JPH06236735A - Color selecting mechanism for cathode-ray tube and its assembling method - Google Patents

Abstract

PURPOSE:To provide a color selecting mechanism for a cathode-ray tube capable of preventing the discharge at operation to improve reliability and breakdown voltage characteristic, and its assembling method. CONSTITUTION:An elastic member 9 constituting the frame of a color selecting mechanism has a hole 15 of a determined dimension. A damper spring 13 is curved to protrude a mounting part 13a. The mounting part 13a has a clip structure. The mounting part 13a of the damper spring 13 is inserted to the hole 15 of the elastic member 9 to fix the damper spring 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color selecting mechanism for a cathode ray tube used in, for example, a color picture tube and an assembling method thereof.

[0002]

2. Description of the Related Art Conventionally, a so-called aperture grill as shown in FIG. 4 has been used as a color selecting mechanism for a color cathode ray tube. The color selecting mechanism 20 has a metal frame 23 composed of a pair of supporting members 21 facing each other and U-shaped elastic members 22 supporting both ends of the supporting members 21, and a metal frame 23 serving as a mask is provided between the supporting members 21. An aperture grill plate 24 made of a thin plate is stretched and configured. The aperture grill plate 24 is provided with a large number of thin strip-shaped grid elements 24a with a predetermined pitch so as to form a large number of slits (beam transmission holes) 24b. On the other hand, on the surface of the grid element body 24a of the aperture grill plate 24, in order to prevent the grid element body 24a from resonating due to external vibration and causing color shift,
A damper wire 25 for preventing vibration is stretched. The damper wire 25 is made of, for example, a thin wire made of tungsten, and is fixed to the elastic member 22 of the frame 23 by spot welding (welding point 27) or the like via a damper spring 26 which is an elastic support piece.

[0003]

However, in the case of such a conventional example, since the damper spring 26 is fixed by welding, the following problems occur. That is, for example, at the time of welding such as spot welding, the elastic member 2
2, depending on the surface roughness, flatness and welding conditions, splash (foreign matter caused by sparks during welding) 2
8 is generated, but the cathode ray tube is in a state in which a high voltage (20 to 35 KV) is applied inside during operation, so such a splash 28 causes discharge during operation,
As a result, there is a problem that the breakdown voltage of the cathode ray tube is not stable and the reliability is poor.

The present invention has been made in view of the above points of the conventional example, and an object of the present invention is to provide a color selecting mechanism for a cathode ray tube capable of preventing discharge during operation and improving reliability and withstand voltage characteristics. It is to provide the assembling method.

[0005]

A color selecting mechanism for a cathode ray tube according to the present invention, as shown in FIGS. 1 to 3, has a plurality of grid elements 10a mounted on a metal frame 8 and the grid elements 10a. In the color selecting mechanism of the cathode ray tube, in which the damper wire 12 for vibration prevention is stretched on the body 10a via the elastic piece 13, the elastic piece 13 is provided with a mounting portion 13a having a spring-like clip structure. It is characterized by. Further, in the method of the present invention, the opening 15 is formed in the metal frame 9 and the mounting portion 13a having the spring-like clip structure is projected on the elastic piece 13, and the mounting portion 13a is inserted into the opening 15 described above. The elastic piece 13 is fixed.

[0006]

According to the present invention having such a structure, since the welding method is not used, splash due to welding sparks does not occur at the time of assembly, and as a result, discharge does not occur even when a high voltage is applied during operation. I can't. In addition, the elastic piece 13
Since the mounting portion 13a having a spring-like clip structure is projected to the inside and the mounting portion 13a is inserted into the opening 15 formed in the metal frame 9 to fix the elastic piece 13, the elastic piece 13 can be easily attached to the metal frame. It is attached to 9.

[0007]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 2 shows the overall structure of a color cathode ray tube to which this embodiment is applied. As shown in the figure, the cathode ray tube 1 has a funnel 2 made of glass.
The panel 3 constitutes a tube body, and the color selection mechanism 4 and the internal magnetic shield 5 described later are arranged in the tube body.

A phosphor layer 6 is formed on the inner surface of the panel 3. Further, the color selection mechanism 4 is supported by the support pins 7 provided on the skirt portion 3 a of the panel 3. On the other hand, inside the neck portion 2a of the funnel 2, an electron gun (not shown) for emitting and accelerating electrons according to a predetermined video signal is arranged.
The internal magnetic shield 5 is a metal plate for preventing mislanding of electrons due to the influence of the earth's magnetism, and is fixed to the color selection mechanism 4 described above.

FIG. 3 shows the overall structure of the color selection mechanism 4 according to this embodiment. As shown in the figure, the color selection mechanism 4 of this embodiment is a so-called aperture grill, and
A pair of supporting members 8 facing each other and a metal frame 10 composed of U-shaped elastic members 9 supporting both ends thereof are provided, and an aperture grill plate 11 made of a thin metal plate as a mask is provided between these supporting members 8. Is constructed and constructed. On this aperture grill plate 11, a large number of thin strip-shaped grid elements 11a are formed on a large number of slits (beam transmission holes) 11b.
To be formed with a predetermined pitch.

On the other hand, on the surface of the grid element body 11a of the aperture grill plate 11, a vibration-proof damper wire 12 is stretched as in the conventional example. The damper wire 12 is a thin wire made of, for example, tungsten and is fixed to the elastic member 9 of the frame 10 via a damper spring 13 described later.

A support spring 14 for attaching the color selecting function 4 to the panel 3 of the cathode ray tube 1 is attached to the side surface of each support member 8 and the elastic member 9.

FIG. 1A shows a mounting portion of the damper spring 13. As shown in the figure, in this embodiment, a rectangular hole 15 is provided on the side surface of the elastic member 9 of the frame 10. Two holes 15 are provided near each end of each elastic member 9. Since the elastic member 9 processes the hole 15, it is preferable that the elastic member 9 has a pipe structure made of a drawing material or a press-molded structure made of a flat plate.

On the other hand, as shown in FIG. 1A, the damper spring 13 is made of an elongated plate-like elastic member as in the prior art, but its middle abdominal part is bent and attached so as to project in the direction pulled by the damper wire 12. The part 13a is formed. The mounting portion 13a is formed in a substantially arrow shape, and its width is larger than the width of the hole 15 provided on the side surface of the elastic member 9. With such a configuration, the mounting portion 13a of the damper spring 13 has a function as a clip.

When the damper spring 13 is attached to the elastic member 9 of the frame 10, as shown in FIG. 1A, the attaching portion 13a is aligned with the hole 15 of the elastic member 9 and is pushed in the direction of the arrow so that it is inserted into the hole 15. To insert. As a result, as shown in FIG. 1B, the mounting portion 13a of the damper spring 13 and the elastic member 9 engage with each other, and the damper spring 13 is fixed to the side surface of the elastic member 9.

In this embodiment having such a configuration,
Since the welding method is not used, the above-mentioned splash does not occur, and as a result, no discharge is caused even when a high voltage is applied during operation. Therefore, according to this embodiment, the reliability of the cathode ray tube 1 can be improved and the withstand voltage characteristic can be improved. Further, according to the assembling method of the present embodiment, the damper spring 13 can be easily attached to the elastic member 9 of the frame 10, so that the production efficiency can be improved.

The present invention is not limited to the above-mentioned embodiment, but the size and shape of the hole of the elastic member can be arbitrary, and the size of the mounting portion of the damper spring can be adjusted accordingly. The size and shape can be arbitrary. Further, the openings are not limited to holes, but may be slit-shaped, or a plurality of openings may be provided. As described above, in the present invention, various types can be used as long as the mounting portion of the damper spring has a male structure and the opening of the elastic member has a female structure.

[0018]

As described above, according to the present invention, since the elastic piece for tensioning the damper wire is provided with the mounting portion having the spring-like clip structure, the elastic piece is elastic without using the welding method. One piece can be fixed, and as a result, discharge during operation of the cathode ray tube can be prevented and reliability and withstand voltage characteristics can be improved. Further, according to the assembly method of the present invention, the elastic piece can be easily attached to the metal frame,
The production efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view and a sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an entire cathode ray tube to which the present invention is applied.

FIG. 3 is a perspective view showing an entire color selection mechanism of this embodiment.

FIG. 4 is a perspective view showing an entire color selection mechanism according to a conventional example. B is a perspective view showing a main part of the conventional example.

FIG. 5 is a perspective view showing a method of mounting a damper spring of a conventional example.

[Explanation of symbols]

 4 Color selection mechanism 8 Support member 9 Elastic member 10 Frame 11 Aperture grill plate 11a Grid element body 11b Slit 12 Damper wire 13 Damper spring 13a Mounting part 15 hole

Claims (2)

[Claims] 1. A color selection mechanism for a cathode ray tube, comprising a plurality of grid elements mounted on a metal frame, and damper wires for vibration prevention stretched on the grid elements through elastic pieces, A color selection mechanism for a cathode ray tube, wherein the elastic piece is provided with a mounting portion having a spring-like clip structure. 2. An opening is formed in a metal frame, and a mounting portion having a spring-like clip structure is projected from the elastic piece, and the mounting portion is inserted into the opening to fix the elastic piece. The method for assembling a color selection mechanism for a cathode ray tube according to claim 1.