Electromagnetic transducer

Patent

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Details

179114R, 179117, H04R 902

Patent

active

043862446

ABSTRACT:
An electromagnetic transducer in which one end of a coil terminal is connected with a step portion of a magnetic core body made of soft magnetic material such as pure iron and the other end of which is connected with a step portion of a supporting frame made of metal on the same plane by spot welding. An insulation between the supporting frame and the magnetic core body is made by interposing an insulator therebetween or by coating the surface of the magnetic core body with a resin film by evaporation.
By treating the coil terminals on the same plane, the expensive substrate for making an electrical connection is not needed and the assembly cost is extremely reduced.

REFERENCES:
patent: 2220942 (1940-11-01), Morrison
patent: 2249158 (1941-07-01), Morrison
patent: 2754373 (1956-07-01), Shaper
patent: 3515818 (1970-06-01), Tibbetts
patent: 3542974 (1970-11-01), Blastic
patent: 3593217 (1971-07-01), Weber
patent: 4314221 (1982-02-01), Satou

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