Nidec Corporation

Makoto Fujihara

Takaya Otsuki

Yuji Yabuuchi

Hidenobu Takeshita

Takamasa Yamashita

Tomotsugu Sugiyama

Kazuhiro Inouchi

Masahiro Ishikawa

Naoto Yamaoka

Akira Saiga

In a brushless motor of the present invention, by disposing an electronic circuit board and a rotary magnet close to each other, detection precision of a magnetic pole of a Hall IC is enhanced, and a motor can be reduced in thickness. The electronic circuit boardis provided with an opening holeand a notch portionprovided on an outer peripheral side of the opening hole. A lower insulatorof a statoris provided with a positioning surfacewith respect to the electronic circuit boardand an arc projection piece. Portions of coil winding portions of teeth of the statorare fitted into the electronic circuit board, a surface of the electronic circuit boardis brought into positioning against an positioning surfaceof the lower insulator, and the notch portionof the electronic circuit boardand the arc projection pieceof the lower insulatorare engaged with each other.

Brushless motor having a circuit board having a central hole and escape holes

A motor includes a rotor and a stator. A shaft of the rotor is received in a sleeve. A face of the sleeve and a face of the shaft, that are opposed to each other, form a bearing supporting the rotor in a rotatable manner relative to the stator. A sleeve-retaining portion that retains the sleeve has a bottom portion opposed to an axial end of the sleeve. A magnet holder is arranged in the bottom portion to accommodate an attracting magnet magnetically attracting the axial end of the shaft. The magnet holder is held between the axial end of the sleeve and the bottom portion of the sleeve-retaining portion.

Motor

Impeller

Growing community of inventors

Kyoto, Japan

Makoto Fujihara