JPH0721948A - Cathode ray tube - Google Patents

Abstract

(57) [Summary] [Object] To prevent permanent deformation of the getter support in the step of inserting the electron gun assembly having the funnel getter assembly into the funnel. [Structure] Cup 8 of electron gun assembly 4 of getter support 5
A getter support 5 having a reinforcing portion 9 extending in the longitudinal direction is formed at the end portion on the side fixed to the getter support 5.
The portion of 8 was welded to the cup 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a funnel getter assembly provided on a cathode ray tube to an electron gun assembly.

[0002]

2. Description of the Related Art FIG. 6 is a vertical cross-sectional view showing the structure of a conventional funnel getter assembly for a color cathode ray tube. A funnel getter assembly 7 composed of an elastic getter support 5 and a getter container 6 is fixed by welding to the tip of the electron gun assembly 4 arranged in.
The getter container 6 is held in pressure contact with the inner wall of the funnel 2 by the elastic force of the getter support body 5, and after the cathode ray tube is evacuated, the getter container 6 is heated by high-frequency heating to evaporate the getter material, and the getter container 6 The inner surface and the inner surface of the funnel 2 are vapor-deposited to maintain the degree of vacuum in the tube. The getter container 6 is held at the position before the getter evaporation by the getter support 5 even after the getter material evaporation.

By the way, the funnel getter assembly 7
The getter support 5 has one end fixed to the electron gun assembly 4, and the bottom of the getter container 6 attached to the tip is pressed against the inner wall of the funnel 2 by the elastic force of the getter support 5. Part of body 5 is funnel 2
If it comes into contact with the inner wall of the tube or if it is deformed in the tube axis direction, various problems will occur. In particular, when it is deformed in the tube axis direction, the trajectory of the electron beam emitted from the electron gun assembly 4 is blocked, a shadow is generated on the screen, and a part of the image may be lost.

The phenomenon that the getter support 5 is deformed in the tube axis direction is caused by the getter support 5 during the manufacturing process of the cathode ray tube.
Is inserted into the tube of the neck 3, the getter support 5 is bent in the axial direction of the tube and inserted into the neck 3. At this time, the elastic force of the getter support 5 is concentrated on the fixed end of the electron gun assembly 4. As a result, the getter support 5 is permanently deformed by bending in the tube axis direction.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the getter support will not be permanently deformed when the electron gun assembly is inserted into the neck. Moreover, it is an object of the present invention to provide a funnel getter assembly mounting structure capable of reliably holding a getter container on the inner wall of the funnel with a constant pressure contact force.

[0006]

In the mounting structure of the getter assembly according to the present invention, a reinforcing portion is provided in the longitudinal direction of the side edge portion on one end side of the getter support body that is welded and fixed to the electron gun assembly.

[0007]

According to the present invention, since the reinforcing portion is formed in the portion of the getter support that is fixed to the electron gun assembly, the getter support is permanently deformed depending on the handling when inserting the electron gun assembly into the neck of the funnel. Does not occur.

[0008]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is an enlarged cross-sectional view of a main part of a color cathode ray tube according to a first embodiment of the present invention. A getter support 5 having a reinforcing portion 9 formed inside a cup 8 provided at the tip of an electron gun assembly 4. Is welded and fixed.

FIG. 2 is an enlarged view of the mounting portion of the cup and the getter support of the first embodiment, and FIG. 3 is a sectional view taken along the line III-III in FIG. 2, where the reinforcing portions 9 are on both sides of the getter support 5. The edge portions are formed by reinforcing portions 9a and 9b formed by press working, and the reinforcing portions 9a and 9b are formed over a range longer than a portion overlapping with the cup 8 and have a welding point 10
It is welded and fixed to the side surface of the cup 8 at a and 10b.

In the electron gun assembly 4 to which the funnel getter assembly 7 having the above-described structure is attached, even if the getter support 5 is bent in the tube axis direction and inserted into the neck 3,
Since the reinforcing portion 9 is formed at the end fixed to the cup 8, the getter support body 5 is not permanently deformed in the tube axis direction.

Further, the getter container 6 is held by the getter support 5 on the inner wall of the funnel 2 with a constant pressure contact force, so that the getter container 6 is vibrated or shocked.
Does not move.

By the way, the reason why the reinforcing portions 9a and 9b are provided on both side edges of the getter support 5 in the first embodiment is that the getter support 5 is welded and fixed to the cup 8 of the electron gun assembly 4. This is because it is possible to weld an arbitrary position in the vicinity of the plate width center line of the support body 5, and this also has the effect of improving the welding fixation accuracy of the funnel getter assembly.

Example 2. In Example 1, the getter support has curved reinforcing portions on both side edges, but as shown in FIG. 4, the reinforcing portions 9 are formed by cutting and raising both side edges.
May be formed.

Example 3. FIG. 5 is an enlarged cross-sectional view of the essential parts of Embodiment 3 of the present invention, in which the getter support 5 is provided with a reinforcing portion 9 on one side edge, and the strength of the reinforcing portion 9 can be adjusted. It will be easy.

In each of the above-mentioned embodiments, the getter support 5 is welded and fixed to the inside of the cup 8, but the reinforcing portion 9 is formed in the opposite direction to form the cup 8.
The same effect as in the above embodiment can be obtained even if the structure is fixed by welding to the outside of the.

[0016]

As described above, according to the present invention, since the reinforcing portion is provided at the end portion of the getter support fixed to the electron gun assembly, the getter support is mounted in the tube axial direction during assembly of the color cathode ray tube. Even if the getter support is flexed and inserted into the neck, the getter support can be prevented from being deformed in the tube axis direction.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view showing a portion in which a funnel getter assembly for a cathode ray tube according to a first embodiment of the present invention is attached to an electron gun assembly.

FIG. 2 is an enlarged cross-sectional view of a main part of the first embodiment.

FIG. 3 is a sectional view taken along line III-III of FIG. 2 of the first embodiment.

FIG. 4 is a partially enlarged sectional view of Embodiment 2 of the present invention.

FIG. 5 is a partially enlarged sectional view of a third embodiment of the present invention.

FIG. 6 is a vertical sectional view of a conventional color cathode ray tube.

[Explanation of symbols]

 2 funnel 3 neck 4 electron gun structure 5 getter support 6 getter container 7 funnel getter assembly 8 cup 9 reinforcement

Claims (3)

[Claims] 1. A cathode ray tube comprising a funnel getter assembly in which one end of a getter support formed of an elastic member is fixed to an electron gun structure and the other end is fixed to a getter container. A cathode ray tube characterized in that a reinforcing portion for enhancing bending strength is formed at an end portion attached to a gun structure. 2. The reinforcing portion formed at the end of the getter support attached to the electron gun assembly is bent or raised at least on one side edge of the getter support over a predetermined range in the longitudinal direction. The cathode ray tube according to claim 1, which is formed by: 3. The reinforcing portion formed at the mounting end of the getter support to the electron gun assembly is longer than the portion where at least one of both side edges of the getter support is longitudinally overlapped with the electron gun assembly. The cathode ray tube according to claim 1, wherein the cathode ray tube is formed by bending and raising over a range.