Minebea Company, Limited

Minebea Mitsumi Inc.

Hiroichi Shibata

Taketoshi Ohyashiki

Yuzuru Suzuki

Hiroshi Sano

Sakae Fujitani

Kunitake Matsushita

Makoto Kinoshita

Naoyuki Harada

Hirohito Nakamata

A coil assembly in which a slack can be formed in a coil wire without increasing assembly cost, and a stepping motor using the same, are provided; the coil assembly includes a bobbinhaving flange portionsandat both ends thereof, multiple terminal pin embedding portionsarranged at one flange portion, a terminal pinembedded in the terminal pin embedding portion, and a coilof which an end portion of coil wireis entwined around the terminal pin, the coil wirewound around the bobbin, in which a concave portionwhich concaves to a radial direction of the bobbinand penetrates to an axial direction of the bobbinis formed between the terminal pin embedding portions, the coil wireexists from a base portion of the terminal pin, passes through the concave portion, started to be wound around the bobbin, and has a slack portionwhich exists in the concave portion

Coil assembly and stepping motor using same

A terminal of a motor is provided, in which a connection between a coil and an external circuit can be carried out securely and with a good workability, while saving material resources and enhancing safety relating to environmental pollution. A terminal ( ) consists integrally of a magnet wire binding section ( ) to connect to a magnet wire ( ) of a coil ( ), an external connection section ( ) to connect to an external circuit and a support base section ( ) to press-fit into a terminal block ( ) of a bobbin ( ) and hold the terminal ( ), and the magnet wire ( ) is plasma welded for connection through to the external connection section ( ) (terminal ). The connection of the terminal is carried out by welding (plasma welding), thus the end of the magnet wire of a motor ( ) is connected without using solder containing lead. As a result, since lead is not used, material resources can be saved and safety relating to the environmental pollution can be enhanced. Since the support base section ( ) press-fits into a hole of the terminal block ( ) of the bobbin ( ), a direction and position of the terminal ( ) are settled to thereby increase the stability.

Terminal structure of a motor

Growing community of inventors

Fukuroi, Japan

Hiroichi Shibata