JP3128032B2 - Electron gun for cathode ray tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electron gun for a cathode ray tube, and more particularly to a mounting structure thereof.

[0002]

2. Description of the Related Art FIG. 6 is a sectional view showing a general electron gun for a cathode ray tube, wherein 6 is an electron gun assembly, 2 is a shield cup located at the tip of the electron gun assembly 6, and 1 is provided on the shield cup 2. Reference numeral 4 denotes a stem glass, 5 denotes a lead wire, and 3 denotes a neck tube that houses the electron gun assembly 6 and the like.

The shield cup 2 and the contactor 1 are configured as shown in FIG. That is, the contactor 1
Is made of a strip-shaped spring material shown in FIG. 8, and is welded around the tip of the shield cup 2 at equal intervals. The distal end of each contactor 1 is slightly curved inward to facilitate insertion of the electron gun assembly into the neck tube 3 and to make proper contact with the neck tube 3.

The electron gun assembly 6 is fixed in the neck tube 3 at one end by a lead wire 5 embedded in a stem glass 4, and the other end is supported by a contactor 1 welded to a shield cup 2. 1 is pressed against the inner surface of the neck tube 3 by its spring pressure, so that the neck tube 3
It is made to be located in the center of. Further, the contactor 1 has an effect of preventing the electron gun assembly 6 from being eccentric from the center of the neck tube 3 when an impact is applied to the cathode ray tube in an actual use state. Therefore, as the number of the contactors 1 increases, the supporting action becomes stronger.

[0005]

By the way, when the electron gun assembly 6 and the like are inserted into the neck tube 3 in the process of manufacturing the cathode ray tube,
The contactor 1 is deformed inward in accordance with the inner diameter of the neck tube 3. At this time, in order to avoid contact between the distal ends of the contactors 1, the contactors 1 are spaced apart from each other by a certain distance in the horizontal direction. There has been a problem that the number of contactors must be arranged and only a smaller number of contactors are provided than the desired number of contactors.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it has become possible to arrange more contactors around a shield cup, and as a result, the electron gun is caused to have a neck tube by an impact. To prevent eccentricity from the center.

In the electron gun for a cathode ray tube according to the present invention, one end is fixed by a lead wire sealed to a stem glass, and a base is fixed without any space around a shield cup provided at the other end. and the tip portion of the plurality of contactors Te configured electron gun smell for a cathode ray tube to support the other end pressed against the neck tube of the cathode ray tube, the adjacent Conta
Detector is displaced in the axial direction of the electron gun and fixed to the shield cup
It was done.

[0008]

[0009]

The contactor according to the present invention does not intersect with the adjacent contactor when the electron gun is inserted into the neck tube, even if the contactor is arranged around the shield cup without or with a small space therebetween. .

[0010]

【Example】

Embodiment 1 FIG. FIG. 1 is a side view showing a shield cup and a contactor portion of an electron gun according to one embodiment of the present invention.
In the figure, reference numeral 2 denotes a shield cup, and reference numeral 1 denotes a contactor welded around the distal end of the shield cup 2 without or with a small interval. Contactor 1 is shown in FIG.
As shown in FIG. 1, the tip that is curved inward is narrowed in a substantially fan shape.

If the tip of the contactor 1 is tapered in this way, even when the contactor 1 is densely arranged around the shield cup 2, the contactor 1 is adjacent when the electron gun assembly 6 is inserted into the neck tube 3. There is no inconvenience that the tips of the contactors 1 come into contact with each other and get on each other and deform.
The arrangement of a large number of contactors makes it possible to stably support the electron gun structure. In addition, the shape of the distal end portion of the contactor 1 is not limited to a fan shape or a tapered shape, and may be any shape as long as it is narrower than the base portion. FIG. 3 is a sectional view showing a state in which the electron gun structure 6 is housed in the neck tube 3.

Embodiment 2 FIG. FIG. 4 shows another embodiment of the present invention. In this embodiment, a strip-shaped contactor 1 similar to the conventional one is used, and adjacent contactors 1 are alternately shifted in the axial direction of the electron gun. ) The shield cup 2 is welded around the tip of the shield cup 2 without or with a small gap. If the step is small, contact with an adjacent contactor occurs. If the step is large, the chance of crossing of the contactor tip decreases, but the axial length of the electron gun occupied by the contactor increases. Two
About 1.8 is desirable.

Embodiment 3 FIG. In the second embodiment, the adjacent contactors 1 are alternately shifted and welded to the shield cup 2, but the same effect can be obtained even if a step is formed as shown in FIG.

[0014]

As described above, according to the present invention, the distance
Without touching the tip of adjacent contactors
Weld to the shield cup by shifting it in the axial direction of the sub gun
Therefore , more contactors can be arranged around the shield cup using the same rectangular contactors as before, and the electron gun can be stably fixed to the neck tube.

[0015]

[Brief description of the drawings]

FIG. 1 is a side view showing a shield cup and a contactor according to Embodiment 1 of the present invention.

FIG. 2 is a plan view showing one of the contactors of the first embodiment.

FIG. 3 is a front sectional view showing a state in which the electron gun structure according to the first embodiment is inserted into a neck tube.

FIG. 4 is a side view showing a shield cup and a contactor according to Embodiment 2 of the present invention.

FIG. 5 is a side view showing a shield cup and a contactor according to Embodiment 3 of the present invention.

FIG. 6 is a side view showing a general electron gun structure for a cathode ray tube.

FIG. 7 is a side view showing a shield cup and a contactor of a conventional electron gun assembly.

FIG. 8 is a plan view showing one of the strip contactors.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contactor 2 Shield cup 3 Neck tube 4 Stem glass 5 Lead wire 6 Electron gun structure

Claims (1)

(57) [Claims] An end of a plurality of contactors, one end of which is fixed by a lead wire sealed to a stem glass and the bases of which are fixed without leaving a gap around a shield cup provided at the other end. in cathode-ray tube electron gun configured to support the other end pressed against the neck tube of the cathode ray tube, next
Ri suit cathode-ray tube electron gun tip portion of each contactor to be shifted in the axial direction of the electron gun, characterized in that fixed to the shield cup.