| 摘要 |
PROBLEM TO BE SOLVED: To prevent the deterioration of horizontal deflection sensitivity and vertical deflection sensitivity, efficiently restrain generation of an unnecessary radiation magnetic field, and prevent an enlargement of a shape and a cost increase by respectively setting dimensions of a horizontal deflection coil, a vertical deflection coil and a core installed in a cathode-ray tube to a range of a specific value. SOLUTION: A vertical deflection coil 3 is arranged on the inside surface side of a core 4, and a horizontal deflection coil 2 is arranged on its further inside surface side, respectively, and a deflection yoke 1 is constituted. A neck diameter is set toϕ(a diameter) 22 mm toϕ26 mm, and is applied to a cathode-ray tube whose deflection angle is 95 degrees to 110 degrees. On the tube axis direction when installed in this cathode-ray tube, a dimension (a) of the horizontal deflection coil 2 is set to 60 mm to 80 mm, and a dimension (b) of the vertical deflection coil 3 is set to 45 mm to 65 mm, and a dimension (c) of the core 4 is set to 25 mm to 45 mm. Distances (d and e) between the opening end of the core 4 and the respective opening ends of the horizontal deflection coil 2 and the vertical deflection coil 3 are set large to the possible maximum level.
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