| 摘要 |
PROBLEM TO BE SOLVED: To provide a reproduction device that can accurately detect whether an operation disk portion is touched with a finger and is reducible in cost as a reproduction device that can perform special reproduction by touching and rotating the operation disk portion with a finger.SOLUTION: A reproduction device includes an operation disk portion which has an electrode sheet portion pivoted rotatably to detect capacitance; a rotary shaft which is fixed to the operation disk portion and electrically connected to the electrode sheet; a bearing portion on which the rotary shaft is pivoted and which is electrically connected to the rotary shaft; and a touch determination portion which determines whether the operation disk portion is touched with a finger on the basis of change in capacitance value of the capacitance of the operation disk portion that the electrode sheet portion detects through the rotary shaft and the bearing portion. The electrode sheet portion includes a plurality of disk-like electrodes which each comprise a thin electrode pattern having electric conductivity on a reverse surface and form concentric types having their centers substantially in the center of the electrode sheet portion and differing in diameter. |
