JP2000223045A - Cathode-ray tube built-in resistance and cathode-ray tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a low resistant material from peeling off from a cathode- ray tube built-in resistance to cause spark discharge between electrodes or to be defects on a screen. SOLUTION: In this cathode-ray tube built-in resistance 16, a resistant pattern part 2 of high resistance in a zigzag shape, for example, is formed on an insulative substrate 1 such as ceramics. A low resistant electrode drawn part 3 coupled to the resistant pattern part 2 is formed on both end parts of the resistant pattern part 2, if necessary, on one, two or more middle parts. A cylindrical metal rivet 5 is inserted into an opening hole 4 disposed in a terminal drawn part 27 positioned near the electrode drawn part 3 but positioned different therefrom. A metal terminal 6 integrated with a connecting ribbon 7 is welded on the cylindrical end of the metal rivet 5 except flat part thereof. On a part of the metal terminal 6, a recessed part 8 is disposed so as to press-contact to the electrode drawn part 3 with a high contact pressure and to attain preferable electric connection characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a cathode ray tube used for a TV receiver or a computer display, and a cathode ray tube built-in resistor for supplying a predetermined voltage to electrodes in the tube.

[0002]

2. Description of the Related Art When a desired voltage cannot be directly supplied from the outside to a predetermined electrode in a cathode ray tube, a voltage is dropped from a higher voltage through a built-in resistor provided in the tube and applied to the electrode. Have been done.

For example, as a cathode ray tube built-in resistor for supplying a voltage to an electrode of an electron gun, as shown in FIG. 22, a high-resistance material such as ruthenium oxide is applied on a ceramic insulating substrate 1. In order to form a predetermined resistance pattern portion 2 and to supply a voltage to the built-in resistor by being connected to another electrode and to take out a voltage to be supplied to each electrode from the built-in resistor, a ruthenium oxide or the like is also used. There is known one in which a relatively low-resistance electrode lead-out portion 3 is formed in contact with a part of the resistance pattern portion 2. In the cathode ray tube built-in resistor, an eyelet-shaped metal element 41 is fitted into at least one opening provided in the electrode extraction section 3, and the metal element 41 is firmly connected to the electrode of the electron gun via the metal wire 42. (See Japanese Patent Application Laid-Open No. 61-147441).

[0004]

However, in the conventional cathode ray tube built-in resistor, when the metal element 41 is fixed to the electron gun electrode by a metal element, a large force is applied to the metal element. The low-resistance material to be formed may rub against each other and part of the low-resistance material may be peeled off. The low resistance material thus peeled off adheres to the electrode portion of the electron gun and causes sparking discharge due to the high voltage applied to the electrode of the electron gun during operation of the cathode ray tube. Further, when the peeled low-resistance material adheres to the screen portion of the picture tube, it hinders light emission of the phosphor formed on the screen portion, and causes a defect on the screen.

Further, in the conventional cathode ray tube built-in resistor, since the electrode extraction portion 3 is formed in contact with a part of the resistance pattern portion 2, the high voltage application in the knocking process performed in the manufacturing process of the cathode ray tube is performed. Sometimes, the resistance material is damaged at the contact portion between the resistance pattern portion 2 and the electrode extraction portion 3, and a desired resistance value cannot be obtained. In the worst case, the electrical connection between the resistance pattern portion 2 and the electrode extraction portion 3 becomes impossible. There has been a problem that conduction cannot be obtained.

Accordingly, the present invention can prevent the members forming the electrode take-out portion from peeling off, prevent the discharge and the screen defect from occurring when the picture tube is driven, and can prevent the occurrence of a screen defect even when a high pressure is applied in the knocking process. Another object of the present invention is to provide a cathode ray tube built-in resistor that can stably obtain a desired resistance value without causing damage to a resistance material at a contact portion between a resistance pattern portion and an electrode extraction portion.

[0007]

In order to solve this problem, a cathode ray tube built-in resistor according to the present invention has a resistance pattern portion and an electrode extraction portion formed on an insulating substrate, and the insulating substrate in the vicinity of the electrode extraction portion. Has a terminal attachment portion having at least one opening, and is fixed to a predetermined portion in the cathode ray tube via a metal terminal attached to the terminal attachment portion.

[0008] By doing so, even when a force is applied to the metal terminal, the metal terminal can prevent the member forming the electrode extraction portion from peeling off.

Further, the electrode extraction portion has a lower resistance value than the resistance pattern portion.

[0010] By doing so, the electrical connection with the metal terminal can be enhanced, and the resistance value can be stabilized.

It is desirable that the opening of the terminal mounting portion be non-circular. Further, it is desirable that the metal terminal is fixed to the insulating substrate in a portion other than the opening of the terminal mounting portion.

With this configuration, the metal terminal does not rotate around the opening, and the metal terminal and the insulating substrate can be more strongly mechanically connected.

Further, in the cathode ray tube built-in resistor of the present invention, a resistance pattern portion and an electrode extraction portion are formed on an insulating substrate, and the electrode extraction portion is formed of the same material as the material forming the resistance pattern portion. The high-resistance portion is formed by covering the high-resistance portion with a low-resistance portion formed of a material having a relatively lower resistance value than the material forming the resistance pattern portion.

By doing so, the contact area between the resistance pattern portion and the electrode extraction portion can be increased, and the resistance material generated at the contact portion between the resistance pattern portion and the electrode extraction portion when a high voltage is applied during knocking processing. Damage can be prevented.

In the cathode ray tube built-in resistor according to the present invention, the metal terminal is fixed to the insulating substrate through the opening.

By doing so, the metal terminals can be easily attached to the insulating substrate.

Further, the cathode ray tube built-in resistor according to the present invention comprises:
The metal terminal forms a closed circuit surrounding a part of the insulating substrate, or the metal terminal is bent so as to be along both the surface of the insulating substrate on the electrode extraction side and the surface on the opposite side. Features.

By doing so, the metal terminal can be fixed to the insulating substrate without using any components other than the metal terminal.

In the cathode ray tube built-in resistor of the present invention, a wedge is provided in a gap between the metal terminal and the insulating substrate inside the opening, or the metal terminal is located inside the opening. It is characterized by having projections.

By doing so, the metal terminals are firmly fixed to the insulating substrate without shifting.

Further, the cathode ray tube built-in resistor according to the present invention comprises:
The metal terminal has a crimped portion that is convex with respect to the surface of the insulating substrate on which the electrode extraction portion is formed or the opposite surface.

By doing so, the metal terminal is
It is easily and firmly fixed to the insulating substrate.

Further, a cathode ray tube according to the present invention is characterized in that a predetermined potential is supplied to an electrode in the tube by any one of the above-mentioned resistors incorporating a cathode ray tube.

By doing so, it is possible to prevent the occurrence of sparking discharge and defects on the screen due to the cathode ray tube built-in resistor, and to use the cathode ray tube built-in resistor having a desired resistance value. A cathode ray tube in which a desired voltage is stably supplied to the electrodes in the tube can be obtained.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cathode ray tube built-in resistor and a cathode ray tube having a built-in resistor according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 2 shows a cathode ray tube according to a first embodiment of the present invention.

The cathode ray tube according to the present embodiment has an envelope 1
2. The electron gun 14 and the shadow mask 15 mounted on the neck 13 of the envelope form a basic configuration. Here, the electron gun 14 has three cathodes 17 as shown in FIG.
(Only one is shown in the figure for convenience), a control electrode 18, an acceleration electrode 19, a first focusing electrode 20, a second focusing electrode 21,
A final accelerating electrode 22 and a convergence cup 23 are sequentially arranged, and are constituted by an insulating support 24 that supports these electrodes at predetermined intervals.

The cathode ray tube built-in resistor 16 according to the present embodiment is mounted on the side surface of the insulating support 24 of the electron gun, and an electrode extraction portion (not shown) of the cathode ray tube built-in resistor 16 is provided.
The connection ribbon 7 of a metal terminal attached to the first focusing electrode 20 is connected to the side surface (7a) of the convergence cup 23.
(7b) and the metal pin 25 (7c) at the end of the neck. In this way, the anode voltage (for example, 25 kV) supplied to the convergence cup 23 via the contact spring 26 is divided, and the desired focusing voltage (for example, 7 kV) is applied to the first focusing electrode 20.
V). The metal pin 25 is connected to an external ground, a variable resistor, or an appropriate power source via a cathode ray tube socket.

Here, the connection ribbon 7 has a function of fixing the cathode ray tube built-in resistor 16 on the insulating support 24 and a function of electrically connecting to each connection destination.

Next, the cathode ray tube built-in resistor 16 according to the present embodiment will be described in detail with reference to FIG.

As shown in FIG.
The resistor 16 with a built-in cathode ray tube is made of an insulating substrate 1 such as a ceramic.
For example, a zigzag resistance pattern portion 2 is formed thereon,
Electrode extraction portions 3 are formed at both end portions of the resistance pattern portion 2 and at one or more intermediate portions as necessary so as to be connected to the resistance pattern portion 2. Here, the resistance pattern portion 2
Is formed of a high-resistance resistance material obtained by mixing glass mainly with ruthenium oxide having a desired resistance value. Further, the electrode extraction portion 3 is formed of a resistance material having a relatively smaller resistance value than the resistance material forming the resistance pattern portion 2.

On the surface of the insulating substrate 1 on which the resistance pattern portion 2 is formed, adhesion of foreign matter to the resistance pattern portion, knocking in the cathode ray tube manufacturing process or resistance breakdown due to spark discharge during operation causes resistance pattern portion damage. An insulating thin film (not shown) is formed so as to cover the entire surface of the resistance pattern portion 2 except for the electrode extraction portion 3 and its vicinity.

In a preferred example of the present embodiment, the insulating substrate 1 has a thickness of 0.6 mm, a width of 7 mm, and a length of 55 mm.
As the high resistance material forming the resistance pattern portion 2, a resistance material made of lead ruthenate and glass having a sheet resistance of 4Ω / □ and the low resistance material forming the electrode extraction portion 3 having a sheet resistance value of 1 kΩ / □. The total resistance is set to 1000 MΩ using a resistance material made of lead ruthenate and glass. The insulating thin film covering the resistance pattern portion 2 is made of a mixture of silicon oxide, lead oxide, boron oxide and alumina, and has a thickness of about 20 μm.
It was set to 0 μm.

In the present embodiment, a hole is formed in a terminal mounting portion (indicated by reference numeral 27 in the figure for clarifying which portion is to be indicated) at a position different from the electrode extracting portion 3 in the vicinity of the electrode extracting portion 3. 4 are provided. And this terminal mounting part 2
A metal rivet 5 having a flat portion on one side is inserted into the opening 4 of the metal 7 and a metal terminal 6 integrated with the connection ribbon 7 is attached to an end of the cylindrical portion of the metal rivet 5 other than the flat portion. Welded. Then, a part of the metal terminal 6 includes an electrode extraction portion 3.
The convex portion 8 is provided so as to be able to press-contact with a high contact pressure to obtain suitable electrical connection characteristics.

In a preferred example of the present embodiment, the opening 4
Is 0.8 mm, and the outer periphery of the through hole and the electrode extraction portion 3
Was set to 1 mm. The metal rivet 5 is made of stainless steel and has a cylindrical portion having a diameter of 0.7 mm, a height of 0.7 mm, a flat portion having a diameter of 1.5 mm, and a thickness of 0.1 mm.
The metal terminal 6 has a thickness of 0.15 mm, the long side of 3.0 mm, the short side of 2.0 mm before bending the convex portion 8,
The width of the connection ribbon is 1.0 mm and is made of stainless steel.

According to the present embodiment, the metal terminal 6 and the electrode extraction portion 3 are in contact only with the projection 8 for making an electrical connection, and the cathode ray tube built-in resistor 16 is mounted on the electron gun 14. Even if a large force is applied to the connection ribbon 7 at this time, the low-resistance material forming the electrode extraction portion 3 does not peel off, so that the peeled low-resistance material causes sparking discharge and defects on the screen. It will not be. Also, a metal terminal 6,
The electrode take-out unit 3 can be reliably electrically connected.

In the present embodiment, the metal rivet 5 inserted into the opening 4 and the metal terminal 6 are joined by welding. However, the same effect can be obtained by crimping the end of the metal rivet 5 by crushing it. The shape of the metal rivet 5 which can be obtained is not limited to that shown in the present embodiment.

Further, in this embodiment, the shape of the electrode extraction portion 3 is rectangular, and the terminal mounting portion 27 is provided closer to the end of the insulating substrate 1 than the electrode extraction portion 3, but as shown in FIG. The electrode extraction portion 3 is formed in a U-shape, and a terminal mounting portion 27 is provided inside the electrode extraction portion 3.
Alternatively, as shown in FIG. 5, the electrode extraction portion 3 may be formed in a square shape, and the inside thereof may be used as the terminal attachment portion 27. In the case of those shown in FIGS. 4 and 5, the area of the contact portion between the metal terminal 6 and the electrode extraction portion 3 is increased by providing the protrusions 8 provided on the metal terminal 6 on both sides of the metal terminal 6 or the like. Thus, more stable electrical continuity can be obtained between the electrode extraction portion 3 and the metal terminal 6.

Further, in this embodiment, the opening 4 for attaching the metal terminal 6 to the insulating substrate 1 is circular, and the cylindrical portion other than the flat portion of the metal rivet 5 is cylindrical. As shown in FIG. 6, the opening 4 'may be formed in a square shape, and the cylindrical portion of the metal rivet 5' may be formed in a square pillar shape. By doing so, the connection ribbon 7 of the metal terminal 6 is formed.
Metal rivet 5 'does not rotate even if force is applied to
The connection between the metal terminal 6 and the electrode extraction portion 3 can be made more stable and strong. In this case, the shape of the cylindrical portion of the opening 4 'and the metal rivet 5' is not limited to a quadrangle, and the same effect can be obtained as long as it is a non-circular shape such as an elliptical shape or a pentagon or more polygon. Needless to say.

(Embodiment 2) FIGS. 7 to 9 are enlarged views showing one end of a cathode ray tube built-in resistor 16 according to a second embodiment of the present invention.

In these cathode-ray tube built-in resistors 16, a resistance pattern portion 2 and an electrode extraction portion 3 are formed on an insulating substrate 1 made of ceramic or the like, and the electrode extraction portion 3 and the metal terminal 6 are electrically connected. The metal substrate 6 is provided with the metal rivet 5 inserted through the opening 4 provided in the terminal mounting portion 27 and the insulating substrate 1 is provided.
Is the same as in the first embodiment.

The present embodiment differs from the first embodiment in that the metal terminal 6 is fixed to the insulating substrate 1 by a second means other than the metal rivet 5 penetrating the opening 4. .

FIG. 7 shows a second embodiment in which the second means is provided with a second opening 9 provided at a position opposite to the terminal mounting portion 27 with the electrode take-out portion 3 interposed therebetween, and inserted through this opening. It is composed of a metal terminal 6 and a second metal rivet 10 fixed by welding or the like. In this case, the second opening 9 and the second metal rivet 10 correspond to the opening 4 and the metal rivet 5 respectively.
And the same material.

8 and 9, the second means is such that a part of the metal terminal 6 is bent and fitted to the notch 11 provided at the end of the insulating substrate 1. 8, the notch 11 is provided also at the end in the short side direction of the insulating substrate, whereas the notch shown in FIG. 11 is provided in a position other than the end in the short side direction of the insulating substrate 1.

In the cathode ray tube built-in resistor according to the present embodiment, the metal terminals 6 fixed to the electrode extraction portion 3 by obtaining electrical continuity are fixed to the insulating substrate 1 at two places. The rotation of the metal terminal 6 can be more reliably prevented than in the first embodiment, and the metal terminal 6 can be more mechanically connected to the insulating substrate 1. As a result, the reliability of the electrical connection can be improved.

In the present embodiment, the opening 4 and the second opening 9, the metal rivet 5, and the cylindrical portion of the second metal rivet 10 have the same shape, and are circular and cylindrical. However, as shown in FIG. 6, the opening 4 or the second opening 9 may be made non-circular, and the cylindrical portion of the metal rivet 5 or the second metal rivet 10 may have a shape corresponding to this. it can.

Further, it goes without saying that the shape and position of the electrode take-out portion are not limited to those shown in the drawings.

(Embodiment 3) Next, a third embodiment of the cathode ray tube built-in resistor of the present invention will be described with reference to FIG.

The cathode ray tube built-in resistor 16 of the present embodiment.
Has a resistance pattern portion 2 and an electrode extraction portion 3 formed on an insulating substrate 1 made of ceramics or the like, the electrode extraction portion 3 and the metal terminal 6 are electrically connected, and the metal terminal 6 is connected to the terminal mounting portion. 27 is the same as that of the first embodiment in that it is fixed to the insulating substrate 1 by a metal rivet 5 inserted into the opening 4 provided in the opening 27.

The present embodiment is different from the first embodiment in that the electrode extraction portion 3 has a higher resistance portion 28 made of the same high resistance material as that for forming the resistance pattern portion 2. The point is that it is completely covered with the low resistance part 29 having a relatively small resistance value.

In a preferred embodiment of the present embodiment, the dimensions of the high resistance portion 28 are 2.8 mm long and 1.8 mm wide, and the dimensions of the low resistance portion 29 are 3.0 mm long and 2.0 mm wide.
A resistance material made of lead ruthenate and glass having a sheet resistance value of 4 MΩ / □ is used for the resistance pattern portion 2 and the high resistance portion 28, and a ruthenium sheet having a sheet resistance value of 1 kΩ / □ is used for the sheet resistance of the low resistance portion 29. A resistance material made of lead acid and glass is used. The thickness of the low resistance portion 29 is about 12 μm.
And

In this manner, the metal terminal 6 is in contact only with the low-resistance portion 29 of the electrode extraction portion 3, and the low-resistance portion 29 has a large area with the high-resistance portion 28 integrated with the resistance pattern portion 2. In contact. Therefore, in the knocking process for removing foreign matter between the electrodes of the electron gun or on the inner wall surface of the neck portion during the manufacturing process of the cathode ray tube, the electrode contact portion 3 comes into contact with the electrode extraction portion 3 due to the impact when a sudden high voltage is applied. The instantaneous current flowing through the existing resistance pattern portion 2 causes a resistance breakdown to change the resistance value of the resistance pattern portion 2 or the resistance pattern portion 2 and the electrode extraction portion 3
It is possible to prevent loss of electrical connection with the substrate.

In the present embodiment, the metal terminal 6 that comes into contact with the electrode extraction portion 3 is connected to the terminal mounting portion 2 other than the electrode extraction portion 3.
7, the present invention is not limited to this, and the present invention is not limited to this, and may be used for the cathode ray tube built-in resistor in the prior art shown in FIG. 22 in which the electrode extraction portion 3 and the terminal attachment portion 27 match. In the knocking process, it is possible to obtain an effect of preventing the occurrence of resistance breakdown of the electrode extraction unit 3 due to an impact when a sudden high voltage is applied.

This embodiment can be combined with various examples of the cathode ray tube built-in resistor 16 shown in the first embodiment and the second embodiment.

(Embodiment 4) FIG. 11 shows a fourth embodiment of the present invention.

The cathode ray tube built-in resistor 16 of the present embodiment.
Is a method in which a resistance pattern portion 2 and an electrode extraction portion 3 are formed on an insulating substrate 1 made of ceramic or the like, and an electrical connection between the electrode extraction portion 3 and the metal terminal 6 is obtained by contact of the projection 8 of the metal terminal 6. This point is the same as the first embodiment.

This embodiment is different from the first embodiment in that the metal terminal 6 is inserted into the opening 4 and covers one end of the insulating substrate 1 and a part of the electrode outlet 3. This is the point where they are bent and joined to form a shape. As shown in FIG. 12, the metal terminal 6 of the present embodiment is welded at one end side of the insulating substrate (FIG.
An A ′ cross-section is shown, and a cross in the figure indicates a welding point).

In a preferred example of the present embodiment, the electrode extraction portion 3 is a rectangle having a length of 3.0 mm and a width of 2.0 mm, and has a hole 4.
Was a rectangle having a length of 1.2 mm and a width of 0.3 mm, and the center-to-center distance d between the electrode extraction portion 3 and the opening 4 was 0.9 mm. Further, the metal terminal 6 has a thickness of 0.1 mm, and has a width of 1.0 mm and a length of 20.0 m before being attached.
m and the material was stainless steel.

According to the present embodiment, the metal terminal is formed in a closed circuit shape that penetrates the opening and covers a part of the electrode mounting portion, so that the metal terminal is hooked to the insulating substrate and firmly fixed. be able to. Therefore, it is possible to prevent the rotation of the metal terminal and the like, and it is possible to stably maintain the contact between the metal terminal and the electrode extraction portion.

When the displacement of the metal terminal is eliminated, the electrode take-out portion is less likely to be peeled off, so that high-pressure quality deterioration due to the generation of peeled material can be prevented.

Further, since the metal terminal is formed integrally, the number of parts is reduced, and the workability and the economic efficiency are improved.

In the present embodiment, there is shown an example in which there is only one opening, and the metal terminal is inserted through the opening to form a closed circuit that covers a part of one end of the insulating substrate. For example,
As shown in FIG. 13, two openings may be provided, and the metal terminal may pass through both openings and form a closed circuit covering a part of the electrode mounting portion between the two openings.

Further, in the present embodiment, the convex portion has a shape extending over the entire width of the metal terminal.
As described above, the same operation can be obtained even when the number of the protrusions 8 is one or more. In addition, the convex portion 8 is not limited to being formed by stamping or the like, and can be formed by, for example, attaching another member to the metal terminal, or cutting and bending the metal terminal.

(Embodiment 5) FIG. 15 shows a fifth embodiment of the present invention.

In the cathode-ray tube built-in resistor according to the present embodiment, a resistance pattern portion (not shown) and an electrode extraction portion 3 are formed on an insulating substrate 1 made of ceramic or the like. The contact between the electrode extraction portion 3 and the metal terminal 6 is obtained by contact, and the metal terminal 6 is inserted into the opening 4 and bent to cover a part of the electrode extraction portion 3. This point is the same as the fourth embodiment.

This embodiment is different from the fourth embodiment in that the metal terminal 6 is connected to the electrode mounting portion 3 between the two openings 4.
Is formed so as to cover a portion of the insulating substrate 1, penetrate both openings 4, and bend on the surface of the insulating substrate 1 on the side opposite to the electrode extraction portion 3.

According to the present embodiment, the metal terminal can be hung on the insulating substrate and firmly fixed without forming the metal terminal in a closed circuit. Therefore, it is not always necessary to perform the welding connection to make the metal terminal closed, and it is possible to prevent high quality deterioration caused by the adhesion of foreign matter generated during welding.

(Embodiment 6) FIG. 16 shows a sixth embodiment of the present invention.

The resistor with a built-in cathode ray tube according to the present embodiment has a resistance pattern portion (not shown) and an electrode extraction portion 3 formed on an insulating substrate 1 made of ceramic or the like. The contact between the electrode extraction portion 3 and the metal terminal 6 is obtained by contact, and the metal terminal 6 is inserted into the opening 4 and bent to cover a part of the electrode extraction portion 3. This point is the same as the fifth embodiment.

This embodiment differs from the fifth embodiment in that a wedge-shaped insulator 30 is fitted between the insulating substrate 1 and the metal terminal 6 inside the opening 4. is there.

In a preferred example of the present embodiment, the wedge-shaped insulator 30 has a length of 0.5 mm and a width of 0.8 mm, and has a thickness of 0.2 mm on the thick side and 0.1 mm on the thin side. 1mm
The material was the same ceramic material as the insulating substrate.

According to the present embodiment, the wedge-shaped insulator is inserted between the metal terminal and the insulating substrate, so that the metal terminal can be prevented from being displaced. It can be fixed more firmly than the fifth embodiment. Therefore, the metal terminal and the electrode extraction portion can be reliably brought into contact.

In this embodiment, an example is shown in which a wedge-shaped insulating material is inserted into one of the two openings.
A wedge-shaped insulating material can be inserted into both openings.

It is needless to say that the present invention can be applied to a case where the metal terminal is closed.

(Seventh Embodiment) Next, a seventh embodiment of the present invention is shown in FIG.

The cathode ray tube built-in resistor of this embodiment has a resistance pattern portion (not shown) and an electrode extraction portion 3 formed on an insulating substrate 1 made of ceramic or the like. The point that the electrode extraction portion 3 and the metal terminal 6 are electrically connected by contact, and that the metal terminal 6 is
The fourth embodiment is the same as the fourth embodiment in that it is inserted into the opening 4 provided in the electrode 7 and is bent so as to cover a part of the electrode extraction portion 3.

This embodiment is different from the fourth embodiment in that a projection 31 is provided at a position of the metal terminal 6 located at the opening 4, and the metal terminal 6 is brought into close contact with the inner wall of the opening 4. It is.

In a preferred embodiment of the present embodiment, the projection 31 of the metal terminal is formed into an elliptical shape as shown in FIG. 18, having a length of 0.35 mm, a maximum width of 0.3 mm, and a height of 0.25 mm.
And

According to the present embodiment, since the metal terminal has the projection inside the opening, the metal terminal is firmly fixed to the insulating substrate without shifting. Therefore, the electrical connection between the metal terminal and the electrode extraction portion can be stably maintained.

Further, since the metal terminal can be fixed without providing any special additional parts as in the sixth embodiment, a simpler configuration can be achieved.

In the present embodiment, the shape of the projection is an ellipse. However, the shape is not limited to this, and it may be a perfect circle, a rectangle, or the like. Good.

Further, it goes without saying that the present invention can be applied even when the metal terminal is in a closed circuit shape.

(Embodiment 8) FIG. 19 shows an eighth embodiment of the present invention.

In the cathode ray tube built-in resistor of this embodiment, a resistance pattern portion (not shown) and an electrode extraction portion 3 are formed on an insulating substrate 1 made of ceramic or the like. The contact between the electrode extraction portion 3 and the metal terminal 6 is obtained by contact, and the metal terminal 6 is inserted into the opening 4 and bent to cover a part of the electrode extraction portion 3. This point is the same as the fourth embodiment.

The present embodiment is different from the fourth embodiment in that the metal terminal 6 has a crimp portion 32 protruding toward the insulating substrate as shown in FIG. is there.

In a preferred example of the present embodiment, the crimping portion has a curved shape and has a width of 2.
0 mm, height 0.5 mm, and bending radius 5.0 mm.

According to the present embodiment, since the metal terminal has a spring property when the metal terminal is attached to the insulating substrate by forming the crimped portion on the metal terminal, the convex portion 8 is firmly formed with a high contact pressure. Contacts the electrode take-out part 3. Therefore, the contact between the metal terminal and the electrode extraction portion can be stably maintained.

In this embodiment, an example is shown in which the crimping portion is located on the surface of the insulating substrate opposite to the electrode extracting portion. However, as shown in FIG. The crimping portion 32 may be formed around the convex portion 8 of the metal terminal so as to be located on the side surface.

Further, in the first to eighth embodiments, the example of the resistor mounted on the insulating support 24 of the electron gun 14 and supplying the focusing potential to the first focusing electrode has been described. The cathode ray tube built-in resistor is not limited to this, and may be one that supplies an intermediate potential to another electrode of the electron gun, for example, one or more intermediate potential electrodes provided between the focusing electrode and the final acceleration electrode. Is also good. It is not limited to the one that supplies a potential to the electrode of the electron gun, and the focusing electrode and the focusing voltage are supplied from outside to prevent the cathode ray tube operation circuit from being destroyed by spark discharge between the final accelerating electrode and the focusing electrode. In a cathode ray tube of a type in which a spark current suppressing resistor is built in between a stem pin to be used and a spark current suppressing resistor may be used, or in a mask focusing type cathode ray tube, an intermediate potential is applied to a shadow mask. Or a resistor for supplying an intermediate potential in a cathode ray tube forming a so-called bulb lens between the shadow mask and the electron gun.

Further, the cathode ray tube built-in resistor of the present invention can be applied to both a color cathode ray tube and a monochrome cathode ray tube.

[0091]

As described above, according to the cathode ray tube built-in resistor of the present invention, when the cathode ray tube built-in resistor is mounted on an electron gun or the like, it is connected to the metal terminal for conducting and fixing the cathode ray tube built-in resistor. Even if a large force is applied, the resistance material forming the electrode extraction portion does not peel off. Therefore, at a high voltage during operation of the cathode ray tube, it is possible to prevent the peeled-off low resistance material from causing spark discharge between the electrodes, and the low resistance material may adhere to the screen portion of the cathode ray tube and become a defect on the screen. Can be prevented.

Further, since the high-resistance portion of the electrode pattern portion and the low-resistance portion of the electrode take-out portion are in contact with each other over a wide area, the shock caused by a sudden high voltage application during the knocking process in the cathode ray tube manufacturing process. In addition, a desired voltage can be stably supplied to a predetermined electrode without causing resistance destruction of the electrode extraction portion.

The cathode ray tube of the present invention can stably supply a desired electrode even when a voltage cannot be directly supplied from the outside, so that high reliability can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view of a cathode ray tube built-in resistor according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the cathode ray tube according to the embodiment;

FIG. 3 is a schematic view showing an electron gun of the cathode ray tube according to the embodiment.

FIG. 4 shows a second example of the cathode-ray tube built-in resistor according to the embodiment.
Partial enlarged view showing an embodiment of

FIG. 5 shows a third example of the cathode-ray tube built-in resistor according to the embodiment.
Partial enlarged view showing an embodiment of

FIG. 6 shows a fourth example of the cathode-ray tube built-in resistor according to the embodiment.
Partial enlarged view showing an embodiment of

FIG. 7 is a partially enlarged view showing a first example of the cathode-ray tube built-in resistor according to the second embodiment of the present invention;

FIG. 8 shows a second example of the cathode-ray tube built-in resistor according to the embodiment.
Partial enlarged view showing an embodiment of

FIG. 9 shows a third example of the cathode-ray tube built-in resistor according to the embodiment.
Partial enlarged view showing an embodiment of

FIG. 10 is a partially enlarged view showing a cathode ray tube built-in resistor according to a third embodiment of the present invention.

FIG. 11 is a partially enlarged view of a cathode ray tube built-in resistor according to a fourth embodiment of the present invention.

FIG. 12 is a partial sectional view of the cathode-ray tube built-in resistor according to the embodiment;

FIG. 13 is a partial sectional view showing a second example of the cathode-ray tube built-in resistor according to the embodiment.

FIG. 14 is a partially enlarged view showing a third example of the cathode-ray tube built-in resistor according to the embodiment.

FIG. 15 is a partial cross-sectional view of a cathode-ray tube built-in resistor according to a fifth embodiment of the present invention.

FIG. 16 is a partial cross-sectional view of a cathode ray tube built-in resistor according to a sixth embodiment of the present invention.

FIG. 17 is a partial cross-sectional view of a cathode ray tube built-in resistor according to a seventh embodiment of the present invention.

FIG. 18 is a partially enlarged view showing protrusions of metal terminals of the cathode-ray tube built-in resistor according to the embodiment.

FIG. 19 is a partial cross-sectional view of a cathode ray tube built-in resistor according to an eighth embodiment of the present invention.

FIG. 20 is a partially enlarged view showing a crimp portion of a metal terminal of the cathode-ray tube built-in resistor according to the embodiment.

FIG. 21 is a partial cross-sectional view showing a second example of the cathode-ray tube built-in resistor according to the embodiment.

FIG. 22 is a perspective view showing a conventional cathode ray tube built-in resistor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulating board 2 Resistance pattern part 3 Electrode extraction part 4 Opening 6 Metal terminal 27 Terminal mounting part

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yuichi Onishi 1-1, Sachimachi, Takatsuki-shi, Osaka Matsushita Electronics Co., Ltd. (72) Inventor Hiroshi Hasegawa 1-1-1, Sachimachi, Takatsuki-shi, Osaka Matsushita Electronics Co., Ltd. F-term (reference) 5C041 AB14 AC14

Claims (13)

[Claims] And a terminal mounting portion having at least one opening in the insulating substrate near the electrode extracting portion, wherein the terminal mounting portion includes a resistor pattern portion and an electrode extracting portion formed on the insulating substrate. A cathode ray tube built-in resistor fixed to a predetermined portion in a cathode ray tube via a metal terminal attached to the cathode ray tube. 2. The cathode ray tube built-in resistor according to claim 1, wherein said electrode extraction portion has a lower resistance value than said resistance pattern portion. 3. The cathode ray tube built-in resistor according to claim 1, wherein said opening of said terminal mounting portion is non-circular. 4. The cathode ray tube built-in resistor according to claim 1, wherein said metal terminal is fixed to said insulating substrate at a portion other than said opening of said terminal mounting portion. 5. A resistance pattern portion and an electrode extraction portion are formed on an insulating substrate, and the electrode extraction portion includes a high-resistance portion formed of the same material as a material forming the resistance pattern portion. A cathode-ray tube built-in resistor, which is formed by being covered with a low-resistance portion formed of a material having a relatively lower resistance value than a material forming a resistance pattern portion. 6. An insulating substrate in the vicinity of the electrode extraction portion, having a terminal mounting portion having at least one opening, and fixed to a predetermined portion in a cathode ray tube by a metal terminal mounted on the terminal mounting portion. A cathode ray tube built-in resistor according to claim 5. 7. The semiconductor device according to claim 1, wherein the metal terminal is fixed to the insulating substrate through the opening.
Or the cathode ray tube built-in resistor according to 5. 8. The cathode ray tube built-in resistor according to claim 7, wherein said metal terminal forms a closed circuit surrounding a part of said insulating substrate. 9. The cathode ray tube built-in resistor according to claim 7, wherein said metal terminal is bent along both the surface on said electrode lead-out portion side of said insulating substrate and the surface on the opposite side. body. 10. The cathode ray tube built-in resistor according to claim 7, wherein a wedge is provided in a gap between the metal terminal and the insulating substrate inside the opening. 11. The metal terminal according to claim 7, wherein the metal terminal has a projection located inside the opening.
The resistor as described in the above. 12. The cathode wire according to claim 7, wherein said metal terminal has a crimping portion which is convex with respect to a surface of said insulating substrate on which an electrode extraction portion is formed or a surface opposite thereto. Tube built-in resistor. 13. A cathode ray tube, wherein a predetermined potential is supplied to an electrode in the tube by the cathode ray tube built-in resistor according to claim 1.