Development of Rubber Contacts Used for Power Window Switches

We have developed a power window switch unit for use in multiplex wiring systems for automobile doors. As the systems are multiplexed, signal switches mounted on PC boards prove to be more advantageous than conventional switches having a metal spring and metal contact. We chose to use a rubber contact in one of the signal switches, and combined a good operational feeling into the rubber contact, thereby succeeding in designing a switch structure that requires less parts.

We expressed the operational feeling of the switch by four values, and designed the switch with the help of CAE to meet each of the values. We could therefore develop a rubber contact with an operational feeling as high as we had aimed without the need to make any prototypes.