| 摘要 |
PURPOSE:To realize a mass production easily of deflecting yokes to accomplish an adequate deflection, by controlling generation of leaked magnetic flux when a toroidal type coil is used, by means of an auxiliary coil arranged outside the core. CONSTITUTION:Outside a core 1 is furnished an auxiliary coil 12, which consists of a pair of coils 12a and 12b arranged symmetrically and striding both toroidal coils 10a and 10b. The coil 12a is wound around from a terminal S the arrow shape portion 22a along an end of the core 1 the outer portion 20c along the outer side of the core 1, then closely along a portion 22c parallel to the 20c the outer portion 20c of a coil 10a, and then closely along a portion 22d parallel to the 20c, being repeated in such a way. Therefore, the leaked magnetic flux is controlled, its bad influence to the surrounding electromagnetic units is avoided, and any bad influence while receiving the effective magnetic flux from this device is prevented. A mass production of such deflecting yokes that accomplish an adequate deflection can be easily performed. |
