Turntable for spindle motor and spindle motor having the same
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United States of America Patent
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-
Jun 18, 2013
Grant Date -
Dec 1, 2011
app pub date -
May 31, 2011
filing date -
May 31, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A spindle motor having a turntable is disclosed, the spindle motor including: a bearing having a rotation hole; a bearing housing accommodating the bearing; a stator including a core secured at a periphery of the bearing housing and a coil wound on the core; a rotation shaft rotatably coupled to the bearing; a rotor coupled to the rotation shaft and including a magnet facing the core; a turntable body coupled to the rotation shaft and formed with a round groove at a bottom surface facing an upper surface accommodated by a disk; and a turntable including at least one ball accommodated in the round groove, where a rolling frictional coefficient between the turntable and the ball is in the range of 0.12˜0.16.
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