Stator-fixed structure and driving unit
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United States of America Patent
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-
Jan 12, 2016
Grant Date -
Dec 26, 2013
app pub date -
Feb 21, 2012
filing date -
Mar 9, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A driving unit includes a stator, a housing including a tubular section to accommodate the stator, a cover coupled to the housing to block an upper opening of the tubular section, and a bent wire rod defined by a wire to press the stator against the tubular section, the bent wire rod being arranged between a top surface of the stator and a rear surface of the cover while being compressingly deformed along an axis of the stator. The bent wire rod has substantially annular shape with an opened portion when seen along the axis, and includes projections projecting upward along the axis and depressions projecting downward along the axis being arranged alternately and successively. An elastic force from the bent wire rod causes the stator to receive a downward force along the axis. The stator is pressed against the tubular section to hold the stator in the housing.
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