KR20010091492A - Cathode ray tube - Google Patents

Abstract

PURPOSE: A cathode ray tube is provided to achieve improved reliability by ensuring an electrical connection between terminal and terminal connection conductive film and maintaining stable focus voltage over a long period of time. CONSTITUTION: A cathode ray tube includes an electron gun which has an anode(1) functioning as the sixth grid electrode to which a maximum voltage is applied, an intermediate grid electrode(2) to which the voltage divided by a voltage dividing resistor(10) is applied, the fifth grid electrode group(3) constituted by a plurality of electrodes forming a main lens for focusing the electron beam emitted from a cathode(K), the fourth grid electrode(4), the third grid electrode(5), the second grid electrode(6) and the first grid electrode(7). Each electrode has an outer edge partially buried into a pair of insulating support levers(9). The sixth grid electrode has a shield cup(8) attached thereto. The voltage dividing resistor is attached to the insulating support lever for fixing electrode groups of electron gun. The voltage dividing resistor has terminals(11,12,13). wherein the terminal(13) is connected to a side wall of the shield cup where the anode voltage is applied, the terminal(12) is connected to the intermediate grid electrode, and the terminal(11) is grounded.

Description

Cathode Ray Tube {CATHODE RAY TUBE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube for image display, and more particularly to a cathode ray tube having a voltage divider resistor in an electron gun housed in its neck portion.

The cathode ray tube for image display is provided with a fluorescent surface (screen screen) which accommodates an electron gun which emits a plurality of electron beams to one end of a vacuum external device, and has a plurality of phosphor films coated on the inner surface of the other end.

Most color cathode ray tubes have a color selection electrode (e.g., a shadow mask) provided in close proximity to the fluorescent surface.

The electron gun is mainly composed of a so-called inline electron gun which emits three electron beams in parallel on one plane.

FIG. 14 is a perspective view illustrating the configuration of the terminal portion of the voltage divider resistor provided in the electron gun, and FIG. 15 is a partial view illustrating the configuration of the terminal portion.

In this divided resistor 50, a resistor layer 22 having a predetermined resistance characteristic is formed on the insulating substrate 16. As shown in FIG.

And the insulating film layer 17 of glass is formed so that the resistor layer (resistor pattern) 22 may be coat | covered.

The terminal 53 of one end of the voltage divider resistor 50 is connected to a shield cup fixed to the sixth grid electrode, and the terminal 51 of the other end is connected to an electrode piece at ground potential, and the terminal ( 52 is connected to the intermediate electrode 2.

As shown in Fig. 15, the terminal 51 is inserted into the terminal hole 15, which is a through hole formed in the insulating substrate 16, with the metal eyelet 511 in contact with the electrode 14 for terminal connection. The caulking is fixed to the insulating substrate.

The connecting piece 51C is formed integrally with the terminal 51.

16 is a sectional view of the vicinity of the terminal 51.

The conventional built-in resistor has made the whole electrode side flange part 51A contact the connection electrode, in order to contact the terminal 51 and the connection electrode 14 reliably. In addition, in order to reliably fix the terminal 51 to the insulated substrate, the insulated substrate side flange portion 51D was configured such that its end faced outward with respect to the terminal hole 15.

Moreover, as what disclosed the color cathode ray tube provided with this kind of voltage divider resistor, Unexamined-Japanese-Patent No. 55-38484 is mentioned, for example.

Moreover, as a built-in resistor for cathode ray tubes which fixed the terminal to the insulated board by caulking, Unexamined-Japanese-Patent No. 5-258680, Unexamined-Japanese-Patent No. 6-68811, 6-251901, and 9 -260119 and Japanese Patent Application Laid-Open No. 9-298037.

Metal eyelets formed of a hard metal such as stainless steel cannot sufficiently coke, resulting in a problem of failing to make stable electrical contact between the terminal and the conductive film.

As a countermeasure, it is also possible to consider increasing the load at the time of caulking. However, when the caulking load is large, the opening edges of the through-holes of the insulating substrate are missing.

Moreover, in the prior art, the built-in resistor has a problem in that the number of parts to be used is large and the parts management and manufacturing processes are complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a color cathode ray tube with an electron gun provided with a voltage divider resistor which has a stable and good voltage supply function by solving the problems of the prior art.

According to the present invention, the flange portion of the metal eyelet constituting the terminal of the voltage divider resistor is provided with a convex portion on the side of the side connecting the conductive film to make a reliable electrical contact with the conductive film formed on the substrate by elasticity. The other side is end inward.

By this structure, the defect of the opening edge of the through-hole of an insulated substrate is prevented, and the contact with the electrically conductive film for terminal connection becomes favorable. Then, the recessed portion of the flange portion absorbs the difference in thermal expansion with the insulating substrate due to the temperature change, so that the electrical connection is good, and the supply of stable focus voltage is maintained, thereby obtaining a highly reliable color cathode ray tube.

1 is a plan view of an electron gun of a cathode ray tube according to the present invention;

FIG. 2 is a sectional view taken along line II of FIG. 1; FIG.

3 is a plan view of a metal eyelet constituting a terminal of a voltage divider resistor;

4 is a sectional view taken along line II-II in FIG. 3;

5, 6 and 7 are explanatory diagrams of the coking operation of the metal eyelet which comprises a terminal.

8 is a plan view of another embodiment of a metal eyelet constituting the terminal of the voltage divider resistor;

9 is a plan view of another embodiment of a metal eyelet constituting the terminal of the voltage divider resistor;

10 is a plan view of a voltage divider resistor.

Fig. 11 is a sectional view of a colored cathode ray tube according to the present invention.

Fig. 12 is a side view of the main portion of a colored cathode ray tube containing an inline electron gun with a voltage divider resistor;

Fig. 13 is a partial sectional view of a projection cathode ray tube according to the present invention.

14 is a perspective view for explaining a configuration of a terminal portion of a voltage divider resistor.

Fig. 15 is a partial view for explaining the structure of a terminal portion.

Fig. 16 is a sectional view for explaining the structure of a conventional terminal portion.

<Explanation of symbols for the main parts of the drawings>

8: shield cup

9: insulated support lever

12: terminal

16: insulation board

17: insulation film layer

18: caulking die

22: resistor layer

50: voltage divider resistor

121: Eyelet

Representative configurations of the present invention are as follows.

(1) Insulation support for fixing an electron beam generating unit, a focusing accelerator for focusing and accelerating the electron beam toward the fluorescent surface, and a plurality of electrodes constituting the electron beam generating unit and the focusing accelerator in a predetermined order and at intervals; A color cathode ray tube containing an electron gun having a lever and a voltage divider resistor attached to an insulating support lever for supplying a required voltage having a different potential difference to a plurality of electrodes constituting the focusing accelerator,

The voltage divider includes a resistor pattern formed on the surface of the insulating plate, a conductive film for terminal connection formed at both ends and an intermediate portion of the resistor pattern, and a connecting piece integrally formed at the outer edge thereof, A metal eyelet composed of a cylindrical portion inserted into a center of a recessed portion of a plate-shaped flange portion having a plurality of slits is provided as an external lead-out terminal,

The flange part of the said metal eyelet and the electrically conductive film for terminal connection were surface-contacted by inserting and caulking the cylindrical part of the said metal eyelet through the through-hole formed as it penetrates the said terminal connection conductive film and the insulating plate.

(2) A fluorescent surface and a shadow mask serving as a color selection electrode are provided, and an electron gun for generating three series of electron beams is arranged in the neck portion, and a resistor in which the resistor is formed in the form of an insulating substrate is disposed in the neck portion. The resistor has an electrode for connection, the electrode is electrically connected to an electron gun by a metal terminal,

The terminal has a first flange portion, a connecting piece, a tubular portion, and a second flange portion, and in electrical contact with the resistor by coking the resistor at the first flange portion and the second flange portion,

At least a part of the first flange portion is bent in an upward direction of the tubular portion to form a convex portion, the convex portion is electrically connected to the resistor, and the second flange portion is double.

(3) an electron gun which has a panel portion having a phosphor layer formed on an inner surface thereof, a neck portion, and a funnel portion connecting the panel portion and the neck portion, wherein the neck portion generates an electron beam to emit an electron beam toward the phosphor layer; Wherein the electron gun comprises a resistor in which a resistor is formed in an insulated substrate type, the resistor has an electrode for connection, and the electrode is electrically connected to the electron gun via a metal terminal,

The terminal is inserted into a through hole formed in the resistor, and includes a tubular portion having a first flange portion and an opening, and a second flange portion, and sandwiching the resistor with the first flange portion and the second flange portion, Fixed to the resistor,

The 2nd flange part is made to be folded, and the edge part of the terminal located in the said 2nd flange is facing the center direction of the said through hole.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail with reference to drawings of an Example.

1 is a side view of an inline electron gun with a voltage divider viewed from a direction perpendicular to a straight line.

The electron gun has an anode (sixth grid electrode) 1 to which the highest voltage (anode voltage) is applied, an intermediate grid electrode 2 to which a voltage divided by a voltage divider resistor is supplied, and an electron beam emitted from the cathode K. A fifth grid electrode group 3, a fourth grid electrode 4, a third grid electrode 5, a second grid electrode 6, and a plurality of electrodes constituting a main lens for focusing the light; And a first grid electrode 7.

Each of the electrodes 1 to 7 is embedded in a pair of insulating support levers (bead glass) 9 with a part of their outer edges fixed at a predetermined order and at a predetermined interval.

The shield cup 8 is attached to the sixth grid electrode 1.

A voltage divider 10 is attached to one side of the insulating support lever 9 that fixes the electrode group of the electron gun. This voltage divider 10 is provided with connection external drawing terminals (hereinafter simply referred to as terminals) 11, 12, 13. The terminal 13 is connected to the side wall of the shield cup 8 to which an anode voltage is applied, the terminal 12 is connected to the intermediate grid electrode 2, and the terminal 11 is grounded.

FIG. 2 is a sectional view taken along the line I-I of FIG.

Reference numeral 12A denotes a first flange portion, 12B denotes a cylindrical portion, 12C denotes a connecting piece, 12D denotes a second flange portion, 14 denotes an electrode for terminal connection, 15 denotes a hole for a terminal penetrating an insulating substrate, 16 denotes an insulating substrate, 17 is an insulating film.

The terminal 12 includes a first flange portion 12A and a connecting piece 12C at one end thereof. The first flange portion 12A is in contact with the terminal connecting electrode (hereinafter referred to as a connecting electrode) 14 formed on the insulated substrate, so that electrical conduction is achieved. This connecting electrode is formed of a conductive film.

Moreover, the convex part is formed in the surface which contacts the connecting electrode 14 of 12 A of 1st flange parts. By contacting this convex part with the connection electrode 14, stable contact can be obtained by the elastic action of the terminal 12. FIG. The edge portion of the first flange portion 12A faces outward with respect to the terminal hole 15.

The terminal 12 is provided with the 2nd flange part 12D at the other end. The second flange portion 12D has a double structure folded on the way. In other words, the edge portion of the second flange portion 12D is directed toward the center of the terminal hole 15. Since the second flange portion 12D has a double structure, the terminal 12 can be securely fixed. The terminal 12 is fixed by the first flange portion 12A and the second flange portion 12D sandwiching the resistor.

Therefore, stable electrical contact can be secured over a long period of time, so that the divided voltage to the focus electrode can be reliably supplied, and it is possible to provide a highly reliable color cathode ray tube.

The terminal 12 is provided with the cylindrical part 12B between 12 A of 1st flange parts, and 12 D of 2nd flange parts. The second flange portion 12D is formed by bending a part of the cylindrical portion 12B.

In addition, the thickness of the second flange portion 12D of the terminal 12 is thinner than that of the insulating film 17. Therefore, contact with the other electron gun components can be suppressed by the terminal 12.

The height L of the terminal 12 on the insulating support lever 9 is higher than the height LG of the insulating film 17 on the insulating support lever 9 (height LG <height L). The insulating film and the insulating support lever 9 are separated by contacting the terminal 12 with the insulating support lever 9.

In the present embodiment, the height L of the terminal 12 on the insulating support lever 9 is 0.2 mm, the height LG of the insulating film 17 on the insulating support lever 9 side is 0.13 mm, and the insulating support lever 9 The plate thickness LT of the terminal 12 is 0.13 mm, and the plate thickness T of the both insulating films 17 and the insulating substrate 16 is 1.17 mm.

By providing a gap between the insulating film 17 and the insulating support lever 9, the breakdown voltage characteristic between the insulating film 17 and the insulating support lever 9 is improved.

In the knocking step, about 60 kV, which is about twice the normal voltage, is applied to the anode electrode, and electrodes other than the anode electrode and the intermediate electrode are grounded. When such a high voltage is applied to the anode electrode, discharge between the insulating film 17 and the insulating support lever 9 can be prevented, and breakage of the insulating film 17 can be prevented. And since the terminal 12 does not contact the insulating film 17, damage to the insulating film 17 in the vicinity of the terminal 12 can be prevented.

Also in the terminal 11, the height of the terminal 11 on the insulating support lever 9 is made higher than the height LG of the insulating film 17 on the insulating support lever 9 side, whereby the insulating supporting lever 9 and the insulating film The contact of (17) can be eliminated. Since the insulating support lever 9 and the insulating film 17 do not contact each other, breakage of the voltage divider 10 can be prevented.

In addition, the knocking voltage applied to the anode can be made sufficiently high, so that foreign matter adhering to the electron gun can be removed. And a cathode ray tube which displays a favorable image can be obtained.

3 is a plan view of the metal eyelet 121 before forming the terminal 12 of FIG. 4 is a cross-sectional view taken along the line II-II of FIG. 3.

The metal eyelet 121 constituting the terminal 12 has a plate-shaped first flange portion 12A in which a connecting piece 12C is integrally formed at an outer edge thereof. Moreover, it has the cylindrical part 12B pinched in the center of the recessed part of 12 A of flange parts.

The convex part is formed in the surface which contacts the connection electrode of the 1st flange part 12A. By contacting this convex part with the connection electrode 14, stable contact can be obtained by the elastic action of the terminal 12. FIG.

The bending angle θ of the first flange portion 12A is larger than 0 ° and preferably 45 ° or less. Preferably it is 5 degrees-20 degrees.

As for the metallic eyelet 121, 12F of opposite ends (end of the cylindrical part 12B) 12F of the 1st flange part 12A is facing inward with respect to a cylindrical part. That is, the end part 12F faces the center direction of the hole 15 for terminals.

In addition, the inner diameter of the terminal 12 differs from the 1st flange side and the edge part 12F side.

5 to 7 show a process for forming a terminal of the present invention. Reference numeral 18 is a caulking die. This caulking die 18 is equipped with the shaft center 19 which inserts the cylindrical part 12B of a metal eyelet.

5 shows a state in which the eyelet 121 and the resistance substrate 101 are mounted on the caulking die 18. In the resistive substrate 101, a resistor, a connecting electrode 14, and a terminal hole 15 are formed on an insulating substrate 16 made of alumina. Moreover, a part of resistance and the electrode for a connection are coat | covered with the glass 17 (for example, lead boride silicate glass).

In the bending work (hereinafter referred to as caulking work), the flange portion 12A of the metal eyelet 121 constituting the terminal is connected to the connection hole 14 in the hole 15 for the terminal penetrating the insulating substrate. The cylindrical part 12B is inserted in contact. At this time, the tip portion of the cylindrical portion 12B protrudes from the insulating substrate.

The coking operation is performed in two steps.

6 is a view for explaining the coking operation of the first step. In the coking operation of the first step, a portion in contact with the eyelet 121 uses a spherical coking tool (hereinafter referred to as a spherical punch) 20. A load is placed on the upper portion of the cylindrical portion 12B by the spherical punch 20. This operation deforms the upper portion of the cylindrical portion 12B.

Since the distal end portion of the punch 20 is a curved surface having a curvature R, the upper portion of the cylindrical portion 12B is convexly deformed outwardly with respect to the terminal hole 15. On the other hand, the end part 12F of a cylindrical part faces the terminal hole direction.

In the above embodiment, since the cylindrical portion 12B of the eyelet 121 has a cylindrical shape, a spherical punch is used, but it may have a curvature adapted to the shape of the cylindrical portion.

7 is a view for explaining the coking operation of the second step. Reference numeral 21 denotes a coking tool for use in the coking operation of the second step. The part which contacts the eyelet 121 is planar.

After using the spherical punch, the terminal 12 is formed by further deforming the upper portion of the cylindrical portion 12B by using a flat caulking tool (planar punch) 21 shown in FIG.

As described above, the terminal 12 shown in FIG. 2 can be obtained.

In the deformed eyelet 121, the end portion (end portion of the eyelet 121) 12F of the cylindrical portion 12B faces the hole direction for the terminal, and forms the second flange portion 12D having a double structure.

At this time, the convex part 12E of the 1st flange 12A is in contact with the connection electrode.

The cylindrical part 12B of the eyelet 121 is not limited to a cylindrical shape, but may be a square pillar shape.

As described above, the resistor with the terminal 12 formed by the two coking operations did not have a minute defect. Since the caulking operation is divided into a plurality of times, the load during one caulking can be reduced.

8 is an embodiment of another metallic eyelet 122. As shown in FIG.

A plurality of slits 12G are formed in the peripheral edge of the flange portion 12A, and a connecting piece 12C is integrally formed in a part of the edge. This slit 12G is formed in the target position by the longitudinal center axis | shaft of the connection piece 12C.

The cylindrical portion 12B of the metallic eyelet 122 is inserted through the insulating hole of the voltage divider resistor and the through hole of the connecting electrode 14 in the same manner as described in Figs. . The terminal 12 using the metal eyelet 122 has an angle θ at the first flange portion 12A. The presence of the angle θ ensures contact between the connecting electrode 14 and the terminal 12.

At this time, due to the presence of the slit 12G, sufficient contact can be obtained between the flange portion 12A and the conductive film for terminal connection without increasing the caulking load. That is, by forming the slit 12G, the elastic strength of the first flange portion 12A can be adjusted, and stable contact can be obtained.

A slit was formed in the flange part of the metal eyelet which comprises the terminal of a voltage divider resistor, and the coking load was made small. By this structure, heat processing is unnecessary, and the caulking load of the flange part of a metal eyelet becomes small, the defect of the opening edge of the through-hole of an insulated substrate is prevented, and the contact with the electrically conductive film for terminal connection becomes favorable.

Therefore, a more reliable colored cathode ray tube can be obtained by using an electron gun provided with a voltage divider having this terminal configuration.

9 shows an embodiment of another metallic eyelet 123.

In this structural example, the slit 22c is formed in the non-object position in the longitudinal center axis of the connection piece 22a. By setting it as this structure, the efficiency of the press punching in eyelet manufacture can be improved.

The position of the slit 12G formed in the flange part 12A is not specifically limited. In addition, although the number of the slits 12G should just be at least 1, it is preferable to set it as three in the Example from the point of balance of the load at the time of caulking, and connection strength.

Therefore, stable electrical contact can be secured over a long period of time, so that the divided voltage to the focus electrode can be reliably supplied, and it is possible to provide a highly reliable color cathode ray tube.

Fig. 10 is a plan view for explaining an actual configuration example of a voltage divider resistor used in a color cathode ray tube according to the present invention.

The resistor pattern 19 is made of a bent and folded pattern as shown in order to obtain a required voltage value in a limited plane of the insulating substrate 16.

By using this voltage divider 10, the electrical connection is good and the supply of stable focus voltage is maintained, and a highly reliable color cathode ray tube can be obtained.

Fig. 11 is a side view of the main portion of the color cathode ray tube, and Fig. 12 is a side view of the electron gun shown in Fig. 11 as seen from the linear direction.

Fig. 11 is a schematic cross-sectional view illustrating the structure of a cathode ray tube to which the present invention is applied, wherein 31 is a panel portion, 33 is a neck portion, 32 is a funnel portion for connecting and contacting the neck with the panel, and 34 is formed on the inner surface of the panel portion. Phosphor screen constituting the image display surface, 35 is a shadow mask which is a color selection electrode, 36 is an inner shield that shields external magnetism, 37 is a deflection yoke that deflects the electron beam disposed in the funnel horizontally and vertically, 38 is The electron gun 39, which is stored in the neck and fires with three electron beams B in a horizontal line, is a magnetic device for color purity and centering correction.

In the structure of the same figure, the panel part 31, the neck part 33, and the funnel part 32 comprise a vacuum external apparatus, and the electron beam B emitted from the electron gun 38 deflects the yoke 37 By virtue of the deflection magnetic field formed in ()), the phosphor screen 34 is scanned in two dimensions in both horizontal and vertical directions.

12 is a cross-sectional view when the electron gun of FIG. 1 is accommodated in the neck portion 33 of the vacuum external device of the color cathode ray tube.

Reference numeral 40 is a stem pin for supplying a required signal to each electrode.

One end of the contact spring 41 is welded to the front side of the shield cup 8.

On the inner wall of the vacuum external device, a built-in conductive film 42, such as graphite, is applied to extend the anode voltage (maximum voltage) introduced from the anode button (not shown) formed in the funnel portion to a portion of the neck portion to supply the electron gun. The other end of the contact spring 41 is elastically contacted with the built-in conductive film 42 to supply the anode voltage to the sixth grid electrode 1.

The connecting piece 13C extending from the terminal 13 is welded to the side surface of the shield cup 8.

Moreover, the connection piece 12C is taken out from the terminal 12, it is welded to the intermediate grid electrode 2, and the high voltage which divided the anode voltage by the resistance ratio is supplied to the intermediate electrode 2. As shown in FIG.

And it connects to the metal piece embedded in the insulation support lever 9 from the terminal 11 via 11 C of connecting pieces. The metal piece is connected to any one of the stem pins, and is connected to a potential (ground potential) such as ground from the outside of the cathode ray tube via the stem pin 40.

In addition, this invention is not limited to the said structure, A various change is possible in the range which does not deviate from the technical idea of this invention, and is not limited to the color cathode ray tube provided with the electron gun which emits multiple electron beams, For example, the present invention can be similarly applied to various types of cathode ray tubes having an electron gun provided with a projection type cathode ray tube for emitting an electron beam and other voltage divider resistors.

Fig. 13 is a view showing an embodiment of the projection type cathode ray tube, in which the upper side is a half-section view of the main part, and the lower side is a half-side view of the main part. The same applies to the case of a built-in resistor having one electron gun in one cathode ray tube.

In general, the projection cathode ray tube is disposed at a position spaced apart from the projection screen by a necessary distance to project the reproduced image on the outer plate panel surface of the projection cathode ray tube to the projection screen surface, so as to obtain an enlarged projection image from the reproduced image. Widely used in image projection apparatus.

In the same figure, the electron gun 381 which radiates, controls, accelerates, and focuses the electron beam B is accommodated in the neck part 331 of a glass valve. The panel portion 311 includes a projection cathode ray tube in which a monochromatic fluorescent surface 341 is deposited on its inner surface. Further, a deflection yoke 371 is attached around the funnel portion of the glass valve to deflect the electron beam B emitted from the electron gun 381 in the horizontal and vertical directions to emit the fluorescent surface 341.

In addition, although the terminal 12 was demonstrated in the said Example, you may make the terminal 11 and 13 the same structure.

In the above embodiment, the case of three terminals has been described, but the present invention is not limited thereto.

As described above, according to the present invention in which the slit of the flange portion of the metal eyelet constituting the terminal of the voltage divider resistor is formed, sufficient surface contact with the conductive film for terminal connection can be obtained with a small caulking load, and the operating temperature Since the positional deviation due to the change is reduced and the electrical connection is good, the supply of stable focus voltage is maintained for a long time, and a highly reliable color cathode ray tube can be obtained.

Claims (12)

In the cathode ray tube which has a fluorescent surface and the shadow mask which acts as a color selection electrode, and the electron gun which generate | occur | produces three series of electron beams arrange | positioned at the neck part, In the neck, a resistor in which a resistor is formed in the form of an insulated substrate is disposed, the resistor has an electrode for connection, and the electrode is electrically connected to the electron gun by a metal terminal, The terminal has a first flange portion, a connecting piece, a tubular portion, and a second flange portion, and in electrical contact with the resistor by coking the resistor at the first flange portion and the second flange portion, At least a portion of the first flange portion is bent in an upward direction of the tubular portion to form a convex portion, and the convex portion is electrically connected to the resistor, And said second flange portion is double. The cathode ray tube according to claim 1, wherein the first flange portion is bent from the vicinity of an attachment portion with the tubular portion, and an end portion of the first flange portion is electrically connected to the electrode. The cathode ray tube according to claim 2, wherein the bending angle of the first flange portion is greater than 0 ° and less than 45 ° with respect to the substrate surface of the electrode. The cathode ray tube according to claim 3, wherein a bending angle of the first flange portion is 5 ° to 20 ° with respect to the substrate surface of the electrode. A panel portion having a phosphor layer formed on an inner surface thereof, a neck portion, and a funnel portion connecting the panel portion and the neck portion, wherein the neck portion contains an electron gun for generating an electron beam and firing an electron beam toward the phosphor layer; In one cathode tube, The electron gun includes a resistor in which a resistor is formed in an insulating substrate type, the resistor has an electrode for connection, and the electrode is electrically connected to the electron gun via a metal terminal, The terminal is inserted into a through hole formed in the resistor, and includes a tubular portion having a first flange portion and an opening, and a second flange portion, and sandwiching the resistor with the first flange portion and the second flange portion, Fixed to the resistor, A cathode ray tube, characterized in that the second flange portion is folded, and an end portion of the terminal positioned in the second flange faces a center direction of the through hole. The cathode ray tube according to claim 5, wherein the opening of the terminal is smaller than the opening diameter of the second flange portion side of the opening. 6. The cathode ray tube according to claim 5, wherein an end portion of the terminal located at the second flange is located at the center side of the through hole from the tubular portion. The cathode ray tube according to claim 5, wherein the electron gun emits a single electron beam, and the fluorescent surface is formed of a single phosphor. The cathode ray tube according to claim 5, wherein the electron gun emits three lines of electron beams arranged in series, and the fluorescent surface is formed of three colors of phosphor layers. The cathode ray tube according to claim 5, wherein the first flange portion is bent from near the attachment portion with the tubular portion, and an end portion of the first flange portion is electrically connected to the electrode. 6. The cathode ray tube of claim 5, wherein a bending angle of the first flange portion is greater than 0 ° and less than 45 ° with respect to the substrate surface of the electrode. The cathode ray tube according to claim 5, wherein a bending angle of the first flange portion is 5 ° to 20 ° with respect to the substrate surface of the electrode.