| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a configuration in which a static electricity charged in a user is avoided from being discharged to a component mounted on a circuit board through a rotary operation member, without causing degradation in detection precision of an operation state of the rotary operation member, with reduction in cost and size of an electronic apparatus being promoted. <P>SOLUTION: The electronic apparatus includes: an electrode member 30 which is coaxially fixed to the rear surface side of a rotary operation member that is supported by the apparatus body for rotary operation, with a plurality of protruding part 32 which protrude radially provided in circumferential direction; a circuit board 40, being arranged to face the electrode member 30 in non-contact manner in axial direction, in which a plurality of detecting electrode 42 positioned to correspond to the protruding part 32 are provided in the rotational direction of the rotary operation member at constant intervals, and a reference electrode 44 is provided in circumferential direction on the inner peripheral side of the detecting electrode 42; and detecting means 45 which detects change in electrostatic capacitance that occurs between the protruding part 32 and the detecting electrode 42 when the rotary operation member is rotated. A cut 34 through which a part of the reference electrode 44 is exposed is formed at the electrode member 30 and an edge of the cut part 34 is arranged close to the reference electrode 44. <P>COPYRIGHT: (C)2013,JPO&INPIT |
