Mitsumi Electric Company Ltd.

Yoshikatsu Iizuka

Shigeyoshi Odagiri

Mikito Baba

Norikatsu Shinba

Michio Nuka

Tugiaki Danmura

A miniature variable capacitor comprises a base plate having a base plate main part having stator support poles embedded in one surface of said base plate main part and mounting plate parts extending from said base plate main part in lateral directions and adapted to be fitted to a mount member different from said miniature variable capacitor, and a miniature variable capacitor main body comprising a rotor shaft rotatably supported at the center of said base plate main part, stator plate groups fixedly supported on said stator shafts, and rotor plate groups fixedly supported on said rotor shaft. The base plate further has bent parts bent in the direction in which said stator poles project and formed between said base plate main part and said mounting plate parts and integral therewith, whereby said mounting plate parts is not on the same level as said base plate main part but stepped in the stator support poles projecting direction from said base plate main part.

Miniature variable capacitor

A miniature variable capacitor comprises a stator plate group having a plurality of stator plates stationarily held in mutually spaced-apart state with specific spacing therebetween by spacers interposed between mutually adjacent plates, a rotor plate group having a plurality of rotor plates held integrally and rotatably in mutually spaced-apart state with specific spacing therebetween by spacers interposed between mutually adjacent rotor plates, and a thin film of a dielectric material is formed simultaneously and integrally on the entire exposed surface of all plates and spacers of at least one of the stator plate group and the rotor plate group. Furthermore, one or more elastic spacers are provided at plate supporting parts of at least one of the stator and rotor plate groups, and fine powder is distributed over the surfaces of all plates. At the time of production of the variable capacitor the dielectric material is formed in a thin film state on the entire plate group.

Growing community of inventors

Tama, Japan

Yoshikatsu Iizuka