JPS5828162A - Electrode for electron gun and its manufacture - Google Patents

Abstract

PURPOSE:To enable the dimensional accuracy of each part of an electrode for an electron gun to be easily achieved by unifying a pair of cuplike parts, which are provided with electron beam passing holes, with a disk-like part which is provided with holes corresponding to the said beam passing holes and is interposed between the said cup-like parts. CONSTITUTION:An electrode for an electron gun is constituted by interposing a disk-like part 17, which has a larger outer diameter than parts 11 and 12 and is provided with holes 18 corresponding to beam passing holes 13 of the parts 11 and 12, between a pair of opposed cup-like parts 11 and 12 each having three electron beam passing holes 13 forming an electron lens. In constituting the above electrode, the part 12 is inserted into a jig 21 by engaging guide pins 24 in the holes 13 of the jig 21, the part 17 is positioned on the part 12, the part 11 is positioned on the part 17, and all these parts 12, 17 and 11 are unified together by welding their joint parts. By the means mentioned above, the mechanical strength of the electrode can be increased by increasing the thickness of the part 17, and the accuracy of each part can be easily enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrode for an electron gun configured as a color cathode ray tube and a method for assembling the same.

Generally, the pole for this allt gun consists of an electron lens,
It has three electron beam passage holes, and the dimensional accuracy of each part, including this part, has a great impact on the performance of the electron gun. Therefore, during manufacturing, the dimensions of each of the above parts must be maintained with high accuracy. Further, bead glass for support is fused to this electrode, and is supported and fixed in a predetermined positional relationship with other electrodes. For this reason, various conditions were required for its manufacture, such as the need for sufficiently high mechanical strength.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electrode for an electron gun that is easy to assemble, which allows for easy dimensional accuracy of each part, and sufficiently high mechanical strength for fusing bead glass, and a method for assembling the same.

The present invention also includes a pair of cup-shaped parts arranged opposite to each other in which three cylindrical electron beam passing holes of the same hole diameter are arranged in parallel at the same pitch, and 4 interposed between the pair of cup-shaped parts. A disk-shaped part having a predetermined outer diameter larger than the planar outer diameter thereof and having a hole larger than the outer diameter of the cylindrical part in a portion corresponding to the three electron beam passing holes, The present invention is an electron gun electrode characterized in that parts that are joined to each other are welded to be integrally formed, and a method for assembling the electron gun electrode using a dedicated assembly jig.

The details of the present invention will be explained below with reference to an embodiment shown in the drawings. Figure 1 (see Ql) 03 is a pair of cup-shaped parts arranged opposite each other, and in order to constitute an electron lens, <3 electron beam passing holes αy of the same hole diameter (μψ) forming a cylindrical shape are formed. They are arranged in parallel at the same pitch (e K.) These cup-shaped parts αυ (Lz are each provided with a joining flange part αea!19* on the outer periphery of the opposing part. Also, the above-mentioned cup-shaped part 01) Q3 is In production,
The pitch of each electron beam communication hole a3 and their hole diameter (A
ψ) and height 0 with high accuracy. αη is a disk-shaped part interposed between the pair of cup-shaped parts αυ (130), which is formed to have a predetermined outer shape larger than the planar outer shape of the cup-shaped parts aυ (12). In the part facing the electron beam passage hole (13, there is a hole a having a diameter larger than the outer diameter of the cylindrical part.
Provide a barrel for each. When manufacturing this disc-shaped part αη, its outer diameter dimensions, that is, the dimensions shown (8) and (
Create 0 accurately. The flatness (flatness) is also made with high precision.

The above-mentioned parts Q1) Q3 (17) are stacked as shown in Figure 2 under a predetermined dimensional relationship and are combined together to form an electrode for an electron gun.

Figure 3 is for each of the above parts a) α21 (Iη) as shown in figure 2.
This figure shows a jig (3) for assembling the parts, and will be explained below. In the figure, CD is a reference stand, and on its upper surface are a pair of L-shaped reference blocks (22pI: fixed. , t'- are arranged so as to maintain an interval approximately equal to the outer dimension 0 of the disc-shaped part α.

In addition, these standards - 'Lock (2) reference field (224)
to the dimension Qlj (D = B/2), 3
Plant a standard bottle (goods) of books. This reference bottle fits into the electron beam passage hole 03 of the cup-shaped part αυα2, and is arranged at the pitch [F]. In addition, on the part of the reference block (2) facing the base face (224), there is a pair of holes that open and close using a bottle (C) provided between the reference block (2 seconds and the reference base CHI) as a fulcrum. A door-shaped holding member (c) is provided.

Next, an assembly method using the above-mentioned jig will be explained.

First, place the cup-shaped part α2 in a state where the facing part with the flange part α9 faces upward, and place the cup-shaped part α2 through the electric potato beam passage hole α.
~ is fitted into the reference bin (2) of the jig (a) and positioned on the reference stand Ql) of the jig -. Next, open the J%-shaped presser member and place the disc-shaped part α on the opposing part of the cup-shaped part α2. When the wheel-shaped presser member is closed in this state, the dimension C portion of the disc-shaped part is inserted between the opposing surfaces (22tx) of the reference block (2), and the outer periphery continuous with the dimension 0 portion is the reference surface ( 22J) #C is joined. Therefore, the disk-shaped part Oη is the reference block (
2), it is positioned on the cup-shaped part αz.

Next, the electron beam passage hole (13) of the other cup-shaped part aυ is fitted into the reference bin q4 with the facing part provided with the flange α facing downward. Through this operation, the cup-shaped part αυ is positioned on the disc-shaped part.

In this way, each part aυ (121m?) is stacked in a predetermined dimensional relationship, and then the several parts where the VC is connected to each other (marked with X in the figure) are melted and strained to form an electrode. Configure. The above yakuchi is each /<-tsu (11) a
'a Laser welding is used to prevent deformation and splashing. Further, the number of welding points is four in total, two on each side, but any number of welding points may be used as long as it is three or more.

Supporting bead glass is fused to the electrodes assembled in this way and assembled into an electron gun, but the explanation thereof will be omitted here.

Here, the part of the above electrode where the bead glass is fused is a part of the disk-shaped part a7), but since the disk-shaped part fin is a flat member and does not require forming processing such as squeezing, the plate thickness is It is possible to increase the thickness and sufficiently increase the strength. On the other hand, since the bead glass is not welded to the cup-shaped part αυ0, special strength is not required.
Board thickness can be reduced. Therefore, it becomes easy to mold a complicated shape as shown in the figure. In addition, since the assembly to the bead glass is performed based on the external shape of the disk-shaped parts, the electron beam passage hole of each electrode can be freely positioned off-center. Furthermore, since the external shape of the electrode itself can be taken only by the disc-shaped diameter αη, accuracy can be easily achieved.

In the above example, three reference bottles (goods) were used as the assembly jig (end), but as shown in Figure 4, the number of reference bottles (goods) may be two. −・. Furthermore, as shown in Figure 5, only the reference bottle (2) that is inserted into the center hole of the three electron beam passage holes α has a circular shape that slides in close contact with the electron beam passage hole α. The reference bottle (24,) formed in a cross section and inserted into the side hole may be in the form of a shaft so as to come into contact with a part of the inner surface of the electron beam passage hole αJ. In this case, positioning of the cup-shaped part at+α is done by fitting the electron beam passage hole α with the reference pin 124 (24a), and then using the positioning pin (to) to position the cup-shaped part 0υα.
2, the inner surface of the electron beam passage hole 031 is the reference bin (2
4a) Press until VC contacts. Note that the positioning of the disk-shaped part a force is the same as in the previous embodiment,
Explanation will be omitted.

As described above, according to the present invention, it is easy to obtain high dimensional accuracy of each part, and it is possible to obtain an electrode that is strong enough to withstand the fusion of peed glass. You can get quality products. In addition, the assembly method is easy, using a special jig.
Easy assembly work

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of the electrode for an electron gun according to the present invention, with each part disassembled. Figure 2 is a perspective view showing the parts shown in Figure 1 assembled. The figures are a perspective view 1 showing a jig used in an embodiment of the assembly method according to the present invention;
Figures 1-4 are perspective views showing a jig used in another embodiment of the present invention, and Figure 5 is a partial plan view showing the relationship between the jig and parts in another embodiment of the present invention. αυα2...Cup-shaped part, α3@-Electron beam passage hole, Q4) (11--Joining flange, αη...Disc-shaped part, (11--Hole, ■...Jig, @...Reference block, (2) (24,)...Reference bin.

Claims (2)

[Claims] (1) A pair of cup-shaped parts arranged facing each other in which three cylindrical electron beam passing holes with the same diameter are arranged in parallel at the same pitch, and the planar outline of the cup-shaped parts interposed between the pair of cup-shaped parts. A disk-shaped part having a larger predetermined outer shape and having a hole larger than the outer diameter of the cylindrical part in a portion corresponding to the three electron beam passing holes,
An electrode for an electron gun characterized by the fact that the above-mentioned parts are integrally formed by welding the parts that join each other. (2) A pair of cup-shaped parts arranged facing each other in which three cylindrical electron beam passing holes with the same hole diameter are arranged in parallel at the same pitch, and a pair of cup-shaped parts interposed between these pair of cup-shaped parts, and An electrode for an electron gun, which is composed of a disk-shaped part having a large predetermined external shape and having a hole larger than the outer diameter of the cylindrical part in a portion corresponding to the three electron beam passing holes, is attached to the cup. at least two reference bins arranged at the pitch to fit into the electron beam passage holes of the disc-shaped part; and at least two reference bins arranged in a predetermined positional relationship with the reference bins and joined to the outer periphery of the disc-shaped part. Using a jig with a reference block for positioning, one of the cup-shaped parts is positioned by fitting the electron beam passage hole into the reference bottle, and then the disk-shaped parts are stacked and the outer periphery is The other cup-shaped part is placed on top of the other cup-shaped part, and its electron beam passing hole is fitted into the reference bottle for positioning.The parts to be joined to each other are laser welded to form a unit. 1. A method for assembling an electrode for an electron gun, characterized by assembling the electrode.