Abstract: A push button switch includes a push button positioned on a switch base; a biasing member positioned between the push button and the switch base; a switching element having a press portion, the switching element being provided at a position offset from an axis of the push button; a press projection and a rocking projection which are formed on the push button on opposite sides of the center thereof; and a fulcrum formed on the switch base to be associated with the rocking projection. The rocking projection and the fulcrum are disengaged from each other when the push button is in a non-depressed position. The rocking projection comes into contact with the fulcrum when the push button is half depressed. The push button turns about the fulcrum when the push button is further depressed following the half depression of the push button.

Abstract: A push button device for an electronic device includes an annular translucent member fixed to a body of the electronic device; a push button positioned in the annular translucent member to be capable of being depressed; a light emitter for illuminating the annular translucent member; a convex semi-cylindrical surface which is a portion of a complete cylindrical surface, and is positioned on a side of a space between the light emitter and the annular translucent member; and at least one photoreflective sheet adhered to the convex semi-cylindrical surface. An axis of the complete cylindrical surface extends in a direction substantially parallel to a direction along which the light emitter and the annular translucent member are aligned. A direction normal to a tangent plane to the convex semi-cylindrical surface extends toward the annular translucent member and the push button.

Abstract: A push button switch includes a push button positioned on a switch base; a biasing member positioned between the push button and the switch base; a switching element having a press portion, the switching element being provided at a position offset from an axis of the push button; a press projection and a rocking projection which are formed on the push button on opposite sides of the center thereof; and a fulcrum formed on the switch base to be associated with the rocking projection. The rocking projection and the fulcrum are disengaged from each other when the push button is in a non-depressed position. The rocking projection comes into contact with the fulcrum when the push button is half depressed. The push button turns about the fulcrum when the push button is further depressed following the half depression of the push button.

Abstract: A push button device for an electronic device includes an annular translucent member fixed to a body of the electronic device; a push button positioned in the annular translucent member to be capable of being depressed; a light emitter for illuminating the annular translucent member; a convex semi-cylindrical surface which is a portion of a complete cylindrical surface, and is positioned on a side of a space between the light emitter and the annular translucent member; and at least one photoreflective sheet adhered to the convex semi-cylindrical surface. An axis of the complete cylindrical surface extends in a direction substantially parallel to a direction along which the light emitter and the annular translucent member are aligned. A direction normal to a tangent plane to the convex semi-cylindrical surface extends toward the annular translucent member and the push button.