| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a transformer which can be decreased in part and winding cost, improved in degree of coupling, and reduced in size, and to provide a power supply device equipped with the same, and an electronic device using the same. SOLUTION: A transformer is equipped with a bobbin 21, composed of a first cylinder 21a and a second cylinder 21b larger in diameter than that of the cylinder 21a which are formed concentrically in one piece through the intermediary of a gap 21g between them, a second winding 22 wound on the second cylinder 21b serving as an output winding that is of high voltage and carries a small current, and an air-core coil 24 formed of a first winding which is of low voltage and inserted into the gap 21g, to carry a large current. Therefore, the transformer can be decreased in part and winding cost, reduced in size, and improved in degree of coupling and performance.</p> |
