To enable a switch configuration having a small plane space, i.e., miniaturization of a switch.

Among a plurality of switch means arranged on the inner surface of a bottom plate of an insulating case, a switch mean in the center is formed as a push-switch comprising a fixed contact on the bottom side and a diaphragm-spring-shaped movable contact superimposed on the fixed contact. Other switch means are leaf-switch having two contact spring strips and surround the center switch mean being placed at every equal angle.