JPS6323867Y2 - - Google Patents
Info
- Publication number
- JPS6323867Y2 JPS6323867Y2 JP2442881U JP2442881U JPS6323867Y2 JP S6323867 Y2 JPS6323867 Y2 JP S6323867Y2 JP 2442881 U JP2442881 U JP 2442881U JP 2442881 U JP2442881 U JP 2442881U JP S6323867 Y2 JPS6323867 Y2 JP S6323867Y2
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- diameter portion
- thick
- sleeve
- hat
- 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.)
- Expired
Links
- 101100226116 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) esa-1 gene Proteins 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Microwave Tubes (AREA)
Description
【考案の詳細な説明】
この考案は、マグネトロンの陰極構体に関す
る。[Detailed Description of the Invention] This invention relates to a cathode structure for a magnetron.
従来、大電力パルスマグネトロンの陰極構体
は、例えば実開昭54−47350号として公開された
明細書および図面に示されているように、いわゆ
る傍熱型であつて、ヒータを内蔵したモリブデン
製陰極スリーブの外周に、ポーラスタングステン
円筒にBaO，Al2O3，CaOからなる電子放射物質
が含浸された円筒状電子放射部が高融点ろう材に
よりろう接され、この電子放射部の両端部に一対
の高融点金属製エンドハツトが設けられた構成を
有する。 Conventionally, the cathode structure of a high-power pulsed magnetron has been of the so-called indirectly heated type, and has a molybdenum cathode with a built-in heater, as shown in the specification and drawings published as Utility Model Application No. 54-47350, for example. A cylindrical electron emitting part, which is a porous tungsten cylinder impregnated with an electron emitting material made of BaO, Al 2 O 3 and CaO, is soldered to the outer periphery of the sleeve using a high melting point brazing material, and a pair of electron emitting parts are attached to both ends of the sleeve. It has a structure in which an end hat made of high melting point metal is provided.
ところが上記のような従来の陰極構体では、エ
ンドハツトと陰極スリーブの取付けは一般に溶接
により行なつており、エンドハツトと陰極スリー
ブとを全周にわたつて密着して接合することを目
的としている。そのため、動作時には、エンドハ
ツトの温度が陰極スリーブと同程度に上昇し、そ
の結果、エンドハツトからエミツシヨン（２次電
子）放出が行なわれる。従つてパルスの立上りが
不安定、発振スペクトラムが不良、アーキングが
多い、寿命が短かい等の欠点がある。 However, in the conventional cathode assembly as described above, the end hat and the cathode sleeve are generally attached by welding, and the purpose is to join the end hat and the cathode sleeve in close contact over the entire circumference. Therefore, during operation, the temperature of the end hat rises to the same extent as that of the cathode sleeve, and as a result, the end hat emits emissions (secondary electrons). Therefore, there are drawbacks such as unstable pulse rise, poor oscillation spectrum, frequent arcing, and short life.
この考案は上記従来の欠点を除去したマグネト
ロンの陰極構体を提供することを目的とする。 The object of this invention is to provide a magnetron cathode structure that eliminates the above-mentioned conventional drawbacks.
以下、図面を参照してこの考案の一実施例を詳
細に説明する。この考案の陰極構体は第１図に示
すように構成され、ヒーター１を内蔵した陰極ス
リーブ２の外周には、径大部２ａが一体に突設形
成され、この厚肉の径大部２ａの外周に含浸形陰
極のような所定長さの円筒状電子放射部３が固定
されている。そして、この円筒状電子放射部３の
軸方向両端にはそれぞれリング状の一対のエンド
ハツト４，５が配設され、陰極スリーブ２の厚肉
径大部２ａに固定されている。この場合、第２図
ａ，ｂおよび第４図に示すように各エンドハツト
４，５の外端面の内周には予め例えば三角形のス
リツト６が複数例えば４個対向して穿設されてい
る。そして、エンドハツト４の外端面と厚肉径大
部２ａの外端面とは同一面上に位置されており、
エンドハツト４の内端面は電子放射部３に係止さ
れている。エンドハツトの固定構造は、第３図
ａ，ｂからも明らかな如く、組立時にスリツト６
に対応した陰極スリーブ２の厚肉径大部２ａの外
端面をポンチ等の工具によりかしめて変形させ、
エンドハツト４，５を陰極スリーブ２の径大部外
周１に固着している。尚、かしめを行なつた箇所
Ａはかしめの力で変形が生じ、予め設けてあるス
リツト６に食い込むことになる。尚、第２図及び
第３図では一方のエンドハツト４についてのみ説
明したが、他方のエンドハツト５についても同様
であることは言う迄もない。 Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings. The cathode structure of this invention is constructed as shown in FIG. 1, and a large-diameter portion 2a is integrally formed on the outer periphery of a cathode sleeve 2 in which a heater 1 is built. A cylindrical electron emitting part 3 having a predetermined length, such as an impregnated cathode, is fixed to the outer periphery. A pair of ring-shaped end hats 4 and 5 are disposed at both axial ends of the cylindrical electron emitting portion 3, and are fixed to the thick large diameter portion 2a of the cathode sleeve 2. In this case, as shown in FIGS. 2a and 2b and FIG. 4, a plurality of, for example, four triangular slits 6 are previously bored on the inner periphery of the outer end surface of each end hat 4, 5, facing each other. The outer end surface of the end hat 4 and the outer end surface of the thick large diameter portion 2a are located on the same plane.
The inner end surface of the end hat 4 is locked to the electron emitting part 3. As is clear from Figures 3a and b, the end hat fixing structure is such that the slit 6 is inserted during assembly.
The outer end surface of the thick large diameter portion 2a of the cathode sleeve 2 corresponding to the above is deformed by caulking with a tool such as a punch,
End hats 4 and 5 are fixed to the outer periphery 1 of the large diameter portion of the cathode sleeve 2. Note that the caulked portion A is deformed by the force of caulking and bites into the slit 6 that has been provided in advance. Although only one end hat 4 has been described in FIGS. 2 and 3, it goes without saying that the same applies to the other end hat 5.
この考案の陰極構体は上記説明及び図示のよう
に構成され、エンドハツト４，５の内周に複数の
スリツト６を形成し、このスリツト６に陰極スリ
ーブ２の厚肉径大部の一部を食い込ませるように
対応位置をかしめているので、エンドハツト４，
５は上下左右に動くことがなく、信頼性が著しく
向上する。又、この考案の構造では、陰極スリー
ブの厚肉径大部の外周面とエンドハツトの内周面
との間にかしめ位置以外の多くの部分に図示しな
いがごくわずかの隙間が生じ、スリーブからエン
ドハツトへの熱伝導が抑制される。それにより、
エンドハツト４，５の温度を上げないで電子放射
部を動作させ得るため、従来、問題となつていた
エンドハツトのエミツシヨン放出を低下させ、従
来の欠点を改善することができる。更にエンドハ
ツト４，５を陰極スリーブ２にかしめ固定すると
き、軸対称の点を同時にかしめ加工すれば、エン
ドハツト４，５と陰極スリーブ２の同心度が容易
に得られる。又、この考案は製造簡単にして安価
であることは言う迄もない。 The cathode structure of this invention is constructed as described above and shown in the drawings, and a plurality of slits 6 are formed on the inner periphery of the end hats 4 and 5, and a part of the large diameter portion of the cathode sleeve 2 is bitten into the slits 6. The corresponding position is caulked so that the end hat 4,
5 does not move vertically, horizontally, or horizontally, significantly improving reliability. Furthermore, in the structure of this invention, a very small gap (not shown) is created between the outer circumferential surface of the thick-walled, large-diameter portion of the cathode sleeve and the inner circumferential surface of the end hat in many areas other than the caulking position, and the gap between the sleeve and the end hat is very small. Heat conduction to is suppressed. Thereby,
Since the electron emitting section can be operated without increasing the temperature of the end hats 4 and 5, the emission emission of the end hats, which has been a problem in the past, can be reduced and the conventional drawbacks can be improved. Furthermore, when the end hats 4, 5 are caulked and fixed to the cathode sleeve 2, concentricity between the end hats 4, 5 and the cathode sleeve 2 can be easily obtained by caulking axially symmetrical points at the same time. Moreover, it goes without saying that this invention is easy to manufacture and inexpensive.
尚、上記実施例ではスリツト６は三角形であつ
たが、第５図に示すような半円形のスリツト８で
もよい。 Although the slit 6 was triangular in the above embodiment, it may also be a semicircular slit 8 as shown in FIG.
又、同じ四角形のスリツト６でも断面で見れ
ば、第６図のような断面三角形、第７図のような
断面四角形が考えられる。 Also, when looking at the cross section of the same rectangular slit 6, it can be considered to have a triangular cross section as shown in FIG. 6, and a rectangular cross section as shown in FIG.
以上説明したようにこの考案によれば、工業的
価値大なるマグネトロンの陰極構体を提供するこ
とができる。 As explained above, according to this invention, it is possible to provide a magnetron cathode structure of great industrial value.
第１図はこの考案の一実施例に係る陰極構体を
示す軸方向断面図、第２図ａ，ｂはこの考案の陰
極構体におけるかしめ前を示す平面図と軸方向断
面図、第３図ａ，ｂは同じくかしめ後を示す平面
図と軸方向断面図、第４図はその要部上面図、第
５図乃至第７図はそれぞれこの考案の変形例を示
す要部上面図および縦断面図である。
１……ヒーター、２……陰極スリーブ、２ａ…
…厚肉径大部、３……円筒状電子放射部、４，５
……エンドハツト、６……スリツト、Ａ……かし
め箇所。
FIG. 1 is an axial cross-sectional view showing a cathode structure according to an embodiment of this invention, FIGS. 2 a and b are a plan view and an axial cross-sectional view showing the cathode structure of this invention before caulking, and FIG. 3 a , b are a plan view and an axial sectional view showing the same state after caulking, FIG. 4 is a top view of the main part, and FIGS. 5 to 7 are a top view and longitudinal sectional view of the main part showing modifications of this invention, respectively. It is. 1...Heater, 2...Cathode sleeve, 2a...
...Thick wall large diameter part, 3...Cylindrical electron emitting part, 4, 5
... End hat, 6... Slit, A... Caulking point.
Claims (1)
ーブ２と、 この陰極スリーブの上記厚肉径大部の外周に固
定された円筒状の電子放射部３と、 この円筒状電子放射部を間に挾んで上記厚肉径
大部の外周に固定された一対のエンドハツト４，
５と、 上記陰極スリーブ内に配置されたヒータ１とを
具備してなるマグネトロンにおいて、 上記エンドハツトの外端面の内周部に複数のス
リツト６が形成されており、 該エンドハツトの外端面と上記陰極スリーブの
厚肉径大部の外端面とが同一面上に位置され、 且つ、前記厚肉径大部の一部が上記エンドハツ
トのスリツトに食込むようにかしめられて固定さ
れてなることを特徴とするマグネトロンの陰極構
体。[Claims for Utility Model Registration] A cathode sleeve 2 partially provided with a thick-walled large-diameter portion 2a, and a cylindrical electron emitting portion 3 fixed to the outer periphery of the thick-walled large-diameter portion of the cathode sleeve. and a pair of end hats 4 fixed to the outer periphery of the thick-walled large-diameter portion with the cylindrical electron emitting portion sandwiched between them.
5 and a heater 1 disposed within the cathode sleeve, a plurality of slits 6 are formed on the inner circumference of the outer end face of the end hat, and the outer end face of the end hat and the cathode The outer end surface of the thick walled large diameter portion of the sleeve is located on the same plane, and a part of the thick wall large diameter portion is fixed by caulking so as to bite into the slit of the end hat. The cathode structure of the magnetron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2442881U JPS585269U (en) | 1981-02-23 | 1981-02-23 | Magnetron cathode structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2442881U JPS585269U (en) | 1981-02-23 | 1981-02-23 | Magnetron cathode structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS585269U JPS585269U (en) | 1983-01-13 |
| JPS6323867Y2 true JPS6323867Y2 (en) | 1988-06-30 |
Family
ID=29822145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2442881U Granted JPS585269U (en) | 1981-02-23 | 1981-02-23 | Magnetron cathode structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS585269U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7240247B2 (en) * | 2019-05-16 | 2023-03-15 | 日清紡マイクロデバイス株式会社 | magnetron |
-
1981
- 1981-02-23 JP JP2442881U patent/JPS585269U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS585269U (en) | 1983-01-13 |
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