Mabuchi Motor Co., Ltd.

Masahiro Mifune

Ikuo Matsushita

Takanobu Lee

Masao Take

A miniature motor comprising a rotor having a plurality of axially extending magnetic poles disposed on the outer periphery thereof in the circumferential direction, and a stator having two axially disposed coils wound on coil bobbins, in which flanges whose outside diameter is larger than the outside diameter of hollow cylindrical coil cores are provided on both ends in the axial direction of the coil cores, the coil bobbins having on one of the flanges projections protruding toward the outside in the axial direction of the coil cores are disposed in such a manner that the projections are directed toward each other, and that the projection on one coil bobbin faces the coil core of the other coil bobbin.

Miniature motor with integrated stator coil end supports

A rotor for rotary electrical machinery comprising a permanent-magnet member made of a mixture having ferromagnetic material powder and a binder resin for chief ingredients, and a shaft, in which a recess whose projected contour on a plane orthogonally intersecting the axial line of the permanent-magnet member is of a non-circular shape is provided at least an end face of the permanent-magnet member, and a shaft is press-fit into a metallic bush fitted to the recess, thereby ensuring high coaxiality tolerance between the permanent-magnet member and the shaft, easy assembly and low manufacturing cost.

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Matsudo, Japan

Masahiro Mifune