KR950003274Y1 - Bulb space structure for electron gun - Google Patents

Abstract

No content.

Description

Bulb spacer elastic compensation structure of electron gun

1 is a partial longitudinal sectional view showing an installation state of an electron gun having a plurality of bulb spacers in a CRT.

Figure 2 is a cross-sectional view showing the elastic compensation structure of the present invention.

3 is a cross-sectional view showing a conventional elastic compensation structure.

* Explanation of symbols for main parts of the drawings

2: convergence cup 3a, 3b, 3c: bulb spacer

4: neck part 6: getter supporter

7: inwardly facing surface

The present invention relates to the elastic compensation structure of the bulb spacer which is attached to the outer circumferential surface of the convergence cup of the electron gun in order to maintain the electron gun in the center of the neck tube neck in the electron gun of the CRT.

FIG. 1 illustrates the installation state of a typical electron gun 1 related to the present invention. The electron gun 1 is placed on the outer circumferential surface of the convergence cup 2 of the electron gun 1 at the center of the corresponding tube tube neck 4. A plurality of (e.g., three identical) bulb spacers 3a, 3b, and 3c which are positioned and supported and allow a positive voltage to be applied to related parts on the electron gun 1 in contact with the conductive film 5 on the inner surface of the tube. ) Are attached and installed.

Such bulb spacers are usually installed by attaching a plurality of identical bulb spacers 3a, 3b, 3c radially to the outer circumferential surface of the convergence cup 2 as shown in the example. In addition to these bulb spacers 3a, 3b, and 3c, a getter for installing and supporting a getter which serves to increase the vacuum in the tube by combining with residual air molecules in the tube when an initial voltage is applied to the CRT. The poster 6 may be attached to one side of the convergence cup 2 of the electron gun 1, in this case, the opposite side where the getter supporter 6 is installed due to the self-elasticity of the getter supporter 6. It is necessary to compensate for the additional elasticity acting.

In order to compensate for the deflection of the center of elasticity between the bulk spacers 3a, 3b and 3c due to the installation of the getter supporter 6, conventionally, as shown in FIG. 3, the bulk spacers on both sides of the getter supporter 6 are shown. (3b) and (3c) were welded to the position where the remaining bulb spacer 3a and the getter supporter 6 were moved by a predetermined angle (a) to a position where the force can be balanced. Since the angle adjustment between the mounting positions of 3a) (3b) and 3c is very difficult and error is likely to occur, it is not only to complicate the design and manufacture of the related electron gun but also to cause a high failure rate.

The present invention is devised to solve such a conventional problem, it will be described in detail based on the accompanying drawings as follows.

That is, the present invention attaches a plurality of, for example, three identical bulb spacers 3a, 3b, 3c and one getter supporter 6 to the outer circumferential surface of the convergence cup 2 as shown in FIG. In the case where one electron gun is installed in the CRT neck portion 4, the bulb spacers 3a, 3b and 3c are attached to the outer circumferential surface of the convergence cup 2 at equal intervals. It is by forming an inwardly projecting surface (7) to balance the power of.

The present invention as described above increases the elasticity of the bulb spacer (3a) in contact with the inwardly projecting surface (7) formed on one inner surface of the CRT neck portion (4) as described above, the additional elasticity by the getter supporter (6) This type of bulb spacers 3a, 3b, and 3c can be attached to the outer circumferential surface of the convergence cup 2 at equal intervals irrelevant to the failure of the getter supporter 6 by a structure capable of compensating for Not only can the design and manufacture of the electron gun be simplified, but also the effect of greatly reducing the incidence of defects is provided.

Claims (1)

On the outer circumferential surface of the convergence cup 2, a plurality of identical bulb spacers 3a, 3b, 3c and one getter supporter 6 are attached at predetermined intervals to an electron gun installed in the CRT neck 4; The bulb spacer elastic compensation of the electron gun is formed by forming an inwardly projecting surface 7 so as to cancel the elasticity of the getter supporter 6 at the contact area of the bulb spacer 3a in the neck semicircle opposite the getter supporter 6. rescue.