Motor and method of manufacturing the same
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United States of America Patent
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Feb 6, 2007
Grant Date -
May 18, 2006
app pub date -
Mar 26, 2003
filing date -
Mar 26, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A motor in which drive coils are arranged in an axial direction of a cylindrical rotor magnet of which an outer peripheral surface is magnetized, the drive coils are cylindrical bodies having respectively center holes into which a rotor shaft is to be inserted, curling cases each of which is formed by bending a flat plate made of a magnetic material into a tubular shape, surround the drive coils, respectively, and surround a cylindrical surface of the rotor magnet with a predetermined gap therebetween, and portions of the surfaces of the curling cases, which face the drive coils associated therewith, serve as yoke parts, respectively, while other portions of the curling cases, which face the rotor magnet, are formed to be pole teeth, and also serve as yoke plates.
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