| 摘要 |
PURPOSE:To obtain a small-sized air-core coil of low cost which can be automatically mounted on a printed board. CONSTITUTION:This air-core coil is constituted of an air-core part 2 formed by winding a self-welding magnet wire, and a coil retaining plate 4 having almost the same form as the air-core coil part 2 plane. At least a pair of coil lead terminal tying-up parts 5a, 5b are protruded from the periphery of the plate 4. At least one surface of the plate 4 is coated with an adhesive layer 6. A winding-start terminal 3a and a winding-end terminal 3b of the air-core coil part 2 are wound around the coil lead terminal tying-up parts 5a and 5b, respectively. Wire parts of the air-core part 2 are mutually fixed, and the air- core part 2 is fixed to the coil retaining plate 4 via the adhesive layer 6 of the coil retaining plate 4. |
