Patent ID: 7109431

Claim:
A push-on switch comprising: a case including a base portion and a peripheral side wall projecting from said base portion generally in a first direction, so as to form a recess opening in said first direction, said case being formed of insulating resin; a plurality of electrically independent fixed contacts disposed on a surface of said base portion of said case that faces in said first direction, said fixed contacts including at least a first fixed contact and a second fixed contact; a dome-shaped movable contact supported on said surface of said base portion and having a first portion non-movably contacting said first fixed contact, and a second portion movably supported for movement toward said second fixed contact in a second direction opposite said first direction; an elastic body supported in said recess of said case, said elastic body including an engaging part having a pressing part facing in said second direction toward said second portion of said dome-shaped movable contact, said elastic body including a peripheral part supporting said elastic body with respect to said case, and said elastic body including a thin-walled part connecting between said peripheral part and said engaging part; and a cover mounted to said case and covering said recess of said case; wherein said engaging part of said elastic body further has a force-receiving portion arranged to receive a pressing force directed generally in said second direction; wherein said dome-shaped movable contact is arranged such that, in a normal, unpressed state, said second portion of said dome-shaped movable contact is spaced apart from said second fixed contact, and upon being pressed a given amount in said second direction, said second portion of said dome-shaped movable contact contacts said second fixed contact, so as to electrically connect said first and second fixed contacts; and wherein said thin-walled part of said elastic body includes a conical part that has a conical interior surface and a conical exterior surface and that, in a normal, unpressed state, extends from said engaging part of said elastic body generally in said second direction, and a horizontal part that, in a normal, unpressed state, connects between said conical part and said peripheral part in a direction generally perpendicular to said first and second directions, said elastic body being arranged so that, in a normal, unpressed state, said thin-walled part is unimpeded from allowing said engaging part to be movable in said first and second directions.