Ultra-small optical/magnetic head actuator with pivot hinge and Halbach magnet array
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United States of America Patent
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May 26, 2009
Grant Date -
Jun 8, 2006
app pub date -
Nov 9, 2005
filing date -
Dec 8, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An ultra-small optical/magnetic head actuator includes: a swing arm movable in a horizontal direction (tracking direction) and a vertical direction (focusing direction) and having mounted thereon a head for reading and writing information on a disk. A tracking actuator moves the swing arm in the horizontal direction (tracking direction) and a pivot hinge adjusts a radius of rotation of the swing arm and guides the movement of the swing arm in the tracking direction. A focusing actuator moves the swing arm in the vertical direction (focusing direction), wherein the focusing actuator includes a focusing coil attached under the swing arm and a Halbach magnet array disposed under the focusing coil minimizes thickness. Friction or backlash can be avoided, and non-repetitive errors can be reduced. The thickness of the ultra-small storage device can be reduced due to the use of a Halbach magnet array.
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