| 摘要 |
PURPOSE:To facilitate the accurate regulation of an inductance by trimming a magnetic unit wound with a winding or part of the unit. CONSTITUTION:A coil is wound on the outer periphery of a cylindrical drum 2 in a drum core 1 made of a magnetic material to form a winding unit 3. The both ends of the coil are connected by soldering with one ends of lead terminals 5, 5 at electrodes formed on the outside ends of collars 4, 4 of the core 1. Then, a magnetic unit 6 is formed by coating on part of the unit 3, the collar 4 of the core 1 is then trimmed to form a trimming part 7A to reduce the volume of the core 1 made of a magnetic material, thereby regulating the inductance. Thus, the fine regulation of the inductance can be simply and readily performed. |
