JP2004241127A - Cathode structure, cathode sleeve structure and cathode-ray tube device, as well as manufacturing method of cathode sleeve substrate and cathode structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cathode sleeve structure capable of improving yield in manufacturing of a cathode structure. <P>SOLUTION: The cathode sleeve structure comprises a housing member which has a tubular shape and of which one end is open, a plurality of support members which are shaped long and extend radially from the periphery of the opening of the housing member and are molded integrally with the housing member, and a plurality of coupling members which connect the support members and are molded integrally with the support members. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【００４９】
表１が示すように、上記▲１▼〜▲４▼の各工程において、第１の実施形態の陰極構体１０は、従来の陰極構体１００に比べて歩留が向上している。
特に、▲１▼黒化熱処理工程における、陰極スリーブ支持部材１４ｂの変形防止の効果が顕著である。
▲４▼溶接工程における歩留の向上の要因として、従来、溶接可能な範囲が、陰極スリーブ支持部材１４ｂの端部のみに限られていたのに対し、第１の実施形態の陰極構体１０では、外縁連結部材１４ｃ全体が、溶接可能な範囲となっているため、溶接位置が円周方向にずれた場合であっても、問題なく溶接ができることが挙げられる。
【００５０】
また、▲１▼〜▲４▼の各工程の合計の歩留は、第１の実施形態の陰極構体１０は９５．１％であるのに対し、従来の陰極構体１００は５５．２％となっており、本第１の実施形態における陰極構体１０の構成及び製造方法により約２倍の歩留が得られている。
以上のような構成及び製造方法とすることにより、陰極構体１０の製造過程において、陰極スリーブ支持部材１４ｂに外力が加わっても、この外力を他の陰極スリーブ支持部材１４ｂに分散させる外縁連結部材１４ｃの存在により、陰極スリーブ支持部材１４ｂの変形が防止される。
【００５１】
また、以上のような製造方法とすることにより、陰極構体１０の製造過程における中間生成物の搬送形態が、外力が加わり難い陰極スリーブ基板２２となり、この中間生成物を構成する構造上軟弱な陰極スリーブ支持部材１４ｂの変形を防止することができ、その結果、陰極構体１０の歩留を向上することができる。
（変形例）
なお、本第１の実施形態では、陰極スリーブ支持部材１４ｂは板状としたが、これに限らず、例えば、ほぼ円形断面の棒状のものであっても構わない。
【００５２】
また、本第１の実施形態では、陰極保持部材１３の上端部の外形状は、円形としたが、これに限らず、例えば、矩形であってもよい。
その場合、陰極スリーブ構造体１４の外縁連結部材１４ｃの形状は、陰極保持部材１３の上端部の形状に対応して矩形枠状となる。
また、本第１の実施形態では、陰極保持部材１３と外縁連結部材１４ｃとを溶接しているが、これに限らず、図８に示すように、外縁連結部材１４ｃを陰極スリーブ支持部材１４ｂの先端ではなく、途中に設け、この陰極スリーブ支持部材１４ｂの端部と陰極保持部材１３とを溶接してもよい。
【００５３】
その場合、第１の実施形態と同様に、外縁連結部材１４ｃの存在により陰極スリーブ支持部材１４ｂに加わる外力を他の陰極スリーブ支持部材１４ｂに分散する効果を有するが、溶接位置ずれに対する溶接不良防止効果は得られないため、溶接時において、陰極スリーブ支持部材１４ｂと陰極保持部材１３との位置関係をより厳密に管理する必要がある。
【００５４】
また、第１の実施形態では、外縁連結部材１４ｃは、全ての隣り合う陰極スリーブ支持部材１４ｂ同士を連結しているが、これに限らず、外縁連結部材１４ｃが、陰極スリーブ支持部材１４ｂのうち少なくとも隣り合う１組の陰極スリーブ支持部材１４ｂ同士を連結していればよい。
例えば、陰極スリーブ支持部材１４ｂ_１、１４ｂ_２及び１４ｂ_３の３つがあるとき、陰極スリーブ支持部材１４ｂ_１と１４ｂ_２とをそれぞれを連結し、陰極スリーブ支持部材１４ｂ_３がこれら陰極スリーブ支持部材のいずれにも連結されていなくてもよい。
【００５５】
このような場合、陰極スリーブ支持部材１４ｂ_１と１４ｂ_２においては、これらの一方に加わる外力を連結されている他方の陰極スリーブ支持部材へと分散するため、これら陰極スリーブ支持部材の変形を抑制することができる。
このとき、陰極スリーブ支持部材１４ｂ_３における変形に対する耐力は、従来と同様ではあるが、他の２つの陰極スリーブ支持部材における変形に対する耐力が向上しているため、総合的に見ると変形に対する耐力は、向上している。
【００５６】
また、第１の実施形態では、外縁連結部材１４ｃは、連続するリング形状であったが、これに限らず、例えば、図９に示すように、外縁連結部材１４ｃが、陰極スリーブ支持部材１４ｂ毎に分離し、それぞれが同一円の円周上に位置し、隣接する外縁連結部材１４ｃ同士が近接する形状であってもよい。
ここで、便宜上、前記近接する部分の隙間をスリット１４ｈといい、また、このように分離された延長部材の一例としての外縁連結部材１４ｃを、便宜上、外縁延長部材１４ｉという。
【００５７】
つまり、或る１つの陰極スリーブ支持部材１４ｂに外力が加わった場合、ある外力の範囲において陰極スリーブ支持部材１４ｂが弾性変形し、他の２つの陰極スリーブ支持部材１４ｂに繋がっている外縁延長部材１４ｉに接触し、その結果、外力を他の陰極スリーブ支持部材１４ｂに分散する。
そして、外力が除去されたとき、各陰極スリーブ支持部材１４ｂ及び外縁延長部材１４ｉは、元の位置に戻る。
【００５８】
発明者らは、上述の効果を発揮するためには、このスリット１４ｈの幅を、０．５ｍｍ以下にすればよいことを見いだした。
さらに、外縁延長部材１４ｉが寸断されていることにより、陰極スリーブ支持部材１４ｂ同士が連絡していないので、大きな塑性変形を伴う成形がなされても陰極スリーブ支持部材１４ｂ及び外縁延長部材１４ｉの割れなどの不具合が発生し難くなり、成形加工における形状の制約が緩和される。
【００５９】
より具体的には、第１の実施形態における陰極構体１０のように、リング形状の外縁連結部材１４ｃをヒータ収納部材１４ａ及び陰極スリーブ支持部材１４ｂと一体成形しようとすると、陰極スリーブ支持部材１４ｂの屈折角度θ（図９を参照）を小さくすることができないが、図９に示すように、スリット１４ｈがある外縁延長部材１４ｉでは、各陰極スリーブ支持部材１４ｂ片側の拘束が解かれることにより、各陰極スリーブ支持部材１４ｂを自由に折り曲げることができるようになり、屈折角度θを小さくすることができる。
【００６０】
また、上述のように外縁連結部材１４ｃ同士を完全に分離するのではなく、外縁連結部材１４ｃの一部を溝状に切り欠いてもよい。
また、第１の実施形態では、陰極スリーブ構造体１４の外縁連結部材１４ｃと陰極保持部材１３の端面とを密着させ、その溶接部分の複数箇所を溶接するとしたが、外縁連結部材１４ｃの全周を溶接してもよい。
【００６１】
また、第１の実施形態では、キャップ状部材１５とヒータ収納部材前駆体１４ｅとは別々に成形されていたが、図１０に示すように、１枚のＮｉ帯をカップ状に成形した後に行なうこのカップ上面のカットを省略することにより、これらを一体成形してもよい。
つまり、有蓋部材１４ｊがキャップ状部材１５として機能する。
【００６２】
その場合、キャップ状部材１５をヒータ収納部材前駆体１４ｅに溶接する第１溶接処理工程は不要となり、陰極スリーブ支持部材１４ｂが変形する機会がさらに減少する。
また、これまでの説明では、外縁連結部材１４ｃと陰極保持部材１３とが溶接されるとしたが、これに限らず、例えば、以下のようにしてもよい。
【００６３】
即ち、陰極本体部材１２と陰極保持部材１３とを溶接する第２溶接処理工程の直前において、図１１に示すように、外縁連結部材１４ｃと陰極スリーブ支持部材１４ｂとの境界近傍を切断し、外縁連結部材１４ｃのみを陰極本体部材１２から切り離し、３本の陰極スリーブ支持部材１４ｂの一端側を解放する。
そして、陰極スリーブ構造体１４の解放された陰極スリーブ支持部材１４ｂの一端部を屈曲させ、図１２に示すように、その屈曲部分と陰極保持部材１３の上端部との溶接する。
【００６４】
これにより、陰極スリーブ構造体１４の陰極スリーブ支持部材１４ｂと陰極保持部材１３とが溶接される。
このような溶接方法によれば、外縁連結部材１４ｃを切断する工程は増えるものの、従来の溶接装置を活用することができ、しかも、陰極本体部材１２と陰極保持部材１３との溶接固定直前までは、陰極スリーブ構造体１４の陰極スリーブ支持部材１４ｂは解放されることがないので、溶接直前までの陰極スリーブ支持部材１４ｂの変形を防止することができる。
【００６５】
また、図１１に示された切断箇所を、図１３に示された切断箇所とすることにより、即ち、陰極スリーブ支持部材１４ｂの延長上にある外縁連結部材１４ｃを残すように切断することにより、上述の陰極スリーブ支持部材１４ｂを屈曲する工程が省かれ、より陰極スリーブ支持部材１４ｂが変形する機会を少なくすることができる。
【００６６】
また、第１の実施形態では、先に述べた８つの工程のうち、５番目の工程である分離工程に至るまで、複数の陰極スリーブ前駆体１４ｄが陰極スリーブ基板２２に含まれた状態で移送及び保管がなされるとしたが、これに限らず、例えば、最初の工程から陰極スリーブ前駆体１４ｄを陰極スリーブ基板２２から切り離した状態で保管及び搬送がなされるとしてもよい。
【００６７】
その場合、切り離された陰極スリーブ前駆体１４ｄは、３つの支持部材前駆体１４ｆ同士が外縁連結部材前駆体１４ｇにより連結され、固定されているので、外力が加わった場合、この外力を各支持部材前駆体１４ｆに分散させることができ、支持部材前駆体１４ｆが変形することを抑制することができる。
また、第１の実施形態において、陰極スリーブ構造体１４は、純度９９．９％のＮｉ材からなるとし、また、陰極スリーブ構造体１４及び各陰極スリーブ支持部材１４ｂについて具体的な寸法を挙げ、黒化熱処理工程において、具体的な黒化の方法を挙げたが、これに限らず、少なくともヒータ収納部材１４ａと陰極スリーブ支持部材１４ｂと外縁連結部材１４ｃとが同一の材料で一体形状されている構成を維持しつつ、熱損失及び製造品質が従来よりも悪化しない範囲で、これら材質、黒化のための熱処理方法及び寸法を変更してもよい。
【００６８】
発明者らは、熱損失及び製造品質が従来よりも悪化しない範囲において、代替可能な材質、黒化のための熱処理方法及び寸法を模索するため、以下に示す６種の陰極構体が内蔵された電子銃を用いて動作試験を実施した。
なお、各試験の測定対象は、複数のインライン型電子銃内に存在する３つの陰極構体うち、両側２つの陰極構体の陰極スリーブである。
（試験品の仕様）
１．従来例の陰極構体１００としての仕様
従来の陰極構体１００として、円筒状の陰極スリーブ１０２の材質は、Ｃｒ（クロム）２０％、Ｎｉ（ニッケル）８０％であり、その円筒部の外径が１．６ｍｍ、高さが２．５ｍｍ、板厚が０．０４ｍｍとなっており、陰極スリーブ支持部材１０６の長さが２．５ｍｍ、幅が０．３ｍｍ、板厚が０．１ｍｍとなっているものを用いた。
【００６９】
なお、陰極スリーブ支持部材１０６は、Ｎｉ−Ｆｅ材からなり、陰極スリーブ１０２及び陰極保持部材１０５に溶接されている。
また、陰極スリーブ１０２は、湿潤水素中で熱処理され、その内外表面に黒色の酸化クロムが形成されている。
また、キャップ状部材１０３は、純度９９．９％のＮｉ材からなり、また、その外表面には、電子放射物質層１０４として、厚さを約０．０６５ｍｍのＢａＣＯ_３層が形成されている。
【００７０】
ヒータ１０１は、０．６５Ｗ用ヒータである。
２．比較例（１）の陰極構体としての仕様
また、比較例１の陰極構体として、第１の実施形態における陰極構体１０から黒化熱処理工程が省かれているものを用いた。
この比較例（１）の陰極スリーブ構造体は、材質が純度９９．９％のＮｉ材からなる点では、第１の実施形態における陰極構体１０と同様であるが、円筒状のヒータ収納部材１４ａの直径が１．５ｍｍ、高さが２．５ｍｍ、板厚が０．１ｍｍとなっている点で第１の実施形態における陰極構体１０とは異なる。
【００７１】
また、比較例（１）の支持部の幅が０．３ｍｍである点では、第１の実施形態における陰極構体１０と同様であるが、支持部の長さが２．０ｍｍ、幅が０．３ｍｍ、板厚が０．１ｍｍとなっている点で第１の実施形態における陰極構体１０とは異なる。
また、キャップ状部材１５の材質は、純度９９．９％のＮｉ材であり、その外表面には、電子放射物質層として、ＢａＯ（酸化バリウム）を主成分とする約０．０６５ｍｍの層が形成されている。
【００７２】
ヒータは、０．６５Ｗ用ヒータである。
３．比較例（２）の陰極構体としての仕様
比較例（２）の陰極構体は、図１０に示すように、１枚の板材をプレス加工することによりキャップ状部材１５とヒータ収納部材前駆体１４ｅとが一体成形されている点のみが、比較例（１）の陰極構体と異なる。
４．比較例（３）の陰極構体としての仕様
比較例（３）の陰極構体は、比較例１の陰極構体において、平均粒子径が１μｍのタングステン粉末と平均粒子径が５〜１０μｍの焼結アルミナとからなる高融点金属及び無機質結合材を組み合わせて陰極スリーブ構造体の内面を黒化させたものであり、その他材質及び寸法などは比較例（１）の陰極構体と同様である。
５．比較例（４）の陰極構体としての仕様
比較例（４）の陰極構体は、比較例（１）の陰極構体において、陰極スリーブ構造体１４の材質であるＮｉのなかにＭｇ（マグネシウム）を０．１％添加したものであり、その他材質及び寸法などは比較例（１）の陰極構体と同様である。６．比較例（５）の陰極構体としての仕様
比較例（５）の陰極構体は、比較例（１）の陰極構体において、陰極スリーブ構造体１４の材質を８０％Ｎｉ−２０％Ｃｒとし、陰極スリーブ構造体１４に水素処理を施した後、約７００℃で酸化処理を行い、その後、湿潤水素中において約１０００℃で熱処理を行なうことにより表面にＣｒ_２Ｏ_３を皮膜させて、黒色の陰極スリーブ構造体としたものである。
【００７３】
なお、その他材質及び寸法などは比較例（１）の陰極構体と同様である。
以下、これら６種の陰極構体を用いて実施された試験の結果について説明する。
なお、便宜上、図１４〜図１７において、従来の陰極構体を「（従来）」と表記し、比較例（１）〜（５）の陰極構体を「（１）」〜「（５）」とそれぞれ表記する。
（試験結果）
図１４は、初期（動作直後）の陰極構体の温度を示す図である。
【００７４】
発明者らは、各試験品の初期状態における複数の陰極構体の温度を測定し、そのばらつき、即ち、標準偏差を求めた。
このように陰極構体の温度のばらつきを求めるのは、以下の理由による。
即ち、カラー表示する陰極線管装置には、３つの陰極構体が具備されるが、各陰極構体の動作温度が大きくばらつくと、電子放射物質層の電子放出特性の劣化速度に差が生じ、陰極線管内の３本の電子ビーム電流がばらつき、ホワイトバランスが崩れ、色調不良の原因となる。
【００７５】
ここで、電子ビーム電流とは、各陰極構体に対応する初期の電流値に対する２０００時間経過後の電流値の割合を百分率で示したものである。
陰極構体の温度がばらつく要因は、ヒータ１１から電子放射物質層１６への熱伝導量に差が生じていることが判っている。
つまり、上述の熱伝導量の差を抑えることが、製品上及び製造上の課題となる。
【００７６】
初期状態における従来の陰極構体の温度の標準偏差は、図１４に示すように、６．２であり、同じく初期状態の比較例（１）〜（５）の陰極構体の温度の標準偏差は、それぞれ、２．６、２．０、０．９６、２．３、１．２であった。
この結果から、比較例（１）〜（５）の陰極構体は、従来品に比べ、動作直後の温度ばらつきが小さくなっていることがわかる。
【００７７】
中でも、比較例（３）ないし比較例（５）の陰極構体において、動作直後の温度ばらつきが小さいことがわかる。
図１５は、動作開始から２０００時間が経過した後の陰極構体の温度を示す図である。
２０００時間経過後における従来品の陰極構体の温度についての標準偏差は、図１５に示すように、６．９であり、同じく２０００時間経過後の比較例（１）〜（５）の陰極構体の温度の標準偏差は、それぞれ、３．０、２．４、１．３、２．９、１．８であった。
【００７８】
この結果から、比較例（１）〜（５）の陰極構体は従来のものに比べ、温度ばらつきが小さくなっていることがわかる。
また、初期状態と同様に、比較例（３）ないし比較例（５）の陰極構体において他の比較例よりもさらに温度のばらつきが小さくなっていることがわかる。
また、図１６は、陰極構体の先述の電子ビーム電流を示す図である。
【００７９】
２０００時間経過後における従来の陰極構体の電子ビーム電流の標準偏差は、図１６に示すように、６．４であり、同じく２０００時間経過後の比較例（１）〜（５）の陰極構体の電子ビーム電流の標準偏差は、それぞれ、３．１、２．７、１．８、０．９、１．６であった。
この結果から、比較例（１）〜（５）の陰極構体は従来品に比べ、電子ビーム電流のばらつきも小さくなっていることがわかる。
【００８０】
なかでも、比較例（４）の陰極構体において他の比較例よりもさらに電子ビーム電流のばらつきが顕著に小さくなっていることがわかる。
図１７は、電源を入れてから、陰極線管に安定した画像が映し出された時の陰極電流の８０％が流れるまでの時間である出画時間を示す図である。
従来の陰極構体の出画時間の標準偏差は、図１７に示すように、０．８７であり、比較例（１）〜（５）の陰極構体の出画時間の標準偏差は、それぞれ、０．４５、０．３、０．２１、０．４０、０．２８であった。
【００８１】
この結果から、比較例（１）〜（５）の本発明の陰極構体は従来のものに比べ、出画時間のばらつきが小さくなっていることがわかる。
また、比較例（２）、比較例（３）及び比較例（５）の陰極構体においては、他の比較例及び従来のものに比べ、出画時間そのものが小さい領域においてばらつきが小さくなっていることもわかる。
【００８２】
このように、比較例（１）〜（５）は、従来品に比べ、陰極構体の温度及び電子ビーム電流のばらつきが小さいいため、製品として採用しても問題がないものと思われる。
比較例（１）〜（５）が従来品に比べ、陰極構体の温度及び電子ビーム電流のばらつきが小さくなっている１つの要因として、円筒状のヒータ収納部材１４ａと陰極スリーブ支持部材１４ｂとが、溶接により接合されているのではなく、一体成形されているため、製品形状的にも安定したものが出来上がり、各陰極構体の熱損失のばらつきが抑えられているためと考えられる。
【００８３】
また、上述の比較例（１）〜（４）の陰極構体は、陰極スリーブ構造体にＮｉを主成分とした材料を用いたが、Ｆｅ（鉄）、Ｃｏ（コバルト）、Ｃｒを主成分としてもよいし、主成分のＮｉにＦｅないしＣｏを加えたものを用いても良い。これらの材料選択は、陰極スリーブ構造体１４の熱伝導率、熱膨張率、剛性強度及びコストを考慮して、適宜最適設計することが可能である。
【００８４】
また、耐高温度特性を向上させるには、２０００℃以上の高融点を持つＴａ（タンタル）、Ｍｏ（モリブデン）ないしＮｂ（ニオブ）のいずれかの金属を主材料として陰極スリーブ構造体１４を形成することが好ましい。
また、比較例（４）の陰極構体では、添加剤としてＭｇを用いたが、Ｍｇに代えて、Ｃｒ、Ｓｉ（シリコン）、Ｗ（タングステン）ないしＡｌ（アルミニウム）を用いても構わない。
【００８５】
なお、これらの金属を数種類混ぜたものを添加剤としても構わない。
その他、Ｆｅ、Ｃｏ、Ｔａ、Ｍｏ、Ｎｂ、Ｃｒのいずれか１つの金属を主成分として形成された陰極スリーブ構造体１４に、Ｍｇ、Ｓｉ、Ｃｒ、ＷないしＡｌのいずれか１つ以上の金属添加剤を含有したものであっても構わない。
ただし、当然に主成分がＣｒの場合には、添加剤としてＣｒは用いない。
【００８６】
また、第１の実施形態の陰極構体は、汎用の陰極線管に搭載される酸化物陰極のものについて説明したが、高輝度、高精細の陰極線管に搭載される含浸型陰極であっても構わない。
この場合、キャップ状部材１５上に電子放射物質層１６を吹き付けにより形成して陰極構体を構成するのではなく、多孔質のタングステンペレットをキャップで覆い、タングステンペレットを陰極スリーブ構造体１４に溶接をすることにより陰極構体を構成してもよい。
【００８７】
あるいは、図１０に示すような有蓋筒状の有蓋部材１４ｊの上面にそのタングステンペレットを溶接することにより陰極構体を構成してもよい。
（第２の実施形態）
以下、第２の実施形態における陰極構体３０について説明する。
（構成）
陰極構体３０は、第１の実施形態における陰極構体１０と同様に、ブラウン管などの陰極線管装置において電子を発生させる陰極及びその支持材からなる。
【００８８】
この陰極構体３０は、陰極構体１０のヒータ収納部材１４ａ及びヒータ収納部材前駆体１４ｅの形状を一部変更した以外は、陰極構体１０と同様の構造である。
以下、陰極構体３０と陰極構体１０との相違点について説明する。
なお、便宜上、陰極構体１０における陰極本体部材１２、中間生成物１２ａ、陰極保持部材１３、陰極スリーブ構造体１４、ヒータ収納部材１４ａ、陰極スリーブ支持部材１４ｂ、外縁連結部材１４ｃ、陰極スリーブ前駆体１４ｄ、ヒータ収納部材前駆体１４ｅ、支持部材前駆体１４ｆ及び外縁連結部材前駆体１４ｇに対応する陰極構体３０における部材名称を、それぞれ陰極本体部材３２、中間生成物３２ａ、陰極保持部材３３、陰極スリーブ構造体３４、ヒータ収納部材３４ａ、陰極スリーブ支持部材３４ｂ、外縁連結部材３４ｃ、陰極スリーブ前駆体３４ｄ、ヒータ収納部材前駆体３４ｅ、支持部前駆体３４ｆ及び外縁連結部材前駆体３４ｇとする。
【００８９】
陰極構体３０は、図１８に示すように、円筒状のヒータ収納部材１４ａの肉厚が厚くなったフランジ部３４ｋを有する点で陰極構体１０と異なる。
（製造方法）
次に、陰極構体３０の製造方法について説明する。
このフランジ部３４ｋは、第１の実施形態において説明した１番目の工程である陰極スリーブ基板成形工程において形成され、その他の工程については第１の実施の形態と同様である。
【００９０】
ただし、折り曲げ工程における曲げ加工治具の形状が異なる。
以下、本第２の実施形態において第１の実施形態との差が生じている陰極スリーブ基板成形工程及び折り曲げ工程について説明する。
（陰極スリーブ基板成形工程）
第１の実施形態における陰極構体１０のヒータ収納部材前駆体１４ｅは、支持部材前駆体１４ｆとの境界部を除き、０．０５ｍｍの一定の肉厚ｔ０を有していたが、図１９に示すように第２の実施形態における陰極構体３０のヒータ収納部材前駆体３４ｅは、支持部前駆体３４ｆとの境界部付近の肉厚ｔ２が０．０８ｍｍであり、他の部分の肉厚ｔ０（０．０５ｍｍ）よりも０．０３ｍｍ程厚くなっている高さｈが０．１ｍｍのフランジ部３４ｋを有する。
（折り曲げ工程）
図２０（ａ）に示す中間生成物３２ａの断面は、図２０（ｂ）に示すように、フランジ部３４ｋにおいて肉厚が厚くなっている。
【００９１】
図２０（ｂ）に示すように、中間生成物３２ａは、曲げ加工治具３８ａの負圧がかかっている凹部にセットされる。
なお、図２０（ｂ）から（ｄ）に示す中間生成物３２ａの断面は、図２０（ａ）に示す中間生成物３２ａのＣ−Ｃ断面である。
そして、図２０（ｃ）に示すように、曲げ加工治具３８ａと曲げ加工治具３８ｂとの相対的位置を保ちつつ、曲げ加工治具３８ｂが曲げ加工治具３８ｃと接触する位置まで降下する。
【００９２】
さらに、図２０（ｄ）に示すように、曲げ加工治具３８ａが降下する。
このとき、曲げ加工治具３８ａの先端部３８ｄとフランジ部３４ｋの上面とが接触し、中間生成物３２ａが押し下げられ、曲げ加工治具３８ｃの突起部３８ｅが中間生成物３２ａのヒータ収納部材３４ａ内に挿入されると共に、支持部前駆体３４ｆが折り曲げられて塑性変形することにより、陰極本体部材３２となる。
【００９３】
先に述べた第１の実施形態における折り曲げ工程では、厚さ０．０５ｍｍの支持部材前駆体１４ｆを曲げ加工治具２８ａ及び曲げ加工治具２８ｂで直接挟み込んで折り曲げているため、曲げ加工治具のストローク量のばらつきにより、支持部材前駆体１４ｆの座屈部Ｂ（図７（ｃ）参照）にせん断力が働いて亀裂が生じる場合があった。
【００９４】
第２実施形態における折り曲げ工程では、フランジ部３４ｋの存在により、曲げ加工治具３８ａの先端部３８ｄが肉厚の薄い支持部前駆体３４ｆではなく、肉厚の厚いフランジ部３４ｋに当て、支持部前駆体３４ｆを折り曲げるため、座屈部Ｄに亀裂が生じ難い。
つまり、このようなフランジ部３４ｋを有する形状及び折り曲げ方法により陰極構体３０の歩留性がさらに向上する。
（フランジ部３４ｋの高さについての制約）
このように、陰極構体３０の歩留性を向上させるフランジ部３４ｋではあるが、このフランジ部３４ｋを設けることにより、陰極スリーブ構造体３４から陰極保持部材３３への熱伝導量、即ち、熱損失量の増加を招く恐れがある。
【００９５】
より具体的には、フランジ部３４ｋの高さｈを高くすると、陰極スリーブ構造体３４から陰極保持部材３３への熱伝導量、即ち、熱損失量が増加するため、むやみに高さｈを高くすることはできない。
発明者らは、鋭意検討した結果、ヒータ収納部材３４ａの肉厚を０．０５ｍｍ、陰極スリーブ支持部材３４ｂの厚み及び幅をそれぞれ０．０５ｍｍ及び０．２５ｍｍとするとき、フランジ部３４ｋの高さｈを陰極スリーブ支持部材３４ｂの板厚ｔ１で除した値（以下、「形状比値（Ｃ）」という。）と熱損失量との間に、図２１に示す特性があることを見いだした。
【００９６】
これによると、形状比値（Ｃ）が２から４まで推移する範囲において、熱損失量の変化が著しく、熱損失量が約４パーセント増加している。
発明者らは、熱損失の悪化状況を考慮して、形状比値（Ｃ）の上限を３．５とした。
また、発明者らは、フランジ部３４ｋの高さｈが陰極スリーブ支持部材３４ｂの厚みｔ１を下回る場合、即ち、形状比値（Ｃ）が１未満の場合、上述の折り曲げ工程において曲げ加工治具３８ａの先端部３８ｄが陰極スリーブ支持部材３４ｂにいち早く接触し、陰極スリーブ支持部材３４ｂにせん断力が生じ易いため、上述の形状比値（Ｃ）の下限を１とした。
【００９７】
さらに、発明者らは、形状比値（Ｃ）を徐々に増加させたとき、形状比値（Ｃ）が２の点で熱損失量が大きく変化し始めることに着目し、熱損失を抑制しつつ、折り曲げ工程における歩留性を向上させる上で、形状比値（Ｃ）を２に設定することが好ましいことを見いだした。
これにより、フランジ部３４ｋの高さｈは、上述の形状比値（Ｃ）が２となる値、即ち、０．１ｍｍとされている。
【００９８】
以上のような構成及び製造方法とすることにより、陰極構体３０の折り曲げ工程において、陰極スリーブ支持部材３４ｂが折り曲げられる際、このせん断力が直接陰極スリーブ支持部材３４ｂに働くことが防止されるため、陰極スリーブ支持部材３４ｂの亀裂発生を防止することができ、陰極構体の歩留を向上させることができる。
【００９９】
なお、第２の実施形態では、フランジ部３４ｋの肉厚ｔ２は、０．０８ｍｍとしたが、これに限らず、曲げ加工治具３８ａの先端部３８ｄがフランジ部３４ｋの上面と接触してストッパとしての役割を果すことができ、熱損失量が許容量を越えない範囲において変更しても構わない。
【０１００】
【発明の効果】
以上の説明のように、本発明の陰極スリーブ構造体は、ヒータを収納する陰極スリーブ構造体であって、筒状をなし、一端が開口している収納部材と、長尺状をなし、前記収納部材の前記開口周縁から放射状に延出され、前記収納部材と一体成形されている複数の支持部材と、前記支持部材同士を連結し、前記支持部材と一体成形されている連結部材とを備えることを特徴とする。
【０１０１】
元来陰極スリーブ構造体は、その機能上、熱損失を抑えるために支持部材が薄く形成されているが、従来の陰極スリーブ構造体の場合、保持部材に接合されるまでは、支持部材の根元から先が自由に変形できる状態にあるのに対して、上記支持部材は、隣り合う支持部材と根元より先で連結されているので、陰極スリーブ構造体が強固な他の構造体に組み込まれるまで、連結部材により支持部材の動きが抑制されると共に、支持部材に加わった外力が他の支持部材へと分散されるため、支持部材の変形が抑制される。
【０１０２】
したがって、この陰極スリーブ構造体を用いて陰極構体を製造する工程においても、支持部材の変形により使用不可となる陰極スリーブ構造体が減少するため、陰極構体の製造時における歩留性が向上される。
また、前記各支持部材における前記連結位置は、各支持部材の外側の端部であるとすることもできる。
【０１０３】
これにより、支持部材において開放端が存在しないため、支持部材の変形がより抑制される。
また、前記各連結部材は、同一円のほぼ円周上に位置するとすることもできる。
これにより、支持部材に加わった外力が他の支持部材へとより分散し易くなる。
【０１０４】
また、前記収納部材は、前記開口が位置する第１端部とその他の第２端部とを有し、前記各支持部材は、収納部材との境界付近において、前記第２端部側にいずれも一様な角度で屈曲しているとすることもできる。
これにより、支持部材毎の形状のばらつきが抑えられる。
つまり、各支持部材における外力の付加条件が均一化される。
【０１０５】
また、前記屈曲の角度は、前記収納部材の中心軸に対して９０度未満であるとすることもできる。
これにより、陰極スリーブ構造体の長手方向における長さが短くなり、外力が加わる見かけ上の表面積が減少し、より外力が加わり難くなる。
また、前記支持部材は、ｎ本あり、隣り合う前記支持部材同士の開き角度は、ほぼ３６０／ｎ度となっているとすることもできる。
【０１０６】
これにより、各支持部材における外力の付加条件が均一化される。
また、前記収納部材、前記支持部材及び前記連結部材は、Ｎｉ、Ｆｅ、Ｃｏ、Ｔａ、Ｍｏ及びＮｂのいずれか１つの金属が主成分となっているとすることもできる。
これにより、材料の選択肢が増え、陰極スリーブ構造体の設計自由度が増加する。
【０１０７】
また、前記収納部材、前記支持部材及び前記連結部材は、Ｍｇ、Ｓｉ、Ｃｒ、Ｗ及びＡｌのいずれか１つ以上の金属が含有されているとすることもできる。
これにより、これら含有金属を電子放射物質の還元剤として作用させることができる。
また、前記収納部材、前記支持部材及び前記連結部材は、Ｃｒが主成分となっているとすることもできる。
【０１０８】
これにより、金属粒子を吹き付けることなく、単に加熱するだけで、前記収納部材、即ち、陰極スリーブに黒化膜を形成することができる。
また、前記収納部材、前記支持部材及び前記連結部材は、Ｍｇ、Ｓｉ、Ｗ及びＡｌのいずれか１つ以上の金属が含有されているとすることもできる。
これにより、これら含有金属を電子放射物質の還元剤として作用させることができる。
【０１０９】
また、前記収納部材は、前記開口が位置する第１端部とその他の第２端部とを有し、前記第２端部は、前記収納部材と一体成形された部材により閉塞されているとすることもできる。
これにより、第２端部の閉塞が収納部材の成形に伴って行なわれる。
つまり、収納部材を成形する工程とは別に、別部材を嵌合して溶接する工程を設ける必要がないため、支持部材に外力が加わる機会が減少する。
【０１１０】
また、本発明の陰極スリーブ構造体は、ヒータを収納する陰極スリーブ構造体であって、筒状をなし、一端が開口している収納部材と、前記収納部材の前記開口周縁から放射状に延出され、前記収納部材と一体成形されている複数の支持部材と、それぞれが前記各支持部材から延出され、隣り合う支持部材から延出されたものの一部同士が近接するように、前記支持部材と一体成形されている複数の延長部材とを備えるとしてもよい。
【０１１１】
隣接する延長部材同士が互いに近接する方向へと外力が加わったとき、支持部材から延出された延長部材と他の延長部材が接触するので、延長部材により支持部材の動きが抑制されると共に、支持部材に加わった外力が他の支持部材へと分散されるため、支持部材の変形が抑制される。
つまり、陰極スリーブ構造体を用いて陰極構体を製造する工程においても、支持部材の変形により使用不可となる陰極スリーブ構造体が減少するため、陰極構体の製造時における歩留性が向上される。
【０１１２】
また、前記延長部材が各支持部材から延出される位置は、前記各支持部材の外側の端部である。
外力が支持部材に加わったとき、弾性変形域内において、支持部材から延出された延長部材と他の延長部材が接触するとすれば、これにより、支持部材の端部の動きが抑制される。
【０１１３】
また、前記各延長部材は、同一円のほぼ円周上に位置するとすることもできる。
これにより、外力が支持部材に加わったとき、延長部材同士が接触し易くなると共に、支持部材に加わった外力が他の支持部材へとより分散し易くなる。
また、前記各延長部材の端部同士において、前記近接が生じているとすることもできる。
【０１１４】
これにより、外力が支持部材に加わったとき、各延長部材の端部同士が接触する。
また、前記近接が生じている箇所の隙間が０．５ｍｍ以下であるとすることもできる。
これにより、外力が支持部材に加わったとき、弾性変形域内において、支持部材から延出された延長部材と他の延長部材が接触し、延長部材により支持部材の動きが抑制されると共に、支持部材に加わった外力が他の支持部材へと分散されるため、支持部材の変形が抑制される。
【０１１５】
また、本発明の陰極スリーブ構造体は、ヒータを収納する陰極スリーブ構造体であって、筒状をなし、第１端部と第２端部とを有し、当該第１端部に開口を有し、当該開口の周縁部分の肉厚が他の部分よりも厚くなっていることにより段差が形成されている収納部材と、長尺状をなし、前記段差の周縁から放射状に延出され、前記収納部材と一体成形され、さらに、前記段差部との境界付近において、前記第２端部側に屈曲している複数の支持部材とを備えるとしてもよい。
【０１１６】
これにより、肉厚が他の部分よりも厚くなっている段差部付近で支持部材が屈曲しているため、この屈曲による亀裂の発生が抑止される。
また、前記支持部材は、厚みがｔｍｍの板であり、前記筒長手方向における前記段差の長さＬが、ｔｍｍ以上３．５ｔｍｍ以下となっているとすることもできる。
【０１１７】
これにより、熱損失の大幅に増加させることなく、前記屈曲による亀裂の発生が抑止される。
また、本発明の陰極構体は、前記連結部材を備える陰極スリーブ構造体と、当該陰極スリーブ構造体を取り囲み、そのほぼ中心に当該陰極スリーブ構造体が固定されるように前記支持部材の端部または前記連結部材に接合されている保持部材とを備えるとしてもよい。
【０１１８】
この陰極スリーブ構造体において、放射状に延出される支持部材の先端部、または連結部材を保持部材に接合することによって、収納部が保持部材に保持される。
つまり、元来陰極スリーブ構造体は、その機能上、熱損失を抑えるために支持部材が薄く形成されているが、従来の陰極スリーブ構造体の場合、保持部材に接合されるまでは、支持部材の根元から先が自由に変形できる状態にあるのに対して、上記支持部材は、隣り合う支持部材と根元より先で連結されているので、陰極スリーブ構造体が保持部材に接合されるまで、連結部材により支持部材の動きが抑制されると共に、支持部材に加わった外力が他の支持部材へと分散されるため、支持部材の変形が抑制される。
【０１１９】
したがって、陰極構体の製造工程においても、支持部材の変形により使用不可となる陰極スリーブ構造体が減少するため、陰極構体の製造時における歩留性が向上される。
また、本発明の陰極構体は、前記延長部材を備える陰極スリーブ構造体と、当該陰極スリーブ構造体を取り囲み、そのほぼ中心に当該陰極スリーブ構造体が固定されるように前記支持部材の端部または前記延長部材に接合されている保持部材とを備えるとしてもよい。
【０１２０】
これにより、陰極スリーブ構造体が保持部材に接合されるまで、延長部材により支持部材の動きが抑制されると共に、支持部材に加わった外力が他の支持部材へと分散されるため、支持部材の変形が抑制される。
つまり、陰極構体の製造工程においても、支持部材の変形により使用不可となる陰極スリーブ構造体が減少するため、陰極構体の製造時における歩留性が向上される。
【０１２１】
また、本発明の陰極構体は、前記段差部を有する陰極スリーブ構造体と、当該陰極スリーブ構造体を取り囲み、そのほぼ中心に当該陰極スリーブ構造体が固定されるように前記支持部材の端部に接合されている保持部材とを備えるとしてもよい。
支持部材の屈曲部分の肉厚が他の部分よりも厚くなっていることにより、亀裂が発生し難くなっている陰極スリーブ構造体が陰極構体の構成部材として用いられる。
また、本発明の陰極線管装置は、上記陰極構体を有する電子銃を備えることを特徴とする。
【０１２２】
これにより、陰極線管装置に使用される陰極構体の歩留性が向上される。
即ち、陰極線管装置としての歩留性も向上される。
また、本発明の陰極スリーブ基板は、陰極スリーブ構造体を製造する際の元材となる陰極スリーブ基板であって、金属薄板表面から筒状に突出している複数の収納部材と、長尺状をなし、前記金属薄板上において、それぞれ前記収納部材の根元部分の周縁に端を発して放射状に延びている複数の支持部材とを有することを特徴とする。
【０１２３】
これにより、収納部材と支持部材とが金属薄板上に複数形成されているため、金属薄板の一部を支持することで、収納部材と支持部材とを直接支持することなく、これら収納部材及び支持部材の保管、搬送がなされる。
つまり、収納部材及び支持部材に直接外力が加わり難くなる。
さらに、前記金属薄板上における収納部材及び支持部材の各位置が決まっているため、このような形態のままこれらに対して自動機を用いて処理を行なう場合、これらの位置決めが容易になる。
【０１２４】
また、前記陰極スリーブ基板は、さらに、同一の収納部材の根元部分に端を発している前記支持部材同士を連結する複数の連結部材を有するとすることもできる。
これにより、収納部材と支持部材と連結部材との組を金属薄板から分離しても、連結部材の存在により支持部材の変形が抑制される。
【０１２５】
また、前記陰極スリーブ基板は、さらに、前記各支持部材から延出され、同一の収納部材の根元部分に端を発して隣り合う支持部材から延出されたものの一部同士が近接する複数の延長部材を有するとすることもできる。
これにより、収納部材と支持部材と延長部材との組を金属薄板から分離しても、延長部材の存在により支持部材の変形が抑制される。
【０１２６】
また、本発明の陰極スリーブ基板の製造方法は、陰極スリーブ構造体を製造する際の元材となる陰極スリーブ基板の製造方法であって、金属薄板を部分的に変形させて突出させることにより、筒状の収納部材を当該金属薄板上に形成する収納部材形成ステップと、前記金属薄板の一部を除去することにより、前記収納部材の根元部分の周縁に端を発して放射状に延びる長尺状の複数の支持部材を形成する支持部材成形ステップと、前記金属薄板の一部を除去することにより、同一の収納部材の根元部分に端を発している前記支持部材同士を連結する連結部材を収納部材毎に形成する連結部材成形ステップとを有することを特徴とする。
【０１２７】
これにより、収納部材、支持部材及び連結部材は、金属薄板を部分的に変形させ、その一部を除去することにより形成される。
つまり、収納部材と支持部材と連結部材とを接合する工程がなく、これらが一体成形されるため、前記陰極スリーブ基板が容易に作成される。
また、前記収納部材形成ステップでは、前記収納部材が、前記金属薄板上に複数形成され、前記支持部材成形ステップでは、前記複数の支持部材が、前記収納部材毎に形成され、前記連結部材成形ステップでは、前記連結部材が、前記収納部材毎に形成されるとしてもよい。
【０１２８】
これにより、収納部材、複数の支持部材及び連結部材の組が複数あっても、これら組は、１つの金属薄板の単位で保管、搬送される。
また、前記陰極スリーブ基板の製造方法は、さらに、前記収納部材、前記支持部材及び前記連結部材が複数形成された前記金属薄板をボビンに巻きつけるボビン巻回ステップを有するとすることもできる。
【０１２９】
これにより、収納部材、支持部材及び連結部材に外力が加わり難くなるため、製造時の品質を保ったまま、陰極スリーブ基板の保管、搬送がなされる。
また、本発明の陰極スリーブ基板の製造方法は、陰極スリーブ構造体を製造する際の元材となる陰極スリーブ基板の製造方法であって、金属薄板を部分的に変形させて突出させることにより、筒状の収納部材を当該金属薄板上に形成する収納部材形成ステップと、前記金属薄板の一部を除去することにより、前記収納部材の根元部分の周縁に端を発して放射状に延びる長尺状の複数の支持部材を形成する支持部材成形ステップと、前記金属薄板の一部を除去することにより、前記各支持部材から延出され、隣り合う支持部材から延出された一部分同士が近接する延長部材とを形成する延長部材成形ステップとを有するとしてもよい。
【０１３０】
これにより、収納部材、支持部材及び延長部材は、金属薄板を部分的に変形させ、その一部を除去することにより形成される。
つまり、収納部材と支持部材と延長部材とを接合する工程がなく、これらが一体成形されるため、前記陰極スリーブ基板が容易に作成される。
また、前記収納部材形成ステップでは、前記収納部材が、前記金属薄板上に複数形成され、前記支持部材成形ステップでは、前記複数の支持部材が、前記収納部材毎に形成され、前記延長部材成形ステップでは、前記延長部材が、前記収納部材毎に形成されるとしてもよい。
【０１３１】
これにより、収納部材、複数の支持部材及び延長部材の組が複数あっても、これら組は、１つの金属薄板の単位で保管、搬送される。
また、前記陰極スリーブ基板の製造方法は、さらに、前記収納部材、前記支持部材及び前記延長部材が複数形成された前記金属薄板をボビンに巻きつけるボビン巻回ステップを有するとすることもできる。
【０１３２】
これにより、収納部材、支持部材及び延長部材に外力が加わり難くなるため、製造時の品質を保ったまま、陰極スリーブ基板の保管、搬送がなされる。
また、本発明の陰極スリーブ基板の製造方法は、陰極スリーブ構造体を製造する際の元材となる陰極スリーブ基板の製造方法であって、金属薄板を部分的に変形させて突出させることにより、筒状の収納部材を当該金属薄板上に形成する収納部材形成ステップと、金属薄板または前記収納部材を部分的に変形させることにより、前記収納部材の根元周縁の肉厚を他の部分よりも厚くして段差を形成する段差形成ステップと、前記金属薄板の一部を除去することにより、前記段差の周縁に端を発して放射状に延びる長尺状の複数の支持部材を形成する支持部材成形ステップとを有するとしてもよい。
【０１３３】
これにより、収納部材、支持部材及び連結部材は、金属薄板を部分的に変形させ、その一部を除去することにより形成される。
つまり、収納部材と支持部材と連結部材とを接合する工程がなく、これらが一体成形されるため、前記陰極スリーブ基板が容易に作成される。
また、前記収納部材形成ステップでは、前記収納部材が、前記金属薄板上に複数形成され、前記支持部材成形ステップでは、前記複数の支持部材が、前記収納部材毎に形成される。
【０１３４】
これにより、収納部材及び複数の支持部材の組が複数あっても、これら組は、１つの金属薄板の単位で保管、搬送される。
また、本発明の陰極構体の製造方法は、前記連結部材を有する陰極スリーブ基板を用いて陰極構体を製造する方法であって、前記金属薄板の一部を切断することにより、前記金属薄板から前記収納部材、前記支持部材及び前記連結部材の組を分離する分離ステップと、前記分離後において、筒状の保持部材と、前記支持部材の端部または前記連結部材とを溶接する溶接ステップとを少なくとも有することを特徴とする。
【０１３５】
これにより、支持部材の端部または連結部材とを保持部材に溶接することにより、外力が直接支持部材に加わり難くなるため、支持部材の変形が防止される。また、前記分離ステップは、前記陰極スリーブ基板から前記溶接ステップに至るまでに必要とされる全工程のうち、時系列的にみて後半の工程において実行されるとすることもできる。
【０１３６】
これにより、陰極スリーブ基板から溶接ステップに至るまでの大半の工程が、陰極スリーブ基板に収納部材、支持部材及び連結部材もしくは延長部材が含まれている状態となっているため、収納部材、支持部材及び連結部材もしくは延長部材以外の陰極スリーブ基板上に、支持又は拘束する場所が確保でき、収納部材、支持部材及び連結部材もしくは延長部材に直接外力が加わり難い状態となるため、歩留性がさらに向上される。
【０１３７】
また、前記分離が行なわれるまで、前記金属薄板上における収納部材及び支持部材の各位置が決まっているため、これらの位置決めが容易になる。
また、前記陰極構体の製造方法は、さらに、前記分離ステップの前に、前記連結部材の一部を切断または切り欠くことにより、少なくとも１つスリットを形成するスリット形成ステップを有するとすることもできる。
【０１３８】
これにより、スリットの存在により、連結部材及び支持部材におけるプレス成形上の自由度が向上される。
また、本発明の陰極構体の製造方法は、前記延長部材を有する陰極スリーブ基板を用いて陰極構体を製造する方法であって、前記金属薄板の一部を切断することにより、前記金属薄板から前記収納部材、前記支持部材及び前記延長部材の組を分離する分離ステップと、前記分離後において、筒状の保持部材と、前記支持部材または前記延長部材とを溶接する溶接ステップとを少なくとも有するとしてもよい。
【０１３９】
これにより、支持部材の端部または延長部材とを保持部材に溶接することにより、外力が直接支持部材に加わり難くなるため、支持部材の変形が防止される。また、本発明の陰極構体の製造方法は、陰極スリーブ基板を用いて陰極構体を製造する陰極構体の製造方法であって、前記金属薄板の一部を切断することにより、前記金属薄板から前記収納部材及び前記支持部材の組を分離する分離ステップと、前記支持部材の端部を固定し、前記収納部材における前記段差の端面を力点として、前記収納部材の突出している先端から根元へと向かう方向に押し下げることにより当該支持部材の一部を折り曲げる折り曲げステップと、前記分離後において、筒状の保持部材と、前記支持部材または前記延長部材とを溶接する溶接ステップとを少なくとも有するとしてもよい。
【０１４０】
前記折り曲げステップにおいて、肉厚の厚い段差の端面を力点として、前記折り曲げを実行しているので、支持部材の折り曲げ箇所における亀裂の発生が軽減される。
【図面の簡単な説明】
【図１】第１の実施形態での陰極線管装置における陰極構体の搭載位置を示す図である。
【図２】第１の実施形態における陰極構体の構成を示す図である。
【図３】（ａ）は、陰極スリーブ基板成形工程の概略図である。
（ｂ）は、黒化熱処理工程の概略図である。
（ｃ）は、第１溶接処理工程の概略図である。
（ｄ）は、電子放射物質層形成工程の概略図である。
（ｅ）は、分離工程の概略図である。
（ｆ）は、折り曲げ工程の概略図である。
（ｇ）は、第２溶接処理工程の概略図である。
（ｈ）は、ヒータ溶接工程の概略図である。
【図４】（ａ）は、陰極スリーブ基板２２を上方から見た図である。
（ｂ）は、陰極スリーブ基板２２を側面から見た図である。
（ｃ）は、陰極スリーブ基板２２の保管及び搬送形態を示す図である。
【図５】黒化熱処理工程を示す図である。
【図６】第１溶接処理工程を示す図である。
【図７】（ａ）は、第１の実施形態での折り曲げ工程投入直前における中間生成物の概略図である。
（ｂ）は、第１の実施形態での折り曲げ工程において、中間生成物が曲げ加工治具にセットされる状況を示す図である。
（ｃ）は、第１の実施形態での折り曲げ工程において、曲げ加工治具の動きを説明する図である。
（ｄ）は、第１の実施形態での折り曲げ工程において、曲げ加工治具の動き及び中間生成物の形状変化を説明する図である。
（ｅ）は、第１の実施形態における折り曲げ工程終了後の中間生成物の形状を示す図である。
【図８】
外縁連結部材１４ｃの配置に関する変形例を示す図である。
【図９】
外縁連結部材１４ｃの形状に関する変形例を示す図である。
【図１０】
陰極スリーブ基板２２の形状に関する変形例を示す図である。
【図１１】
陰極構体の分離工程における実施内容の変形例を示す図である。
【図１２】
陰極構体の溶接工程における実施内容の変形例を示す図である。
【図１３】
陰極構体の分離工程における実施内容の変形例を示す図である。
【図１４】
初期（動作直後）の陰極構体の温度を示す図である。
【図１５】
動作開始から２０００時間が経過した後の陰極構体の温度を示す図である。
【図１６】
陰極構体の電子ビーム電流を示す図である。
【図１７】
出画時間を示す図である。
【図１８】
第２の実施形態における陰極構体の構成を示す図である。
【図１９】
（ａ）は、第２の実施形態における陰極構体の陰極スリーブ前駆体を上方からみた図である。
（ｂ）は、第２の実施形態における陰極構体の陰極スリーブ前駆体を側面からみた図である。
【図２０】（ａ）は、第２の実施形態での折り曲げ工程投入直前における中間生成物の概略図である。
（ｂ）は、第２の実施形態での折り曲げ工程において、中間生成物が曲げ加工治具にセットされる状況を示す図である。
（ｃ）は、第２の実施形態での折り曲げ工程において、曲げ加工治具の動きを説明する図である。
（ｄ）は、第２の実施形態での折り曲げ工程において、曲げ加工治具の動き及び中間生成物の形状変化を説明する図である。
【図２１】フランジ部の高さを支持部の板厚で除した値と熱損失量との関係を示す図である。
【図２２】従来の陰極構体の概略図である。
【図２３】従来の溶接の状況を説明する図である。
【符号の説明】
１ 陰極線管装置
１０ 陰極構体
１１ ヒータ
１１ 特開平
１２ 陰極本体部材
１２ａ 中間生成物
１３ 陰極保持部材
１４ 陰極スリーブ構造体
１４ａ ヒータ収納部材
１４ｂ 陰極スリーブ支持部材
１４ｃ 外縁連結部材
１４ｄ 陰極スリーブ前駆体
１４ｅ ヒータ収納部材前駆体
１４ｆ 支持部材前駆体
１４ｇ 外縁連結部材前駆体
１４ｈ スリット
１４ｉ 外縁延長部材
１４ｊ 有蓋部材
１５ キャップ状部材
１６ 電子放射物質層
２０ 帯
２１ パーティングライン
２２ 陰極スリーブ基板
２４ ボビン
２５ マスキング材
２６ 噴射ノズル
２７ 電気炉
２８ａ 加工治具
２８ｂ 加工治具
２８ｃ 加工治具
２８ｄ 突起部
３０ 陰極構体
３２ 陰極本体部材
３２ａ 中間生成物
３３ 陰極保持部材
３４ 陰極スリーブ構造体
３４ａ ヒータ収納部材
３４ｂ 陰極スリーブ支持部材
３４ｂ 直接陰極スリーブ支持部材
３４ｃ 外縁連結部材
３４ｄ 陰極スリーブ前駆体
３４ｅ ヒータ収納部材前駆体
３４ｆ 支持部前駆体
３４ｇ 外縁連結部材前駆体
３４ｋ フランジ部
３８ａ 加工治具
３８ｂ 加工治具
３８ｃ 加工治具
３８ｄ 先端部
３８ｅ 突起部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cathode structure used for a cathode ray tube device such as a cathode ray tube.
[0002]
[Prior art]
As shown in FIG. 22, in a conventional cathode assembly 100, a cap-shaped member 103 is provided on a cylindrical cathode sleeve 102 for accommodating a heater 101, and an outer surface of the cap-shaped member 103 is coated with an electron emitting material. An electron emitting material layer 104 of a certain alkaline earth metal or the like is formed.
[0003]
Then, both ends of the three cathode sleeve supporting members 106 are connected to the side surface of the cathode sleeve 102 and the cathode holding member so that the cylindrical cathode sleeve 102 and the cylindrical cathode holding member 105 are fixed at substantially concentric positions. 105 is welded to the upper end.
The cathode assembly 100 is produced through the following six steps.
(1. First welding process)
A part of the three cathode sleeve supporting members 106 is welded to the cathode sleeve 102. (2. Blackening heat treatment step)
After the metal particles are sprayed on the inner surface of the cathode sleeve 102, it is baked and the surface is blackened.
(3. Second welding process)
The cap-shaped member 103 is welded to the opening of the cathode sleeve 102.
(4. Forming process)
An electron emitting material layer 104 is sprayed on the outer surface of the cap-shaped member 103 by spraying or the like.
(5. Third welding process)
The other end of the above-described cathode sleeve support member 106 is welded to one cylindrical end surface of the cathode holding member 105.
(6. Heater insertion process)
The heater 101 is inserted into the inside of the cathode sleeve 102, and the cathode sleeve 102 and the heater 101 are welded.
[0004]
Here, for convenience, the intermediate product after the forming step is referred to as a cathode main body member 107.
Similarly, although not shown, the intermediate product after the third welding step is referred to as a heater housing 108, and the intermediate product after the first welding step to which the above-described cathode sleeve support member 106 is attached for the first time. This is referred to as a cathode sleeve structure 109.
As described above, the conventional cathode assembly 100 has been subjected to a number of treatments and has been accurately manufactured. (For example, see Patent Document 1)
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. H11-213857
[0006]
[Problems to be solved by the invention]
Incidentally, the cathode sleeve supporting member 106 in the conventional cathode assembly 100 is formed of a Ni—Fe material having a low thermal conductivity in order to reduce heat loss caused by heat conduction from the cathode sleeve 102 to the cathode holding member 105. It is a long body having a small cross-sectional area with a width of about 0.3 mm and a plate thickness of about 0.1 mm, and has a characteristic that it is easily deformed when an external force is applied.
[0007]
Such a soft cathode sleeve supporting member 106 is welded to the high-strength cathode holding member 105 in the above-described third welding step, so that it is difficult for external force to be applied. When the main body member 107 is stored, transported, and placed on a jig or the like, the main body member 107 may be deformed by an external force applied to the cathode sleeve support member 106.
[0008]
In particular, since the third welding process is a welding process using an automatic machine, it is necessary to strictly perform welding positioning, and parts for aligning the cathode main body member 107 in order to obtain an accurate position and orientation of the cathode main body member 107 Although a feeder is used, when passing through the inside of the parts feeder or when placing the cathode main body member 107 on the welding rack from the parts feeder, an external force is easily applied and the cathode sleeve supporting member 106 is easily deformed. There's a problem.
[0009]
If the deformed cathode structure 100 is used for a product, the position of the cap-shaped member 103 is shifted, the distance between the electron emitting material layer 104 and the control electrode (G1 electrode) deviates from a design value, and a desired cut is performed. The off voltage cannot be obtained.
For this reason, the deformed cathode main body member 107 is discarded before welding is performed.
[0010]
In addition, if the positioning in the third welding step is not performed correctly, it is impossible to perform welding at a regular welding position as shown in FIG. 23, that is, there is a possibility that a welding position shift occurs and defective welding occurs. There is.
The heater housing 108 in which such poor welding has occurred is discarded after welding.
[0011]
Therefore, the present invention has been made to solve the above problems, and a cathode sleeve structure capable of improving the yield during the production of the cathode structure, a cathode structure having a good yield, and a good yield. It is an object of the present invention to provide a cathode sleeve substrate as a base material when manufacturing a cathode ray tube device and a cathode sleeve structure capable of improving yield.
It is another object of the present invention to provide a method for manufacturing the above-described cathode sleeve substrate and a method for manufacturing a cathode structure capable of improving the yield.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the cathode sleeve structure of the present invention is a cathode sleeve structure that houses a heater, has a tubular shape, and a storage member having one open end, and has a long shape. A plurality of support members extending radially from the opening periphery of the storage member and integrally formed with the storage member, connecting the support members to each other, and a connection member integrally formed with the support member. A cathode sleeve structure accommodating a heater, wherein the housing member has a cylindrical shape and has one end opened, and a radially extending from the opening periphery of the storage member; And a plurality of support members integrally formed with the support member, each of which is extended from each of the support members, and a portion of the one extended from an adjacent support member is close to each other, and is integrally formed with the support member. Multiple And a cathode sleeve structure accommodating the heater, wherein the cathode sleeve structure has a cylindrical shape, has a first end and a second end, and has an opening at the first end. A storage member having a step formed by the thickness of the peripheral portion of the opening being thicker than the other portions, and a long shape, which is extended radially from the peripheral edge of the step. A plurality of support members that are integrally formed with the storage member and that are bent toward the second end near the boundary with the step portion.
[0013]
In order to achieve the above object, the cathode structure of the present invention surrounds the cathode sleeve structure having a connecting member and the cathode sleeve structure, and the cathode sleeve structure is fixed substantially at the center thereof. And a holding member joined to the end of the supporting member or the connecting member, or the cathode sleeve structure having an extension member, and surrounding the cathode sleeve structure, and substantially at the center thereof. And a holding member joined to the end of the support member or the extension member so that the cathode sleeve structure is fixed.
[0014]
Further, a cathode ray tube device according to the present invention includes an electron gun having the above-described cathode structure.
Further, the cathode sleeve substrate of the present invention is a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure, a plurality of storage members projecting in a cylindrical shape from the surface of the metal thin plate, and a long shape. And a plurality of support members extending radially from the periphery of the base of the storage member on the thin metal plate.
[0015]
Further, the method for manufacturing a cathode sleeve substrate of the present invention is a method for manufacturing a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure, by partially deforming a metal thin plate and projecting it. A storage member forming step of forming a cylindrical storage member on the metal sheet; and removing a part of the metal sheet to elongate radially extending from a periphery of a root portion of the storage member. A supporting member forming step of forming a plurality of supporting members, and a connecting member for connecting the supporting members originating from a root portion of the same storing member by removing a part of the metal sheet. A method of manufacturing a cathode sleeve substrate as a base material for manufacturing a cathode sleeve structure, wherein the metal thin plate is partially changed. The storage member forming step of forming a cylindrical storage member on the metal sheet by projecting the metal sheet, and removing a part of the metal sheet to generate an edge at the periphery of the base portion of the storage member. A supporting member forming step of forming a plurality of elongate supporting members extending radially, and by removing a part of the thin metal plate, extending from each of the supporting members and extending from an adjacent supporting member. And an extension member forming step of forming an extension member in which the portions are close to each other, or a method of manufacturing a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure, comprising: A storage member forming step of forming a cylindrical storage member on the metal thin plate by partially deforming and projecting the thin plate, and partially deforming the metal thin plate or the storage member. By making the thickness of the base peripheral edge of the storage member thicker than other portions to form a step, and by removing a part of the metal sheet, an edge is formed at the peripheral edge of the step. And forming a plurality of elongated support members that radiate and extend radially.
[0016]
Further, the method for manufacturing a cathode assembly according to the present invention is a method for manufacturing a cathode assembly using the cathode sleeve substrate having a connecting member, wherein a part of the metal sheet is cut to remove the metal sheet from the metal sheet. A separation step of separating the set of the storage member, the support member, and the connection member, and a welding step of welding the cylindrical holding member and an end of the support member or the connection member after the separation. A method of manufacturing a cathode assembly using the cathode sleeve substrate having an extension member, wherein a part of the metal sheet is cut to remove the storage from the metal sheet. A separating step of separating a member, a set of the support member and the extension member, and after the separation, a cylindrical holding member, the support member or the extension member, And a method of manufacturing a cathode assembly using a cathode sleeve substrate having the above-mentioned step, wherein a part of the metal sheet is cut. Thereby, a separation step of separating the set of the storage member and the support member from the thin metal plate, fixing an end of the support member, and using the end face of the step in the storage member as a power point, projecting the storage member. A bending step of bending a part of the support member by pressing down in a direction from the tip toward the root, and a welding step of welding the cylindrical holding member and the support member or the extension member after the separation. At least.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a method for manufacturing the cathode structure according to the first embodiment will be described with reference to the drawings.
(1st Embodiment)
(Constitution)
As shown in FIG. 1, the cathode structure 10 is built in the electron gun of the cathode ray tube device 1.
[0018]
As shown in FIG. 2, the cathode assembly 10 has a heater 11 at the center thereof, and a cathode main body member 12 is provided so as to surround the heater 11. A cylindrical cathode holding member 13 is provided as an example of the holding member, and one end face of the cathode holding member 13 and an outer edge of the cathode main body member 12 are fixed by welding.
[0019]
In order to house the heater 11 described above, the cathode main body member 12 is placed on a cathode sleeve structure 14 having a cylindrical central portion so that one end of the cylindrical portion is covered with Ni having a purity of 99.9%. A cap-like member 15 made of a material is fitted and welded, and an alkaline earth metal containing BaO (barium oxide) as a main component, that is, an electron emitting material layer 16 is formed on the outer surface of the cap-like member 15. Are laminated.
[0020]
More specifically, the cathode sleeve structure 14 is made of a Ni material having a purity of 99.9%, and is formed of a support member having a small plate thickness from three lower ends of the heater housing member 14a as an example of a cylindrical housing member. A cathode sleeve supporting member 14b as an example is radially extended, and further, a ring-shaped outer edge connecting member 14c as an example of a connecting member that connects the extended ends of the respective cathode sleeve supporting members 14b. The outer edge connecting member 14c and the above-described cathode holding member 13 are spot-welded at three places.
[0021]
The inner surface of the heater housing member 14a is subjected to a blackening heat treatment for blackening the surface.
Incidentally, the purpose of the blackening is to make it easy to absorb the heat from the heater and to obtain a sufficient cathode operating temperature with a small heater power.
Each cathode sleeve support member 14b extends from the heater housing member 14a and is bent at an acute angle toward the cap-like member 15 near the boundary with the heater housing member 14a.
[0022]
Each cathode sleeve support member 14b has an opening angle of 120 degrees when viewed from an extension of the central axis.
The shape of the outer edge connecting member 14 c substantially matches the ring-shaped cross section at the end of the cathode holding member 13, and is spot-welded to the cathode holding member 13 at three places (× portions in FIG. 2) on the outer edge connecting member 14 c. ing.
[0023]
The above-mentioned heater accommodating member 14a, cathode sleeve supporting member 14b, and outer edge connecting member 14c are integrally formed by performing press working, punching, or the like on a single thin Ni band.
That is, the heater accommodating member 14a, the cathode sleeve supporting member 14b, and the outer edge connecting member 14c are not joined to each other by welding as in the related art.
[0024]
The above-described outer edge connection member 14c functions to suppress the movement of the cathode sleeve support member 14b.
For example, when an external force is applied to any one of the three cathode sleeve supporting members 14b, the outer edge connecting member 14c disperses the external force to the other cathode sleeve supporting members 14b. Increases resistance.
[0025]
Also, by making the shape of the upper end portion of the cathode holding member 13 and the shape of the outer edge connecting member 14c of the cathode sleeve structure 14 substantially the same ring shape, the cathode sleeve supporting member 14b and the cathode holding member 13 are concentric. If so, it is possible to weld them.
That is, even if the positional relationship between the cathode sleeve support member 14b and the cathode holding member 13 is shifted in the circumferential direction, a welding surface can be secured, and welding defects do not occur.
(Production method)
Hereinafter, a method for manufacturing the cathode structure 10 according to the first embodiment will be described.
[0026]
As a manufacturing process of the cathode assembly 10, first, there is a cathode sleeve substrate forming process of three-dimensionally forming a plurality of cathode sleeve precursors 14 d, which will be described later, on a thin Ni band 20 and storing the same in a bobbin 24 (FIG. 3). (A)).
Then, as a subsequent step, there is a blackening heat treatment step of blackening a portion serving as a cylindrical container for housing the heater, that is, the inner surface of the precursor of the heater housing member 14a (see FIG. 3B).
[0027]
Further, as a subsequent step, there is a first welding processing step of welding the cap-shaped member 15 to the opening of the precursor of the heater housing member 14a (see FIG. 3C). There is an electron emitting material layer forming step of applying an electron emitting material on the upper surface of the cap-like member 15 and stacking the electron emitting material layer 16 (see FIG. 3D).
[0028]
Further, as a subsequent step, there is a separation step of separating a portion used as the cathode structure 10 from the Ni band (see FIG. 3E).
That is, until the separation step, the processing target in each of the above-described steps is processed while being held in the Ni band.
Then, as a step following the above-described separation step, there is a bending step of bending the cathode sleeve supporting member 14b to form the cathode main body member 12 (see FIG. 3 (f)). There is a second welding process step of welding the member 12 and the cathode holding member 13 (see FIG. 3 (g)).
[0029]
Subsequently, there is a heater welding step of forming a cathode structure 10 by inserting a heater into the cathode sleeve structure 14 and welding the same (see FIG. 3 (h)).
Hereinafter, each step will be described in detail.
(1. Cathode sleeve substrate molding process)
First, a Ni band having a thickness of 0.1 mm made of a Ni material having a purity of 99.9% is formed into a cup shape by press working such as deep drawing, the upper surface thereof is cut, one end thereof is opened, and the heater accommodating member 14a is formed. (Hereinafter, referred to as “heater housing member precursor 14e”).
[0030]
Then, in the above-described Ni band, a portion to be the above-described cathode sleeve support member 14b (hereinafter, referred to as “support member precursor 14f”) and a portion to be the above-described outer edge connection member 14c (hereinafter, “the outer edge connection member precursor”). 14g).), The heater housing member precursor 14e, the support member precursor 14f, and the outer edge connecting member precursor 14g were integrally formed as shown in FIG. 3A. A plurality of precursors of the cathode sleeve structure 14 (hereinafter, referred to as “cathode sleeve precursor 14d”) are formed.
[0031]
The step of forming the cathode sleeve precursor 14d on the thin metal strip in this way is called a cathode sleeve substrate forming step, and the thin metal strip on which these are formed is called the cathode sleeve substrate 22.
As shown in FIGS. 4A and 4B, after the cathode sleeve substrate forming step, the above-described heater housing member precursor 14e has already been formed into a three-dimensional shape by deep drawing.
[0032]
As shown in FIG. 4C, the shape of the heater housing member precursor 14e, the support member precursor 14f, and the outer edge connecting member precursor 14g is maintained in the cathode sleeve substrate 22 on which the plurality of cathode sleeve precursors 14d are formed. It is wound around the bobbin 24 with the tension as much as possible, and is stored and transported.
(2. Blackening heat treatment step)
Next, a blackening heat treatment step of performing a heat treatment for blackening the inner surface of the heater housing member precursor 14e will be described.
[0033]
After being unrolled from the state wound around the bobbin 24, the cathode sleeve substrate 22 is covered with a masking material 25 at a predetermined portion of the cathode sleeve substrate 22 as shown in FIG. -Alumina powder is applied only to the inner surface of the heater housing member precursor 14e, the powder is sintered by the electric furnace 27, and the inner surface of the heater housing member precursor 14e is blackened.
[0034]
More specifically, the above-mentioned tungsten-alumina powder is a combination of a high melting point metal and an inorganic binder composed of tungsten powder having an average particle diameter of 1 μm and sintered alumina having an average particle diameter of 5 to 10 μm. is there.
In the case where the main component of the cathode sleeve substrate 22 is chromium, it is not necessary to apply tungsten-alumina powder, and blackening can be achieved only by performing heat treatment.
(3. First welding process)
Next, as shown in FIG. 6, a cap member 15 made of Ni containing a small amount of a reducing agent is fitted into the opening of the heater housing member precursor 14e, and the fitted cap member 15 and the heater housing member are fitted. Spot welding is performed with the precursor 14e.
[0035]
At this time, the cathode sleeve precursor 14d remains integral with the cathode sleeve substrate 22.
(4. Electron emitting material layer forming step)
Thereafter, an alkaline earth metal, which is an electron emitting material, is sprayed onto the outer surface of the cap-like member 15 covered with the masking member by spraying or the like to be laminated, thereby forming an oxide cathode, that is, an electron emitting material layer 16.
(5. Separation step)
As shown in FIG. 3E, the parting line 21 (see FIG. 4A) is cut to separate the intermediate product 12a shown in FIG. 7A from the cathode sleeve substrate 22.
[0036]
In addition, from the viewpoint of preventing the deformation of the cathode sleeve supporting member 14b, this separation step is at least the n / 2th step or later of all n (n is an even number) steps or all n (n is an odd number). It is preferable that the process be performed in at least the (n + 1) / 2th step, that is, the latter half of the steps.
(6. Bending process)
As shown in FIG. 7B, the intermediate product 12a shown in FIG. 7A is set in a concave portion of the bending jig 28a under negative pressure.
[0037]
The cross section of the intermediate product 12a shown in FIGS. 7B to 7D is an AA cross section of the intermediate product 12a shown in FIG. 7A.
Then, as shown in FIG. 7C, the bending jig 28b descends to a position where the bending jig 28b contacts the bending jig 28c while maintaining the relative positions of the bending jig 28a and the bending jig 28b. .
[0038]
Further, as shown in FIG. 7D, the bending jig 28a descends.
Thereby, the intermediate product 12a is pushed down, and as a result, the protrusion 28d of the bending jig 28c is inserted into the heater accommodating member 14a of the intermediate product 12a, and the support member precursor 14f is moved near the base. It is bent at an acute angle and plastically deforms to form a cathode main body member 12 as shown in FIG.
(7. Second welding process)
Next, a second welding process for welding the ring-shaped outer edge connecting member 14c of the cathode main body member 12 and the cylindrical cathode holding member 13 will be described.
[0039]
First, as shown in FIG. 3 (g), the outer edge connecting member 14c of the cathode main body member 12 is placed so as to overlap the ring-shaped end face of the cathode holding member 13, and then three places are welded by an automatic machine.
Thereby, the outer edge connecting member 14c of the cathode main body member 12 and the cathode holding member 13 are fixed by welding.
[0040]
In other words, in the above-described second welding process, the open ends of the three cathode sleeve supporting members 106 and the cylindrical end surfaces of the cathode holding members 105 are not spot-welded as in the related art, but a ring-shaped outer edge connecting member 14c. And the cylindrical end face of the cathode holding member 13 are spot-welded.
As a result, even if a rotation shift occurs between the cathode main body member 12 and the cathode holding member 13 with respect to the longitudinal center axis of the heater housing member 14a, the outer edge connecting member 14c is always provided on the end face of the cathode holding member 13. Are overlapped, so that the welding can be performed reliably.
(8. Heater welding process)
As shown in FIG. 3H, the heater 11 is inserted into the cathode sleeve structure 14 of the cathode main body member 12, and the heater 11 and the cathode main body member 12 are fixed by welding.
[0041]
Thereby, the cathode structure 10 is completed.
As described above, the cathode structure 10 undergoes the above-described eight steps until it is completed. Until the fifth step of the separation step, the support member precursor 14f, which is structurally weak, is formed. It is stored and transported as the cathode sleeve substrate 22 in the form of a member to which external force is hardly applied directly.
[0042]
That is, the deformation of the soft support member precursor 14f or the cathode sleeve support member 14b is prevented without the need for a special storage jig and transport jig. There is no opportunity to place it on a jig.
In other words, conventionally, many operations of grasping a component and placing it in a predetermined place have been performed. However, in the manufacturing method according to the first embodiment, such an operation is hardly necessary, and during these operations, Deformation of the cathode sleeve supporting member 14b, which easily occurs, can be avoided.
[0043]
Further, in the above-described separation step, even after the intermediate product 12a is taken out, the movement of the cathode sleeve support member 14b is suppressed when an external force is applied due to the presence of the outer edge connecting member 14c. Therefore, deformation of the cathode sleeve support member 14b during storage and transport can be prevented.
(Yield improvement effect confirmation test)
The yield of the cathode structure 10 to which the configuration and the manufacturing method as described above are applied will be described.
[0044]
The inventors made a prototype by the configuration and manufacturing method of the cathode structure described in the first embodiment, and (1) yield associated with deformation of the cathode sleeve support member 14b in the blackening heat treatment step, (2) ▼ In the second welding process, when the cathode main body member 12 and the cathode holding member 13 are fixed by welding, the cathode main body member 12 becomes unusable due to deformation of the cathode sleeve supporting member 14b when the cathode main body member 12 is placed on the welding device. Verification was performed on (3) the yield associated with deformation of the cathode sleeve support member 14b during the welding, and (4) the yield associated with poor welding during the welding.
[0045]
Here, the specifications of the cathode structure 10 used for the above-described verification are shown below.
The cathode sleeve structure 14 is formed using Ni having a thickness of 0.05 mm.
The outer diameter of the heater housing member 14a is 1.6 mm, the width of the cathode sleeve support member 14b is 0.3 mm, the length is 3 mm, and the ring width of the ring-shaped outer edge connecting member 14c is 0.2 mm. is there.
[0046]
A cap-like member 15 is fitted to the cathode sleeve structure 14 by welding.
The specifications of the conventional cathode structure 100 used for the above-described verification are shown below.
In the conventional cathode assembly 100, the three cathode sleeve supporting members 106 are formed as separate components from the cathode sleeve 102 without providing the outer edge connecting member 14c as shown in FIG. The width is 0.3 mm, the length is 2.7 mm, and the materials and dimensions of the other components are the same as those of the above-described cathode structure 10.
[0047]
Table 1 is a diagram showing the above verification results.
[0048]
[Table 1]

[0049]
As shown in Table 1, in each of the above steps (1) to (4), the yield of the cathode assembly 10 of the first embodiment is higher than that of the conventional cathode assembly 100.
In particular, (1) the effect of preventing deformation of the cathode sleeve support member 14b in the blackening heat treatment step is remarkable.
{Circle over (4)} As a factor of improvement in the yield in the welding process, the range that can be welded conventionally has been limited to only the end of the cathode sleeve support member 14b, whereas the cathode assembly 10 of the first embodiment has Since the entire outer edge connecting member 14c is in a weldable range, even if the welding position is shifted in the circumferential direction, welding can be performed without any problem.
[0050]
Further, the total yield of each of the steps (1) to (4) is 95.1% for the cathode assembly 10 of the first embodiment, and 55.2% for the conventional cathode assembly 100. With the configuration and manufacturing method of the cathode structure 10 according to the first embodiment, about twice the yield is obtained.
With the above configuration and manufacturing method, even when an external force is applied to the cathode sleeve supporting member 14b in the manufacturing process of the cathode assembly 10, the outer edge connecting member 14c disperses the external force to the other cathode sleeve supporting member 14b. , The deformation of the cathode sleeve support member 14b is prevented.
[0051]
In addition, with the manufacturing method as described above, the transport form of the intermediate product during the manufacturing process of the cathode assembly 10 becomes the cathode sleeve substrate 22 to which external force is unlikely to be applied, and the structurally weak cathode constituting the intermediate product The deformation of the sleeve support member 14b can be prevented, and as a result, the yield of the cathode assembly 10 can be improved.
(Modification)
In the first embodiment, the cathode sleeve support member 14b has a plate shape, but is not limited to this. For example, the cathode sleeve support member 14b may have a rod shape having a substantially circular cross section.
[0052]
Further, in the first embodiment, the outer shape of the upper end portion of the cathode holding member 13 is circular, but is not limited thereto, and may be, for example, rectangular.
In this case, the outer edge connecting member 14c of the cathode sleeve structure 14 has a rectangular frame shape corresponding to the shape of the upper end portion of the cathode holding member 13.
Further, in the first embodiment, the cathode holding member 13 and the outer edge connecting member 14c are welded. However, the present invention is not limited to this, and the outer edge connecting member 14c is connected to the cathode sleeve supporting member 14b as shown in FIG. The cathode sleeve supporting member 14b may be welded to the end of the cathode sleeve supporting member 14b and the end of the cathode sleeve supporting member 14b.
[0053]
In this case, as in the first embodiment, the external force applied to the cathode sleeve support member 14b due to the presence of the outer edge connecting member 14c has an effect of dispersing the external force to the other cathode sleeve support members 14b. Since no effect is obtained, it is necessary to more strictly control the positional relationship between the cathode sleeve supporting member 14b and the cathode holding member 13 during welding.
[0054]
Further, in the first embodiment, the outer edge connecting member 14c connects all the adjacent cathode sleeve supporting members 14b to each other. However, the present invention is not limited thereto. At least one pair of adjacent cathode sleeve support members 14b may be connected.
For example, the cathode sleeve support member 14b ₁ , 14b ₂ And 14b ₃ When there are three, the cathode sleeve support member 14b ₁ And 14b ₂ And the cathode sleeve support member 14b ₃ May not be connected to any of these cathode sleeve support members.
[0055]
In such a case, the cathode sleeve support member 14b ₁ And 14b ₂ In the above, since the external force applied to one of them is dispersed to the other connected cathode sleeve supporting member, the deformation of these cathode sleeve supporting members can be suppressed.
At this time, the cathode sleeve support member 14b ₃ Is the same as the conventional one, but since the resistance to deformation of the other two cathode sleeve supporting members is improved, the resistance to deformation is improved as a whole.
[0056]
Further, in the first embodiment, the outer edge connecting member 14c has a continuous ring shape. However, the present invention is not limited to this. For example, as shown in FIG. And each may be located on the circumference of the same circle, and adjacent outer edge connecting members 14c may be close to each other.
Here, for convenience, the gap between the adjacent portions is referred to as a slit 14h, and the outer edge connecting member 14c as an example of the separated extension member is referred to as an outer edge extending member 14i for convenience.
[0057]
That is, when an external force is applied to one certain cathode sleeve supporting member 14b, the cathode sleeve supporting member 14b is elastically deformed within a certain external force range, and the outer edge extension member 14i connected to the other two cathode sleeve supporting members 14b. As a result, the external force is dispersed to the other cathode sleeve support members 14b.
Then, when the external force is removed, the respective cathode sleeve support members 14b and the outer edge extension members 14i return to their original positions.
[0058]
The inventors have found that the width of the slit 14h may be set to 0.5 mm or less in order to exhibit the above-described effect.
Further, since the outer edge extension members 14i are cut off, the cathode sleeve support members 14b are not in communication with each other. Therefore, even if molding with large plastic deformation is performed, the cathode sleeve support members 14b and the outer edge extension members 14i may be cracked. Is less likely to occur, and the restriction on the shape in the molding process is eased.
[0059]
More specifically, when the ring-shaped outer edge connection member 14c is integrally formed with the heater housing member 14a and the cathode sleeve support member 14b as in the cathode structure 10 according to the first embodiment, the cathode sleeve support member 14b is Although the refraction angle θ (see FIG. 9) cannot be reduced, as shown in FIG. 9, in the outer edge extension member 14i having the slit 14h, the restriction on one side of each of the cathode sleeve support members 14b is released. The cathode sleeve supporting member 14b can be freely bent, and the refraction angle θ can be reduced.
[0060]
Further, instead of completely separating the outer edge connecting members 14c from each other as described above, a part of the outer edge connecting member 14c may be cut out in a groove shape.
Further, in the first embodiment, the outer edge connecting member 14c of the cathode sleeve structure 14 and the end face of the cathode holding member 13 are brought into close contact with each other, and a plurality of welding portions are welded. May be welded.
[0061]
Further, in the first embodiment, the cap-shaped member 15 and the heater housing member precursor 14e are formed separately, but as shown in FIG. 10, the process is performed after forming one Ni band into a cup shape. These may be integrally formed by omitting the cut on the upper surface of the cup.
That is, the covered member 14j functions as the cap-shaped member 15.
[0062]
In this case, the first welding step of welding the cap-like member 15 to the heater housing member precursor 14e becomes unnecessary, and the chance of deforming the cathode sleeve supporting member 14b is further reduced.
In the above description, the outer edge connecting member 14c and the cathode holding member 13 are welded. However, the present invention is not limited thereto, and for example, the following may be performed.
[0063]
That is, immediately before the second welding process step of welding the cathode main body member 12 and the cathode holding member 13, as shown in FIG. 11, the vicinity of the boundary between the outer edge connecting member 14c and the cathode sleeve supporting member 14b is cut, and the outer edge is cut off. Only the connecting member 14c is separated from the cathode main body member 12, and one end side of the three cathode sleeve supporting members 14b is released.
Then, one end of the released cathode sleeve supporting member 14b of the cathode sleeve structure 14 is bent, and the bent portion and the upper end of the cathode holding member 13 are welded as shown in FIG.
[0064]
Thereby, the cathode sleeve supporting member 14b of the cathode sleeve structure 14 and the cathode holding member 13 are welded.
According to such a welding method, although the number of steps for cutting the outer edge connecting member 14c is increased, a conventional welding device can be used, and further, until just before the welding of the cathode main body member 12 and the cathode holding member 13 is fixed. Since the cathode sleeve support member 14b of the cathode sleeve structure 14 is not released, deformation of the cathode sleeve support member 14b immediately before welding can be prevented.
[0065]
In addition, by making the cut portion shown in FIG. 11 the cut portion shown in FIG. 13, that is, by cutting so as to leave the outer edge connecting member 14c on the extension of the cathode sleeve supporting member 14b, The step of bending the cathode sleeve support member 14b described above is omitted, and the chance of the cathode sleeve support member 14b being deformed can be further reduced.
[0066]
In the first embodiment, a plurality of cathode sleeve precursors 14d are transported in a state of being included in the cathode sleeve substrate 22 until the separation step, which is the fifth step, of the eight steps described above. However, the present invention is not limited to this. For example, the storage and transport may be performed in a state where the cathode sleeve precursor 14d is separated from the cathode sleeve substrate 22 from the first step.
[0067]
In that case, the separated cathode sleeve precursor 14d is fixed to the three supporting member precursors 14f by the outer edge connecting member precursor 14g, so that when an external force is applied, the external force is applied to each supporting member. It can be dispersed in the precursor 14f, and the deformation of the support member precursor 14f can be suppressed.
In the first embodiment, it is assumed that the cathode sleeve structure 14 is made of a 99.9% pure Ni material, and specific dimensions of the cathode sleeve structure 14 and each of the cathode sleeve support members 14b are given. In the blackening heat treatment step, a specific blackening method has been described, but not limited thereto, and at least the heater housing member 14a, the cathode sleeve supporting member 14b, and the outer edge connecting member 14c are integrally formed of the same material. While maintaining the configuration, the material, the heat treatment method for blackening, and the dimensions may be changed as long as the heat loss and the production quality are not deteriorated as compared with the related art.
[0068]
The present inventors incorporated the following six types of cathode structures in order to search for alternative materials, heat treatment methods for blackening, and dimensions as long as heat loss and manufacturing quality did not worsen than before. An operation test was performed using an electron gun.
The measurement target of each test is a cathode sleeve of two cathode assemblies on both sides among three cathode assemblies existing in a plurality of in-line type electron guns.
(Specification of test product)
1. Specifications as conventional cathode structure 100
As the conventional cathode assembly 100, the material of the cylindrical cathode sleeve 102 is 20% Cr (chromium) and 80% Ni (nickel), and the outer diameter of the cylindrical portion is 1.6 mm and the height is 2.5 mm. The thickness of the cathode sleeve support member 106 was 2.5 mm, the width was 0.3 mm, and the thickness was 0.1 mm.
[0069]
The cathode sleeve support member 106 is made of a Ni—Fe material, and is welded to the cathode sleeve 102 and the cathode holding member 105.
The cathode sleeve 102 is heat-treated in wet hydrogen, and black chromium oxide is formed on the inner and outer surfaces.
The cap-like member 103 is made of a Ni material having a purity of 99.9%. The outer surface of the cap-like member 103 is made of BaCO having a thickness of about ₃ A layer is formed.
[0070]
The heater 101 is a heater for 0.65 W.
2. Specifications of the cathode structure of Comparative Example (1)
Further, as the cathode structure of Comparative Example 1, a structure in which the blackening heat treatment step was omitted from the cathode structure 10 in the first embodiment was used.
The cathode sleeve structure of the comparative example (1) is similar to the cathode structure 10 in the first embodiment in that the material is made of a Ni material having a purity of 99.9%, but a cylindrical heater housing member 14a is used. Is different from the cathode structure 10 in the first embodiment in that the diameter of the cathode structure is 1.5 mm, the height is 2.5 mm, and the plate thickness is 0.1 mm.
[0071]
In addition, in the comparative example (1), the width of the support portion is 0.3 mm, which is the same as the cathode structure 10 in the first embodiment, but the length of the support portion is 2.0 mm and the width is 0.3 mm. The difference from the cathode assembly 10 in the first embodiment is that the thickness is 3 mm and the plate thickness is 0.1 mm.
The material of the cap-like member 15 is a Ni material having a purity of 99.9%, and a layer of about 0.065 mm containing BaO (barium oxide) as a main component as an electron emitting material layer is formed on the outer surface thereof. Is formed.
[0072]
The heater is a heater for 0.65 W.
3. Specifications of the cathode structure of Comparative Example (2)
As shown in FIG. 10, the cathode assembly of Comparative Example (2) is different from the cathode assembly only in that the cap-shaped member 15 and the heater housing member precursor 14e are integrally formed by pressing one sheet material. It is different from the cathode structure of Example (1).
4. Specifications of Comparative Example (3) as cathode structure
The cathode assembly of Comparative Example (3) is the same as the cathode assembly of Comparative Example 1, except that a high melting point metal and an inorganic binder composed of tungsten powder having an average particle diameter of 1 μm and sintered alumina having an average particle diameter of 5 to 10 μm are combined. The inner surface of the cathode sleeve structure is blackened, and other materials and dimensions are the same as those of the cathode structure of Comparative Example (1).
5. Specifications of Comparative Example (4) as cathode structure
The cathode structure of Comparative Example (4) is the same as the cathode structure of Comparative Example (1) except that 0.1% of Mg (magnesium) is added to Ni, which is the material of the cathode sleeve structure 14, and other materials are used. The dimensions and the like are the same as those of the cathode assembly of Comparative Example (1). 6. Specification of Comparative Example (5) as cathode structure
The cathode assembly of Comparative Example (5) is the same as the cathode assembly of Comparative Example (1), except that the material of the cathode sleeve structure 14 is 80% Ni-20% Cr, and the cathode sleeve structure 14 is subjected to hydrogen treatment. An oxidation treatment is performed at about 700 ° C., and then a heat treatment is performed at about 1000 ° C. in wet hydrogen, so that Cr ₂ O ₃ To form a black cathode sleeve structure.
[0073]
The other materials and dimensions are the same as those of the cathode structure of Comparative Example (1).
Hereinafter, results of tests performed using these six types of cathode structures will be described.
For convenience, in FIGS. 14 to 17, the conventional cathode structure is described as “(conventional)”, and the cathode structures of Comparative Examples (1) to (5) are described as “(1)” to “(5)”. Notation respectively.
(Test results)
FIG. 14 is a diagram illustrating an initial (immediately after operation) temperature of the cathode assembly.
[0074]
The inventors measured the temperatures of the plurality of cathode assemblies in the initial state of each test sample, and obtained the variation, that is, the standard deviation.
The reason for obtaining the temperature variation of the cathode assembly in this manner is as follows.
That is, a cathode ray tube device for displaying a color image is provided with three cathode structures. If the operating temperatures of the respective cathode structures greatly vary, a difference occurs in the rate of deterioration of the electron emission characteristics of the electron emitting material layer, and the inside of the cathode ray tube is reduced. The three electron beam currents fluctuate, the white balance is lost, and the color tone is poor.
[0075]
Here, the electron beam current is a percentage of the current value after lapse of 2000 hours with respect to the initial current value corresponding to each cathode assembly.
It is known that the temperature of the cathode assembly varies due to a difference in the amount of heat conduction from the heater 11 to the electron emitting material layer 16.
That is, it is a product and manufacturing problem to suppress the difference in the amount of heat conduction described above.
[0076]
The standard deviation of the temperature of the conventional cathode assembly in the initial state is 6.2, as shown in FIG. 14, and the standard deviation of the temperature of the cathode assembly in Comparative Examples (1) to (5) in the initial state is They were 2.6, 2.0, 0.96, 2.3 and 1.2, respectively.
From these results, it can be seen that the cathode assemblies of Comparative Examples (1) to (5) have smaller temperature variations immediately after operation than the conventional products.
[0077]
In particular, it can be seen that in the cathode assemblies of Comparative Examples (3) to (5), the temperature variation immediately after the operation is small.
FIG. 15 is a diagram showing the temperature of the cathode assembly after 2000 hours have elapsed from the start of the operation.
The standard deviation of the temperature of the conventional cathode assembly after lapse of 2,000 hours is 6.9, as shown in FIG. 15, and the cathode assemblies of Comparative Examples (1) to (5) also after 2,000 hours have passed. The standard deviations of the temperatures were 3.0, 2.4, 1.3, 2.9 and 1.8, respectively.
[0078]
From these results, it can be seen that the temperature variations of the cathode assemblies of Comparative Examples (1) to (5) are smaller than those of the conventional one.
Also, as in the initial state, it can be seen that the temperature variations are smaller in the cathode assemblies of Comparative Examples (3) to (5) than in the other comparative examples.
FIG. 16 is a diagram showing the aforementioned electron beam current of the cathode structure.
[0079]
The standard deviation of the electron beam current of the conventional cathode assembly after lapse of 2,000 hours is 6.4 as shown in FIG. 16, and similarly, the standard deviation of the cathode assemblies of Comparative Examples (1) to (5) after lapse of 2,000 hours. The standard deviations of the electron beam current were 3.1, 2.7, 1.8, 0.9, and 1.6, respectively.
From these results, it can be seen that the cathode structures of Comparative Examples (1) to (5) have a smaller variation in electron beam current than the conventional products.
[0080]
In particular, it can be seen that the variation in the electron beam current is significantly smaller in the cathode assembly of Comparative Example (4) than in the other Comparative Examples.
FIG. 17 is a diagram showing an image output time which is a time from when the power is turned on to when 80% of the cathode current flows when a stable image is displayed on the cathode ray tube.
The standard deviation of the image output time of the conventional cathode assembly is 0.87 as shown in FIG. 17, and the standard deviation of the image output time of the cathode assemblies of Comparative Examples (1) to (5) is 0, respectively. .45, 0.3, 0.21, 0.40, and 0.28.
[0081]
From these results, it can be seen that the cathode structures of the present invention of Comparative Examples (1) to (5) have less variation in image output time than the conventional one.
Further, in the cathode assemblies of Comparative Examples (2), (3) and (5), the variation is smaller in the region where the image output time itself is shorter than in the other comparative examples and the conventional one. I understand that.
[0082]
As described above, in Comparative Examples (1) to (5), variations in the temperature of the cathode structure and the electron beam current are smaller than those of the conventional products, and therefore, it is considered that there is no problem when adopted as a product.
One of the reasons why the variations in the temperature of the cathode structure and the electron beam current in the comparative examples (1) to (5) are smaller than that of the conventional product is that the cylindrical heater housing member 14a and the cathode sleeve support member 14b are different. It is considered that, because they are integrally formed, not joined by welding, a product having a stable product shape is completed, and variation in heat loss of each cathode assembly is suppressed.
[0083]
In the cathode structures of Comparative Examples (1) to (4) described above, a material containing Ni as a main component was used for the cathode sleeve structure, but Fe (iron), Co (cobalt), and Cr were used as main components. Alternatively, a material obtained by adding Fe or Co to Ni as a main component may be used. The selection of these materials can be appropriately optimized in consideration of the thermal conductivity, the coefficient of thermal expansion, the rigidity, and the cost of the cathode sleeve structure 14.
[0084]
In order to improve the high temperature resistance, the cathode sleeve structure 14 is formed by using any one of Ta (tantalum), Mo (molybdenum) and Nb (niobium) having a high melting point of 2000 ° C. or more as a main material. Is preferred.
In the cathode assembly of Comparative Example (4), Mg was used as an additive, but Cr, Si (silicon), W (tungsten), or Al (aluminum) may be used instead of Mg.
[0085]
Note that a mixture of several kinds of these metals may be used as the additive.
In addition, the cathode sleeve structure 14 formed of any one of Fe, Co, Ta, Mo, Nb, and Cr as a main component includes one or more metals of Mg, Si, Cr, W, or Al. It may be one containing an additive.
However, when the main component is Cr, naturally Cr is not used as an additive.
[0086]
In addition, the cathode structure of the first embodiment has been described as an oxide cathode mounted on a general-purpose cathode ray tube, but may be an impregnated cathode mounted on a high-brightness, high-definition cathode ray tube. Absent.
In this case, instead of forming the electron emitting material layer 16 on the cap-like member 15 by spraying to form a cathode structure, a porous tungsten pellet is covered with a cap, and the tungsten pellet is welded to the cathode sleeve structure 14. By doing so, the cathode structure may be configured.
[0087]
Alternatively, the cathode assembly may be formed by welding the tungsten pellet to the upper surface of a covered cylindrical member 14j as shown in FIG.
(Second embodiment)
Hereinafter, the cathode structure 30 according to the second embodiment will be described.
(Constitution)
Like the cathode structure 10 in the first embodiment, the cathode structure 30 includes a cathode for generating electrons in a cathode ray tube device such as a cathode ray tube, and a supporting material thereof.
[0088]
The cathode assembly 30 has the same structure as the cathode assembly 10 except that the shapes of the heater housing member 14a and the heater housing member precursor 14e of the cathode assembly 10 are partially changed.
Hereinafter, differences between the cathode assembly 30 and the cathode assembly 10 will be described.
For convenience, the cathode main body member 12, the intermediate product 12a, the cathode holding member 13, the cathode sleeve structure 14, the heater housing member 14a, the cathode sleeve support member 14b, the outer edge connecting member 14c, and the cathode sleeve precursor 14d in the cathode assembly 10 The member names in the cathode structure 30 corresponding to the heater housing member precursor 14e, the support member precursor 14f, and the outer edge connecting member precursor 14g are respectively referred to as a cathode body member 32, an intermediate product 32a, a cathode holding member 33, and a cathode sleeve structure. The body 34, the heater housing member 34a, the cathode sleeve support member 34b, the outer edge connecting member 34c, the cathode sleeve precursor 34d, the heater housing member precursor 34e, the support portion precursor 34f, and the outer edge connecting member precursor 34g.
[0089]
The cathode assembly 30 differs from the cathode assembly 10 in that, as shown in FIG. 18, a cylindrical heater accommodating member 14a has a thicker flange portion 34k.
(Production method)
Next, a method for manufacturing the cathode assembly 30 will be described.
This flange portion 34k is formed in the cathode sleeve substrate forming step, which is the first step described in the first embodiment, and the other steps are the same as those in the first embodiment.
[0090]
However, the shape of the bending jig in the bending step is different.
Hereinafter, the cathode sleeve substrate forming step and the bending step in which the second embodiment is different from the first embodiment will be described.
(Cathode sleeve substrate molding process)
The heater housing member precursor 14e of the cathode assembly 10 according to the first embodiment has a constant thickness t0 of 0.05 mm except for a boundary portion with the support member precursor 14f, as shown in FIG. As described above, in the heater housing member precursor 34e of the cathode assembly 30 according to the second embodiment, the thickness t2 near the boundary with the support portion precursor 34f is 0.08 mm, and the thickness t0 (0) 0.05 mm), and has a flange portion 34k with a height h of 0.1 mm, which is about 0.03 mm thicker.
(Bending process)
As shown in FIG. 20B, the cross section of the intermediate product 32a shown in FIG. 20A has a larger thickness at the flange portion 34k.
[0091]
As shown in FIG. 20B, the intermediate product 32a is set in a concave portion of the bending jig 38a where negative pressure is applied.
Note that the cross section of the intermediate product 32a shown in FIGS. 20B to 20D is a CC cross section of the intermediate product 32a shown in FIG.
Then, as shown in FIG. 20C, the bending jig 38b descends to a position where the bending jig 38b contacts the bending jig 38c while maintaining the relative positions of the bending jig 38a and the bending jig 38b. .
[0092]
Further, as shown in FIG. 20D, the bending jig 38a descends.
At this time, the tip 38d of the bending jig 38a and the upper surface of the flange 34k come into contact with each other, the intermediate product 32a is pushed down, and the projection 38e of the bending jig 38c is moved to the heater housing member 34a of the intermediate product 32a. When the support body precursor 34f is bent and plastically deformed, it becomes the cathode main body member 32.
[0093]
In the bending step in the first embodiment described above, since the support member precursor 14f having a thickness of 0.05 mm is directly sandwiched and bent between the bending jigs 28a and 28b, the bending jig is used. In some cases, the buckling portion B (see FIG. 7 (c)) of the support member precursor 14f is subjected to a shearing force to cause a crack due to the variation in the stroke amount of the support member.
[0094]
In the bending step according to the second embodiment, due to the presence of the flange portion 34k, the distal end portion 38d of the bending jig 38a is applied not to the thin-walled support portion precursor 34f but to the thick-walled flange portion 34k. Since the precursor 34f is bent, the buckling portion D is less likely to crack.
That is, the shape having the flange portion 34k and the bending method further improve the yield of the cathode assembly 30.
(Restriction on the height of the flange portion 34k)
As described above, although the flange portion 34k improves the yield of the cathode structure 30, the provision of the flange portion 34k allows the heat conduction from the cathode sleeve structure 34 to the cathode holding member 33, that is, the heat loss. May lead to an increase in volume.
[0095]
More specifically, when the height h of the flange portion 34k is increased, the amount of heat conduction from the cathode sleeve structure 34 to the cathode holding member 33, that is, the amount of heat loss increases, so the height h is increased unnecessarily. I can't.
The inventors have conducted intensive studies and found that when the thickness of the heater accommodating member 34a is 0.05 mm and the thickness and width of the cathode sleeve supporting member 34b are 0.05 mm and 0.25 mm, respectively, the height of the flange portion 34k is It has been found that there is a characteristic shown in FIG. 21 between the value obtained by dividing h by the plate thickness t1 of the cathode sleeve support member 34b (hereinafter, referred to as “shape ratio value (C)”) and the amount of heat loss.
[0096]
According to this, in the range where the shape ratio value (C) changes from 2 to 4, the amount of heat loss changes significantly, and the amount of heat loss increases by about 4%.
The inventors set the upper limit of the shape ratio value (C) to 3.5 in consideration of the state of deterioration of heat loss.
In addition, when the height h of the flange portion 34k is smaller than the thickness t1 of the cathode sleeve support member 34b, that is, when the shape ratio value (C) is less than 1, the bending jig in the bending step described above. The lower end of the shape ratio value (C) was set to 1 because the tip 38d of 38a comes into contact with the cathode sleeve support member 34b quickly and a shear force is easily generated in the cathode sleeve support member 34b.
[0097]
Further, the inventors have noticed that when the shape ratio value (C) is gradually increased, the heat loss starts to greatly change at the point where the shape ratio value (C) is 2, and the heat loss is suppressed. Meanwhile, it has been found that it is preferable to set the shape ratio value (C) to 2 in order to improve the yield in the bending step.
Thus, the height h of the flange portion 34k is set to a value at which the above-mentioned shape ratio value (C) becomes 2, that is, 0.1 mm.
[0098]
With the above-described configuration and manufacturing method, when the cathode sleeve supporting member 34b is bent in the bending step of the cathode assembly 30, this shearing force is prevented from directly acting on the cathode sleeve supporting member 34b. Cracking of the cathode sleeve support member 34b can be prevented, and the yield of the cathode assembly can be improved.
[0099]
In the second embodiment, the thickness t2 of the flange portion 34k is set to 0.08 mm. However, the thickness t2 is not limited to this, and the tip 38d of the bending jig 38a contacts the upper surface of the flange portion 34k to stop. And may be changed as long as the heat loss does not exceed the allowable amount.
[0100]
【The invention's effect】
As described above, the cathode sleeve structure of the present invention is a cathode sleeve structure that houses a heater, and has a tubular shape, a storage member having one end open, and a long shape. A plurality of support members extending radially from the opening periphery of the storage member and integrally formed with the storage member; and a connection member connecting the support members to each other and integrally formed with the support member. It is characterized by the following.
[0101]
Originally, in the cathode sleeve structure, the supporting member is formed thin in order to suppress heat loss, but in the case of the conventional cathode sleeve structure, the base of the supporting member is connected until it is joined to the holding member. While the tip is in a state where it can be freely deformed, the support member is connected to the adjacent support member at the end of the base, so that the cathode sleeve structure is integrated into another strong structure. In addition, since the movement of the support member is suppressed by the connecting member, and the external force applied to the support member is dispersed to other support members, the deformation of the support member is suppressed.
[0102]
Therefore, also in the step of manufacturing a cathode assembly using this cathode sleeve structure, the number of cathode sleeve structures that cannot be used due to deformation of the support member is reduced, so that the yield in manufacturing the cathode assembly is improved. .
Further, the connection position of each of the support members may be an outer end of each of the support members.
[0103]
Thereby, since there is no open end in the support member, the deformation of the support member is further suppressed.
In addition, each of the connecting members may be positioned substantially on the same circle.
Thereby, the external force applied to the support member is more easily dispersed to other support members.
[0104]
The storage member has a first end where the opening is located and another second end, and each of the support members is located on the second end side near a boundary with the storage member. May also be bent at a uniform angle.
Thereby, variation in the shape of each support member is suppressed.
That is, the conditions for applying the external force to each support member are made uniform.
[0105]
Further, the angle of the bending may be less than 90 degrees with respect to the central axis of the storage member.
As a result, the length of the cathode sleeve structure in the longitudinal direction is shortened, the apparent surface area to which an external force is applied is reduced, and the external force is harder to be applied.
Further, the number of the support members may be n, and an opening angle between the adjacent support members may be approximately 360 / n degrees.
[0106]
Thereby, the conditions for applying the external force to each support member are made uniform.
Further, the storage member, the support member, and the connection member may be mainly composed of any one of Ni, Fe, Co, Ta, Mo, and Nb.
This increases the choice of materials and the degree of freedom in designing the cathode sleeve structure.
[0107]
Further, the storage member, the support member, and the connection member may include one or more metals of Mg, Si, Cr, W, and Al.
This allows these contained metals to act as a reducing agent for the electron-emitting substance.
Further, the storage member, the support member, and the connection member may be mainly composed of Cr.
[0108]
Accordingly, a blackening film can be formed on the housing member, that is, the cathode sleeve, by simply heating without spraying the metal particles.
Further, the storage member, the support member, and the connection member may include one or more metals of Mg, Si, W, and Al.
This allows these contained metals to act as a reducing agent for the electron-emitting substance.
[0109]
Further, the storage member has a first end where the opening is located and another second end, and the second end is closed by a member integrally formed with the storage member. You can also.
Thus, the closing of the second end is performed with the molding of the storage member.
That is, there is no need to provide a step of fitting and welding a separate member separately from the step of forming the storage member, so that the opportunity for applying an external force to the support member is reduced.
[0110]
Further, the cathode sleeve structure of the present invention is a cathode sleeve structure accommodating a heater, and has a tubular shape, a storage member having one end opened, and radially extending from the opening periphery of the storage member. A plurality of support members integrally formed with the storage member, and the support member is extended from each of the support members, and a portion of the one extended from an adjacent support member is close to each other. And a plurality of extension members integrally formed.
[0111]
When an external force is applied in a direction in which adjacent extension members approach each other, the extension member extended from the support member and another extension member come into contact with each other, so that the movement of the support member is suppressed by the extension member, Since the external force applied to the support member is dispersed to other support members, deformation of the support member is suppressed.
That is, even in the process of manufacturing the cathode assembly using the cathode sleeve structure, the number of the cathode sleeve structures that cannot be used due to the deformation of the support member is reduced, so that the yield in manufacturing the cathode assembly is improved.
[0112]
The position where the extension member extends from each support member is an outer end of each support member.
If an extension member extending from the support member comes into contact with another extension member within the elastic deformation area when an external force is applied to the support member, the movement of the end of the support member is thereby suppressed.
[0113]
In addition, each of the extension members may be positioned substantially on the same circle.
Thereby, when an external force is applied to the support member, the extension members are easily brought into contact with each other, and the external force applied to the support member is more easily dispersed to other support members.
In addition, the proximity may occur between the ends of the respective extension members.
[0114]
Thus, when an external force is applied to the support member, the ends of the extension members come into contact with each other.
Further, the gap at the location where the proximity occurs may be 0.5 mm or less.
Thus, when an external force is applied to the support member, the extension member extended from the support member and another extension member come into contact with each other in the elastic deformation region, and the movement of the support member is suppressed by the extension member. Since the external force applied to the support member is dispersed to other support members, deformation of the support member is suppressed.
[0115]
Further, the cathode sleeve structure of the present invention is a cathode sleeve structure accommodating a heater, has a cylindrical shape, has a first end and a second end, and has an opening at the first end. A storage member having a step formed by the thickness of the peripheral portion of the opening being thicker than the other portions, forming a long shape, and extending radially from the peripheral edge of the step, A plurality of support members formed integrally with the storage member and bent toward the second end near the boundary with the step portion may be provided.
[0116]
Thus, since the supporting member is bent near the step portion where the thickness is thicker than other portions, the occurrence of cracks due to the bending is suppressed.
Further, the support member may be a plate having a thickness of tmm, and the length L of the step in the longitudinal direction of the cylinder may be not less than tmm and not more than 3.5 tmm.
[0117]
Thus, the occurrence of cracks due to the bending is suppressed without greatly increasing the heat loss.
Further, the cathode structure of the present invention, the cathode sleeve structure provided with the connecting member, surrounds the cathode sleeve structure, the end portion of the support member so that the cathode sleeve structure is fixed substantially at the center or A holding member joined to the connecting member may be provided.
[0118]
In this cathode sleeve structure, the storage portion is held by the holding member by joining the distal end of the supporting member extending radially or the connecting member to the holding member.
In other words, the support member is originally formed to be thin in order to suppress heat loss in the function of the cathode sleeve structure. However, in the case of the conventional cathode sleeve structure, the support member is not connected until it is joined to the holding member. While the tip is in a state where the tip can be freely deformed, the support member is connected to the adjacent support member at the tip of the root, so that the cathode sleeve structure is joined to the holding member until the cathode sleeve structure is joined to the holding member. The movement of the support member is suppressed by the connecting member, and the external force applied to the support member is dispersed to other support members, so that the deformation of the support member is suppressed.
[0119]
Therefore, also in the manufacturing process of the cathode structure, the number of the cathode sleeve structures that cannot be used due to the deformation of the support member is reduced, and the yield in manufacturing the cathode structure is improved.
Further, the cathode structure of the present invention is a cathode sleeve structure provided with the extension member, and surrounds the cathode sleeve structure, the end of the support member so that the cathode sleeve structure is fixed substantially at the center thereof or A holding member joined to the extension member.
[0120]
Thereby, the movement of the support member is suppressed by the extension member until the cathode sleeve structure is joined to the holding member, and the external force applied to the support member is dispersed to other support members. Deformation is suppressed.
That is, also in the manufacturing process of the cathode structure, the number of the cathode sleeve structures that cannot be used due to the deformation of the support member is reduced, so that the yield during the manufacturing of the cathode structure is improved.
[0121]
Further, the cathode structure of the present invention, the cathode sleeve structure having the step portion, and surrounds the cathode sleeve structure, at the end of the support member so that the cathode sleeve structure is fixed substantially at the center. And a holding member joined thereto.
Since the thickness of the bent portion of the support member is thicker than the other portions, the cathode sleeve structure that is less likely to crack is used as a constituent member of the cathode structure.
Further, a cathode ray tube device according to the present invention includes an electron gun having the above-described cathode structure.
[0122]
Thereby, the yield of the cathode structure used in the cathode ray tube device is improved.
That is, the yield as a cathode ray tube device is also improved.
Further, the cathode sleeve substrate of the present invention is a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure, a plurality of storage members projecting in a cylindrical shape from the surface of the metal thin plate, and a long shape. And a plurality of support members extending radially from the periphery of the base of the storage member on the thin metal plate.
[0123]
Thereby, since a plurality of storage members and support members are formed on the thin metal plate, by supporting a part of the thin metal plate, the storage member and the support member are not directly supported, and the storage member and the support member are not directly supported. The members are stored and transported.
That is, it is difficult for external force to be directly applied to the storage member and the support member.
Further, since the positions of the storage member and the support member on the thin metal plate are determined, when processing is performed on these using an automatic machine in such a form, the positioning of the members is facilitated.
[0124]
In addition, the cathode sleeve substrate may further include a plurality of connecting members that connect the supporting members protruding from the root portion of the same storage member.
Thereby, even if the set of the storage member, the support member, and the connection member is separated from the thin metal plate, the deformation of the support member is suppressed by the presence of the connection member.
[0125]
In addition, the cathode sleeve substrate further extends from each of the support members, and extends from a base portion of the same storage member and extends from an adjacent support member, and a plurality of extensions extending from adjacent support members are close to each other. It may have a member.
Thereby, even if the set of the storage member, the support member, and the extension member is separated from the thin metal plate, the deformation of the support member is suppressed by the presence of the extension member.
[0126]
Further, the method for manufacturing a cathode sleeve substrate of the present invention is a method for manufacturing a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure, by partially deforming a metal sheet and projecting it. A storage member forming step of forming a cylindrical storage member on the metal sheet; and removing a part of the metal sheet to elongate radially extending from a periphery of a root portion of the storage member. A supporting member forming step of forming a plurality of supporting members, and a connecting member for connecting the supporting members originating from a root portion of the same storing member by removing a part of the metal sheet. And forming a connecting member for each member.
[0127]
Thereby, the storage member, the support member, and the connecting member are formed by partially deforming the metal sheet and removing a part thereof.
That is, there is no step of joining the storage member, the support member, and the connection member, and these are integrally formed, so that the cathode sleeve substrate can be easily formed.
In the housing member forming step, a plurality of the housing members are formed on the thin metal plate, and in the supporting member forming step, the plurality of supporting members are formed for each of the housing members, and the connecting member forming step Then, the connection member may be formed for each of the storage members.
[0128]
Thereby, even if there are a plurality of sets of the storage member, the plurality of support members, and the connecting members, these sets are stored and transported in a unit of one thin metal plate.
Further, the method for manufacturing a cathode sleeve substrate may further include a bobbin winding step of winding the thin metal plate on which the plurality of storage members, the support members, and the connection members are formed around a bobbin.
[0129]
This makes it difficult for external force to be applied to the storage member, the support member, and the connection member, so that the cathode sleeve substrate can be stored and transported while maintaining the quality at the time of manufacture.
Further, the method for manufacturing a cathode sleeve substrate of the present invention is a method for manufacturing a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure, by partially deforming a metal thin plate and projecting it. A storage member forming step of forming a cylindrical storage member on the metal thin plate, and a long shape extending radially from the periphery of a root portion of the storage member by removing a part of the metal thin plate. A supporting member forming step of forming a plurality of supporting members, and an extension extending from each of the supporting members by removing a part of the metal sheet, and a portion extending from an adjacent supporting member is close to each other. And an extension member forming step of forming the member.
[0130]
Thereby, the storage member, the support member, and the extension member are formed by partially deforming the metal sheet and removing a part thereof.
That is, since there is no step of joining the storage member, the support member, and the extension member, and these are integrally formed, the cathode sleeve substrate can be easily formed.
In the housing member forming step, a plurality of the housing members are formed on the thin metal plate, and in the support member forming step, the plurality of support members are formed for each of the housing members, and the extension member forming step Then, the extension member may be formed for each of the storage members.
[0131]
Thereby, even if there are a plurality of sets of the storage member, the plurality of support members, and the extension members, these sets are stored and transported in units of one thin metal plate.
The method for manufacturing a cathode sleeve substrate may further include a bobbin winding step of winding the thin metal plate on which the plurality of storage members, the support members, and the extension members are formed around a bobbin.
[0132]
This makes it difficult for external force to be applied to the storage member, the support member, and the extension member, so that the cathode sleeve substrate can be stored and transported while maintaining the quality during manufacture.
Further, the method for manufacturing a cathode sleeve substrate of the present invention is a method for manufacturing a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure, by partially deforming a metal sheet and projecting it. A storage member forming step of forming a cylindrical storage member on the thin metal plate, and by partially deforming the thin metal plate or the storage member, the thickness of the base peripheral edge of the storage member is made thicker than other portions. Forming a step, and forming a plurality of elongate support members extending radially from the periphery of the step by removing a part of the thin metal plate. May be included.
[0133]
Thereby, the storage member, the support member, and the connecting member are formed by partially deforming the thin metal plate and removing a part thereof.
That is, there is no step of joining the storage member, the support member, and the connection member, and these are integrally formed, so that the cathode sleeve substrate can be easily formed.
In the storing member forming step, a plurality of the storing members are formed on the thin metal plate, and in the supporting member forming step, the plurality of supporting members are formed for each of the storing members.
[0134]
Thus, even if there are a plurality of sets of the storage member and the plurality of support members, these sets are stored and transported in a single sheet metal unit.
Further, the method for manufacturing a cathode assembly of the present invention is a method for manufacturing a cathode assembly using a cathode sleeve substrate having the connecting member, wherein a part of the thin metal plate is cut to remove the thin metal plate from the thin metal plate. A separation step of separating the set of the storage member, the support member, and the connection member, and a welding step of welding the cylindrical holding member and an end of the support member or the connection member after the separation. It is characterized by having.
[0135]
Thereby, by welding the end portion of the support member or the connecting member to the holding member, it becomes difficult for external force to be directly applied to the support member, so that deformation of the support member is prevented. Further, the separation step may be performed in a latter half of the steps required from the cathode sleeve substrate to the welding step in a time series manner.
[0136]
Accordingly, most of the steps from the cathode sleeve substrate to the welding step are in a state in which the cathode sleeve substrate includes the storage member, the support member, and the connecting member or the extension member. And, on the cathode sleeve substrate other than the connection member or the extension member, a place for supporting or restraining can be secured, and the external force is hardly applied directly to the storage member, the support member and the connection member or the extension member, so that the yield is further improved. Be improved.
[0137]
Further, since the positions of the storage member and the support member on the thin metal plate are determined until the separation is performed, the positioning of these members is facilitated.
In addition, the method for manufacturing a cathode assembly may further include, before the separating step, a slit forming step of forming at least one slit by cutting or notching a part of the connecting member. .
[0138]
Thereby, the degree of freedom in press forming of the connecting member and the supporting member is improved due to the presence of the slit.
Further, the method for manufacturing a cathode assembly of the present invention is a method for manufacturing a cathode assembly using a cathode sleeve substrate having the extension member, wherein a part of the metal sheet is cut to remove the metal sheet from the metal sheet. The storage member, a separation step of separating the set of the support member and the extension member, and, after the separation, may include at least a welding step of welding the cylindrical holding member, the support member or the extension member. Good.
[0139]
Accordingly, by welding the end portion or the extension member of the support member to the holding member, it becomes difficult for external force to be directly applied to the support member, so that the deformation of the support member is prevented. Further, the method for manufacturing a cathode assembly of the present invention is a method for manufacturing a cathode assembly, wherein the cathode assembly is manufactured using a cathode sleeve substrate. A separating step of separating a set of a member and the support member, and a direction in which an end portion of the support member is fixed and an end surface of the step in the storage member is used as a point of force and headed from a protruding tip of the storage member to a root. And a welding step of welding the cylindrical holding member and the support member or the extension member after the separation.
[0140]
In the bending step, since the bending is performed with the end face of the step having a large thickness as a power point, the occurrence of cracks in the bent portion of the support member is reduced.
[Brief description of the drawings]
FIG. 1 is a diagram showing a mounting position of a cathode assembly in a cathode ray tube device according to a first embodiment.
FIG. 2 is a diagram illustrating a configuration of a cathode assembly according to the first embodiment.
FIG. 3A is a schematic view of a cathode sleeve substrate forming step.
(B) is a schematic diagram of a blackening heat treatment step.
(C) is a schematic diagram of a first welding processing step.
(D) is a schematic diagram of an electron emitting material layer forming step.
(E) is a schematic diagram of a separation step.
(F) is a schematic diagram of a bending step.
(G) is a schematic diagram of a second welding process step.
(H) is a schematic diagram of a heater welding process.
FIG. 4A is a diagram of the cathode sleeve substrate 22 viewed from above.
(B) is a diagram of the cathode sleeve substrate 22 viewed from the side.
(C) is a diagram showing a storage and transport mode of the cathode sleeve substrate 22.
FIG. 5 is a view showing a blackening heat treatment step.
FIG. 6 is a diagram showing a first welding processing step.
FIG. 7A is a schematic view of an intermediate product immediately before the bending step in the first embodiment.
(B) is a figure showing a situation where an intermediate product is set in a bending jig in the bending step in the first embodiment.
(C) is a figure explaining movement of a bending jig in a bending process in a 1st embodiment.
(D) is a figure explaining movement of a bending jig and shape change of an intermediate product in a bending process in a 1st embodiment.
(E) is a diagram showing the shape of the intermediate product after the bending step in the first embodiment.
FIG. 8
It is a figure which shows the modification regarding arrangement | positioning of the outer edge connection member 14c.
FIG. 9
It is a figure which shows the modification regarding the shape of the outer edge connection member 14c.
FIG. 10
It is a figure showing the modification about the shape of cathode sleeve substrate 22.
FIG. 11
It is a figure which shows the modification of implementation content in the separation process of a cathode structure.
FIG.
It is a figure which shows the modification of implementation content in the welding process of a cathode structure.
FIG. 13
It is a figure which shows the modification of implementation content in the separation process of a cathode structure.
FIG. 14
FIG. 4 is a diagram showing the temperature of the cathode assembly at an initial stage (immediately after the operation).
FIG.
FIG. 9 is a diagram showing the temperature of the cathode assembly after 2000 hours have elapsed from the start of the operation.
FIG.
FIG. 4 is a diagram showing an electron beam current of a cathode assembly.
FIG.
It is a figure which shows an image output time.
FIG.
It is a figure showing composition of a cathode structure in a 2nd embodiment.
FIG.
(A) is a figure which looked at the cathode sleeve precursor of the cathode assembly in the second embodiment from above.
(B) is a diagram of the cathode sleeve precursor of the cathode assembly according to the second embodiment as viewed from the side.
FIG. 20 (a) is a schematic view of an intermediate product just before the bending step in the second embodiment.
(B) is a figure showing a situation where an intermediate product is set in a bending jig in the bending step in the second embodiment.
(C) is a figure explaining movement of a bending jig in a bending process in a 2nd embodiment.
(D) is a figure explaining movement of a bending jig and shape change of an intermediate product in a bending process in a 2nd embodiment.
FIG. 21 is a diagram illustrating a relationship between a value obtained by dividing a height of a flange portion by a plate thickness of a support portion and a heat loss amount.
FIG. 22 is a schematic view of a conventional cathode structure.
FIG. 23 is a diagram illustrating a conventional welding situation.
[Explanation of symbols]
1 cathode ray tube device
10 Cathode assembly
11 heater
11 JP
12 Cathode body member
12a Intermediate product
13 Cathode holding member
14 Cathode sleeve structure
14a Heater storage member
14b Cathode sleeve support member
14c Outer edge connecting member
14d cathode sleeve precursor
14e Heater storage member precursor
14f support member precursor
14g Outer edge connecting member precursor
14h slit
14i Outer edge extension member
14j Covered member
15 Cap-shaped member
16 Electron emitting material layer
20 belts
21 Parting Line
22 Cathode sleeve substrate
24 bobbins
25 Masking material
26 Injection nozzle
27 Electric furnace
28a Processing jig
28b Processing jig
28c Processing jig
28d protrusion
30 Cathode assembly
32 Cathode body member
32a Intermediate product
33 Cathode holding member
34 Cathode sleeve structure
34a heater storage member
34b Cathode sleeve support member
34b Direct cathode sleeve support member
34c Outer edge connecting member
34d cathode sleeve precursor
34e Heater storage member precursor
34f support precursor
34g Outer edge connecting member precursor
34k flange
38a Processing jig
38b Processing jig
38c Processing jig
38d tip
38e protrusion

Claims (43)

A cathode sleeve structure containing a heater,
A storage member that has a cylindrical shape and has one end opened,
A plurality of support members having a long shape, radially extending from the opening periphery of the storage member, and integrally formed with the storage member,
A cathode sleeve structure, comprising: a connecting member that connects the support members to each other and that is integrally formed with the support member. 2. The cathode sleeve structure according to claim 1, wherein the connection position in each of the support members is an outer end of each of the support members. 3. 3. The cathode sleeve structure according to claim 2, wherein each of the connecting members is located substantially on a circumference of the same circle. 4. The storage member has a first end where the opening is located and another second end,
4. The cathode sleeve structure according to claim 3, wherein each of the support members is bent at a uniform angle toward the second end near the boundary with the storage member. 5. The cathode sleeve structure according to claim 4, wherein the angle of the bending is less than 90 degrees with respect to a central axis of the storage member. There are n support members,
The cathode sleeve structure according to claim 5, wherein an opening angle between the adjacent support members is substantially 360 / n degrees. 2. The cathode sleeve according to claim 1, wherein the storage member, the support member, and the connection member are mainly made of any one of Ni, Fe, Co, Ta, Mo, and Nb. 3. Structure. The cathode sleeve structure according to claim 7, wherein the storage member, the support member, and the connection member contain one or more metals of Mg, Si, Cr, W, and Al. . The cathode sleeve structure according to claim 1, wherein the storage member, the support member, and the connection member are mainly composed of Cr. The cathode sleeve structure according to claim 9, wherein the storage member, the support member, and the connection member contain one or more metals of Mg, Si, W, and Al. The storage member has a first end where the opening is located and another second end,
The cathode sleeve structure according to claim 1, wherein the second end is closed by a member integrally formed with the storage member. A cathode sleeve structure according to claim 1,
A cathode structure surrounding the cathode sleeve structure, and a holding member joined to an end of the support member or the connecting member so that the cathode sleeve structure is fixed substantially at the center thereof; . A cathode ray tube device comprising an electron gun having the cathode structure according to claim 12. A cathode sleeve structure containing a heater,
A storage member that has a cylindrical shape and has one end opened,
A plurality of support members extending radially from the opening periphery of the storage member and integrally formed with the storage member;
A plurality of extension members integrally formed with the support member so that each of the support members is extended from each of the support members and a part of the one extended from an adjacent support member is close to each other. Cathode sleeve structure. The cathode sleeve structure according to claim 14, wherein a position where the extension member extends from each support member is an outer end of each support member. The cathode sleeve structure according to claim 15, wherein each of the extension members is located substantially on a circumference of the same circle. 17. The cathode sleeve structure according to claim 16, wherein the proximity occurs between ends of the extension members. The cathode sleeve structure according to claim 14, wherein the gap at the location where the proximity occurs is 0.5 mm or less. A cathode sleeve structure according to claim 14,
A cathode structure surrounding the cathode sleeve structure, and a holding member joined to an end of the support member or the extension member so that the cathode sleeve structure is fixed substantially at the center thereof. . A cathode ray tube device comprising an electron gun having the cathode structure according to claim 19. A cathode sleeve structure containing a heater,
It has a cylindrical shape, has a first end and a second end, has an opening at the first end, and the peripheral portion of the opening is thicker than other portions. A storage member having a step formed therein,
A plurality of supports having an elongated shape, extending radially from the periphery of the step, integrally formed with the storage member, and further bending near the second end near the boundary with the step. And a member. The support member is a plate having a thickness of tmm,
22. The cathode sleeve structure according to claim 21, wherein a length L of the step in the longitudinal direction of the cylinder is not less than tmm and not more than 3.5 tmm. A cathode sleeve structure according to claim 21;
A cathode structure surrounding the cathode sleeve structure, and a holding member joined to an end of the support member so as to fix the cathode sleeve structure substantially at the center thereof. A cathode ray tube device comprising an electron gun having the cathode structure according to claim 23. A cathode sleeve substrate as a base material when manufacturing the cathode sleeve structure,
A plurality of storage members projecting in a cylindrical shape from the surface of the metal sheet,
A cathode sleeve substrate, comprising: a plurality of support members having a long shape and extending radially from the periphery of a base portion of the storage member on the thin metal plate. The cathode sleeve substrate further comprises:
26. The cathode sleeve substrate according to claim 25, further comprising a plurality of connecting members for connecting the supporting members protruding from the base portion of the same storage member. The cathode sleeve substrate further comprises:
A plurality of extension members extending from each of the support members, starting from a root portion of the same storage member, and extending from adjacent support members, some of which are close to each other. 25 cathode sleeve substrates. A method for manufacturing a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure,
A storage member forming step of forming a cylindrical storage member on the metal sheet by partially deforming and projecting the metal sheet,
By removing a part of the thin metal plate, a supporting member forming step of forming a plurality of elongate supporting members extending radially starting from the periphery of the base portion of the storage member,
A connecting member forming step of forming a connecting member for connecting each of the supporting members originating from a root portion of the same storing member to each of the storing members by removing a part of the metal thin plate. A method for manufacturing a cathode sleeve substrate. In the storage member forming step, a plurality of storage members are formed on the metal thin plate,
In the supporting member forming step, the plurality of supporting members are formed for each of the storage members,
The method according to claim 28, wherein, in the connecting member forming step, the connecting member is formed for each of the storage members. The method for manufacturing the cathode sleeve substrate further includes:
30. The method according to claim 29, further comprising a bobbin winding step of winding the thin metal plate on which the plurality of storage members, the support members, and the connection members are formed around a bobbin. A method for manufacturing a cathode assembly using the cathode sleeve substrate according to claim 26,
A separating step of separating a set of the storage member, the support member, and the connecting member from the metal sheet by cutting a part of the metal sheet;
A method for manufacturing a cathode structure, comprising: at least a welding step of welding a cylindrical holding member and an end of the support member or the connection member after the separation. The cathode according to claim 31, wherein the separation step is performed in a latter half of the steps required from the cathode sleeve substrate to the welding step in a time series manner. The method of manufacturing the structure. The method for manufacturing the cathode assembly,
Further, prior to said separating step,
33. The method according to claim 32, further comprising a slit forming step of forming at least one slit by cutting or notching a part of the connecting member. A method for manufacturing a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure,
A storage member forming step of forming a cylindrical storage member on the metal sheet by partially deforming and projecting the metal sheet,
By removing a part of the thin metal plate, a supporting member forming step of forming a plurality of elongate supporting members extending radially starting from the periphery of the base portion of the storage member,
An extension member forming step of forming an extension member extending from each of the support members by removing a part of the metal sheet, and an extension member adjacent to each other extending from an adjacent support member. A method for manufacturing a cathode sleeve substrate. In the storage member forming step, a plurality of storage members are formed on the metal thin plate,
In the supporting member forming step, the plurality of supporting members are formed for each of the storage members,
35. The method according to claim 34, wherein in the step of forming the extension member, the extension member is formed for each of the storage members. The method for manufacturing the cathode sleeve substrate further includes:
The method for manufacturing a cathode sleeve substrate according to claim 35, further comprising: a bobbin winding step of winding the thin metal plate on which the plurality of storage members, the support members, and the extension members are formed around a bobbin. A method for manufacturing a cathode assembly using the cathode sleeve substrate according to claim 27,
A separating step of separating a set of the storage member, the support member, and the extension member from the metal sheet by cutting a part of the metal sheet;
A method for manufacturing a cathode structure, comprising: at least a welding step of welding a cylindrical holding member and the support member or the extension member after the separation. 38. The cathode according to claim 37, wherein the separation step is performed in a latter half of the steps required from the cathode sleeve substrate to the welding step in a time series manner. The method of manufacturing the structure. A method for manufacturing a cathode sleeve substrate as a base material when manufacturing a cathode sleeve structure,
A storage member forming step of forming a cylindrical storage member on the metal sheet by partially deforming and projecting the metal sheet,
By partially deforming the thin metal plate or the storage member, a step forming step of forming a step by making the thickness of the root periphery of the storage member thicker than other portions,
Forming a plurality of elongate support members extending radially from the periphery of the step by removing a part of the thin metal plate. Manufacturing method. In the storage member forming step, a plurality of storage members are formed on the metal thin plate,
40. The method according to claim 39, wherein in the supporting member forming step, the plurality of supporting members are formed for each of the storage members. The method for manufacturing the cathode sleeve substrate further includes:
The method for manufacturing a cathode sleeve substrate according to claim 39, further comprising a bobbin winding step of winding the thin metal plate on which the plurality of storage members and the support members are formed around a bobbin. A method of manufacturing a cathode assembly using the cathode sleeve substrate according to claim 39,
By separating a part of the metal sheet, a separating step of separating the set of the storage member and the support member from the metal sheet,
A bending step in which an end of the support member is fixed, and a part of the support member is bent by pressing down the end face of the step in the storage member in a direction from a protruding tip of the storage member toward a root. When,
A method for manufacturing a cathode structure, comprising: at least a welding step of welding a cylindrical holding member and the support member or the extension member after the separation. 43. The cathode according to claim 42, wherein the separation step is performed in a latter half of the steps required from the cathode sleeve substrate to the welding step in a time series manner. The method of manufacturing the structure.

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