JPH0117807Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an electron gun assembly, and in particular to a method for connecting two or more electrodes to which the same voltage is applied among a plurality of electrodes constituting the electron gun assembly. This relates to the shape of the connecting line.

[Technical background of the invention]

One of the electron gun structures installed in a color cathode ray tube has a structure as shown in FIG.

That is, the electron gun assembly 1 includes a cathode 2 incorporating a heater (not shown), a first grid 3, a second grid 4, a third grid 5, a fourth grid 6, and two electrode elements disposed opposite to the cathode 2. It consists of a fifth grid 7 and a sixth grid 8 consisting of 7a and 7b, and a bead glass rod 9 that fixes each electrode at a predetermined interval through the implanted part of each electrode. 5 grid 7 is connection line 1
The second grid ₄ and the fourth grid ₆ are connected by another connection line (not shown), and the third grid 5, the _fourth grid 6, and the fifth grid 7 A unipotential type auxiliary lens is formed by the fifth grid 7.
and the sixth grid 8 form a bipotential main lens.

As shown in FIGS. 2 and 3, the connecting wire 10 of the electron gun assembly 1 is usually formed by bending a conductive member having a substantially circular cross section, taking into account the potential difference with the fourth grid 4. 5 and the vicinity of the contact portions 11 and 12 with the fifth grid 7 are pressed into a plate shape to improve the formability during forming, and also to improve workability such as resistance welding in the welding portions 5 ₁ , 7a ₁ , and 7b ₁ . It's also starting to get better.

However, a 0.5 mmφ conductive member is used as the base material, and the areas near the contact portions 11 and 12 are pressed into a plate shape with a thickness of 0.25 mm, and then the electron gun assembly 1 is formed.
used for the connection wire 10 of the welded parts 5 ₁ , 7a ₁ , 7b ₁
When resistance welding is performed with a thickness of 0.25 mm, the welding becomes unstable due to the thickness and splashes and electroweakness occur. As a countermeasure to this problem, if the conductive member having a diameter of 0.5 mm is made 0.1 mm near the contact portions 11 and 12 in order to stabilize welding, it becomes easy to break during molding, and there is also the problem that it is not suitable for mass production.

[Purpose of invention]

The present invention was developed in view of the problems mentioned above, and it prevents cutting during forming, eliminates splash and electrical weakness during welding due to resistance, etc.
It is an object of the present invention to provide an electron gun assembly having a connection line capable of obtaining welding stability.

[Summary of the idea]

That is, the present invention includes a plurality of electrodes fixed to a bead glass rod via an implanted part at a predetermined interval, and a gap between two or more of the electrodes to which the same voltage is applied. In an electron gun assembly, the connection wire has a plate-like part near the contact part with two or more electrodes, and a ribbon-like part near the weld part with the two or more electrodes. It is characterized by being made of a conductive member having a predetermined shape, with the other part being a round part, and the round part being a round part.
The diameter of the plate is 0.5 mm, the thickness of the plate portion is 0.25 mm, and the thickness of the ribbon portion is approximately 0.20 mm.

[Example of idea]

Next, one embodiment of the present invention will be described with reference to FIGS. 4 to 6. The electron gun structure has almost the same structure as that shown in FIG.

That is, the electron gun assembly 21 includes a cathode 22 that includes a heater (not shown), a first grid 23, a second grid 24, a third grid 25, a fourth grid 26, and two electrode elements arranged opposite to the cathode 22. 2
It consists of a fifth grid 27 and a sixth grid 28 consisting of 7a and 27b, and a bead glass rod 29 that fixes each electrode at a predetermined interval through the implanted part of each electrode. 5 grid 27 connects the welded portion 25 with the connecting wire 30.
₁ , 27a ₁ , and 27b ₁ , and the second grid 24 and fourth grid 26 are connected by other connection lines (not shown), and the third grid 25, fourth grid 26, and fifth grid 7 form a unipotential type. In addition to forming an auxiliary lens, the fifth grid 27 and the sixth grid 28 form a bipotential main lens.

The connection wires of this electron gun assembly 21 are shown in FIGS. 5 and 6.
As shown in the figure, considering the potential difference with the fourth grid 24, a round conductive member with an almost circular cross section is used to press the areas 31 and 32 near the contact points with the third grid 25 and the fifth grid 27 into a plate shape. The processing is the same as in the case of FIGS. 2 and 3, but in the example, of the areas 31 and 32 near the contact areas, the areas 33 and 34 near the welding areas are pressed into a ribbon shape that is thinner than the plate shape. After processing, it is molded to improve moldability during molding.
This facilitates fixing work such as resistance welding at the welded portions 25 ₁ , 27a ₁ , 27b ₁ .

That is, for example, using a conductive member with a diameter of 0.5 mm as the base material, a two-step press process is performed in which the contact portions 31 and 32 are made into plate-shaped portions with a thickness of 0.25 mm, and the weld portions 33 and 34 are made into plate-shaped portions with a thickness of 0.20 mm. 0.5mmφ
There is very little work hardening at the boundary that occurs when the thickness is reduced to 0.25 mm or less in one step, and since the welding areas 33 and 34 are on almost the same plane as the contact areas 31 and 32, it is difficult to form them in the subsequent process. No breakage occurs during the process, and by forming the ribbon into a ribbon shape, splash and electrical weakness are reduced even during fixing work such as resistance welding at the welded parts 25 ₁ , 27a ₁ , 27b ₁ , resulting in a good connection. As a result, we were able to obtain an electron gun structure of extremely high quality.

[Effect of idea]

As described above, according to the present invention, two of the plurality of electrodes constituting the electron gun structure are to which the same voltage is applied.
When connecting two or more electrodes with a connecting wire, a two-step press is performed on the plate-shaped part and the ribbon-shaped part, and by welding the ribbon-shaped part, a stable welded connection without breakage is possible. Therefore, its industrial value is great.

[Brief explanation of drawings]

Figures 1 to 3 are diagrams showing an example of a current electron gun assembly, with Figure 1 being a side view, Figure 2 being an enlarged view of the main parts of Figure 1, and Figure 3 being a perspective view of connection lines. , FIGS. 4 to 6 are diagrams showing one embodiment of the electron gun assembly of the present invention, in which FIG. 4 is a side view, FIG. 5 is an enlarged view of the main part of FIG. 4, and FIG. 6 is a connection diagram. It is a perspective view of a line. 1, 21...electron gun structure, 5 ₁ , 7a ₁ , 7b ₁ ,
25 ₁ , 27a ₁ , 27b ₁ ...Welded part, 10, 30
...connection line, 11, 12, 31, 32...near the contact part, 33, 34...near the welding part.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of electrodes fixed to a bead glass rod through an implanted portion at predetermined intervals, and to which the same voltage is applied among the plurality of electrodes. An electron gun assembly comprising at least a connecting line connecting two or more electrodes, wherein the connecting line forms a plate-shaped portion near a contact portion with the two or more electrodes, and the connecting line connects between the two or more electrodes. 1. An electron gun assembly comprising a conductive member having a predetermined shape, the conductive member having a ribbon-like part near the welded part and a round part at the other part. (2) The round part is approximately 0.5mmφ, the plate part is approximately 0.25mm thick,
The electron gun assembly according to claim 1, wherein the ribbon-shaped portion has a thickness of about 0.20 mm.