Push switch

A push switch comprising:

• a case made of insulating resin and having a bottom face;
• a first fixed contact provided on the bottom face of the case;
• a second fixed contact provided on the bottom face of the case;
• a movable contact made of metal thin plate, including
• an annular outer periphery located on the first fixed contact, and
• a tongue extending from the outer periphery to a center of the annular portion, the tongue being located over the second fixed contact and facing the second fixed contact across a predetermined clearance between the tongue and the second fixed contact;
• an elastic body including
• a cylindrical portion having a hole formed therein, the cylindrical portion having a top surface, the hole opening to the top surface of the cylindrical portion, the hole having a bottom,
• a conical portion provided below the cylindrical portion, the conical portion being hollow to open downward, the conical portion having a lower end located on the outer periphery of the movable contact,
• a projection located above the tongue of the movable contact, the projection projecting from a center of the opening of the conical portion and under the bottom of the hole, and
• a junction portion coupling the projection to the cylindrical portion;
• and
• an operating body mounted on the top surface of the cylindrical portion of the elastic body, the operation body being movable upward and downward,
• wherein the conical portion, the junction portion and the operating body are configured such that when the operating body is moved downward during an operation stroke, the conical portion and the junction portion deform, and the conical portion deforms before the junction portion deforms.