| 摘要 |
PURPOSE:To obtain accurate and easy fine adjustment of inductance without changing an inductance pattern by changing relative position between the 1st printed circuit board on which the inductance pattern is formed and the 2nd printed circuit board which has a terminal in contact with the inductance pattern. CONSTITUTION:A circinate pattern 2 is formed on one layer of double-layer printed circuit board and a round hole is provided at the center 3 of the circinate pattern 2. The center 3 of the circinate pattern 2 is matched to a round hole 5 and fixed with a bis and a nut. A cylindrical tube 9 is incerted between two layers to keep the distance between two layers at a prescribed length and keep electrical contact of the circinate pattern 2 with a terminal 6 in goodcondition. In this arrangement, the relative position of the terminal 6 against the round hole 5 is so determined that the terminal 6 gets contact with the outermost part of the circinate pattern 2. Thus, by rotating the circinate pattern 2 around the round hole 5 the terminal 6 moves on the outermost part of the circinate pattern 2 getting contact with it so that the fine adjustment of inductance is realized. |
