JPS5986650U

JPS5986650U - Electron gun for cathode ray tube

Info

Publication number: JPS5986650U
Application number: JP18341982U
Authority: JP
Inventors: 鎌田　豊一
Original assignee: 三菱電機株式会社
Priority date: 1982-12-01
Filing date: 1982-12-01
Publication date: 1984-06-12

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は陰極線管の電子銃部分の一例を示す断面図、第
２図は従来の電子銃のＧ電極と陰極構体の組立て状態を
拡大した断面図、第３図はこの考案の一実施例を示すＧ
□電極と陰極構体の組立て状態を拡大した断面図、第４
図は陰極構体組立工程を示す断面図である。３・・・・・・第１グリツド電極、３ａ・・・・・・電
子ビーム通過孔、８・・・・・・陰極構体、９・・・・
・・電子放射面、１０・・・・・・絶縁基体。なお、図
中同一符号は同一または相当部分を示す。第１図第４図Fig. 1 is a cross-sectional view showing an example of the electron gun portion of a cathode ray tube, Fig. 2 is an enlarged cross-sectional view of the assembled state of the G electrode and cathode structure of a conventional electron gun, and Fig. 3 is an example of an embodiment of this invention. G indicating
□Expanded cross-sectional view of the assembled state of the electrode and cathode structure, No. 4
The figure is a sectional view showing the cathode structure assembly process. 3...First grid electrode, 3a...Electron beam passing hole, 8...Cathode structure, 9...
...Electron emission surface, 10...Insulating base. Note that the same reference numerals in the figures indicate the same or corresponding parts. Figure 1 Figure 4

Claims

[Scope of utility model registration request]

An electron gun for a cathode ray tube comprising a cup-shaped first grid electrode having an electron beam passage hole on the bottom surface for controlling the electron beam emitted from the electron emitting surface of the cathode structure, and a main electron lens section for focusing the electron beam. , the plate thickness of the first grid electrode facing the electron emitting surface of the cathode structure near the electron beam passing hole is determined by a dimension corresponding to the desired distance between the first grid electrode and the electron emitting surface of the cathode structure. An electron gun for a cathode ray tube, in which the surface of the insulating base constituting the cathode structure that is in pressure contact with the inner end surface of the first grid electrode and the electron emission surface are assembled on the same plane.