Patent ID: 8247722

Claim:
A push button switch device which is provided on an equipment body, comprising: a push button member which is disposed on a cover constituting an outer surface of the equipment body so as to be depressible, the push button member being configured to be light-transmissible and having an outer surface and a rear surface; a switching element provided behind the push button member so that an operation axis thereof substantially corresponds with a central axis of the push button member; a plurality of light sources which is disposed around the switching element to illuminate the outer surface of the push button member, the light sources being operated by the push button member; and an incidence surface which is provided on the rear surface of the push button member so that light from the light sources is incident thereon, the incidence surface including a concave curved surface that is located so as to substantially face the light sources and a convex curved surface that is located outside the concave curved surface and is continuous to the concave curved surface, wherein the push button member has a recess which is formed in a central rear surface so as to be located inside the incidence surface and a light scattering surface which is provided on an inner surface of the recess so as to scatter light.