| 摘要 |
A primary coil (L1) fixedly provided between a magnetic body (6) and a cover (7) has the same quadrangular cross-section as the magnetic body (6) and the cover (7). The primary coil (L1) having the quadrangular cross-section is wound from the magnetic body (6) toward the upper-side cover (7), and the central axis of the coil is upwardly increasingly biased in the horizontal direction. The central axis of the primary coil (L1) is biased in the direction of the diagonal line of the cross-section of the coil. |
