JPH0574375A - Cathode-ray tube and elastic connector for high voltage feed - Google Patents

Abstract

PURPOSE:To properly fit an elastic connector for supplying a high voltage to the fluorescent screen of a cathode-ray tube to an anode cap. CONSTITUTION:In a cathode-ray tube having an elastic connector 23 fitted to an anode button 21 to supply a high voltage to a fluorescent screen 16 by the contact of a top end 25 with conductive layers 17, 18 in a tube body, a cap material 26 for regulating the fitting to the anode button 21 is mounted on the elastic connector 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube and a high-voltage supply elastic connector incorporated therein.

[0002]

2. Description of the Related Art Conventionally, there has been known a projector in which images from three monochromatic cathode ray tubes corresponding to red, green and blue are concentrated on a screen through a lens system and enlarged and projected to obtain a desired color image. Has been.

As a cathode ray tube used in this projector, for example, as shown in FIG. 7, a tube body 2 having a flat panel 1 is constructed, and the inner surface of the panel 1 has a monochromatic fluorescent surface 3 and a metal on it. The back layer 4 is formed, the electron gun 5 is arranged so as to face the fluorescent surface 3, and the elastic connector 8 for high voltage supply is fitted to the anode button 7 embedded in the funnel 6, and the elastic connector The tip of 8 is brought into contact with the metal back layer 4 on the inner surface of the panel 1 to supply the high voltage from the anode button 7 to the fluorescent surface 3. 9 is panel 1
2 shows a cooling device in which a cooling liquid placed in front of is enclosed.

On the other hand, development of downsizing of the projector, that is, thinning of the depth of the projector is underway. At the same time, the effective screen is being expanded. For this reason, for example, as shown in FIG. 8, a metal back layer in which the inner surface of the panel 1 is a curved surface 10 protruding inward and the tip of the elastic connection body 8 for supplying high voltage is extended to the inner surface of the skirt portion 1A of the panel 1. It is conceivable that the high pressure supply to the fluorescent surface 3 is made by abutting against the surface 4. According to this configuration, a lens effect is obtained by the curved surface 10 of the panel 1 itself, and the focal length of the entire lens system is shortened, so that the optical path length from the cathode ray tube to the screen is shortened and the depth of the projector can be shortened. .. Further, since the elastic connection body 8 for high voltage supply contacts the inner surface of the skirt portion of the panel 1, the effective screen can be enlarged as compared with the configuration of FIG. 7.

[0005]

By the way, when the anode button 7 is embedded in the panel 6 of the cathode ray tube, it is desirable to reduce the thickness of the glass in the embedded portion in order to avoid thermal stress. .. Therefore, conventionally, the anode button 7 is buried by thinning the glass in the buried portion and heating and melting. Therefore, the thickness of the glass in the buried portion of the anode button 7 is not accurate. When the elastic connector 8 shown in FIG. 8 is fitted to such an anode button 7 and the tip end thereof is brought into contact with the inner surface of the skirt portion of the panel 1, the fitting position of the elastic connector 8 to the anode button 7 is set. Cannot be regulated accurately. That is, since the thickness of the glass varies, for example, when the elastic connector 8 is deeply attached to the anode button 7,
The tip end of the elastic connection body 8 separates from the inner surface of the skirt portion of the panel 1, which causes inconvenience that high-pressure supply cannot be performed.

In view of the above point, the present invention makes it possible to accurately regulate the fitting position of the elastic connection body to the anode button, and to surely supply high voltage to the fluorescent surface, and a high-voltage cathode ray tube. An elastic connector for supply is provided.

[0007]

DISCLOSURE OF THE INVENTION According to the present invention, a cathode wire having an elastic connector 23 fitted to an anode button 21 and having a tip abutting on the conductive layers 17 and 18 in the tube body to supply a high voltage to the fluorescent surface 16. In the tube, a regulating member 26 for regulating the fitting position of the anode button 21 is attached to the elastic connection body 23.

The present invention fits on the anode button 21,
The tip contacts the conductive layers 17 and 18 in the tubular body, and the fluorescent surface 16
In the elastic connection body 23 that applies a high voltage to the anode button 21, the base portion of the elastic connection body 23 that is fitted to the anode button 21 is fixed with a regulation member 26 that regulates the fitting position to the anode button 21.

[0009]

In the present invention, the elastic connecting body 23 is fitted to the anode button 21 embedded in the funnel by attaching the regulating member 26 for regulating the fitting position to the anode button 21 to the elastic connecting body 23. At this time, the surface of the elastic connection body 23, which is reinforced by the regulation member 26, contacts the surface of the funnel glass in which the thickness of the outer periphery of the funnel glass in which the anode button 21 is embedded does not change,
Further insertion of the elastic connection 23 is prevented. That is, the elastic connector 23 can be fitted to the anode button 21 at an appropriate position. Therefore, it is possible to reliably supply the high voltage to the conductive layers 17 and 18 extending to the inner surface of the skirt portion of the panel, that is, the fluorescent surface 16 through the elastic connection body 23.

[0010]

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

FIG. 1 shows a cathode ray tube for a projector (monochromatic cathode ray tube) according to this embodiment, and FIG. 2 shows an enlarged main part thereof. In the figure, 12 is a cathode ray tube main body, and 13 is a liquid cooling device arranged on the front surface of the panel 14 and in which a cooling liquid is sealed. The inner surface of the panel 14 has a curved surface 15 protruding inwardly as shown in FIG. A monochromatic fluorescent surface 16 is formed on the inner surface 15 of the panel 1, a conducting carbon layer 17 is formed on the inner surface of the skirt portion 14A of the panel 14, and a carbon layer 17 on the fluorescent surface 16 and on the inner surface of the skirt portion 14A. The metal back layer 18 extending over is formed. Reference numeral 19 is an electron gun arranged so as to face the fluorescent surface 16. On the other hand, an anode button 21 for supplying high voltage is embedded in the funnel 20. In this case, the thickness of the funnel glass in the portion where the anode button 21 is embedded is thinner than the other portions. The elastic connector 23 according to the present embodiment is attached to the anode button 21.

The elastic connector 23 has an insertion hole 24 for inserting it into the anode button 21 at its base and a curved contact portion 25 for contacting the metal back layer 18 on the carbon layer 17 at its tip. The cap member 26, which will be described later, is integrally fixed to the base portion of the cap member 26. As shown in FIG. 3, the elastic connecting body 23 has a fan-shaped connecting piece 29 that abuts against the internal carbon 28 on the base side and is integrally formed by being divided into a plurality of parts. The elastic connecting body 23 comes into contact with the metal back layer 18 on the carbon layer 17. A plurality of divided connection pieces 30 are formed on each of the connection pieces 30, and the shape of the contact portion 25 of each connection piece 30 is as shown in FIG.
It is formed as shown in the sectional shape on line B). Therefore, the contact portion 25 comes into line contact with the metal back layer 18 of the skirt portion 14A.

The elastic connecting member 23 has, for example, a thickness of 0.13.
It is formed of SUS304 of mm. Also, the cap material 2
6 is formed in a cup shape having a flange portion 31 and is formed of, for example, SUS304 having a thickness of 0.5 mm. The cap member 26 is arranged on the elastic connection body 23 so as to cover the insertion hole 24 of the elastic connection body 23, and the flange portion 31 thereof is provided.
And the elastic connection body 23 are spot-welded and integrated.
In this case, the flange portion 31 of the cap member 26 is formed to have a size corresponding to the thick-walled funnel glass portion that is not deformed on the outer periphery when the elastic connection body 23 is fitted to the anode button 21.

As shown in FIG. 6, the anode button 21 includes a vertical portion 33 to which the elastic connecting member 23 is fitted, a conical portion 34 extending from the vertical portion 33 and gradually expanding, and a conical portion 34. And a flange portion 35 extending from the upper edge.

According to the above-mentioned structure, the cap member 26 is integrally fixed to the base portion of the elastic connector 23 which is fitted to the anode button 21, so that when the elastic connector 23 is fitted to the anode button 21. The portion of the cap member 26 corresponding to the flange portion 31 becomes substantially rigid, and the rigid portion abuts the inner surface of the funnel glass having a large thickness so that the outer peripheral thickness of the anode button 21 is not deformed, and further elastic connecting body is provided. The insertion of 23 is blocked. That is, the insertion of the elastic connecting body 23 into the anode button is restricted by the cap member 26, and the elastic connecting body 23 has the contact portion 2 at the tip thereof.
5 is fitted to the anode button 21 at a proper position so as to surely contact the metal back layer 18 on the carbon layer 17 on the inner surface of the panel skirt portion 14A. Therefore, a cathode ray tube for a projector having a large effective screen and high reliability can be obtained.

In the above example, the cathode ray tube for the projector has been described, but the elastic connector 23 according to the present invention can be applied to other ordinary cathode ray tubes.

[0017]

According to the present invention, the fitting position of the elastic connection body fitted to the anode button and supplying a high voltage to the fluorescent surface to the anode button can be accurately regulated, so that the reliability is improved. A high cathode ray tube can be provided. Therefore, it is suitable for application to, for example, a cathode ray tube for a projector.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an example of a cathode ray tube according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a plan view of an elastic connector integrated with a cap member according to the present invention.

FIG. 4 is a side view seen from the direction A in FIG.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a cross-sectional view of an anode button.

FIG. 7 is a configuration diagram showing an example of a conventional cathode ray tube for a projector.

FIG. 8 is a configuration diagram showing a comparative example of a cathode ray tube for a projector.

[Explanation of symbols]

 1, 14, Panel 5, 19 Electron gun 6, 20 Funnel 3, 16 Fluorescent surface 4, 18 Metal back layer 8, 23 Elastic connector 7, 21 Anode button 9, 13 Liquid cooling device 17 Carbon layer 26 Cap material

Claims (2)

[Claims] 1. A cathode ray tube having an elastic connection body fitted to an anode button and having its tip abutted against a conductive layer in the tube body to supply a high voltage to a fluorescent surface, wherein the elastic connection body is fitted to the anode button. A cathode ray tube in which a regulating member that regulates the attachment position is attached. 2. An elastic connector which is fitted to the anode button and whose tip is in contact with a conductive layer in the tubular body to supply a high voltage to a fluorescent surface, wherein a base part of the elastic connector which is fitted to the anode button is used. An elastic connector for high-voltage supply, to which a restricting member for restricting the fitting position on the anode button is fixed.