code signal received by the receiver 13, and the signal, after it is discriminated by an agreement discriminating means 16, is utilized for a desired remote control of locking and unlocking a door. In this way, the receiver 13 can be formed in a closed structure while eliminating the necessity for providing a battery in the transmitter 1.</p> |
