| 摘要 |
PROBLEM TO BE SOLVED: To prevent breake of a switch even if operator presses too strong. SOLUTION: A case 11 is provided so as to cover substantially a part above a wiring board 10, a panel 12 is provided on an upper face side of the case 11, and an operation plate 15 is provided by jointing it on an upper face of the panel 12. A switch pressing part 14 is provided through a spring part 13 capable of bending and deforming in the vertical direction on the panel 12, a tack switch SW is provided below the switch pressing part 14, and a stopper part 17 regulating downward displacement of the switch pressing part 14 is provided in the case 11 so that a pressing force on the momentary switch SW does not exceed a fixed force. |
