JPS60112056U

JPS60112056U - electron gun

Info

Publication number: JPS60112056U
Application number: JP20035283U
Authority: JP
Inventors: 岩塚　正俊
Original assignee: 関西日本電気株式会社
Priority date: 1983-12-29
Filing date: 1983-12-29
Publication date: 1985-07-29

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の電子銃における第１グリツド電極の具体
例を示す部分断面図、第２図は第１図の第１グリツド電
極のインシュレータを示す平面図、第３図は第１図の要
部拡大断面図、第４図は本考案に係る電子銃における第
１グリツド電極の一実施例を示す部分断面図、第５図は
第４図の第　　。１グリツド電極のインシュレータを示す平面図、第６図
は第４図の要部拡大断面図である。１・・・・・・底面、３・・・・・・電子ビーム透過孔
、１０′・・・・・・インシュレータ、１０ａ’・・・
・・・対向面、１０ｂ′・・・・・・裏面、１６・・・
・・・ガス抜き穴、Ｇ１・・・・・・第１　−グリッド
電極、Ｋ・・・・・・カソード。FIG. 1 is a partial sectional view showing a specific example of the first grid electrode in a conventional electron gun, FIG. 2 is a plan view showing an insulator of the first grid electrode in FIG. 1, and FIG. FIG. 4 is a partially enlarged sectional view showing an embodiment of the first grid electrode in the electron gun according to the present invention, and FIG. 5 is a partial sectional view of FIG. 4. FIG. 6 is a plan view showing an insulator of one grid electrode, and FIG. 6 is an enlarged sectional view of the main part of FIG. 4. 1... Bottom surface, 3... Electron beam transmission hole, 10'... Insulator, 10a'...
...Opposing surface, 10b'... Back surface, 16...
...Gas vent hole, G1...1st -grid electrode, K...Cathode.

Claims

[Scope of utility model registration request]

A cathode supported and fixed to an insulator is housed in a bottomed cylindrical first grid electrode having an electron beam transmission hole at the bottom, wherein the first grid electrode of the insulator is
An electron gun characterized by having a taper-shaped gas vent hole that decreases in diameter from the surface facing the bottom surface of the grid electrode toward the back surface and extends through the grid electrode.