JP2003173747A - Support member for color selection electrode, color selection electrode, and manufacturing method of color selection electrode, and welding electrode - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To weld in good precision a support member for the color selection electrode and a color selection mask. <P>SOLUTION: The support member 21 of the frame 20 faces the color selection mask 10 and comprises a surface 21S to which the color selection mask 10 is welded. At least a part (here, the total) of the surface 215 is formed in a curvature that is inflated to the side where the color selection mask 10 is arranged (protruded to the side on which the color selection mask 10 is arranged) and, more concretely, it is formed in a circular arc-shape (R round shape) in a cross section view or side view. Thereby, the color selection mask 10 point- contacts the surface 21S of the support member 21 (line contact in a plan view from the surface 21S and the color selection mask 10). <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color selection electrode support member, a color selection electrode, a method for manufacturing a color selection electrode, and a welding electrode, and more specifically to a color selection electrode support member and a color selection mask. The present invention relates to a technique for accurately welding and.

[0002]

2. Description of the Related Art A color cathode ray tube is provided with a fluorescent screen and a color selection electrode having a color selection mechanism provided facing the fluorescent screen, and the electron beam is directed onto a predetermined fluorescent pattern by the color selection electrode. Then, a color image is formed.

FIG. 8 is a perspective view for explaining a conventional color selection electrode 1P. The color selection electrode 1P is a color selection mask 10
And the frame 20P. The color selection mask 10 is composed of a thin metal plate having a plurality of selectively etched openings. The frame 20P includes a pair of support members 21P,
And a pair of elastic members 22 having elasticity for connecting the pair of supporting members 21P to each other. The support member 21 and the elastic member 22 are formed by bending a plate-shaped metal.

The support member 21P has a flat surface 21SP facing the color selection mask 10.
The color selection mask 10 is welded and fixed to the SP (see FIG. 9).

The frame 20P further includes a supporting structure 23, and one end of the supporting structure 23 is the frame 20P.
, And the other end has an engaging hole 23a for engaging with a pin (not shown) provided in the glass container of the color cathode ray tube.

Next, a manufacturing method (assembly method) of the color selection electrode 1P will be described with reference to FIGS. 8 and 9. Note that FIG.
8 is a cross-sectional view (or a side view) of the portion A in FIG. 8 viewed from the direction of arrow B, and the welding electrode 51 is also shown for explanation.

First, the frame 20P is pressed and bent in the direction shown by the arrow F in FIG. 8, and the color selection mask 10 is pressed against the surface 21SP of the support member 21P. At this time, the color selection mask 10 has the planar surface 21SP of the support member 21P.
Placed in surface contact with. While maintaining this surface contact state, seam welding or the like is performed in the direction along the surface 21SP of the support member 21P, so that the color selection mask 10 is attached to the frame 2
Weld fixed to 0P. In addition, the welding point is shown by X mark in FIG. After completion of the welding and fixing, the pressure for removing vibration can be applied to the color selection mask 10 for preventing vibration.

[0008]

[Problems to be Solved by the Invention] Conventional color selection electrode 1P
Then, due to the shape accuracy (dimensional accuracy) of the frame 20P and the support member 21P, the color selection mask 10 is moved to the frame 20.
The problem that P (position) cannot be welded and fixed with high accuracy tends to occur.

Specifically, as shown in FIG. 10, when the support member 21P is inclined by an angle α with respect to a predetermined position due to a connection failure between the support member 21P and the elastic support member 22, for example,
The surface 21SP of the support member 21P is inclined. In this case, since welding is performed along the inclined surface 21SP, it is difficult to weld and fix the color selection mask 10 with a predetermined accuracy.

Further, as shown in FIG. 11, the surface 21SP of the support member 21P is caused by, for example, a problem in bending.
Even if is inclined from the predetermined angle by β, since welding is performed on the surface 21SP in the inclined state, it is difficult to weld and fix the color selection mask 10 with predetermined accuracy.

As a result, the yield is reduced.

The present invention has been made in view of the above points, and it is a first object of the present invention to provide a support member for a color selection electrode capable of accurately welding a color selection mask.

Further, the present invention provides a color selection electrode using a support member for a color selection electrode which realizes the first object, a method for producing the same, and a welding electrode suitable for the production method. Is the second purpose.

[0014]

A support member for a color selection electrode according to claim 1 is a support member for a color selection electrode that supports a color selection mask, and faces the color selection mask. Is welded, and the surface includes at least a part of a curved surface that bulges toward the side where the color selection mask is arranged.

A support member for a color selection electrode according to a second aspect is the support member for a color selection electrode according to the first aspect,
The curved surface has an arcuate cross section.

The color selection electrode according to claim 3 is the color selection electrode according to claim 1.
Alternatively, the color selection electrode support member according to claim 2 and a color selection mask welded and fixed to the surface of the color selection electrode support member.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a color selection electrode, comprising: (a) preparing the color selection electrode support member according to the first or second aspect; and (b) preparing a color selection mask. And (c) contacting the surface of the color selection electrode support member with the color selection mask, and (d) facing the color selection electrode support member through the color selection mask. A welding electrode and welding the color selection mask and the color selection electrode support member.

A method of manufacturing a color selection electrode according to a fifth aspect is the method of manufacturing a color selection electrode according to the fourth aspect,
The welding electrode comprises an electrode surface facing the color selection mask during welding, the step (d), (d) -1) the width of the electrode surface of the welding electrode, the color selection mask and A step of absorbing a deviation between a contact position of the support member for the color selection electrode with the surface and an arrangement position of the welding electrode is included.

A method of manufacturing a color selection electrode according to claim 6 is the method of manufacturing a color selection electrode according to claim 4,
The welding electrode includes a concave electrode surface facing the color selection mask during welding, and a cross section of the electrode surface of the welding electrode is in close contact with a cross section of the surface of the color selection electrode support member. It includes a curve or a curve that is gentler than the cross section of the surface.

A method of manufacturing a color selection electrode according to claim 7 is the method of manufacturing a color selection electrode according to any one of claims 4 to 6, wherein the step (d) includes (d). -2) Inclining the welding electrode to the outside of the color selection mask with respect to the direction perpendicular to the color selection mask to perform welding.

The welding electrode according to claim 8 is a welding electrode for welding the color selection mask to the support member for the color selection electrode according to claim 1 or 2, wherein the color is used during welding. A concave electrode surface facing the color selection electrode support member through a selection mask is provided, and a cross section of the electrode surface of the welding electrode is a curve in close contact with a cross section of the surface of the color selection electrode support member. Alternatively, it includes a gentler curve than the cross section of the surface.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Preferred Embodiment> FIG. 1 shows a cross-sectional view (or a side view) for explaining a color selection electrode 1 according to a first preferred embodiment and a method for manufacturing the same. Note that FIG. 1 corresponds to FIG. 9 described above, and also shows the welding electrode 51 for the sake of explanation.

As shown in FIG. 1, the color selection electrode 1 includes a color selection mask 10 and a frame 20. Frame 2
0 support member (or color selection electrode support member) 21
Has a J-shape in cross section or side view in the vicinity of facing the color selection mask 10.

More specifically, the support member 21 is the color selection mask 1
It has a surface 21S which faces 0 and on which the color selection mask 10 is welded. In particular, the entire surface 21S is formed into a curved surface that is bulged toward the side on which the color selection mask 10 is arranged (convex toward the side on which the color selection mask 10 is arranged), and more specifically, in a cross-sectional view or a side view. Is formed in an arc shape (R shape). The curved surface 21S corresponds to the above-mentioned J-shaped curved portion. The support member 21 is formed, for example, by bending a plate-shaped metal. At this time, the support member 21
The surface 21S can be formed by pressing into an arc shape instead of the conventional flat shape.

The color selection mask 10 has a supporting member 21.
Is welded and fixed to the surface 21S of the support member 21
Supported by. In this welding fixing, the surface 21S of the support member 21 and the color selection mask 10 are brought into contact with each other, and the welding electrode 51 is arranged so as to face the surface 21S of the support member 21 through the color selection mask 10.
Is performed by, for example, seam welding. In the case of seam welding, the welding electrode 51 is a disc electrode, as shown in FIG.
Shows a side view of the end of the disc-shaped welding electrode 51. In addition, in FIG. 1 and the like, welding points are indicated by crosses.

Various structures such as the conventional color selection electrode 1P (see FIG. 8) can be applied to other configurations of the color selection electrode 1. The opening of the color selection mask 10 is not limited to the slot shape shown in FIG. 8, and may be, for example, a round hole (dot) shape or a so-called aperture grill shape.

As described above, the surface 21S of the support member 21 is formed as a curved surface that bulges toward the side on which the color selection mask is arranged. Therefore, the color selection mask 10 is not attached to the curved surface as in the conventional case. , Point contact in the cross-sectional view or the side view of the surface 21S and the color selection mask 10 (the surface 21S concerned).
S and the color selection mask 10 can be brought into line contact in a plan view).

In this point (line) contact state, as shown in the sectional view (or side view) of FIG. 2, the support member 21 is predetermined due to a connection failure between the support member 21 and the elastic support member 22 (see FIG. 8). Even if it is tilted at an angle α with respect to the position, it is realized by any place on the curved surface of the surface 21S. Similarly, for example, even if the curved surface shape of the surface 21S varies with respect to the predetermined shape (even if the radius of the circular arc of the cross section varies), the above-mentioned point (line) contact state is determined at any point in the curved surface of the surface 21S. Is realized by That is, even if the shape accuracy of the support member 21 or the frame 10 using the member 21 is low (even if the shape variation is large), the above point (line) contact state is realized by any place in the curved surface. It

Therefore, by applying the welding electrode 51 to such a point (line) contact position to perform welding, the color selection mask 10 can be welded and fixed to the support member 21 with high precision.
Therefore, the yield of the color selection electrode 1 can be improved. Further, since the shape accuracy required for the support member 21 and the frame 20 is relaxed, the support member 21 and the frame 2
The yield of 0 can also be improved. As a result, the color selection electrode 1 can be manufactured and provided at low cost.

In the above description, the surface 21S of the support member 21
The case where the entire surface is a curved surface has been described.
At least a part of S (more specifically, the color selection mask 10
The above-described effect can be obtained if the portion (close to the) includes a curved surface that bulges toward the color selection mask 10. For example, the surface 21S of the support member 21 may be formed in a mountain shape having a rounded top in a cross sectional view or a side view (that is, a shape including a curved surface corresponding to the above curved surface and a flat surface following the curved surface).

Further, it is more preferable that the cross section of the curved surface is arcuate as a whole. In this case, since the curved surface and the color selection mask 10 can be brought into point (line) contact with any portion of the curved surface having an arcuate shape in cross section, the above-described effect can be more reliably obtained.

Second Embodiment Now, for example, due to the positioning accuracy of the welding machine and the variation in the shape of the frame 20, the surface 21S of the support member 21 and the color selection mask as shown by the one-dot chain line in FIG. The welding electrode 51 may come into contact with a position displaced from the point (line) contact position P with the welding electrode 10. In this case, a welding defect such as welding splash (spark) is likely to occur in the gap S between the color selection mask 10 and the support member 21 below the welding electrode 51.

Therefore, in the second embodiment, a manufacturing method capable of suppressing and preventing such welding defects will be described. As shown in the cross-sectional view (or side view) of FIG. 4, the welding electrode 52 is used in the method of manufacturing the color selection electrode 1 according to the second embodiment.
In the case of seam welding, for example, the welding electrode 52 has a disc shape.

In particular, the electrode surface 52S of the welding electrode 52 which faces the color selection mask 10 during welding has a linear shape in cross section or side view.
And a surface 21S of the support member 21 and a contact position P of the electrode surface 52S of the welding electrode 52 with respect to the center position (center line) can be displaced (shift amount) g (see FIG. 3) width 52w or more. ing. The amount of deviation g can be predicted to some extent due to, for example, the positioning accuracy of the welding machine and the variation in the shape of the frame 20 as described above.

According to the welding electrode 52, even if the welding electrode 5
Even if the central axis of the second electrode surface 52S deviates from the contact position P between the color selection mask 10 and the support member 21, the welding electrode 52 can be contacted at the point (line) contact position P. That is, in the welding process using the welding electrode 52, the displacement between the contact position P between the color selection mask 10 and the surface 21S of the support member 21 and the position where the welding electrode 52 is arranged is
It is absorbed by the width 52w of the electrode surface 52S. Thereby, welding defects such as splash can be prevented and reliable welding can be performed.

If the width 52w of the electrode surface 52S is not less than twice the displacement amount g, it is possible to deal with the displacement in any of the left and right directions in FIG. 4, and the above-mentioned effect can be obtained more reliably.

<Third Embodiment> As shown in the sectional view (or side view) of FIG. 5, a welding electrode 53 is used in the method of manufacturing the color selection electrode 1 according to the third embodiment. In the case of seam welding, for example, the welding electrode 52 has a disc shape.

Particularly, in the welding electrode 53, the electrode surface 53S facing the color selection mask 10 at the time of welding is the supporting member 2
The concave electrode surface 53S has a cross section of the surface 21S of the support member 21.
It includes a curve that can be in close contact with the cross section of S. Therefore, during welding, the welding electrode 53 and the supporting member 21 are engaged with each other (similarly to the engagement between the wheel and the rail, for example), so that positional deviation can be suppressed and good welding can be performed.

The same effect can be obtained by forming the concave electrode surface 53 so that the cross section of the electrode surface 53S of the welding electrode 53 includes a gentler curve than the cross section of the surface 21S of the supporting member 21. .

<Embodiment 4> By the way, as shown in the sectional view (or side view) of FIG. 6, a point (line) between the surface 21S of the support member 21 and the color selection mask 10 due to, for example, variation in the shape of the frame 20. When the distance d from the contact position P to the end of the surface 21S is short, if welding is performed at the contact position P, welding defects such as splash may occur near the end of the surface 21S and the welding may not be stable. is there.

Therefore, in the manufacturing method according to the fourth embodiment, as shown in FIG.
Welding is performed with the angle θ inclined to the outside (in plan view) of the color selection mask 10 with respect to the direction perpendicular to 0. This allows
Since the distance between the end of the surface 21S of the support member 21 and the welding position can be increased, even when the end of the surface 21S is close to the contact position P between the support member 21 and the color selection mask 10. Welding defects such as splash can be prevented (see FIG. 7). In other words, the angle θ is defined so that splash or the like does not occur.

The above-mentioned welding electrodes 51, 52 (see FIG. 1,
The same effect can be obtained by similarly tilting (see FIG. 4).

[0043]

According to the invention of claim 1, the surface of the support member for the color selection electrode includes a curved surface bulging toward the side where the color selection mask is arranged. Instead of such surface contact, it is possible to make point (line) contact. This point (line) contact state is realized by any part of the curved surface even if the color selecting electrode support member or the frame using the member has low shape accuracy (large shape variation). . As a result, the color selection mask can be welded and fixed to the color selection electrode support member with high precision, so that the yield of the color selection electrodes can be improved. In addition, since the shape accuracy required for the color selection electrode support member and the frame is relaxed, the yield of these can be improved.

According to the second aspect of the present invention, the curved surface and the color selection mask can be brought into point (line) contact with each other at any position on the curved surface having an arcuate cross section. Therefore, the above-described yield improving effect can be obtained more reliably.

According to the invention of claim 3, an inexpensive color selection electrode can be provided due to the above-mentioned yield improving effect.

According to the invention of claim 4, the surface of the color selection electrode support member and the color selection mask can be brought into point (line) contact. Therefore, the color selection electrode can be manufactured at low cost due to the above-described yield improving effect.

According to the invention of claim 5, welding defects such as splash can be prevented.

According to the invention of claim 6, the color selection electrode support member and the welding electrode are engaged with each other, so that positional deviation can be suppressed and good welding can be performed.

According to the seventh aspect of the present invention, even if the end portion of the surface of the color selection electrode support member is close to the contact position between the surface of the support member and the color selection mask, a splash or the like will not occur. Welding defects can be prevented.

According to the invention of claim 8, since the color selection electrode support member and the welding electrode are engaged with each other, it is possible to suppress positional deviation and perform good welding.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a color selection electrode according to a first embodiment and a method for manufacturing the same.

FIG. 2 is a cross-sectional view for explaining the color selection electrode according to the first embodiment and a method for manufacturing the same.

FIG. 3 is a cross-sectional view for explaining displacement of a welding electrode with respect to a contact point between a color selection mask and a support member.

FIG. 4 is a cross-sectional view for explaining the method of manufacturing the color selection electrode according to the second embodiment.

FIG. 5 is a cross-sectional view for explaining the method of manufacturing the color selection electrode according to the third embodiment.

FIG. 6 is a cross-sectional view for explaining the method of manufacturing the color selection electrode according to the fourth embodiment.

FIG. 7 is a cross-sectional view for explaining the color selection electrode according to the fourth embodiment and a method for manufacturing the same.

FIG. 8 is a perspective view illustrating a conventional color selection electrode.

FIG. 9 is a cross-sectional view for explaining a conventional method for manufacturing a color selection electrode.

FIG. 10 is a cross-sectional view for explaining a conventional method for manufacturing a color selection electrode.

FIG. 11 is a cross-sectional view for explaining a conventional method for manufacturing a color selection electrode.

[Explanation of symbols]

1 color selection electrode, 10 color selection mask, 21 support member (color selection electrode support member), 21S surface, 51-53
Welding electrode, 52S, 53S electrode surface, 52w width,
P contact position.

Claims (8)

[Claims] 1. A support member for a color selection electrode that supports a color selection mask, comprising a surface facing the color selection mask and to which the color selection mask is welded, the surface being at least partially covered by the color selection mask. A support member for a color selection electrode, which includes a bulged curved surface on the side where a mask is arranged. 2. The support member for a color selection electrode according to claim 1, wherein the curved surface has an arc-shaped cross section. 3. A color selection electrode comprising: the color selection electrode support member according to claim 1; and a color selection mask welded and fixed to the surface of the color selection electrode support member. 4. A method of manufacturing a color selection electrode, comprising: (a) preparing the color selection electrode support member according to claim 1 or 2; and (b) preparing a color selection mask. And (c) contacting the surface of the color selection electrode support member with the color selection mask, and (d) welding so as to face the color selection electrode support member through the color selection mask. A method of manufacturing a color selection electrode, comprising a step of disposing electrodes and welding the color selection mask and the color selection electrode support member. 5. The method of manufacturing a color selection electrode according to claim 4, wherein the welding electrode includes an electrode surface facing the color selection mask during welding, and the step (d) includes: d) -1) Depending on the width of the electrode surface of the welding electrode, absorbs the deviation between the contact position between the color selection mask and the surface of the color selection electrode support member and the arrangement position of the welding electrode. A method of manufacturing a color selection electrode, the method including a step. 6. The method of manufacturing a color selection electrode according to claim 4, wherein the welding electrode has a concave electrode surface facing the color selection mask during welding, The method for producing a color selection electrode, wherein the cross section of the electrode surface includes a curve that is in close contact with the cross section of the surface of the color selection electrode support member or a curve that is gentler than the cross section of the surface. 7. The method of manufacturing a color selection electrode according to claim 4, wherein the step (d) comprises (d) -2) using the welding electrode as the color selection mask. A method for manufacturing a color selection electrode, comprising the step of welding while tilting to the outside of the color selection mask with respect to a vertical direction. 8. A welding electrode for welding a color selection mask to the color selection electrode support member according to claim 1 or 2, wherein the color selection is performed via the color selection mask during welding. A concave electrode surface facing the electrode supporting member is provided, and the cross section of the electrode surface of the welding electrode is more closely curved than the cross section of the surface of the color selecting electrode supporting member or the cross section of the surface. Welding electrodes, including gentle curves.