| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify a reception circuit by generating a resistance value corresponding to the opening/closing operation of one or plural switches, detecting the change of a DC voltage or current inside a loop, specifying an operated switch and operating a chair unit. SOLUTION: Keyboards 5 and 6 and a fit switch 7 are connected by signal pair lines 20 and 20' for a serial resistance circuit. Thus, viewing from the side of an A/D converter 112, when one of one or plural keys or switches is depressed and closed, the closed loop of a different resistance value is formed every time. By A/D converting the resistance value in an A/D conversion circuit 112 and inputting it to a CPU 10, the resistance value is converted to the voltage or the current and measured and which key or switch is operated is specified. This chair unit is operated by the specification. By this constitution, the constitution is simplified, manufacture is facilitated, a cable amount is reduced and weight is reduced.</p> |
