Patent ID: 7078853

Claim:
A deflection apparatus for a cathode ray tube comprising: a horizontal deflection coil; a vertical deflection coil placed external to the horizontal deflection coil; an insulating member interposed between the horizontal deflection coil and the vertical deflection coil; and a core placed on the insulating member connected to the vertical deflection coil, wherein the horizontal deflection coil, the vertical deflection coil, the insulating member, and the core have at least one sectional structure proceeding perpendicular to a tube axis of the cathode ray tube, and wherein with any one of the horizontal and the vertical deflection coils, the at least one sectional structure is formed with a first arc corresponding to a horizontal axis X, a second arc corresponding to a vertical axis Y and a third arc corresponding to a diagonal axis between the horizontal and the vertical axes X and Y, the horizontal axis X and the vertical axis Y forming four quarter sides, and at least one of the first arc and the second arc is formed with a center located inside a quarter side adjacent to a quarter side in which the sectional structure formed by the at least one of the first and second arc is located.