| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotary knob, in which a key existing in the rotary knob stays horizontal when the rotary knob is rotated, and in which illumination is put on at the center of the key brought into contact when the key is operated. SOLUTION: A rotary knob constructed with hollow has a companion part electrically connected with an operation function of the device side, and a key- operation function to operate an operation part. The rotary knob 2 and a key 5 are supported by a supporter part 6 existing in the rotary knob 2, and by this supporter part, they are operated separately from each other.
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