| 摘要 |
PROBLEM TO BE SOLVED: To provide a switch device capable of surely detecting pressing operation of switches. SOLUTION: The switch device SW is provided with four switches 20a to 20d connected in parallel. A fixed contact point 202a of each switch 20 is connected with the other through a first wiring 203a, and a movable contact point 202b of each switch 20 is connected with the other through a second wiring 203b. Further, each first wiring 203a is equipped with a first terminal T1 at its one end. Moreover, each second wiring 203b is likewise equipped with a second terminal T2 at the same end side where the first terminal T1 is fitted. A fixed current Iin is supplied to the first terminal T1 from a current supply part 20A, so that, if either of the switches 20 is on, the current flows from the first terminal T1 to the second T2. A voltage detection part 20B measures a voltage between both terminals when the current Iin flows from the first terminal T1 to the second T2. COPYRIGHT: (C)2010,JPO&INPIT |
