Polygon mirror scanner motor and method of manufacturing the same
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United States of America Patent
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Feb 14, 2012
Grant Date -
Jan 7, 2010
app pub date -
Mar 28, 2007
filing date -
Nov 27, 2006
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Abstract
The rotor of this polygon mirror scanner motor is composed of a rotor magnet provided in the inner wall of a rotor frame, a rotor boss having a circular tube part and provided in the rotor frame, and a polygon mirror mounted on the rotor boss. The stator is composed of a stator core formed by laminating magnetic members and disposed oppositely to the rotor magnet, a stator coil wound in the stator core, and an iron plate circuit board having a through-hole. A dynamic pressure bearing is composed by forming a dynamic pressure groove in either one of the shaft fixed in the through-hole by laser welding, and the circular tube part of the rotor boss, and the circular tube part of the rotor boss is supported by the shaft.
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