JPH04167339A - Color selection electrode device for color cathode-ray tube - Google Patents

Abstract

PURPOSE:To obtain uniform tension and reduce a damping time constant by stretching a color selection electrode between frameworks in such a way that load distribution of a load applied to each central portion of the frameworks is larger at both ends of the frameworks. CONSTITUTION:Filament elements 11 are tensely stretched by utilizing restoring force of support pieces 22, and at the time of stretching, a distributed load is applied to frameworks from the outside so that distance of the central portion between the frameworks 21a, 21b becomes shorter than that between both end portions of the frameworks. Consequently, the frameworks 21a, 21b can gain uniform tension both at their central portions and end portions, and since resonance of the filament elements 11 which may be caused by vibration from the outside is prevented, stretching a damper wire can be eliminated. Further, by making each section of the frameworks 21a, 21b a U-shape, the filament elements 11 as a color selection electrode can be made small sized and lightweight.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color selection electrode device for regulating the arrival position of an electron beam of a color cathode ray tube.

[Conventional technology]

Generally, in a color cathode ray tube, a panel part 3 is frit-welded to the open end of a funnel part 2 having a neck part 1 to form a tube sphere 4, as shown in FIG. A fluorescent screen 6 is formed on the inner surface of a face plate 5 of the panel section 3, and a color selection electrode device 7 is installed opposite to the fluorescent screen 6. For example, electron beams 9 corresponding to each color of red, green, and blue are emitted from an electron gun 8 installed in the neck l, and the beam paths are regulated by the color selection electrode device 7 so that the electron beams 9 are directed to the corresponding fluorescent screens 6. Land on the phosphor of the desired color.

FIG. 8 is a perspective view showing a color selection electrode device for a conventional color cathode ray tube. These are the left and right frame arm parts that span the area. A large number of strip elements 11, which are color selection electrodes, are arranged in a stretched manner on the front end faces of the opposing frame sides 10a and 1Ob. Furthermore, several damper wires 12 are provided across the strip element body 11 to intersect with each other.

The color selection electrode device 7 configured as described above is arranged in the panel section 3.
It is held and attached at 3 to 4 points inside.

Next, a method of manufacturing this color selection electrode device for a color cathode ray tube will be explained.

A conventional color selection electrode device includes a pair of opposing frame sides 10a,
A pair of arms 10c and 10d made of an elastic body are welded to the vessel point of IOb or its vicinity, and between the opposing frame sides 10a and IOb are placed at the welding point or a predetermined point outside of it as shown in FIG. A pair of frame side arms 10c and 10 made of elastic material are loaded by two-point support as shown in FIG.
d is deflected by a predetermined amount within the elastic range to compress the space between the supports,
In this state, a large number of metal strip elements 11 are stretched between the frame side arms 10a and 10b and fixed by welding.
When the loads applied to a and 10b are removed, the compressed frame sides 10a and 10b are restored due to the restoring force of the arms 10c and 1Ocl made of elastic bodies, and the tension is applied to the stretched strip element 11. This is how it is done.

[Problem to be solved by the invention]

The color selection electrode device of a conventional color cathode ray tube is constructed as described above, so that the required tension is applied to the strip element body in order to prevent the strip element body from resonating due to external vibrations and causing the screen to itch. Giving is important. In order to provide this tension, the frame structure is complicated and the weight of the frame is also large. Furthermore, it is difficult to obtain the required tension evenly over the surface, and in reality, as shown in FIG. 10, the tension distribution is greater at the ends than at the center of the frame. For this reason, a damper wire may be strung as a vibration damping member for the strip element with less than the required tension, and there is a problem in that the linearity of the wire is projected onto the screen during operation of the cathode ray tube.

This invention was made in order to solve the above-mentioned problems, and it is possible to obtain uniform tension of the color selection electrode without reducing the rigidity of the frame with a simple and lightweight structure. The object of the present invention is to obtain a color selection electrode device for a color cathode ray tube that can keep the constant short.

[Means to solve the problem]

The color selection electrode device for a color cathode ray tube according to the present invention provides a support piece using a spring material between the frame bodies to give a required uniform tension to the color selection electrode, and uses the restoring force of the support piece to perform color selection. Tension is applied to the electrode, and the load applied between the pair of frames is distributed such that it is greater at both ends than at the center.

[Effect]

In this invention, the load applied to a pair of opposing frames is distributed such that the center of the frame is larger than both ends, and this load causes the pair of support pieces made of spring material to move within the elastic range. After bending and compressing a certain amount, in this state, the color selection electrode is stretched between the frames and fixed by welding, and then the load applied between the frames is removed to create a support piece (spring material).
A necessary uniform tension is applied to the compressed color selection electrode due to the restoring force, and as a result, the damper wire can be omitted.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure shows a perspective view of a color selection electrode device for a color cathode ray tube according to an embodiment of the present invention, in which the same reference numerals as in FIGS. 8 and 9 indicate the same or corresponding parts, and 21a and 21b represent a pair of opposing The frame is approximately U-shaped, and its cross section is U-shaped. Reference numeral 22 denotes a support piece made of a spring material such as stainless steel 5us631, which is provided across the frames 21a and 21b. Further, a color selection electrode, for example, a metal strip element body 11, is provided on the front surface of the opposing frame bodies 21a and 21b with respect to the face plate.
or multiple strung arrays.

Next, the manufacturing method will be explained.

In the color selection electrode device of this embodiment, the distance between the frames 21a and 21b at the center between the opposing frames 21a and 21b is smaller than the distance between the frames at both ends, as shown in FIG. A distributed load is applied at at least three points as shown in FIG. In this state, a large number of strip elements 11 are stretched between the frames 2la and 2Ib, welded and fixed, and then when the load applied between the frames 21a and 21b is removed, the restoring force of the support piece 22 The space between the compressed frames 21a and 21b is restored by stretching, and the stretched and welded strip element 11 is stretched to the required length, that is, the strip stretched between the frames 21a and 21b, as shown in FIG. The strip body 11 is stretched almost uniformly over the entire end and center portions of the frame body, and is stretched uniformly beyond the tension required to stretch the damper wire for vibration damping.

As described above, according to this embodiment, the restoring force of the support piece 22 is used to tension and stretch the strip element 11, and when the strip body 11 is stretched, the frame body at the center between the frames 21a and 21b is Since the distributed load is applied from at least three points from the outside so that the distance between This prevents resonance of the strip element 11 caused by vibrations from the damper wire, and as a result, it is possible to omit the need for a damper wire.

Further, since the frames 21a and 21b are made to have a U-shaped cross section to increase the structure, the color selection electrode device can be made smaller and lighter.

In the above embodiment, a large number of strip elements 11 are stretched between a pair of opposing frames as shown in FIG. It can also be used to stretch a thin plate 11' having electron beam transmission holes.

Further, in the above embodiment, a buckling plate spring material is used as the support piece 22, but the shape of the support piece is not limited to this, and for example, a coil spring or the like may be used.

Furthermore, if necessary, as shown in FIG.
In order to increase the strength of the frame in the long side direction,
Various modifications may be made, such as making this part into a radius shape, or further welding a metal plate 31 across the frames 21a and 21b to prevent twisting of the frames.

〔Effect of the invention〕

As described above, according to the color selection electrode device for a color cathode ray tube according to the present invention, the tension of the color selection electrode is obtained by the support piece made of a spring material, and in this case, the frame member at the center of the frame member is Since the color selection electrode is stretched by applying a distributed load from the outside so that the distance between the electrodes is smaller than the distance at both ends, it is possible to obtain the required uniform tension over the entire stretched color selection electrode. As a result, it is possible to omit a damper wire for damping vibrations, and high-definition image quality can be obtained, and the apparatus can also be made smaller and lighter.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a color selection electrode device for a color cathode ray tube according to an embodiment of the present invention, and FIG. 2 is a perspective view of a color selection electrode device for a color cathode ray tube according to an embodiment of the present invention. Figure 3 shows the tension distribution of the color selection electrode when using the color selection electrode device of a color cathode ray tube according to an embodiment of the present invention, Figures 4 and 5 show the types of color selection electrodes. FIG. 6 is a perspective view showing a modification of the color selection electrode device of a color cathode ray tube according to an embodiment of the present invention, and FIG. 7 is a configuration diagram of a color cathode ray tube including the color selection electrode device. , FIG. 8 is a perspective view of a conventional color selection electrode device for a color cathode ray tube, FIG. 9 is a diagram for explaining a method of manufacturing a color selection electrode device for a conventional color cathode ray tube, and FIG. 10 is a perspective view of a conventional color selection electrode device for a color cathode ray tube. FIG. 3 is a diagram showing the tension distribution of color selection electrodes when a cathode ray tube color selection device is used. In the figure, 11 is a strip element (color selection electrode), 21a,
21b is a frame body, 22 is a support piece, and 31 is a color selection electrode (strip element body). In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] A color selection electrode device for regulating the arrival position of an electron beam of a color cathode ray tube, comprising: a pair of frames that span color selection electrodes; and a pair of frames that are held at a predetermined interval. and a support piece made of a spring material, and the color sorting electrode is stretched between the frames so that a load distribution such that the load applied to the center of the frame is greater than the load applied to both ends of the frame. A color selection electrode device for a color cathode ray tube, characterized in that: