| 摘要 |
PURPOSE: A color cathode ray tube and a mask frame are provided, which are capable of maintaining torsional rigidity without increasing weight and of restraining deformation of a mask body. CONSTITUTION: A color cathode ray tube comprises a vacuum envelope including a panel having a major axis and a minor axis perpendicular to each other, a phosphor screen located on the inner surface of the panel, an electron gun assembly for emitting electron beams toward the phosphor screen, and a color sorting mechanism opposed to the phosphor screen. The color sorting mechanism includes a mask body, having a rectangular effective portion with a large number of electron beam holes, and a mask frame fixedly fitted with the mask body. The mask frame includes a sidewall portion, composed of a pair of long sidewalls(41a,41b) extending parallel to the major axis and opposed to each other, a pair of short sidewalls(41c,41d) extending parallel to the minor axis and opposed to each other, and corner sidewalls(41e-41h) between the long and short sidewalls, and a base portion extending from the sidewall portion toward a tube axis. The base portion includes substantially straight beads(44a-44d) located near the corner sidewalls and connecting the long and short sidewalls.
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