JPS6366831A - In-line type electron gun electrode structure - Google Patents

Abstract

PURPOSE:To maintain high assembling accuracy by making the electrode burial width of insulating support bars about twice as wide as the distance between electron guns and providing a recessed groove at the center in the longitudinal direction of one wide face side. CONSTITUTION:The electrode burial width (l) of two insulating support bars 36 supporting and fixing cathode structures 10A-10C and G1-G4 electrodes 11-14 of an in-line type electron gun structure 3 is made wider than the distance S between electron guns so as to satisfy the relationship (l)>2S. Therefore, the distance (l)1 between two pairs of electrode support pieces 13B integrally formed with the collar- shaped edge 13A of an enclosed cylinder G3 electrode 13 can be also widened to nearly 2S, the support of the electrode structure to the insulating support bars 36 is made firm, and the support at both outside opening sections is also stabilized. On the other hand, a recessed groove 36D is formed along the longitudinal direction at the center of the opposite face to the wide face buried with the electrode support pieces of the insulating support bars 36. Thereby, the cross section area of the insulating support bars 36 is made smaller than that when the recessed groove 36D is not provided, and its heat capacity is decreased. Accordingly, high assembling accuracy can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an in-line electron gun electrode assembly used in a color cathode ray tube.

[Conventional technology]

Recent color cathode ray tubes have Miki's cathode structure that generates individual electron beams, and a cathode assembly that is electrically and mechanically common, and each electronic beam path has an integral structure that forms a substantially individual or common electron lens. In-line type electron guns equipped with polarized electrodes are widely used. Figures 4 (a) and (b) show two electron beams generated in the same plane. A side view and an A-A' cross-sectional view of an electron gun electrode structure 1 that adopts a focusing method are shown. Cathode horizontal bar 10A, IO
B, 1QC (however, 1-510B is not shown),
Opposed to this is a G1 electrode 11, which is electrically common and has three electron beam transmission apertures arranged in-line, arranged 111 times in the electron beam traveling direction. G2 electrode 12. It is composed of a G3 electrode 13 and a G4 electrode 14, and each electrode supporter is embedded and fixed in two insulator support rods 16.
A predetermined electrode spacing is maintained. For example, in the case of the 03 electrode 13 having a closed cylindrical body (FIG. 4(b)), the electrode supporter is formed integrally with the brim 13A, and when it is embedded in the insulator support rod 16 at its tip, It is composed of four supports 13B provided with notches to increase the strength of the fusion bond.

The mutual positions of the constituent electrodes of the electron gun electrode crosspiece 1 must be maintained with high accuracy in order to maintain the characteristics of the electron gun, such as emission, focusing, and S-mode characteristics, to predetermined characteristics.Especially for applications where various types of information are displayed in high density. In recent color cathode ray tubes used in Distance c between the electrode supporter 13B and the insulator support rod
! 1 and, therefore, the buried width e2 of the insulator support rod 16 to ensure the support of each electrode. In the electron gun electrode crosspiece 2 shown in FIG. 4, each electrode (those that are the same as in FIG.
In this structure, the G3 electrode, which is the main electron lens electrode, is embedded and supported independently in the insulator support rod 17 of the book.In order to improve the focusing characteristics, the distance S between the three electron guns is increased. When the hole diameters of the electrodes 13 and 14 are increased, the ampholytic cathode 10A, the IOC, and the ampholytic electron beam hole can be reliably supported. That is,
By setting the distance u t23 between the electrode supports 13B to be larger than taI of the electron gun electrode structure 1 shown in FIG. 4, it is possible to support the parts close to the holes on both sides.

[Problem that the invention seeks to solve]

However, in the electron gun electrode crosspiece 1, in order to increase the support strength of each electrode and ensure support accuracy, the electrode supports 1.3
Increase the embedding width of the insulator support rod 16 by increasing the B interval ll! ! 2, when the insulator support rod 16 is heated with a burner to soften it when assembling the electron gun electrode crosspiece, the heat capacity becomes extremely large, the time required for heating and softening becomes longer than before, and the assembly work time is reduced. It becomes uneconomical as it increases the heat and wastes the burner heating energy. Alternatively, because the embedding width 12 is large, the softening of the insulator support rod 16 becomes uneven, and when the electrode support returns to room temperature after being buried and fixed therein, distortion remains in the insulator support rod 16, resulting in an accident of cracking. Sometimes.

On the other hand, in the electron gun electrode structure 2, four insulator support rods 17
However, it is difficult to bury each electrode supporter in a well-balanced manner, causing twisting of the electrode structure, and the three holes in the electrode are deviated from the same plane, resulting in the electrode support strength of the electron gun electrode crosspiece being reduced. However, the drawback is that the assembly accuracy is not improved.

In addition, the number of insulator support rods 17 increases to four, which is undesirable as it complicates the assembly work.

An object of the present invention is to eliminate the above-mentioned drawbacks and provide an in-line electron gun electrode assembly equipped with an insulator support rod that can maintain high assembly accuracy of an in-line electron gun electrode assembly equipped with an integrated electrode. It is to be.

[Means for solving problems]

In an in-line electron gun electrode structure in which a plurality of integrated electrodes are supported and fixed by two insulator support rods, the electrode embedding width in a direction perpendicular to the longitudinal direction of the insulator support rods is set between the electron guns. It is characterized by being widened to about twice the distance and provided with a concave groove in the longitudinal center of at least one wide side. With this configuration, even if the electrode embedding width of the insulator support rod is increased to increase the support strength for the electrode structure, the cross-sectional area can be reduced, so the heat capacity of the insulator support rod can be kept small, and the electron gun electrode High assembly accuracy of the structure can be maintained.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIGS. 1(a) and 1(b) are a side view and an AA' cross-sectional view of an electron gun electrode crosspiece 3 according to an embodiment of the present invention;
The figure shows a perspective view of the insulator support rod used in this. Cathode assembly 10A, I of in-line electron gun electrode assembly 3
OB, IOC and G1 electrodes 11. G2 electrode 12. The electrode embedding width e of the two insulator support rods 36 that support and fix the G3 electrode 13° and the G4 electrode 14 is e> with respect to the distance S between the electron guns.
It is wide enough to satisfy the 2S relationship. Therefore,
For example, the interval between two sets of electrode supports 13B integrally formed on the brim-shaped edge 13A of the closed cylinder G3 electrode 13! 1 can be expanded to nearly 28, the support of the electrode structure to the insulator support rod 36 becomes strong, and the support in the opening on the farmer's side is also stable.

On the other hand, a concave groove 3 is formed along the longitudinal direction in the center of the surface of the insulator support rod 36 opposite to the wide surface in which the electrode supporter is embedded.
6D is formed. Therefore, the cross-sectional area of the insulator support rod 36 becomes smaller than in the case without the concave groove 36D, and its heat capacity also becomes smaller.

Therefore, when the insulator support rod 36 is heated and softened with a burner when assembling the electron gun electrode structure, the time required for heating and softening is shortened, no energy is wasted, and the electrode is easily and uniformly softened. Even if the support members of the group are embedded and hardened by returning to room temperature, no distortion will remain in the insulator support rod 36, and cracking can be prevented.

FIG. 3 is an axial cross-sectional view of an electron gun electrode assembly 4 showing another embodiment of the present invention.The insulator support rod 46 has a concave shape along its longitudinal direction in the center of both wide surfaces. 7446D
The structure is similar to that of the embodiment shown in FIG. 1 except that 1.46 D2 is formed.

In this case, the cross-sectional area of the insulator support rod 46 can be made smaller than that of the embodiment shown in FIG. 1, and its heat capacity is reduced, making it possible to obtain even better effects. As a result, the embedded width of the insulator support rod can be widened as long as the space between it and the inner wall of the neck of the color cathode ray tube in which the electron gun electrode structure is sealed is allowed, and the electrode support by the electrode supporter can be made more secure. It becomes possible.

In the electron gun electrode structure having the above configuration, when the hole-perforation surface of the closed cylindrical body electrode is enlarged, for example, the neck diameter of the collar cathode ray tube in which the electron gun electrode structure is sealed is from φ29.1 mm to φ
This is particularly effective when enlarged to 36.5 mm.

In the above explanation, the main electron lens of the electron gun electrode structure is
Although the case where a potential focus method is adopted has been described, it goes without saying that the present invention is also applicable to other types of electrode crosspieces, such as a multi-stage focusing type.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to maintain high assembly precision of an in-line type electron gun electrode assembly equipped with an integrated electrode, and an insulator support rod is used that does not impair the economic efficiency of the assembly work. It becomes possible to easily obtain an in-line type electron gun electrode structure equipped with the following.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are a side view, an A-A' cross-sectional view, and a second
The figure is a perspective view of the insulator support rod used in this, the third
The figures are sectional views corresponding to FIG. 1(b), FIG. 4(a), (b), and FIG. 5(a), (b) showing other embodiments of the present invention.
2A and 2B are side views of conventionally used electron gun electrode structures. It is an AA' cross-sectional view. 1.2, 3.4... In-line electron gun electrode structure, I
OA, IOB, IOC...Cathode structure, 11...G1
Electrode, 12...G2 electrode, 13...G3 electrode, 14
... G4 electrode, 13A ... closed cylindrical body electrode brim-shaped edge,
13B... Electrode supporter, 16.17.36°46...
・Insulator support rod, 36D, 46D+, 46D2...
Concave groove. \, 11. - (Anzu) Cow! Face! , 3 times 詑咎i blasphemy (a) (cL)<
6) (g) Beef 40
Shadow S concave

Claims (1)

[Claims] In an in-line electron gun electrode structure in which a plurality of integrated electrodes are supported and fixed by two insulator support rods, the electrode embedding width of the insulator support rods is widened to about twice the distance between the electron guns, An in-line electron gun electrode assembly characterized in that a concave groove is provided in the longitudinal center of at least one wide side.