JP2004235065A - Power feeding device for cathode ray tube and power feeding method for cathode ray tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power feeding device and a power feeding method for a cathode ray tube capable of effectively preventing situations such that a stem base is displaced in an oblique direction when attaching/detaching a feed socket since a stem base and a stem are fixedly bonded with an adhesive and various processings such as withstand voltage processing by attaching the supply socket to the stem base mounted on the outside surface of the stem and by applying voltage to each electrode in a manufacturing process of a cathode ray tube are carried out before the adhesive sufficiently solidifies, that sufficient mechanical strength is not attained since a gap occurs between the stem and the stem base, and that the withstand voltage between stem pins degrades to secure sufficient adhesive strength and withstand voltage. <P>SOLUTION: When the feed socket 31 is detached/attached to the stem pin 22 of the cathode ray tube in which the stem base 23 adhered on the outside surface of the stem 21 with the adhesive 28, elastic force is given from the feed socket 31 side by an elastic body 40 to almost uniformly push the entire surface of the stem base 23 in a direction of the stem 21. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power supply device for a cathode ray tube and a power supply method for a cathode ray tube, and more particularly to a power supply device for a cathode ray tube and a power supply method for a cathode ray tube, which make it possible to attach and detach a power supply socket without displacing a stem base of the cathode ray tube.
[0002]
[Prior art]
As shown in FIG. 6, a color cathode ray tube used for a general color television receiver and a display device of a terminal display has a face panel 61 having a substantially rectangular shape, and is integrally formed with the face panel 61. It has an envelope made of a funnel 62 joined in a funnel shape, and a phosphor screen 63 made of a striped or dot-shaped three-color phosphor layer that emits blue, green, and red light on the inner surface of the face panel 61. A shadow mask 64 having a number of apertures formed therein is mounted via a mask frame 65 in opposition to the phosphor screen 63.
[0003]
On the other hand, in the neck 66 of the funnel 62, there are arranged in-line type electron guns 68 which emit three electron beams 67B, 67G, 67R and are arranged in a line in the horizontal direction. The electron beams 67B, 67G, and 67R are deflected by horizontal and vertical deflection magnetic fields generated by a deflection yoke 69 mounted outside the funnel 62, and horizontally and vertically scan the phosphor screen 63 via a shadow mask 64. Thus, a color image is displayed on the phosphor screen 63.
[0004]
The electron gun 68 includes, for example, three cathode electrodes arranged in a row in the horizontal direction, a heater for heating the cathode electrodes, and a traveling direction of the electron beams 67B, 67G, and 67R. And a plurality of grid electrodes arranged in this order. These electrodes are supported and fixed in the neck 66 at predetermined intervals by an insulating support made of bead glass. Each of these electrodes is electrically connected to a stem pin 71 that is annularly implanted in a stem 70 that is connected and sealed to the neck 66.
[0005]
In order to protect the plurality of stem pins 71 implanted in the stem 70, a circular stem base 72 is fixed to the outer surface of the stem 70 with an adhesive on the stem 70. As shown in FIG. 7, the stem base 72 is formed from an insulating material such as a synthetic resin, and is formed into a circular shape substantially the same as the outer shape of the stem 70. A concave portion 74 is formed on the surface facing the stem 70 and accommodates an outer surface portion of the stem 70. A central portion of the concave portion 74 accommodates an exhaust pipe (not shown) provided in the stem 70. Is provided. A plurality of through-holes 76 are provided on the outer periphery of the protection cylinder 75 to allow the stem pins 71 arranged in a ring to pass therethrough.
[0006]
Then, an adhesive 77 for mechanically bonding the stem 70 to the stem base 72 and for achieving electrical insulation between the stem pins 71 is attached to the periphery of the stem pins 71, and thereafter, the respective stem pins 71 are fixed to predetermined positions. The stem base 72 is attached to the outer surface of the stem 70 while pressing in the direction of the stem 70 indicated by the arrow A from below the stem base 72 so as to correspond to the through hole 76, and the adhesive 77 is solidified. The stem 70 is adhered and fixed.
[0007]
Since the adhesive 77 applies a high voltage applied to the grid electrode of the electron gun 68 to the stem pins 71, the adhesive 77 insulates the stem pins 71 so as to improve the withstand voltage between the stem pins 71, and furthermore, prevents external forces applied to the stem pins 71. It also has a function of bonding and fixing a stem base 72 that protects the stem 70 from being damaged, thereby firmly fixing the stem 70 and the stem base 72 while insulating them. For this purpose, a silicone rubber adhesive 77 having both electrical insulation performance and high adhesive strength is exclusively used as the adhesive 77.
[0008]
A predetermined operating voltage is supplied to the heater, the cathode electrode, and each grid electrode through the stem pin 71 penetrating the stem base 72, and the grid electrodes focus the electron beams 67 B, 67 G, and 67 R on the phosphor screen 63. A plurality of electron lens groups are configured.
[0009]
In such a color cathode ray tube, in particular, the electron gun 68 is configured as an in-line type electron gun 68 that emits a center beam 67G passing on the same horizontal plane and a pair of side beams 67B and 67R on both sides thereof. The three electron beams 67B, 67G, 67R are concentrated at the center of the phosphor screen 63 by decentering the positions of the through holes 67B, 67R of the electrodes on the low-voltage side and the high-voltage side of the main lens portion of the main lens portion. A self-convergence type color cathode ray in which the three electron beams 67B, 67G, and 67R arranged in a line are self-concentrated over the entire area of the screen by configuring the horizontal deflection magnetic field generated by 69 as a pincushion type and the vertical deflection magnetic field as a barrel type. Tubes are widely used.
[0010]
In the color cathode ray tube configured as described above, after being manufactured through a predetermined manufacturing process, a heater, a cathode electrode, and a plurality of selected grid electrodes constituting the electron gun 68 are connected by a power supply cable 79 from a power supply 78. A predetermined voltage is applied by attaching the supplied power supply socket 80 to the stem pin 71 on the outside of the stem base 72 to measure withstand voltage processing, static characteristics such as cutoff voltage, emission characteristics, withstand voltage characteristics, gas measurement, and the like. Or aging treatment or the like.
[0011]
As shown in FIG. 8, the power supply socket 80 has a plurality of through-holes 82 corresponding to the stem pins 71 at one end of a cylindrical socket main body 81 formed of a synthetic resin, and a central portion corresponding to the protective cylinder 75. A contact plate 84 having a through-hole 83 formed therein is disposed in a portion, and a bottom plate 85 having a power supply cable 79 inserted therethrough is formed in a box shape. A socket pin holder 86 having a socket pin 85 corresponding to the stem pin 71 is fixed inside the socket body 81 near the contact plate 84, and a protective cylinder 75 can be inserted into the center of the socket pin holder 86. Thus, the through-hole 87 is formed. Each socket pin 85 is connected to a power supply cable 79, and a predetermined voltage is selectively applied to each socket pin 85 from a power supply 78.
[0012]
In the power supply socket 80 configured as described above, the protection cylinder 75 constituting the stem base 72 is made to correspond to the through hole 83 of the contact plate 84, and the stem pin 71 is made to correspond to the through hole 82 of the contact plate 84, The stem pin 71 is fitted to the socket pin 85 by being pressed in the direction of arrow B in the drawing, that is, toward the stem base 72 side. By applying a predetermined voltage to each socket pin 85 through the power supply cable 79 in this fitted state, a predetermined voltage is applied to each electrode via the stem pin 71, and processing such as withstand voltage processing, static characteristic measurement, and aging is performed. Is performed. After these processes are completed, the power supply socket 80 is detached from the stem base 72 in a direction opposite to the arrow B direction in the figure.
[0013]
[Problems to be solved by the invention]
Such various processes are performed during the manufacturing process of the color cathode ray tube. However, when the power supply socket 80 is attached or detached, the stem base 72 adhered to the stem 70 by the adhesive 77 is inclined. It has occurred.
[0014]
That is, the time required from the application of the adhesive 77 between the stem 70 and the stem base 72 to the final step of completing the color cathode ray tube is about 3 to 4 hours. As shown in FIG. 9, when the stem base 72 is adhered to the stem 70 using the adhesive 77, the relationship between the adhesion elapsed time and the detachment strength of the stem base 72 is as shown in FIG. 15.0kg / cm ² When 5 hours or more including about 1 hour of the aging time of the color cathode ray tube have passed after the adhesive 77 is applied, the color cathode ray tube reaches almost a practical range in terms of mechanical strength and withstand voltage. In a dry state at a humidity of 40% or less, the layer requires 10 hours or more to solidify.
[0015]
Therefore, since various processes such as a withstand voltage process are performed within this time, the adhesive 77 is not yet sufficiently solidified, in other words, the stem 70 and the stem base 72 are sufficiently hardened. It will be implemented before it is glued and fixed to. For this reason, when unnecessary oblique pressure is applied to the stem base 72 when the power supply socket 80 is attached or detached, as shown in FIG. Sometimes happened.
[0016]
When the stem base 72 is mounted and fixed to the stem 70 in such an oblique state, a gap is generated between the stem base 72 and the stem 70, and the adhesive 77 insulates the stem pins 71 from each other. The effect is weakened, the withstand voltage may be degraded, or it may be difficult to sufficiently satisfy the mechanical strength, resulting in a defective product.
[0017]
As described above, when the power supply socket 80 is mounted on the stem base 72 to perform various processes, and when the power supply socket 80 is removed from the color cathode ray tube after those processes, extreme care is required. In order to detach the power supply socket 80 so that the base 72 and the stem 70 are not separated from each other so as to be stable and constant, there is a problem that a special mounting device is required or a skilled skill is required.
[0018]
The present invention has been made in view of such a problem, and it is possible to prevent the displacement of the stem base even when the power supply socket is attached and detached, so that the mechanical strength of the stem base is stable. It is an object of the present invention to provide a cathode-ray tube power supply device and a cathode-ray tube power supply method, which can maintain sufficient electrical insulation.
[0019]
[Means for Solving the Problems]
The present invention provides a cylindrical power supply socket main body, a socket pin holder having a plurality of socket pins fixed to the main body and into which a stem pin of a cathode ray tube is inserted and held, and formed inside or protruding from the main body and coaxial with the socket pin. A power supply device for a cathode-ray tube, comprising: an elastic body that generates a pressing force in a direction, wherein the elastic body applies an elastic pressure between a stem base of the cathode-ray tube and a power supply socket body when the stem pin is mounted on the socket pin. It is.
[0020]
Also, a face panel formed in a substantially rectangular shape, a funnel-shaped funnel connected to the face panel, a phosphor screen formed on the inner surface of the face panel, and an electron beam arranged in the neck of the funnel to emit an electron beam. An electron gun that radiates onto the body screen, a plurality of stem pins arranged in a ring on the stem connected to the neck end and connected to each electrode of the electron gun, and a cylindrical body fixed to the outer surface of the stem with adhesive and in the center A cathode ray tube having a stem base having a plurality of through holes through which stem pins are annularly arranged around the cylindrical body, and a predetermined voltage is supplied by being selectively fitted to the stem pins of the stem base. A socket pin supplied via a cable, a socket pin holder having a through hole for holding the socket pin and inserting a cylindrical body, and A power supply socket having a cylindrical power supply socket body to be held and an elastic body that generates a pressing force between the socket body and the stem base when the socket body is mounted on the stem base. This is a power supply device for a cathode ray tube that applies a pressing force that is applied to the stem base substantially uniformly.
[0021]
Furthermore, a face panel having a phosphor screen on the inner surface, a funnel-shaped funnel connected to the face panel, an electron gun arranged in the neck of the funnel and emitting an electron beam to the phosphor screen, and the electron gun A stem having a plurality of stem pins connected in a ring and connected to the neck end, and a stem base fixed to the outer portion of the stem by an adhesive and penetrating the stem pin and having a tubular body in the center portion. In a power supply method for a cathode ray tube, which is supplied to an electron gun through a power supply socket having a socket pin that is selectively mounted on a stem base of a cathode ray tube and that is fitted with a stem pin, a power supply socket is provided between the stem base and the power supply socket. Cathode wire that applies a substantially uniform elastic force to the stem base and supplies power while pressing It is a use power supply method.
[0022]
By adopting such a configuration and mounting method, unnecessary displacement is not given between the stem of the cathode ray tube and the stem base even when the power supply socket is attached / detached, so that the stem base is firmly and insulated. It is possible to obtain a cathode ray tube power supply device and a cathode ray tube power supply method that can be mounted without deteriorating performance.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a power supply device for a cathode ray tube and a power supply method for a cathode ray tube of the present invention will be described in detail with reference to the drawings.
[0024]
That is, as shown in FIG. 1, the color cathode ray tube has an envelope formed of a substantially rectangular face panel 11 and a funnel-shaped funnel 12 integrally joined to the face panel 11. On the inner surface of the face panel 11, a phosphor screen 13 composed of a striped or dot-shaped three-color phosphor layer that emits blue, green, and red light is formed. Is mounted via a mask frame 15.
[0025]
On the other hand, in the neck 16 of the funnel 12, there are arranged in-line type electron guns 18 which emit three electron beams 17B, 17G, 17R and are arranged in a line in the horizontal direction. The electron beams 17B, 17G, and 17R are deflected by horizontal and vertical deflection magnetic fields generated by a deflection yoke 19 mounted outside the funnel 12, and horizontally and vertically scan the phosphor screen 13 via a shadow mask 14. Thus, a color image is displayed on the phosphor screen 13.
[0026]
The electron gun 18 includes, for example, three cathode electrodes K arranged in a row in the horizontal direction, a heater for heating the cathode electrodes K, and a phosphor from the cathode electrode K side in the traveling direction of the electron beams 17B, 17G, and 17R. It has a plurality of grid electrodes G1 to Gn sequentially arranged in the direction of the screen 13, and these electrodes K, G1 to Gn are supported and fixed in the neck 16 at predetermined intervals by an insulating support 20 made of bead glass. ing. The electrodes K, G1 to Gn are connected to an inner pin portion located in the neck 16 annularly implanted in the stem 21 connected to the neck 16 and sealed, and an outer pin portion protruding outward from the stem 21. Is electrically connected to the stem pin 22.
[0027]
In order to protect the plurality of stem pins 22 implanted in the stem 21, a circular stem base 23 is fixed to the outer surface of the stem 21 with an adhesive to the stem 21. As shown in FIG. 2, the stem base 23 is formed of an insulating material such as a synthetic resin, and is formed into a circular shape substantially the same as the outer shape of the stem 21. It has a concave portion 25 formed on the surface side facing the stem 21 and for accommodating an outer surface portion of the stem 21, and a central portion of the concave portion 25 for accommodating an exhaust pipe (not shown) provided on the stem 21. Is provided. A plurality of through holes 27 through which the stem pins 22 arranged in a ring are penetrated are provided on the outer periphery of the protection cylinder 26.
[0028]
The concave portion 25 is filled with an adhesive 28 for mechanically bonding the stem 21 and the stem base 23 and for electrical insulation between the stem pins 22. Such a stem base 23 is mounted while pressing each stem pin 22 toward the stem 21 from below the stem base 23 while corresponding to the predetermined through-hole 27, and the adhesive 28 is solidified, so that the The stem base 23 and the stem 21 are bonded and fixed with an adhesive 28 interposed therebetween.
[0029]
Since this adhesive 28 applies a high voltage applied to the grid electrodes G <b> 1 to Gn of the electron gun 18 to the stem pins 22, the adhesive 28 insulates the stem pins 22 so as to improve the withstand voltage between the stem pins 22. It also has a function of bonding and fixing a stem base 23 that protects the stem 21 from being damaged from an external force to be applied, and firmly fixes the stem 21 and the stem base 23 while insulating them. For this purpose, a silicone rubber-based adhesive 28 having both electric insulation performance and high adhesive strength is used as the adhesive 28.
[0030]
A predetermined operating voltage is supplied to the heater, the cathode electrode K, and each of the grid electrodes G1 to Gn via the stem pins 22 penetrating the stem base 23, and the grid electrodes G1 to Gn fluoresce the electron beams 17B, 17G, 17R. A plurality of electron lens groups to be focused on the body screen 13 are configured.
[0031]
In such a color cathode ray tube, in particular, the electron gun 18 is configured as an in-line type electron gun 18 that emits a center beam 17G passing on the same horizontal plane and a pair of side beams 17B and 17R on both sides thereof. The three electron beams 17B, 17G, 17R are concentrated at the center of the phosphor screen 13 by decentering the positions of the side beam 17B, 17R passage holes of the electrodes on the low-voltage side and the high-voltage side of the main lens portion of the main lens portion. A self-convergence type color cathode ray in which three electron beams 17B, 17G, and 17R arranged in a line are self-concentrated over the entire screen by forming the horizontal deflection magnetic field generated by the pin 19 into a pincushion shape and the vertical deflection magnetic field into a barrel shape. It is configured as a tube.
[0032]
In the color cathode ray tube thus configured, after being manufactured through a predetermined manufacturing process, the heater, the cathode electrode K, and the plurality of selected grid electrodes G1 to Gn constituting the electron gun 18 are supplied from the power supply 29 to the heater. A predetermined voltage is applied by attaching the power supply socket 31 connected by the power supply cable 30 to the stem pin 22 on the outside of the stem base 23, thereby withstanding voltage processing, cutoff voltage, emission characteristics, withstand voltage characteristics, gas measurement, and the like. Of the static characteristics or aging treatment.
[0033]
As shown in FIG. 2, the power supply socket 31 has a plurality of through-holes 33 corresponding to the stem pins 22 and a plurality of through holes 33 corresponding to the stem pins 22 at one end of a cylindrical socket main body 32 formed of a synthetic resin. A contact plate 35 having a through hole 34 formed in the center is arranged, and the other end is formed in a box shape having a bottom plate 36 into which the power supply cable 30 is inserted. A rod 37 for pushing the stem base 23 is axially movably inserted through the bottom plate 36, and a locking plate 38 is provided at one end of the rod 37, and a spring plate is provided inside the socket body 32 at an intermediate portion thereof. 39 are attached. An elastic body 40 composed of a coiled spring is mounted on the outer periphery of the rod 37 between the spring stopper 39 and the bottom plate 36. The elastic body 40 exerts an elastic force to push the rod 37 in the axial direction toward the contact plate 35. Has been granted.
[0034]
On the other hand, a socket pin holder 42 in which a socket pin 41 corresponding to the stem pin 22 is arranged is fixed inside the vicinity of the contact plate 35 of the socket main body 32. A through hole 43 is formed so that the cylindrical body 26 can be inserted. Each of the socket pins 41 is inserted through the inside of the rod 37, and is electrically connected to the power supply cable 30 led out of the rod 37 through, for example, a slit (not shown) formed in the axial direction. A predetermined voltage is selectively applied to each socket pin 41.
[0035]
In the power supply socket 31 configured as described above, the protection cylinder 26 constituting the stem base 23 is made to correspond to the through hole 34 of the contact plate 35, and the stem pin 22 is made to correspond to the through hole 33 of the contact plate 35, As shown in FIG. 3, the stem pin 41 is pressed to the stem base 23 side and fitted to the socket pin 22 to be mounted. At this time, at the time when the tip of the stem pin 22 is inserted into the socket pin 41, the tip of the rod 37 of the power supply socket 31 and the tip of the protection cylinder 26 of the stem base 23 are in contact with each other or before the contact. By doing so, the rod 37 and the protective cylinder 26, in other words, the stem base 23 and the power supply socket 31 come into contact with each other in a pressed state while receiving the elastic force of the elastic body 40 in the direction of the arrow in FIG. 3. become.
[0036]
When the power supply socket 31 is mounted on the stem base 23, the elastic body 40 does not fall out of the stem base 23 due to the repulsive force of the elastic force of the elastic body 40, and the power supply socket 31 is connected to the stem base 23. It is necessary to set the elastic force of the stem 37 so that the rod 37 always presses the protective cylinder 26 of the stem base 23 until the stem pin 22 is detached from the stem 23. And the relationship between the elastic force of the elastic body 40 and
Holding force of stem pin 22> elastic force of elastic body 40
It is set so that
[0037]
In this manner, the power supply socket 31 is fitted to the stem base 23, and a predetermined voltage is applied to each socket pin 41 through the power supply cable 30 in this fitted state, so that a predetermined voltage is applied to each electrode via the stem pin 22. Is applied to perform withstand voltage processing, static characteristic measurement, aging, and the like.
[0038]
Then, after these processes are completed, the power supply socket 31 is detached from the stem base 23. At the time of attachment / detachment of the power supply socket 31, the adhesive that still adheres the stem base 23 and the stem 21 is used. 28 was not sufficiently solidified, and there was a risk that the stem base 23 was displaced obliquely with respect to the stem 21. When the socket 31 is detached from the stem base 23, the tip of the rod 37 is always the tip of the protection cylinder 26 of the stem base 23, ie, the stem base 23, until the stem pin 22 is completely detached from the socket pin 41. Since the substantially central portion is elastically pressed toward the stem 21, the stem base 23 is provided with a substantially uniform elastic force over the entire surface of the stem 21. It will be continue to be pressed.
[0039]
Therefore, even when the power supply socket 31 is detached from the stem base 23, the stem base 23 is pressed against the stem 21 by a uniform elastic force, and the stem base 23 is displaced obliquely with respect to the stem 21. This makes it possible to prevent such a situation and prevent problems such as deterioration of withstand voltage characteristics and mechanical strength from occurring. In addition, since the central portion of the stem base 23 is pressed, the pressing can be performed with extremely stability, and an excellent effect can be exhibited in this aspect.
[0040]
In order to elastically press the rod 37 against the protective cylinder 26 of the stem base 23, a coiled elastic body 40 is used. Instead of the coiled elastic body 40, a plate-shaped elastic body is used. It is also possible to use 40. That is, the same effect can be obtained even if the plate-like elastic body 40 is arranged between the spring stopper 39 attached to the rod 37 and the bottom plate 36 so as to apply an axial elastic force to the rod 37. It is possible to do.
[0041]
Alternatively, as shown in FIG. 4, the rod 37 itself is fixed to the bottom plate 36 by locking plates 38 and 38 ′, and a plate-like elastic body 40 is fixed to the distal end stem base 23 side of the fixed rod 37. The elastic body 40 may be configured to apply an elastic force in the direction of the stem base 23. In this case, the deformation of the elastic body 40 is equivalent to the stroke for attaching and detaching the power supply socket 31, that is, the deformation stroke is at least equivalent to the distance that the stem pin 22 can be inserted into and removed from the socket pin 41. Although it is necessary to provide the power supply socket 31, the configuration itself as the power supply socket 31 can be further simplified.
[0042]
In the above embodiments, the case where the rod 37 is used to press the substantially central portion of the stem base 23 has been described, but only the central portion of the stem base 23 is pressed. The present invention is not limited to this, and it is also possible to configure so as to press the peripheral portion of the stem base 23 substantially uniformly.
[0043]
That is, as shown in FIG. 5, the power supply cable 30 is inserted into the bottom plate 36 of the power supply socket 31, the power supply cable 30 is connected to each socket pin 41, and the rod 37 is omitted. A contact plate 35 provided at one end of the socket main body 32 is movably disposed with respect to the socket main body 32, and a large diameter through which both the stem pin 22 and the protective cylinder 26 are inserted into a central portion of the contact plate 35. Are formed, and a plurality of elastic bodies 40 are fixed between the periphery of the contact plate 35 and the socket pin holder 42. The same components as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0044]
With this configuration, when the power supply socket 31 is mounted on the stem base 23, the contact plate 35 elastically contacts the peripheral portion of the stem base 23 by the elastic body 40. The entire surface can be pressed substantially evenly, and the same effect as when the central portion of the stem base 23 is pressed by the rod 37 can be exerted.
[0045]
If the power supply socket 31 is further simplified, it is possible to omit the contact plate 35 and directly press the peripheral portion of the stem base 23 with the elastic body 40. It is also possible to arrange the 40 on the surface of the contact plate 35 instead of the socket pin holder 42, and it is also possible to use a plurality of plate-like elastic bodies 40 as the elastic body 40.
[0046]
The present invention is not limited to these embodiments, and can be applied to, for example, a color cathode ray tube using a delta type electron gun having a different electrode arrangement, or a black and white cathode ray tube. It goes without saying that various other applications and modifications are possible.
[0047]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent the stem base from being displaced even when the power supply socket is attached and detached, to have sufficient mechanical strength for this purpose, and It is possible to obtain a cathode-ray tube power supply device and a cathode-ray tube power supply method capable of supplying power without deteriorating the withstand voltage between them.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a power supply device for a color cathode ray tube according to an embodiment of the present invention.
FIG. 2 is a sectional view showing a configuration of a stem base of a color cathode ray tube and a power supply device.
FIG. 3 is a sectional view for explaining a state in which a power supply socket is mounted on a stem base of the color cathode ray tube.
FIG. 4 is a sectional view showing another configuration of the power supply socket.
FIG. 5 is a sectional view showing still another configuration of the power supply socket.
FIG. 6 is a partially cutaway sectional view showing a conventional cathode ray tube power supply device.
FIG. 7 is a cross-sectional view for explaining a configuration for mounting a stem base on a stem portion of the cathode ray tube.
FIG. 8 is a sectional view showing the configuration of a stem base and a power supply socket.
FIG. 9 is a characteristic diagram showing the relationship between the elapsed bonding time and the pull-out strength when the stem base and the stem are bonded via an adhesive.
FIG. 10 is a cross-sectional view for explaining a displacement state of the stem base that occurs when the power supply socket is attached and detached.
[Explanation of symbols]
11 :: Face plate
12: Funnel
13: phosphor screen
16: Neck
17B, 17G, 17R: electron beam
18: electron gun
21: Stem
22: Stem pin
23: Stem base
26: Protection cylinder
27: Through-hole
28: adhesive
30: Power supply cable
31: Power supply socket
32: Socket body
37: Rod
40: Elastic body
41: Socket pin
42: Socket pin holder

Claims (7)

A cylindrical power supply socket body,
A socket pin holder having a plurality of socket pins fixed to the main body and into which a stem pin of a cathode ray tube is inserted and held;
An elastic body formed in the main body or protruding from the main body and configured to generate a pressing force in a coaxial direction with the socket pin,
A power supply device for a cathode ray tube, wherein an elastic pressure is applied between a stem base of the cathode ray tube and a power supply socket body when the stem pin is attached to the socket pin by the elastic body. A face panel formed in a substantially rectangular shape;
A funnel-shaped funnel connected to this face panel,
A phosphor screen formed on the inner surface of the face panel,
An electron gun disposed in the neck of the funnel and emitting an electron beam to the phosphor screen;
A plurality of stem pins arranged annularly on a stem connected to the neck end and connected to each electrode of the electron gun;
A cathode ray tube having a stem base having a plurality of through holes through which the stem pins are fixed at the center and fixed to the outer surface of the stem by an adhesive and arranged in the center around the cylinder, and the stem pins are annularly arranged around the cylinder;
A socket pin selectively fitted with the stem pin of the stem base and supplied with a predetermined voltage via a power supply cable;
A socket pin holder that holds the socket pin and has a through hole through which the cylinder is inserted,
A cylindrical power supply socket body for holding the holder,
A power supply socket having an elastic body that generates a pressing force between the socket body and the socket base when the socket body is mounted on the stem base;
A power supply device for a cathode ray tube, wherein a pressing force is applied between the stem base and the power supply socket to the stem base substantially uniformly by the elastic body. A rod is provided in the power supply socket body at a position facing the cylindrical body of the stem base, and the rod is used to directly or indirectly press the cylindrical body by the elastic force of an elastic body to thereby provide the stem base. 3. The power supply device for a cathode ray tube according to claim 2, wherein the whole is pressed substantially evenly. A plurality of elastic bodies are attached to the contact plate attached to the socket pin holder or the power supply socket body, and the elastic body directly or indirectly presses the periphery of the power supply socket facing surface of the stem base substantially uniformly. 3. The power supply device for a cathode ray tube according to claim 2, wherein: A face panel having a phosphor screen on the inner surface, a funnel-shaped funnel connected to the face panel, an electron gun disposed in the neck of the funnel and emitting an electron beam to the phosphor screen, and connected to the electron gun A stem having a plurality of stem pins arranged annularly and connected to the neck end, and a stem base fixed to the outer portion of the stem with an adhesive and penetrating the stem pin and having a cylindrical body at the center portion. A cathode ray tube power supply method for selectively supplying power to the electron gun through a power supply socket including a socket pin that is selectively mounted on the stem base of the provided cathode ray tube and that is fitted with the stem pin.
A power supply method for a cathode ray tube, wherein a substantially uniform elastic force is applied to the stem base from the power supply socket side between the stem base and the power supply socket and power is supplied while being pressed. In the power supply socket, a rod is provided at a position facing the cylindrical body of the stem base, and the cylindrical body is elastically pressed directly or indirectly by using the rod, so that the entire stem base is substantially formed. The power supply method for a cathode ray tube according to claim 5, wherein pressing is performed evenly. 6. The cathode ray tube according to claim 5, wherein the power supply socket main body includes a plurality of elastic bodies, and the elastic body directly or indirectly presses the periphery of the power supply socket facing surface of the stem base substantially uniformly. Power supply method.

Images