JPH04337227A - Color screening electrode device for color cathode-ray tube - Google Patents

Abstract

PURPOSE:To provide a color screening electrode device capable of uniformly stretching color screening electrodes. CONSTITUTION:When the distance between opposite long sides of a frame 25 is pinched and compressed, short sides of the frame 25 are bent with an electrode suspension opening face 27 faced inwardly, the bent short sides of the frame 25 are deployed at the time of a release, and deploying spring pieces 2-5 stretching color screening electrodes 26 are provided. When the distance between the long sides of the frame 25 are pinched and compressed by the deploying spring pieces 2-5, the short sides of the frame 25 are invariably bent in the fixed direction, thus the frame 25 can be deformed in the stable state. The relative position between both frame bodies 21, 22 is stabilized when the color screening electrodes 26 are suspended, and the color screening electrodes 26 can be uniformly stretched at the time of release.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a color selection electrode device for a color cathode ray tube, which comprises a color selection electrode stretched under tension on a frame, and more particularly, a structure of a spring member that tensions the color selection electrode. Regarding.

0002

2. Description of the Related Art As shown in the configuration diagram of FIG. 6, a color cathode ray tube has a neck portion (11), a funnel portion (12),
It is a tube consisting of a panel part (13) frit-welded to the open end of the funnel part (12), and a fluorescent screen (15) is formed on the inner surface of the face plate (14) of the panel part (13). ing.

[0003] Inside the panel part (13), electron beams (17) corresponding to each color such as red, green, and blue emitted from the electron gun (16) in the neck part (11) are emitted by fluorescent lights. A color-selective electrode arrangement (18) is arranged for landing on the corresponding colored phosphors of the surface (15).

As shown in the perspective view of FIG. 7, the color selection electrode device (18) includes a pair of U-shaped frames (21), (2
By connecting both ends of the frame (2) with spring members (23) and (24), a rectangular frame (25) with the connected portion as the short side is formed, and the frame (2)
5), a color selection electrode (26) consisting of a large number of strip elements is stretched over the color selection electrode (26). The color selection electrode (26)
In order to prevent the image from shaking due to resonance due to external vibrations, the electrode tensioning opening surface (27), which is one opening surface of the frame (25), is provided with large spring materials (23) and (24). Due to the elastic force, the opposite long sides of the frame (25) are kept under tension.

The frames (21) and (22) constituting the frame (25) are designed to have sufficient rigidity to tension the color selection electrode (26) and to be as light as possible, for example. It is formed by a bar with a U-shaped cross section.

This color-selecting electrode device (18) has color-selecting electrodes (26) inside the panel section (13) of the color cathode ray tube via holding members (28) fixed to the four corners of the frame (25). is held facing the fluorescent screen (15).

By the way, in the conventional color selection electrode device (18), a spring material (23) that tensions the color selection electrode (26),
(24), as shown in the main part perspective views of FIGS. 7 and 8,
It is a long plate with doglegged bent parts (23a) and (24a) formed in the center, and is fixed to the side of the frame (25), and its elastic force, in this case, Body (21
), (22) are tensioned by the stretching force in the direction of separating them from each other.

In the color selection electrode device (18) provided with such spring members (23) and (24), the color selection electrode (2
6) on the frame (25), use the spring material (2
3) The opposing long sides of the frame (25) are pinched and compressed against the stretching forces of (24). Then, the spring material (23
) and (24) are further bent, both frames (21) and (22) move in parallel and approach each other, and the long sides of the frame (25) The interval narrows. In this state, the color selection electrode (26) is stretched, and then when the frame (25) is released from the compressed state, the color selection electrode (26) is tensed by the stretching force of the spring members (23) and (24).

[0009]

As described above, the color selection electrode (26) is tensioned against the frame (25) with a certain tension. Here, since the vector of the stretching force of the spring members (23) and (24) and the vector of the tension force of the color selection electrode (26) do not exist on the same straight line, a moment is generated by these two forces, and this moment is Frame (21
), (22) are bent into a dogleg shape bent toward the electrode tension opening surface (27). For this reason, there was a problem in that the tension of the color selection electrode (26) did not reach a predetermined value.

Furthermore, when the color selection electrode (26) is stretched by pinching and compressing the opposing long sides of the frame (25), the spring members (23) and (24) have to resist the strong stretching force. Therefore, it is extremely difficult to reduce the distance between the frames (21) and (22) in a stable manner. That is, in the conventional color selection electrode device (18), when the color selection electrode (26) is stretched, the relative position of both frames (21), (22) is unstable, so the frame (25) Both frames (21), (2
There was also the problem that the color selection electrodes (26) were difficult to tension uniformly because the color selection electrodes (26) were misaligned. If the color selection electrode (26) is not tensioned evenly, the color selection electrode (26)
does not function properly, resulting in a decline in the performance of the color cathode ray tube.

The present invention has been made to solve these problems, and it is possible to tension the color selection electrode with sufficient tension and to keep the frame in a stable state when the color selection electrode is stretched on the frame. The object of the present invention is to obtain a color-selecting electrode device that can be deformed and tensioned uniformly by color-selecting electrodes.

0012

[Means for Solving the Problems] In order to achieve the above object, the color sorting electrode device according to the present invention uses a spring material that tensions the color sorting electrode when the opposite long sides of the frame are pinched and compressed. In addition, the short side of the frame is bent with the electrode tension opening surface facing inside, and a deploying spring piece is provided which tensions the color selection electrode by deploying the bent short side of the frame when released.

[0013]

[Operation] By providing the above-mentioned deployment spring pieces, when the long sides of the frame are pinched and compressed, the short sides of the frame always bend in a certain direction, making it possible to deform the frame in a stable state. . This makes it possible to stabilize the relative position of both frames when the color selection electrode is stretched, and to uniformly tension the color selection electrode with a predetermined tension when released.

[0014]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

FIG. 1 is a perspective view of a main part of a color selection electrode device for a color cathode ray tube according to the present invention, and FIG. 2 is a plan view of the color selection electrode device. In FIGS. 1 and 2, components that are the same as those in the conventional example shown in FIGS. 7 and 8 are given the same reference numerals, and their explanations will be omitted. As shown in the figure, the features of this color selection electrode device (1) are a pair of U-shaped frames (21),
(22) are connected to each other to form a frame (25), and deployable spring pieces (2) to (5) are provided as spring members for tensioning the color selection electrode (26). Other configurations are similar to the conventional example.

In the case of this embodiment, the expansion spring pieces (2) to
(5) has a long plate shape and has doglegged bent portions (2a) to (5a) formed along the width direction in the center, and the inner surface of the frame (25), i.e. The electrode tension opening surface (
27) side and the side surface of the frame (25), with both ends fixed to each of the frames (21) and (22), symmetrically provided on both sides of the frame (25).

[0017] Deployable spring pieces (2), (
3) is bent along the bending portions (2a) and (3a) due to its elasticity.

On the other hand, the deployment spring pieces (4) and (5) provided perpendicularly to the opening surface (27) on the side surface of the frame (25) are arranged at the bent portions (4a) and (5a). The elastic force is set to be small on the electrode tension opening surface (27) side and large on the opposite side, and the elastic force is set to be small on the electrode tension opening surface (27) side and large on the opposite side.
) is bent toward the electrode extension opening surface (27).

In the color selection electrode device (1) provided with the deployable spring pieces (2) to (5), when the color selection electrode (26) is stretched on the frame (25), the frame (25) is When the opposing long sides are pinched and compressed, the expansion spring pieces (2) to (5) are bent as described above, as shown in the operation explanatory diagram of FIG. The short side is bent with the electrode extension opening surface (27) facing inside. In other words, the above deployment spring pieces (2) to (5)
The elastic force of is set appropriately.

Furthermore, if the short pieces of the frame (25) do not bend into the desired shape simply by setting the elastic forces of the deployable spring pieces (2) to (5), the short pieces of the frame (25) may be bent as shown in FIG.
5) A desired shape is obtained by moving the load position when compressing the long sides toward the electrode tension opening surface (27), that is, compressing at the position indicated by the arrow Y in the figure.

[0021] In this state, the color selection electrode (26) is stretched,
After that, when the frame (25) is released from the compressed state,
Due to the elastic force of the above-mentioned deployment spring pieces (2) to (5),
As shown in the operation diagram (B), the bent frame (
The short side of 25) unfolds and restores itself, thereby tensioning the color selection electrode (26).

In this way, the color selection electrode device 1 having the above configuration
Now, when the long sides of the frame (25) are pinched and compressed,
Since the short sides of the frame (25) are always bent in a certain direction, it becomes possible to deform the frame (25) in a stable state. This makes it possible to stabilize the relative position of both frames (21) and (22) when tensioning the color selection electrode (26), and to uniformly tension the color selection electrode (26) when released. Become.

Moreover, as in this embodiment, by providing the deployable spring pieces (2) and (3) parallel to the electrode tension opening surface (27), sufficient rigidity in the long side direction of the frame (25) can be ensured. This makes it possible to reliably suppress lateral displacement between the frames (21) and (22) and further stabilize their relative positions. That is, the color selection electrode (26) can be prevented from deforming from a rectangle to a parallelogram.

Like the deployable spring pieces (4) and (5) provided on the side surface of the frame (25), the elastic force is set to be small on the side of the electrode tension opening (27) and large on the opposite side. As shown in the main part side view of FIG. 4(A), the lengths of the deployable spring pieces (4) and (5) are made longer on the electrode tensioning opening surface (27) side and shorter on the opposite side. Only the portions near the edges at both ends may be fixed to each frame body (21), (22) by spot welding or the like. Alternatively, as shown in the side view of the main part in FIG.
27) You may cut out the center of the side edge in a V shape.

Furthermore, instead of the deployable spring pieces (4) and (5) on the side surfaces of the frame (25), as shown in the perspective view of the main part of FIG. 5 (only one side of the frame (25) is shown), the frame ( 25) on the other opening surface (29) side, the deployment spring pieces (2), (3) are parallel to the deployment spring pieces (2), (3) on the electrode tension opening surface (27) side. larger in shape,
The deployment spring piece (
Even if 6) is provided, the same operation and effect as in the above embodiment can be obtained.

[0026]

[Effects of the Invention] As explained above, in the color selection electrode device of the present invention, the color selection electrode can be uniformly tensioned with a predetermined tension, and as a result, the performance of the color cathode ray tube can be exhibited as designed. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIGS. 3A and 3B are explanatory diagrams of operations in the embodiment.

FIGS. 4A and 4B are side views of main parts showing other embodiments of the present invention.

FIG. 5 is a perspective view of main parts showing another embodiment of the present invention.

FIG. 6 is a configuration diagram of a color cathode ray tube.

FIG. 7 is a perspective view showing a conventional example.

FIG. 8 is a perspective view of main parts showing a conventional example.

FIG. 9 is a diagram showing the load position when the long sides of the frame are pinched and compressed.

[Explanation of symbols]

(1) Color selection electrode device (2), (3), (4), (5), (6) Deployment spring pieces (21), (22) Frame (25) Frame (26) Color selection electrode (27) ) Electrode tension opening surface

Claims (1)

[Claims] Claim 1: By connecting the ends of a pair of U-shaped frames with a spring material, a rectangular frame with the connected portion as a short side is formed, and an opening surface of the frame for electrode extension is formed. A color selection electrode for a color cathode ray tube, comprising a color selection electrode made up of a large number of strip elements, stretched under tension between opposing long sides of the frame by the elastic force of the spring material. In the device, as the spring material,
When compressing the opposing long sides of the above frame,
The short side of the frame is bent with the electrode tension opening facing inside, and a deployable spring piece is provided that tensions the color selection electrode by deploying the bent short side of the frame when released. Characteristic color selection electrode device for color cathode ray tubes.