Mabuchi Motor Co., Ltd.

Akira Okazaki

Ikuo Matsushita

Takanobu Lee

Masao Take

Shinichi Matsuda

Hiroshi Minami

A miniature motor comprising a rotor having a plurality of magnetic poles extending axially, which is disposed radially on the outer circumferential surface of the rotor, and a stator having two coils wound on coil bobbins, which are disposed axially in a housing formed into a bottomed hollow cylindrical shape; an end plate being fitted to an open end of the housing, in which the housing is made of a ferromagnetic material, the magnetic poles are provided on a housing-side end face of the rotor so that an axial magnetic attraction force is exerted between the rotor end face and the housing.

Miniature motor with magnetized rotor end faces forming axial magnetic

A miniature motor is provided with a rotor having a plurality of magnetic poles extending axially, which are disposed radially on the outer circumferential surface thereof, and a stator having two coils wound on coil bobbins and disposed axially in a housing formed into a bottomed hollow cylindrical shape. An end plate is fitted to an open end of the housing, in which a current feeding connector is provided, and a printed circuit board having at board end prongs carrying bonding pieces for electrically connecting to the connectors is interposed between the coil bobbins. Coil ends are connected directly to the bonding pieces of the printed circuit board.

Miniature motor

A speed control device for d-c motors includes an IC control circuit having such a construction that a reference voltage is generated across two of its terminals C and D. Additionally, a current proportional to the armature current of the d-c motor is kept flowing in the terminal D at all times. A transistor is connected across the terminals C and D of the control circuit so that motor revolution can be changed linearly by means of a variable resistor connected in parallel across the base and collector of the transistor. With this arrangement, the revolution of d-c motors can be accurately controlled.

Growing community of inventors

Matsudo, Japan

Akira Okazaki