Push switch

A push switch comprising:

• a lower case made of insulating resin, the lower case having a recess provided therein, the recess of the lower case having a bottom;
• an inner fixed contact exposing from the bottom of the recess of the lower case;
• an outer fixed contact exposing from the bottom of the recess of the lower case;
• a movable contact accommodated in the recess, the movable contact being made of a metal plate having a dome shape, the dome shape having a concave surface, a convex surface opposite to the concave surface, and an outer peripheral end, the concave surface of the dome shape facing the inner fixed contact by a distance between the concave surface and the inner fixed contact, the outer peripheral end being placed on the outer fixed contact;
• an upper case attached to the lower case, the upper case having a through-hole located above the recess of the lower case;
• an elastic operation body for sealing the recess of the lower case, the elastic operation body having a lower surface, an upper surface opposite to the lower surface, and an outer edge, the lower surface of the elastic operation body contacting the convex surface of the movable contact, the outer edge held between the upper case and the lower case while being compressed, wherein the elastic operation body includes a flange section having the outer edge, and a tubular section protruding from the outer edge of the flange section towards the upper case, the tubular section having an inner circumference surface;
• and
• a push button provided on the upper surface of the elastic operation body, the push button being inserted into the through-hole of the upper case movably.