Heat dissipation fan and stator thereof
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United States of America Patent
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Jul 7, 2015
Grant Date -
Dec 13, 2012
app pub date -
Oct 20, 2011
filing date -
Jun 8, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An exemplary heat dissipation fan includes a rotor and a stator. The rotor includes a hub, a central shaft extending down from a top end of the hub, the shaft having a free end far from the top end of the hub. A magnetic element attached to an inner periphery of the hub. The stator includes a stator core consisting layers of yokes, two insulation frames mounted at two opposite ends of the stator core and a coil wound around the insulation frames. An outer surface of the stator faces and is spaced from an inner surface of the magnetic element of the rotor with a clearance defined therebetween. A width of a bottom end of the clearance adjacent to the free end of the shaft being smaller than a width of a top end of the clearance.
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