| 摘要 |
<p>A coil device 1 comprises two magnetic cores (2,3) each having U-shape in section forming a closed magnetic path therein with their legs being opposed to each other and having a gap (5) in such path, and a coil 4 wound so as to cover the gap. In this structure, the mutually opposed portions of the magnetic cores in the region to form the gap are so shaped that the cross-sectional area of the fore end becomes smaller than that of the base end, thereby preventing concentration of any leakage magnetic flux on the gap portions while averting abnormal generation of heat in the coil to consequently eliminate harmful influence of noise on peripheral apparatus or components. <IMAGE></p> |
