JP3221010B2 - Cathode ray tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic connection for supplying high pressure.
The present invention relates to a cathode ray tube having a built-in body .

[0002]

2. Description of the Related Art Conventionally, there is known a projector which concentrates respective images from three monochromatic cathode ray tubes corresponding to red, green and blue on a screen through a lens system, and enlarges and projects them to obtain a desired color image. Have 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 formed, and a monochromatic fluorescent surface 3 on the inner surface of the panel 1 and a metal A back layer 4 is formed, and an electron gun 5 is arranged opposite to the fluorescent screen 3. On the other hand, an elastic connector 8 for supplying high voltage is fitted to an anode button 7 embedded in a funnel 6, and the elastic connector 8 is provided. The high-pressure from the anode button 7 is supplied to the fluorescent screen 3 by bringing the tip of 8 into contact with the metal back layer 4 on the inner surface of the panel 1. 9 is panel 1
2 shows a cooling device filled with a cooling liquid disposed in front of the cooling device.

[0004] On the other hand, development of miniaturization of the projector, that is, reduction of the depth of the projector has been promoted. At the same time, the effective screen is being enlarged. For this purpose, as shown in FIG. 8, for example, the inner surface of the panel 1 is formed into a curved surface 10 protruding inward, and the distal end of the elastic connector 8 for supplying high pressure is extended to the inner surface of the skirt portion 1A of the panel 1. It is considered that the high-pressure supply to the fluorescent screen 3 is performed in contact with the fluorescent screen 3. According to this configuration, the 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 high-voltage supply elastic connecting body 8 comes into contact with the inner surface of the skirt portion of the panel 1, the effective screen can be enlarged as compared with the configuration of FIG.

[0005]

When the anode button 7 is buried in the panel 6 of the cathode ray tube, it is desirable to reduce the thickness of the glass in the buried portion in order to avoid thermal stress. . Therefore, conventionally, the anode button 7 is buried by reducing the thickness of the glass in the buried portion and melting it by heating. Therefore, the accuracy of the thickness of the glass in the embedded portion of the anode button 7 is not obtained. When the elastic connector 8 shown in FIG. 8 is fitted to such an anode button 7 and its front end 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 mounted on the anode button 7,
The distal end portion of the elastic connector 8 is separated from the inner surface of the skirt portion of the panel 1, which causes inconvenience such that high-pressure supply cannot be performed.

[0006] In view of the above problems, a cathode which is adapted to fit fixing position to the anode button of the elastic connector so as to be accurately regulated, can be reliably performed a high pressure supply to the phosphor screen
A wire tube is provided.

[0007]

According to the present invention, there is provided an elastic connector 23 which is fitted to an anode button 21 and whose tip abuts on the conductive layers 17 and 18 in the tube 20 to supply a high voltage to the fluorescent screen 16. A cathode ray tube having the anode of the tube body 20;
The buried portion of the button 21 is formed thin, and abuts on the surface of the tube body 20 where the thickness does not change via the elastic connecting body 23.
Then, a regulating member 26 for regulating a fitting position to the anode button 21 is attached.

[0008]

[0009]

According to the present invention, the restricting member which is brought into contact with the surface of the tube body 20 whose thickness does not fluctuate via the elastic connecting member 23 and regulates the fitting position to the anode button 21 is connected to the elastic connecting member.
23, when the elastic connector 23 is fitted to the anode button 21 embedded in the funnel, the elastic connector 23 is reinforced by the regulating member 26 and
Abuts against the surface of the funnel glass on the outer periphery of which the embedded portion of the anode button 21 is formed thin and the thickness of which does not fluctuate, and further insertion of the elastic connection body 23 is prevented. That is, the elastic connector 23 can be fitted to the anode button 21 at an appropriate position. Therefore, a high voltage can be reliably supplied to the conductive layers 17 and 18 extending to the inner surface of the skirt portion of the panel via the elastic connection body 23, and thus to the fluorescent screen 16.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a cathode ray tube (monochromatic cathode ray tube) for a projector according to the present embodiment, and FIG. In the figure, reference numeral 12 denotes a cathode ray tube main body, and reference numeral 13 denotes a liquid cooling device in which a cooling liquid disposed on the front surface of the panel 14 is sealed. The inner surface of the panel 14 has a curved surface 15 protruding inward as shown in FIG. A monochromatic fluorescent surface 16 is formed on the inner surface 15 of the panel 1, and a conductive carbon layer 17 is formed on the inner surface of the skirt portion 14A of the panel 14. The carbon layer 17 on the fluorescent surface 16 and the inner surface of the skirt portion 14A is formed. An overlying metal back layer 18 is formed. Reference numeral 19 denotes an electron gun arranged to face the fluorescent screen 16. On the other hand, an anode button 21 for supplying high pressure 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 smaller than in the other portions. The elastic connector 23 according to the present embodiment is mounted on the anode button 21.

The elastic connector 23 has an insertion hole 24 for the anode button 21 at the base thereof and a curved contact portion 25 at the tip thereof which contacts the metal back layer 18 on the carbon layer 17. A restricting member to be described later, that is, a cap member 26 is integrally fixed to the base side thereof. As shown in FIG. 3, the elastic connecting body 23 has a fan-shaped connecting piece 29 that is in contact with the interior carbon 28 on the base side, is divided into a plurality of pieces, is integrally formed, and is formed on the carbon layer 17 on the side that is in contact with the metal back layer 18. Are formed into a plurality of connection pieces 30. The shape of the abutting portion 25 of each connection piece 30 is shown in FIG. 4 (side view as viewed from the direction A) and FIG.
(A cross-sectional shape on line B). Therefore, the contact portion 25 contacts the metal back layer 18 of the skirt portion 14A by line contact.

The elastic connector 23 has a thickness of, for example, 0.13.
mm SUS304. In addition, 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 disposed on the elastic connector 23 so as to cover the insertion hole 24 of the elastic connector 23, and the flange portion 31
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 a portion of the funnel glass having a large thickness that is not deformed on the outer periphery in a state where the elastic connector 23 is fitted to the anode button 21.

As shown in FIG. 6, the anode button 21 has a vertical portion 33 into 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 configuration, since the cap member 26 is integrally fixed to the base of the elastic connector 23 fitted to the anode button 21, 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 is substantially rigid, and the rigid portion abuts on the inner surface of the funnel glass having a large thickness so that the outer periphery of the anode button 21 is not deformed. 23 is prevented from being inserted. That is, the insertion of the elastic connector 23 into the anode button is restricted by the cap member 26, and the elastic connector 23 is
5 is fitted at an appropriate position with respect to the anode button 21 so as to reliably 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.

Although the cathode ray tube for a projector has been described in the above example, 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 position of the elastic connector, which is fitted to the anode button and supplies a high voltage to the fluorescent screen, can be precisely regulated to the anode button. A high cathode ray tube can be provided. Therefore, the present invention can be suitably applied to, for example, a cathode ray tube for a projector.

[Brief description of the 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 a cap member-integrated elastic connection body according to the present invention.

FIG. 4 is a side view seen from a direction A in FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a 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 Phosphor screen 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 (1)

(57) [Claims] 1. A cathode ray tube having an elastic connector fitted to an anode button and having a tip abutting on a conductive layer in the tube to supply a high voltage to a fluorescent screen, wherein the embedded portion of the tube has the anode button embedded therein. Thinly formed
It is, through the elastic connection member on the surface does not vary the thickness of the tube
A cathode ray tube to which a regulating member for regulating a fitting position to the anode button is attached.