| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the handling of a receiver in a dark place by making the receiver case and operating knob of plastic blended with a spontaneous luminescent material. SOLUTION: A part of the receiver case 10 is made of a plastic blended with a spontaneous luminescent material and at least a part of an operating knob 12 provided to the receiver case 10 is made of a plastic blended with a spontaneous luminescent material. Or only the operating knob is luminescent, only the receiver case is luminescent or only part of an operating knob support fixture is not luminescent in a shape of the operating knob such as a torus or a rectangular shape. |
