| 摘要 |
A head supporting arm coupled at one end with a head slider is supported so as it can revolve in parallel to the surface of a recording medium around a shaft for horizontal revolution, at the same time can revolve perpendicularly to the surface of recording medium around an axis for vertical revolution, which axis for vertical revolution being a straight line which contains the summit points of a pair of pivots. Further, voice coil unit is structured so as the center line of voice coil makes an angle theta to the center line of head supporting arm, and the center of gravity in centroid setting portion of the voice coil unit locates at a place which is at least in the direction anti-clockwise around the center of shaft for horizontal revolution with respect to the center line of head supporting arm. The above-configured head supporting gear provides such advantages as the downsizing of a disk drive, stabilized frequency characteristics, easier setting of load to the head at high accuracy level.
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