| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a transformer usable in various kinds of electronic apparatus. SOLUTION: The transformer comprises a coil bobbin 2 having at least a first and second winding grooves 3, 4 and a primary and secondary windings 5, 6 wound in the first winding groove 3 of the coil bobbin 2, wherein a part 7 of the primary winding is wound in the second winding groove 4 reversely to the winding direction in the first winding groove 3.
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