| 摘要 |
PROBLEM TO BE SOLVED: To provide a color cathode-ray tube that has a shadow mask for effectively reducing warp produced in the skirt part of the pressed shadow mask and preventing concentrated stress from being impressed on a perforated part in fitting the skirt part to a support frame. SOLUTION: In a color cathode-ray tube provided with a shadow mask composed of a perforated part 5U having a large number of electron beam passing holes, a non-perforated part 5N communicating with the perforated part 5U in the periphery of the perforated part 5U and a skirt part 5S vertically extended and bent from the edges of the non-perforated part 5N and in which the skirt part 5S is spot-welded to a support frame to fix it to the inside of a panel part, plural swelled parts 131-138, 141-1412 which extend throughout the entire peripheries of the longer sides and shorter sides of the shadow mask 5 in the height direction of the skirt part 5S are formed. Then, for each of the swelled parts 131-138, 141-1412, a depth P, width D, and distance L between the largest part of the depth and the edge part of the perforated part 5U are selected to be in the range of 0.2-1.0 mm, of 4.0-12.0 mm and not less than 4.5 mm, respectively.
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