| 摘要 |
PURPOSE:To prevent a core from removing when an inductance is adjusted by providing a projection which is projected inside in the upper hole of the through hole of a coil bobbin. CONSTITUTION:A projection 11 which is projected inside is formed in the upper hole of the through hole 10 of a coil bobbin 9 formed integrally with the upper surface of a terminal board 8, on which a terminal 7 is implanted. A coil 12 is wound on the bobbin 9 to engaged a screw core 13 with the hole 10. According to this structure, the projection 11 becomes a stopper at the adjusting time to prevent it from removing, thereby improving the workability. |
