| 摘要 |
PURPOSE:To facilitate the microminiaturization and thin formation of an element by a method wherein a sector notch with the central angle less than 180 deg. is provided on the upper surface of a drum core, a projection wherein a sector notch with the central angle less than 180 deg. is formed on the inner upper surface of a cup adjustment core, and the positional relation in circumferential direction between the drum core and the cup adjustment core is made variable. CONSTITUTION:The drum core 24 wherein a sector notch with the central angle 90 deg. is provided on the upper surface is fixed on a substrate 29 whereon terminals are fixed. A ring groove 298 is formed on the upper surface of the substrate 29, the cup adjustment core 23 is fitted in, and the circumference of the drum core 24 covered. By inserting a driver into a driver groove 28 and thus rotating the cup adjustment core 23, the notch 241 provided on the upper surface of the drum core 24 and the notch 231 provided on the projection 238 on the inner upper surface of the cup adjustment core 23 are relatively rotational-displaced. Thereby, the inductance adjustment is performed. It is desirable that the central angles of the sector notches 241, 231 are set less than 180 deg.. |
