| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal transmitter capable of securing the stable transmission of signals between a sliding door and a car body main body part and performing bidirectional communication by a set of transmission/reception elements. SOLUTION: Coil elements 201a and 201b are respectively attached to a sliding door part and the car body main body part so as to be brought closer to each other at the time of closing the door part. At the time of transmitting control signals to an opposite side, since magnetic flux change for making a current corresponding to the control signals flow to the coil element on a transmission side is generated and electromotive force is generated in the coil element of a reception side, the control signals are reproduced on the reception side. Also, by switching which one of a transmission circuit and a reception circuit is to be connected to the coil element, one coil element is used both for transmission and reception and for reception. An electromagnetic induction phenomenon hardly receives the influence of stains stuck to the surface of the coil element and stable communication is secured. |
