| 摘要 |
The present invention relates to a micro fan, including an impeller, a fan seat and a bottom cover plate, wherein the impeller has a shaft seat stationarily disposed at one end of a spindle and a plurality of blades extended from a periphery of the shaft seat, a top ring and a bottom ring are disposed on a top and a bottom ends of an outer rim of each blade, and a permanent magnet is disposed on a periphery of each blade and is positioned between the top and bottom rings. The impeller of the present invention requires only a single bearing to rotate the impeller therein, and thus there will be no concentricity alignment issue. Furthermore, an air inlet on the fan seat has no impediment at all and is subjected to no blockage, thereby not only increasing the air supply rate and smoothening the air flow field.
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