【図面の簡単な説明】[Brief explanation of the drawing]
第１図ａ，ｂ，ｃ，ｄは本考案のシヤドウマス
クの実施例を示し、第１図ａはシヤドウマスク全
体の平面図、第１図ｂは第１図ａ図示の位置０及
び＃１におけるシヤドウマスクの表側から見たス
ロツトの平面図、第１図ｃは第１図ａ図示の位置
＃２におけるシヤドウマスクの表側から見たスロ
ツトの平面図、第１図ｄは第１図ａ図示の位置＃
３におけるシヤドウマスクの表側から見たスロツ
トの平面図、第２図ａ，ｂ，ｃは第１図ａ図示の
位置＃２におけるシヤドウマスクのスロツトを示
し、第２図ａはシヤドウマスクの表側から見たス
ロツトの平面図、第２図ｂは第２図ａ図示のａ―
ａ′線に沿つて切断した断面図、第２図ｃは第２
図ａ図示のｂ―ｂ′線に沿つて切断した断面図、
第３図ａ，ｂ，ｃは第１図ａ図示の位置＃３にお
けるシヤドウマスクのスロツトを示し、第３図ａ
はシヤドウマスクの表側から見たスロツトの平面
図、第３図ｂは第３図ａ図示のａ―ａ′線に沿つ
て切断した断面図、第３図ｃは第３図ａ図示のｂ
―ｂ′線に沿つて切断した断面図、第４図はスロ
ツトの最小孔係部の形状の詳細を示す図、第５図
は従来のシヤドウマスクのスロツトの平面図、第
６図ａ，ｂ，ｃはビームの投射パターンを示し、
第６図ａはブラウン管中央部における投射パター
ンの平面図、第６図ｂはブラウン管左右における
投射パターンの平面図、第６図ｃはブラウン管四
隅における投射パターンの平面図、第６図ｄはブ
ラウン管上下における投射パターンの平面図であ
る。
１……最小孔径部、２……表孔、３……裏孔、
４……最小孔径部の突出部。
Figures 1a, b, c, and d show examples of the shadow mask of the present invention, Figure 1a is a plan view of the entire shadow mask, and Figure 1b is the shadow mask at positions 0 and #1 shown in Figure 1a. FIG. 1c is a plan view of the slot seen from the front side of the shadow mask at position #2 shown in FIG. 1a, and FIG. 1d is a plan view of the slot seen from the front side of the shadow mask at position #2 shown in FIG.
Figures 2a, b, and c show the slots of the shadow mask at position #2 shown in Figure 1a, and Figure 2a shows the slots seen from the front side of the shadow mask. The plan view of Figure 2b is the plan view of Figure 2a.
A sectional view taken along line a', Figure 2c is the second
A cross-sectional view taken along line bb' shown in Figure A,
Figures 3a, b, and c show the slot of the shadow mask at position #3 shown in Figure 1a;
is a plan view of the slot seen from the front side of the shadow mask, FIG. 3b is a sectional view taken along line a-a' shown in FIG. 3a, and FIG.
4 is a diagram showing the details of the shape of the minimum hole-related part of the slot, FIG. 5 is a plan view of the slot of a conventional shadow mask, and FIGS. 6 a, b, c indicates the beam projection pattern;
Fig. 6a is a plan view of the projection pattern at the center of the cathode ray tube, Fig. 6b is a plan view of the projection pattern on the left and right sides of the cathode ray tube, Fig. 6c is a plan view of the projection pattern at the four corners of the cathode ray tube, and Fig. 6d is a plan view of the projection pattern at the top and bottom of the cathode ray tube. FIG. 3 is a plan view of a projection pattern in FIG. 1... Minimum hole diameter part, 2... Front hole, 3... Back hole,
4... Projection of the smallest hole diameter part.