Push-on switch

A push-on switch, comprising:

• a switch case made of insulating resin opening upward;
• a central fixed contact disposed on the inner bottom of said switch case;
• two peripheral fixed contacts disposed with said central fixed contact therebetween on the inner bottom of said switch case;
• connecting terminals individually electrically connected to said central fixed contact and said two peripheral fixed contacts at the periphery of said switch case;
• a first movable contact made of elastic sheet metal, which is provided with a hole at the center thereof, wherein said first movable contact includes a ring portion, and a projection extended to the right and left of said ring portion, and said first movable contact is disposed in said switch case in such manner that said ring portion is arranged above said two peripheral fixed contacts in confronting spaced relation thereto;
• a second movable contact having a dome portion curved upward in spherical shape, which is disposed on said ring portion of said first movable contact;
• and
• a driving means having a pressing portion for pressing said dome portion of said second movable contact, which is arranged above the second movable contact and is vertically movable.