JPH10125255A - Electron gun and its manufacture - Google Patents
Electron gun and its manufactureInfo
- Publication number
- JPH10125255A JPH10125255A JP8281999A JP28199996A JPH10125255A JP H10125255 A JPH10125255 A JP H10125255A JP 8281999 A JP8281999 A JP 8281999A JP 28199996 A JP28199996 A JP 28199996A JP H10125255 A JPH10125255 A JP H10125255A
- Authority
- JP
- Japan
- Prior art keywords
- insulating rod
- electrode
- electron gun
- grid electrode
- grid
- 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
Links
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は電子銃及びその製造
方法に関し、特に組立精度が良好で、小口径でも高解像
度を得ることのできる電子銃及びその製造方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electron gun and a method of manufacturing the same, and more particularly, to an electron gun having good assembling accuracy and capable of obtaining a high resolution even with a small diameter.
【0002】[0002]
【従来の技術】パーソナルコンピュータなどの表示装置
に用いられる陰極線管用電子銃の一例を図10及び図1
1から説明する。図において、1は平面形状が小判形の
平面部1aの周縁にスカート部1bを有し、このスカー
ト部1bの長辺に平板状の支持部1cを突出形成して、
平面部1aの長軸に沿う一直線上に3つの電子ビーム透
過孔(図示例では中央の透過孔1dのみ示す)を穿設し
た第1グリッド電極、2は第1グリッド電極1の平面部
1aとほぼ同一形状の中間プレートで、長辺に平板状の
支持部2aを突出形成し、電子ビーム透過孔位置に径大
の貫通孔(図示例では中央の貫通孔2bのみ示す)を穿
設している。3は第1グリッド電極1の平面部1aとほ
ぼ同一形状の筒状体で、長辺に沿う側壁に図12に示す
支持部材4の支持部4aが固定されている。この支持部
4aと隣り合い橋絡する支持部4bが第1グリッド電極
1の支持部1cに重ね合わされた中間プレート2の支持
部2aに重合し3つの部材を溶接して一体化し第1グリ
ッド電極1に支持部材4の外方に延びる支持部4cを取
り付けている。この第1グリッド電極1には外部引き出
し用リードが接続されているが図示省略している。5は
ガラスブロックで、カソード(図示せず)が挿入される
3本一組のスリーブ6(図示例では1本のみ示す)が嵌
着され、筒状体3に溶着されている。7は第1グリッド
電極1とほぼ同じ形状で、電子ビーム透過孔7aを穿設
し、長辺側に支持部7bを形成した第2グリッド電極、
8は、一端に底部9aを有し、この底部9aに電子ビー
ム透過孔9bが穿設された小判形筒状体9と、両端が開
口した小判形筒状体10とからなる第3グリッド電極
で、筒状体10内には電子ビーム透過孔を有する補正電
極11が配置され、衝合させた各小判形筒状体9、10
の端面が溶接され一体化されている。この第3グリッド
電極8は支持部9c、10aの他に筒状体9の外周に支
持部材12が予め固定されている。13は両端が開口し
た小判形筒状体14内に電子ビーム透過孔を有する補正
電極15を配置した第4グリッド電極で、第3グリッド
電極8と対向している。また、筒状体14の外周には側
面形状がコの字状の支持部材16が予め固定されてい
る。上記第1乃至第4グリッド電極1、7、8、13は
電極配列治具(図示せず)内でそれぞれの電極の支持部
1c、2a、4c、7b、9c、10a、12、16を
両側に向けて芯棒に挿入され、スペーサにより間隔が保
たれ、各電子ビーム透過孔を同心配置する。この電極配
列治具には、カソードのヒータ線を接続し、組み立てら
れた電子銃をステムピンに接続するための支持片17、
18も配列されている。このようにして、電極配列治具
上で各支持部及び支持片を両側に配列した状態で、加熱
し軟化させたガラス製の絶縁ロッド19を両側から支持
部に押し付け、支持部及び支持片の先端を絶縁ロッド1
9に圧入して固定し電子銃の中間構体を得る。さらに各
スリーブ6に、端面20aにエミッタ物質21を被着し
たカソードスリーブ20を挿入し、スリーブ6の下端部
とカソードスリーブ20とを溶接し、さらに、リードの
両端が金属タブ22に接続され、巻回されて絶縁被覆さ
れたヒータ23を挿入してその金属タブ22、22を支
持片17、17に接続し、他の支持片18、18を図示
しないがステムに気密に貫通された支持用ステムピンに
固定し、さらに支持片17、17をヒータ用ステムピン
に、他の外部引き出し用リードとこれと対応するステム
ピンとを順次接続して、図外の第4グリッド電極13の
先端にシールドカップ電極を接続して電子銃を完成す
る。この電子銃はグリッド電極間の静電界によって形成
される主電子レンズ部によってエミッタ物質21(カソ
ード電極)から放出された電子を集束させているが、高
解像度を得るには主電子レンズ部の倍率と球面収差が小
さいほど良い。2. Description of the Related Art FIGS. 10 and 1 show an example of a cathode ray tube electron gun used for a display device such as a personal computer.
The description starts from 1. In the figure, 1 has a skirt portion 1b on the periphery of an oval flat portion 1a, and a flat support portion 1c protrudingly formed on the long side of the skirt portion 1b,
A first grid electrode in which three electron beam transmission holes (only a central transmission hole 1d is shown in the illustrated example) is formed on a straight line along the long axis of the plane portion 1a. An intermediate plate having substantially the same shape is formed by projecting a flat supporting portion 2a on the long side and forming a large-diameter through hole (only the center through hole 2b is shown in the illustrated example) at the position of the electron beam transmitting hole. I have. Numeral 3 denotes a cylindrical body having substantially the same shape as the flat portion 1a of the first grid electrode 1, and a support portion 4a of a support member 4 shown in FIG. 12 is fixed to a side wall along a long side. The supporting portion 4b adjacent to and bridging with the supporting portion 4a overlaps with the supporting portion 2a of the intermediate plate 2 superimposed on the supporting portion 1c of the first grid electrode 1, and welds and integrates three members to form the first grid electrode. 1 is provided with a support portion 4c extending outward from the support member 4. External lead leads are connected to the first grid electrode 1 but are not shown. Reference numeral 5 denotes a glass block into which a set of three sleeves 6 (only one is shown in the illustrated example) into which a cathode (not shown) is inserted is fitted and welded to the cylindrical body 3. Reference numeral 7 denotes a second grid electrode having substantially the same shape as the first grid electrode 1, having an electron beam transmitting hole 7a formed therein, and a support portion 7b formed on a long side.
A third grid electrode 8 has an oval cylindrical body 9 having a bottom 9a at one end and an electron beam transmitting hole 9b formed at the bottom 9a, and an oval cylindrical body 10 having both ends opened. In the cylindrical body 10, a correction electrode 11 having an electron beam transmitting hole is disposed, and the abutted oval cylindrical bodies 9, 10
Are welded and integrated. In the third grid electrode 8, a support member 12 is fixed in advance to the outer periphery of the cylindrical body 9 in addition to the support portions 9c and 10a. Reference numeral 13 denotes a fourth grid electrode in which a correction electrode 15 having an electron beam transmitting hole is disposed in an oval cylindrical body 14 having both ends opened, and is opposed to the third grid electrode 8. A support member 16 having a U-shaped side surface is fixed to the outer periphery of the cylindrical body 14 in advance. The first to fourth grid electrodes 1, 7, 8, and 13 are provided on both sides of support portions 1c, 2a, 4c, 7b, 9c, 10a, 12, 16 of the respective electrodes in an electrode arrangement jig (not shown). The electron beam transmitting holes are concentrically arranged while being inserted into the core rod toward the center and spaced apart by spacers. The electrode arrangement jig is connected to a cathode heater wire, and a support piece 17 for connecting the assembled electron gun to the stem pin is provided.
18 are also arranged. In this manner, in a state where the support portions and the support pieces are arranged on both sides on the electrode array jig, the heated and softened glass insulating rod 19 is pressed against the support portions from both sides, and the support portions and the support pieces are formed. Insulated tip 1
9 and press-fitted to obtain an intermediate structure of the electron gun. Further, a cathode sleeve 20 having an emitter material 21 adhered to an end face 20a is inserted into each sleeve 6, the lower end of the sleeve 6 is welded to the cathode sleeve 20, and both ends of the lead are connected to the metal tab 22, The metal tabs 22, 22 are connected to the support pieces 17, 17 by inserting the wound and insulated heater 23, and the other support pieces 18, 18 are not shown, but are supported by the stem airtightly penetrated by the stem. Then, the supporting pieces 17 and 17 are connected to the stem pin for the heater, the other lead for external drawing and the corresponding stem pin are sequentially connected, and a shield cup electrode is attached to the tip of the fourth grid electrode 13 (not shown). To complete the electron gun. In this electron gun, electrons emitted from the emitter material 21 (cathode electrode) are focused by a main electron lens portion formed by an electrostatic field between grid electrodes. However, in order to obtain high resolution, the magnification of the main electron lens portion is increased. The smaller the spherical aberration, the better.
【0003】[0003]
【発明が解決しようとする課題】この電子銃はその製造
過程で、支持部材1c、2a、4c、7b、9c、10
a、12、16を絶縁ロッド19に圧入して複数の電極
を一体化しその軸と間隔を保たせている。しかしなが
ら、ガラス製絶縁ロッド19を加熱し軟化させるといっ
ても流動化し変形するほど加熱できず、圧入の際に電極
の支持部が過大な力で押圧されて電極が変形し、その間
隔、平行度、各電子ビーム透過孔の軸ずれを生じ、電極
間に形成される電子レンズ部が歪み、各電子ビームの焦
点がずれ、フォーカス特性が劣化し解像度が低下すると
いう問題があった。また、エミッタ物質21(カソード
電極)と第1グリッド電極1の間隔及び第1、第2グリ
ッド電極1、7の間隔により決定されるカットオフ特性
もばらつくという問題もあった。一方、小型化、省エネ
ルギー化に対応するため、電子銃を小型化すると、一般
的に主電子レンズ部の倍率が高くなり、球面収差も大き
くなるため、上述のように電子銃の製造過程での電極の
変形は変形量がわずかでも、フォーカス特性やカットオ
フ特性に多大な影響を与えることから、高解像度が要求
される陰極線管では重要な問題となっていた。このよう
な問題を解決するものとして例えば特開昭57ー829
44号公報(先行技術1)や特開昭61ー2229号公
報(先行技術2)が知られている。先行技術1には絶縁
ロッドに支持部材を予め植設し、位置決めした電極群に
沿って絶縁ロッドを配設し、電極と支持部材とをレ−ザ
光により溶接固定した電子銃が開示され、より具体的に
は支持部材の形状を、各電極に当接する部位を広くとる
ためL字状又はT字状に形成することが望ましいことが
開示され、その図面には絶縁ロッドに埋設された固定部
の先端に電極の軸に沿う取付部を設け、側面形状をL字
状又はT字状にした支持部材を電極に接続した電子銃が
開示されている。また、先行技術2には予め絶縁ロッド
に支持部材を植設し、各電極の側壁にも予め電極支持体
を溶接固定し、位置決めした電極群の電極支持体に絶縁
ロッドの支持部材を衝合させて、衝合部をレ−ザ光によ
り溶接固定する電子銃の製造方法が開示されている。こ
れらは電極と支持部材の接続時にグリッド電極に過大な
力がかからないため電極の変形がないことから特性的に
安定した電子銃が期待できる。しかしながら、いずれの
技術も支持部材の端面と、電極側壁または電極に固定し
た電極支持体とを衝合させ、この衝合部の側方に露呈し
た狭い接合面に沿ってレーザ光を照射する必要があり、
レ−ザ光の焦点位置を正確に制御しなければならないと
いう問題があった。また、陰極線管の製造過程で電子銃
が高温にさらされると、熱膨張による応力が溶接部分に
集中し溶接部分が剥離する虞があるため、十分な溶接強
度を得るためには一つの支持部材に対して連続的に又は
複数個所溶接し、より確実にするためには接合面を両側
から溶接する必要があり。作業に時間がかかるという問
題があった。また、前者は支持部材を直接、電極に溶接
するものであるが、小判形筒状体のグリッド電極の場
合、支持部材はグリッド電極の長径方向中間に溶接され
るため、レ−ザ光をグリッド電極の周壁に沿って照射し
なければならない。しかしながら、電極のわずかな傾き
を考慮すると電極周壁に対してやや傾斜してレ−ザ光を
照射する必要がある。一方、電子銃を小型化するために
絶縁ロッドから突出する支持部材の突出高さを低くして
グリッド電極と絶縁ロッドの間隔を小さくすると支持部
材と電極の溶接部分が絶縁ロッドによって隠され、レ−
ザ光の最適な照射角度が制限されるようになるため、小
型の電子銃では電極や支持部材の位置決め、レーザ光の
照射角度などを厳密に設定する必要があった。また、後
者は電極に予め電極支持体を固定する必要があり、作業
工数が嵩む上、電極支持体によって小型化が制限される
という問題もあった。In the manufacturing process of this electron gun, support members 1c, 2a, 4c, 7b, 9c, 10
A, 12, and 16 are press-fitted into an insulating rod 19 to integrate a plurality of electrodes so as to keep a distance from their axes. However, even if the glass insulating rod 19 is heated and softened, the glass insulating rod 19 cannot be heated enough to be fluidized and deformed. At the time of press-fitting, the supporting portion of the electrode is pressed by an excessive force, and the electrode is deformed. In this case, there is a problem that an axial deviation of each electron beam transmitting hole occurs, an electron lens portion formed between the electrodes is distorted, a focal point of each electron beam is deviated, focus characteristics are deteriorated, and resolution is reduced. Also, there is a problem that the cutoff characteristics determined by the distance between the emitter material 21 (cathode electrode) and the first grid electrode 1 and the distance between the first and second grid electrodes 1 and 7 vary. On the other hand, when the size of the electron gun is reduced in order to cope with miniaturization and energy saving, the magnification of the main electron lens portion generally increases and the spherical aberration also increases. Deformation of the electrode has a significant effect on focus characteristics and cut-off characteristics even if the amount of deformation is slight, so it has been an important problem in a cathode ray tube requiring high resolution. To solve such a problem, for example, Japanese Patent Laid-Open No. 57-829
No. 44 (Prior Art 1) and JP-A-61-2229 (Prior Art 2) are known. Prior Art 1 discloses an electron gun in which a supporting member is implanted in advance on an insulating rod, the insulating rod is disposed along the positioned electrode group, and the electrode and the supporting member are welded and fixed by laser light. More specifically, it is disclosed that the shape of the support member is desirably formed in an L-shape or a T-shape in order to widen a portion that comes into contact with each electrode, and the drawing shows a fixing member embedded in an insulating rod. An electron gun is disclosed in which a mounting portion is provided at the end of the portion along the axis of the electrode, and a supporting member having an L-shaped or T-shaped side surface is connected to the electrode. Further, in the prior art 2, a support member is implanted in advance on an insulating rod, an electrode support is welded and fixed to the side wall of each electrode in advance, and the support member of the insulating rod is joined to the electrode support of the positioned electrode group. A method of manufacturing an electron gun in which the abutting portion is welded and fixed by laser light is disclosed. Since an excessive force is not applied to the grid electrode at the time of connection between the electrode and the support member, there is no deformation of the electrode, so that an electron gun which is characteristically stable can be expected. However, in either technique, it is necessary to abut the end surface of the support member with the electrode side wall or the electrode support fixed to the electrode, and irradiate the laser beam along a narrow joint surface exposed on the side of the abutment portion. There is
There is a problem that the focal position of the laser light must be controlled accurately. Further, when the electron gun is exposed to a high temperature in the manufacturing process of the cathode ray tube, stress due to thermal expansion may concentrate on the welded portion and the welded portion may be peeled off. It is necessary to weld the joint surface from both sides continuously or at a plurality of places, and to make it more reliable. There was a problem that it took time to work. In the former, the support member is directly welded to the electrode. However, in the case of an oval cylindrical grid electrode, the support member is welded to the middle of the grid electrode in the major axis direction, so that the laser light is applied to the grid. It must be irradiated along the peripheral wall of the electrode. However, considering the slight inclination of the electrode, it is necessary to irradiate the laser light with a slight inclination to the peripheral wall of the electrode. On the other hand, if the height of the support member protruding from the insulating rod is reduced to reduce the distance between the grid electrode and the insulating rod in order to reduce the size of the electron gun, the welded portion between the support member and the electrode is hidden by the insulating rod and −
Since the optimum irradiation angle of the light is limited, it is necessary to precisely set the positioning of the electrodes and the support members, the irradiation angle of the laser light, and the like in a small electron gun. Further, in the latter case, it is necessary to fix the electrode support to the electrode in advance, so that the number of work steps is increased and there is a problem that miniaturization is limited by the electrode support.
【0004】[0004]
【課題を解決するための手段】本発明は上記課題を解決
するために提案されたもので、絶縁ロッドに埋設される
固着部とこの固着部に接続されて絶縁ロッドに沿って延
び絶縁ロッドの側壁より突出する取付部とを有する支持
部材を複数個、予め所定の間隔で配列して植設し、この
絶縁ロッドを、所定の間隔で一直線上に配列させた複数
のグリッド電極に沿って配置し、絶縁ロッドの側壁から
突出しグリッド電極と重合させた取付部をレーザ光にて
溶接固定したことを特徴とする電子銃及びその製造方法
を提供する。SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and has a fixing portion embedded in an insulating rod and a connecting portion extending along the insulating rod connected to the fixing portion. A plurality of support members having mounting portions protruding from the side walls are arranged and implanted at predetermined intervals in advance, and the insulating rods are arranged along a plurality of grid electrodes arranged in a straight line at predetermined intervals. The present invention also provides an electron gun and a method for manufacturing the electron gun, wherein a mounting portion projecting from a side wall of an insulating rod and overlapping with a grid electrode is welded and fixed by laser light.
【0005】[0005]
【発明の実施の形態】本発明による電子銃及びその製造
方法では、所定の間隔で一直線上に配列させた複数のグ
リッド電極に、絶縁ロッドの側壁から突出させた取付部
をグリッド電極と重合させてレーザ光にて溶接固定する
ため、電極に不所望な力を加えることはなく一体化で
き、小径の電子銃でも主電子レンズの歪みがなく、カッ
トオフ特性、フォーカス特性ともに良好な電子銃を得る
ことができる。支持部材は、断面がL字形だけでなくT
字形、π字形のものが利用できる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In an electron gun and a method of manufacturing the same according to the present invention, a mounting portion projecting from a side wall of an insulating rod is overlapped with a plurality of grid electrodes arranged in a straight line at a predetermined interval. Since the laser beam is used for welding and fixing, the electrodes can be integrated without applying undesired force to the electrodes, and even with a small-diameter electron gun, there is no distortion of the main electron lens, and an electron gun with good cut-off characteristics and good focus characteristics. Obtainable. The support member is not only L-shaped in cross section but also T-shaped.
Characters and π-shapes are available.
【0006】[0006]
【実施例】以下に本発明を図10構造の電子銃に適用し
図1及び図2から説明する。図において、図10及び図
11と同一物には同一符号を付し重複する説明を省略す
る。図中相違するのは、グリッド電極1、7、8、13
と絶縁ロッド19の連結構造で、具体的には、絶縁ロッ
ド19に埋設される固着部Aとこの固着部Aに接続され
て絶縁ロッド19に沿って両側に延び、外端が絶縁ロッ
ド19の側壁より突出された取付部Bとを有する支持部
材24、25、26a、26b、27を予め、絶縁ロッ
ド19に植設し、この絶縁ロッド19を、一直線上に所
定の間隔で配列し位置決めされた複数のグリッド電極
1、7、8、13の両側に配置し、取付部Bを各グリッ
ド電極の側壁に重合させ、この取付部Bの絶縁ロッド1
9の側壁から突出した図示×部分にレーザ光を照射して
一体化した構造としている。支持部材24、25、26
a、26b、27は図3乃至図5に示すように、電極に
取り付けられる平板状の取付部Bの一端側に絶縁ロッド
19に埋設される固着部Aを垂設した構造のものや、両
端が電極に取り付けられる平板状の取付部B、Bの中間
に絶縁ロッド19に埋設される固着部A、Aを垂設した
構造、平板状取付部Bの中間を両側に向かって切起し固
着部Aを形成したものなど、断面L字状、T字状、π字
状などが好適である。また取付部Bはそれが接続される
グリッド電極の形状、寸法に応じてその巾Wが設定され
る。この電子銃は、支持部材の取付部Bが絶縁ロッド1
9から露呈した位置でグリッド電極と重合しているた
め、レ−ザ光の照射可能面積が広く、レ−ザ光の照射角
度の制限が少なく、レ−ザ光の焦点位置の制御が容易で
ある。また、グリッド電極と支持部材の取付部は面接触
しているため、取付部上の微小面積内でも複数個所の溶
接が可能で確実に接続することができる。また溶接のた
めのレ−ザ光の照射角度の制約が少ないため、絶縁ロッ
ドから突出する支持部材の突出高さを低くしてグリッド
電極と絶縁ロッドの間隔を小さくできる。これにより電
子銃の径を短縮でき、小型化が可能となりグリッド電極
の変形がなく、電極の軸ずれ、間隔ずれも生じないか
ら、カットオフ特性が安定し、フォーカス特性が良好な
小型の電子銃を実現できる。次に本発明による電子銃の
製造方法を図6乃至図9から説明する。図において、図
1及び図2と同一物には同一符号を付し重複する説明を
省略する。先ず、図6及び図7に示すように、支持部材
24、25、26a、26b、27を支持部材配列治具
29に載置する。この支持部材配列治具29は支持部材
24〜27を各固着部Aを上方に向けて収容し位置決め
する位置決め穴29a、29b、29c、29d、29
eを穿設した第1の配列治具29と、支持片17、18
を保持する第2の配列治具30で構成され、第1、第2
の配列治具29、30は型合穴29fと係合ピン30a
により係合し一体化される。また支持片17は第1、第
2の配列治具29、30によって挟持され、支持片18
は板ばね31により保持され、図示省略するが位置決め
穴に収容された支持部材は穴の底部に真空吸着穴を開口
させ真空吸着するなどして、治具を上下反転させても支
持部材及び支持片が落下しないようにしている。図8は
絶縁ロッド19をほぼ水平に支持する耐熱性支持台32
と、上下動自在に配置され、絶縁ロッド19を加熱し軟
化させるガスバーナ33を示す。この耐熱性支持台32
上で加熱され軟化した絶縁ロッド19上に、配列治具2
9、30を支持部材及び支持片の各固着部を下に向けて
水平動並びに上下動させて重合し、加圧して各固着部を
絶縁ロッド19に押し込む。このとき、支持部材及び支
持片の各固着部を予熱しておくと絶縁ロッド19との溶
着性が良好となり、絶縁ロッド19と支持部材の熱膨張
率の差異による微小な位置ずれが低減でき、固着部Aの
板厚が厚かったり、固着部Aの埋め込み深さが深い場合
でも絶縁ロッド19をクラックさせることなく確実に溶
着できる。この結果、絶縁ロッド19は図6にて一点鎖
線で示すように配列治具29、30上に配置され、その
側壁より取付部Bを突出させて支持部材24〜27及び
支持片17、18を固着一体化する。このようにして絶
縁ロッド19に植設された支持部材24〜27の各取付
部Aは配列治具29の位置決め穴29a〜29eの底部
に密着するため絶縁ロッド19に溶着される際の加圧力
によっても変形、位置ずれがなく、相互の間隔を正確に
保って一体化される。次に、図9に示すように、中間プ
レート2、筒状体3を予め一体化したグリッド電極1と
他のグリッド電極7、8、13を電極配列治具34を用
い、その芯棒(図示せず)により電子ビーム透過孔を一
直線上に配置し、各電極間にスペーサ35、36、37
を挿入して電極の間隔を設定し、複数の電極を一直線上
に所定の間隔で配列する。このようにして電極を整列し
た電極配列治具34を、各電極の軸が水平となるように
配置し、各電極上に予め支持部材24〜27が固着され
た絶縁ロッド19を配置し、図示しない押え部材にて絶
縁ロッド19を押さえる。次に、平面的に見て絶縁ロッ
ド19の側壁から突出した取付部Aに順次レーザ光を照
射し支持部材とグリッド電極とを溶接する。この溶接作
業時には電極に過大な力をかける必要がないため電極が
変形する虞はない。このようにして一方の絶縁ロッド1
9の支持部材をグリッド電極に接続した後、電極配列治
具34を上下反転させ、残りの絶縁ロッド19の支持部
材をグリッド電極に接続し電子銃の中間構体を完成す
る。上記製造方法によれば、電極配列治具内で一直線上
に所定の間隔で配列された複数の電極と、予め絶縁ロッ
ドに植設された支持部材の相互の位置決めが容易で、支
持部材の取付部と電極の重合部分のレ−ザ光照射可能領
域の面積が広く、レ−ザ光の照射角度の制限が少なく、
レ−ザ光の焦点位置の制御が容易である。そのため、電
極の変形や軸ずれがなく、カットオフ特性、フォーカス
特性のすぐれた電子銃を製造することができる。尚、本
発明は上記実施例にのみ限定されるものではなく例え
ば、支持部材を位置決めする配列治具29の位置決め穴
の深さを適宜異ならせ、これに対応して支持部材の固着
部の高さを設定することにより、取付部の高さ位置を設
定でき、径の異なるグリッド電極にも対応させることが
できる。また、本発明は上記実施例に示す構造の電子銃
に限定されるものではなく、ユニポテンシャル形電子
銃、バイポテンシャル形電子銃、その他の形式の電子銃
に適用でき、板状、筒状の各グリッド電極の配列順序も
適宜変更することができる。また3電子ビームのカラー
陰極線管用電子銃だけでなく、1電子ビームのモノクロ
陰極線管あるいはカラー陰極線管用の電子銃にも適用で
きることはいうまでもない。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. In the figure, the same components as those in FIGS. 10 and 11 are denoted by the same reference numerals, and duplicate description will be omitted. The difference between the figures is that the grid electrodes 1, 7, 8, 13
Specifically, a fixing portion A embedded in the insulating rod 19 and connected to the fixing portion A and extending to both sides along the insulating rod 19, and an outer end of the connecting portion A Support members 24, 25, 26a, 26b, and 27 having a mounting portion B protruding from the side wall are implanted in advance in the insulating rod 19, and the insulating rods 19 are arranged and positioned at predetermined intervals on a straight line. Are arranged on both sides of the plurality of grid electrodes 1, 7, 8, and 13, and the mounting portion B is overlapped on the side wall of each grid electrode.
The structure shown in FIG. 9 is integrally formed by irradiating a laser beam to a portion x shown in the figure protruding from the side wall of the substrate 9. Support members 24, 25, 26
As shown in FIGS. 3 to 5, a, 26b, and 27 have a structure in which a fixing portion A embedded in an insulating rod 19 is suspended at one end of a flat mounting portion B attached to an electrode, or both ends. Are attached to the electrodes, and fixed portions A, A embedded in the insulating rod 19 are suspended in the middle of the plate-shaped attachment portions B, B, and the middle of the plate-shaped attachment portion B is cut and raised toward both sides to be fixed. An L-shaped cross section, a T-shaped cross section, a π-shaped cross section, or the like, such as those in which the portion A is formed, are preferable. The width W of the mounting portion B is set according to the shape and size of the grid electrode to which the mounting portion B is connected. In this electron gun, the mounting portion B of the support member is configured such that the insulating rod 1
9 and overlaps with the grid electrode at a position exposed from the substrate 9, the laser light irradiation area is large, the laser light irradiation angle is less limited, and the control of the laser light focal position is easy. is there. Further, since the grid electrode and the mounting portion of the support member are in surface contact with each other, welding can be performed at a plurality of locations even within a small area on the mounting portion, and the connection can be reliably performed. In addition, since there is little restriction on the irradiation angle of the laser beam for welding, the height of the support member projecting from the insulating rod can be reduced to reduce the distance between the grid electrode and the insulating rod. As a result, the diameter of the electron gun can be reduced, the size can be reduced, and there is no deformation of the grid electrode, and there is no displacement of the axis or the gap of the electrode. Can be realized. Next, a method for manufacturing an electron gun according to the present invention will be described with reference to FIGS. In the figure, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description will be omitted. First, as shown in FIGS. 6 and 7, the support members 24, 25, 26 a, 26 b, and 27 are placed on the support member arrangement jig 29. The support member arrangement jig 29 is provided with positioning holes 29a, 29b, 29c, 29d, 29 for accommodating and positioning the support members 24-27 with the fixing portions A facing upward.
e, the first arrangement jig 29 having the perforations e, and the support pieces 17, 18
And a second arrangement jig 30 for holding the first and second arrangement jigs.
The alignment jigs 29 and 30 are provided with a mating hole 29f and an engagement pin 30a.
Are engaged and integrated. The support piece 17 is sandwiched between the first and second arrangement jigs 29 and 30, and the support piece 18 is held.
Is held by a leaf spring 31. Although not shown, the support member accommodated in the positioning hole is provided with a vacuum suction hole at the bottom of the hole and is vacuum-sucked. The pieces are prevented from falling. FIG. 8 shows a heat resistant support 32 for supporting the insulating rod 19 substantially horizontally.
And a gas burner 33 that is disposed so as to be vertically movable and heats and softens the insulating rod 19. This heat resistant support 32
The arrangement jig 2 is placed on the insulating rod 19 heated and softened above.
The fixing members 9 and 30 are horizontally moved and moved up and down with the fixing portions of the support member and the support piece facing downward to be polymerized, and each fixing portion is pressed into the insulating rod 19 by applying pressure. At this time, if the fixing portions of the support member and the support piece are preheated, the weldability with the insulating rod 19 is improved, and a minute displacement due to a difference in the coefficient of thermal expansion between the insulating rod 19 and the support member can be reduced. Even when the thickness of the fixed portion A is large or the embedded depth of the fixed portion A is deep, welding can be reliably performed without cracking the insulating rod 19. As a result, the insulating rod 19 is disposed on the arraying jigs 29 and 30 as shown by a dashed line in FIG. 6, and the mounting portions B are protruded from the side walls thereof so that the supporting members 24 to 27 and the supporting pieces 17 and 18 are connected. Adhere and integrate. The mounting portions A of the support members 24 to 27 implanted in the insulating rod 19 in this manner are brought into close contact with the bottoms of the positioning holes 29 a to 29 e of the array jig 29, so that the pressing force when welding to the insulating rod 19 is performed. Also, there is no deformation or displacement, and the components are integrated while maintaining the mutual distance accurately. Next, as shown in FIG. 9, the grid electrode 1 in which the intermediate plate 2 and the cylindrical body 3 are integrated in advance and the other grid electrodes 7, 8, and 13 are formed by using an electrode arrangement jig 34 with a core rod (FIG. (Not shown), the electron beam transmitting holes are arranged in a straight line, and spacers 35, 36, 37 are provided between the electrodes.
Is inserted to set the interval between the electrodes, and a plurality of electrodes are arranged at a predetermined interval on a straight line. The electrode arrangement jig 34 in which the electrodes are aligned in this manner is arranged so that the axis of each electrode is horizontal, and the insulating rod 19 to which the support members 24 to 27 are fixed in advance is arranged on each electrode. The insulating rod 19 is held down by a holding member that is not used. Next, a laser beam is sequentially applied to the mounting portion A protruding from the side wall of the insulating rod 19 when viewed in plan, and the support member and the grid electrode are welded. During this welding operation, there is no need to apply an excessive force to the electrodes, so there is no risk of the electrodes being deformed. Thus, one of the insulating rods 1
After connecting the supporting members of No. 9 to the grid electrode, the electrode arrangement jig 34 is turned upside down, and the supporting members of the remaining insulating rods 19 are connected to the grid electrodes to complete the intermediate structure of the electron gun. According to the above manufacturing method, it is easy to mutually position the plurality of electrodes arranged at a predetermined interval in a straight line in the electrode arrangement jig and the support member implanted in advance on the insulating rod, and to attach the support member. The area of the laser light irradiable area of the overlapping portion of the part and the electrode is large, the laser light irradiation angle is less limited,
Control of the focal position of the laser light is easy. Therefore, it is possible to manufacture an electron gun having excellent cut-off characteristics and focus characteristics without deformation or axial displacement of the electrodes. The present invention is not limited to the above embodiment. For example, the depth of the positioning holes of the array jig 29 for positioning the support member is appropriately changed, and the height of the fixing portion of the support member is correspondingly changed. By setting the height, the height position of the mounting portion can be set, and it is possible to correspond to grid electrodes having different diameters. Further, the present invention is not limited to the electron gun having the structure shown in the above embodiment, but can be applied to a unipotential electron gun, a bipotential electron gun, and other types of electron guns. The arrangement order of each grid electrode can also be appropriately changed. Needless to say, the present invention can be applied not only to an electron gun for a three-electron beam color cathode ray tube but also to an electron gun for a one-electron beam monochrome cathode ray tube or a color cathode ray tube.
【0007】[0007]
【発明の効果】以上のように本発明によれば、電子銃の
組立が容易で、カットオフ特性、フォーカス特性のすぐ
れた電子銃を得ることができる。As described above, according to the present invention, it is possible to obtain an electron gun which is easy to assemble and has excellent cut-off characteristics and focus characteristics.
【図1】 本発明による電子銃の一部破断側面図FIG. 1 is a partially cutaway side view of an electron gun according to the present invention.
【図2】 図1に示す電子銃の平面図FIG. 2 is a plan view of the electron gun shown in FIG.
【図3】 支持部材の一例を示す斜視図FIG. 3 is a perspective view showing an example of a support member.
【図4】 支持部材の一例を示す斜視図FIG. 4 is a perspective view showing an example of a support member.
【図5】 支持部材の一例を示す斜視図FIG. 5 is a perspective view showing an example of a support member.
【図6】 支持部材の配列治具を示す平面図FIG. 6 is a plan view showing a jig for arranging support members.
【図7】 図6に示す治具の要部側断面図FIG. 7 is a sectional side view of a main part of the jig shown in FIG. 6;
【図8】 絶縁ロッドに支持部材を一体化する工程を説
明する正面図FIG. 8 is a front view illustrating a step of integrating the support member with the insulating rod.
【図9】 絶縁ロッドに一体化された支持部材を電極に
接続する工程を説明する側面図FIG. 9 is a side view illustrating a step of connecting a support member integrated with an insulating rod to an electrode.
【図10】 従来の電子銃の構造を説明する要部断面正
面図FIG. 10 is a cross-sectional front view of a main part illustrating the structure of a conventional electron gun.
【図11】 図10に示す電子銃の側面図11 is a side view of the electron gun shown in FIG.
【図12】 第1グリッド電極、中間プレート、筒状体
を一体化する支持片を示す斜視図FIG. 12 is a perspective view showing a support piece that integrates a first grid electrode, an intermediate plate, and a tubular body.
1 第1グリッド電極 7 第2グリッド電極 8 第3グリッド電極 13 第4グリッド電極 19 絶縁ロッド 24 支持部材 25 支持部材 26a 支持部材 26b 支持部材 27 支持部材 A 固着部 B 取付部 DESCRIPTION OF SYMBOLS 1 1st grid electrode 7 2nd grid electrode 8 3rd grid electrode 13 4th grid electrode 19 Insulating rod 24 Support member 25 Support member 26a Support member 26b Support member 27 Support member A Fixing part B Mounting part
Claims (2)
部に接続されて絶縁ロッドに沿って延び絶縁ロッドの側
壁より突出する取付部とを有する支持部材を複数個、予
め所定の間隔で配列して植設し、この絶縁ロッドを、所
定の間隔で一直線上に配列させた複数のグリッド電極に
沿って配置し、絶縁ロッドの側壁から突出しグリッド電
極と重合させた取付部をレーザ光にて溶接固定したこと
を特徴とする電子銃。A plurality of support members each having a fixed portion embedded in the insulating rod and a mounting portion connected to the fixed portion and extending along the insulating rod and projecting from a side wall of the insulating rod, are provided at predetermined intervals. The insulating rods are arranged along a plurality of grid electrodes arranged in a straight line at a predetermined interval, and the mounting portion projecting from the side wall of the insulating rod and overlapping with the grid electrode is applied to the laser beam. An electron gun characterized by being fixed by welding.
部に直交接続され端部が絶縁ロッドの側壁より突出する
取付部を有する支持部材を複数個、絶縁ロッドに、その
軸方向に所定の間隔で配列して植設する工程と、電子ビ
ーム透過孔を有する複数のグリッド電極を所定の間隔で
一直線上に配列する工程と、位置決めされたグリッド電
極に沿って絶縁ロッドを配置し、支持部材の取付部をグ
リッド電極の周壁に重合させる工程と、グリッド電極に
重合し絶縁ロッドの側壁から突出した取付部にレーザ光
を照射し溶接する工程とを含むことを特徴とする電子銃
の製造方法。2. A plurality of supporting members having a fixing portion embedded in the insulating rod and a mounting portion orthogonally connected to the fixing portion and having an end protruding from a side wall of the insulating rod, are provided on the insulating rod in a predetermined axial direction. A step of arranging and implanting at an interval, a step of arranging a plurality of grid electrodes having electron beam transmission holes on a straight line at a predetermined interval, and arranging and supporting an insulating rod along the positioned grid electrode. Producing an electron gun, comprising: a step of superposing a mounting portion of a member on a peripheral wall of a grid electrode; and a step of irradiating a laser beam to a mounting portion superposed on the grid electrode and projecting from a side wall of an insulating rod and welding. Method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8281999A JPH10125255A (en) | 1996-10-24 | 1996-10-24 | Electron gun and its manufacture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8281999A JPH10125255A (en) | 1996-10-24 | 1996-10-24 | Electron gun and its manufacture |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10125255A true JPH10125255A (en) | 1998-05-15 |
Family
ID=17646820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8281999A Pending JPH10125255A (en) | 1996-10-24 | 1996-10-24 | Electron gun and its manufacture |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10125255A (en) |
-
1996
- 1996-10-24 JP JP8281999A patent/JPH10125255A/en active Pending
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