JPH04129125A - Indirect heated cathode for cathode-ray tube and its manufacture - Google Patents

Indirect heated cathode for cathode-ray tube and its manufacture

Info

Publication number
JPH04129125A
JPH04129125A JP24714690A JP24714690A JPH04129125A JP H04129125 A JPH04129125 A JP H04129125A JP 24714690 A JP24714690 A JP 24714690A JP 24714690 A JP24714690 A JP 24714690A JP H04129125 A JPH04129125 A JP H04129125A
Authority
JP
Japan
Prior art keywords
cathode
heater
ray tube
indirectly heated
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP24714690A
Other languages
Japanese (ja)
Inventor
Ikuo Kamata
釜田 郁男
Ichiro Kuroda
黒田 一郎
Tamotsu Mori
保 森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Tungsten Co Ltd
Original Assignee
Tokyo Tungsten Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Tungsten Co Ltd filed Critical Tokyo Tungsten Co Ltd
Priority to JP24714690A priority Critical patent/JPH04129125A/en
Publication of JPH04129125A publication Critical patent/JPH04129125A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To lessen temperature difference between a heater and a cathode part so as to improve heat efficiency and lessen heater consumption power and make supporting structure stable and further enable to be manufactured simply, by connecting plural cathode supporting materials to depressions formed at an intermediate part of a metal cylindrical pipe. CONSTITUTION:A metal cylindrical pipe 1 has depressions 2 being formed by squeezing about its center part inward and protrusions 3 being formed on its inside. To these depression 2 parts the tips of cathode supporting materials 9, 9 being made of metal wire are connected and extending downward radially. There are three or four supporting materials 9, 9, and because their connected points are in the middle of the pipe 1, the thermal conductivity between a cathode part 5 and a heater 8 is not affected at all by the supporting materials 9, 9. Thereby the temperature difference between the heater and the cathode part is lessened, when the heater is heated, and the cathode part is heated, and heat efficiency is improved and consumption power of the heater is lessened and at the same time stable supporting structure is made, and further manufacture is possible to be made simple.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、テレビジョン用受像管、オシロスコープ用観
測管または撮像管などの陰極線管に用いられる傍熱型陰
極線用陰極部材に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an indirectly heated cathode ray cathode member used in a cathode ray tube such as a television picture tube, an oscilloscope observation tube, or an image pickup tube.

[従来の技術] 従来、この種の陰極線管用傍熱型陰極としては、特開昭
61−288339号公報に開示されたものがある。こ
の公報に開示されている陰極線管用傍熱型陰極は、加熱
用ヒータと、このヒータを内蔵する一端閉塞の高融点金
属製円筒パイプと、このパイプの閉塞端壁外面に付設さ
れた金属製のカップ及びカップ内部に内蔵された電子放
射性カソード部とを備えている。また、金属製のカップ
底面と金属製円筒パイプの一端との間には、2本の支持
用金属ワイヤの交叉部分が挾み込み、また、この状態で
カップと金属製円筒バイブは接合されている。
[Prior Art] Conventionally, as this type of indirectly heated cathode for cathode ray tubes, there is one disclosed in Japanese Patent Application Laid-Open No. 61-288339. The indirectly heated cathode for cathode ray tubes disclosed in this publication includes a heater, a cylindrical pipe made of a high melting point metal with one end closed and containing the heater, and a metal pipe attached to the outer surface of the closed end wall of the pipe. It includes a cup and an electron emitting cathode section built into the cup. In addition, the intersecting parts of the two supporting metal wires are inserted between the bottom of the metal cup and one end of the metal cylindrical pipe, and in this state, the cup and the metal cylindrical vibe are joined. There is.

「発明が解決しようとする課題] 上述したように、従来の陰極は、加熱用ヒータを内蔵す
る一端閉塞の金属製円筒パイプの閉塞端壁外面に金属製
のカップを溶接し、その内部に電子放射性カソード部を
内蔵する構成を有する。したがって、加熱用ヒータと電
子放射性カソード部との間には、金属製円筒パイプの閉
鎖端壁およびカップの底面が介在しており、電子放射性
カッド部は、これら2枚の金属板を介して加熱される。
``Problems to be Solved by the Invention'' As mentioned above, the conventional cathode consists of a metal cup welded to the outer surface of the closed end wall of a metal cylindrical pipe with a built-in heater and one end closed. It has a structure in which a radioactive cathode part is built in.Therefore, the closed end wall of the metal cylindrical pipe and the bottom surface of the cup are interposed between the heating heater and the electron radioactive cathode part, and the electron radioactive cathode part is Heating occurs via these two metal plates.

このため、加熱ヒータからの輻射熱が、金属製バイブや
カップから放射し、輻射熱損失が大きくなり、ヒータと
カソード部との間に大きな温度差が生じ、熱効率が劣り
、ヒータの消費電力が大きくなる等の問題点があった。
For this reason, radiant heat from the heater radiates from the metal vibrator or cup, increasing radiant heat loss, creating a large temperature difference between the heater and the cathode, decreasing thermal efficiency, and increasing power consumption of the heater. There were problems such as.

更に、カップと金属製の円筒バイブとは、金属ワイヤを
介して接合するためにその効率を著しく低いという欠点
がある。
Furthermore, the cup and the metal cylindrical vibrator are joined together via a metal wire, which has the disadvantage of significantly lowering efficiency.

また、2本の金属ワイヤを交叉させるために実質的に4
本でカソード部を支持する構造になり、その位置が移動
し易く、安定な構造であるとはいい難い。
In addition, in order to cross two metal wires, it is necessary to use substantially four wires.
The structure is such that the cathode part is supported by a book, and its position is easily moved, so it is difficult to say that it is a stable structure.

そこで、本発明は先に、金属製バイブの中間部分に絞り
加工を施すことにより、内側空間を上方と下方に分け、
上方にカソード部分を設ける一方、下方に加熱用ヒータ
を配置した陰極線管用傍熱型陰極を提案した。この陰極
構造では、ヒータとカソード部との温度差を少なくでき
るとともに、熱効率を向上させ、且っヒータ消費電力を
小さくすることができる。尚、ここでは、支持機構につ
いて、考慮されてはいない。
Therefore, the present invention first divides the inner space into upper and lower parts by drawing the middle part of the metal vibrator.
We proposed an indirectly heated cathode for cathode ray tubes, which has a cathode section above and a heater below. With this cathode structure, it is possible to reduce the temperature difference between the heater and the cathode portion, improve thermal efficiency, and reduce heater power consumption. Note that the support mechanism is not considered here.

そこで、本発明の技術的課題は、安定した支持構造を有
する上記した構造の陰極線管用傍熱型陰極を提供するこ
とにある。
Therefore, a technical object of the present invention is to provide an indirectly heated cathode for a cathode ray tube having the above-described structure and having a stable support structure.

さらに、本発明のもう一つの技術的課題は、簡単に製造
することができる陰極線管用傍熱型陰極の製造方法を提
供することにある。
Furthermore, another technical object of the present invention is to provide a method for manufacturing an indirectly heated cathode for a cathode ray tube that can be easily manufactured.

[課題を解決するための手段] 上述したような、従来の技術が有する課題を解決するた
めに、本発明は、中間部に絞り加圧によって形成された
円周に沿った窪みを有する高融点金属製バイブを備えた
陰極線管用傍熱型陰極において、前記窪みに複数の陰極
支持材を接続してなることを特徴とする陰極線管用傍熱
型陰極である。
[Means for Solving the Problems] In order to solve the above-mentioned problems of the conventional technology, the present invention provides a high melting point material having a circumferential depression formed by squeezing and pressing in the middle part. This indirectly heated cathode for a cathode ray tube is equipped with a metal vibrator, and is characterized in that a plurality of cathode supports are connected to the recess.

本発明は、前記陰極線管用傍熱型陰極において、前記複
数の陰極支持材の少なくとも一つは前記窪みに接合され
ていることを特徴とする陰極線管用傍熱型陰極である。
The present invention provides the indirectly heated cathode for a cathode ray tube, characterized in that at least one of the plurality of cathode supporting materials is joined to the recess.

また、本発明は、前記陰極線管用傍熱型陰極において、
前記窪みから実質的に3本の陰極支持材が延在すること
を特徴とする陰極線管用傍熱型陰極である。
The present invention also provides the indirectly heated cathode for a cathode ray tube, comprising:
The indirectly heated cathode for a cathode ray tube is characterized in that substantially three cathode supporting members extend from the recess.

更に、本発明は、中間部に絞り加工によって形成された
円周に沿った窪みを有する高融点金属製バイブを備えた
傍熱陰極本体の前記窪みに複数の陰極支持材を接続する
ことを特徴とする陰極線管用傍熱型陰極の製造方法であ
る。
Furthermore, the present invention is characterized in that a plurality of cathode supports are connected to the recesses of the indirectly heated cathode body, which is equipped with a refractory metal vibrator having a circumferential recess formed by drawing in the middle part. This is a method for manufacturing an indirectly heated cathode for a cathode ray tube.

尚、本発明において、高融点金属とは、モリブデン、タ
ンタル等を含む高い融点を有する金属または合金をいう
。また、本発明において、陰極支持材とは、陰極線管用
傍熱型陰極本体を支持するための金属ワイヤ、金属テー
プ、長尺状の金属薄板等をいう。
In the present invention, the high melting point metal refers to a metal or alloy having a high melting point, including molybdenum, tantalum, and the like. In the present invention, the cathode support material refers to a metal wire, a metal tape, a long thin metal plate, etc. for supporting the indirectly heated cathode body for a cathode ray tube.

[作 用] 本発明においては、モリブデンバイブの中間部の周面に
沿って形成された窪みに複数の陰極支持材を接続するこ
とで、陰極線管用傍熱型陰極本体を簡単にかつ安定に支
持することができる。
[Function] In the present invention, by connecting a plurality of cathode supporting materials to the recess formed along the circumferential surface of the intermediate portion of the molybdenum vibe, the indirectly heated cathode body for a cathode ray tube can be easily and stably supported. can do.

[実施例] 以下、本発明の実施例を添附図面に基づいて詳細に説明
する。
[Example] Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

第1図は本発明の第1の実施例に係る陰極線管用傍熱型
陰極の構造を説明するための断面図である。第1図にお
いて、材質がモリブデンで全長5゜75mm、厚さ35
μm以下の金属製円筒パイプ1は、略中央部を上端から
0.4〜0.7mmの位置を内側に絞って形成された窪
み2とこれに対応して内側に形成された突出部3を有す
る。 また、5〜50μmの厚みの金属製円板4が金属
製円筒バイブ1の結果としてできた空間上端から1人さ
れ、突出部3に着座されており、この金属シ円板4に加
熱溶接により突出部3に接合されて−る。これにより、
金属製円筒バイブ1の内部窓iは、上下2つの空間10
a、10bに区画され2続いて、この空間部10aには
、ポーラスなタングステン焼結体の含浸カソードからな
るカソード部5が挿入され、金属製円板4とカソード部
5Jは金属製円筒バイブ1の外周がら溶接により接戸さ
れている。
FIG. 1 is a sectional view for explaining the structure of an indirectly heated cathode for a cathode ray tube according to a first embodiment of the present invention. In Figure 1, the material is molybdenum, the total length is 5°75mm, and the thickness is 35mm.
A metal cylindrical pipe 1 with a diameter of less than μm has a depression 2 formed by squeezing the approximately central part inward at a position of 0.4 to 0.7 mm from the upper end, and a protrusion 3 formed inward corresponding to the depression 2. have In addition, a metal disc 4 with a thickness of 5 to 50 μm is inserted from the upper end of the space created as a result of the metal cylindrical vibrator 1 and is seated on the protrusion 3. It is joined to the protrusion 3. This results in
The internal window i of the metal cylindrical vibe 1 has two spaces 10 above and below.
a and 10b 2 Subsequently, a cathode part 5 made of a cathode impregnated with a porous sintered tungsten body is inserted into this space part 10a, and the metal disk 4 and the cathode part 5J are connected to the metal cylindrical vibe 1. The door is attached by welding the outer periphery of the door.

カソード部5としては、タングステン系焼結□にBa系
エミツタ材”を含浸させた含浸カソードが使用されてい
る。またカソード部5の表面は電子の放射を容易にする
ように、オスミニウム膜7が設けられている。熱吸収性
膜5としては、従来の技術で開示されているような、平
均粒子径が5μm以下の高融点金属粉末、例えば、タン
グステン粉末を含有する焼結膜を使用する。他方、下部
空間には、加熱用ヒータ8が収容されている。
As the cathode part 5, an impregnated cathode in which tungsten-based sintered □ is impregnated with a Ba-based emitter material is used.The surface of the cathode part 5 is coated with an osminium film 7 to facilitate electron emission. As the heat-absorbing film 5, a sintered film containing high-melting point metal powder, such as tungsten powder, with an average particle size of 5 μm or less, as disclosed in the prior art, is used. , a heating heater 8 is accommodated in the lower space.

この場合、金属製円筒バイブ1に対して金属製円板4を
溶接することにより、金属製円板4を金属製円筒バイブ
1に固着しても良い。また、図示された金属製円筒バイ
ブ1の下端1aは広げ加工により拡大された直径を有し
ている。金属製円筒バイブ1の下側空間10bの内周面
には、熱吸収性膜6が形成されている。
In this case, the metal disk 4 may be fixed to the metal cylindrical vibe 1 by welding the metal disk 4 to the metal cylindrical vibe 1. Further, the lower end 1a of the illustrated metal cylindrical vibrator 1 has a diameter enlarged by expansion processing. A heat absorbing film 6 is formed on the inner peripheral surface of the lower space 10b of the metal cylindrical vibe 1.

更に、窪み2部分に金属ワイヤからなる陰極支持材9.
9の先端が接合され、下方に放射状に延在している。こ
の陰極支持材9.9は、3本又は4本であり、陰極支持
材9.9の接続位置は金属製円筒バイブ1の中間である
ため、これらの陰極支持材9.9によって、カソード部
5と加熱用ヒータ8との間の熱伝導性には何等影智を与
えない。
Furthermore, a cathode support material 9 made of metal wire is placed in the 2 portions of the depression.
The tips of 9 are joined and extend radially downward. There are three or four cathode supporting materials 9.9, and since the connecting position of the cathode supporting materials 9.9 is in the middle of the metal cylindrical vibe 1, these cathode supporting materials 9.9 connect the cathode portion This does not affect the thermal conductivity between the heating element 5 and the heating heater 8 in any way.

この陰極線管用傍熱型陰極は次のように製造される。This indirectly heated cathode for a cathode ray tube is manufactured as follows.

第1図で示される金属製円筒バイブ1に、43%Ru 
−M oからなる粉末状のろう材を金属製円板に塗布し
て挿入して着座させ、1750’Cにて真空中または水
素雰囲気中でろう付けする。
43% Ru was added to the metal cylindrical vibrator 1 shown in FIG.
A powdered brazing filler metal made of -Mo is applied to a metal disk, inserted and seated, and brazed at 1750'C in a vacuum or in a hydrogen atmosphere.

第1図中の11は接合に用いたろう材を示している。11 in FIG. 1 indicates a brazing material used for joining.

更に、カソード部5を挿入して、周囲から電気溶接を行
うと、カソード部5以外のパイプ1の空間10bの内周
面に熱吸収性膜6および加熱用ヒータ8を挿入して、第
1図に示す陰極線管用傍熱型陰極が得られる。
Furthermore, when the cathode part 5 is inserted and electric welding is performed from the periphery, a heat absorbing film 6 and a heating heater 8 are inserted into the inner peripheral surface of the space 10b of the pipe 1 other than the cathode part 5, and the first An indirectly heated cathode for a cathode ray tube as shown in the figure is obtained.

第2図は本発明の第2の実施例に係る陰極線管用傍熱型
陰極を示す断面図である。
FIG. 2 is a sectional view showing an indirectly heated cathode for a cathode ray tube according to a second embodiment of the present invention.

第2の実施例に係る傍熱型陰極は、第1の実施例とは、
金属製円筒バイブ1の開口端1bが絞り加工されている
他に、陰極支持材9′、9−接合方向が異なっている。
The indirectly heated cathode according to the second embodiment is different from the first embodiment.
In addition to being drawn at the open end 1b of the metal cylindrical vibrator 1, the cathode supports 9' and 9 are joined in different directions.

即ち、金属ワイヤからなる陰極支持材9”、9−は、そ
の先端が窪み2に溶接され下方に延在するとともに、下
端近傍で折曲し、上方にかつ放射方向に延在している。
That is, the cathode supporting members 9'', 9- made of metal wires have their tips welded to the depressions 2 and extend downward, are bent near their lower ends, and extend upward and radially.

以上述べた以外の構造は、第1の実施例と同様であるか
ら説明を省略する。
The structure other than that described above is the same as that of the first embodiment, so the explanation will be omitted.

尚、第1図及び第2図において、カソード部5表面は電
子の放射を容易にするように、オスミニウム膜7が設け
られている。
In FIGS. 1 and 2, an osminium film 7 is provided on the surface of the cathode portion 5 to facilitate electron emission.

第3図(a)及び(b)は本発明の実施例に係る陰極線
管用傍熱型陰極の支持構造の第1の例を示す図である。
FIGS. 3(a) and 3(b) are diagrams showing a first example of a support structure for an indirectly heated cathode for a cathode ray tube according to an embodiment of the present invention.

図において中央の円2aは窪み2の横断面を示している
。第3図(a)に示すように、円2aの円周の2/3の
長さである金属ワイヤ31の円弧部31aの中央部分に
、これと同村からなる金属ワイヤー32の先端32gが
接合されて、陰極支持材3oを形成している。
In the figure, the center circle 2a shows the cross section of the depression 2. As shown in FIG. 3(a), the tip 32g of the metal wire 32 having the same length is joined to the center part of the circular arc portion 31a of the metal wire 31, which has a length of 2/3 of the circumference of the circle 2a. and forms a cathode support material 3o.

第3図(b)に示すように、円2aに陰極支持材30の
円弧部が巻かれ、陰極支持材の折り曲げ部分31a、3
1bにおいてろう付けされて、各枝部31c、31d、
32はその延在方向が窪みを示す円2aの中心に対して
互いに120#の角をなす。
As shown in FIG. 3(b), the arc portion of the cathode support material 30 is wound around the circle 2a, and the bent portions 31a, 3 of the cathode support material are wrapped around the circle 2a.
1b, each branch 31c, 31d,
32, the extending directions thereof form an angle of 120# with respect to the center of the circle 2a indicating the depression.

このような陰極支持材3oは陰極本体を三点で支持する
ため、4点で支持するものよりも安定に支持される。
Since such a cathode support material 3o supports the cathode body at three points, it is supported more stably than one that supports it at four points.

第4図(a)及び(b)は本発明の実施例に係る陰極線
管用傍熱型陰極の支持構造の第2の例を示す図である。
FIGS. 4(a) and 4(b) are diagrams showing a second example of a support structure for an indirectly heated cathode for a cathode ray tube according to an embodiment of the present invention.

図において中央の円2aは前述と同様に窪み2部分の横
断面を示している。
In the figure, the circle 2a in the center indicates the cross section of the 2 portions of the depressions, as described above.

第4図(a)に示すように、横断面を形成する円周の1
/4の長さに等しい円弧41a、42gを中央に有する
金属ワイヤからなる陰極支持材41.42を、円2aを
介して互いに対向させて、第6図(b)のように配置し
、円2aに、円弧部41.42を突当てて、符号46,
47.48゜49で示される部分でろう付けして4点支
持を構成している。
As shown in Figure 4(a), one of the circumferences forming the cross section
Cathode supports 41 and 42 made of metal wires having circular arcs 41a and 42g equal to the length of /4 at the center are arranged facing each other across the circle 2a as shown in FIG. 6(b). 2a, the circular arc portions 41 and 42 are brought into contact with each other.
The parts indicated by 47, 48° and 49 are brazed to form a four-point support.

尚、上述の例では、陰極支持材として、モリブデン線ま
たはタングステン線等の高融点金属ワイヤを用いたが、
同じ材料からなる長尺状の金属薄板または金属テープを
用いることもできる。
In the above example, a high melting point metal wire such as a molybdenum wire or a tungsten wire was used as the cathode support material.
It is also possible to use a long thin metal plate or metal tape made of the same material.

また、第3図及び第4図の陰極支持構造は、第1図およ
び第2図のうちのいずれの傍熱型陰極にも適用すること
ができる。
Further, the cathode support structure shown in FIGS. 3 and 4 can be applied to any of the indirectly heated cathodes shown in FIGS. 1 and 2.

[発明の効果] 以上述べたように、本発明では、上方にカソード部を設
け、下部に加熱用ヒータを配置した金属製バイブを形成
した陰極線管用傍熱型陰極において、加熱用ヒータを加
熱し、カソード部を加熱する際、ヒータとカソード部と
の温度差を少なくし、熱効率を向上させ、ヒータの消費
電力を小さくした陰極線管用傍熱型陰極を提供すること
かできる。
[Effects of the Invention] As described above, in the present invention, in an indirectly heated cathode for a cathode ray tube that forms a metal vibrator in which a cathode portion is provided above and a heating heater is arranged below, the heater is heated. Therefore, it is possible to provide an indirectly heated cathode for a cathode ray tube that reduces the temperature difference between the heater and the cathode when heating the cathode, improves thermal efficiency, and reduces power consumption of the heater.

また、本発明によれば、窪みに陰極支持材を接続するこ
とで安定な支持構造を有する陰極線管用傍熱型陰極を提
供することかできる。
Further, according to the present invention, it is possible to provide an indirectly heated cathode for a cathode ray tube that has a stable support structure by connecting a cathode support material to the recess.

さらに、本発明によれば、陰極線管用傍熱型陰極本体の
製造が容易でありまた陰極支持構造を陰極支持材を接続
することで簡単に製造することができる陰極線管用傍熱
型陰極の製造方法を提供することができる。
Further, according to the present invention, a method for manufacturing an indirectly heated cathode for a cathode ray tube, in which it is easy to manufacture an indirectly heated cathode body for a cathode ray tube, and the cathode support structure can be easily manufactured by connecting a cathode support material. can be provided.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の第1の実施例に係る陰極線管用傍熱型
陰極を示す断面図、第2図は本発明の第2の実施例に係
る陰極線管用傍熱型陰極を示す断面図、第3図(a)及
び(b)は本発明の実施例に係る陰極線管用傍熱型陰極
の第1の支持構造例を示す図、第4図は(a)及び(b
)は本発明の実施例に係る陰極線管用傍熱型陰極の第2
の文構造例を示す図である。 図中、1・・・金属製円筒バイブ、2・・・窪み、3突
出部、10a、10b・・・空間、4・・・金属製円5
・・・カソード部、6・・・熱吸収性膜、7・・・オス
ミウム膜、8・・・加熱用ヒータ、9,9′・・・陰極
支材、30・・・陰極支持材、31・・・金属ワイヤ、
442・・・陰極支持材。 持 板、 持 1゜ 第4図
FIG. 1 is a sectional view showing an indirectly heated cathode for a cathode ray tube according to a first embodiment of the present invention, and FIG. 2 is a sectional view showing an indirectly heated cathode for a cathode ray tube according to a second embodiment of the invention. 3(a) and (b) are diagrams showing a first example of the support structure of an indirectly heated cathode for a cathode ray tube according to an embodiment of the present invention, and FIG. 4 is a diagram (a) and (b).
) is the second indirectly heated cathode for a cathode ray tube according to an embodiment of the present invention.
FIG. 2 is a diagram showing an example of a sentence structure. In the figure, 1...metal cylindrical vibe, 2...dent, 3 protrusion, 10a, 10b...space, 4...metal circle 5
. . . Cathode part, 6 . ...metal wire,
442...Cathode support material. Holding board, Holding 1゜Fig. 4

Claims (1)

【特許請求の範囲】 1、中間部に絞り加工によって形成された円周に沿った
窪みを有する高融点金属製パイプを備えた陰極線管用傍
熱型陰極において、 前記窪みに複数の陰極支持材を接続してなることを特徴
とする陰極線管用傍熱型陰極。 2、第1請求項記載の陰極線管用傍熱型陰極において、
前記複数の陰極支持材の少なくとも一つは前記窪みに接
合されていることを特徴とする陰極線管用傍熱型陰極。 3、第2請求項記載の陰極線管用傍熱型陰極において、
前記窪みから実質的に3本の陰極支持材が延在すること
を特徴とする陰極線管用傍熱型陰極。 4、中間部に絞り加工によって形成された円周に沿った
窪みを有する高融点金属製パイプを備えた傍熱陰極本体
の前記窪みに複数の陰極支持材を接続することを特徴と
する陰極線管用傍熱型陰極の製造方法。
[Claims] 1. In an indirectly heated cathode for a cathode ray tube, the cathode is equipped with a pipe made of a high melting point metal and has a circumferential depression formed by drawing in the middle, comprising: a plurality of cathode supporting materials in the depression; An indirectly heated cathode for a cathode ray tube characterized by being connected. 2. In the indirectly heated cathode for a cathode ray tube according to the first claim,
An indirectly heated cathode for a cathode ray tube, wherein at least one of the plurality of cathode supporting materials is joined to the recess. 3. In the indirectly heated cathode for a cathode ray tube according to the second claim,
An indirectly heated cathode for a cathode ray tube, characterized in that substantially three cathode supporting members extend from the recess. 4. For a cathode ray tube, characterized in that a plurality of cathode supports are connected to the recesses of an indirectly heated cathode body, which is equipped with a refractory metal pipe having a circumferential recess formed by drawing in the middle part. Method for manufacturing an indirectly heated cathode.
JP24714690A 1990-09-19 1990-09-19 Indirect heated cathode for cathode-ray tube and its manufacture Pending JPH04129125A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24714690A JPH04129125A (en) 1990-09-19 1990-09-19 Indirect heated cathode for cathode-ray tube and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24714690A JPH04129125A (en) 1990-09-19 1990-09-19 Indirect heated cathode for cathode-ray tube and its manufacture

Publications (1)

Publication Number Publication Date
JPH04129125A true JPH04129125A (en) 1992-04-30

Family

ID=17159120

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24714690A Pending JPH04129125A (en) 1990-09-19 1990-09-19 Indirect heated cathode for cathode-ray tube and its manufacture

Country Status (1)

Country Link
JP (1) JPH04129125A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS447531Y1 (en) * 1966-06-29 1969-03-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS447531Y1 (en) * 1966-06-29 1969-03-22

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