Spindle motor and data recording/reproducing apparatus with dynamic-pressure fluid bearing supporting shaft and ball bearing support rotor
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United States of America Patent
Stats
-
Oct 5, 2004
Grant Date -
Sep 5, 2002
app pub date -
Jan 31, 2002
filing date -
Feb 1, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spindle motor having a rotor R and a stator S. The stator S comprises a stator housing 80, a first bearing 82, a second bearing 84, a stator yoke 86, and a drive coil 88. The first bearing 82 is held in the stator housing 80 and supports a shaft 60, allowing the shaft 60 to rotate. The second bearing 84 provided between the stator housing 80 and a rotor housing 50, arranged concentric to the first bearing 82 in a radial direction, and supporting a rotor R, allowing the rotor R to rotate. The stator yoke 86 is formed integral with the stator housing 80, constituting a part of a housing 2 containing the rotor R and the stator S, and is made of magnetically permeable material. The drive coil 88 mounted on the stator yoke 86 and arranged in face-to-face relation with the drive magnet 58.
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