Patent ID: 8063326

Claim:
An illuminating structure of a key operating unit for operating a key switch, comprising: a housing unit to have a window portion formed correspondingly to the key switch; a circuit substrate to be provided inside the housing unit, to be disposed with the key switch, and to be provided with a light-guiding window portion; a keypad unit to include a plurality of key top portions inserted in the window portion of the housing unit, the keypad unit including a light-guiding portion at least in a plurality of the key top portions; a light-emitting element to be arranged on a back surface side of the circuit substrate; and an illuminating plate to have a reflecting portion, having a reflecting surface across a plurality of the key top portions, reflecting outgoing light of the light-emitting element by the reflecting surface to apply the reflected light from the reflecting portion to a plurality of the key top portions through the light-guiding window portion of the circuit substrate.