4 6 49 0 5 經濟部智慧財產局員工消費合作社印製 ' Α7 Β7 五、發明說明（） 本發明係關於使陰極射線管之電子光束偏轉之一種系 統’亦稱之爲偏轉器（拆流板），尤其係關於該裝置可確保 偏轉線圈·之兩支撑’系統之機械剛性，在陰極射線管頸部 上偏轉器之定位與固定。 此種偏轉系統一般包括—對垂直偏轉線圈，—對水平偏 轉線圈及一由磁性材料所構成之實質上平截頭圓錐形環用 以集中由線圈所產生之磁通量。此兩對偏轉線圈電氣上係 由一般由塑膠製'成之隔離器予以絕緣，其中更可使其可能 改進偏轉裝置之機械剛性，以使線圏彼此相互固定及使组 合件裝配至陰極射線管之頸部。隔離器包括一主組合體， 成一個或更多部分，實質上成漏斗形狀，與一可撓性後面 部分靠近陰極射線管頸部且用以沿該管之縱軸固定偏轉系 統之位置。此固定作用一般係藉配置在撓性後面部分上面 之符位頸圈完成。 按兩步驟可執行陰極管頸部上偏轉器之調整； 首先沿陰極管縱軸調整偏轉器，按此種方式以便設定水 平及垂直偏轉線圈之中心在位。 其次藉繞水平及/或垂直軸旋轉或“傾斜，，此前面部分而 定位偏轉器之前面部分，按此種方式以便使水平及垂直偏 轉磁場軸緣與陰極管之縱向軸線相符。 .在陰極射線管螢幕之水平掃描中，欲改良在螢幕上所形 成影像之陰暗部分與明亮部分間之變化，已知辦法是使用 一對輔助線圈，即所謂水平掃描率調變線圈；此等線圈可 疊置在由主線圈所產生水平偏轉磁場上之一輔助磁場，按 -4- 本紙張尺度適用中國园家標準（CNS)A4規格（加χ撕公复丁 (請先閱讀背面之注意事項再填寫本頁} -裳-----li訂---------線一 464905 Λ7 2 五、發明說明（ 此種方式以便預期大量變更發光信號且因此而修改水平掃 描率。此外已知辦法有利地配置此等輔助線圏在陰極管之 頸部上’偏轉系統之水平偏轉線圈有時會使其部分或全部 重疊。亦有已知辦法藉侵蝕作用使此等輔助線圈以剛性式 撓性環ίΕ6方式置於一支撑上，在歐洲專利申請案 484,606内可説明此種裝置之範例。 當爲調變電子光束掃描率安裝包括輔助線圈之一偏轉系 統在陰極管頸郅時，必須調整輔助相對於水平偏轉線圏之 位置以便使其對電子光束之效果更佳。 爲簡化調整偏轉系統在陰極管頸部上之程序，有可能加 長隔離器之實質圓柱形後面部分以便因此而配置輔助線圈 應事先執行其相對於偏轉線圈之定位。 爲增加輔助線圈之效果，必須將線圈放置儘可能靠近電 予光束，此意示，若其係由隔離器之後面部份支撑，該部 分之切面係儘可能小。 但，隔離器之實質上圓柱形後面部分具有最低厚度之橫 向切面以便讓隔離器注入塑膠在鑄模内以簡單方式製成，' 在組成件製造中厚度大小非保證鑄模之正確灌充。 而且，實質上圓柱形後面部份之内部表面必須讓前面部 份之斜傾斜運動’因此防止該内部表面發生儘可能靠近陰 極管表面’且迫使在隔離器内部表面與陰極管頸; 間隙。 上述之兩種機械限制一般係當製造組成件時所應考量 者，依先則技藝偏轉系統包括在隔離器後面部分之周邊上 (請先閱讀背面之注意事項再填寫本頁) —--------訂---------線 0- 經濟部々慧財產局員工消費合作社印製 -5-4 6 49 0 5 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Α7 Β7 V. Description of the Invention () The present invention is a system for deflecting the electron beam of a cathode ray tube. ), In particular, the device can ensure the mechanical rigidity of the two support 'system of the deflection coil and the positioning and fixing of the deflector on the neck of the cathode ray tube. Such deflection systems generally include-for a vertical deflection coil,-for a horizontal deflection coil, and a substantially frustum conical ring made of magnetic material to concentrate the magnetic flux generated by the coil. These two pairs of deflection coils are electrically insulated by an isolator generally made of plastic. Among them, it is possible to improve the mechanical rigidity of the deflection device so that the coils are fixed to each other and the assembly is assembled to the cathode ray tube. Neck. The isolator includes a main assembly in one or more portions, substantially in the shape of a funnel, and a flexible rear portion near the neck of the cathode ray tube and used to fix the position of the deflection system along the longitudinal axis of the tube. This fixation is usually accomplished by a collar that is placed above the flexible rear section. Adjust the deflector on the neck of the cathode tube in two steps; first adjust the deflector along the longitudinal axis of the cathode tube, in this way to set the horizontal and vertical deflection coil center in place. Secondly, by rotating or "tilting" about the horizontal and / or vertical axis, this front part locates the front part of the deflector in this way so that the horizontal and vertical deflection magnetic field axis edges coincide with the longitudinal axis of the cathode tube. In the horizontal scanning of the tube screen, to improve the change between the dark and bright parts of the image formed on the screen, a known method is to use a pair of auxiliary coils, the so-called horizontal scanning rate modulation coils; these coils can be stacked It is placed on one of the auxiliary magnetic fields on the horizontal deflection magnetic field generated by the main coil. According to -4- this paper size applies the Chinese Gardener Standard (CNS) A4 specification (plus χ tear compound) (please read the precautions on the back before filling in This page} -Shang ----- li order --------- line one 464905 Λ7 2 V. Description of the invention (This way in order to anticipate a large number of changes in the luminous signal and therefore modify the horizontal scanning rate. In addition, has been Known methods favorably arrange these auxiliary wires on the neck of the cathode tube. The horizontal deflection coils of the deflection system sometimes partially or completely overlap them. There are also known methods to make these auxiliary coils rigid by erosion. The flexible ring Ε6 is placed on a support, and an example of such a device can be described in European patent application 484,606. When a deflection system including an auxiliary coil is installed at the neck of the cathode tube for adjusting the scanning rate of the electron beam, The position of the auxiliary relative to the horizontal deflection line 圏 must be adjusted in order to make it more effective for the electron beam. To simplify the process of adjusting the deflection system on the neck of the cathode tube, it is possible to lengthen the substantially cylindrical rear portion of the isolator so that The auxiliary coil must be positioned relative to the deflection coil in advance. To increase the effect of the auxiliary coil, the coil must be placed as close as possible to the electric beam. This means that if it is supported by the rear part of the isolator, this part The cut surface is as small as possible. However, the substantially cylindrical rear part of the isolator has a transverse section with the lowest thickness so that the isolator is injected into the plastic and made in a simple way. 'The thickness is not guaranteed in the manufacture of the component. And the inner surface of the substantially cylindrical rear part must allow the front part to be inclined The oblique movement 'so prevents the internal surface from coming as close as possible to the surface of the cathode tube' and forces a gap between the internal surface of the separator and the cathode neck; the above two mechanical limitations are generally considered when manufacturing the component, first The technical deflection system is included on the periphery of the rear part of the isolator (please read the precautions on the back before filling this page) —-------- Order --------- line 0- Ministry of Economic Affairs Printed by Tonghui Property Bureau Staff Consumer Cooperatives-5-
本紙張尺度適对國國家標準（CNS)A4規格（2_10 X 297公楚"5 464905 A7 B7 經 濟 部 -智 慧 財 產 局 員 工 消 .費 合 作 社 印 製 五、發明說明（3 所配置之輔助線圈，其大厚度可導致輔助線圏係因大電流 被驅動由於該等線圈之低靈敏度，此係靈敏度係導源一項 事實即此等線圈之位置離光束之距離太大p 按本發明之偏轉器可併入—隔離器使其可能減少在辅助 線圈與光束間之距離最大，雖係容易製造且可確保良好機 械堅牢性。爲此，依本發明之偏轉器包括一對水平偏轉線 圈與一對垂直偏轉線圈，一隔離器使兩對線圈彼此絕緣且 包括可支援菘偏轉器在陰極管表面上之一種裝置，該隔離 奋具有一閃光之前面部分與一後面部分形狀爲實質上圓柱 形環，且沿一縱向軸Z延伸同時環繞陰極管之頸部。The size of this paper is in line with the national standard (CNS) A4 specification (2_10 X 297 Gongchu " 5 464905 A7 B7. Printed by the staff of the Ministry of Economic Affairs and the Intellectual Property Bureau. Fifth, the cooperative description. 5. The auxiliary coil configured, Its large thickness can cause auxiliary lines to be driven due to large currents. Due to the low sensitivity of these coils, this sensitivity is a source of guidance. The fact that the position of these coils is too far away from the beam. According to the deflector of the present invention, Incorporation-the isolator makes it possible to reduce the maximum distance between the auxiliary coil and the beam, although it is easy to manufacture and ensures good mechanical fastness. To this end, the deflector according to the invention includes a pair of horizontal deflection coils and a pair of vertical A deflection coil, an isolator that insulates two pairs of coils from each other and includes a device that can support a tritium deflector on the surface of a cathode tube, the isolator has a flashing front surface portion and a rear portion having a substantially cylindrical ring shape, and Extending along a longitudinal axis Z while surrounding the neck of the cathode tube.
其中後面部分顯示一區域其横切面爲一平面垂直於Z 軸，如此使内部周邊曲率之半徑値在至少該内部週邊兩點 處顯7JT爲最小〇 藉助以下説明及附圖可較佳了解本發明其中： 圖1代表裝有按先前技藝之偏轉器之一陰極射線管， 圖2係裝有按先前技藝之偏轉器之—陰極射線管後面部 分之縱向剖面圖， 圖3代表裝有按先前技藝之偏轉器之一陰極射線管經由 後面部分之橫向剖面圖， 圓4圖例鲜明本發明之第一實例， \ 圖5圓例説明本發明之第二實例， 圖6代表沿圖4所迷實例之垂直平面之一剖面圖。 圖1代表由在陰極射線管i後面處按習用方式所裝配一電 子槍發出使電子光束偏轉之一種系統2。該系統，亦稱之 «6- a n ^^1 ^^1 ^^1 ^^1 ^^1 il·' n ϋ §_% .^1 ^^1 -V (請先閱讀背面之注$項再填寫本頁) 訂---------線、γ 4G49 Ο 5 Λ7 a? 經濟部智慧財產局員工消費合作社印製 五、發明說明（4 ) 爲一偏轉器，包括兩對線圈3用於光朿之水平及垂直偏 轉’此兩對線圈係藉—隔離器使其彼此絕緣，隔離器一般 係用塑膠注入-鑄模内所製成。隔離器包括一有角之前面 部分12，—照明之中間部分η ,與—接合至照明部分ι〇 义實質上圓柱形狀之後面部分8。此偏轉器，在調整其在 陰極管頸部6上之位置以後，係藉助在前面之可調整腳η 與在後面（鎖緊環9持定在位。習用上，_輔助線圈5，例 如用於調變水平掃描率，係配置在偏轉器2後方之陰極管 頸部上。此裝置有冑項缺點，諸如加長陰極管頸部以便讓 輔助線圏安裝以及一旦業已安裝妥此輔助線圈即難以操作 偏轉器。 較佳係按圖2縱向剖面所代表之位置，其中並非代表偏 轉線圈，且按圖3橫向剖面所示裝置。輔助線圈5此處係配 置在隔離器1 2後面部分外部表面上，隔離器實質上圓柱形 8且馬恆等厚度2 1。此裝置使其可能在安裝在陰極管頸部 以則以聯合輔助線圈與主偏轉線圈但它含減少輔助線圈5 疋靈敏度由於其増大離其所作用之電子光東之離。此距離 係增大爲隔離器後面部分8厚度2丨之値，加上必須在隔離 器後面部分8與陰極管頸部6間所提供之間隔2 〇以便當調 整陰極管頌部上偏轉器時讓前面部分7之傾斜運動。按此 種方式選擇厚度2 1値以便讓隔離器3後面部分8係藉塑膠 眞空注入容易製造β 圖4及5代表本發明之第一實例。依此情況在陰極管頸部 上偏轉器之最後碉整需要按照祇一個軸例如繞水平軸ζ使 本紙張尺麵財_ 格⑽心7公変） 一?-t--------訂---------線 ... (請先閱讀背面之注.¾事項再填寫本頁) 464905 A7 Β7 五、發明說明（5 ) 偏轉器前面部分7有傾斜運動。隔離器之後面部分8係分成 兩區域3 0及3 1。區域3 〇係夾住項圈9在陰極管頸部上之區 域。區域3 1可支撑輔助線圈5並在隔離器易栓閃光定點處 即在1 0處終止。因區域3 〇係夾住在陰極管之頸部，隔離 器前面部分之傾斜運動祇影響後面部分8之區域3 1。 確保隔離器良好機械持久性所需自厚度2 1開始，按有利 方向可減少後面部分8之厚度。.按此情況，隔離器與垂直 平面Y Z文又之方向可讓繞水平軸傾斜運動。如圖4所示， 它可遵循：沿水平軸之厚度2丨係小於沿垂直軸方向之厚度 22 ° 圖4所示係隔離器與陰極管頸部之相關位置，該頸部係 表示在與該隔離器閃光部分丨〇接合之區域丨〇準位處按橫 向剖面視圖在其最大位置2 3及2 4。圖點〇表示當偏轉系統 未經前面部分7之傾斜運動時之陰極管頸部之中心，而圖 點0 '及0 "表示在前面部分7傾斜最大位置内隔離器之陰極 管碩邵之中心相對位置。參閱圖6，可知藉考量傾斜最大 容許角度與郅分3 1之長度即可計算偏向値（相對於在接合 點1 0準位處之陰極管頸部之中心）。它必然結果是：厚度 2 2可減少爲離開支撑項圈區域3 〇 一個數額，到達接合至 隔離器閃忠部分之區域10。在後面區域内隔離器之外表面 26仍τξ：在 k向剖面平面内，實質上圓形，雖然其内表 面有一可誕之曲率半徑，有一最低値，在最低厚度兩區域 之準位處，相應於與¥2平面交叉之諸點，且有一最大 値’在最大厚度兩區域之準位處，相應於與xz平面交又 (請先閲讀背面之注意事項再填寫本頁) --線 η· / \ 經濟部智慧財產局員工消費合作社印製 -- 8 - 4649 0 5 A7 B7 經 濟 部 -智 慧 財 k 局 消 .費 合 作 社 印 製 五、發明說明（ 之點 倘若凡藉繞-垂直軸傾斜前面部分僅僅調整傾斜處，區 域3 1之合成結構係與稍早所述者㈣，最大與最小厚度之 區域係僅僅徑向偏置9 〇 (繞縱向軸z )。 由圖5所示之第二實例因而產生相對於前面部分倾斜運 動义進一步限制，其中係必須繞一垂直轴與一水平轴兩者 執行。按此情況，以在接合區1〇準位處所述圖5之橫向剖 面視H照圖點〇1至〇8可位移由陰極管頸部外圓形表 面40所佔有之最大位置。按此等最大位置，陰極管頸部會 接觸隔離器之内部表面25。以部分31之長度與傾斜最大 角度爲基礎如前述可計算値之差距，（代表沿水平與垂直 方向相對於隔離器之内部表面2 5圓形表面4 〇中心之相對 位移）。 ' 按此情況，此可造成由一可變曲率半徑所界定之圓柱形 部分3 1之一内部表面25，此曲率半徑具有，在相對於又軸 及Y轴所對稱配置之四點A，B，c，D處，一小於在四點 E , F，G，Η處之値。相應之外部表面2 6係圓形以便接收 輔助線圈，隔離器後面部分3 1之厚度顯示在四點Α，Β ’ C ’ D準位處之橫向剖面四區域之厚度少於在四點ε，F， G，Η準位處之其他四區域之厚度。 例如，依據本發明爲界定一隔離器後面部分内徑之外形 包括沿（0.5 (之X及Υ軸傾斜最大値作爲限制，以圓柱形部 .分31之長度固定在30 mm處’首先計算内徑内陰極管頸部 中心之相對運動如下： • 9 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） .. . .丨~i (請先閱讀背面之注意事項再填寫本頁) ---—訂---------線^}· 46 4 9 Q 5 A7 B7 ^、發明說明（7 ) (=30 x tan(0_5() = 0.26 mm. 根據此値與頸部外直徑値，一値可界定内部表面面積。 因之’對有頸部直徑等於29.7 mm之陰極管 B ’使四點A， B，C，D位於一距離等於： OA = (29.7/2) + 0.26 x V2 = 15.22 mm 由中心Ο。 使四點Ε ’ F ’ G ’ Η係位於一距離等於： ΟΕ = (29.7/2) + 0.26 = 15.1 1 mm 由中心0。 可選擇外侧表面2 6之直徑在最低處以便符合機械強度限 制與塑膠注入鑄模之限制。在先前技藝内其中内部表面係 圓錐形，爲獲得塑膠良好注入鑄模内之最低厚度會導致在 接合區域10内選擇的0.9 mm厚度。 本發明之優點是可使其可能選擇一小於先前技藝其厚产 係恆等之外側直徑：此乃因爲，在本發明之構架以内人 擇繞四點A，B，C，D之甚小厚度並不損及塑膠注入 ， 區域内因塑膠可經由較大厚度之區域橫向參透，例如在等 點E，F，G，Η。因此在接合區域内能獲得之最小厚度= 處可降低至0.79 mm ’亦即，厚度減少約1 2 %。 (請先閱讀背面之注意事項再填寫本頁) -----1 J I 訂-------I ·線一 經濟部智慧財產局員工消費合作社印製 - -10- 本紙張尺度適用中國國家標準（CNS)A4規格（210 x 297公釐） 464905 第89111928號專利申請案 中文說明書修正頁(90年9月） 五、發明説明（7a ) -10a- 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 元件符號簡要說明 1 陰極射線管 2 偏轉系統 3 線圈 5 辅助線圈 6 頸部 7 前面部分 S 後面部分/圓柱形環 9 鎖緊環 10 閃光部分/接合區 11 中間部分 12 前面部分/隔離器 13 調整脚 20 間隔 21 厚度 22 厚度 23,24 最大位置 25 内表面 26 外表面 30,31 區域 40 外圓形表面The rear part shows a region whose cross-section is a plane perpendicular to the Z axis, so that the radius of the curvature of the inner periphery is minimized by 7JT at at least two points of the inner periphery. The invention can be better understood with the help of the following description and drawings Among them: Fig. 1 represents a cathode ray tube equipped with a deflector according to the prior art, Fig. 2 is a longitudinal sectional view of a rear part of the cathode ray tube equipped with a deflector according to the prior art, and Fig. 3 represents a device equipped with the prior art One cross section of the cathode ray tube of the deflector through the rear part. The circle 4 illustrates the first example of the present invention, FIG. 5 illustrates the second example of the present invention, and FIG. 6 represents the example shown in FIG. 4. A sectional view of one of the vertical planes. Fig. 1 represents a system 2 for deflecting an electron beam emitted by an electron gun mounted conventionally behind a cathode ray tube i. This system, also known as «6- an ^^ 1 ^^ 1 ^^ 1 ^^ 1 ^^ 1 il · 'n § §_%. ^ 1 ^^ 1 -V (Please read the note on the back first (Fill in this page again) Order --------- line, γ 4G49 Ο 5 Λ7 a? Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (4) is a deflector, including two pairs of coils 3 Horizontal and vertical deflections for optical beams. These two pairs of coils are insulated from each other by an isolator. The isolator is generally made of plastic injection-mold. The isolator includes an angled front surface portion 12, the middle portion η of the illumination, and-joined to the illumination portion ι to define a substantially cylindrical rear surface portion 8. This deflector, after adjusting its position on the neck 6 of the cathode tube, is adjusted by the adjustable feet η in the front and the rear (the locking ring 9 is held in place. In practice, _ auxiliary coil 5, for example, with For adjusting the horizontal scanning rate, it is arranged on the neck of the cathode tube behind the deflector 2. This device has a number of disadvantages, such as lengthening the neck of the cathode tube to allow the auxiliary coil to be installed and once the auxiliary coil has been installed, it is difficult Operate the deflector. It is preferably in the position represented by the longitudinal section of Fig. 2, which does not represent the deflection coil, and is shown in the transverse section of Fig. 3. The auxiliary coil 5 is here arranged on the outer surface of the rear part of the isolator 12 The isolator is substantially cylindrical 8 and Ma Heng's thickness 2 1. This device makes it possible to install the auxiliary coil and the main deflection coil in the neck of the cathode tube, but it contains 5 to reduce the auxiliary coil due to its large sensitivity. The distance from the electron beam to which it acts. This distance is increased to the thickness of the back part 8 of the isolator, and the distance 2 must be provided between the back part 8 of the isolator and the neck 6 of the cathode tube. When adjusting the deflector on the cathode of the cathode tube, let the tilting movement of the front part 7. Select the thickness 2 1 値 in this way so that the back part 8 of the isolator 3 can be easily manufactured by plastic hollow injection. Figures 4 and 5 represent the present invention The first example. According to this situation, the final deflection of the deflector on the neck of the cathode tube needs to make the paper surface size according to only one axis, for example, around the horizontal axis ζ 格格 心 7 公 変)-?-T-- ------ Order --------- Line ... (Please read the note on the back. ¾ Matters before filling out this page) 464905 A7 Β7 V. Description of the invention (5) Front part of the deflector 7 There is tilting motion. The rear part 8 of the isolator is divided into two areas 30 and 31. The area 30 is the area between the collar 9 and the neck of the cathode tube. The area 31 can support the auxiliary coil 5 and terminate at the spot where the isolator is easy to plug, that is, at 10. Because the area 30 is clamped on the neck of the cathode tube, the tilting motion of the front part of the separator only affects the area 31 of the rear part 8. It is necessary to ensure the good mechanical durability of the isolator from the thickness 21, and the thickness of the rear portion 8 can be reduced in an advantageous direction. According to this situation, the isolator and the vertical plane can be tilted around the horizontal axis. As shown in Figure 4, it can follow: the thickness 2 along the horizontal axis is less than the thickness along the vertical axis 22 ° Figure 4 shows the relative position of the separator and the neck of the cathode tube, which is shown in the The flashing part of the isolator, the joint area, and the horizontal position are at its maximum positions 2 3 and 24 according to the cross-sectional view. Figure point 0 represents the center of the neck of the cathode tube when the deflection system has not been tilted by the front section 7, and figure points 0 'and 0 " represent the cathode tube of the isolator in the maximum tilted position of the front section 7. Relative position of center. Referring to Fig. 6, it can be seen that the deflection 値 (relative to the center of the neck of the cathode tube at the joint 10 level) can be calculated by considering the maximum allowable angle of inclination and the length of the 郅 minute 31. The inevitable result is that the thickness 22 can be reduced to an amount 30 away from the support collar area, and reach the area 10 joined to the flasher portion of the isolator. In the rear region, the outer surface 26 of the isolator is still τξ: in the k-section plane, it is substantially circular, although its inner surface has a radiant curvature radius and a minimum chirp, at the level of the two regions of the minimum thickness, Corresponds to the points that intersect the ¥ 2 plane, and there is a maximum 値 'at the level of the two regions of the maximum thickness, corresponding to the intersection with the xz plane (please read the precautions on the back before filling this page) --line η · / \ Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperatives-8-4649 0 5 A7 B7 Printed by the Ministry of Economic Affairs-Wisdom Wealth Co., Ltd. Printed by Cooperatives Fifth, the description of the invention The front part only adjusts the inclination. The composite structure of the area 31 is different from the one described earlier, and the area with the maximum and minimum thickness is only radially offset 9 ° (about the longitudinal axis z). The two examples thus result in further restrictions on the tilting motion relative to the front part, in which the system must be performed around both a vertical axis and a horizontal axis. According to this situation, the horizontal cross-sectional view of FIG. H according to the picture point 〇1 〇8 The largest position occupied by the outer circular surface 40 of the neck of the cathode tube can be displaced. At these maximum positions, the neck of the cathode tube will contact the inner surface 25 of the isolator. Based on the length of the portion 31 and the maximum tilt angle As mentioned above, the difference of 値 can be calculated, (representing the relative displacement of the center of the isolator's internal surface, 25 circular surface, and 40 ° along the horizontal and vertical directions). 'In this case, this can be caused by a variable radius of curvature One of the inner surfaces 25 of the defined cylindrical portion 31, this radius of curvature has, at four points A, B, c, D symmetrically arranged with respect to the axis and Y axis, one less than four points E, F, G, 値 at Η. Corresponding external surface 26 is circular to receive auxiliary coils. The thickness of the rear part 31 of the isolator is shown at four points A, B 'C' D, and the thickness of the four areas in the transverse section Less than the thickness of the other four regions at the four points ε, F, G, and Η. For example, according to the present invention, the outer diameter of the inner diameter of the rear part of an isolator is defined to include (0.5 and the maximum inclination of the X and Υ axes)値 As a limitation, the cylindrical part is divided into 31 The degree is fixed at 30 mm '. First calculate the relative movement of the inner center of the inner diameter of the cathode tube neck as follows: • 9 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ... (Please read the notes on the back before filling out this page) ----- Order --------- Line ^} · 46 4 9 Q 5 A7 B7 ^, Description of the invention (7) (= 30 x tan (0_5 () = 0.26 mm. According to this and the outer diameter of the neck, the inner surface area can be defined by one. Therefore, 'for a cathode tube B with a neck diameter equal to 29.7 mm, let four points A, B, C , D is located at a distance equal to: OA = (29.7 / 2) + 0.26 x V2 = 15.22 mm from the center 0. Let the four points Ε ′ F ′ G ′ actinide be located at a distance equal to: ΟΕ = (29.7 / 2) + 0.26 = 15.1 1 mm from the center 0. The diameter of the outer surface 26 can be selected to be the lowest to meet the mechanical strength limit and the plastic injection mold limit. In the prior art in which the inner surface was conical, the minimum thickness to obtain a good injection of plastic into the mold would result in a thickness of 0.9 mm selected in the joint area 10. The advantage of the present invention is that it makes it possible to choose a diameter which is smaller than the thickness of the thick production line of the prior art. This is because the thickness of the four points A, B, C, and D is very small within the framework of the present invention. It does not damage the plastic injection, because the plastic in the area can penetrate through the area with a larger thickness, for example, at points E, F, G, and Η. Therefore, the minimum thickness that can be obtained in the joint area = can be reduced to 0.79 mm ′, that is, the thickness is reduced by about 12%. (Please read the precautions on the back before filling this page) ----- 1 JI Order ----- I · Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs--10- This paper size applies Chinese National Standard (CNS) A4 Specification (210 x 297 mm) 464905 No. 89111928 Patent Application Chinese Manual Correction Sheet (September 1990) V. Description of Invention (7a) -10a- This paper size applies Chinese National Standard CNS) A4 specification (210X 297 mm) Brief description of component symbols 1 cathode ray tube 2 deflection system 3 coil 5 auxiliary coil 6 neck 7 front part S rear part / cylindrical ring 9 locking ring 10 flash part / joint area 11 Middle part 12 Front part / Isolator 13 Adjusting feet 20 Space 21 Thickness 22 Thickness 23, 24 Maximum position 25 Inner surface 26 Outer surface 30, 31 Area 40 Outer circular surface