Frame for color cathode-ray tube having two-stepped beads for improving impact and vibration character

摘要

The present invention relates to a frame for a color CRT having a square framework includes a plurality of beads for strengthening stiffness of the frame formed on the framework including corner portions in order to prevent distortion of the shadow mask. The beads formed on the corner portions are stepped beads having at least two steps. The present invention is capable of strengthening the stiffness of the frames, and increasing an impact character and a vibration character by improving shapes of the beads on the corner portions where stress is concentrated.