Mabuchi Motor Co., Ltd.

Masahiko Kato

Toshiya Yuhi

Takahiro Ohtake

Ryouichi Someya

Yusuke Miyajima

A cooling fan includes a fan ring to be attached to an end surface of a rotor core near the outer circumference thereof, and a plurality of fins connected to the fan ring. The fan ring has positioning leg portions provided on an end surface thereof facing a thrust direction. The fan ring is positioned in relation to the rotor core through insertion of the positioning leg portions into core slots of the rotor core. The fan ring has wire accommodation recesses which are formed on the end surface of the fan ring facing the thrust direction and communicate with the core slots.

Cooling fan built into rotor

A miniature motor comprising a case having a positive temperature coefficient resistor incorporated therein and a permanent magnet fixedly fitted thereto, a rotor comprising an armature and a commutator, and a case cap having a pair of power-feeding brushes and a pair of input terminals electrically connected to the brushes, in which a lanced and raised lug or lanced and raised projections are provided at the tip of a retaining member made of an electrically conductive material, a retaining part is formed by bending a part or the whole of the tip of the retaining member toward the side of the lanced and raised lug or lanced and raised projections, the size of a gap between a projection or a lanced and raised lug provided on any one surface of a pair of input terminals, and the retaining part in free state and the lanced and raised lug is made smaller than the thickness of the positive temperature coefficient resistor being inserted therebetween so that the positive temperature coefficient resistor can be inserted into the gap, and the lanced and raised lug or lanced and raised projection can cut into the surface of the electrode of the positive temperature coefficient resistor, resisting the movement of the positive temperature coefficient resistor in the extracting direction.

Miniature motor

A miniature motor comprising a case having a permanent magnet fixedly fitted to the inner circumference thereof, a rotor having an armature iron core and a commutator, and a case cap having power-feeding brushes and input terminals in which a pair of connecting members made of an electrically conductive material are provided on the inner end face of the case cap in a state insulated from brush holders, and a pair of terminals is integrally provided on each of the connecting members and the brush holders; one terminal of the connecting member being connected to the input terminal directly or via other electrically conductive members, the other terminal of the connecting member being connected to a pig-tail wire, and a capacitor being connected across the terminals.

A miniature motor includes a case made of metallic material and formed into a bottomed hollow cylindrical shape and having a permanent magnet fixedly fitted to the inner circumferential surface thereof. A rotor is provided with an armature and a commutator. A case cap is fitted to an open end of the case and has brushes making sliding contact with the commutator. Input terminals are electrically connected to the brushes directly or via other electrically conductive material. The rotor is rotatably supported by bearings provided on the case bottom and the case cap. Through holes formed into a T shape in cross-sectional profile are provided on the case cap made of a resin material. The input terminals each having a stopper on the lower end thereof and a lanced and raised piece on the central part thereof are passed in the through holes, the lanced and raised pieces are bent to almost right angles with the input terminal surface to fixedly fit the input terminals to the case cap.

Growing community of inventors

Chiba-ken, Japan

Masahiko Kato