JPH10334824A - Electron gun for cathode-ray tube - Google Patents

Electron gun for cathode-ray tube

Info

Publication number
JPH10334824A
JPH10334824A JP6973098A JP6973098A JPH10334824A JP H10334824 A JPH10334824 A JP H10334824A JP 6973098 A JP6973098 A JP 6973098A JP 6973098 A JP6973098 A JP 6973098A JP H10334824 A JPH10334824 A JP H10334824A
Authority
JP
Japan
Prior art keywords
electrode
cathode
focusing electrode
anode
electron gun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6973098A
Other languages
Japanese (ja)
Inventor
Nobuyuki Suzuki
延幸 鈴木
Yasuo Tanaka
康夫 田中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Hitachi Electronic Devices Co Ltd
Original Assignee
Hitachi Ltd
Hitachi Electronic Devices Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Electronic Devices Co Ltd filed Critical Hitachi Ltd
Priority to JP6973098A priority Critical patent/JPH10334824A/en
Publication of JPH10334824A publication Critical patent/JPH10334824A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide an electron gun for a cathode-ray tube having a highly accurate main lens electrode, which is easy to assembled and appropriate for mass production, and in which supporting and fixing of an electrode is firm to enable highly accurate assembling. SOLUTION: For an electron gun for a cathode ray tube in which plural electrodes including a negative electrode, a color electrode, an accelerating electrode, the first positive electrode, a focusing electrode and the second positive electrode are arranged in a direction of a tube axial axis with a specific interval and the electrode supporting body 41 provided on a sidewall of each electrode is embedded in an insulation supporting body and fixed, a cylindrical part 4a on the positive electrode side and a cylindrical part 4b on the negative electrode side are linked at an intermediate part 4c, and an electrode-supporting body 41 is provided at a spot where an electron lens does not contribute to the formation of the focusing electrode.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は陰極線管に係り、特
に、その電子レンズの口径を大きくすると共に、大量産
性が容易であり、かつ精度良く組立てることを可能とし
た陰極線管用電子銃に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube, and more particularly to an electron gun for a cathode ray tube which has a large aperture of an electron lens, can be easily mass-produced, and can be assembled with high accuracy.

【０００２】[0002]

【従来の技術】陰極線管、特に投写型陰極線管等の高輝
度陰極線管においては、蛍光面に投射される電子ビーム
（電流）を大きくし、最終加速電極（陽極）に印加する
加速電圧を高くしかつ集束電極の電位も高くすることに
よって、高輝度，高精細の画像をその蛍光面に形成して
いる。2. Description of the Related Art In a high-intensity cathode ray tube such as a cathode ray tube, particularly a projection type cathode ray tube, an electron beam (current) projected on a phosphor screen is increased, and an acceleration voltage applied to a final acceleration electrode (anode) is increased. By increasing the potential of the focusing electrode, a high-brightness, high-definition image is formed on the fluorescent screen.

【０００３】そして、上記電子ビームの集束歪みを低減
するために、最終加速電極の口径はネック部の内径で制
限される範囲内で可能な限り大きくすることが試みられ
ている。In order to reduce the focusing distortion of the electron beam, attempts have been made to make the diameter of the final acceleration electrode as large as possible within a range limited by the inner diameter of the neck portion.

【０００４】図１４は従来の投写型陰極線管に使用され
ている大口径電子銃（以下、電子銃という）の一構造例
を説明する側面図、図１５は図１４を管軸Ｚ−Ｚ回りに
９０°回転させた側面図、図１６は集束電極の電子銃組
込み前の状態を示す図であって、電極の中心軸Ｚの上側
が断面図、下側が側面図である。図１４において、１は
内側に陰極を備えた第１電極（制御電極）、２は第２電
極（加速電極）、３は第３電極（第１陽極）、４は第４
電極（集束電極）、４ａは第４電極４のパネル側の筒状
部（以下、パネル側部）、４ｂは第４電極４の陰極側の
筒状部（以下、陰極側部）、４ｃは第４電極４の中間
部、４１は第４電極４の電極支持体、５は電子銃を構成
する電極の中で最も大きい径を有する第５電極（以下、
第２陽極または陽極ともいう）、６は絶縁支持体（以
下、ビードガラスとも言う）である。なお、符号１１，
２１，３１，５１は第１電極１、第２電極２、第３電極
３、第５電極５の電極支持体である。FIG. 14 is a side view illustrating an example of the structure of a large-diameter electron gun (hereinafter, referred to as an electron gun) used in a conventional projection type cathode ray tube. FIG. FIG. 16 is a view showing a state before the focusing electrode is incorporated into the electron gun. FIG. 16 is a cross-sectional view above the central axis Z of the electrode and a side view below the central axis Z of the electrode. In FIG. 14, 1 is a first electrode (control electrode) having a cathode inside, 2 is a second electrode (acceleration electrode), 3 is a third electrode (first anode), and 4 is a fourth electrode.
The electrode (focusing electrode), 4a is a tubular portion of the fourth electrode 4 on the panel side (hereinafter, panel side portion), 4b is a tubular portion of the fourth electrode 4 on the cathode side (hereinafter, cathode side portion), and 4c is An intermediate portion of the fourth electrode 4, 41 is an electrode support of the fourth electrode 4, and 5 is a fifth electrode (hereinafter, referred to as a fifth electrode) having the largest diameter among the electrodes constituting the electron gun.
Reference numeral 6 denotes an insulating support (hereinafter also referred to as bead glass). Note that reference numerals 11,
Reference numerals 21, 31, and 51 denote electrode supports for the first electrode 1, the second electrode 2, the third electrode 3, and the fifth electrode 5.

【０００５】同図において、第１電極１〜第５電極５
は、それぞれ単一の径または２種以上の径をもつ円筒状
の電極からなり、それぞれの電極を管軸に沿って整列さ
せている。電極を整列させた状態で、軟化させた一対の
絶縁支持体６を、管軸に対して横方向から押圧し、各電
極に形成した電極支持体１１，２１，３１，４１，５１
を絶縁支持体に埋設することにより固定される。In FIG. 1, first to fifth electrodes 5 to 5
Consists of cylindrical electrodes each having a single diameter or two or more diameters, and the electrodes are aligned along the tube axis. In a state where the electrodes are aligned, a pair of softened insulating supports 6 are pressed from the lateral direction with respect to the tube axis, and the electrode supports 11, 21, 31, 41, 51 formed on each electrode are pressed.
Embedded in the insulating support.

【０００６】この形式の電子銃では、第５電極５の径大
部５ａは他の電極に比較して内径が大きく、第５電極５
の径小部５ｂは第４電極４のパネル側部４ａより内径が
小さく、第５電極５の径大部５ａの内に第４電極４のパ
ネル側部４ａを収納し、第５電極５の径小部５ｂに設け
た電極支持体５１と第４電極４の陰極側部４ｂに設けた
電極支持体４１をビードガラス６に埋設して固定する。In this type of electron gun, the large-diameter portion 5a of the fifth electrode 5 has a larger inner diameter than the other electrodes.
The small-diameter portion 5b has a smaller inner diameter than the panel-side portion 4a of the fourth electrode 4, and accommodates the panel-side portion 4a of the fourth electrode 4 in the large-diameter portion 5a of the fifth electrode 5. The electrode support 51 provided on the small diameter portion 5b and the electrode support 41 provided on the cathode side 4b of the fourth electrode 4 are embedded and fixed in the bead glass 6.

【０００７】また、第４電極４は、図１６に示したよう
に、パネル側部４ａと陰極側部４ｂと、両者を連接する
円筒状の中間部４ｃとを一体化してなる。As shown in FIG. 16, the fourth electrode 4 is formed by integrating a panel side portion 4a, a cathode side portion 4b, and a cylindrical intermediate portion 4c connecting the both.

【０００８】そして、第５電極５と第４電極４とで電子
ビームを集束および加速する電子レンズ（主レンズ）を
構成し、第１電極１内に収納した陰極Ｋから取り出した
電子ビームを加速集束して蛍光面に向けて発射する。The fifth electrode 5 and the fourth electrode 4 constitute an electron lens (main lens) for focusing and accelerating the electron beam, and accelerate the electron beam taken out from the cathode K housed in the first electrode 1. Focus and launch towards the phosphor screen.

【０００９】第４電極４のパネル側部４ａの径を第５電
極５の径小部５ｂの径より大としたこの形式の電子銃
は、実効レンズ口径が大きく、その結果、解像度の優れ
た陰極線管を得ることができる。An electron gun of this type in which the diameter of the panel side portion 4a of the fourth electrode 4 is larger than the diameter of the small diameter portion 5b of the fifth electrode 5 has a large effective lens aperture, and as a result, has excellent resolution. A cathode ray tube can be obtained.

【００１０】図示した電子銃においては、主レンズ口径
を大きくし、第４電極４の管軸方向長さを長くすること
により集束の歪を低減する。図１６に示した電極は、電
子レンズを構成するための開口端部を有する第４電極の
パネル側部４ａと第４電極の陰極側部４ｂとの間を中間
部４ｃで連接して精度を向上させている。In the illustrated electron gun, the distortion of focusing is reduced by increasing the diameter of the main lens and increasing the length of the fourth electrode 4 in the tube axis direction. The electrode shown in FIG. 16 is connected at an intermediate portion 4c between a panel side portion 4a of a fourth electrode having an opening end for forming an electron lens and a cathode side portion 4b of the fourth electrode to improve accuracy. Have improved.

【００１１】図１７は従来の投写型陰極線管に使用され
ている電子銃の他の構造例を説明する側面図であって、
前記図１４と同一符号は同一機能部分に対応する。FIG. 17 is a side view for explaining another example of the structure of an electron gun used in a conventional projection type cathode ray tube.
The same reference numerals as those in FIG. 14 correspond to the same functional parts.

【００１２】この形式の電子銃では、主レンズ部は第５
電極（円筒状の第２陽極電極）５と、この第５電極５に
管軸方向で対向する第４電極（円筒状の集束電極）４３
１，４３２とで構成してなる。また４１ａ，４１ｂは分
割した第４電極４３１，４３２の電極支持体である。In this type of electron gun, the main lens portion is the fifth lens.
An electrode (cylindrical second anode electrode) 5 and a fourth electrode (cylindrical focusing electrode) 43 facing the fifth electrode 5 in the tube axis direction.
1,432. Reference numerals 41a and 41b denote electrode supports for the divided fourth electrodes 431 and 432, respectively.

【００１３】なお、上記従来技術を開示したものとして
は、例えば特公昭５８−３１６９６号公報を挙げること
ができる。The above-mentioned prior art is disclosed, for example, in Japanese Patent Publication No. 58-31696.

【００１４】[0014]

【発明が解決しようとする課題】上記従来の電子銃にお
いて、集束電極４をビードガラス６に固定するための電
極支持体４１は電子レンズを形成する陰極側部４ｂに溶
接等で設置されている。そのため、集束電極４の電極支
持体４１をビードガラス６に打ち込む際に、打ち込む押
圧力で集束電極４の陰極側部４ｂが押し潰されて変形し
する。すなわち、集束電極４の開口端の円が歪み、その
結果、精度のよい電子レンズの形成が出来なくなるとい
う問題があった。In the above-mentioned conventional electron gun, an electrode support 41 for fixing the focusing electrode 4 to the bead glass 6 is installed by welding or the like on the cathode side 4b forming an electron lens. . Therefore, when the electrode support 41 of the focusing electrode 4 is driven into the bead glass 6, the cathode side 4b of the focusing electrode 4 is crushed and deformed by the pressing force applied. That is, there is a problem that the circle at the opening end of the focusing electrode 4 is distorted, and as a result, it is impossible to form an accurate electron lens.

【００１５】一方、電極を固定する際の電極変形を少な
くするために打ち込み力を小さくすると電極とビードガ
ラスの支持力が低下してしまう。On the other hand, if the driving force is reduced in order to reduce the deformation of the electrode when fixing the electrode, the supporting force between the electrode and the bead glass is reduced.

【００１６】前記図１７に示した構造の電子銃は、主レ
ンズを構成する集束電極が大きい単一の径をもった円筒
形状であり、かつ管軸方向へ長い。このような電極は、
電子レンズが電極の円筒形状に影響を受けるため、全長
にわたって高精度が要求され、製造が難しい。また集束
電極の円筒電極４３１と４３２を単一電極とすると、そ
の管軸方向へさらに長くなり、全長にわたって高精度が
要求され、電極固定時に変形が起こり易く、また電極の
搬送時に変形が起こりやすく、電子銃の特性が劣化し、
画像が劣化するという問題があった。In the electron gun having the structure shown in FIG. 17, the focusing electrode constituting the main lens has a cylindrical shape having a single large diameter and is long in the tube axis direction. Such electrodes are
Since the electron lens is affected by the cylindrical shape of the electrode, high precision is required over the entire length, and manufacturing is difficult. When the cylindrical electrodes 431 and 432 of the focusing electrode are made a single electrode, the length is further increased in the tube axis direction, high accuracy is required over the entire length, and the electrode is easily deformed when the electrode is fixed, and is easily deformed when the electrode is transported. , The characteristics of the electron gun deteriorate,
There is a problem that the image is deteriorated.

【００１７】また、従来技術として、特開平１−２５８
３４６号公報がある。しかしながら、この電子銃の集束
電極は、陰極側端部に電子ビームに対し略々垂直な面が
形成され、この面に電子ビーム通過孔を形成している。
すなわち、このような集束電極では、電子ビーム通過孔
の大きさにつて考慮されているが、しかし、筒状電極の
内径の精度につては何等考慮されていない。As a prior art, Japanese Patent Laid-Open No.
No. 346 publication. However, the focusing electrode of this electron gun has a surface substantially perpendicular to the electron beam at the cathode end, and an electron beam passage hole is formed on this surface.
That is, in such a focusing electrode, the size of the electron beam passage hole is taken into consideration, but no consideration is given to the accuracy of the inner diameter of the cylindrical electrode.

【００１８】さらに、特開平９−２３１９１５号には、
第１陽極と集束電極とで形成される電子レンズの口径を
大きくするために、集束電極の陰極側の口径を隣合う電
極の口径より大きくしている。しかしながら、特開平９
−２３１９１５号に開示された集束電極は、電子レンズ
を形成する筒部の精度、電子銃の組立て易さ、組立てら
れた電子銃の精度、については何等考慮されていない。Further, JP-A-9-231915 discloses that
In order to increase the diameter of the electron lens formed by the first anode and the focusing electrode, the diameter of the focusing electrode on the cathode side is made larger than the diameter of the adjacent electrode. However, Japanese Patent Application Laid-Open
In the focusing electrode disclosed in JP-A-231915, no consideration is given to the accuracy of the cylindrical portion forming the electron lens, the ease of assembling the electron gun, and the accuracy of the assembled electron gun.

【００１９】集束電極４は一端を第２陽極内に挿入さ
れ、他の一端を第１陽極に対向している。電子ビームは
制御電極、加速電極を通過して徐々にその径が大きくな
り、その後電子ビームは主レンズにより集束作用を受け
て蛍光面上に集束する。電子ビームは、その径が大きい
状態で集束電極４と第１陽極で形成される電子レンズに
入射する。そのため集束電極４と第１陽極とで形成され
る電子レンズは高精度が要求される。また高精度の電子
レンズを形成するためには筒部が高精度でなければなら
ない。The focusing electrode 4 has one end inserted into the second anode and the other end facing the first anode. The diameter of the electron beam gradually increases after passing through the control electrode and the acceleration electrode, and thereafter, the electron beam is focused by the main lens and focused on the phosphor screen. The electron beam enters the electron lens formed by the focusing electrode 4 and the first anode in a state where the diameter of the electron beam is large. Therefore, the electron lens formed by the focusing electrode 4 and the first anode requires high accuracy. Further, in order to form a high-precision electronic lens, the cylindrical portion must have high precision.

【００２０】本発明の目的は、上記従来技術の問題点を
解消し、高精度に電子銃を組み立てることが可能であ
る、高精度の電極部品の大量生産が容易にできる、電極
の支持固定を堅固にできる、高精度の電子レンズを持
つ、などの効果を有する陰極線管用電子銃を提供するこ
とにある。An object of the present invention is to solve the above-mentioned problems of the prior art, to assemble an electron gun with high precision, to facilitate mass production of high-precision electrode parts, and to support and fix electrodes. An object of the present invention is to provide an electron gun for a cathode ray tube which has an effect of being able to be rigid and having a high-precision electron lens.

【００２１】[0021]

【課題を解決するための手段】上記目的を達成するため
に、本発明は、内径の大きい筒状電極（径大筒状電極）
と、パネル側部と陰極側部を中間部で連結した内径の小
さい筒状電極（径小筒状電極）とを有し、前記内径の小
さい筒状電極のパネル側部を前記内径の大きい筒状電極
の内に挿入して電子レンズを形成し、上記内径の小さい
筒状電極の中間部に電極支持体を設けた陰極線管用電子
銃である。In order to achieve the above object, the present invention provides a cylindrical electrode having a large inner diameter (a cylindrical electrode having a large diameter).
A small-diameter cylindrical electrode (small-diameter cylindrical electrode) having a panel side portion and a cathode side portion connected at an intermediate portion, and the panel side portion of the small-diameter cylindrical electrode is connected to the large-diameter cylinder. This is an electron gun for a cathode ray tube in which an electron lens is formed by being inserted into a cylindrical electrode, and an electrode support is provided at an intermediate portion of the cylindrical electrode having a small inner diameter.

【００２２】すなわち、第１の発明は、陰極、制御電
極、第１陽極、集束電極および第２陽極を含む複数の電
極を管軸方向に所定の間隔で配置し、各電極の側壁に設
けた電極支持体を絶縁支持体に埋設して固定した陰極線
管用電子銃において、前記電子銃は、陰極側部と中間部
とパネル側部とで異なる３つの径をもつ筒状の集束電極
を有し、前記第２陽極内に前記集束電極のパネル側部を
挿入して主レンズ部を形成し、前記集束電極は、前記中
間部の内径が前記パネル側部の内径より小さくかつ陰極
側部の内径より大きく、前記集束電極の中間部に前記電
極支持体を設けたことを特徴とする陰極線管。That is, in the first invention, a plurality of electrodes including a cathode, a control electrode, a first anode, a focusing electrode, and a second anode are arranged at predetermined intervals in the tube axis direction and provided on the side walls of each electrode. In a cathode ray tube electron gun in which an electrode support is embedded and fixed in an insulating support, the electron gun has a cylindrical focusing electrode having three different diameters at a cathode side, an intermediate part, and a panel side. Forming a main lens portion by inserting a panel side portion of the focusing electrode into the second anode, wherein the focusing electrode has an inner diameter of the intermediate portion smaller than an inner diameter of the panel side portion and an inner diameter of a cathode side portion. A cathode ray tube, wherein the electrode support is provided at an intermediate portion of the focusing electrode.

【００２３】第１の発明において、前記集束電極の管軸
方向長さは、中間部が陰極側部より長く且つ中間部がパ
ネル側部より長い。In the first invention, the length of the focusing electrode in the tube axis direction is longer at the middle portion than at the cathode side and longer at the middle portion than at the panel side.

【００２４】また、第１の発明において、前記径小筒状
電極の中間部の内径は、前記径小筒状電極のパネル側部
の内径より小さく、前記径小筒状電極の陰極側部の内径
より大きい。In the first invention, an inner diameter of an intermediate portion of the small-diameter cylindrical electrode is smaller than an inner diameter of a panel-side portion of the small-diameter cylindrical electrode, and an inner diameter of a cathode-side portion of the small-diameter cylindrical electrode is reduced. Larger than inner diameter.

【００２５】さらに、第１の発明において、前記径小筒
状電極の陰極側部の内径は、前記径小筒状電極のパネル
側部の内径より小で、前記径小筒状電極の中間部の内径
が前記径小筒状電極のパネル側部の内径より小径であ
る。Further, in the first invention, the inside diameter of the small-diameter cylindrical electrode on the cathode side is smaller than the inside diameter of the panel side of the small-diameter cylindrical electrode, and the middle part of the small-diameter cylindrical electrode is provided. Is smaller than the inside diameter of the small-diameter cylindrical electrode on the side of the panel.

【００２６】第２の発明は、陰極、制御電極、加速電
極、第１陽極、集束電極および第２陽極を含む複数の電
極を管軸方向に所定の間隔で配置し、各電極に設けた電
極支持体を絶縁支持体に埋設して固定した陰極線管用電
子銃において、前記電子銃は、管軸方向に伸び且つ陰極
側部と中間部とパネル側部とで異なる３つの径をもつ筒
状の集束電極を有し、前記第２陽極内に前記集束電極の
パネル側部を挿入して主レンズ部を形成し、前記集束電
極は第１陽極側の第１集束電極と陰極側の第２集束電極
の２つに分割されかつ電気的に接続されていることを特
徴とする陰極線管用電子銃。According to a second aspect of the present invention, a plurality of electrodes including a cathode, a control electrode, an accelerating electrode, a first anode, a focusing electrode, and a second anode are arranged at predetermined intervals in a tube axis direction, and an electrode provided for each electrode is provided. In a cathode ray tube electron gun in which a support is embedded and fixed in an insulating support, the electron gun has a cylindrical shape extending in the tube axis direction and having three different diameters at a cathode side portion, an intermediate portion, and a panel side portion. A focusing electrode, wherein a panel side of the focusing electrode is inserted into the second anode to form a main lens portion, wherein the focusing electrode includes a first focusing electrode on a first anode side and a second focusing electrode on a cathode side. An electron gun for a cathode ray tube, wherein the electron gun is divided into two electrodes and electrically connected.

【００２７】上記構成により、電子銃組み立て工程で加
熱軟化させたビーディングガラスに電極支持体を押圧し
て埋設する際に当該電極に生じる変形及び電極支持体を
電極に溶接する際に生じる変形は、パネル側部あるいは
陰極側部と中間部の境界に形成される円周段差によって
上記パネル側部あるいは陰極側部に及ばない。また電極
部品の取り扱いが容易になる。したがって、上記パネル
側部あるいは陰極側部の精度が維持される。According to the above configuration, the deformation that occurs when the electrode support is pressed and embedded in the beading glass that has been heated and softened in the electron gun assembling step, and the deformation that occurs when the electrode support is welded to the electrode, are reduced. Due to a circumferential step formed at the boundary between the panel side or the cathode side and the intermediate portion, the area does not reach the panel side or the cathode side. In addition, the handling of the electrode component becomes easy. Therefore, the accuracy of the panel side or the cathode side is maintained.

【００２８】さらに、第３の発明は、陰極、制御電極、
加速電極、第１陽極、集束電極および第２陽極を含む複
数の電極を管軸方向に所定の間隔で配置し、各電極の側
壁に設けた電極支持体を絶縁支持体に埋設して固定した
陰極線管用電子銃において、前記電子銃の最終円筒電極
とこの最終円筒電極に管軸方向で対向する円筒状の集束
電極とで主レンズ部を構成してなり、前記集束電極は陽
極側に陽極側筒状部を有し、陰極側に陰極側筒状部を有
し、前記陽極側筒状部と前記陽極側筒状部とを連接する
径小部（中間部）に前記電極支持体を設けたことを特徴
とする。Further, a third aspect of the present invention relates to a cathode, a control electrode,
A plurality of electrodes including an accelerating electrode, a first anode, a focusing electrode and a second anode were arranged at predetermined intervals in the tube axis direction, and the electrode supports provided on the side walls of each electrode were embedded in the insulating support and fixed. In the electron gun for a cathode ray tube, a main lens portion is constituted by a final cylindrical electrode of the electron gun and a cylindrical focusing electrode opposed to the final cylindrical electrode in a tube axis direction, and the focusing electrode has an anode side and an anode side. The electrode support is provided in a small-diameter portion (intermediate portion) having a tubular portion, having a cathode-side tubular portion on the cathode side, and connecting the anode-side tubular portion and the anode-side tubular portion. It is characterized by having.

【００２９】この発明の構成により、円筒電極の管軸方
向長さが短縮できると共に高い精度を必要とする電極端
部の領域を小さくして、ビードガラスへの固定時の変形
及び電極支持体を電極に溶接する際に生じる変形を前記
陽極側部と陰極側部の段差で吸収し、電子レンズ形成部
の精度劣化を防止できる。According to the structure of the present invention, the length of the cylindrical electrode in the tube axis direction can be shortened and the area of the electrode end requiring high precision is reduced, so that the deformation at the time of fixing to the bead glass and the electrode support are reduced. Deformation that occurs when welding to the electrode is absorbed by the step between the anode side and the cathode side, and the accuracy deterioration of the electron lens forming portion can be prevented.

【００３０】そして、第３の発明において、前記集束電
極は前記中間部で２つに分割され、前記集束電極は管軸
方向に陽極側筒状部を有する第１集束電極と陰極側筒状
部を有する第２集束電極とに分割され、前記中間部に前
記電極支持体を設け、かつ前記各中間部を電気的に連接
した。In the third invention, the focusing electrode is divided into two at the intermediate portion, and the focusing electrode is divided into a first focusing electrode having an anode-side tubular portion in a tube axis direction and a cathode-side tubular portion. And a second focusing electrode having the following structure. The electrode support is provided in the intermediate portion, and the intermediate portions are electrically connected.

【００３１】この構成によっても、円筒電極の管軸方向
長さが短縮できると共に高い精度を必要とする電極端部
の領域を小さくして、ビードガラスへの固定時の変形及
び電極支持体を電極に溶接する際に生じる変形を前記各
円筒電極の陽極側部と陰極側部の段差で吸収し、精度劣
化を防止できる。According to this configuration, the length of the cylindrical electrode in the tube axis direction can be reduced, and the area of the electrode end, which requires high accuracy, is reduced, so that the deformation at the time of fixing to the bead glass and the electrode support are reduced. Deformation that occurs when welding is performed is absorbed by the steps between the anode side and the cathode side of each of the cylindrical electrodes, thereby preventing deterioration in accuracy.

【００３２】このように、電子レンズを構成する筒状電
極の電極支持体を中間部に設けることで、筒状電極の電
子レンズ形成部分である陰極側部および陽極側部を短く
して当該部分の変形を伴うことなく高精度に製造でき、
電子銃の組立て作業も容易になり、量産性を向上でき
る。As described above, by providing the electrode support for the cylindrical electrode constituting the electron lens at the intermediate portion, the cathode side and the anode side, which are the electron lens forming portions of the cylindrical electrode, are shortened. It can be manufactured with high accuracy without deformation of
The assembling work of the electron gun is also facilitated, and mass productivity can be improved.

【００３３】[0033]

【発明の実施の形態】以下、本発明の実施の形態につ
き、図示した実施例を参照して詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the illustrated embodiments.

【００３４】図１は本発明による陰極線管用電子銃の第
１実施例を示す一部断面図であって、電極の中心軸Ｚの
上側が断面図、下側が側面図である。第１実施例は集束
電極の２個所に段差を設け電子レンズを形成しない中間
部に電極支持体を設けた。FIG. 1 is a partial cross-sectional view showing a first embodiment of the electron gun for a cathode ray tube according to the present invention. The upper side of the center axis Z of the electrode is a cross-sectional view, and the lower side is a side view. In the first embodiment, an electrode support is provided at an intermediate portion where a step is provided at two places of the focusing electrode and an electron lens is not formed.

【００３５】同図において、４は径小筒状電極である集
束電極、４ａは集束電極４のパネル側の筒状部（以下、
パネル側部という）、４ｂは集束電極４の陰極側の筒状
部（以下、陰極側部という）、４ｃは集束電極４の中間
部、４１は集束電極４の電極支持体である。In the drawing, reference numeral 4 denotes a focusing electrode which is a small-diameter cylindrical electrode, and reference numeral 4a denotes a panel-side tubular portion of the focusing electrode 4 (hereinafter referred to as a cylindrical portion).
Reference numeral 4b denotes a tubular portion on the cathode side of the focusing electrode 4 (hereinafter, referred to as a cathode side), 4c denotes an intermediate portion of the focusing electrode 4, and 41 denotes an electrode support for the focusing electrode 4.

【００３６】同図において、集束電極４は、パネル側部
４ａと陰極側部４ｂおよび中間部４ｃを絞り加工により
単一の電極部品として製作したものである。In the drawing, the focusing electrode 4 is one in which the panel side portion 4a, the cathode side portion 4b, and the intermediate portion 4c are manufactured as a single electrode component by drawing.

【００３７】この集束電極４において、Ｄ１は陽極５に
収納されて主レンズを形成するパネル側部４ａの内径で
あり、Ｄ２は陰極側の電極と対向して電子レンズを形成
する陰極側部４ｂの内径である。このパネル側部４ａと
陰極側部４ｂは夫々電子レンズを形成するため、精度の
高い筒であることを必要とする。例えば、陰極線管の管
軸に対し垂直な面での断面を円にすることで、歪みの無
い電子レンズをつくることができる。一方、Ｄ３は中間
部４ｃの内径であり、中間部はパネル側部４ａと陰極側
部４ｂを連結するものであり、高精度である必要はな
い。上記各径Ｄ１、Ｄ２、Ｄ３は、Ｄ１＞Ｄ３＞Ｄ２の
関係にある。In the focusing electrode 4, D1 is the inside diameter of the panel side 4a housed in the anode 5 to form the main lens, and D2 is the cathode side 4b facing the cathode side electrode and forming an electron lens. Is the inner diameter of Since the panel side 4a and the cathode side 4b each form an electron lens, they need to be highly accurate cylinders. For example, an electron lens without distortion can be manufactured by making a cross section in a plane perpendicular to the tube axis of the cathode ray tube into a circle. On the other hand, D3 is the inner diameter of the intermediate portion 4c, and the intermediate portion connects the panel side portion 4a and the cathode side portion 4b, and does not need to be highly accurate. The diameters D1, D2, and D3 have a relationship of D1>D3> D2.

【００３８】パネル側部４ａ、陰極側部４ｂ、中間部４
ｃの電極板厚は略々同じである。Panel side 4a, cathode side 4b, middle 4
The electrode plate thickness of c is substantially the same.

【００３９】また図１において、Ｌ１は集束電極４のパ
ネル側部４ａの管軸方向の長さ、Ｌ２は集束電極４の陰
極側部４ｂの管軸方向の長さ、Ｌ３は集束電極４の中間
部４ｃの管軸方向の長さである。パネル側部４ａと陰極
側部４ｂは夫々電子レンズを形成するので、電子レンズ
を形成するために必要な長さをもっている。また、パネ
ル側部４ａの管軸方向の長さＬ１と陰極側部４ｂの管軸
方向の長さＬ２を中間部４ｃの管軸方向の長さＬ３より
短くしているので、集束電極の両開口端の歪みを少なく
できる。なお、上記各長さＬ１、Ｌ２、Ｌ３は、Ｌ３＞
Ｌ１，Ｌ３＞Ｌ２の関係にある。In FIG. 1, L1 is the length of the focusing electrode 4 in the tube axis direction of the panel side 4a, L2 is the length of the cathode side 4b of the focusing electrode 4 in the tube axis direction, and L3 is the length of the focusing electrode 4. This is the length of the intermediate portion 4c in the tube axis direction. Since the panel side 4a and the cathode side 4b each form an electronic lens, they have a length necessary to form an electronic lens. Further, since the length L1 of the panel side 4a in the tube axis direction and the length L2 of the cathode side 4b in the tube axis direction are shorter than the length L3 of the intermediate portion 4c in the tube axis direction, both ends of the focusing electrode are formed. Distortion at the open end can be reduced. The lengths L1, L2, and L3 are L3>
L1, L3> L2.

【００４０】そして、この中間部４ｂの管軸方向長さＬ
３を長くし、パネル側部４ａの管軸方向長さＬ１と陰極
側部４ｂの管軸方向長さＬ２を短くすることで、円形状
を保たなければならない領域が狭くなり、集束電極４を
高精度に且つ容易に製作することが可能となる。また、
中間部４ｂの管軸方向長Ｌ３さを長くし、陰極側部４ｂ
の管軸方向長さＬ２のみを短くすることでも、集束電極
４を高精度に且つ容易に製作することが可能となる。The length L of the intermediate portion 4b in the pipe axis direction is
3, the length of the panel side portion 4a in the tube axis direction L1 and the length of the cathode side portion 4b in the tube axis direction L2 are shortened, so that the area in which the circular shape must be maintained becomes narrower. Can be manufactured with high precision and easily. Also,
The length L3 in the tube axis direction of the intermediate portion 4b is increased, and the cathode side portion 4b
By shortening only the length L2 in the tube axis direction, the focusing electrode 4 can be manufactured easily with high precision.

【００４１】そして、この電極をビードガラスに固定す
るための電極支持体４１を中間部４ｂに溶接したことで
電子銃組み立て工程で加熱軟化させたビードガラスに電
極支持体を押圧して埋設する際に当該電極に生じる変形
は、集束電極の陽極側部あるいは陰極側部と中間部の境
界に形成される円周段差によって上記陽極側部あるいは
陰極側部に及ばない。したがって、上記陽極側部あるい
は陰極側部の精度が維持される。When the electrode support 41 for fixing the electrode to the bead glass is welded to the intermediate portion 4b, the electrode support is pressed and buried in the bead glass heated and softened in the electron gun assembling step. The deformation that occurs in the electrode does not reach the anode side or the cathode side due to a circumferential step formed at the boundary between the anode side or the cathode side and the intermediate part of the focusing electrode. Therefore, the accuracy of the anode side portion or the cathode side portion is maintained.

【００４２】図２は本発明による陰極線管用電子銃の第
１実施例の全体構造を説明する側面図、図３は図２を管
軸Ｚ−Ｚ回りに９０°回転させた側面図であって、前記
図１４と同様に、Ｋは陰極、１は第１電極（制御電
極）、２は第２電極（加速電極）、３は第３電極（第１
陽極）、４は第４電極（集束電極）、４１は集束電極４
の電極支持体、５は第５電極（以下、第２陽極または陽
極ともいう）、６は絶縁支持体（ビードガラス）であ
る。なお、符号１１，２１，３１，５１は第１電極１、
第２電極２、第３電極３、第５電極５の電極支持体であ
る。FIG. 2 is a side view for explaining the overall structure of the first embodiment of the electron gun for a cathode ray tube according to the present invention, and FIG. 3 is a side view of FIG. 2 rotated by 90 ° around the tube axis ZZ. 14, K is a cathode, 1 is a first electrode (control electrode), 2 is a second electrode (acceleration electrode), and 3 is a third electrode (first electrode).
Anode, 4 is a fourth electrode (focusing electrode), 41 is a focusing electrode 4
5 is a fifth electrode (hereinafter also referred to as a second anode or an anode), and 6 is an insulating support (bead glass). Reference numerals 11, 21, 31, and 51 denote first electrodes 1,
An electrode support for the second electrode 2, the third electrode 3, and the fifth electrode 5.

【００４３】同図において、第１電極１〜第５電極５
は、それぞれ単一の径または２種以上の径をもつ円筒状
または板状の電極からなり、それぞれの電極を管軸に沿
って整列させている。In the figure, a first electrode 1 to a fifth electrode 5
Consists of cylindrical or plate-like electrodes each having a single diameter or two or more diameters, and the electrodes are aligned along the tube axis.

【００４４】これらの電極は、図１８に示すように、電
子ビーム通路を、中心軸Ｚに中心が一致した１本の組立
て用軸棒（マウントピン）６０に通し、かつ所定の間隔
を持って組み立てられる。この時、最も口径の大きい陽
極を一番下にして順次陰極側の電極を積み上げて組立て
る。このため上記組立て用軸棒は陽極側から陰極側にむ
かって小さい径を有している。さらに、上記組立て用軸
棒６０の外径はそれぞれの電極の内径の一部または全部
と略々合致し、組立て用軸棒の中心軸と各電極の中心軸
とがそれぞれ一致するように形成されている。すなわ
ち、組立て用軸棒６０は、組立て用軸棒の側面と電極の
内面が接触することにより、組立て用軸棒の中心軸と各
電極の中心軸とが一致するように形成されている。As shown in FIG. 18, these electrodes pass the electron beam path through a single assembling shaft (mounting pin) 60 whose center coincides with the center axis Z, and are spaced at a predetermined interval. Assembled. At this time, the cathode side electrodes are sequentially stacked and assembled with the anode having the largest diameter at the bottom. Therefore, the assembling shaft has a smaller diameter from the anode side to the cathode side. Further, the outer diameter of the assembling rod 60 substantially coincides with a part or the whole of the inner diameter of each electrode, and the central axis of the assembling rod and the central axis of each electrode are formed so as to coincide with each other. ing. That is, the assembling rod 60 is formed so that the center axis of the assembling rod and the center axis of each electrode coincide with each other when the side surface of the assembling rod and the inner surface of the electrode come into contact with each other.

【００４５】次に、各電極を整列させた状態で、軟化さ
せた一対の絶縁支持体６を、管軸に対して横方向から押
圧し、各電極に形成した電極支持体１１，２１，３１，
４１，５１を絶縁支持体に埋設することにより固定され
る。Next, in a state where the electrodes are aligned, a pair of softened insulating supports 6 are pressed laterally with respect to the tube axis, and the electrode supports 11, 21 and 31 formed on the respective electrodes are pressed. ,
It is fixed by embedding 41 and 51 in an insulating support.

【００４６】この形式の電子銃では、第５電極５の径大
部５ａは他の電極に比較して径が大きく、第５電極５の
径小部５ｂは集束電極４のパネル側部４ａより径が小さ
く、第５電極５の径大部５ａ内に集束電極４のパネル側
部４ａを収納し、第５電極５の径小部５ｂに設けた電極
支持体５１と集束電極４の陰極側部４ｂに設けた電極支
持体４１をビードガラス６に埋設して固定する。In this type of electron gun, the large-diameter portion 5a of the fifth electrode 5 has a larger diameter than the other electrodes, and the small-diameter portion 5b of the fifth electrode 5 is closer to the panel side 4a of the focusing electrode 4. The panel side portion 4a of the focusing electrode 4 is accommodated in the large-diameter portion 5a of the fifth electrode 5, and the electrode support 51 provided on the small-diameter portion 5b of the fifth electrode 5 and the cathode side of the focusing electrode 4 have a small diameter. The electrode support 41 provided in the portion 4b is embedded in the bead glass 6 and fixed.

【００４７】このとき、集束電極４のパネル側部４ａの
内面と陰極側部４ｂの内面とが組立て用軸棒６０の側面
に接触している。すなわち、この接触部は高精度に形成
する必要がある。上記実施例によれば、筒状電極の両端
を組立て用軸棒６０と同軸にしているので、電極を容易
に、かつ正確に並べることができる。また筒状電極の両
端だけを同軸にしているので、高精度に作らなければな
らない領域が狭い。よって、本発明の電極は容易に作る
ことができる。At this time, the inner surface of the panel side portion 4a of the focusing electrode 4 and the inner surface of the cathode side portion 4b are in contact with the side surface of the assembly shaft 60. That is, this contact portion needs to be formed with high precision. According to the above embodiment, since both ends of the cylindrical electrode are coaxial with the assembly shaft 60, the electrodes can be easily and accurately arranged. Also, since only the two ends of the cylindrical electrode are coaxial, the area that must be made with high precision is narrow. Therefore, the electrode of the present invention can be easily manufactured.

【００４８】そして、上記集束電極４は前記図１に示し
た構造を有する電極である。The focusing electrode 4 is an electrode having the structure shown in FIG.

【００４９】この実施例により、高精度の電子銃を高い
量産性で製造することができ、高画質の陰極線管を提供
できる。According to this embodiment, a high-accuracy electron gun can be manufactured with high mass productivity, and a high-quality cathode ray tube can be provided.

【００５０】図４は本発明による陰極線管用電子銃の第
２実施例を示す一部断面図であって、電極の中心軸Ｚの
上側が断面図、下側が側面図である。図４において、前
記図１と同一符号は同一機能部分に対応する。FIG. 4 is a partial sectional view showing a second embodiment of the electron gun for a cathode ray tube according to the present invention, wherein the upper side of the center axis Z of the electrode is a sectional view and the lower side is a side view. 4, the same reference numerals as those in FIG. 1 correspond to the same functional parts.

【００５１】電子銃は、陰極、制御電極、加速電極、第
１陽極、集束電極および第２陽極を含む複数の電極を管
軸方向に所定の間隔で配置し、各電極に設けた電極支持
体を絶縁支持体に埋設して固定している。In the electron gun, a plurality of electrodes including a cathode, a control electrode, an accelerating electrode, a first anode, a focusing electrode and a second anode are arranged at predetermined intervals in a tube axis direction, and an electrode support provided on each electrode is provided. Embedded in an insulating support.

【００５２】集束電極は、管軸方向に伸び且つ陰極側部
と中間部とパネル側部とで異なる３つの径をもつ筒状で
あり、第２陽極内に集束電極のパネル側部を挿入して主
レンズ部を形成している。The focusing electrode has a cylindrical shape extending in the tube axis direction and having three different diameters at the cathode side, the intermediate portion, and the panel side. The panel side of the focusing electrode is inserted into the second anode. To form a main lens portion.

【００５３】第２実施例では、集束電極４を陽極側の第
１集束電極４０１と陰極側の第２集束電極４０２とに分
割し、陰極側部４ｂにギャップＶＭを形成して分割して
いる。第１集束電極４０１は、段差を２個所に設け、電
子レンズの形成されない中間部に電極支持体を設けた。
４ｂ１は第１集束電極４０１の陰極側部である。In the second embodiment, the focusing electrode 4 is divided into a first focusing electrode 401 on the anode side and a second focusing electrode 402 on the cathode side, and a gap VM is formed on the cathode side 4b to be divided. . The first focusing electrode 401 has two steps, and an electrode support is provided at an intermediate portion where no electron lens is formed.
4b1 is a cathode side of the first focusing electrode 401.

【００５４】第１集束電極４０１は、パネル側部４ａと
陰極側部４ｂ１および中間部４ｃを絞り加工により単一
の電極部品として製作したものである。第２集束電極４
０２は円筒状の単一電極部品として製作されたものであ
る。集束電極４は第１集束電極４０１の陰極側部４ｂ１
と第２集束電極との開口端縁を対向させ、両者を接続部
材４２で電気的に接続したものである。The first focusing electrode 401 is one in which the panel side portion 4a, the cathode side portion 4b1, and the intermediate portion 4c are manufactured as a single electrode component by drawing. Second focusing electrode 4
02 is manufactured as a cylindrical single electrode part. The focusing electrode 4 is a cathode side portion 4b1 of the first focusing electrode 401.
The opening edges of the first focusing electrode and the second focusing electrode are opposed to each other, and both are electrically connected by the connecting member 42.

【００５５】ギャップＶＭを設けることにより、集束電
極４の電極長を変えること無く、電極部品（第１集束電
極４０１、第２集束電極４０２）を短くできるので、電
極部品が強くなり、各電極部品の変形を少なくできる。
またネック部外面においてギャップＶＭの近傍に速度変
調コイルを配置することにより、容易にコントラストが
向上し、高品質の画像を得ることができる。By providing the gap VM, the electrode components (the first focusing electrode 401 and the second focusing electrode 402) can be shortened without changing the electrode length of the focusing electrode 4, so that the electrode components are strengthened and each electrode component is strengthened. Deformation can be reduced.
Further, by disposing the velocity modulation coil near the gap VM on the outer surface of the neck portion, the contrast can be easily improved, and a high-quality image can be obtained.

【００５６】また図４において、Ｌ１は集束電極４のパ
ネル側部４ａの管軸方向の長さ、Ｌ２１は第１集束電極
４０１の陰極側部４ｂ１の管軸方向の長さ、Ｌ２２は第
２集束電極４０２の管軸方向の長さ、Ｌ３は第１集束電
極４０１の中間部４ｃの管軸方向の長さである。パネル
側部４ａと第２集束電極４０２の径小部４ｂ２は夫々電
子レンズを形成するので、電子レンズを形成するために
必要な長さをもっている。また、パネル側部４ａの管軸
方向の長さＬ１と第１集束電極４０１の陰極側部４ｂ１
の管軸方向の長さＬ２を中間部４ｃの管軸方向の長さＬ
３より短くしているので、集束電極の両開口端の歪みを
少なくできる。なお、上記各長さＬ１、Ｌ２１、Ｌ２
２、Ｌ３は、Ｌ３＞Ｌ１，Ｌ３＞Ｌ２１の関係にある。In FIG. 4, L1 is the length of the focusing electrode 4 in the tube axis direction of the panel side 4a, L21 is the length of the cathode side 4b1 of the first focusing electrode 401 in the tube axis direction, and L22 is the second length of the second focusing electrode 401. The length L3 of the focusing electrode 402 in the tube axis direction is the length of the intermediate portion 4c of the first focusing electrode 401 in the tube axis direction. Since the panel side portion 4a and the small diameter portion 4b2 of the second focusing electrode 402 each form an electronic lens, they have a length necessary to form an electronic lens. Also, the length L1 of the panel side 4a in the tube axis direction and the cathode side 4b1 of the first focusing electrode 401.
Is the length L2 of the intermediate portion 4c in the tube axis direction.
Since it is shorter than 3, distortion at both open ends of the focusing electrode can be reduced. The lengths L1, L21, L2
2, L3 has a relationship of L3> L1, L3> L21.

【００５７】この第１集束電極４０１において、パネル
側部４ａの径Ｄ１は中間部４ｃの径Ｄ３より大きく、か
つ陰極側部４ｂの径Ｄ２１の径はパネル側部４ａと陰極
側部４ｂを連接する中間部４ｃの径Ｄ３よりも小径とな
っている（Ｄ１＞Ｄ３＞Ｄ２１）。In the first focusing electrode 401, the diameter D1 of the panel side portion 4a is larger than the diameter D3 of the intermediate portion 4c, and the diameter D21 of the cathode side portion 4b connects the panel side portion 4a and the cathode side portion 4b. The diameter D3 is smaller than the diameter D3 of the intermediate portion 4c (D1>D3> D21).

【００５８】第２集束電極４０２において、第２集束電
極の径小部４ｂ２の径Ｄ２２は第１集束電極４０１の陰
極側部４ｂ１の径Ｄ２１と同径（Ｄ２１＝Ｄ２２）とな
っているが、電子銃の組立て方法に起因して第２集束電
極の径小部４ｂ２の径Ｄ２２を第１集束電極の陰極側部
４ｂ１の径Ｄ２１より小さく（Ｄ２１＞Ｄ２２）するこ
ともある。In the second focusing electrode 402, the diameter D22 of the small diameter portion 4b2 of the second focusing electrode is the same as the diameter D21 of the cathode side portion 4b1 of the first focusing electrode 401 (D21 = D22). Due to the method of assembling the electron gun, the diameter D22 of the small diameter portion 4b2 of the second focusing electrode may be smaller than the diameter D21 of the cathode side portion 4b1 of the first focusing electrode (D21> D22).

【００５９】例えば投写型テレビ受像機に用いられる陰
極線管では、Ｄ１は２０ｍｍ、Ｄ２は１０ｍｍ、Ｄ３は
１２ｍｍ、Ｌ１は１０ｍｍ、Ｌ２１は２ｍｍ、Ｌ２２は
１０ｍｍ、Ｌ３は３０ｍｍである。For example, in a cathode ray tube used for a projection type television receiver, D1 is 20 mm, D2 is 10 mm, D3 is 12 mm, L1 is 10 mm, L21 is 2 mm, L22 is 10 mm, and L3 is 30 mm.

【００６０】これらの集束電極を組立てる場合、前述し
た組立て用軸棒６０に接触する面をパネル側部４ａ、陰
極側部４ｂ１、径小部４ｂ２の内面とすることで容易に
組立て用軸棒と同軸にできる。さらに、第１集束電極４
０１の中間部４ｃの管軸方向長さを長くしたので、陰極
側部４ｂ１の軸方向長さＬ２１を短くできる。陰極側部
４ｂ１の内面は組立て用軸棒と接触することで第１集束
電極４０１の中心軸と組立て用軸棒の中心軸を一致させ
ている。そのため、陰極側部４ｂ１は、その内径が陰極
側部全域にわたって同じ径に形成され、組立て用軸棒の
中心軸と一致するように形成されなければならない。図
４の第１集束電極４０１は陰極側部４ｂ１を短くしてあ
るので、内径を厳密に制御する必要のある領域が狭く、
電極の製造が容易である。When assembling these focusing electrodes, the surfaces that come into contact with the assembling shaft 60 described above are easily formed as the inner surfaces of the panel side portion 4a, the cathode side portion 4b1, and the small diameter portion 4b2. Can be coaxial. Further, the first focusing electrode 4
The length L21 of the cathode side portion 4b1 in the axial direction can be shortened because the length of the intermediate portion 4c in the tube axis direction is increased. The inner surface of the cathode side portion 4b1 is in contact with the assembling rod so that the center axis of the first focusing electrode 401 and the assembling axis are aligned. Therefore, the cathode side part 4b1 must be formed so that the inner diameter thereof is the same over the entire area of the cathode side part and coincides with the center axis of the assembling rod. Since the first focusing electrode 401 in FIG. 4 has the cathode side portion 4b1 shortened, the area in which the inner diameter needs to be strictly controlled is narrow,
The electrode is easy to manufacture.

【００６１】上記実施例によれば、電極支持耐４１の取
り付け位置を、耐電圧を考慮して可能な限り第２陽極側
に配置することができる。これにより、第１集束電極４
０１は、全長が短く且つ電極支持体が第２陽極近傍に配
置できるので、電子銃を形成した後に電子銃に力が加わ
ったとしても、パネル側部４ａと第２陽極５ａの同軸度
の偏位を少なくできる。また、第１集束電極と第２集束
電極の間には電子レンズが形成されないので、第１集束
電極の同軸度の偏位は、第２陽極５だけに対して考慮す
ればよい。According to the above embodiment, the mounting position of the electrode supporting member 41 can be arranged as close to the second anode as possible in consideration of the withstand voltage. Thereby, the first focusing electrode 4
No. 01 has a short overall length and the electrode support can be arranged in the vicinity of the second anode. Therefore, even if a force is applied to the electron gun after the electron gun is formed, the coaxiality of the panel side 4a and the second anode 5a is deviated. The number of places can be reduced. Further, since no electron lens is formed between the first focusing electrode and the second focusing electrode, the deviation of the coaxiality of the first focusing electrode may be considered only for the second anode 5.

【００６２】なお、第２集束電極はその軸方向長さＬ２
２が短く、両端を丸めて補強した単一径であり、陽極側
部と比べて径が小さいので、変形しにくい。The second focusing electrode has an axial length L2
2 is short, has a single diameter with both ends rounded and reinforced, and has a smaller diameter than the anode side, so that it is not easily deformed.

【００６３】第１集束電極４０１は、陽極側部との間に
円周段差を有する中間部４ｃに電極支持体４１を設けた
ので、電子レンズを形成するパネル側部４ａを変形させ
ること無くビードガラスに電極を固着することができ
る。また組立てる際に高精度を必要とする陰極側部ｂ１
が短く、かつ中間部４ｃに電極支持体４１を設けたの
で、陰極側部４ｂ１の変形を抑制できる。The first focusing electrode 401 is provided with the electrode support 41 at the intermediate portion 4c having a circumferential step between the first focusing electrode 401 and the anode, so that the bead can be formed without deforming the panel side 4a forming the electron lens. The electrode can be fixed to the glass. In addition, the cathode side part b1 which requires high accuracy when assembling.
And the electrode support 41 is provided in the intermediate portion 4c, so that the deformation of the cathode side portion 4b1 can be suppressed.

【００６４】図５は本発明による陰極線管用電子銃の第
３実施例を示す一部断面図であって、電極の中心軸Ｚの
上側が断面図、下側が側面図である。FIG. 5 is a partial sectional view showing a third embodiment of the electron gun for a cathode ray tube according to the present invention. The upper part of the center axis Z of the electrode is a sectional view, and the lower part is a side view.

【００６５】電子銃は管軸方向に伸び且つ陰極側部と中
間部とパネル側部とで異なる３つの径をもつ筒状の集束
電極を有し、第２陽極内に集束電極のパネル側部を挿入
して主レンズ部を形成している。第３実施例では集束電
極を２分割し、陽極側の集束電極に段差を２個所設け、
電子レンズが形成されず且つ最終段電極である陽極から
離れた陰極側部に電極支持体を設けた。The electron gun has a cylindrical focusing electrode extending in the tube axis direction and having three different diameters at the cathode side portion, the intermediate portion, and the panel side portion. To form the main lens portion. In the third embodiment, the focusing electrode is divided into two, and the focusing electrode on the anode side is provided with two steps,
An electrode support was provided on the side of the cathode away from the anode, which was the final stage electrode, without forming an electron lens.

【００６６】図５において、前記図４と同一符号は同一
機能部分に対応する。In FIG. 5, the same reference numerals as those in FIG. 4 correspond to the same functional parts.

【００６７】集束電極４は陽極側の第１集束電極４０１
と陰極側の第２集束電極４０２とに分割されており、陰
極側部４ｂにギャップＶＭを形成して分割している。４
ｂ１は第１集束電極の陰極側部である。The focusing electrode 4 is a first focusing electrode 401 on the anode side.
And a second focusing electrode 402 on the cathode side, and are divided by forming a gap VM on the cathode side 4b. 4
b1 is the cathode side of the first focusing electrode.

【００６８】第１集束電極４０１は、パネル側部４ａと
陰極側部４ｂ１および中間部４ｃを絞り加工により単一
の電極部品として製作したものであり、第２集束電極４
０２は円筒状の単一電極部品として製作されたものであ
る。集束電極４は第１集束電極４０１の陰極側部４ｂ１
と第２集束電極との開口端縁を対向させ、両者を接続部
材４２で電気的に接続したものである。The first focusing electrode 401 is one in which the panel side portion 4a, the cathode side portion 4b1, and the intermediate portion 4c are manufactured as a single electrode component by drawing, and the second focusing electrode 401 is formed.
02 is manufactured as a cylindrical single electrode part. The focusing electrode 4 is a cathode side portion 4b1 of the first focusing electrode 401.
The opening edges of the first focusing electrode and the second focusing electrode are opposed to each other, and both are electrically connected by the connecting member 42.

【００６９】ギャップＶＭを設けることにより、集束電
極４の電極長を変えること無く、電極部品（第１集束電
極４０１、第２集束電極４０２）を短くできるので、各
電極部品の変形を少なくできる。またネック部外面にお
いてギャップＶＭの近傍に速度変調コイルを配置するこ
とにより、コントラストが向上し、高品質の画像を得る
ことができる。By providing the gap VM, the electrode components (the first focusing electrode 401 and the second focusing electrode 402) can be shortened without changing the electrode length of the focusing electrode 4, so that the deformation of each electrode component can be reduced. Further, by disposing the velocity modulation coil near the gap VM on the outer surface of the neck portion, the contrast is improved, and a high-quality image can be obtained.

【００７０】また図５において、Ｌ１は集束電極４のパ
ネル側部４ａの管軸方向の長さ、Ｌ２１は第１集束電極
４０１の陰極側部４ｂ１の管軸方向の長さ、Ｌ２２は第
２集束電極４０２の径小部４ｂ２の管軸方向の長さ、Ｌ
３は第１集束電極４０１の中間部４ｃの管軸方向の長さ
である。パネル側部４ａと第２集束電極４０２は夫々電
子レンズを形成するので、電子レンズを形成するために
必要な長さをもっている。パネル側部４ａの管軸方向の
長さＬ１と第１集束電極４０１の陰極側部４ｂ１の管軸
方向の長さＬ２を中間部４ｃの管軸方向の長さＬ３より
短くしているので、集束電極の両開口端の歪みを少なく
できる。なお、上記各長さＬ１、Ｌ２１、Ｌ２２、Ｌ３
は、Ｌ３＞Ｌ１，Ｌ３＞Ｌ２１の関係にある。In FIG. 5, L1 is the length in the tube axis direction of the panel side 4a of the focusing electrode 4, L21 is the length in the tube axis direction of the cathode side 4b1 of the first focusing electrode 401, and L22 is the second length. The length of the small diameter portion 4b2 of the focusing electrode 402 in the tube axis direction, L
Reference numeral 3 denotes a length of the intermediate portion 4c of the first focusing electrode 401 in the tube axis direction. Since the panel side portion 4a and the second focusing electrode 402 each form an electronic lens, they have a length necessary to form an electronic lens. Since the length L1 of the panel side portion 4a in the tube axis direction and the length L2 of the first focusing electrode 401 in the tube side direction of the cathode side portion 4b1 are shorter than the length L3 of the intermediate portion 4c in the tube axis direction, Distortion at both open ends of the focusing electrode can be reduced. In addition, each said length L1, L21, L22, L3
Are in a relationship of L3> L1, L3> L21.

【００７１】この第１集束電極４０１において、パネル
側部４ａの内径Ｄ１は中間部４ｃの内径Ｄ３より大き
く、かつ陰極側部４ｂの内径Ｄ２１の内径はパネル側部
４ａと陰極側部４ｂを連接する中間部４ｃの径Ｄ３より
も小径となっている（Ｄ１＞Ｄ３＞Ｄ２１）。In the first focusing electrode 401, the inside diameter D1 of the panel side 4a is larger than the inside diameter D3 of the intermediate part 4c, and the inside diameter D21 of the cathode side 4b connects the panel side 4a and the cathode side 4b. The diameter D3 is smaller than the diameter D3 of the intermediate portion 4c (D1>D3> D21).

【００７２】第２集束電極４０２において、第２集束電
極の内径Ｄ２２は第１集束電極４０１の陰極側部４ｂ１
の径Ｄ２１と同径（Ｄ２１＝Ｄ２２）となっているが、
電子銃の組立て方法に起因して第２集束電極の内径Ｄ２
２を第１集束電極の陰極側部４ｂ１の径Ｄ２１より小さ
く（Ｌ２１＞Ｌ２２）することもできる。In the second focusing electrode 402, the inner diameter D22 of the second focusing electrode is the cathode side 4b1 of the first focusing electrode 401.
Is the same as the diameter D21 (D21 = D22),
Due to the method of assembling the electron gun, the inner diameter D2 of the second focusing electrode
2 may be smaller than the diameter D21 of the cathode side portion 4b1 of the first focusing electrode (L21> L22).

【００７３】例えば投写型テレビ受像機に用いられる陰
極線管では、Ｄ１は２０ｍｍ、Ｄ２は１０ｍｍ、Ｄ３は
１２ｍｍ、Ｌ１は１０ｍｍ、Ｌ２１は１０ｍｍ、Ｌ２２
は１０ｍｍ、Ｌ３は２２ｍｍである。For example, in a cathode ray tube used for a projection type television receiver, D1 is 20 mm, D2 is 10 mm, D3 is 12 mm, L1 is 10 mm, L21 is 10 mm, L22.
Is 10 mm and L3 is 22 mm.

【００７４】第１集束電極４０１は、パネル側部との間
に円周段差を２つ介した陰極側部４ｂ１に電極支持体４
１を設けたので、主レンズを形成する陽極側部変形させ
ること無くビードガラスに電極を固着することができ
る。The first focusing electrode 401 is provided on the cathode side 4b1 with two circumferential steps between the electrode support and the panel support.
Since the electrode 1 is provided, the electrode can be fixed to the bead glass without deforming the side of the anode forming the main lens.

【００７５】更に電極支持体４１を陰極側部４ｂ１の中
間部４ｃ近傍（段差の近傍）に配置することにより、よ
り第１集束電極４０１の変形を抑制できる。Further, by disposing the electrode support 41 near the intermediate portion 4c (near the step) of the cathode side portion 4b1, the deformation of the first focusing electrode 401 can be further suppressed.

【００７６】また、通常、電極は、電極の開口端を丸め
ることで、放電を抑制し、また電極の補強をしている。
しかしながら、このような電子銃において、陽極は開口
端を丸めておらず、放電の可能がある。本実施例によれ
ば、最も電圧の高い陽極から電極支持体４１を離すこと
で陽極５と集束電極４との放電を抑制することができ
る。In general, the electrode is formed by rounding the opening end of the electrode to suppress discharge and reinforce the electrode.
However, in such an electron gun, the anode does not have a rounded open end, and may discharge. According to the present embodiment, the discharge between the anode 5 and the focusing electrode 4 can be suppressed by separating the electrode support 41 from the anode having the highest voltage.

【００７７】なお、第２集束電極はその軸方向長さＬ２
２が短く、両端を丸めて補強した単一径であり、陽極側
部と比べて径が小さいので、変形しにくい。The second focusing electrode has an axial length L2
2 is short, has a single diameter with both ends rounded and reinforced, and has a smaller diameter than the anode side, so that it is not easily deformed.

【００７８】図６は本発明による陰極線管用電子銃の第
４実施例を示す一部断面図であって、電極の中心軸Ｚの
上側が断面図、下側が側面図である。第４実施例では集
束電極を２分割し、陰極側の集束電極に段差を設け、電
子レンズの形成されない陰極側部に電極支持体を設け
た。FIG. 6 is a partial sectional view showing a fourth embodiment of the electron gun for a cathode ray tube according to the present invention. The upper part of the center axis Z of the electrode is a sectional view, and the lower part is a side view. In the fourth embodiment, the focusing electrode was divided into two parts, a step was provided in the focusing electrode on the cathode side, and an electrode support was provided on the cathode side where no electron lens was formed.

【００７９】図６において、前記図１と同一符号は同一
機能部分に対応する。In FIG. 6, the same reference numerals as those in FIG. 1 correspond to the same functional parts.

【００８０】集束電極４は陽極側の第１集束電極４０１
と陰極側の第２集束電極４０２とに分割されており、陰
極側部４ｂにギャップＶＭを形成して分割している。４
ｂ１は第１集束電極４０１の陰極側部であり、４ｂ２は
第２集束電極４０２の径小部（陰極側部）である。The focusing electrode 4 is a first focusing electrode 401 on the anode side.
And a second focusing electrode 402 on the cathode side, and are divided by forming a gap VM on the cathode side 4b. 4
b1 is a cathode side portion of the first focusing electrode 401, and 4b2 is a small diameter portion (cathode side portion) of the second focusing electrode 402.

【００８１】第２集束電極４０２は、径大部４ｂ３と径
小部４ｂ２を絞り加工により単一の電極部品として製作
したものである。集束電極４は、第１集束電極４０１の
陰極側部４ｂ１と第２集束電極４０２の径小部４ｂ２と
の開口端縁を対向させ、両者を接続部材４２で電気的に
接続したものである。The second focusing electrode 402 is formed by drawing the large-diameter portion 4b3 and the small-diameter portion 4b2 as a single electrode component. In the focusing electrode 4, the opening edges of the cathode side 4 b 1 of the first focusing electrode 401 and the small-diameter portion 4 b 2 of the second focusing electrode 402 are opposed to each other, and both are electrically connected by the connecting member 42.

【００８２】ギャップＶＭを設けることにより、集束電
極４の電極長を変えること無く、電極部品（第１集束電
極４０１、第２集束電極４０２）を短くできるので、各
電極部品の変形を少なくできる。またネック部外面にお
いてギャップＶＭの近傍に速度変調コイルを配置するこ
とにより、容易にコントラストが向上し、高品質の画像
を得ることができる。By providing the gap VM, the electrode components (the first focusing electrode 401 and the second focusing electrode 402) can be shortened without changing the electrode length of the focusing electrode 4, so that the deformation of each electrode component can be reduced. Further, by disposing the velocity modulation coil near the gap VM on the outer surface of the neck portion, the contrast can be easily improved, and a high-quality image can be obtained.

【００８３】また図６の第２集束電極４０２において第
２集束電極の径小部４ｂ２の径は第１集束電極４０１の
陰極側部４ｂ１の径と同径となっているが、電子銃の組
立て方法に起因して第２集束電極の径小部４ｂ２の径を
第１集束電極の陰極側部４ｂ１の径より小さくすること
もできる。In the second focusing electrode 402 shown in FIG. 6, the diameter of the small diameter portion 4b2 of the second focusing electrode is the same as the diameter of the cathode side portion 4b1 of the first focusing electrode 401. Due to the method, the diameter of the small diameter portion 4b2 of the second focusing electrode can be made smaller than the diameter of the cathode side portion 4b1 of the first focusing electrode.

【００８４】さらに第２集束電極４０２は陰極側に径大
部４ｂ３を有している。径大部４ｂ３は向い合う陰極側
に位置する電極（図示していない）と電子レンズを形成
する。この電子レンズの口径を大きくするために、第２
集束電極４０２の径大部４ｂ３の径Ｄ２２は径小部４ｂ
２の径よりも大きくしてある。Further, the second focusing electrode 402 has a large-diameter portion 4b3 on the cathode side. The large-diameter portion 4b3 forms an electron lens with an electrode (not shown) located on the opposite side of the cathode. To increase the aperture of this electron lens, the second
The diameter D22 of the large diameter portion 4b3 of the focusing electrode 402 is equal to the small diameter portion 4b.
It is larger than the diameter of 2.

【００８５】第２集束電極４０２は、径大部４ｂ３との
間に円周段差を設けた径小部４ｂ２に電極支持体４１を
設けたので、電子レンズを形成する径大部４ｂ３を変形
させること無くビードガラスに電極を固着することがで
きる。Since the electrode support 41 is provided on the small diameter portion 4b2 having a circumferential step between the second focusing electrode 402 and the large diameter portion 4b3, the large diameter portion 4b3 forming the electron lens is deformed. The electrode can be fixed to the bead glass without any problem.

【００８６】なお、本実施例を第２実施例または第３実
施例に適用することで各実施例の効果を得ることができ
る。また本実施例を実施例１に適用することも可能であ
る。By applying this embodiment to the second or third embodiment, the effects of each embodiment can be obtained. This embodiment can be applied to the first embodiment.

【００８７】図７は本発明による陰極線管用電子銃の第
５実施例の全体構造を説明する側面図であって、Ｋは陰
極、１は第１電極（制御電極）、２は第２電極（加速電
極）、３は第３電極（第１陽極）、４３は第４電極（集
束電極）、４１は集束電極４３の電極支持体、５は最終
電極である第５電極（第２陽極）、６は絶縁支持体（ビ
ードガラス）である。なお、符号１１，２１，３１，５
１は第１電極１、第２電極２、第３電極３、第５電極５
の電極支持体である。FIG. 7 is a side view for explaining the overall structure of a fifth embodiment of the electron gun for a cathode ray tube according to the present invention, wherein K is a cathode, 1 is a first electrode (control electrode), and 2 is a second electrode ( An accelerating electrode), 3 is a third electrode (first anode), 43 is a fourth electrode (focusing electrode), 41 is an electrode support of the focusing electrode 43, 5 is a fifth electrode (second anode) as a final electrode, Reference numeral 6 denotes an insulating support (bead glass). Reference numerals 11, 21, 31, 5
1 is a first electrode 1, a second electrode 2, a third electrode 3, a fifth electrode 5
Electrode support.

【００８８】前記図１７と同一符号は同一機能部分に対
応し、主レンズ部は第５電極（円筒状の第２陽極）５と
第５電極５に管軸方向で対向する第４電極（円筒状の集
束電極）４３とで構成してなる。The same reference numerals as those in FIG. 17 correspond to the same functional portions, and the main lens portion has a fifth electrode (cylindrical second anode) 5 and a fourth electrode (cylindrical) opposed to the fifth electrode 5 in the tube axis direction. Focusing electrode 43).

【００８９】同図において、第１電極１〜第５電極５
は、それぞれ単一の径または２種以上の径をもつ円筒状
または板状の電極からなり、それぞれの電極を管軸に沿
って整列させている。電極を整列させた状態で、軟化さ
せた一対の絶縁支持体６を、管軸に対して横方向から押
圧し、各電極に形成した電極支持体１１，２１，３１，
４１，５１を絶縁支持体に埋設することにより固定され
る。In the figure, the first to fifth electrodes 5 to 5
Consists of cylindrical or plate-like electrodes each having a single diameter or two or more diameters, and the electrodes are aligned along the tube axis. In a state where the electrodes are aligned, a pair of softened insulating supports 6 are pressed laterally with respect to the tube axis to form electrode supports 11, 21, 31, and
It is fixed by embedding 41 and 51 in an insulating support.

【００９０】図８は本発明による陰極線管用電子銃に用
いられる電極の第５実施例を示す一部断面図であって、
電極の中心軸Ｚの上側が断面図、下側が側面図である。FIG. 8 is a partial sectional view showing a fifth embodiment of the electrode used in the electron gun for a cathode ray tube according to the present invention.
The upper side of the center axis Z of the electrode is a sectional view, and the lower side is a side view.

【００９１】同図において、４３は集束電極、４３ａは
集束電極４３の最終電極（第２陽極）と対向する端縁に
形成した陽極側筒状部、４３ｂは集束電極４３の第３電
極と対向する端縁に形成した陰極側筒状部、４３ｃは中
間部、４１は電極支持体である。In the same figure, reference numeral 43 denotes a focusing electrode; 43a, an anode-side tubular portion formed at the edge of the focusing electrode 43 facing the final electrode (second anode); 43b, facing the third electrode of the focusing electrode 43; Reference numeral 43c denotes an intermediate portion, and reference numeral 41 denotes an electrode support.

【００９２】同図において、集束電極４３は、陽極側筒
状部４３ａと陰極側筒状部４３ｂおよび中間部４３ｃを
単一の電極部品として製作したものである。In the figure, the focusing electrode 43 is one in which the anode-side tubular portion 43a, the cathode-side tubular portion 43b, and the intermediate portion 43c are manufactured as a single electrode part.

【００９３】この実施例では集束電極４３は、陽極側筒
状部４３ａの径Ｄ１が陰極側筒状部４３ｂの径Ｄ２より
大であり、かつ陽極側筒状部４３ａと陰極側筒状部４３
ｂを連接する中間部４３ｃの径Ｄ３は上記陽極側筒状部
４３ａと陰極側筒状部４３ｂよりも小径となっている
（Ｄ１＞Ｄ２＞Ｄ３）。なお、上記陽極側筒状部４３ａ
の径Ｄ１と陰極側部４ｂの径Ｄ２とは同径（Ｄ１＝Ｄ２
＞Ｄ３）としてもよい。In this embodiment, the focusing electrode 43 has a configuration in which the diameter D1 of the anode-side tubular portion 43a is larger than the diameter D2 of the cathode-side tubular portion 43b, and the anode-side tubular portion 43a and the cathode-side tubular portion 43a.
The diameter D3 of the intermediate portion 43c that connects b is smaller than the diameters of the anode-side tubular portion 43a and the cathode-side tubular portion 43b (D1>D2> D3). The anode-side cylindrical portion 43a
Is equal to the diameter D1 of the cathode side portion 4b (D1 = D2
> D3).

【００９４】上記陽極側筒状部４３ａは前記図７で説明
した電子銃の陽極５と対向して（向い合って）主レンズ
を形成する。この陽極側筒状部４３ａと陰極側筒状部４
３ｂは高精度を必要とするが、中間部４３ｃの部分は陽
極側筒状部４３ａと陰極側筒状部４３ｂを連結する機能
を有するものであることから、さ程精度を要求されな
い。The anode-side cylindrical portion 43a forms a main lens facing (facing) the anode 5 of the electron gun described with reference to FIG. The anode-side tubular portion 43a and the cathode-side tubular portion 4
Although 3b requires high accuracy, the intermediate portion 43c has a function of connecting the anode-side cylindrical portion 43a and the cathode-side cylindrical portion 43b, and therefore does not require much accuracy.

【００９５】そして、この中間部４３ｃの管軸方向長さ
を長くし、陽極側筒状部４３ａと陰極側筒状部４３ｂの
管軸方向長さを短くすることで主レンズを構成する集束
電極４３として、高精度の製作が容易になる。Then, the length of the intermediate portion 43c in the tube axis direction is increased, and the lengths of the anode-side tubular portion 43a and the cathode-side tubular portion 43b in the tube axial direction are shortened to form a focusing electrode constituting the main lens. As 43, high-precision manufacturing is facilitated.

【００９６】そして、この集束電極４３をビードガラス
に固定するための電極支持体４１を中間部４３ｃに溶接
した。これにより、電子銃の組み立て工程において、加
熱軟化させたビードガラスに電極支持体４１を押圧して
埋設する際に当該電極に生じる変形は、陽極側筒状部４
３ａあるいは陰極側筒状部４３ｂと中間部４３ｃの境界
に形成される段差によって、上記陽極側筒状部４３ａあ
るいは陰極側筒状部４３ｂに影響しない。したがって、
上記陽極側筒状部４３ａあるいは陰極側筒状部４３ｂの
精度が維持される。Then, the electrode support 41 for fixing the focusing electrode 43 to the bead glass was welded to the intermediate portion 43c. Thereby, in the assembling process of the electron gun, when the electrode support 41 is pressed and buried in the heat-softened bead glass, deformation of the electrode is caused by the deformation of the anode-side cylindrical portion 4.
The step 3a or the step formed at the boundary between the cathode-side tubular portion 43b and the intermediate portion 43c does not affect the anode-side tubular portion 43a or the cathode-side tubular portion 43b. Therefore,
The accuracy of the anode-side tubular portion 43a or the cathode-side tubular portion 43b is maintained.

【００９７】この実施例によっても、高精度の電子銃を
高い量産性で製造することができ、高画質の陰極線管を
提供できる。According to this embodiment, a high-precision electron gun can be manufactured with high mass productivity, and a high-quality cathode ray tube can be provided.

【００９８】図９は本発明による陰極線管用電子銃の第
６実施例を構成する集束電極を説明する一部断面した側
面図であって、前記図７に示した構造の電子銃に適用す
る電極である。FIG. 9 is a partially sectional side view illustrating a focusing electrode constituting a sixth embodiment of the electron gun for a cathode ray tube according to the present invention, and is an electrode applied to the electron gun having the structure shown in FIG. It is.

【００９９】同図において、図８に同じ作用を有する部
位には同一番号を付してある。集束電極４３は陽極５対
向する陽極側筒状部４３ａをもつ第１集束電極４３１
と、第３電極３に対向する陰極側筒状部４３ｂを持つ第
２集束電極４３２とに分割されている。In the same figure, parts having the same action as in FIG. 8 are denoted by the same reference numerals. The focusing electrode 43 is a first focusing electrode 431 having an anode-side cylindrical portion 43a facing the anode 5.
And a second focusing electrode 432 having a cathode-side tubular portion 43b facing the third electrode 3.

【０１００】４３ｃ１は陽極側筒状部４３ａに連接する
第１中間部、４３ｃ２は陰極側筒状部４３ｂに連接する
第２中間部、４１ａは第１中間部４３ｃ１に設置された
電極支持体、４１ｂは第２中間部４３ｃ２に設置された
電極支持体、４２は第１集束電極４３１と第２集束電極
４３２とを電気的に接続する接続部材である。43c1 is a first intermediate portion connected to the anode-side cylindrical portion 43a, 43c2 is a second intermediate portion connected to the cathode-side cylindrical portion 43b, 41a is an electrode support installed on the first intermediate portion 43c1, Reference numeral 41b denotes an electrode support provided on the second intermediate portion 43c2, and reference numeral 42 denotes a connection member for electrically connecting the first focusing electrode 431 and the second focusing electrode 432.

【０１０１】同図において、集束電極４は、陽極側筒状
部４３ａと第１中間部４３ｃ１とを単一の電極部品とし
て製作し、また陰極側筒状部４３ｂと第２中間部４３ｃ
２を単一の電極部品として製作し、上記第１中間部４３
ｃ１と第２中間部４３ｃ２の開口端縁を対向させ、両者
を接続部材４２で電気的に接続したものである。In the figure, the focusing electrode 4 is manufactured by forming the anode-side cylindrical portion 43a and the first intermediate portion 43c1 as a single electrode component, and the cathode-side cylindrical portion 43b and the second intermediate portion 43c.
2 as a single electrode part, and the first intermediate portion 43
c1 and the opening edge of the second intermediate portion 43c2 are opposed to each other, and both are electrically connected by the connecting member 42.

【０１０２】この集束電極４３において、陽極側筒状部
４３ａの径Ｄ１は陰極側筒状部４３ｂの径Ｄ２より大き
く、かつ陽極側筒状部４３ａと陰極側筒状部４３ｂを連
接する第１中間部４３ｃ１と第２中間部４３ｃ２の径Ｄ
３ａとＤ３ｂは上記陽極側筒状部４３ａと陰極側筒状部
４３ｂよりも小径となっている（Ｄ１＞Ｄ２＞Ｄ３ａ，
Ｄ３ｂ）が、陽極側筒状部４３ａの径Ｄ１と陰極側筒状
部４３ｂの径Ｄ２とは同径であってもよい（Ｄ１＝Ｄ２
＞Ｄ３ａ，Ｄ３ｂ）。In the focusing electrode 43, the diameter D1 of the anode-side cylindrical portion 43a is larger than the diameter D2 of the cathode-side cylindrical portion 43b, and the first connecting portion 43 connects the anode-side cylindrical portion 43a and the cathode-side cylindrical portion 43b. Diameter D of intermediate portion 43c1 and second intermediate portion 43c2
3a and D3b have smaller diameters than the anode-side tubular portion 43a and the cathode-side tubular portion 43b (D1>D2> D3a,
D3b) may be the same as the diameter D1 of the anode-side tubular portion 43a and the diameter D2 of the cathode-side tubular portion 43b (D1 = D2).
> D3a, D3b).

【０１０３】上記陽極側筒状部４３ａは前記図７で説明
した電子銃の陽極５に対向して主レンズを形成する。こ
の陽極側筒状部４３ａと陰極側の電極と対向する陰極側
筒状部４３ｂは高精度を必要とするが、第１中間部４３
ｃ１と第２中間部４３ｃ２の部分は陽極側筒状部４３ａ
と陰極側筒状部４３ｂを連結する機能を有するものであ
ることから、さ程精度を要求されない。The anode-side cylindrical portion 43a forms a main lens facing the anode 5 of the electron gun described with reference to FIG. The anode-side tubular portion 43a and the cathode-side tubular portion 43b facing the cathode-side electrode require high accuracy, but the first intermediate portion 43
c1 and the second intermediate portion 43c2 are the anode-side cylindrical portion 43a
Since it has a function of connecting the cathode-side cylindrical portion 43b to the cathode-side cylindrical portion 43b, the accuracy is not required so much.

【０１０４】第１集束電極４３１と第２集束電極４３２
に形成された段差は夫々１つなので容易に製造できる。
さらに第１集束電極４３１と第２集束電極４３２とが同
形であれば、集束電極４３は容易に量産できる。The first focusing electrode 431 and the second focusing electrode 432
Can be easily manufactured because there is only one step formed in each step.
Furthermore, if the first focusing electrode 431 and the second focusing electrode 432 have the same shape, the focusing electrode 43 can be easily mass-produced.

【０１０５】そして、この第１中間部４３ｃ１と第２中
間部４３ｃ２の管軸方向長さを長くし、陽極側筒状部４
３ａと陽極側筒状部４３ｂを短くすることで、陽極側筒
状部４３ａと陽極側筒状部４３ｂの変形を抑制でき、容
易に高精度の集束電極４３を製作することができる。The first intermediate portion 43c1 and the second intermediate portion 43c2 are made longer in the tube axis direction, so that the anode-side cylindrical portion 4 is formed.
By shortening 3a and anode-side tubular portion 43b, deformation of anode-side tubular portion 43a and anode-side tubular portion 43b can be suppressed, and highly accurate focusing electrode 43 can be easily manufactured.

【０１０６】そして、この電極をビードガラスに固定す
るための電極支持体４１ａと４１ｂを第１中間部４３ｃ
１と第２中間部４３ｃ２に溶接してビードガラスに埋設
固定することで、電子銃組み立て工程で加熱軟化させた
ビードガラスに電極支持体４１ａと４１ｂを押圧して埋
設する際に当該電極に生じる変形は、陽極側筒状部４３
ａあるいは陰極側筒状部４３ｂと第１中間部４３ｃ１と
第２中間部４３ｃ２の各境界に形成される円周段差によ
って上記陽極側筒状部４３ａあるいは陰極側筒状部４３
ｂに及ばない。したがって、レンズ精度に影響する上記
各陽極側部の精度が維持される。Then, the electrode supports 41a and 41b for fixing the electrodes to the bead glass are connected to the first intermediate portion 43c.
By welding to the first and second intermediate portions 43c2 and burying and fixing the same in the bead glass, the electrode supports 41a and 41b are pressed and buried in the bead glass heated and softened in the electron gun assembling step, and are generated in the electrodes. The deformation is the anode-side tubular portion 43
a or the anode-side tubular portion 43a or the cathode-side tubular portion 43 due to a circumferential step formed at each boundary between the cathode-side tubular portion 43b, the first intermediate portion 43c1, and the second intermediate portion 43c2.
less than b. Therefore, the accuracy of each of the anode side portions, which affects the lens accuracy, is maintained.

【０１０７】この実施例によっても、高精度の電子銃を
高い量産性で製造することができ、高画質の陰極線管を
提供できる。According to this embodiment, a high-precision electron gun can be manufactured with high mass productivity, and a high-quality cathode ray tube can be provided.

【０１０８】図１０は図４、図５、図６、図９に示した
ギャップＶＭを有する電極を備えた電子銃を、陰極線管
のネック部に配置した図である。このときギャップＶＭ
に対応するネック部の外側に速度変調コイル９０を配置
してある。この速度変調コイル９０は電子ビームの走査
速度を変化させることにより、容易にコントラストを向
上させる技術である。このような技術を開示した文献と
して、特公昭６２−２１２１６号公報がある。FIG. 10 is a view in which the electron gun provided with the electrodes having the gaps VM shown in FIGS. 4, 5, 6, and 9 is arranged at the neck of the cathode ray tube. At this time, the gap VM
The velocity modulation coil 90 is arranged outside the neck portion corresponding to the above. The speed modulation coil 90 is a technique for easily improving the contrast by changing the scanning speed of the electron beam. As a document disclosing such a technique, there is Japanese Patent Publication No. 62-21216.

【０１０９】上記実施例の集束電極は管軸方向への長さ
が長いため、ギャップＶＭを設けて管軸方向への長さを
短くすることは、電極の変形を防ぐことができる。また
ネック部外面において、ギャップＶＭ近傍に速度変調コ
イル９０を配置することで、容易にコントラストがはっ
きりし、高品質の画像を得ることができる。このときギ
ャップＶＭの中心と速度変調コイル９０の中心を一致さ
せて配置することで、電子ビームは効率良く速度変調コ
イル９０の作用を受ける。Since the focusing electrode in the above embodiment has a long length in the tube axis direction, providing the gap VM and shortening the length in the tube axis direction can prevent deformation of the electrode. Further, by disposing the velocity modulation coil 90 near the gap VM on the outer surface of the neck portion, the contrast can be easily made clear and a high-quality image can be obtained. At this time, by arranging the center of the gap VM and the center of the speed modulation coil 90 so as to coincide with each other, the electron beam receives the action of the speed modulation coil 90 efficiently.

【０１１０】図１１は本発明による陰極線管用電子銃を
用いた陰極線管の構造例を説明する投写型陰極線管の部
分断面図であって、７１はパネル部、７１ａは蛍光面、
７２はネック部、７３はファンネル部、７４は電子銃、
７５はステム、７６は内部導電膜、７７は偏向装置、７
８はコンバーゼンスコイル、７９はセンタリング調整マ
グネット、図１と同一符号は同一部分に対応する。FIG. 11 is a partial sectional view of a projection type cathode ray tube for explaining a structural example of a cathode ray tube using the electron gun for a cathode ray tube according to the present invention, wherein 71 is a panel portion, 71a is a fluorescent screen,
72 is a neck portion, 73 is a funnel portion, 74 is an electron gun,
75 is a stem, 76 is an internal conductive film, 77 is a deflection device, 7
8 is a convergence coil, 79 is a centering adjustment magnet, and the same reference numerals as those in FIG.

【０１１１】同図において、パネル部７１の内面には蛍
光面７１ａが形成され、電子銃７４はネック部７２に設
置されている。電子銃７４は内部導電膜７６から陽極電
圧が導入され、ステム７５に引き出したピンから所要の
電圧と画像信号が供給される。In the figure, a fluorescent screen 71 a is formed on the inner surface of the panel section 71, and an electron gun 74 is installed on the neck section 72. The anode voltage of the electron gun 74 is introduced from the internal conductive film 76, and a required voltage and an image signal are supplied from a pin drawn to the stem 75.

【０１１２】電子銃７４から発射された電子ビームは偏
向装置７７による磁界で蛍光面７１ａを走査して画像を
再生する。The electron beam emitted from the electron gun 74 scans the fluorescent screen 71a with a magnetic field from the deflecting device 77 to reproduce an image.

【０１１３】この陰極線管によれば、パネル部７１に再
生した高画質の画像を図示しないスクリーン上に投写し
て再生することができる。According to this cathode ray tube, a high quality image reproduced on the panel section 71 can be projected and reproduced on a screen (not shown).

【０１１４】図１２は本発明による電子銃を組み込んだ
陰極線管を用いた投写型テレビ受像機の一例を説明する
正面図である。FIG. 12 is a front view for explaining an example of a projection television receiver using a cathode ray tube incorporating an electron gun according to the present invention.

【０１１５】また、図１３は図１２に示した投写型テレ
ビ受像機の内部構造例を説明する断面模式図である。FIG. 13 is a schematic sectional view for explaining an example of the internal structure of the projection type television receiver shown in FIG.

【０１１６】図１２および図１３に示したように、投写
型陰極線管８１のパネル部に形成された映像は、当該パ
ネル部にコネクタ８２を介して設置された投射光学系８
３で拡大されてミラー８４を介してスクリーン８０に投
写される。As shown in FIGS. 12 and 13, an image formed on the panel portion of the projection type cathode ray tube 81 is reflected by the projection optical system 8 provided on the panel portion via a connector 82.
The image is enlarged at 3 and projected on the screen 80 via the mirror 84.

【０１１７】このような投写型テレビ受像機によれば、
例えば４０型以上の大画面の映像を高画質で再現でき
る。According to such a projection type television receiver,
For example, a large screen image of 40 inches or more can be reproduced with high image quality.

【０１１８】以上の実施例では、最も精度良く形成され
なければならない集束電極４３と陽極５について説明し
た。In the above embodiment, the focusing electrode 43 and the anode 5 which must be formed with the highest accuracy have been described.

【０１１９】図１８は電子銃を組立てるときの集束電極
近傍の一部断面図である。６０は電子銃を組立てるとき
に用いられる組立て用軸棒（マウントピン）、６１は電
極の間隔を決定するスペーサ、４は集束電極、５は第２
陽極、Ｚは各電極及び組立て用軸棒６０の中心軸であ
る。組立て用軸棒６０の中心軸と各電極の中心軸は一致
するように組立てられる。組立て用軸棒６０はの径は、
第２陽極近傍で最も大きく、陰極側に近づくに従い順次
小さくなっている。電極の内面と組立て用軸棒の外面が
略々同径となることでそれぞれの中心軸を一致さてい
る。FIG. 18 is a partial sectional view near the focusing electrode when assembling the electron gun. Reference numeral 60 denotes an assembly rod (mount pin) used when assembling the electron gun, 61 denotes a spacer for determining the electrode interval, 4 denotes a focusing electrode, and 5 denotes a second electrode.
The anode, Z, is the central axis of each electrode and the assembly shaft 60. The assembly is performed so that the center axis of the assembly shaft 60 and the center axis of each electrode coincide with each other. The diameter of the assembling rod 60 is
It is largest near the second anode, and gradually decreases as approaching the cathode side. Since the inner surface of the electrode and the outer surface of the assembling rod have substantially the same diameter, their respective central axes coincide with each other.

【０１２０】上記実施例の集束電極を図１８に示したよ
うな電子銃組立て方法に適用することで、精度の良い電
子銃が容易に形成することが可能となる。By applying the focusing electrode of the above embodiment to an electron gun assembling method as shown in FIG. 18, an accurate electron gun can be easily formed.

【０１２１】[0121]

【発明の効果】電子ビームは制御電極、加速電極を通過
して徐々にその径が大きくなり、その後電子ビームは主
レンズにより集束作用を受けて蛍光面上に集束する。電
子ビームは、その径が大きい状態で集束電極４と第１陽
極で形成される電子レンズに入射する。そのため集束電
極４と第１陽極とで形成される電子レンズは高精度が要
求される。本発明とすることで高精度の電子レンズを形
成できる。The electron beam passes through the control electrode and the acceleration electrode and gradually increases in diameter. Thereafter, the electron beam is focused by the main lens and focused on the phosphor screen. The electron beam enters the electron lens formed by the focusing electrode 4 and the first anode in a state where the diameter of the electron beam is large. Therefore, the electron lens formed by the focusing electrode 4 and the first anode requires high accuracy. According to the present invention, a highly accurate electron lens can be formed.

【０１２２】本発明によれば、電子銃の主レンズを構成
する集束電極は、その大径部と径小部の間に精度をさ程
必要としない中間部を有する。そして、中間部を径大部
または径小部より長くする、中間部に絶縁支持体に埋設
固定する電極支持体を取付ける、管軸方向に対向する円
筒電極の両端縁に連接する径小部を設けることで、電子
銃組み立てに伴う電子レンズ（主レンズ）形成部分の変
形を抑制して電子ビームの収束特性の劣化が抑制され、
組み立て作業を容易にして高精度で高い量産性を達成で
きる主レンズを有する陰極線管用電子銃を得ることがで
きる。ビードサポートを電極に取付けるときに発生する
電子レンズ形成部の歪みを抑制できる。According to the present invention, the focusing electrode constituting the main lens of the electron gun has an intermediate portion between the large diameter portion and the small diameter portion, which does not require much precision. Then, the intermediate portion is made longer than the large-diameter portion or the small-diameter portion, an electrode support to be embedded and fixed in the insulating support is attached to the intermediate portion, and the small-diameter portion connected to both end edges of the cylindrical electrode facing in the tube axis direction is provided. With this arrangement, the deformation of the electron lens (main lens) forming portion associated with the assembly of the electron gun is suppressed, and the deterioration of the convergence characteristics of the electron beam is suppressed.
It is possible to obtain an electron gun for a cathode ray tube having a main lens capable of facilitating an assembling operation and achieving high precision and high mass productivity. It is possible to suppress distortion of the electron lens forming portion that occurs when the bead support is attached to the electrode.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明による陰極線管用電子銃の第１実施例を
構成する筒状電極のを説明する一部断面した側面図であ
る。FIG. 1 is a partially cross-sectional side view illustrating a cylindrical electrode constituting a first embodiment of a cathode ray tube electron gun according to the present invention.

【図２】本発明による陰極線管用電子銃の全体構造を説
明する側面図である。FIG. 2 is a side view illustrating the overall structure of an electron gun for a cathode ray tube according to the present invention.

【図３】図２を管軸Ｙ−Ｙ回りに９０°回転させた側面
図である。FIG. 3 is a side view obtained by rotating FIG. 2 by 90 ° around a tube axis YY.

【図４】本発明による陰極線管用電子銃の第２実施例を
構成する筒状電極のを説明する一部断面した側面図であ
る。FIG. 4 is a partially cross-sectional side view illustrating a cylindrical electrode constituting a second embodiment of the electron gun for a cathode ray tube according to the present invention.

【図５】本発明による陰極線管用電子銃の第３実施例を
構成する筒状電極のを説明する一部断面した側面図であ
る。FIG. 5 is a partially cross-sectional side view illustrating a cylindrical electrode constituting a third embodiment of the electron gun for a cathode ray tube according to the present invention.

【図６】本発明による陰極線管用電子銃の第４実施例を
構成する筒状電極のを説明する一部断面した側面図であ
る。FIG. 6 is a partially sectional side view illustrating a cylindrical electrode constituting a fourth embodiment of the electron gun for a cathode ray tube according to the present invention.

【図７】本発明による他の構成の陰極線管用電子銃の全
体構造を説明する側面図である。FIG. 7 is a side view illustrating the overall structure of a cathode ray tube electron gun having another configuration according to the present invention.

【図８】本発明による陰極線管用電子銃の第５実施例を
構成する筒状電極のを説明する一部断面した側面図であ
る。FIG. 8 is a partially sectional side view for explaining a cylindrical electrode constituting a fifth embodiment of the cathode ray tube electron gun according to the present invention.

【図９】本発明による陰極線管用電子銃の第６実施例を
構成する筒状電極のを説明する一部断面した側面図であ
る。FIG. 9 is a partially sectional side view for explaining a cylindrical electrode constituting a sixth embodiment of the electron gun for a cathode ray tube according to the present invention.

【図１０】本発明による陰極線管用電子銃を陰極線管ネ
ック部に収納したときの断面図である。FIG. 10 is a cross-sectional view when the electron gun for a cathode ray tube according to the present invention is housed in a neck portion of the cathode ray tube.

【図１１】本発明による陰極線管用電子銃を用いた陰極
線管の構造例を説明する投写型陰極線管の部分断面図で
ある。FIG. 11 is a partial cross-sectional view of a projection type cathode ray tube illustrating a structural example of a cathode ray tube using the electron gun for a cathode ray tube according to the present invention.

【図１２】本発明による電子銃を組み込んだ陰極線管を
用いた投写型テレビ受像機の一例を説明する正面図であ
る。FIG. 12 is a front view illustrating an example of a projection television receiver using a cathode ray tube incorporating an electron gun according to the present invention.

【図１３】図１２に示した投写型テレビ受像機の内部構
造例を説明する断面模式図である。13 is a schematic sectional view illustrating an example of the internal structure of the projection television receiver shown in FIG.

【図１４】従来の投写型陰極線管に使用されている大口
径電子銃の一構造例を説明する側面図である。FIG. 14 is a side view illustrating a structural example of a large-diameter electron gun used in a conventional projection type cathode ray tube.

【図１５】図１４を管軸Ｚ−Ｚ回りに９０°回転させた
側面図である。FIG. 15 is a side view in which FIG. 14 is rotated by 90 ° around a tube axis ZZ.

【図１６】従来の投写型陰極線管に使用されている筒状
電極の電子銃組込み前の状態を示す部分断面した側面図
である。FIG. 16 is a partial cross-sectional side view showing a state before a cylindrical electrode used in a conventional projection type cathode ray tube is incorporated into an electron gun.

【図１７】従来の投写型陰極線管に使用されている電子
銃の他の構造例を説明する側面図である。FIG. 17 is a side view illustrating another example of the structure of an electron gun used in a conventional projection type cathode ray tube.

【図１８】電子銃を組立てるための組立て用軸棒（マウ
ントピン）に電極を設置した一部断面図である。FIG. 18 is a partial sectional view in which electrodes are provided on an assembly shaft (mount pin) for assembling an electron gun.

【符号の説明】[Explanation of symbols]

１ 第１電極 ２ 第２電極 ３ 第３電極 ４，４３ 第４電極 ４１ 電極支持体 ４ａ 第４電極のパネル側部 ４ｂ 第４電極の陰極側部 ４ｃ 第４電極の中間部 ４３ａ 陽極側筒状部 ４３ｂ 陰極側筒状部 ４３ｃ 中間部 ５ 第５電極 ５ａ 第５電極の径大部 ５ｂ 第５電極の径小部 ６ 絶縁支持体 ９０ 速度変調コイル DESCRIPTION OF SYMBOLS 1 1st electrode 2 2nd electrode 3 3rd electrode 4,43 4th electrode 41 Electrode support 4a Panel side of 4th electrode 4b Cathode side of 4th electrode 4c Middle part of 4th electrode 43a Anode side cylindrical shape Part 43b Cathode-side cylindrical part 43c Intermediate part 5 Fifth electrode 5a Large diameter part of fifth electrode 5b Small diameter part of fifth electrode 6 Insulating support 90 Speed modulation coil

Claims (13)

【特許請求の範囲】[Claims] 【請求項１】陰極、制御電極、加速電極、第１陽極、集
束電極および第２陽極を含む複数の電極を管軸方向に所
定の間隔で配置し、各電極の側壁に設けた電極支持体を
絶縁支持体に埋設して固定した電子銃を有する陰極線管
用電子銃において、 前記電子銃は、陰極側部と中間部とパネル側部とで異な
る３つの径をもつ筒状の集束電極を有し、前記第２陽極
内に前記集束電極のパネル側部を挿入して主レンズ部を
形成し、前記集束電極は、前記中間部の内径が前記パネ
ル側部の内径より小さくかつ陰極側部の内径より大き
く、前記集束電極の中間部に前記電極支持体を設けたこ
とを特徴とする陰極線管用電子銃。A plurality of electrodes including a cathode, a control electrode, an accelerating electrode, a first anode, a focusing electrode, and a second anode are arranged at predetermined intervals in a tube axis direction, and are provided on a side wall of each electrode. For a cathode ray tube having an electron gun embedded and fixed in an insulating support, the electron gun having a cylindrical focusing electrode having three different diameters at a cathode side, an intermediate portion, and a panel side. Then, a panel side of the focusing electrode is inserted into the second anode to form a main lens portion, and the focusing electrode has an inner diameter of the intermediate portion smaller than an inner diameter of the panel side and a cathode side. An electron gun for a cathode ray tube, wherein the electrode support is provided at an intermediate portion of the focusing electrode, which is larger than an inner diameter. 【請求項２】請求項１において、前記集束電極の管軸方
向長さは、中間部が陰極側部より長く且つ中間部がパネ
ル側部より長いことを特徴とする陰極線管用電子銃。2. The electron gun for a cathode ray tube according to claim 1, wherein a length of said focusing electrode in a tube axis direction is longer at a middle portion than at a cathode side portion and at a middle portion is longer than a panel side portion. 【請求項３】陰極、制御電極、第１陽極、集束電極およ
び第２陽極を含む複数の電極を管軸方向に所定の間隔で
配置し、各電極の側壁に設けた電極支持体を絶縁支持体
に埋設して固定した陰極線管用電子銃において、 前記電子銃は、管軸方向に伸び且つ陰極側部と中間部と
パネル側部とで異なる３つの径をもつ筒状の集束電極を
有し、前記第２陽極内に前記集束電極のパネル側部を挿
入して主レンズ部を形成し、前記集束電極は第１陽極側
の第１集束電極と陰極側の第２集束電極の２つに分割さ
れかつ電気的に接続されていることを特徴とする陰極線
管用電子銃。3. A plurality of electrodes including a cathode, a control electrode, a first anode, a focusing electrode and a second anode are arranged at predetermined intervals in a tube axis direction, and an electrode support provided on a side wall of each electrode is insulated. An electron gun for a cathode ray tube embedded and fixed in a body, wherein the electron gun has a cylindrical focusing electrode extending in the tube axis direction and having three different diameters at a cathode side portion, an intermediate portion, and a panel side portion. A main lens portion is formed by inserting the panel side of the focusing electrode into the second anode, and the focusing electrode is divided into two, a first focusing electrode on the first anode side and a second focusing electrode on the cathode side. An electron gun for a cathode ray tube, which is divided and electrically connected. 【請求項４】請求項３において、前記集束電極の管軸方
向長さは、中間部が陰極側部より長く且つ中間部がパネ
ル側部より長いことを特徴とする陰極線管用電子銃。4. The electron gun for a cathode ray tube according to claim 3, wherein a length of said focusing electrode in a tube axis direction is longer at a middle portion than at a cathode side portion and at a middle portion is longer than a panel side portion. 【請求項５】請求項３において、前記第２集束電極は陰
極側に径大部を有し、第２陽極側に径小部を有し、前記
径小部に電極支持体を設けたことを特徴とする陰極線管
用電子銃。5. The device according to claim 3, wherein the second focusing electrode has a large-diameter portion on the cathode side, a small-diameter portion on the second anode side, and an electrode support is provided on the small-diameter portion. An electron gun for a cathode ray tube. 【請求項６】請求項３において、前記第１集束電極は陰
極側部と中間部と第２陽極側部とで異なる３つの径をも
つ筒状の電極であり、前記第１集束電極の電極支持体は
中間部に設けられたことを特徴とする陰極線管用電子
銃。6. The first focusing electrode according to claim 3, wherein the first focusing electrode is a cylindrical electrode having three different diameters at a cathode side portion, an intermediate portion, and a second anode side portion. An electron gun for a cathode ray tube, wherein the support is provided at an intermediate portion. 【請求項７】請求項３において、前記集束電極は陰極側
部で第１集束電極と第２集束電極の２つに分割されかつ
電気的に接続され、前記第１集束電極は陰極側部と中間
部と第２陽極側部とで異なる３つの径をもつ筒状の集束
電極であることを特徴とする陰極線管用電子銃。7. The focusing device according to claim 3, wherein the focusing electrode is divided and electrically connected to a first focusing electrode and a second focusing electrode at a cathode side, and the first focusing electrode is connected to the cathode side. An electron gun for a cathode ray tube, comprising a cylindrical focusing electrode having three different diameters at an intermediate portion and a second anode side portion. 【請求項８】請求項７において、前記第１集束電極電の
極支持体は中間部に設けられたことを特徴とする陰極線
管用電子銃。8. The electron gun for a cathode ray tube according to claim 7, wherein the pole support for the first focusing electrode is provided at an intermediate portion. 【請求項９】請求項７において、前記第１集束電極電の
極支持体は陰極側部に設けられたことを特徴とする陰極
線管用電子銃。9. The electron gun for a cathode ray tube according to claim 7, wherein the pole support for the first focusing electrode is provided on a cathode side. 【請求項１０】請求項７において、前記集束電極の管軸
方向長さは、中間部が陰極側部より長く且つ中間部がパ
ネル側部より長いことを特徴とする陰極線管用電子銃。10. An electron gun for a cathode ray tube according to claim 7, wherein a length of said focusing electrode in a tube axis direction is longer at an intermediate portion than at a cathode side and at an intermediate portion than at a panel side. 【請求項１１】請求項７において、前記第２集束電極は
陰極側に径大部を有し、第２陽極側に径小部を有し、前
記径小部に電極支持体を設けたことを特徴とする陰極線
管用電子銃。11. The method according to claim 7, wherein the second focusing electrode has a large-diameter portion on the cathode side, a small-diameter portion on the second anode side, and an electrode support is provided on the small-diameter portion. An electron gun for a cathode ray tube. 【請求項１２】陰極、制御電極、加速電極、第１陽極、
集束電極および第２陽極を含む複数の電極を管軸方向に
所定の間隔で配置し、各電極の側壁に設けた電極支持体
を絶縁支持体に埋設して固定した電子銃を有する陰極線
管において、 前記電子銃の最終円筒電極である第２陽極とこの第２陽
極に管軸方向で対向する円筒電極である集束電極とで主
レンズ部を構成してなり、前記集束電極は第２陽極側に
第２陽極側筒状部を有し、陰極側に陰極側筒状部を有
し、前記第２陽極側筒状部と前記陰極側筒状部とを連接
する中間部を有し、前記中間部は前記第２陽極側筒状部
または前記陰極側筒状部より小さい内径を有し、前記中
間部に前記電極支持体を設けたことを特徴とする陰極線
管用電子銃。12. A cathode, a control electrode, an acceleration electrode, a first anode,
In a cathode ray tube having an electron gun in which a plurality of electrodes including a focusing electrode and a second anode are arranged at predetermined intervals in the tube axis direction, and an electrode support provided on a side wall of each electrode is embedded in an insulating support and fixed. A main lens portion comprising a second anode, which is a final cylindrical electrode of the electron gun, and a focusing electrode, which is a cylindrical electrode opposed to the second anode in the tube axis direction, wherein the focusing electrode is on the second anode side. Having a second anode-side tubular portion, having a cathode-side tubular portion on the cathode side, having an intermediate portion connecting the second anode-side tubular portion and the cathode-side tubular portion, An electron gun for a cathode ray tube, wherein an intermediate portion has an inner diameter smaller than the second anode-side cylindrical portion or the cathode-side cylindrical portion, and the electrode support is provided in the intermediate portion. 【請求項１３】請求項１１において、前記集束電極は前
記中間部で２つに分割され、前記集束電極は管軸方向に
陽極側筒状部を有する第１集束電極と陰極側筒状部を有
する第２集束電極とに分割され、前記中間部に前記電極
支持体を設け、かつ前記各中間部を電気的に連接したこ
とを特徴とする陰極線管用電子銃。13. The focusing electrode according to claim 11, wherein the focusing electrode is divided into two at the intermediate portion, and the focusing electrode includes a first focusing electrode having an anode-side tubular portion in a tube axis direction and a cathode-side tubular portion. An electron gun for a cathode ray tube, wherein the electron support is divided into a second focusing electrode, the electrode support is provided at the intermediate portion, and the intermediate portions are electrically connected to each other.
JP6973098A 1997-04-01 1998-03-19 Electron gun for cathode-ray tube Pending JPH10334824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6973098A JPH10334824A (en) 1997-04-01 1998-03-19 Electron gun for cathode-ray tube

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP9-82524 1997-04-01
JP8252497 1997-04-01
JP6973098A JPH10334824A (en) 1997-04-01 1998-03-19 Electron gun for cathode-ray tube

Publications (1)

Publication Number Publication Date
JPH10334824A true JPH10334824A (en) 1998-12-18

Family

ID=26410892

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6973098A Pending JPH10334824A (en) 1997-04-01 1998-03-19 Electron gun for cathode-ray tube

Country Status (1)

Country Link
JP (1) JPH10334824A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6583547B1 (en) * 2000-03-07 2003-06-24 Hitachi, Ltd. Cathode ray tube with UPF type electron gun having particular electrode structure and spacing
US6815913B2 (en) 2001-07-30 2004-11-09 Hitachi, Ltd. Cathode ray tube
EP1225615A3 (en) * 2001-01-19 2005-02-16 Hitachi, Ltd. Cathode ray tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6583547B1 (en) * 2000-03-07 2003-06-24 Hitachi, Ltd. Cathode ray tube with UPF type electron gun having particular electrode structure and spacing
EP1225615A3 (en) * 2001-01-19 2005-02-16 Hitachi, Ltd. Cathode ray tube
US6815913B2 (en) 2001-07-30 2004-11-09 Hitachi, Ltd. Cathode ray tube

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