VIBRATING-TYPE MOTOR
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United States of America Patent
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Issued Date -
Aug 21, 2008
app pub date -
Feb 21, 2008
filing date -
Feb 21, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A vibrating-type motor is provided, in which a restoring force is reduced without reducing a thrust increasing effect by auxiliary magnets, thereby to reduce the size and expense of the motor while increasing efficiency. The vibrating-type motor includes a moving part having a main magnet and auxiliary magnets individually junctioned coaxially to two axial end portions of the main magnet, an exciting yoke including two leg portions opposed to the moving part through a gap and arranged coaxially with the moving part, an exciting coil wound on the exciting yoke for generating a magnetic flux in the leg portions, and a back yoke arranged to confront the exciting yoke with the moving part located between the back yoke and the exciting yoke, wherein outer-side end portions of the exciting yoke extend past axial end portions of the back yoke.
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