JPS60163340A - Electron gun - Google Patents

Abstract

PURPOSE:To improve the efficiency of assembly by forming a bulb spacer contact, which is to hold an electron gun structure in the bulb, with a circular arc- shaped stationary section installed around an electrode and a flat section which is extending from both ends of the stationary section and has a contact area. CONSTITUTION:A bulb spacer contact 8, which is to hold an electron gun structure in the bulb, is formed as one body with a stationary section 8a formed like a circular arc around G5 electrode 4, flat sections 8b extending from both ends of this stationary section 8a in the axial direction of the electron gun structure, and bulb contact elements 8c, each formed like a circular arc at each end of the flat section 8a. The stationary section 8a is welded to the side of G5 electrode 4 at a welding point 9. Therefore, if only one single part is used in assembling, a welding time can be sharply shortened and also the contact strength can be uniformed with accurate positioning; thus the holding accuracy of an electron gun structure can be improved.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an electron gun ζ in which a valve spacer contact for holding an electron gun assembly within a bulb is fixed to an electrode of the electron gun assembly.
This invention relates in particular to the structure of valve spacer contacts.

[Background of the invention]

Generally, electron guns use valve spacer contacts to mechanically hold the electron gun assembly within the valve.

FIG. 1 shows the main parts of a conventional electron gun. Each electrode 1 to 4 arranged in a row at a predetermined interval has a support part 1a to 4a (la is not shown), respectively. It is fused and fixedly supported by a plurality of insulating glasses 5 via the insulating glass. Furthermore, at least two valve spacer contacts 6 are fixed to electrodes G and 4c of the electrodes 1 to 4. The valve spacer contact 6 has a flat part 6af and a raised part 6b formed therein, and this raised part 6b is fixed by welding to a welding point 7 shown by G and an X mark to the seventh rung part 4a of the electrode 4. , flat part 6
Arc-shaped valve contact portions 6C are formed at both ends of a to press against the inner wall of the valve ζ.

However, in the above-mentioned conventional valve spacer contact 6, the welding position between the cut and raised portion 6b and the seventh rung portion 4a tends to vary, and it is likely to be installed tilted back and forth and left and right with respect to the fine details of the electron gun structure. . As a result, workability is extremely poor, and the strength of the spring with which the valve spacer contact 6 presses against the valve varies depending on the position and inclination of the valve spacer contact 6.

By the way, the required accuracy for the position of the valve spacer contact 6 is ±1 in the axial direction of the electron gun body.
The direction perpendicular to the axis l is ±0.2 m+i.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electron gun that is easy to assemble and has less variation in valve spacer contact strength.

[Summary of the invention]

To achieve the above object, the present invention provides an electron gun in which a valve spacer contact for holding an electron gun assembly in a bulb is fixed to an electrode of the electron gun assembly, wherein the valve spacer contact is arranged in a circle along the outer periphery of the electrode. A fixed part formed in an arc shape, a flat part extending in the axial direction of the electron gun assembly from both ends of this fixed part, and a valve contact part formed in an arc shape at the end of this flat part. The fixing part is fixed to the electrode.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 2 and 3. FIG. 2 is a front view of essential parts showing an embodiment of the electron gun according to the present invention, and FIG. 3 shows the valve spacer contact of FIG. 2, (al is a front view, (bl is a side view, (C) 1 is a plan view. Note that the same members as in FIG.

The valve spacer contact 8 includes a fixing portion 8a formed in an arc shape along the outer periphery of the electrode 4, and a fixing portion 8a.
It consists of a flat portion 8b extending in the axial direction of the electron gun assembly from both ends of the electron gun assembly, a valve contact portion 8c formed in an arc shape at the end of the flat portion 8b, and a force S, which are integrally molded. . Then, attach the fixing part 8a to G, and weld the welding point 9 to the side surface of the electrode 4.
It is fixed by welding.

In this way, the work is completed by welding and fixing one valve spacer contact 8, so the welding work time is reduced to % compared to the conventional case where two valve spacer contacts 8 are used. Further, since the valve spacer contact 8 is positioned simply by pressing the fixing portion 8a against the outer periphery of the electrode 4, positioning the valve spacer contact 8 is very easy. As mentioned above, the required precision for mounting the valve spacer contact 8 with respect to the position ζ is strictly perpendicular to the axis and direction of the electron gun assembly, but the left and right flat parts 8b are fixed parts 8a. Since the position is determined by simply pressing the fixed part 8a against the outer circumference of the electrode 4, the variation in position in the direction perpendicular to the axis ζ is only due to the tolerance of the parts.
The variation in the spring strength of the valve spacer contact 8 can be reduced to W or less, which is less than the conventional W.

〔Effect of the invention〕

As explained above, according to the present invention, the valve spacer contact includes a fixing part formed in an arc shape along the outer periphery of the electrode, and an electron gun assembly from both ends of the fixing part. It consists of a flat part extending in the axial direction, a valve contact part formed in an arc shape at the end of this flat part, and the fixing part is fixed to the electrode, so the assembly process is easy. An electron gun with good properties and less variation in valve spacer contact strength can be obtained.

[Brief explanation of the drawing]

Figure 1 shows the main parts of a conventional electron gun, fa) is a front view,
(b) is a side view, FIG. 2 is a front view of essential parts showing an embodiment of the electron gun according to the present invention, FIG. 3'' shows the valve spacer contact of FIG. 2, Cal is a front view, fb) is a side view, (cl is a plan view. 4...G, electrode, 8...valve spacer contact, 8a...fixing part, 8b...flat part, 8c...
Valve contact area.

Claims (1)

[Claims] In an electron gun in which a valve spacer contact for holding the electron gun assembly in the bulb is fixed to an electrode of the electron gun assembly, the valve spacer contact includes a fixing part formed in an arc shape along the outer circumference ζ of the electrode, and a fixing part shaped like an arc along the outer circumference ζ of the electrode. It consists of a flat part extending in the axial direction of the electron gun assembly from both ends of the fixed part, and a valve contact part formed in an arc shape at the end of this flat part. An electron gun characterized by being fixed to an electrode.