Nidec Corporation

Mitsuhito Nishio

Hiroyoshi Teshima

Takuya Yamane

Kiyoto Ida

Tomohiro Hasegawa

Takahiro Kikuichi

Hisakazu Motomochi

Shunji Matsumoto

Noriaki Yamada

Satoru Otsu

There is provided a blower fan including a motor. In its bearing apparatus, the inner circumferential surface of the rotor cylindrical portionand the outer circumferential surface of the bearing portion are arranged to together define a seal gap. The bushingincludes a bushing base portionand a bushing cylindrical portion. The inner circumferential surface of the bushing cylindrical portionand the outer circumferential surface of the rotor cylindrical portionare arranged to together define a vertical gap. The vertical gap is arranged to have a minimum radial width equal to or smaller than a maximum width of the seal gap. A lower end portion of the rotor raised portionand an upper end portion of the bushing cylindrical portionare arranged to together define a second horizontal gap

Blower fan

Inner circumferential surfaces of a rotor holder and a turntable are in contact with an outer circumferential surface of a shaft. This stabilizes coaxiality of both the rotor holder and the turntable with respect to the shaft. An upper cover portion of the rotor holder includes fixing holes. The turntable includes fixing projections arranged to extend through the fixing holes to be in contact with a lower surface of the upper cover portion. A base end portion of each fixing projection is arranged at a level higher than that of an upper end portion of a corresponding one of the fixing holes. Therefore, even if dimensional errors of the rotor holder and the turntable cause a radial displacement between any fixing projection and a corresponding one of the fixing holes, the rotor holder and the turntable can be fixed to each other while maintaining coaxiality therebetween.

Motor and disk drive apparatus

Growing community of inventors

Kyoto, Japan

Mitsuhito Nishio