JP2980717B2 - Resistor for cathode ray tube, electron gun and cathode ray tube using this resistor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube resistor provided in a cathode ray tube such as a color cathode ray tube, and a resistor for the same.
The present invention relates to an electron gun and a cathode ray tube using an antibody .

[0003]

2. Description of the Related Art Generally, as shown in FIG. 4, a color cathode ray tube has a panel 1 and an envelope composed of a funnel 2 integrally joined to the panel 1, and a three-color phosphor layer is formed on the inner surface of the panel 1. A phosphor screen 3 is formed, and a shadow mask 4 having a large number of electron beam passage holes is disposed inside the phosphor screen 3 so as to face the phosphor screen 3. An electron gun 7 for emitting three electron beams 6B, 6G, 6R is arranged in the neck 5 of the funnel 2. Then, the electron beams 6B, 6G, 6R emitted from the electron gun 7 are deflected by a magnetic field generated by a deflection yoke 8 mounted outside the funnel 2 to scan the phosphor screen 3 horizontally and vertically. Accordingly, the phosphor screen 3 is formed in a structure for displaying a color image.

The electron gun 7 has three cathodes, three heaters for individually heating the cathodes, and controls electron emission from the cathodes and accelerates and focuses the electron beams 6B.
, 6G, 6R, and electrodes for accelerating and focusing the electron beams 6B, 6G, 6R toward the phosphor screen 3. Finally, the electron beams 6B and 6G are directed toward the phosphor screen 3.
, 6R are accelerated and focused, the final accelerating electrode has an anode high voltage of about 25 to 30 kV, and the focusing electrode has a medium voltage of about 5 to 8 kV, which is relatively higher than other electrodes. Is applied.

Normally, the voltage of each electrode of the electron gun 7 is, except for the electrode to which the anode high voltage is applied, a plurality of electrodes that hermetically penetrate the stem 10 sealing the end of the neck 5. Is supplied via the stem pin 11. However, if the voltage supplied through the stem pin 11 includes a relatively high intermediate voltage such as the voltage applied to the focusing electrode, the interval between the stem pins 11 is small, and thus the stem 10 and the stem pin The withstand voltage of a socket or the like connected to the socket 11 becomes a problem, and the structure of the socket is particularly complicated.

For this reason, a means for arranging a resistor in the neck along the electron gun and dividing the anode high voltage by the resistor to obtain a medium voltage is disclosed in Japanese Utility Model Laid-Open Publication No. 48-21561. JP-A-55-38484, U.S. Pat.
No. 32,786, U.S. Pat. No. 4,143,298
It is shown in the specification of the issue.

FIG. 5 shows an example of a resistor disposed in the cathode ray tube. This resistor includes a thin rectangular ceramic insulating substrate 14 having a plurality of openings formed therethrough and a low-profile formed around the opening on one surface of the insulating substrate 14. A terminal extraction portion 15 for a resistor, a high resistance pattern 16 formed in a meandering shape between the terminal extraction portions 15 on one surface of the insulating substrate 14, a thin insulating layer 17 covering the high resistance pattern 16, It consists of a metal connection piece 18 such as an eyelet fitted into the hole and fixed by caulking to the insulating substrate 14. The metal connecting piece 18 is for connecting to a predetermined electrode of the electron gun or the like. An annular flange 19 is formed at one end of a cylindrical base fitted into the opening. As shown in FIG. 6, a pair of bent portions 21 symmetrically bent toward the base 20 at an angle of about 20 ° are formed. It is formed in the structure which does.

Such a resistor has a thickness of 1 mm, for example.
1mm diameter on ceramic insulation board 8mm wide and 66mm long
A low-resistance material containing, for example, ruthenium oxide as a main component is applied in a predetermined shape around the opening on one surface, and a high-resistance material obtained by mixing glass powder with ruthenium oxide, for example. Is applied in a predetermined pattern, and then sintered to form a terminal extraction portion and a high-resistance pattern. Then, glass is applied on the high resistance pattern to a thickness of about 200 mm and sintered to form an insulating layer. Thereafter, it is formed into a cylindrical shape of about 1 mm in diameter and about 2 mm in length with a flange part of about 2.2 mm in diameter formed at one end. It is manufactured by fitting a metal connecting piece having a bent portion formed therein into an opening of an insulating substrate and caulking.

[0009]

As described above, a resistor provided in a cathode ray tube such as a color cathode ray tube is a thin ceramic insulating substrate having a plurality of openings formed through a plate surface. A low-resistance terminal extraction portion is formed around the opening on one surface of the substrate, a high-resistance pattern is formed between the terminal extraction portions, and the opening of the insulating substrate is connected to a predetermined electrode of an electron gun or the like. Metal connecting pieces are fixed by caulking.

By the way, an anode high voltage is applied to this resistor through a metal connection piece, the anode high voltage is divided, and a predetermined voltage is applied to a predetermined electrode of the electron gun through another metal connection piece. In order to supply, it is important to ensure the conductive connection of the metal connecting piece that makes mechanical contact (pressure contact) with the terminal outlet.

However, in the conventional resistor, a pair of bent portions are formed symmetrically on an annular flange formed at one end of the metal connection piece, and the bent portions are pressed against the terminal extraction portion. As a result, there is a problem that the connection becomes unstable because the structure is conductively connected to the terminal extraction portion, a predetermined voltage is not applied to a predetermined electrode of the electron gun, and a focus defect occurs.

That is, in the resistor having the above-described structure, it is desired that the metal connecting piece and the terminal extracting portion be brought into contact with each other over a wide area in order to surely electrically connect the terminal extracting portion and the metal connecting portion. Therefore, for this purpose, it is necessary to strengthen the caulking of the metal connection piece with respect to the insulating substrate. However, if the caulking is strengthened, cracks and cracks occur in the fragile insulating substrate having a small thickness. Conversely , if you weaken the caulking ,
Although cracks and cracks do not occur, the metal connecting piece floats up with respect to the terminal take-out portion, and the contact between the terminal take-out portion and the metal connecting piece becomes a point contact, which is likely to cause connection failure. That is,
In the resistor having the conventional structure, there is a problem that it is extremely difficult to stably and surely conductively connect the terminal extraction portion and the metal connecting piece without generating a crack or a crack in the insulating substrate.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to form a stable and reliable conductive connection between a terminal extraction portion and a metal connecting piece to constitute a highly reliable resistor. Aim.

[Configuration of the Invention]

[0015]

An insulating substrate having a plurality of apertures are formed to penetrate the plate surface Means for Solving the Problems], and the terminal lead-out portion of the low resistance formed on the opening around the one surface of the insulating substrate, this A high-resistance pattern formed between the terminal extraction portions on one surface of the insulating substrate, and one end of a base fitted into the opening and crimped on the insulating substrate; the flange portion is formed, the flange portion in the cathode ray tube resistor and a metal connecting piece for connecting conductive to the terminal take-out portion, and having two or more linear outer peripheral flange portion of the metal connecting piece ,
The straight line is separated from the straight outer peripheral edge by a predetermined distance.
At the part almost parallel to the outer peripheral edge of the
The base had a bent portion bent toward the base .

In addition, the electron gun is provided with the above-mentioned cathode ray tube resistor.
I got it.

Further, the cathode ray tube is provided with the above-mentioned electron gun.
And

[0018]

As described above, the flange portion of the metal connecting piece has two or more linear outer peripheral edges, and is substantially parallel to the linear outer peripheral edges at a predetermined distance from the linear outer peripheral edges.
When a shape having a bent portion formed by bending the outer peripheral portion of the flange portion on the base side portion, the metal connecting piece to the terminal take-out portion becomes a linear contact, even if the caulking metallic connecting piece to the insulating substrate is weak A stable and reliable conductive connection can be obtained.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings based on embodiments.

FIG. 1 shows a resistor arranged along an electron gun in a neck of a color cathode ray tube according to an embodiment of the present invention. This resistor is a thin rectangular ceramic insulating substrate 14 having a plurality of openings formed through the plate surface.
A low-resistance terminal extraction portion 15 mainly composed of ruthenium oxide formed around the opening on one surface of the insulating substrate 14; and a terminal extraction portion 15 on one surface of the insulating substrate 14.
A meandering high-resistance pattern 16 made of ruthenium oxide and glass powder formed between the high-resistance pattern 1
6 comprises a thin insulating layer 17 made of glass, and a metal connecting piece 30 fitted into each of the above holes and fixed to the insulating substrate 14 by caulking.

As shown in FIG. 2, the metal connection piece 30 is formed by forming an annular flange portion 32 at one end of a cylindrical base portion 31 fitted into an opening of the insulating substrate 14. The metal connection piece 30 of this example has an oval shape having a symmetrical linear outer peripheral edge 33 obtained by cutting a part of the outer peripheral edge of an annular flange portion 32 , and the linear outer peripheral edge thereof is formed.
33 ° about 20 ° at a predetermined interval parallel to 33
Is bent toward the base 31 side at an angle of? To form a bent portion 34 . The flange portion 32 has a lead wire connection portion 35 at an intermediate portion between the opposed linear outer peripheral edges 33.
Are formed to protrude.

More specifically, such a metal connecting piece 30 is formed by forming an annular flange portion having a diameter of 2.5 mm at one end of a cylindrical base portion having a diameter of about 1 mm, and forming the flange portion of the cylindrical base portion. It is cut in parallel at 1.1 mm from the center to form a linear outer peripheral edge, and 0.6 mm from the center of the cylindrical base.
It is obtained by bending about 20 ° to the cylindrical base side parallel to the linear outer peripheral edge at mm.

When the metal connecting piece 30 having the above shape is used, even if the insulating substrate 14 is crimped so weakly that cracks and cracks do not occur, the metal connecting piece 30 can be connected to the terminal extraction portion 1.
5 and at least linear contact with the linear outer peripheral edge 33 , and a stable and reliable conductive connection is obtained. Therefore, by using such a resistor, it is possible to prevent the deterioration of the focus characteristic which has conventionally occurred.

In the above embodiment, a part of the outer peripheral edge of the annular flange portion of the metal connecting piece is cut to form a symmetrical linear outer peripheral edge to form an oval shape. shape, as shown in Figures 3 (a) (d), a square <br/> shape 37 a, hexagonal 37 b, octagonal 37 c, the long axis direction end portion
What but a like truncated elliptical 37 d, thereby forming a bent portion 34 and bent in parallel to the site and the inside of the straight outer peripheral edge 33 spaced a predetermined distance from the straight outer edge 33 of the pair of opposed May be.

[0025]

According to the present invention, a low-resistance terminal extraction portion is formed around an opening on one surface of an insulating substrate in which a plurality of holes penetrating a plate surface are formed. The flange formed at one end of the metal connection piece fitted and caulked in the opening has two or more linear outer peripheral edges,
And at a predetermined distance from the linear outer peripheral edge,
If the outer peripheral part is bent to the base side at a part almost parallel to the edge, the line contact can be achieved even if the metal connection piece is weakly caulked to the insulating substrate, resulting in stable A reliable conductive connection can be obtained, and it is possible to prevent the deterioration of the focus characteristic of the cathode ray tube with a built-in resistor, which is conventionally caused by the unstable connection of the metal connecting piece to the terminal extraction portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a resistor according to an embodiment of the present invention.

FIG. 2 (a) is a view showing a shape of a flange portion of a metal connecting piece caulked into an opening of the insulating substrate, and FIG. 2 (b).
FIG. 4 is a view showing a connection structure of the metal connection piece to a terminal extraction portion.

3 (a) to 3 (d) are views showing different shapes of a flange portion of a metal connecting piece. FIG.

FIG. 4 is a diagram showing a configuration of a color cathode ray tube.

FIG. 5 is a perspective view showing a configuration of a conventional resistor.

FIG. 6 (a) is a view showing a shape of a flange portion of a metal connection piece caulked into an opening of an insulating substrate of the conventional resistor , and FIG. 6 (b) is a terminal extraction portion of the metal connection piece. FIG. 4 is a diagram showing a connection structure for the CAM.

[Description of References] 14 ... Insulating substrate 15 ... Terminal extraction part 16 ... High resistance pattern 17 ... Insulating layer 30 ... Metal connection piece 31 ... Cylindrical base 32 ... Flange 33 ... Linear outer peripheral edge 34 ... Bend

Claims (3)

(57) [Claims] 1. An insulating substrate having a plurality of openings penetrating a plate surface, a low-resistance terminal extraction portion formed around an opening on one surface of the insulating substrate, and one of the insulating substrates. A high resistance pattern formed between the terminal extraction portions on the surface of
In a cathode ray tube resistor, a flange portion is formed at one end of a base portion fitted to the opening and caulked to the insulating substrate, and the flange portion includes a metal connection piece electrically connected to the terminal extraction portion. The flange portion of the metal connection piece has two or more linear outer peripheral edges and is separated from the linear outer peripheral edge by a predetermined distance.
Outside the above flange at a location almost parallel to the straight outer peripheral edge
A resistor for a cathode ray tube, comprising a bent portion formed by bending a peripheral portion toward the base . 2. A cathode ray tube resistor according to claim 1.
An electron gun, characterized in that: 3. An electron gun according to claim 2 is provided.
The cathode ray tube to be featured.