JPS6347111B2 - - Google Patents
Info
- Publication number
- JPS6347111B2 JPS6347111B2 JP55148308A JP14830880A JPS6347111B2 JP S6347111 B2 JPS6347111 B2 JP S6347111B2 JP 55148308 A JP55148308 A JP 55148308A JP 14830880 A JP14830880 A JP 14830880A JP S6347111 B2 JPS6347111 B2 JP S6347111B2
- Authority
- JP
- Japan
- Prior art keywords
- focusing electrode
- wire
- fixed
- stem
- filament
- 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
- 239000012212 insulator Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/06—Cathodes
- H01J35/064—Details of the emitter, e.g. material or structure
Description
【発明の詳細な説明】
本発明は管軸方向の長さが短く、構造が簡単で
部品数の少ないＸ線管陰極構体に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an X-ray tube cathode assembly having a short length in the tube axis direction, a simple structure, and a small number of parts.
Ｘ線管の陰極は、陽極に射突する電子流の供給
源となるフイラメント、陽極ターゲツト上に使用
目的に即した焦点を形成するため上記電子流を集
束する集束電極を備え、更にその他にフイラメン
トおよび集束電極の保持機構、フイラメントを通
電加熱するための導入線等により構成される。 The cathode of an X-ray tube includes a filament that serves as a source of the electron flow that impinges on the anode, a focusing electrode that focuses the electron flow to form a focal point on the anode target according to the purpose of use, and a filament that serves as a source for the electron flow that impinges on the anode. It is composed of a holding mechanism for the focusing electrode, a lead-in wire for heating the filament, etc.
第１図は従来のＸ線管陰極構体の例を示し、集
束電極１に、フイラメント２を、絶縁物４および
固定金具５を介して集束電極に取付けた支持線
３，３′により固定支持させ、この様に組立てた
部分を、ステム６にホルダ７を用いて保持固定さ
せ、支持線３，３′をステム６に封入した導入線
８に接続して外部からフイラメントを通電加熱で
きるようになつている。ステム６はその端部を図
示してない管球外囲器に封着してある。従来のＸ
線管のこのような構造は、陰極に要求される機能
を満たし、また製造も容易なので広く利用されて
きたが、Ｘ線管を小形にする場合、陰極の管軸方
向長さの短縮は構造上困難であり、また集束電極
１と支持線３との絶縁物４を用いた組立構造は耐
熱性絶縁物を必要とするため高価となるなどの問
題があつた。 FIG. 1 shows an example of a conventional X-ray tube cathode structure, in which a filament 2 is fixedly supported on a focusing electrode 1 by support wires 3, 3' attached to the focusing electrode via an insulator 4 and a fixing fitting 5. The parts assembled in this way are held and fixed to the stem 6 using the holder 7, and the support wires 3 and 3' are connected to the lead-in wire 8 enclosed in the stem 6, so that the filament can be electrically heated from the outside. ing. The end of the stem 6 is sealed to a tube envelope (not shown). Conventional X
This structure of the ray tube has been widely used because it satisfies the functions required of the cathode and is easy to manufacture.However, when making the X-ray tube smaller, the length of the cathode in the tube axis direction must be shortened. In addition, the assembly structure of the focusing electrode 1 and the support wire 3 using the insulator 4 requires a heat-resistant insulator, which is expensive.
本発明の目的は、上記の如き問題のない、すな
わち小形で耐熱性絶縁物などを用いず、簡単で安
価な陰極構体を提供することにある。 An object of the present invention is to provide a simple and inexpensive cathode structure that does not have the above-mentioned problems, that is, is small, does not use a heat-resistant insulator, or the like.
上記目的を達成するために本発明においては、
ボタンステムを用いて管軸方向の長さを短縮し、
従来のピンチステムに比較してボタンステムは多
くの丈夫な導入線を封入できることを活用して集
束電極を複数の導入線に支持させ、集束電極の集
束みぞ底部には透孔を設け、フイラメント支持線
の少なくとも一方は集束電極に（何等特別な絶縁
物を用いずに）、接触しないように、この透孔を
通過させてステム導入線に接続して固定し、フイ
ラメント支持線の他方は集束電極に接続固定する
こととした。 In order to achieve the above object, in the present invention,
Shorten the length of the tube in the axial direction using a button stem,
Compared to the conventional pinch stem, the button stem can contain many strong lead-in wires, so the focusing electrode is supported by multiple lead-in wires, and a through hole is provided at the bottom of the focusing groove of the focusing electrode to support the filament. At least one of the wires is fixed to the focusing electrode (without using any special insulator) by passing through this hole and connecting to the stem introduction wire without contact, and the other end of the filament support wire is connected to the focusing electrode. I decided to fix the connection to.
第２図は本発明一実施例を示し、図中、９は集
束みぞ、１０，１０′は透孔、１１はボタンステ
ム、１２はしやへい筒で、その他の符号は第１図
の場合と同様である。集束みぞ９及びその底部に
透孔１０，１０′を設けた集束電極１は、ボタン
ステム１１に封入された導入線８に接続固定して
支持される。その後、フイラメント２を取付け固
定した一方の支持線３を、何等中間絶縁物を介在
させずに、かつ集束電極１に接触しないように透
孔１０を通らせて、集束電極１を支持するものと
は別の絶縁された導入線８に接続固定する。フイ
ラメント２の他方の支持線３′は透孔１０′に通
し、固定金具５を用いて集束電極１に接続固定す
る。また電気的しやへい、耐電圧向上などのため
に必要があれば、集束電極１の側面にしやへい筒
１２を取付け固定する。 FIG. 2 shows an embodiment of the present invention. In the figure, 9 is a focusing groove, 10 and 10' are through holes, 11 is a button stem, and 12 is a shield tube, and the other symbols are the same as in FIG. 1. It is similar to A focusing electrode 1, which has a focusing groove 9 and through holes 10, 10' at its bottom, is connected and fixedly supported by a lead-in wire 8 enclosed in a button stem 11. After that, one support wire 3 with the filament 2 attached and fixed is passed through the through hole 10 without intervening any intermediate insulator and without contacting the focusing electrode 1 to support the focusing electrode 1. is connected and fixed to another insulated lead-in wire 8. The other support wire 3' of the filament 2 is passed through the through hole 10' and connected and fixed to the focusing electrode 1 using the fixing metal fitting 5. Further, if necessary for electrical insulation, improvement of voltage resistance, etc., a shielding tube 12 is attached and fixed to the side surface of the focusing electrode 1.
以上説明したように本発明によれば、管軸方向
の寸法が短く、構造が簡単で耐熱絶縁物不要とな
り、低原価な陰極構体が得られる。 As explained above, according to the present invention, a cathode structure having a short dimension in the tube axis direction, a simple structure, no need for a heat-resistant insulator, and a low cost can be obtained.
第１図は従来のＸ線管陰極構体の例を示す側断
面図、第２図は本発明一実施例を示す側断面図で
ある。
１…集束電極、２…フイラメント、３，３′…
支持線、５…固定金具、８…導入線、９…集束み
ぞ、１０，１０′…透孔、１１…ボタンステム。
FIG. 1 is a side sectional view showing an example of a conventional X-ray tube cathode assembly, and FIG. 2 is a side sectional view showing an embodiment of the present invention. 1... Focusing electrode, 2... Filament, 3, 3'...
Support line, 5...Fixing metal fitting, 8...Introduction line, 9...Focusing groove, 10, 10'...Through hole, 11...Button stem.
Claims (1)
みぞ底部に透孔を設けた集束電極、導入線を封入
したボタンステムを備え、集束電極を複数本のス
テム導入線に固着して保持させ、前記支持線の少
なくとも一方は前記透孔を絶縁物を介在させずか
つ集束電極に接触させずに通過させてステム導入
線に接続固定し、他方の支持線は集束電極に接続
固定したことを特徴とするＸ線管陰極構体。1. A support wire to which a filament is attached and fixed, a focusing electrode with a through hole provided at the bottom of the focusing groove, and a button stem in which a lead-in wire is enclosed, the focusing electrode is fixed and held by a plurality of stem lead-in wires, and the support wire At least one of the supporting wires passes through the through-hole without intervening an insulator and without contacting the focusing electrode and is connected and fixed to the stem lead-in wire, and the other support wire is connected and fixed to the focusing electrode. Ray tube cathode structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55148308A JPS5772252A (en) | 1980-10-24 | 1980-10-24 | Cathode structure for x-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55148308A JPS5772252A (en) | 1980-10-24 | 1980-10-24 | Cathode structure for x-ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5772252A JPS5772252A (en) | 1982-05-06 |
| JPS6347111B2 true JPS6347111B2 (en) | 1988-09-20 |
Family
ID=15449876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55148308A Granted JPS5772252A (en) | 1980-10-24 | 1980-10-24 | Cathode structure for x-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5772252A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1007372A3 (en) * | 1993-07-28 | 1995-05-30 | Philips Electronics Nv | X-ray tube with improved heat exchange |
-
1980
- 1980-10-24 JP JP55148308A patent/JPS5772252A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5772252A (en) | 1982-05-06 |
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