| 摘要 |
PURPOSE:To simplify wiring processing and to easily perform assembling and maintenance/inspection by forming the wiring pattern of the fixed part of a stroke sensor on the plane on one side of a printed circuit board, and the fixed contact of a key switch and its wiring pattern on the plane on the other side, respectively. CONSTITUTION:The fixed contact groups of a touch-response switch 30 in accordance with each key are formed on the surface of an insulating substrate 19a in the arranging direction of a key. Each fixed contact group consists of a pair of contact patterns 35a, 35b comprising a first fixed contact 35, a pair of contact patterns 36a, 36b comprising another first fixed contact 36, and a pair of contact patterns 37a, 37b comprising a second fixed contact 37. Conductive patterns 71 for supplying a large number of power sources are formed on the back plane of the insulating substrate 19a by providing land parts 71a which form power source supply terminals in parallel in a longitudinal direction. |
