Mabuchi Motor Co., Ltd.

Mabushi Motor Co., Ltd.

Hitoshi Fujiwara

Takanobu Lee

Kunio Hiromasa

Kazuo Okada

Shotaro Hayakawa

Etuo Mayumi

A miniature motor having a metallic case with a printed circuit board installed therein. The printed circuit board has an electronic circuit, mounted thereon, for controlling the miniature motor. A lug portion is provided protruding from the edge of an open end of the metallic case. An engaging portion is provided for engaging the lug portion with an earth terminal of the printed circuit board. The earth terminal and the lug portion are electrically joined by means of soldering in a state the printed circuit board is fitted to the metallic case in such a manner as to engage the lug portion with the engaging portion.

Miniature motor

A miniature motor having installed motor components in a housing made of a metallic material and formed into a bottomed, hollow cylindrical shape with an opening at one end thereof; a cover made of a metallic material and formed into a plate shape being fixedly fitted to the opening, in which a plurality of minute ridges are provided on the outside circumferential surface of the cover, and the outside dimensions of the cover are made equal to, or slightly larger than, the inside dimensions of the housing opening so as to ensure a firm press-fit between the cover and the housing opening, thereby maintaining electrical contact between both.

A miniature motor using a rubber magnet for the permanent magnet for creating a field, in which a coating film is formed on the rubber magnet. The coating film is gas-impermeable, possibly of suitable synthetic resin, to prevent any harmful gas generated in the rubber magnet from escaping therefrom and damaging the contact surfaces of the motor.

Growing community of inventors

Matsudo, Japan

Hitoshi Fujiwara