| 摘要 |
PURPOSE:To obtain a precise magnetic field distribution with excellent reproducibility by forming a uniform magnetic field at a neck of a horizontal deflection winding, forming a pin cushion magnetic field to an opening easily and decreasing the dispersion of the winding distribution for each deflection coil. CONSTITUTION:The invention improves the deflection coil comprising a trumpet shaped insulator 3 in which plural guide grooves 9 separated plural projection separators in the inner face are provided almost along a guide axis direction, a ferrite core yoke arranged to the outside, a horizontal or vertical deflection winding contained in the guide grooves 9 of the trumpet insulator 3, and a vertical or horizontal deflection winding 4 arranged along the inner face of the ferrite core yoke, at least parts of the projection separators forming the guide grooves 9 of the insulator 3 are arranged with a gap inbetween while being divided to a neck side and a face side, the winding contained in the guide grooves 9 of the insulator 3 is extended from the contained grooves of the neck side toward the face side along the guide axis direction and also extended up to the face side through the gap through the outer guide grooves 9 when viewing the center of the coil as features. |
