Mabuchi Motor Co., Ltd.

Toshiya Yuhi

Masahiko Kato

Takahiro Ohtake

Ryouichi Someya

Satoshi Kikuchi

Michio Hoshino

Masakazu Ikegami

Hideo Tamura

Takeshi Okumura

Takao Mitsumizo

Etsuo Mayumi

Hiroki Kouno

Toru Yano

Kouichi Koide

Minako Sakamaki

Isamu Serizawa

Yuuki Hirano

Takashi Ushiku

A gearbox includes: a gearbox main body made of resin that constitutes a part of a speed reducer to which a motor is mounted; and a terminal that conducts power supplied from an external source to the motor. The gearbox main body includes a through hole formed to correspond to a mold that is used to maintain a position of the terminal while the terminal is being integrated with the gearbox main body by insert molding. The through hole may function as a vent hole in the gearbox main body.

Gearbox, motor with speed reducer, and method for manufacturing gearbox

A miniature motor comprising a housing formed into a bottomed hollow tubular shape and having a permanent magnet fixedly fitted to the inner circumferential surface thereof, a rotor facing the permanent magnet and comprising an armature iron core having a coil wound thereon and a commutator, an end plate fitted to an open end of the housing and having brushes coming in sliding contact with the commutator and input terminals electrically connected to the brushes, and a cooling fan provided between the armature iron core of the rotor and the commutator; the rotor being rotatably supported by bearings provided on the bottom of the housing and the end plate, in which an integral cooling fan is formed by providing a plurality of fins at circumferentially equal intervals between first and second fan rings fitted to the ends of the commutator and the armature iron core, respectively, and a plurality of bosses are provided on the end face of the second fan ring.

Miniature motor

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.

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 including a case formed into a bottomed hollow tubular shape having a permanent magnet, an end cap fitted to an open end of the case, and a rotor having an armature iron core and a commutator. A sleeve made of a resin material and formed into a hollow cylindrical shape is fitted coaxially with the core constituting the armature iron core and the commutator, with a gap provided on at least one end face of the sleeve; a plurality of grooves facing at least an end face of the sleeve are provided on the iron core and the commutator at certain spacings in the circumferential direction; a projection for press-fitting to any one of the grooves is provided each on both end faces of the sleeve integrally with the sleeve; and a groove extending along the axial line of the sleeve is provided in the middle part of these projections.

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.

A commutator has such a construction that a flange having an outside diameter larger than the outside diameter of a cylindrical body is provided integrally with the cylindrical body in the vicinity of one end of the cylindrical body; guide grooves formed in a circular arc shape in cross section are provided on the flange at the boundary of the flange to the cylindrical body; engaging pieces passing through the guide grooves are provided on one end of a commutator segment; and engaging pieces are caused to deform plastically to fixedly fit the engaging pieces to the flange.

Miniature motor having a built-up commutator

A miniature motor in which female terminals are substantially embedded in an end cap, and brush arms and the female terminals are electrically connected to each other via internal terminals provided on the inside end face of the end cap; the female terminals are formed into a substantially h longitudinal section; contact ridges for making contact with male terminals to be connected are provided on both sides of the opposed inside surfaces of the female terminals in such a fashion as to protrude in a longitudinally staggered arrangement; the bifurcated ends of the female terminals face the outside end face of the end cap; and the area near both ends of the female terminal in the longitudinal direction is supported by the inside surface of a hole provided on the end cap.

Growing community of inventors

Chiba-ken, Japan

Toshiya Yuhi