JPH08162043A - Deflection yoke, and deflection yoke separator - Google Patents

Abstract

PURPOSE: To provide a deflection yoke separator capable of efficiently radiating the heat generated from a deflection yoke coil, and a deflection yoke using this deflection yoke separator. CONSTITUTION: A deflection yoke separator 10 made of synthetic resin for winding a deflection yoke coil has an opening part 15 on a part of the deflection yoke separator so that a deflection yoke coil 20 is exposed to the outside of the deflection yoke separator 10. A deflection yoke is formed of this deflection yoke separator 10 and a deflection yoke coil wound on the inside of this deflection yoke separator. An insulating member 16 having a heat conductivity higher than the heat conductivity of the synthetic resin forming the deflection yoke separator is in contact with the deflection yoke coil 20 exposed in the opening part 15 formed on the deflection yoke separator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke separator excellent in heat dissipation and a deflection yoke using the deflection yoke separator.

[0002]

2. Description of the Related Art Usually, a deflection yoke includes a horizontal magnetic field forming coil made of a coated copper wire (for example, a Litz wire), a horizontal coil separator which is a synthetic resin molded product for winding the horizontal magnetic field forming coil, and a coating A vertical magnetic field forming coil made of a copper wire, a vertical coil separator which is a synthetic resin molded product for winding the vertical magnetic field forming coil,
And a ferrite core attached to the outside of the vertical coil separator. Hereinafter, the horizontal coil separator and the vertical coil separator may be collectively referred to as a deflection yoke separator, and the horizontal magnetic field forming coil and the vertical magnetic field forming coil may be collectively referred to as a deflection yoke coil. There is also a deflection yoke in which the vertical magnetic field forming coil is wound directly on the ferrite core and the vertical coil separator is omitted.

When a current is passed through the deflection yoke coil, the deflection yoke coil generates heat. In particular, the heat generated from the horizontal magnetic field forming coil is large. With the recent expansion of the electron beam deflection angle and the increase of the horizontal scanning frequency, heat generation from the horizontal magnetic field forming coil tends to increase more and more. For example, when the horizontal scanning frequency is increased from 30 kHz to 70 kHz, the temperature of the deflection yoke separator rises by about 10 ° C or more.

[0004]

Generally, the thermal conductivity of a synthetic resin (for example, polyphenylene oxide) which constitutes a separator for a deflection yoke is about 0.17 W / m · ° C.
Copper has a thermal conductivity of about 400 W / m · ° C, and ferrite has a thermal conductivity of about 6.3 W / m · ° C. That is, the thermal conductivity of the synthetic resin forming the deflection yoke separator is much smaller than that of copper or ferrite. Therefore,
The heat radiation by the deflection yoke separator is small. Therefore, when the amount of heat generated from the deflection yoke coil increases, the deflection yoke separator is likely to be cracked or deformed due to heat, and the long-term reliability of the deflection yoke separator deteriorates. Further, it is necessary to change the material of the synthetic resin forming the deflection yoke separator to a material having higher heat resistance, which leads to an increase in the manufacturing cost of the deflection yoke. Alternatively, when the amount of heat generated from the deflection yoke coil increases, there is a problem that the characteristics and quality of the copper wire coating material deteriorates or the copper wire coating material is damaged, and the reliability of the deflection yoke coil decreases. Therefore, how to efficiently dissipate the heat generated from the deflection yoke coil from the deflection yoke separator has become a serious problem.

Therefore, an object of the present invention is to provide a deflection yoke separator which can efficiently dissipate heat generated from the deflection yoke coil, and a deflection yoke using such a deflection yoke separator.

[0006]

In order to achieve the above object, a deflection yoke separator of the present invention for winding a deflection yoke coil, which is made of a synthetic resin, has a deflection yoke coil of a deflection yoke separator. It is characterized in that an opening is formed in a part of the deflection yoke separator so as to be exposed to the outside.

In the deflection yoke separator of the present invention, it is preferable that the opening is formed in the straight portion of the deflection yoke separator located on the electron gun side.
Further, it is preferable that ribs are formed inside the deflection yoke separator, and the openings are formed over the entire inner normal distance between the ribs.

If the deflection yoke separator has heat resistance capable of withstanding heat generation of the deflection yoke coil, has desired electrical insulation, and satisfies various safety standards such as flame retardancy, It may be molded from any synthetic resin. Examples of such synthetic resin include polyphenylene oxide.

The deflection yoke of the present invention for achieving the above object comprises the deflection yoke separator of the present invention and the deflection yoke coil wound inside the deflection yoke separator. The insulating member having a thermal conductivity higher than that of the synthetic resin forming the deflection yoke separator is in contact with the deflection yoke coil exposed in the opening formed in the deflection yoke separator. Characterize.

The insulating member has a desired electrical insulating property,
A member made of any material may be used as long as it has a higher thermal conductivity than the synthetic resin forming the deflection yoke separator and satisfies various safety standards. As the insulating member, for example, a silicone rubber sheet, a plastic sheet filled with alumina, a semi-cylindrical molded article made of ceramic, or a ferrite core can be used.

[0011]

In the deflection yoke separator of the present invention,
Since the opening is formed in a part thereof, the heat generated in the deflection yoke coil can be effectively dissipated to the outside. Further, in the deflection yoke of the present invention, an opening is formed in a part of the deflection yoke separator, and moreover, the insulating member is in contact with the deflection yoke coil through this opening, so that the deflection yoke The heat generated in the coil can be effectively dissipated to the outside through the insulating member.

[0012]

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

First, a conventional deflection yoke separator will be described with reference to FIG. The surface of the conventional deflection yoke separator 100 whose schematic plan view is shown in FIG. 3 faces the phosphor screen surface side when assembled as a deflection yoke. The surface of the deflection yoke separator facing the phosphor screen surface is called the inside of the deflection yoke separator, and the surface of the deflection yoke separator facing the electron gun is called the outside of the deflection yoke separator. The deflection yoke separator 100 is divided into two parts at a reference numeral 11.
The deflection yoke separator 100 shown in FIG. 3 is a horizontal coil separator. The vertical coil separator is slightly different in shape from the horizontal coil separator, but the basic structure is the same. Deflection yoke separator 100
Is made of a synthetic resin (for example, polyphenylene oxide: trade name Noryl) and is molded by a known molding method.

Inside the deflection yoke separator 100, a plurality of ribs 12 extending substantially vertically are integrally formed with the deflection yoke separator 100, and a guide groove 13 is formed between the ribs 12. ing. Further, various protrusions are formed on the deflection yoke separator, and these protrusions function as guides for winding the deflection yoke coil around the deflection yoke separator.

FIG. 4 shows a schematic end view of a conventional deflection yoke separator. In addition, (A) of FIG. 4 is the line A of FIG.
4B is an end view taken along line -A, and FIG. 4B is an end view taken along line BB in FIG. 3. The coated copper wire passes through the space 20A in FIG. 4A, extends through the region 20 surrounded by the solid line in FIG. 4B (this portion corresponds to the guide groove 13), and As you go through the space 20B in A),
By winding around the ribs 12 and the protrusions, a horizontal or vertical magnetic field forming coil made of coated copper wire is formed.

Usually, the vertical coil separator wound with the vertical magnetic field forming coil is attached to the outside of the horizontal coil separator wound with the horizontal magnetic field forming coil.
Further, a ferrite core is attached to the outside of the vertical coil separator.

Generally, when the deflection yoke is operating,
The portion that generates the most heat is the thin necked straight portion 14 of the deflection yoke separator located on the electron gun side. This is because the coated copper wires are most concentrated in the straight portion 14 and it is difficult to dissipate heat.

Therefore, in the deflection yoke separator of the present invention, as shown in FIGS. 1A and 1B, an opening is formed in a part of the deflection yoke separator. Specifically, the opening 15 is provided in the straight portion 14 of the deflection yoke separator 10 located on the electron gun side, which is the most heat generating area. The opening 15 is formed between the ribs 12. In other words, the straight part 14
Is composed of only the rib 12. Incidentally, FIG. 1 (A)
3 is an end view similar to that taken along line AA in FIG. 3, and FIG. 1B is an end view similar to that taken along line BB in FIG. Also in the deflection yoke separator of the present invention shown in FIG. 1, the coated copper wire passes through the space 20A in FIG. 1 (A) and is surrounded by the solid line in FIG. 1 (B). A deflection yoke coil made of coated copper wire is formed by winding the rib 12 and the protrusion so as to extend through a space (corresponding to the guide groove 13) and pass through the space 20B in FIG. By providing such an opening 15, the deflection yoke coil is exposed to the outside of the deflection yoke separator through the opening 15.

The deflection yoke of the present invention comprises a deflection yoke separator made of synthetic resin (for example, made of polyphenylene oxide) shown in FIG. 1 and a deflection yoke coil wound inside the deflection yoke separator. That is, the deflection yoke coil is the deflection yoke separator 10
So that it is exposed to the outside of the deflection yoke separator 10
The opening 15 is formed in a part (specifically, the straight part 14) of the
Are formed.

Further, an insulating member having a thermal conductivity higher than that of the synthetic resin made of polyphenylene oxide, for example, is in contact with the deflection yoke coil exposed in the opening 15. It is necessary to select the insulating member 16 from a material that can sufficiently withstand the heat generated by the deflection yoke coil, and for example, a silicon rubber sheet can be used.
Specifically, the insulating member 16 made of a silicone rubber sheet
Is wound around the outside of the straight portion 14 of the deflection yoke coil 10 so as to come into contact with the deflection yoke coil in the region of the opening 15. The thermal conductivity of the silicone rubber sheet is 1.1 W / m · ° C, which is one digit higher than the thermal conductivity of the synthetic resin. Therefore, for example, the heat generated in the horizontal magnetic field forming coil wound around the horizontal coil separator is externally (for example, vertical magnetic field forming coil wound around the vertical coil separator) via the insulating member 16 in the opening 15. The heat is effectively dissipated in the coil. Further, the heat generated in the vertical magnetic field forming coil wound around the vertical coil separator is effectively radiated to the outside through the insulating member 16 in the opening 15. If the insulating member 16 is not provided, the air accumulated in the opening 15 is difficult to convect, so that the heat cannot be sufficiently radiated from the deflection yoke coil.

Even if the opening 15 is formed in the straight portion 14 of the deflection yoke separator 10, since the plurality of ribs 12 are provided in the straight portion, there is practically no problem in the strength of the deflection yoke separator. . Further, since the coated copper wire is wound around the rib 12 and the protrusion with a predetermined tension, the coated copper wire can be wound straight even if the opening 15 is formed in the straight portion 14 of the deflection yoke separator 10. Therefore, the winding accuracy of the coated copper wire does not decrease.

FIG. 2 shows a modification of the deflection yoke coil of the present invention shown in FIG. The example of the deflection yoke separator 10A shown in FIG. 2 is suitable for a vertical coil separator.
2A is an end view similar to that taken along line AA of FIG. 3, and FIG. 2B is a similar end view taken along line BB of FIG. Also in the deflection yoke separator of the present invention shown in FIG. 2, the coated copper wire passes through the space 20A of FIG. 2A and is surrounded by the solid line of FIG. 2B. The rib 12 extends so as to extend through the space 20B in FIG. 2A and corresponds to the guide groove 13.
The coil for the deflection yoke is formed from the coated copper wire by winding the coil around the projection and the projection.

Deflection yoke separator 10A shown in FIG.
In FIG. 1, the opening 15A corresponds to the opening 15 shown in FIG.
It extends to a predetermined position on the phosphor screen surface side. That is, an imaginary line is extended from the outer surface of the straight portion of the deflection yoke separator in which the opening is not formed to the phosphor screen surface side, and the opening 15A extends to the portion where the imaginary line intersects the inner surface of the deflection yoke separator. Extend. As a result, the deflection yoke separator 10A
The outer surface of the vertical magnetic field forming coil wound around is substantially coincident with the outer surface of the conventional deflection yoke separator having no opening. The outer surface and the inner surface of the deflection yoke separator mean the outer surface and the inner surface of the deflection yoke separator.

Then, the outer surface of the vertical magnetic field forming coil is brought into contact with the ferrite core 17. The ferrite core 17 also functions as an insulating member. As a result, the heat generated in the vertical magnetic field forming coil wound around the deflection yoke separator 10A or the heat generated in the horizontal magnetic field forming coil and transmitted to the vertical magnetic field forming coil also serves as an insulating member. The functioning ferrite core 17 radiates heat to the outside extremely effectively. Since the ferrite core 17 is an insulating material, there is no problem in terms of electrical safety standards.

When the deflection yoke separator is assembled by combining the deflection yoke separators of the present invention shown in FIGS. 1 and 2, as compared with the conventional deflection yoke separator shown in FIGS. 3 and 4. During the operation of the deflection yoke, the maximum temperature of the horizontal magnetic field forming coil dropped by about 10 ° C.

Although the present invention has been described above based on the preferred embodiments, the present invention is not limited to these embodiments. As the insulating member, instead of the silicone rubber sheet, a plastic sheet filled with alumina (Al ₂ O ₃ ) as a filler and having heat resistance and electrical insulation can be used. Furthermore, by attaching an insulating member made of a molded product obtained by molding ceramics such as alumina in a substantially semi-cylindrical shape to the outside of the deflection yoke separator and fitting a part of the molded product in the opening, it is more effective. Can dissipate heat. Incidentally, the thermal conductivity of alumina is 21 W / m · ° C. In any case, since the insulating member has a high electrical insulating property, there is no safety standard problem.

[0027]

In the deflection yoke separator and the deflection yoke of the present invention, the heat generated in the deflection yoke coil can be effectively dissipated to the outside through the insulating member. As a result, the long-term reliability of the deflection yoke separator can be improved, or there is no need to change the material of the synthetic resin forming the deflection yoke separator to a material having higher heat resistance. Furthermore, the characteristics and quality of the copper wire coating material can be prevented from deteriorating, and the reliability of the deflection yoke coil is improved. Therefore, a deflection yoke suitable for a higher horizontal scanning frequency can be manufactured only by providing an opening in the deflection yoke separator.

[Brief description of drawings]

FIG. 1 is a schematic end view of a deflection yoke separator of the present invention.

FIG. 2 is a schematic end view of a modification of the deflection yoke separator of the present invention.

FIG. 3 is a schematic plan view of a conventional deflection yoke separator.

FIG. 4 is a schematic end view of a conventional deflection yoke separator.

[Explanation of symbols]

 10 Deflection Yoke Separator 12 Rib 13 Guide Groove 14 Straight Part 15, 15A Opening 16 Insulation Member 17 Ferrite Core 20 Area Where the Deflection Yoke Coil Is Wound

Claims (5)

[Claims] 1. A coil for a deflection yoke for winding,
A deflection yoke separator made of synthetic resin, characterized in that an opening is formed in a part of the deflection yoke separator so that the deflection yoke coil is exposed to the outside of the deflection yoke separator. Separator. 2. The deflection yoke separator according to claim 1, wherein the opening is formed in a straight portion of the deflection yoke separator located on the electron gun side. 3. The deflection yoke according to claim 1 or 2, wherein a rib is formed inside the deflection yoke separator, and the opening is formed between the ribs. Separator. 4. A deflection yoke comprising the deflection yoke separator according to any one of claims 1 to 3 and a deflection yoke coil wound inside the deflection yoke separator, An insulating member having a thermal conductivity higher than that of the synthetic resin forming the deflection yoke separator is in contact with the deflection yoke coil exposed in the opening formed in the deflection yoke separator. Deflection yoke to do. 5. The deflection yoke according to claim 4, wherein the insulating member is made of a silicon rubber sheet, an alumina-filled plastic sheet, a semi-cylindrical molded article made of ceramic, or a ferrite core.