Push button switch

A push button switch comprising

• a printed circuit board having two switch contacts thereon,
• a pair of conductors, corresponding to said switch contacts, adapted for movement in a direction into and out of contact with said switch contacts, said conductors being mounted on bottom surfaces of a corresponding pair of actuating supports, each of said actuating supports being movable in said direction within a tubular boss,
• a key top, rotatably mounted on a support shaft having its axis perpendicular to said direction, adapted for movement between a neutral position, wherein both of said conductors are out of contact with said switch contacts, and either a first position, wherein said key top causes one of said conductors to move in said direction to contact one of said switch contacts, or a second position, wherein said key top causes another of said conductors to move in said direction to contact another of said switch contacts,
• said supports having flared portions integral with peripheries of said bottom surfaces, said flared portions adapted to deform as said key top exerts pressure on said actuating supports,
• said switch satisfying the following relations:
• 0.3.ltoreq.d/a .ltoreq.0.7,4.ltoreq.d/t.ltoreq.6,1.0.ltoreq.d/h.ltoreq.1.4, 150.degree..ltoreq..theta..ltoreq.165.degree., 1.5.ltoreq.h.ltoreq.3 where t is the thickness of said flared portion, d is the length of said flared portion, a is an inner diameter of said flared portion, .theta. is an opening angle formed by an inner side surface of said flared portion and a top surface of said printed board, and h is the distance between a bottom surface of said conductor and the top surface of said printed board.