JPS59105237A - Manufacture of electron gun - Google Patents

Abstract

PURPOSE:To perform easily sort discrimination while forming with a good yield by stamping bead glasses when assembling an electron gun to be sealed in the neck part and fixing constituent members like an electrode or the like to the bead glasses as prescribed. CONSTITUTION:Members 2 like an electrode or the like are inserted into an assembly jig, this is arranged on an assembly device 3, the bead glasses 32 are mounted inside of the V blocks 31 and after these are heated up to a prescribed temperature, the V blocks are moved toward the assembly jig 1 in the arrow direction and the members 2 like the electrode or the like are fixed while their end parts are burried in the bead glasses 32. Next, the stamps 34 and 35 are made on the bead glass surfaces from outside through the through hole 33, by using, for instance, a metal rod. Said bead glass surfaces to be stamped are located on the opposite surfaces to the surfaces wherein the electrode or the like are burried. Thereby, working efficiency can be improved thus being able to form with a good yield and to perform sort discrimination easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for manufacturing an electron gun sealed in the neck of a cathode ray tube, and in particular to an improved bead glass for fixing constituent members during assembly of the electron gun. The purpose is to provide a new embedding method.

[Technical background of the invention]

The assembly method for manufacturing the electron G sealed in the conventional cathode ray tube is carried out in a conventional manner.

That is, as shown in FIG. 1, a predetermined electrode (2) and the like are inserted into an assembly jig (1) and placed on an assembly device (3). In this device, bevel stands (4) are arranged on the left and right to face each other, and bead glasses (5) are attached to the inner surfaces of the bevel stands (4) facing the assembly jig. .

After arranging the electron gun in this manner, the bead glass is heated to a predetermined temperature, and the bevel tables (4) are moved in the directions shown by the arrows in the figure to embed the ends of the members constituting the electron gun in the bead glass. , each member is fixed to form an electron gun. At this time, spacers are inserted in advance between each part so as to maintain a predetermined interval, and these spacers are removed after being embedded in the bead glass. FIG. 2 shows a partially sectional view of the state formed in this manner.

Qka, 4, (c), (goods) are electrodes, and (c)9 is support.

[Problems with background technology]

The electron gun is formed as shown in Figure 2.
Electrode tzB embedded in bead glass (23.

In (c), C24), the end of the bead glass (5) is usually embedded long in the cross-sectional area as shown in Figure 3;
Support (c), (2G) are opposite bead glass (5
), the end portion is usually embedded long in the cross section as shown in Fig. 3. Since it is fixed in this way, the strain on the bead glass is reduced to the electrode Qυ, (23, (2
3) The strain in the longitudinal direction of the bead glass near the embedded end of (24) is the tension strain (at becomes large,
Horizontal cracks are likely to occur, while support (A), C6)
The strain in the longitudinal direction of the bead glass near where the end of the bead is embedded is compression strain (longitudinal cracks are likely to occur when the bl is large). In order to distinguish between electron guns, the bead glass is colored in various colors, such as yellow, to distinguish between them.

As mentioned above, if the bead glass is distorted, it may be damaged, resulting in defects and lower yields.Also, when bead glass is colored with many different types, different additives are mixed into the glass, so it is difficult to embed the bead glass. Appropriate heating conditions for bead glass during work differ depending on the color, resulting in poor work efficiency and the inability to set stable manufacturing conditions, which causes deterioration in precision.

[D-type of invention]

The present invention has been made in consideration of these points, and aims to provide a method for manufacturing an electron gun sealed in a cathode ray tube, which allows efficient work, high yield, and efficient product differentiation.

[Summary of the invention]

When assembling an electron gun sealed in the neck portion of a cathode ray tube, the present invention provides a process for fixing constituent members such as electrodes to nine-bead glass with a predetermined number of holes, by stamping the bead glass and forming it with a high yield. In addition, this is a manufacturing method of an electron gun that allows easy differentiation of types.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 4, the assembly device is such that an assembly jig (1) into which constituent members such as electrodes are inserted is placed on an assembly device (3), and the assembly jig (1) is placed on both sides of the jig (1) so as to face each other. A beveling stand 01) is installed at the bevel stand f31)! (d) The lower end portions are each attached to an assembly device (3) and are moved as shown by the arrows in the figure. This bevel stand (31) is formed so that a bead glass (32) is placed on the inner side (Ill) facing the assembly jig, and each bevel stand (31) has a plurality of through holes for marking. It is perforated.

The shape of these holes is such that when the pole etc. is embedded in bead glass, the longitudinal direction of the cross section of the hole is perpendicular to the longitudinal direction of the cross section of the embedded end. ing.

'When assembling the electron gun, proceed as follows.

First, insert members (2) such as electrodes into the assembly jig (1), place this on the assembly device (3), attach the bead glass C3 to the inside of the bevel table 01), and then After heating the bevel to a predetermined temperature, move the bevel stand Gυ toward the assembly jig (1) as shown by the arrow in the figure. Rarely fixed.

Next, an inscription is made on the bead glass surface from the outside through the through hole (c) using, for example, a metal rod.

The surface of the pea glass to be engraved is the surface opposite to the surface on which members such as electrodes are embedded and twisted. Its front view is shown in FIG. C44) and C35) in Figure 5 are stamps.

(21), (27J, (231,C) indicated by dotted lines
24), (25t, (2G+ is the end of a member such as an electrode embedded in the bead glass part on the opposite side.

By stamping the bead glass in this way, the tension strain that previously occurred due to the vertical stamping is alleviated, and the occurrence of horizontal cracks in the bead glass is prevented. The compression strain that had occurred was alleviated, and the occurrence of vertical cracks in the bead glass was prevented. If the shape, size, position, etc. of the engraving are appropriately selected and the engraving is carried out, the firing conditions of the bead glass will be different in the case of conventional classification by color, but in the case of the present invention, the firing conditions will always be constant. By simply heating the bead glass, it became possible to classify electron guns by type with high accuracy.

〔Effect of the invention〕

The present invention is a method for forming an imprint on a bead glass in which the end of a member such as an electrode is embedded when assembling an electron gun sealed in the neck of a cathode ray tube. The distortion that had been occurring can be prevented, and the firing conditions of the bead glass can be kept constant to allow for classification of electron gun types with good viscosity, making it possible to obtain electron guns with high yield and stable quality1. It stabilizes the quality of the sealed cathode ray tubes of these electron guns and is industrially useful.

[Brief explanation of the drawing]

Figure 1 is '..., a schematic explanation of the sub-gun assembly device, a clear diagram, and Figure 2.
The figure is a partially cross-sectional front view of an electron gun with electrodes etc. buried in the bead glass, Figure 3 is an explanatory diagram showing the bead glass with electrodes etc. buried and distortion, and Figure 4 is FIG. 5 is a schematic explanatory diagram of an electron gun assembly apparatus of the present invention, and is an explanatory diagram showing a bead glass in which members such as electrodes of the present invention are embedded. 1... Assembly jig, 3... Assembly device, 21, 22, 2
3.24...electrode, 25.26...support, 31
...Bevel stand, 32...Bead glass, 34.35
...A stamp formed on the bead glass, 33...One hole drilled in the Yagun stand. Agent Patent Attorney Mr. Inoue Figure 1 Figure 4

Claims (1)

[Claims] (1) When manufacturing an electron gun that is sealed in the neck of a cathode ray tube bulb, the parts that make up the electron gun are fixed to the bead glass at a predetermined distance. A manufacturing method of an electron gun characterized by the fact that the longitudinal direction of the cross section is located at right angles to the longitudinal direction of the cross section of the member end in the bead glass part on the opposite side of the bead glass part in which the end of the 21m secondary gun member is embedded. 2. The method of manufacturing an electron gun according to claim 1, wherein the electron gun is engraved in a shape.