To facilitate handling and eliminate the winding operation, by forming a primary coil by holding a winding conducting path formed by continuing a conductive layer in a wound state on the both or single side of an insulating loop-shaped thin film.
On an insulating loop-shaped thin film 71a, a conductive layer 72 composed of copper foil or the like is formed, and a winding conducting path 73a is formed of the conductive layer 72. The conductive layer 72 reaches the loop-shaped plane of the loop-shaped thin film 71a along one connecting arm part 74a, winds counterclockwise and is led out to the other plane side through a through hole 76a. Then, the conductive layer is wound on the loop- shaped plane from the other plane side, led out to one side via the through hole 76b at the base edge position of a connecting arm 74b and is extended to the edge of the connecting arm 74b. Thus, the loop-shaped thin film 71a holds the winding conducting path 73a of a 1.5 turn, on the front and the rear side from the edge of the connecting arm 74a to the edge of the connecting arm 74b, thereby, facilitating handling and eliminating the winding operation.
ITO TOSHIJI
SUGIMOTO NORIYASU
YASUDA MINORU
| JPS57125335A | 1982-08-04 | |||
| JP32001995A |