| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a blower fan capable of easily correcting any unbalance, and causing less vibration even under the high-speed rotation. <P>SOLUTION: A motor 30 for rotating an impeller 20 has a rotor magnet 31 fixed to a shaft 10, and a stator 32 arranged oppositely to the rotor magnet 31, and is arranged below an impeller cup 21 in the axial direction. The stator 32 is fixed to the inner circumferential surface of a stator holding unit 40, and the opening side end 21a of the impeller cup 21 is arranged oppositely to the upper face 40b of the stator holding unit 40. The upper face 40b of the stator holding unit 40 has an expansion part 40b in which a distance between the upper face 40b and the opening side end 21a of the impeller cup 21 is larger than the distance at other portion of the upper face 40b of the stator holding unit 40 at least on a part opposite to the opening side end 21a of the impeller cup 21. <P>COPYRIGHT: (C)2012,JPO&INPIT |
