Patent ID: 7368672

Claim:
A push-on switch comprising: a switch enclosure made of insulating resin and having a recess with an inner bottom and an open upper side; a movable contact disposed in the recess of the switch enclosure; a sheet disposed to cover the recess of the switch enclosure, the sheet having a center through hole; and a metal cover attached to the switch enclosure, the metal cover having a cover terminal and a pressing segment at a position corresponding to the position of the center through hole of the sheet, the switch enclosure including, on the inner bottom of the recess, a center contact and two peripheral contacts disposed equidistantly therefrom, and at least one outer contact outside the peripheral contacts; wherein said movable contact includes a disc segment with a spherically curved upper surface and a periphery disposed above the peripheral contacts with a predetermined gap therebetween, an outer ring segment that is concentrically joined with the disc segment by a flexible connecting segment with a fixed distance between the ring segment and the disc segment, the ring segment mounted on a step-shaped movable contact receptacle provided in the recess of the switch enclosure, and a projecting segment that protrudes outward from the ring segment, the projecting segment permanently connected with the outer contact.