Push button switch device and sewing machine provided therewith

A sewing machine comprising:

• a sewing machine body;
• and
• a push button switch device provided on the sewing machine body and including:
• 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 plane which is provided on the rear surface of the push button member so that light from the light sources is incident thereon, the incidence plane including a concave curved surface that is located so as to substantially face the light sources and flat or convex curved surface that is located outside the concave curved surface and is continuous to the concave curved surface.