PUSH-BUTTON SWITCH AND SHEET WITH CONTACT SPRING USED FOR CONSTRUCTION OF THE PUSH-BUTTON SWITCH

摘要

PROBLEM TO BE SOLVED: To provide a push-button switch capable of achieving guidance of light for illumination and thinness.;SOLUTION: The push-button switch is provided with an operating member 3 to be operated by pushing, an annular fixed contact 5 and a center fixed contact 6 installed on a substrate 4 opposed to this operating member 3, a contact spring 7 of dome shape which is arranged between an operating member 3 and the center fixed contact 6 and in which a movable contact 9 corresponding to the center fixed contact 6 is installed on the concave curved surface side of the crown part, and a light-emitting element 13 which is installed on the substrate 4 and becomes a light source of illumination of the push-button switch. A sheet member 10 is adhered on the convex curved surface side of the contact spring 7. This sheet member 10 fixes the contact spring 7 to the substrate 4 reversibly and restorably by being adhered to the substrate 4 on the outer periphery side of the contact spring 7. A plurality of projections 14 which guide the light emitted from the light-emitting element 13 in the direction of the operating member 3 are installed on the surface on the operating member 3 side of the sheet member 10.;COPYRIGHT: (C)2008,JPO&INPIT