Deflection yoke for a color cathode ray tube

A deflection apparatus for a color cathode ray tube comprising:

• (a) a pair of horizontal deflection coils for producing a horizontal magnetic field having generally pin-cushion shape distortion,
• (b) a pair of vertical deflection coils for producing a vertical magnetic field having generally barrel shape distortion,
• (c) an insulation bobbin having a cone shape part which is to be disposed on narrower end part of a cone part of a cathode ray tube, said cone shape part holding said horizontal deflection coils and said vertical deflection coils thereon and having a tubular part wherein a neck part of said cathode ray tube is to be disposed, and
• (d) a pair of magnetic members for producing a pin-cushion-shaped auxiliary vertical deflection magnetic field by collecting respective leakages of said horizontal deflection magnetic flux and said vertical magnetic flux, wherein each of said pair of magnetic members has a substantially vertical principal plane part which faces a vertical principal plane part of the other one in symmetry to each other with regard to a vertical center plane which includes the axis of said color cathode ray tube, and has an upper rear side bar and a lower rear side bar which are substantially horizontally projected from an upper rear part and a lower rear part, respectively, of said principal plane part to the vicinity of the vertical center plane and are bent in a vicinity of an outer face of said tubular part to extend in the axial direction toward electron gun side along the outer face to produce an auxiliary vertical deflection magnetic field of pin-cushion transformation and has an upper front side bar and a lower front side bar which are substantially horizontally projected from an upper front part and a lower part, respectively, of said principal plane part to the vicinity of the vertical center plane to produce an auxiliary horizontal deflection magnetic field of pin-cushion transformation.