JPH10188794A - Flat aperture grill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat aperture grill such that a uniform tensile stress can be produced over the entire area of weld lines. SOLUTION: A flat aperture grill comprises a perforated part comprising slender grids 12 forming slender slits 11 and an outer periphery 13 extending along the outer periphery of the perforated part. On the part of the outer periphery 13 located on the longitudinal extension line of the slender grids 12, slit shaped cutout parts 133 extending in the same direction as the longitudinal direction of the grids 12 are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat aperture grill which is a component of a color selection electrode structure of a color cathode ray tube, and relates to a shape of a flat aperture grill for eliminating deformation of the aperture grill generated in a manufacturing process. It is about.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view showing the structure of an aperture grill type color selecting electrode assembly. In the figure, 1
0 is a slit-like hole (hereinafter referred to as a narrow slit hole) 1
An aperture grille in which a large number of strip grids forming 1 are arranged is arranged. A pair of holding members 21 each having one end fixed to the aperture grille 10 are arranged across the holding members, and are fixed to the holding member 21. A pair of elastic members 2 for generating a predetermined bridge tension on the aperture grill 10
A frame 3 composed of 2 and 3 has one end fixed to the frame 2 and the other end engaged with a pin (not shown) embedded in a panel which is a part of a glass bulb of a color cathode ray tube. The support structure 4 having the holes 311 is fixed to the elastic member 22 of the frame 2 by welding, and the high expansion plate forming a bimetal structure with the elastic member 22 is arranged so as to be in contact with the aperture grill 10. Damper wire that has the function of damping the vibration of
Is a damper spring that acts to apply a predetermined tension to the damper wire 5.

An aperture grille 10 is formed as a single flat aperture grille 1 as shown in FIG. 8 by forming a thin slit hole 11 in a metal material by chemical etching. The flat aperture grill 1 is formed of a perforated portion formed of a strip grid 12 forming a strip slit hole 11, and an outer peripheral portion 13 following the perforated portion.

As shown in FIG. 9A, a method of joining the flat aperture grill 1 to the frame 2 as described above is to attach the outer peripheral portion of the narrow grid of the flat aperture grill 1 in the longitudinal direction to the frame 2. 9 (b), the frame 2 is pushed up from below to remove the slack of the strip grid, thereby removing the slack of the strip grid. The parts in contact with the frame are joined by seam welding. Thereafter, unnecessary portions of the outer peripheral portion are trimmed, and the joining of the aperture grill 10 and the frame 2 is completed.

[0005] A blackening film for the purpose of rust prevention is formed on the frame 2 to which the aperture grill 10 is joined, and then the support structure 3 and the damper wire 5 are attached. After that, it is integrated with the glass panel and sent to a post-process such as the creation of a phosphor screen. The color cathode ray tube manufacturing process includes the blackening film forming process described above, a frit process for joining a funnel attached to the back of a glass panel, and an exhaust process for evacuation.
This is a heating step of about 50 to 480 ° C. At this time, wavy wrinkles may be generated on the joint surface between the aperture grill 10 and the frame 2.

As a method for eliminating the occurrence of wrinkles,
There is a method described in the invention by the same inventor (reference number AP501507) filed at the same time as the present invention. FIG. 10 is a view for explaining such a method. An extension of a grill joint line 7 which is a joint portion of the flat aperture grill 1 with the frame 2 is held by a clamp plate 9 on the grill weld line, and The flat aperture grille 1 is joined to the frame 2 so as to generate a tensile stress in a direction perpendicular to the longitudinal direction of the strip grid.
Further, in this case, the grid longitudinal direction clamp plate 8 is arranged on the longitudinal extension of the grid so as not to generate slack due to displacement of the grid in the longitudinal direction.

However, on the other hand, the restraint by the grid longitudinal clamp plate 8 resists pulling in the direction perpendicular to the longitudinal direction of the strip grid required for the flat aperture grille. There was a problem that the tensile stress became weak. Therefore,
In order to generate the required tensile stress, it is necessary to increase the pushing-up amount of the frame 2 to increase the tensile stress in the central portion where the tensile stress is unlikely to be generated.

A flat aperture grill used in the conventional method shown in FIG. 9 is, as shown in FIG.
A concave line 131 for stripping unnecessary portions and an end shape determining hole 132 are provided near the perforated portion of the outer peripheral portion. The flat aperture grill used in the method shown in FIG. In order to transmit the tensile stress generated in the direction perpendicular to the longitudinal direction of the inside, the end shape determining hole 132 is deleted. For this reason, stresses in both the longitudinal direction of the grid and the direction perpendicular to the longitudinal direction are generated in a mixed manner in the outer peripheral portion outside the end of the welding line. If the unnecessary outer peripheral portion is trimmed in this state, stress concentrates on the end of the joining line, and breakage or wrinkling occurs from that portion. As a countermeasure, it was necessary to adjust the stress generated in the longitudinal direction of the grid and in the direction perpendicular to the longitudinal direction.

[0009]

As described above, the longitudinal direction of the grid is restrained by the clamp plate 8 and the clamp plate 9 is restrained.
When the flat aperture grille 1 is joined to the frame 2 by generating a tensile stress in the direction perpendicular to the longitudinal direction of the strip grid by using the above-described flat aperture grille, the tensile stress is applied over the entire joint. Had to be adjusted to be uniform. Also,
There was a problem that some stress higher than the target stress was generated. Further, in order to prevent the aperture grill portion from breaking or wrinkling, it was necessary to adjust the balance of the stress generated in the grid longitudinal direction and the direction perpendicular to the longitudinal direction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a flat aperture grill which can generate a target tensile stress over the entire joint. . Also,
It is an object of the present invention to provide a flat aperture grill that does not break or wrinkle at the weld line end even when a necessary tensile stress is applied in a direction perpendicular to the longitudinal direction of the grid.

[0011]

According to a first aspect of the present invention, there is provided a flat aperture grill which includes a flat aperture grill having an outer peripheral portion which is on an extension of a longitudinal grid in a longitudinal direction. A slit-shaped notch in the same direction as the direction is provided.

In the flat aperture grill according to the second configuration of the present invention, at the four corners of the outer periphery of the flat aperture grill, on the extension of the outer periphery of the flat aperture grill in the direction perpendicular to the longitudinal direction of the strip grid. A certain outer peripheral portion is provided with a cutout portion so as not to be restrained in the longitudinal direction of the strip grid.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, a flat aperture grill according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a plan view showing a flat aperture grill 1, 11 is a narrow slit hole, and 12 is a narrow slit hole 11.
Are the outer peripheral portions. In the outer peripheral portion 13, a hole 133 cut out in a slit shape (hereinafter, referred to as an outer peripheral grid longitudinal slit hole) 133 is provided on a portion on the extension of the elongated grid 12 in the longitudinal direction, and the longitudinal direction is the longitudinal direction of the elongated grid. Are provided in a direction coinciding with.
When applied to a 17-inch cathode ray tube, the length of the slit 133 in the longitudinal direction of the outer peripheral grid was 50 mm, the width was 1 mm, and the arrangement pitch was 10 mm. A grill welding line area 70 that holds the grid longitudinal direction clamp area 80 of the flat aperture grill 1 and joins the flat aperture grill 1 to the frame 2 includes:
FIG. 2 shows a state where the clamp area 90 on the grill welding line on both sides of the joint line between the flat aperture grill 1 and the frame 2 is clamped and pulled to apply a tensile stress in a direction perpendicular to the longitudinal direction of the strip grid. Show.
In such a state, the stress generated on the joining line was almost uniform from the center to the end regardless of the magnitude of the stress.

In the flat aperture grill 1 according to the first embodiment, the flat aperture grill 1
A slit hole 133 parallel to the grid longitudinal direction is provided in a portion of the outer peripheral portion of the outer peripheral portion, which is on the extension line in the longitudinal direction of the strip grid, outside the welding line with the flat aperture grille frame. Therefore, the grid longitudinal direction is restrained by the grid longitudinal direction clamp plate and is not displaced, but the displacement is loosened to some extent in the direction perpendicular to the grid longitudinal direction. For this reason, when the end on the grill welding line is pulled to apply a tensile stress on the grill welding line, all the pulling force is applied on the grill welding line, so that the tensile stress is uniform over the entire area on the grill welding line. Occurs.

In the first embodiment, the outer peripheral portion 13
Of the above, the outer circumferential grid longitudinal slit holes 133 are provided in a portion on the extension line in the longitudinal direction of the thin grid 12, but it may be a mere slit notched to the end.

Embodiment 2 A flat aperture grill according to a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a plan view showing the flat aperture grill 1, in which cutout areas 134 are provided at four corners of the outer peripheral portion 13. The cutout region 134 is a region which is outside from the extension of the outermost grid and 10 mm outward from the extension of the grill welding line. The grid welding line area 70 holding the grid longitudinal direction clamp area 80 of the flat aperture grill 1 and joining the flat aperture grill 1 to the frame 2 has a tensile stress in a direction perpendicular to the longitudinal direction of the strip grid. , Flat aperture grill 1
FIG. 4 shows a state where the clamp area 90 on the grill welding line on both sides of the joint line with the frame 2 is clamped and pulled.
Shown in In such a state, due to the presence of the cutout area 134, no stress is generated in the outer peripheral portion outside the end of the grill welding line in the grid longitudinal direction, and only tensile stress in the direction perpendicular to the grill longitudinal direction is generated. Did not. Therefore, in this state, the flat aperture grill 1 welded to the frame 2 and trimming the unnecessary outer peripheral portion did not generate wrinkles as in the conventional flat aperture grill.

In the flat aperture grill 1 according to the second embodiment, since there are cutout areas 134 at the four corners, the clamp in the longitudinal direction of the grid does not work outside the ends of the grill welding line, so that tensile stress is applied to the grill welding line. Is generated, the generated stress is only in the direction perpendicular to the longitudinal direction of the grid, and the concentration of unnecessary stress on the end of the grill welding line is reduced. For this reason, wrinkles at the ends caused by stress concentration are eliminated.

Embodiment 3 A flat aperture grill according to a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a plan view showing the flat aperture grill 1, in which the four corners of the outer peripheral portion 13 are substantially parallel to the grill welding direction (the direction perpendicular to the grid longitudinal direction) instead of the cutout region 134 of the second embodiment. A hole 135 cut out in a slit shape (hereinafter, referred to as an outer peripheral grille welding line direction slit hole) 135 is provided. The longitudinal direction of the outer periphery grill welding line direction slit hole 135 extends vertically from the extension of the outermost end grid to the outside and extends to a position of about 10 mm from the outside. Further, the slit hole 135 is located at a position 10 mm outward from an extension of the grill welding line, and several similar slit holes are arranged outside the slit hole to prevent the deformation from being concentrated on the slit hole. . The pitch of the slits 135 was 10 mm, and the width of the slits was 1 mm. Even in such a configuration, similar to the second embodiment, a clamp in the grid longitudinal direction is effective outside the edge of the grill welding line because of the notches (slit holes 135) in the four corners in the direction perpendicular to the longitudinal direction of the grid. Therefore, when a tensile stress is generated on the grill welding line, the generated stress is only in a direction perpendicular to the longitudinal direction of the grid, and the concentration of unnecessary stress on the end of the grill welding line is reduced. The same effect can be obtained. In this case, the outer peripheral shape of the flat aperture grill 1 is the same as that of the conventional one, and there is an advantage that the handling is easier because the corners are smaller than in the second embodiment.

The outer peripheral grille welding line direction slit hole 135 may be a simple slit notched to the end.

Embodiment 4 Fourth Embodiment A flat aperture grill according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a plan view showing the flat aperture grill 1, which incorporates both the first embodiment and the third embodiment of the present invention. In this case, the target tensile stress was secured uniformly over the entire welding line, and a wrinkle was not generated outside the end of the grill welding line. Further, the same effect can be obtained in a device incorporating both the first embodiment and the second embodiment.

[0021]

As described above, according to the first configuration of the present invention, the outer peripheral portion of the flat aperture grille, which is on the extension of the longitudinal direction of the strip grid, is provided with the longitudinal direction of the grid. Since the slit-shaped notches having the same orientation are provided, it is possible to easily generate a uniform tensile stress over the entire weld line when the end on the weld line is pulled.

Further, according to the second configuration of the present invention, at the four corners of the outer peripheral portion of the flat aperture grill, the outer peripheral portion of the flat aperture grill is on an extension of the direction perpendicular to the longitudinal direction of the strip grid. The outer periphery is provided with a notch to prevent it from being constrained in the longitudinal direction of the strip grid, so even if a required tensile stress is applied in the direction perpendicular to the longitudinal direction of the grid, breaks or wrinkles may occur at the weld line end. Does not occur.

[Brief description of the drawings]

FIG. 1 is a plan view showing a flat aperture grill according to a first embodiment of the present invention.

FIG. 2 is a perspective view illustrating a method of manufacturing a color selection electrode assembly using the flat aperture grill according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a flat aperture grill according to a second embodiment of the present invention.

FIG. 4 is a perspective view illustrating a method of manufacturing a color selection electrode assembly using a flat aperture grill according to a second embodiment of the present invention.

FIG. 5 is a plan view showing a flat aperture grill according to a third embodiment of the present invention.

FIG. 6 is a plan view showing a flat aperture grill according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view showing the structure of an aperture grill type color selection electrode assembly.

FIG. 8 is a schematic configuration diagram showing a flat aperture grill.

9A and 9B are a perspective view and a partial cross-sectional configuration diagram illustrating a method for manufacturing a conventional color selection electrode assembly.

FIG. 10 is a perspective view illustrating a method for manufacturing a color selection electrode assembly according to the present invention.

FIG. 11 is a partial plan view showing the shape of the outer peripheral portion of a conventional flat aperture grill.

[Explanation of symbols]

1 flat aperture grille, 10 aperture grille, 11 narrow slit holes, 12 narrow grids, 1
3 outer peripheral portion, 131 concave line, 132 end shape determining hole, 133 outer peripheral grid longitudinal slit, 13
4 Notch area, 135 outer periphery grille welding line direction slit hole, 2 frame, 21 holding member, 22 elastic member, 3 support structure, 311 fitting hole, 4 high expansion plate, 5 damper wire, 6 damper spring, 7 grill Welding line, 70 grill weld line area, 8 grid longitudinal clamp plate, 80 grid longitudinal clamp area, 9 grill weld line clamp plate, 90 grill weld line clamp area.

Claims (2)

[Claims] 1. A flat aperture grill comprising a perforated portion formed of a strip grid forming a strip slit hole and an outer peripheral portion extending around the perimeter of the perforated portion. A flat aperture grill, wherein a slit-shaped notch is provided in an outer peripheral portion on an extension of a longitudinal direction of the strip grid in the same direction as the longitudinal direction of the grid. 2. A flat aperture grill comprising a perforated portion formed of a strip grid forming a strip slit hole and an outer peripheral portion extending around the perimeter of the perforated portion. At the four corners, of the outer peripheral portion of the flat aperture grill, a notch portion is provided so that the outer peripheral portion on an extension of the direction perpendicular to the longitudinal direction of the strip grid is not restricted by the longitudinal direction of the strip grid. A flat aperture grill characterized by the following.