| 摘要 |
PURPOSE:To widen the degree of freedom for impedance with the outside dia. of a bobbin retained small without impairing the degree of freedom for magnetic field in the Z-axis direction, by forming two rows of winding grooves at the periphery of a bobbin for vertical coil. CONSTITUTION:A horizontal coil bobbin part 15 to form a winding groove 14 for winding of horizontal coil and a vertical coil bobbin 18 having two winding grooves 16, 17 for winding of vertical coil are provided at the major dia. side of a yoke body 13. To the minor dia. side of the body 13 are connected a horizontal coil bobbin 20, which has a winding groove 19 for winding of horizontal coil, and a vertical coil bobbin 23 having two winding grooves 21, 22 for winding of vertical coil. A saddle-shaped core 24 is incorporated between the bobbins 18, 23. Accordingly the winding grooves 17, 22 can increase the number of turns if winding without enlarging the outside dia. of vertical coil bobbin and without prolonging in the Z-axis direction, that will widen the degree of freedom for impedance of the vertical coil.
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