A7 B7 五、發明說明（2 ) 之著陸。 <請先閱讀背面之注意事項再填寫本頁) 但是，以往，因彩色影像管之陰罩係罩本體之大約全 周接觸於罩框之側壁部之構造，因此藉罩框之製造上之偏 差等而有不期望之力量施加於罩本體，對於面板有陰罩之 偏位之情形•尤其是，對近年來之長寬比爲16:9之彩 色影像管，與一般之彩色影像管相比較，因罩框之長邊側 之側壁部比短邊側之側壁部相比較大幅度地增長*而強度 之不足或對向長側壁部間之間隔（短軸方向之間隔）之參 差，故罩本體成爲容易變形。 又，在彩色影像管之製造過程中，重複實行陰罩之裝 卸作業，因在該卸除作業時施加於陰罩之力量，在罩框產 生撓曲而變形罩本體之情形。結果，產生對於3色螢光體 層之光束著陸之偏差。 經濟部智慧財產局貝工消費合作社印製 一方面，在對於3色螢光體層之光束著陸之餘裕度小 之多媒體對應的彩色影像管，爲了緩和因外部衝畫所產生 之陰罩的偏位，輕量化佔據陰罩之重量大部分的罩框，須 減輕對於彈性支持體之負擔。但是，若輕量化罩框時，則 施加於外部衝擊或陰罩之裝卸時之力量使罩框變形·，而陰 罩對於面板之位置成爲容易偏位。 又，將罩本體之厚度變薄，實行將螢光體螢幕之發生 不均勻之主要原因的電子束通過孔之尺寸，形狀成爲均勻 ’惟若將罩本體之厚度變薄，則會降低強度，導致罩本體 本身容易變形。 提供一種使用對於陰罩藉熱脹向螢光體螢幕方向鼓出 本紙張尺度適用中國國家標準（CNS)A4現格（21〇 X 297公釐〉 5 經濟部中央標準局負工消费合作社印— A7 —______Β7_五、發明説明（ι ) 〔發明之背景〕 本發明係關於一種陰罩型彩色影像管。 一般’彩色影像管係具有：在有效部之周邊部設有隔 電子外裙部之大約矩形的面板，及接合於隔電子外裙部之 漏斗狀漏斗所成的外圍器·在面板之有效部內面形成有3 色螢光體層所成的螢光體螢幕。又，對向於螢光體螢幕， 於其內側配設有陰罩。於漏斗之管頸內配設有放出3電子 束之電子槍。藉由裝設於漏斗外側之偏轉裝置所產生之磁 場偏轉從電子槍所放出的3電子束，經由陰罩，並藉水平 ，重直掃描螢光體螢幕顯示彩佐畫像。 陰罩係用以選別3電子束者，係由在與螢光體螢幕相 對向之部分形成有多數m子束通過孔之大約矩形狀的罩本 體，及具有接合於該罩本體周邊部之側壁部之大約矩形的 罩框所構成•作爲陰罩之支持方式，有於罩框之隅部安裝 大約楔形狀之覗苎令持體，藉將該彈件支持體去ft於設在 面板之陰電子外裙部之螺銷，支持成可裝卸者。 一般，在彩色影像管中，爲了將無色偏之畫像顯示於 螢光體螢幕，而須使通過罩本體之電子束通過孔的3電子 束，正確地著陸在3色螢光體層之各該層*爲了此，須將 陰罩保持在面板之正常位置。 然而，近年來1對應於多媒體，爲了提高解像度，提 供一種減小3色螢光體之大小及其排列節矩的彩色影像管 。在這種彩色影像管，因減小對於3色螢光體層之光束著 陸偏差之餘裕度，因此在一般之彩色影像管上被要求正確 本紙張尺度適用中國國家梯準（CNS ) A4规格（210X297公釐) " 1 請先亂讀背面之注意事項再(，.本頁) 裝· 訂 線 r -4 -A7 B7 Fifth, the description of the invention (2). < Please read the precautions on the back before filling in this page) However, in the past, because the shadow mask of the color image tube is in contact with the side wall of the mask frame for about the entire circumference, Unexpected forces are applied to the mask body due to deviations, etc., for the case where the panel has a shadow mask deviation. • Especially, for color image tubes with an aspect ratio of 16: 9 in recent years, it is similar to ordinary color image tubes. In comparison, since the side wall portion of the long side of the cover frame is greatly increased compared to the side wall portion of the short side *, and the strength is insufficient or the interval between the opposite long side wall portions (interval in the short axis direction) is uneven, The cover body becomes easily deformed. In the manufacturing process of the color image tube, the mounting and dismounting operations of the shadow mask are repeatedly performed, and the mask body is deformed due to the force applied to the shadow mask during the dismounting operation, which causes the mask frame to deform. As a result, a deviation occurs in the landing of the light beam of the three-color phosphor layer. Printed by the Shelley Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economy The lightweight mask frame that occupies most of the weight of the shadow mask must reduce the burden on the elastic support. However, when the mask frame is lightened, an external impact or a force applied to the mask during the removal and deformation of the mask frame deforms the mask frame, and the position of the mask with respect to the panel is easily shifted. In addition, the thickness of the cover body is reduced, and the size of the electron beam passing hole, which is the main cause of the unevenness of the phosphor screen, is implemented. The shape becomes uniform. However, if the thickness of the cover body is reduced, the strength will be reduced. As a result, the cover body itself is easily deformed. Provide a method for using a thermal mask to bulge the phosphor screen toward the phosphor screen. The paper size is applicable to the Chinese National Standard (CNS) A4 (21 × X 297 mm). 5 Central Standards Bureau of the Ministry of Economic Affairs. A7 —______ Β7_V. Description of the Invention (ι) [Background of the Invention] The present invention relates to a shadow mask type color image tube. Generally, the color image tube system includes: an electronic outer skirt is provided at the periphery of the effective part. An approximately rectangular panel and a peripheral device formed by a funnel-shaped funnel connected to the outer skirt of the electronics. A phosphor screen made of a three-color phosphor layer is formed on the inner surface of the effective part of the panel. The light body screen is equipped with a shadow mask on the inside. An electron gun emitting 3 electron beams is arranged in the neck of the funnel. The magnetic field generated by the deflection device installed on the outside of the funnel deflects the 3 emitted from the electron gun. The electron beam passes through the shadow mask and horizontally scans the phosphor screen to display the color image. The shadow mask is used to select 3 electron beams, and it is formed by a large number of m on the part facing the phosphor screen. Child beams pass An approximately rectangular cover body having a hole and an approximately rectangular cover frame having a side wall portion joined to a peripheral portion of the cover body. As a support method for a shadow mask, there is a wedge-shaped cover mounted on the lip portion of the cover frame. Order the holder to support the removable pin by removing the elastic support to the screw pin provided on the female outer skirt of the panel. Generally, in a color image tube, in order to display the image without color deviation, For phosphor screens, the 3 electron beams passing through the holes of the electron beam of the mask body must be correctly landed on each of the three-color phosphor layers. * To this end, the shadow mask must be kept in the normal position of the panel. In recent years, 1 corresponds to multimedia. In order to improve the resolution, a color image tube is provided to reduce the size of the three-color phosphors and their arrangement pitch. In this color image tube, the size of the three-color phosphor layers is reduced. The margin of the deviation of the beam landing, so it is required to be correct on general color image tubes. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) " 1 Please read the precautions on the back first (, .This page ) Binding & Threading r -4-
A7 B7 五、發明說明（8 ) 藉由正確地管理罩框3 0與罩本體2 7之接觸部間之間隔 ，亦即，藉由僅正確地管理dv，dS，可減低罩本體 (請先閱讀背面之注意事項再填寫本頁) 2 7之變形，而可有效地防止陰罩2 1對於面板3之偏位 。結果，可以減少光束著陸對於構成螢光體螢幕之3色螢 光體之偏位，而可顯示品味良好之畫像。 又，因凸部3 4之形成而強化罩框3 0，因此，可輕 量化罩框，可減輕對於彈性支持體1 5之負擔，又，即使 將罩本體2 7之厚度變薄，也可得到防止其變形等效果。 在上述之實施例中，罩框3 0之側壁2 8 L，係作成 具有楔狀凸部3 4及藉由該凸部所形成之間隙3 6之構成 。惟側壁2 8L，係僅其長度方向中央部及兩端部接觸於 罩本體27之形狀，凸部3 4及間隙3 6之形狀係需要可 作各種變更。 例如.，依照表示於第5 A圖之變形例，各凸部3 4係 形成大約矩形，間隙3 6係僅中央接合部3 2 a側之端部 3 6 a，形成從中央接合部3 2 a向端接合部3 2 b徐徐 地擴開寬度，而其他部分係形成一定寬度。 經濟部智慧財產局8工消费合作社印製 依照表示於第5 B圖之變形例，各凸部3 4係形成矩 形，而間隙3 6係在所有長度方向形成一定寬度》 又，依照表示於5 c圖之變形例，各凸部3 4及間隙 3 6，係形成與上述實施例相反方向的楔部》亦即，凸部 3 4及間隙3 6 ，係中央接合部3 2 a側之端形成最寬， 形成向端接合部3 2 b徐徐地變狹窄、 第6 A圖及第6 B圖，係表示本發明之第2實施例的 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -11 -A7 B7 V. Description of the invention (8) By correctly managing the interval between the contact portions of the cover frame 30 and the cover body 27, that is, by only correctly managing dv, dS, the cover body can be reduced (please first Read the precautions on the back and fill in this page) 2 7 deformation, which can effectively prevent the shadow mask 2 1 from deviating from the panel 3. As a result, it is possible to reduce the deviation of the beam landing from the three-color phosphors constituting the phosphor screen, and to display a good-quality image. In addition, since the cover frame 30 is strengthened by the formation of the convex portion 34, the cover frame can be reduced in weight, the burden on the elastic support 15 can be reduced, and the thickness of the cover body 27 can be reduced. Effects such as prevention of deformation are obtained. In the above-mentioned embodiment, the side wall 2 8 L of the cover frame 30 is configured to have a wedge-shaped convex portion 34 and a gap 36 formed by the convex portion. The shape of the side wall 28L is only the shape in which the central portion and both ends in the longitudinal direction contact the cover body 27, and the shapes of the convex portion 34 and the gap 36 need to be variously changed. For example, according to the modification shown in FIG. 5A, each convex portion 34 is formed into a substantially rectangular shape, and the gap 36 is formed only at the end portion 3 6a on the side of the central joint portion 3 2 a to form the central joint portion 3 2 a gradually widens the width toward the end joint 3 2 b, and the other portions are formed to a certain width. According to the modified example shown in Figure 5B, the Intellectual Property Bureau of the Ministry of Economic Affairs and the Industrial Cooperatives, each convex portion 34 is formed in a rectangle, and the gap 36 is formed in a certain width in all length directions. In the modification of the figure c, each convex portion 34 and the gap 36 are formed as wedge portions in the opposite direction to the above embodiment. That is, the convex portion 34 and the gap 3 6 are the ends on the side of the central joint portion 3 2 a. The widest shape is formed, and the end joints 3 2 b are gradually narrowed. Figs. 6A and 6B show the paper size of the second embodiment of the present invention to which the Chinese National Standard (CNS) A4 specification is applied ( 210 X 297 mm) -11-
A7 B7 五、發明說明（2 ) 之著陸。 <請先閱讀背面之注意事項再填寫本頁) 但是，以往，因彩色影像管之陰罩係罩本體之大約全 周接觸於罩框之側壁部之構造，因此藉罩框之製造上之偏 差等而有不期望之力量施加於罩本體，對於面板有陰罩之 偏位之情形•尤其是，對近年來之長寬比爲16:9之彩 色影像管，與一般之彩色影像管相比較，因罩框之長邊側 之側壁部比短邊側之側壁部相比較大幅度地增長*而強度 之不足或對向長側壁部間之間隔（短軸方向之間隔）之參 差，故罩本體成爲容易變形。 又，在彩色影像管之製造過程中，重複實行陰罩之裝 卸作業，因在該卸除作業時施加於陰罩之力量，在罩框產 生撓曲而變形罩本體之情形。結果，產生對於3色螢光體 層之光束著陸之偏差。 經濟部智慧財產局貝工消費合作社印製 一方面，在對於3色螢光體層之光束著陸之餘裕度小 之多媒體對應的彩色影像管，爲了緩和因外部衝畫所產生 之陰罩的偏位，輕量化佔據陰罩之重量大部分的罩框，須 減輕對於彈性支持體之負擔。但是，若輕量化罩框時，則 施加於外部衝擊或陰罩之裝卸時之力量使罩框變形·，而陰 罩對於面板之位置成爲容易偏位。 又，將罩本體之厚度變薄，實行將螢光體螢幕之發生 不均勻之主要原因的電子束通過孔之尺寸，形狀成爲均勻 ’惟若將罩本體之厚度變薄，則會降低強度，導致罩本體 本身容易變形。 提供一種使用對於陰罩藉熱脹向螢光體螢幕方向鼓出 本紙張尺度適用中國國家標準（CNS)A4現格（21〇 X 297公釐〉 5A7 B7 Fifth, the description of the invention (2). < Please read the precautions on the back before filling in this page) However, in the past, because the shadow mask of the color image tube is in contact with the side wall of the mask frame for about the entire circumference, Unexpected forces are applied to the mask body due to deviations, etc., for the case where the panel has a shadow mask deviation. • Especially, for color image tubes with an aspect ratio of 16: 9 in recent years, it is similar to ordinary color image tubes. In comparison, since the side wall portion of the long side of the cover frame is greatly increased compared to the side wall portion of the short side *, and the strength is insufficient or the interval between the opposite long side wall portions (interval in the short axis direction) is uneven, The cover body becomes easily deformed. In the manufacturing process of the color image tube, the mounting and dismounting operations of the shadow mask are repeatedly performed, and the mask body is deformed due to the force applied to the shadow mask during the dismounting operation, which causes the mask frame to deform. As a result, a deviation occurs in the landing of the light beam of the three-color phosphor layer. Printed by the Shelley Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economy The lightweight mask frame that occupies most of the weight of the shadow mask must reduce the burden on the elastic support. However, when the mask frame is lightened, an external impact or a force applied to the mask during the removal and deformation of the mask frame deforms the mask frame, and the position of the mask with respect to the panel is easily shifted. In addition, the thickness of the cover body is reduced, and the size of the electron beam passing hole, which is the main cause of the unevenness of the phosphor screen, is implemented. The shape becomes uniform. However, if the thickness of the cover body is reduced, the strength will be reduced. As a result, the cover body itself is easily deformed. Provide a use for the shadow mask to bulge toward the phosphor screen by thermal expansion This paper size applies Chinese National Standard (CNS) A4 (21 × X 297 mm) 5
五、發明說明（3 ) 之所謂穹面對於電子束之移動的抑制效果較大之因鋼（ invar )材料所成之低熱脹陰罩的彩色影像管。作爲這種 低熱脹陰罩之防止變形對策在日本特開平5— (請先閲讀背面之注意事項再填寫本頁) 1 2 1 0 0 9號公報，提供一種在罩框設置向外側突出之 複數凸部的陰罩。然而，即使在設置這種凸部時，因罩本 體與罩框之接點係面，也因罩框之製造上之偏差或在彩色 影像管之製造過程的罩框之變形，而產生罩本體之變形。 如上所述，欲在螢光體螢幕上欲顯示無偏色之畫像， 雖罩框之設計很重要，惟在以往之陰罩，因在罩本體或陰 罩上產生變形，而有無法顯示品味良好之畫像的問題。 〔發明之概要〕 本發明係爲了解決上述問題點而創作者，其目的係在 於提供一種有效果地抑制罩本體或罩框之變形，能顯示品 味良好之畫像的彩色影像管。 經濟部智慧財產局貝工消費合作社印樂 爲了達成上述目的，本發明之彩色影像管，其特徵爲 :具備於內面形成有螢光體螢幕之大約矩形狀有效部，與 具有設於上述面板周邊部之隔電子外裙部的面板，及接合 於上述隔電子外裙部之漏斗的外圍器；及具備在上述外圍 器內對向地設於上述螢光體螢幕的陰罩，及將上述陰罩彈 性地支持於上述隔電子外裙部的彈性支持體。 上述陰罩係具備：形成有多數電子束通過孔之大約矩 形的罩本體，及具有支持上述罩本體周緣部之4個側壁之 大約矩形框狀的罩框。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 6 A7 B7 經濟部中央標準為負工消费合作社印簟 五、發明説明（4 ) 上述側壁內之互相相對向之至少兩側壁係分別具備： 設於其側壁長度方向中央部且接合於上述罩本體的接合部 ’及沿著上述側壁長度方向設於上述接合部兩側且突出向 從上述罩本體離開之方向的一對凸部。各凸部係將間隙規 定在上述側壁與罩本體之間，而各間隙係包括隨著從上述 接合部離開，寬度徐徐地增大之部分。 又，依照本發明之彩色影像管，陰罩係具備：形成有 多數電子束通過孔之大約矩形的罩本體，及具有支持上述 罩本體周緣部之4個側壁之大約矩形框狀的罩框，上述側 壁內之長邊側的一對側壁係僅在·其長度方向中央部及長度 方向兩端部具有接合於上述罩本體之接合部。而除了上述 接合部之其他部分*係隔著間隙相對向於上述罩本體· 依照如上述所構成之彩色影像管，由於陰罩之罩框係. 亘有形#於側辟之凸部，因此，可提髙整體側壁及罩框之 機械強度，而可減低罩框之變形及起因於該變形的罩本體 之變形。由此，陰罩對於螢光髖螢幕之偏位可被抑制，而 可顯示良好之畫像。 又，由於在罩框之側壁與罩本體之間設置間隙，因此 ，可減低這些間之接觸面稹，而可減低罩框之尺寸之參差 ，或罩框之變形等給與罩本體之影響。 又，如上所述，適當化罩框之形狀或罩本體對於罩框 之固定，可減輕罩本體對於罩框之偏差，或因起因於罩框 之變形的罩本體之變形所產生的光束著陸之偏差· (請先閲·讀背面之注意事項再ic.本頁) •裝. 訂 線 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ~ 7 - A7 B7 經濟部中央標準局貝工消費合作社印裝 五、發明説明（5 ) 〔實施例之較佳形態〕 以下，一面參照圖式一面詳述本發明之實施例的彩色 影像管。 如第1、2圖所示’彩色影像管係具備玻璃所成之真 空外圍器1 0 *真空外圍器1 0係由具有大約矩形之有效 部1及設於有效部之周邊部之隔電子外裙部2的面板.3， 及接合於隔電子外裙部2之漏斗狀漏斗4所構成》在面板 3之有效部1內面，設有藍、綠、紅地發光之條紋狀3色 螢光體層20B，20G，20R及形成於此等螢光體層 間之條紋狀光遮蔽層2 5所成的，螢光體螢幕5。又，在真 空外圍器1 0內，相對向於蛋光體螢幕5配置有下述之陰 罩2 1 » 在漏斗4之管頸7內配設有放出3電子束8之電子槍 9。藉由裝設於漏斗4外側的偏轉裝置1 1所產生之磁場 偏轉從電子槍9所放出之3電子束8，經由陰罩2 1，藉 水平、垂直掃描螢光體螢幕來顯示彩色畫像。 如第1圖至第3 B圖所示，陰罩2 1係具備大約矩形 之罩本體2 7，及支持罩本體2 7之罩框3 0。罩本體 2 7係具有：與螢光體螢幕5同時形成有多數電子束通過 孔25之大約矩形的有效部27a ，及形成於有效部 2 7 a之周邊部的隔電子外裙部2 6。罩框3 0係具有長 邊側之一對側壁2 8 L及短邊側之一對側壁2 8 S而形成 大約矩形狀·罩本雔2 7係將該隔電子外裙部藉由焊接支 持於罩框3 0 · -a 一 (請先閲i#*背面之vir意事項再‘頁)V. Description of the invention (3) The so-called dome surface has a large suppression effect on the movement of the electron beam, which is a color image tube with a low thermal expansion shadow mask made of steel (invar) material. As a countermeasure for preventing deformation of such a low thermal expansion shadow mask, Japanese Patent Application Laid-Open No. Hei 5-(Please read the precautions on the back before filling in this page) Publication No. 1 2 1 0 0 9 provides a plurality of protrusions provided on the mask frame to protrude outward. The convex part of the shadow mask. However, even when such a convex portion is provided, the mask body is produced due to the manufacturing of the mask frame or the deformation of the mask frame during the manufacturing process of the color image tube due to the contact surface between the mask body and the mask frame. Of deformation. As mentioned above, if you want to display a colorless portrait on the phosphor screen, although the design of the mask frame is important, in the traditional shadow mask, the taste is not displayed due to the deformation of the mask body or the shadow mask. Problems with good portraits. [Summary of the Invention] The present invention was created by the present invention to solve the above-mentioned problems, and an object thereof is to provide a color video tube which effectively suppresses deformation of a cover body or a cover frame and can display a good-quality image. In order to achieve the above-mentioned object, the color image tube of the present invention includes the approximately rectangular-shaped effective portion formed with a phosphor screen on the inner surface of the color image tube of the present invention, and the panel provided with the panel. A panel with an electronic outer skirt part in the peripheral part, and a peripheral device connected to the funnel with the electronic outer skirt part; and a shadow mask provided in the peripheral device facing the phosphor screen, and The shadow mask is elastically supported by the elastic support body of the above-mentioned electron-shielding outer skirt. The shadow mask is provided with a substantially rectangular mask body having a large number of electron beam passing holes, and a mask frame having a substantially rectangular frame shape that supports four side walls of the peripheral portion of the mask body. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 6 A7 B7 The central standard of the Ministry of Economic Affairs is printed by the Consumers' Cooperatives. V. Description of the invention (4) At least two of the above-mentioned side walls facing each other The side walls are respectively provided with a pair of joint portions ′ provided at a central portion in the lengthwise direction of the side wall and joined to the cover body, and a pair of protrusions provided on both sides of the joint portion along the side wall lengthwise direction and protruding in a direction away from the cover body. Convex. Each convex portion defines a gap between the side wall and the cover body, and each gap includes a portion that gradually increases in width as it leaves the joint portion. In addition, according to the color video tube of the present invention, the shadow mask is provided with a substantially rectangular mask body having a plurality of electron beam passing holes, and a substantially rectangular mask frame having four side walls supporting the peripheral portion of the mask body, The pair of side walls on the long side of the side wall has a joint portion that is joined to the cover body only at a central portion in the longitudinal direction and both ends in the longitudinal direction. The other parts except the above-mentioned joints are opposed to the above-mentioned cover body through a gap. According to the color image tube constructed as described above, since the cover frame of the shadow mask is. 亘 有形 # 于 Projected part of the side, therefore, The mechanical strength of the entire side wall and the cover frame can be improved, and the deformation of the cover frame and the deformation of the cover body due to the deformation can be reduced. As a result, the deflection of the shadow mask on the fluorescent hip screen can be suppressed, and a good image can be displayed. In addition, since a gap is provided between the side wall of the cover frame and the cover body, the contact surface 稹 between these can be reduced, and the variation of the size of the cover frame or the deformation of the cover frame can affect the cover body. Further, as described above, the shape of the mask frame or the fixation of the mask body to the mask frame can reduce the deviation of the mask body from the mask frame or the beam landing caused by the deformation of the mask body due to the deformation of the mask frame. Deviation · (Please read · Read the precautions on the back before ic. This page) • Binding. Binding paper size applies to China National Standard (CNS) A4 specification (210X297 mm) ~ 7-A7 B7 Central Bureau of Standards, Ministry of Economic Affairs Printing by Shelley Consumer Cooperatives 5. Description of the invention (5) [Preferred embodiment of the embodiment] Hereinafter, the color image tube according to the embodiment of the present invention will be described in detail with reference to the drawings. As shown in Figures 1 and 2, 'The color image tube is equipped with a vacuum peripheral device 1 0 made of glass. * The vacuum peripheral device 10 is formed by an effective portion 1 having a substantially rectangular shape and an external electron barrier provided at the peripheral portion of the effective portion. The panel 3 of the skirt 2 and the funnel-shaped funnel 4 connected to the electronic outer skirt 2 are formed. On the inner surface of the effective portion 1 of the panel 3, a stripe-shaped three-color fluorescent light emitting blue, green, and red is provided. The phosphor screen 5 is a phosphor screen 20B, 20G, 20R and a stripe-shaped light shielding layer 25 formed between the phosphor layers. In the vacuum peripheral device 10, the following shadow mask 2 1 is arranged opposite to the egg white screen 5 »An electron gun 9 emitting 3 electron beams 8 is arranged in the neck 7 of the funnel 4. The 3 electron beams 8 emitted from the electron gun 9 are deflected by the magnetic field generated by the deflection device 11 installed outside the funnel 4, and the color screen is displayed by scanning the phosphor screen horizontally and vertically through the shadow mask 21. As shown in FIGS. 1 to 3B, the shadow mask 21 is provided with a substantially rectangular mask body 27 and a mask frame 30 that supports the mask body 27. The cover body 27 has an approximately rectangular effective portion 27a having a plurality of electron beam passing holes 25 formed at the same time as the phosphor screen 5, and an electron-shielding outer skirt portion 26 formed at a peripheral portion of the effective portion 27a. The cover frame 30 is formed into a substantially rectangular shape with one pair of side walls 2 8 L on the long side and one pair of side walls 2 8 S on the short side. The cover 2 雔 7 supports the insulating outer skirt by welding. On the hood frame 3 0 · -a (please read the vir meaning on the back of i # *, then the page)
本紙張尺度適用中國國家揉準（CNS ) A4規格（210X297公釐） ~ 8 - A7 B7 經濟部中央梯準局貝工消费合作社印輦 五、發明説明（6 ) 罩框3 0之側壁內，一對長邊側之側壁2 8 L，係僅 其長度方向中央部及長度方向兩端部接觸於罩本體2 7之 隔電子外裙部2 6之狀態下接合於罩本體，成爲具有與罩 本體2 7之隔電子外裙部2 6之部分的構造。 詳述則如第3 A，3 B，4圖所示，各側壁2 8 L係 分別形成有以罩框3 0之短軸V作爲中心左右相對稱地折 彎，於長度方向中央部及長度方向兩端部接觸於罩本體 2 7之隔電子外裙部2 6的中央接合部3 2 a及一對之端 接部32b。又，在中央接合部32a之兩側，形成有突 出向從罩本體2 7離開之方向的，楔狀凸部34*位於凸部 3 4之位置的一對側壁2 8 L間之間隔d，係形成比短軸 V上之側壁2 8 L間之間隔d v及短側側壁2 8 S近旁之 側壁28L間的間隔dS大* 罩本體2 7之隔電子外裙部2 6之內，長邊部分係在 接觸於對應之側壁2 8 L之中央接合部3 2 a及端接合部 3 2 b之狀態下位於罩框3 0之內側，並^定於中央 接合部3 2 a及端接合部3 2b·在蘼狀態下，#各侧壁 28L駔置本體27之間、，形成有分別藉由凸部3 4斤規 ....· ..... - f ---- 定的一對間障3 I，而位於中央接合部3 2 a之兩側*各 間隙3 6係形成從中央接合部3 2 a向端接合部3 2 b徐 徐地寬度擴開之楔狀· 各間隙3 6之最大寬度W係形成約1〜3mm，沿著 側壁2 8 L之長度方向的間隙3 6之長度L 1 ，係將短軸 V與側壁28S之間的距離作爲L時，形成L1=0· 7 請 先 閎 面 之 注— 項 再 h- 本 頁 裝 訂 線 ΐ纸張尺度適用中國國家梂準(CNS ) Α4«^· ( 210X297公釐） 經濟部中央標準局員工消費合作社印製 A7 B7 _五、發明説明（7 ) 〜0 . 9 L。 一方面，罩本體2 7之短邊側的隔電子外裙部2 6， 係在所有罩框3 0之短邊側側壁2 8 S之大約全長，接觸 於其內側，焊接固定於側壁2 8 S在適當複數部位。 如上所構成之陰罩2 1係如第1圖所示，將罩框3 0 之隅部所固定之大約楔形狀的彈性支持體1 5，藉分別卡 止於實設在面板3之隔電子外裙部2的螺銷1 6，而被支 持於面板3成爲可裝卸之狀態。又，在第1圖中，參照記 號2 2係表示安裝於陰罩2 1的內部磁場遮蔽體。 依照如上述所構成的彩色影，像管，由於在罩體3 η之 輒鐾么8 L形成凸部3 4，因此，可提高置抿9...Π之後械 強度》故對於施加於陰罩21之外力可以防止陰置之變形 ，有|果地可減低陰罩對於面板3之偏位。尤其是對於長 寬比爲1 6 : 9之彩色影像管，與一般之彩色影像管相比 較，因罩框之長邊側之側壁大幅度地較長，因此，藉強度 不足或對向之長邊側側壁間的間隔之參差使罩本體容易變 形，惟如上所述地因構造陰罩21，而可有效果地防止陰 罩之變形。 又，因在罩框3 0之側壁2 8 L形成凸部3 4，而在 罩本體2 7與側壁2 8 L之間形成有間隙3 6。如此\側 壁2 8 L係僅在中央接合部3 9。芬雔诧会部3 ? b接觸 於翬卞？*2 7，而罩框3 0駔置本體2 7夕焰傾面積與以 往者相比較可大幅度減低。結里，雜@垢3 0之製造上之 參差可減經施加於罩本鏵2 了々不期望^力量。尤其是， 本紙張尺度適用中國國家揉準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再k .4頁) 裝. 訂 線 -10 -This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) ~ 8-A7 B7 Printed by the Central Laboratories of the Ministry of Economic Affairs, Shellfish Consumer Cooperatives. 5. Description of the invention (6) Inside the side wall of the cover 30 A pair of long side walls 2 8 L are joined to the cover body only in a state in which the central portion in the longitudinal direction and both ends in the longitudinal direction are in contact with the electronic outer skirt portion 2 6 of the cover body 2 7 so as to be provided with the cover. The structure of the main body 27 and the part of the electronic outer skirt 26. For details, as shown in Figs. 3A, 3B, and 4, each side wall 2 8 L is formed with the short axis V of the cover frame 30 as the center and is symmetrically bent left and right in the center and length of the longitudinal direction. Both end portions in the direction are in contact with the central joint portion 3 2 a of the electronic outer skirt portion 26 of the cover body 27 and the pair of terminal connection portions 32 b. Further, on both sides of the central joint portion 32a, an interval d between a pair of side walls 2 8 L protruding in a direction away from the cover body 27 is formed, and a pair of side walls 2 8 L is located at the position of the convex portion 34. It is formed to be larger than the interval dv between the side walls 2 8 L on the short axis V and the short side wall 2 8 S near the side wall 28L. The distance dS is within the outer outer skirt 2 6 of the cover body 2 7 and the long side. The part is located inside the cover frame 30 in a state of being in contact with the central joint portion 3 2 a and the end joint portion 3 2 b of the corresponding side wall 2 8 L, and is determined at the central joint portion 3 2 a and the end joint portion. 3 2b. In the 蘼 state, #each side wall 28L is placed between the main bodies 27, and the protrusions are formed by the protrusions 34 kg .................-f ---- fixed A pair of barriers 3 I, located on both sides of the central joint 3 2 a * The gaps 3 6 form a wedge shape that widens gradually from the central joint 3 2 a to the end joint 3 2 b. Each gap The maximum width W of 36 is about 1 to 3 mm, and the length L 1 of the gap 36 along the length direction of the side wall 2 8 L is L. When the distance between the short axis V and the side wall 28S is L, L1 = 0 · 7 Please note: h- The binding line on this page, the paper size is applicable to China National Standards (CNS) Α4 «^ ((210X297 mm)) A7 B7 printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs _V. Invention Description (7) ~ 0. 9 L. On the one hand, the electronically-isolated outer skirt portion 26 on the short side of the cover body 27 is attached to the approximate full length of the short side wall 2 8 S of all the cover frames 30, contacts the inside, and is fixed to the side wall 2 8 by welding. S is in appropriate plural positions. The shadow mask 2 1 constituted as above is shown in FIG. 1. The wedge-shaped elastic support 15 fixed to the crotch portion of the mask frame 30 is locked to the spacers provided on the panel 3 respectively. The screw pins 16 of the outer skirt 2 are supported by the panel 3 in a removable state. In the first figure, reference numeral 2 2 indicates an internal magnetic field shielding body attached to the shadow mask 21. According to the color shadow structured as described above, the image tube has a convex portion 3 4 formed on the cover body 3 L of 8 η. Therefore, the mechanical strength can be increased after 9 ... Π. The external force of the mask 21 can prevent the deformation of the shade, and the bias of the shade to the panel 3 can be reduced. Especially for color image tubes with an aspect ratio of 16: 9, compared with general color image tubes, the side walls of the long sides of the mask frame are significantly longer, so the strength is insufficient or the length is opposite. The variation in the interval between the side walls makes the mask body easy to deform. However, by constructing the shadow mask 21 as described above, deformation of the shadow mask can be effectively prevented. In addition, since the convex portion 34 is formed on the side wall 2 8L of the cover frame 30, a gap 36 is formed between the cover body 27 and the side wall 2 8L. In this way, the side wall 2 8 L is only at the center joint 3 9. The Finnish club 3? B came in contact with 翚 卞? * 2 7, and the flame frame area of the cover frame 30 and the body 2 7 can be greatly reduced compared with the past. In conclusion, the variation in the manufacturing of the miscellaneous @ 垢 3 0 can be reduced by applying the force to the cover 铧 2, which is not expected. In particular, this paper size is applicable to the Chinese National Standard (CNS) A4 (210X297 mm) (please read the precautions on the back before p. 4). Binding. -10-
A7 B7 五、發明說明（8 ) 藉由正確地管理罩框3 0與罩本體2 7之接觸部間之間隔 ，亦即，藉由僅正確地管理dv，dS，可減低罩本體 (請先閱讀背面之注意事項再填寫本頁) 2 7之變形，而可有效地防止陰罩2 1對於面板3之偏位 。結果，可以減少光束著陸對於構成螢光體螢幕之3色螢 光體之偏位，而可顯示品味良好之畫像。 又，因凸部3 4之形成而強化罩框3 0，因此，可輕 量化罩框，可減輕對於彈性支持體1 5之負擔，又，即使 將罩本體2 7之厚度變薄，也可得到防止其變形等效果。 在上述之實施例中，罩框3 0之側壁2 8 L，係作成 具有楔狀凸部3 4及藉由該凸部所形成之間隙3 6之構成 。惟側壁2 8L，係僅其長度方向中央部及兩端部接觸於 罩本體27之形狀，凸部3 4及間隙3 6之形狀係需要可 作各種變更。 例如.，依照表示於第5 A圖之變形例，各凸部3 4係 形成大約矩形，間隙3 6係僅中央接合部3 2 a側之端部 3 6 a，形成從中央接合部3 2 a向端接合部3 2 b徐徐 地擴開寬度，而其他部分係形成一定寬度。 經濟部智慧財產局8工消费合作社印製 依照表示於第5 B圖之變形例，各凸部3 4係形成矩 形，而間隙3 6係在所有長度方向形成一定寬度》 又，依照表示於5 c圖之變形例，各凸部3 4及間隙 3 6，係形成與上述實施例相反方向的楔部》亦即，凸部 3 4及間隙3 6 ，係中央接合部3 2 a側之端形成最寬， 形成向端接合部3 2 b徐徐地變狹窄、 第6 A圖及第6 B圖，係表示本發明之第2實施例的 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -11 - A7 B7 經濟部中央梂準局負工消費合作社印製 五、發明説明（9 ) 彩色影像管之陰罩2 1 *依照第2實施例，在罩框3 0 ’ 除了長邊側之側壁2 8 L之外，還在短邊側壁2 8 S也形 成有一對凸部4 0 ·各側壁2 8 S，也僅該長度方向中央 部及長度方向兩端部接觸於罩本體2 7之隔電子外裙部 2 6之狀態下接合於罩本體，成爲具有與罩本體27之隔 電子部26未接觸之部分的構造· 亦即，各側壁2 8 S係以罩框3 0之長軸Η作爲中心 而左右對稱地折彎，在長度方向中央部及長度方向兩端部 分別形成有接觸於罩本體2 7之隔電子外裙部2 6的中央 接合部4 2 a及一對端接合部*2 b ·又，在中央接合部 4 2 a之兩側，形成有突出向從罩本體2 7離開方向之楔 狀凸部4 0 ·凸部4 0之位置的一對側壁2 8 S間之間隔 ，係形成比長軸Η上之側壁2 8 S間的間隔及長邊側之側 壁2 8 L近旁之側壁2 8 S間的間隔大。 罩本體2 7之隔電子外裙部2 6內，短邊部分係在接 觸於對應之側壁2 8 S之中央接合部4 2 a及端接合部 4 2 b之狀態下位於罩框3 0之內側，焊接固定於中央接 合部42 a及端接合部42b ·又，在各側壁28與罩本 體2 7之間，分別形成藉由凸部4 0所規定之一對間隙 44，位於中央接部42a之兩側•各間隙44係形成從 中央接合部4 2 a向端接合部4 2 b徐徐地變寬的楔狀。 其他之構成係與上述第1實施例相同。 依照如上述所構成之第2實施例，由於在短邊側之側 壁2 8 s也設置凸部4 0 ·因此可更提髙罩框3 0之機械 (請先閲'«背面<注意事項再^'本頁) -裝· 訂 線 本紙張尺度逋用中國國家橾準（CNS ) A4規格（210 X 297公釐） -12 - A7 B7 經濟部中央標準局貞工消费合作社印製 五、發明説明（10 ) 強度’同時更減低罩本體2 7與罩本體3 0之接觸面積。 故’可更減低罩本體2 7之變形•可有效地防止陰罩2 1 對於面板3之偏位。 第7 A ’ 7B圖係表示本發明之第3實施例的彩色影 像管之陰罩2 1。依照第3實施例，在覃框3 0之側壁 2 8 L及2 8 s分別形成有4個凸部3 4。亦即，在各側 壁2 8 L，以短軸V作爲中心，左右對稱地分別形成有兩 個凸部34 *側壁28L係除了中央接合部32a及端接 合部32b之外，還具有位於此等接合部32a，32b 間的中央接合部3 2c，經由此，等5個接合部焊接固定於 罩本體27之隔電子外裙部26。又，在側壁28L與隔 電子外裙部2 6之間，藉由凸部3 4形成有4個間隙3 6 ’各間隙係形成從中央接合部3 2 a側向端接合部3 2 b 徐徐地變寬之楔狀。 同樣地，在側壁2 8 s，以長軸Η作爲中心，左右對 稱地分別形成有兩個凸部4 0。側壁2 8 s係除了中央接 合部4 2 a及端接合部4 2 b之外，還具有位於此等接合 部42a，42b間的中間接合部42c，經由此等5個 接告部焊接固定於罩本體2 7之隔電子外裙部2 6。又， 在側壁2 8 s與隔電子外裙部2 6之間，藉由凹部4 0形 成有4個間隙3 6，各間隙係形成從中央接合部4 2 a側 向端接合部4 2 b徐徐地變寬之楔狀。 依照如上所述地所構成的第3實施例，藉形成凸部 34，4 0之形成可更強化罩框30，例如，即使外部衝 (請先閱t背面之ίΐ·意事項再^^冬頁) -裝· 訂 線 本紙張尺度適用中國國家梂準（CNS ) Α4規格（210X297公釐） 經濟部中央標準局貝工消费合作社印製 A7 B7 五、發明説明（11 ) 擊施加於陰罩時，隨著凸部數也可分散該衝動力。其他， 也可得到與上述第1及第2實施例同稱之作用效果。 第8 A，8B圖係表示本發明之第4實施例的彩色影 像管之陰罩。依照第4實施例。在罩框3 0之一對長邊側 的側壁2 8 L之中間部，對於短軸V左右對稱地取成一個 凸部3 4。凸部3 4係在所有長度方向全長形成一定寬度 。由此，凸部34之位置的一對側壁28L間之間隔d， 與短軸V上的側壁2 8 L間之間隔d v相等，而凸部3 4 之內面係形成曲率無限大之直線狀。 對於該罩框3 0，罩本體2, 7之長邊部，係將罩框 3 0之側壁2 8 L側形成作爲凸之圓孤狀。由此，側壁 2 8 L係對於罩本體2 7之長邊側隔電子外裙部2 6，僅 以位於凸部3 4之長度方向中央的中央接合部3 2 a及位 於凸部與側壁之境界的一對端接合部3 2 b接觸，而以此 等接合部焊接固定於隔電子外裙部。如此，在中央接合部 3 2 a之兩側，分別形成有向端接合部3 2 b徐徐地變寬 的楔狀間隙3 6。 又，在該陰罩2 1，罩本體2 7之短邊側的隔電子外 裙部2 6，係罩框3 0之短邊側的側壁2 8 s之大約全長 全面，接觸於其內側，以適當複數個之焊接點加以固定。 如上所述地所構成之第4實施例的陰罩21’也可得 到與上述之第1實施例同稱之作用效果。 〔圖式之簡單說明〕 (請先閲讀背面之νί意事項再\尽頁) -裝· 訂 線· 本紙張尺度適用中國國家揉準（CNS ) Α4规格（2丨0X297公釐} * 14 - 經濟部中央梂準局貝工消費合作社印製 A7 B7_五、發明説明（12 ) 第1圖至第4圖係表示本發明之第1實施例的彩色影 像管； 第1圖係表示上述彩色影像管的剖面圖， 第2圖係概略地表示上述彩色影像管之電子槍，陰罩 ，萤光體螢幕的斜視圖。 第3 A圖係表示上述陰罩的平面圚。 第3B圖係表示沿著第3A圖之I I I-B-I I I B的剖面圖· 第4圖係放大表示上述陰罩之側壁部的平面圆》 第5A圖至第5 C圖係表示，上述陰罩之側壁部之各不 同之變形例的平面圖* 第6 A圖係表示本發明之第2實施例之陰罩的平面圖 〇 第6B圖係表示沿著第6A圖之線VIB—VIB的 剖面圖。 第7 A圖係表示本發明之第3實施例之陰罩的平面圖 〇 第7 B圖係表示沿著第7A圖之線VI IB — V I I B的剖面圖。 第8 A圖係表示本發明之第4實施例之陰罩的平面圖 〇 第8B圖係表示沿著第8A圖之線VI I IB — V I I I B的剖面圓· t 0^1 (請先聞i背面之一'^意事項再填> •个頁) -裝· -線— r 本紙張尺度速用中國國家樑準（CNS ) A4规格（210X297公釐） -15 -A7 B7 V. Description of the invention (8) By correctly managing the interval between the contact portions of the cover frame 30 and the cover body 27, that is, by only correctly managing dv, dS, the cover body can be reduced (please first Read the precautions on the back and fill in this page) 2 7 deformation, which can effectively prevent the shadow mask 2 1 from deviating from the panel 3. As a result, it is possible to reduce the deviation of the beam landing from the three-color phosphors constituting the phosphor screen, and to display a good-quality image. In addition, since the cover frame 30 is strengthened by the formation of the convex portion 34, the cover frame can be reduced in weight, the burden on the elastic support 15 can be reduced, and the thickness of the cover body 27 can be reduced. Effects such as prevention of deformation are obtained. In the above-mentioned embodiment, the side wall 2 8 L of the cover frame 30 is configured to have a wedge-shaped convex portion 34 and a gap 36 formed by the convex portion. The shape of the side wall 28L is only the shape in which the central portion and both ends in the longitudinal direction contact the cover body 27, and the shapes of the convex portion 34 and the gap 36 need to be variously changed. For example, according to the modification shown in FIG. 5A, each convex portion 34 is formed into a substantially rectangular shape, and the gap 36 is formed only at the end portion 3 6a on the side of the central joint portion 3 2 a to form the central joint portion 3 2 a gradually widens the width toward the end joint 3 2 b, and the other portions are formed to a certain width. According to the modified example shown in Figure 5B, the Intellectual Property Bureau of the Ministry of Economic Affairs and the Industrial Cooperatives, each convex portion 34 is formed in a rectangle, and the gap 36 is formed in a certain width in all length directions. In the modification of the figure c, each convex portion 34 and the gap 36 are formed as wedge portions in the opposite direction to the above embodiment. That is, the convex portion 34 and the gap 3 6 are the ends on the side of the central joint portion 3 2 a. The widest shape is formed, and the end joints 3 2 b are gradually narrowed. Figs. 6A and 6B show the paper size of the second embodiment of the present invention to which the Chinese National Standard (CNS) A4 specification is applied ( (210 X 297 mm) -11-A7 B7 Printed by the Central Consumers' Bureau of the Ministry of Economic Affairs, Consumer Cooperative, Cooperative V. Description of the Invention (9) The shadow mask of the color image tube 2 1 * According to the second embodiment, in the mask frame 3 0 'In addition to the long side wall 2 8 L, a pair of convex portions 40 are also formed on the short side wall 2 8 S. Each side wall 2 8 S is also in contact with only the central portion in the longitudinal direction and both ends in the longitudinal direction. The cover body 27 is joined to the cover body in a state where the electronic outer skirt portion 26 is separated from the cover body 27, so as to have a partition from the cover body 27. Structure of the part not in contact with the electronic part 26, that is, each side wall 2 8 S is bent symmetrically about the long axis Η of the cover frame 30 as the center, and is formed at the central portion in the longitudinal direction and at both ends in the longitudinal direction. There are a central joint portion 4 2 a and a pair of end joint portions * 2 b which are in contact with the electronic outer skirt portion 2 6 of the cover body 2 7. Also, on both sides of the central joint portion 4 2 a, protrusions from the central joint portion 4 2 a are formed. The distance between the pair of side walls 2 8 S at the position of the wedge-shaped convex portion 40 in the direction of the cover body 2 7 and the convex portion 40 is formed to be longer than the interval between the side walls 2 8 S on the long axis 及 and the long side. The space between the side walls 2 8 L adjacent to the side wall 2 8 L is large. The short outer side of the cover body 2 7 inside the electronic outer skirt portion 2 6 is located in the cover frame 30 in a state of contacting the central joint portion 4 2 a and the end joint portion 4 2 b of the corresponding side wall 2 8 S. The inner side is welded and fixed to the central joint portion 42 a and the end joint portion 42 b. Also, a pair of gaps 44 defined by the convex portions 40 are formed between each of the side walls 28 and the cover body 27, and are located at the central joint portion. Both sides of 42a • Each of the gaps 44 is formed in a wedge shape that gradually widens from the central joint portion 4 2 a to the end joint portion 4 2 b. The other structures are the same as those of the first embodiment. According to the second embodiment configured as described above, since the convex portion 40 is also provided on the side wall 2 8 s of the short side side, the mechanism of the cover frame 30 can be further mentioned (please read '«Back < Precautions (Re- ^ this page)-The size of the binding and binding paper is in accordance with the Chinese National Standard (CNS) A4 (210 X 297 mm) -12-A7 B7 Printed by Zhengong Consumer Cooperative, Central Bureau of Standards, Ministry of Economic Affairs Description of the invention (10) The strength 'at the same time reduces the contact area between the cover body 27 and the cover body 30. Therefore, the deformation of the mask body 2 7 can be further reduced. • The deviation of the shadow mask 2 1 from the panel 3 can be effectively prevented. Fig. 7A'7B shows a shadow mask 21 of a color video tube according to a third embodiment of the present invention. According to the third embodiment, four convex portions 34 are formed on the side walls 2 8 L and 2 8 s of the Qin frame 30, respectively. In other words, two convex portions 34 are formed symmetrically on each side wall 28 L with the short axis V as the center. The side wall 28L includes the central joint portion 32 a and the end joint portion 32 b. The central joint portion 3 2c between the joint portions 32 a and 32 b is passed through, and the other five joint portions are welded and fixed to the electronic outer skirt portion 26 of the cover body 27. Further, four gaps 3 6 'are formed between the side wall 28L and the electron-shielding outer skirt portion 26 by the convex portion 34. Each of the gaps is formed from the central joint portion 3 2 a to the end joint portion 3 2 b. Ground wedge-shaped. Similarly, on the side wall 2 8 s, two convex portions 40 are formed symmetrically on the left and right with the long axis Η as the center. The side wall 2 8 s has, in addition to the central joint portion 4 2 a and the end joint portion 4 2 b, an intermediate joint portion 42c located between these joint portions 42a and 42b, and is fixedly welded to these five receiving portions via these five receiving portions. The cover body 2 7 is separated from the electronic outer skirt portion 2 6. Further, four gaps 3 6 are formed by the recessed portion 40 between the side wall 2 8 s and the electron-shielding outer skirt portion 26, and each gap is formed from the central joint portion 4 2 a to the end joint portion 4 2 b. Slowly widening wedges. According to the third embodiment configured as described above, by forming the convex portions 34, 40, the mask frame 30 can be further strengthened. For example, even if the outer frame is punched (please read the precautions on the back of the t first, then ^^ winter Page)-Binding and binding. The paper size is applicable to China National Standard (CNS) A4 (210X297mm). Printed by A7 B7, Shellfish Consumer Cooperative, Central Standards Bureau of the Ministry of Economic Affairs. 5. Description of the invention (11). In this case, the impulse can be dispersed with the number of convex portions. Other effects similar to those of the first and second embodiments can be obtained. Figures 8A and 8B show a shadow mask of a color video tube according to a fourth embodiment of the present invention. According to the fourth embodiment. In the middle portion of one of the pair of side walls 2 8 L of the cover frame 30, a convex portion 34 is formed symmetrically with respect to the short axis V. The convex portions 34 are formed in a certain width over the entire length. As a result, the interval d between the pair of side walls 28L at the position of the convex portion 34 is equal to the interval dv between the side walls 28 L on the short axis V, and the inner surface of the convex portion 3 4 is formed into a straight line with infinite curvature. . The long sides of the cover frame 30 and the cover bodies 2 and 7 are formed as convex convex solitary shapes on the side of the side wall 2 8 L of the cover frame 30. Therefore, the side wall 2 8 L is only the central joint portion 3 2 a located at the center of the longitudinal direction of the convex portion 34 and the electronic outer skirt portion 2 6 of the cover body 27, and the convex portion and the side wall. A pair of end joints 3 2 b in the realm are in contact with each other, and these joints are welded and fixed to the electron-shielding outer skirt. In this way, wedge-shaped gaps 36 which gradually widen toward the end joint portions 3 2 b are formed on both sides of the central joint portion 3 2 a. The shadow mask 21, the short-side side of the mask body 27, and the electronically-isolated outer skirt portion 26 are connected to the inner side of the short-side side wall 2 8 s of the mask frame 30 in full contact with each other. Fix it with a proper number of welding points. The shadow mask 21 'of the fourth embodiment configured as described above can also obtain the same effect as that of the first embodiment described above. 〔Simplified description of the drawing〕 (please read the νί Italian matter on the back first and then the last page)-binding · Thread · This paper size is applicable to China National Standards (CNS) Α4 size (2 丨 0X297 mm) * 14- Printed by the Central Bureau of Standards of the Ministry of Economic Affairs, Shellfish Consumer Cooperative Co., Ltd. A7 B7_V. Description of the Invention (12) Figures 1 to 4 show the color image tube of the first embodiment of the present invention; Figure 1 shows the above color A cross-sectional view of the video tube, FIG. 2 is a perspective view schematically showing an electron gun, a shadow mask, and a phosphor screen of the color video tube. FIG. 3A is a plan view of the shadow mask. FIG. The cross-section view of II IBI IIB in Figure 3A. Figure 4 is an enlarged plan circle of the side wall of the shadow mask. Figures 5A to 5 C show different deformations of the side wall of the shadow mask. Example Plan View * Figure 6A is a plan view showing a shadow mask of a second embodiment of the present invention. Figure 6B is a cross-sectional view taken along line VIB-VIB of Figure 6A. Figure 7A shows the present invention. Plan view of the shadow mask of the third embodiment. Figure 7B shows the line VI IB along Figure 7A. — A cross-sectional view of VIIB. FIG. 8A is a plan view showing a shadow mask of a fourth embodiment of the present invention. FIG. 8B is a cross-sectional circle VI I IB — VIIIB along the line of FIG. 8A. T 0 ^ 1 (Please read one of the "I" items on the back of the article, and then fill in the pages>) -Packing · -Line — r This paper size is quick to use China National Standard Liang (CNS) A4 (210X297 mm) -15-