| 摘要 |
Provided are a transformer-type coil device, which is small and thin and has a high coupling degree of a primary coil and a secondary coil, and a transformer device wherein a plurality of pairs of the transformer-type coil devices are incorporated. The coil device (1) is composed of a first winding section (2) wherein a primary coil wire (5) and a secondary coil wire (6) are alternately arranged in a planar state and wound by bifilar winding; a second winding section (3) wherein a secondary coil wire (6) is wound by being arranged in a planar state in parallel to a flat plane formed by the first winding section; and a secondary coil connecting section (4) for connecting an inner diameter side coil wire section of the secondary coil wire of the first winding section with an inner diameter side coil wire section of the secondary coil wire of the secondary winding section. The transformer device (50) is constituted by incorporating a plurality of pairs of such transformer-type coil devices (1).
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