JPH10188851A - Deflection yoke and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress generation of heat in a horizontal deflection coil while holding a freedom degree of magnetic field distribution by the horizontal deflection coil. SOLUTION: A slot 25 constitutes a deflection yoke 20 to extend in a center axial direction, the slot 25 is formed continuously in an inner circumferential direction, in the slot 25 of a core 21, a vertical deflection coil 22 is wound. Inside thereof, a separator 23 is arranged, inside the separator 23, a horizontal deflection coil 24 is wound. In this separator 23, corresponding to a protruded part 26 in an inner surface of the core 21, a hole 27 extended in the center axial direction is formed, the protruded part 26 in the inner surface of the core 21 is inserted in the hole of the separator 23, so as to come into contact with an external diametric part of the horizontal deflection coil 24. In this way, while holding a freedom degree of magnetic field distribution of the horizontal deflection coil 24, its heat generation can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke suitable for use in a cathode ray tube device of a color television receiver. Specifically, a vertical deflection coil is wound around a core slot continuously formed in the inner circumferential direction, a separator is disposed on the inner surface side of the vertical deflection coil, and a horizontal deflection coil is wound on the inner surface side of the separator. In such a case, the convex portion on the inner surface of the core penetrates the hole of the separator and contacts the outer diameter portion of the horizontal deflection coil, or by slightly entering the horizontal deflection coil,
While securing the degree of freedom of the magnetic field distribution by the horizontal deflection coil,
The present invention relates to a deflection yoke for suppressing heat generation of a horizontal deflection coil and a method for manufacturing the deflection yoke.

[0002]

2. Description of the Related Art FIG. 7 shows a conventional cathode ray tube device. This cathode ray tube (CRT: Cathode-Ray Tube) 50
Is composed of a funnel 50b and a neck 50a, and a deflection yoke 60 is disposed in the funnel 50b.

The deflection yoke 60 is constructed by winding a vertical deflection coil and a horizontal deflection coil around a core. For example, each coil is wound in a saddle shape. As is well known, a sawtooth current having a horizontal deflection cycle flows through the horizontal deflection coil and a sawtooth current having a vertical deflection cycle flows through the vertical deflection coil, and the electron gun ( R (red), G (green), B (blue) from
Are deflected in up, down, left, and right directions.

FIG. 8A shows a cross section of the deflection yoke 60 cut in a direction perpendicular to the central axis direction (the tube axis direction of the cathode ray tube 50), and FIG. 8B shows a cross section taken along aa 'of FIG. 8A. As shown in the figure, the deflection yoke 60 includes a core 61a in which a slot 65a extending in the central axis direction is continuously formed in the inner circumferential direction, a vertical deflection coil 62a wound around the core 61a in a shape of a circle, and Vertical deflection coil 6
It comprises a separator 63a disposed on the inner surface side of 2a, and a horizontal deflection coil 64a wound in a saddle shape on the inner surface side of the separator 63a.

In this case, the vertical deflection coil 62a is
It is wound around the slot 65a of 1a. The separator 63a has a hole extending in the central axis direction corresponding to the protrusion 66a on the inner surface of the core 61a. The convex portion 66a on the inner surface of the core 61a penetrates the hole of the separator 63a and protrudes toward the inner surface of the separator 63a.
a is wound around the slot 65a.

As described above, the vertical deflection coil 62a and the horizontal deflection coil 64b are connected to the slot 65a of the core 61.
, The deflection efficiency can be increased.
However, according to the structure in which the horizontal deflection coil 64a is wound around the slot 65a of the core 61a, the winding position of the horizontal deflection coil 64a is regulated by the slot 65a. It was difficult to obtain a good convergence performance.

To solve this problem, the conventional deflection yoke 60 is shown in FIGS.
Has been proposed.

FIG. 9A shows a cross section of the deflection yoke 60b cut in a direction perpendicular to the center axis direction, and FIG.
Shows a section taken along line bb 'in FIG. As shown,
The deflection yoke 60b has a slot 65 extending in the central axis direction.
b, a core 61b formed continuously in the inner circumferential direction;
A vertical deflection coil 62b wound in a saddle shape around the core 61b, a separator 63b disposed on the inner surface side of the vertical deflection coil 62b, and a horizontal deflection coil 64b wound in a saddle shape on the inner surface side of the separator 63b. Have been.

In this case, the vertical deflection coil 62b is wound around a slot 65b of the core 61b. However, unlike the deflection yoke 60a shown in FIG. 6, the separator 63b is not provided with a hole corresponding to the protrusion 66b on the inner surface of the core 61b. Therefore, the convex portion 66b on the inner surface of the core 61b is in contact with the outer surface of the separator 63b, so that the horizontal deflection coil 64b is not wound around the slot 65b of the core 61b.

[0010]

By configuring the deflection yoke 60 as shown in FIG. 9, the winding position of the horizontal deflection coil 64b is not restricted by the slot 65b, and the degree of freedom of the magnetic field distribution by the horizontal deflection coil 64b is not restricted. And it becomes easy to obtain good convergence performance.

However, the problem that the horizontal deflection coil 64b is not in contact with the core 61b having high thermal conductivity and the heat generated by the horizontal deflection coil 64b is large is a major obstacle to high-frequency scanning and wide-angle deflection.

In view of the above, the present invention provides a deflection yoke which suppresses heat generation of the horizontal deflection coil while maintaining the degree of freedom of the magnetic field distribution by the horizontal deflection coil.

[0013]

According to the present invention, there is provided a deflection yoke comprising: a core having a slot extending in the direction of a central axis formed continuously in an inner circumferential direction; a vertical deflection coil wound around the slot of the core; It consists of a separator arranged on the inner surface side of this vertical deflection coil and a horizontal deflection coil wound on the inner surface side of this separator, and this separator has a hole extending in the direction of the central axis corresponding to the projection on the inner surface of the core. The core is formed such that the convex portion on the inner periphery of the core penetrates a hole formed in the separator and contacts the outer diameter portion of the horizontal deflection coil or slightly enters the horizontal deflection coil. is there.

In the present invention, basically, the vertical deflection coil is wound around the core slot, but the horizontal deflection coil is not wound around the core slot. Therefore, the winding position of the horizontal deflection coil is not restricted by the slot of the core. In addition, the convex portion on the inner periphery of the core penetrates a hole formed in the separator and is in contact with the horizontal deflection coil or slightly enters the horizontal deflection coil. Therefore, the heat generated by the horizontal deflection coil is released to the outside through the core having good thermal conductivity.

[0015]

FIG. 1 shows a cathode ray tube device as an embodiment. This cathode ray tube (CRT: Catod)
e-Ray Tube) 10 has a funnel 10b and a neck 1
0a, and the deflection yoke 2 is attached to the funnel 10b.
0 is arranged.

The deflection yoke 20 is constructed by winding a vertical deflection coil and a horizontal deflection coil around a core. For example, each coil is wound in a saddle shape. As is well known, a sawtooth current having a horizontal deflection cycle flows through the horizontal deflection coil and a sawtooth current having a vertical deflection cycle flows through the vertical deflection coil, and the electron gun ( R (red), G (green), B (blue) from
Are deflected in up, down, left, and right directions.

The deflection yoke 20 includes a core 21 having slots extending continuously in the tube axis direction formed continuously in the circumferential direction, a horizontal deflection coil 23, a vertical deflection coil 24, and a separator 22.

FIG. 2A shows a cross section of the deflection yoke 20 cut in a direction perpendicular to the central axis direction (the tube axis direction of the cathode ray tube 10). FIG. 2B shows a cross section taken along the line cc 'in FIG. 2A. . As shown in the figure, the deflection yoke 20 includes a core 21 in which a slot 25 extending in the center axis direction is continuously formed in the inner circumferential direction, a vertical deflection coil 22 wound around the core 21 in a die shape, A separator 23 disposed on the inner surface side of the vertical deflection coil 22;
Horizontal deflection coil 2 wound around the inner surface side of 3
And 4.

In this case, the vertical deflection coil 22 is
Is wound around the slot 25. The separator 23 has a hole 27 extending in the central axis direction corresponding to the convex portion 26 on the inner surface of the core 21. And core 2
The inner convex portion 26 penetrates the hole of the separator 23 described above, and comes into contact with the outer diameter portion of the horizontal deflection coil 24.

FIG. 3A is a view when the core 21 is viewed from the large-diameter side, and FIG. 3B is a cross-sectional view taken along the line dd 'in FIG. 3A. The core 21 is formed in a truncated cone shape as a whole. As described above, the core 21 is formed with the slot 25 extending in the central axis direction continuously in the inner circumferential direction. In this case, the slot 25 is continuous from the large diameter side to the small diameter side.

On the outer surface of the core 21, a projection 28a is formed corresponding to the slot 25 on the inner surface.
A slight unevenness is provided so as to form the concave portion 28b corresponding to 6. Thus, the pressure distribution difference during core pressing can be reduced, the firing deformation can be reduced, the surface area of the core 21 can be increased, and the heat radiation effect of the core 21 can be enhanced.

Since the core 21 is in contact with the horizontal deflection coil 24, a ferrite (Mg-Zn) having a high electric resistance is used.
System), but ferrite (M
(n-Zn system) can also be used by coating the surface with a thin insulating film.

FIG. 4 is a side view of the separator 23. The separator 23 is formed in a truncated cone shape as a whole. The separator 23 includes a front bend portion 23.
Separator body 23a in which c and body 23b are integrated
And a rear bend portion 23d having a screw portion 23e. The separator main body 23a and the rear bend portion 23d can be integrated by the screw portion 23e. Separator 23
The body portion 23b has a hole 27 extending in the central axis direction corresponding to the convex portion 26 on the inner surface of the core 21 as described above.

When the core 21 is a non-split core, the deflection yoke 20 is manufactured by the following steps. First, the vertical deflection coil 2 is inserted into the slot 25 of the core 21.
2 is wound. Next, the separator 23 is arranged on the inner surface side of the vertical deflection coil 22. In this case, the projections 26 of the core 21 are attached so as to pass through the holes 27 of the separator 23. Next, a horizontal deflection coil 24 is wound around the inner surface of the separator 23.

As described above, in the deflection yoke 20 according to the present embodiment, the vertical deflection coil 22 is
Of the horizontal deflection coil 2
4 is not wound around the slot 25 of the core 21. Therefore, the winding position of the horizontal deflection coil 24 is
, The degree of freedom of the magnetic field distribution of the horizontal deflection coil 24 can be secured.

The projection 26 on the inner periphery of the core 21 penetrates a hole 27 formed in the separator 23 and comes into contact with the outer diameter of the horizontal deflection coil 24. Therefore, the heat generated by the horizontal deflection coil 24 is released to the outside via the core 21 having good thermal conductivity. Thereby, heat generation of the horizontal deflection coil 24 can be suppressed, which is suitable for high-frequency scanning and wide-angle deflection.

As described above, the horizontal deflection coil 24
When the heat generated in step (1) is released outside through the core 21, the temperature of the core 21 rises. Generally, core core loss decreases at high temperatures. Therefore, in the present embodiment, there is an advantage that the core loss of the core 21 can be reduced by the heat generated in the horizontal deflection coil 24.

In the embodiment described above, the slot 25 on the inner surface of the core 21 constituting the deflection yoke 20 is formed continuously from the large diameter side to the small diameter side.

However, when the slot 25 is provided on the small diameter side, the copper loss of the coil is limited, and the copper loss of the vertical deflection coil may increase. Therefore, as shown in FIG. 5, the slot 25 on the inner surface of the core 21 may not be provided on the small diameter side. In this case, the copper wire constituting the coil has a very high thermal conductivity, and particularly has a high transmission in the winding direction, so that the heat generated by the horizontal deflection coil 24 not in contact with the convex portion 26 of the core 21 can be sufficiently absorbed. Can be released.

In the above embodiment, the core 2
In FIG. 6, the protrusion 26 on the inner surface is in contact with the outer diameter of the horizontal deflection coil 24 via the separator 25. However, as shown in FIG. You may do it.

Although the horizontal deflection coil and the vertical deflection coil are wound in a saddle type, the present invention can be similarly applied to a horizontal deflection coil wound in a saddle type and the vertical deflection coil is wound in a toroidal type. .

[0032]

According to the present invention, a vertical deflection coil is wound around a slot of a core continuously formed in the inner surface circumferential direction, a separator is provided on the inner surface side, and a horizontal deflection coil is provided on the inner surface side of the separator. In the deflection yoke, the protrusion on the inner surface of the core penetrates through the hole of the separator and contacts or slightly enters the outer diameter of the horizontal deflection coil, so that heat generated from the horizontal deflection coil is The heat is emitted to the outside through the core having a high conductivity to suppress heat generation of the horizontal deflection coil.

Thus, the winding position of the horizontal deflection coil is not restricted by the slot, the degree of freedom of the magnetic field distribution of the horizontal deflection coil can be secured, and this is suitable for widening the angle of high-frequency scanning and deflection scanning. Further, the core loss due to the heat generated by the horizontal deflection coil can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a cathode ray tube device as an embodiment of the present invention.

FIG. 2 is a sectional view of a deflection yoke in the embodiment.

FIG. 3 is a diagram showing a shape of a core in the embodiment.

FIG. 4 is a diagram showing a shape of a separator in the embodiment.

FIG. 5 is a diagram showing a shape of a core according to another embodiment.

FIG. 6 is a cross-sectional view of a deflection yoke according to another embodiment.

FIG. 7 is a diagram showing a conventional cathode ray tube device.

FIG. 8 is a sectional view of a deflection yoke in which a horizontal deflection coil and a vertical deflection coil are wound in a slot.

FIG. 9 is a sectional view of a deflection yoke in which a vertical deflection coil is wound in a slot.

[Explanation of symbols]

10 ... Cathode tube, 10a ... Neck, 10b
..Funnel part, 20 ... deflection yoke, 21 ...
Core, 22: vertical deflection coil, 23: separator, 24: horizontal deflection coil, 25: slot,
26: convex part, 27: hole

Claims (4)

[Claims] 1. A core in which a slot extending in the direction of a central axis is continuously formed in a circumferential direction on an inner surface, a vertical deflection coil wound around a slot of the core, and a separator disposed on an inner surface side of the vertical deflection coil. And a horizontal deflection coil wound around the inner surface of the separator. The separator has a hole extending in the central axis direction corresponding to the protrusion on the inner surface of the core. The deflection yoke is characterized in that the portion penetrates a hole formed in the separator and is in contact with the outer diameter portion of the horizontal deflection coil or slightly enters the horizontal deflection coil. 2. The deflection yoke according to claim 1, wherein a convex portion and a concave portion are formed on an outer surface of the core corresponding to a slot and a convex portion of the inner surface, respectively. 3. The deflection yoke according to claim 1, wherein the slot is formed on a larger diameter side than an intermediate portion of the core. 4. A core in which a slot extending in the direction of the central axis is continuously formed in the circumferential direction on the inner surface, a vertical deflection coil wound around the slot of the core, and a separator disposed on the inner surface side of the vertical deflection coil. And a horizontal deflection coil wound on the inner surface side of the separator. The separator has a hole formed in the center axis direction corresponding to the convex portion on the inner surface of the core, and a convex portion on the inner periphery of the core. A part which penetrates a hole formed in the separator and which is in contact with the outer diameter part of the horizontal deflection coil, or which is slightly inserted into the horizontal deflection coil, wherein the core is an undivided core And the separator can be divided into two in the central axis direction. First, a vertical deflection coil is wound around a slot of the core,
Next, the separator is arranged on the inner surface side of the vertical deflection coil so that the projection of the core penetrates the hole, and then the horizontal deflection coil is wound around the inner surface side of the separator. A method of manufacturing a deflection yoke.