Nippon Seiki Co., Ltd.

Koichi Jinushi

Koichi Sato

Yoshihiro Kamimura

Masaru Iwahashi

Hiroyasu Numaya

Keiji Tsurumaki

Numaya Hiroyasu

Hitoshi Sato

Hiroyuki Matsuda

Provided is a coil instrument which can maintain a compact configuration even when a rotary shaft at a pointer side is subjected to a deceleration rotation by way of gears. The coil instrument includes a rotor shaft having a rotor magnet and a first gear, a pointer shaft having a second gear connected with the first gear, a housing which pivotally supports the pointer shaft and the rotor shaft in parallel, and a pair of coils which are arranged such that coils opposedly face an outer peripheral surface of the rotor magnet where the second gear is not arranged and give a rotational force to the rotor magnet upon energization thereof.

Coil-type meter

A stepping motor type indicator provided with unambiguous stable points having a holding force in a non-excited condition sufficient to suppress undesirable movements of a pointer. The stepping motor type indicator includes a stepping motor (,) having a rotor (,) with an output shaft (,) and stators (A, B). Yokes (,) have a plurality of pole teeth (,) extending toward curved outer surfaces of the rotor. The pole ends of a specific pole tooth (,) chosen from one of the plurality of pole teeth is made to have a pole end area different than that of the remaining pole teeth. This structure produces unambiguous stable points (&ldquo;a&rdquo;-&ldquo;l&rdquo;) and produces strong holding forces so that an attractive force exerted by the stable point (&ldquo;a&rdquo;) on the pointer (,) toward stopper pin (,) is increased to positively suppress undesirable movements of pointer (,).

Stepping motor type indicator having a pole tooth with reduced end area

Growing community of inventors

Niigata, Japan

Koichi Jinushi