| 摘要 |
PURPOSE:To reduce the quantity of parts, make smaller a distance between a fixed contact point and a movable contact point, and ensure proper operation by forming an integrated construction of a spacer, an electronic parts mounting recess and a printed circuit on the injection molded fixed contact point board of a membrane switch containing built-in electronic parts such as an LED. CONSTITUTION:A spacer 2, a parts mounting recess 3 and a printed circuit 4 are formed on a fixed contact point board. An electronic part 5 to be mounted in the recess 3 is an integrated effective component like an emitter including an LED, a liquid crystal panel and a solar battery. And a land and the like are provided in the circuit 4 for interconnecting a fixed contact point, a switching circuit and the electronic part 5. In forming the aforesaid board 1, a transferal material 8 with the circuit 4 formed thereon is fixed in a metal mold 9 for injection molding and the circuit 4 is transferred to the surface of the molded product of a base sheet 7 via the heat and pressure of injection resin. |
