| 摘要 |
PURPOSE:To lower the noise level of magnetic head by arranging a pair of driving coils provided corresponding to the moving route of magnetic head in deviating it to the rotating shaft side away from a circle that can be drawn with a distance between the farthest external surface from the center of the rotating shaft of the other plural driving coils and the center of the rotating shaft as a radius. CONSTITUTION:Plural driving coils 27 consist of a pair of driving coils 27a provided corresponding to and adjacent to the moving route of magnetic head 24 and the other plural driving coils 27 not corresponding to the moving route. Each of the other plural driving coils 27 is arranged at an equal distance from the center of a rotating shaft 17 of a rotor 16. A pair of driving coils 27a are arranged in deviating to the rotating shaft 17 side away from a circle drawn with a distance R as a radius which is between the farthest external surface 27f from the center of the rotating shaft 17 of the other plural driving coils 27 and the center of the driving shaft 17. |
