JP2004296310A - Deflection yoke - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deflection yoke with less power consumption by making a turning over part of an electron gun side rear end part of the horizontal deflection coil a bend-up-less type winding without elongating a total length of the horizontal deflection coil and the deflection yoke. <P>SOLUTION: This is of a bend-up-less type structure in which the turning over part of the electron gun side rear end part 9 of the horizontal deflection coil 1 does not have a vertical turning over face to a cathode-ray tube shaft direction, and by enlarging a diameter of an outer side face of the electron gun side rear end part 9 of the horizontal deflection coil 1, the bend-up-less winding in which an effective length A and a total length B are made the same as those of a conventional horizontal deflection coil 1 is realized. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a deflection yoke used for a color television receiver, a computer display monitor, a cathode-ray tube three-tube type projection receiver, a projector projector, and the like.
[0002]
[Prior art]
The deflection yoke deflects the electron beam emitted from the electron gun of the cathode ray tube to display a screen, and has a pair of horizontal deflection coils and a pair of vertical deflection coils.
[0003]
Hereinafter, a conventional deflection yoke will be described. 7 is a perspective view of a conventional horizontal deflection coil with a bend and a vertical deflection coil, FIG. 8 is a sectional view of a conventional deflection yoke with a bend, FIG. 9 is a perspective view of a conventional horizontal deflection coil without a bend, and FIG. Is a top view of a conventional horizontal deflection coil without a bend, FIG. 11 is a side view of a conventional horizontal deflection coil without a bend, FIG. 12 is a diagram showing a positional relationship between a conventional horizontal deflection coil with a bend and a vertical deflection coil, FIG. 13 is a diagram showing a positional relationship between a conventional horizontal deflection coil without a bend portion and a vertical deflection coil.
[0004]
As shown in FIG. 7, the horizontal deflection coil 1 and the vertical deflection coil 2 are combined in a direction perpendicular to each other, and the horizontal deflection coil 1 has a folded portion (hereinafter referred to as a bend portion) 3 at the rear end on the electron gun side. I have.
[0005]
As shown in FIGS. 7 and 8, the bend portion 3 of the horizontal deflection coil 1 has planes 5 and 6 perpendicular to the cathode ray tube axis (the Z axis in FIG. 7). Since it is the same as the traveling direction of the electrons, it does not contribute to the deflection of the electron beam. Therefore, when the bend portion 3 is large, the power consumption of the entire deflection yoke increases. Therefore, as a method of reducing useless lines of magnetic force at the bend portion as much as possible, there is a method in which a winding (so-called bend-upless winding) having no planes 5 and 6 perpendicular to the tube axis direction is used for a horizontal deflection coil (for example, Patent Document 1). , Patent Document 2).
[0006]
As shown in FIGS. 9, 10 and 11, the conventional horizontal deflection coil 1 of bend-upless winding gradually decreases in diameter from the cathode ray tube surface toward the electron gun on both the inner and outer surfaces. Have the same diameter and a constant diameter up to the rear end. In FIG. 10, reference numeral 14 denotes a winding start line of the coil, and 15 denotes a winding end line of the coil.
[0007]
[Patent Document 1]
JP-T-2001-507158 [Patent Document 2]
JP-A-2002-175765
[Problems to be solved by the invention]
In the above-described conventional deflection yoke, the bend portion on the electron gun side of the horizontal deflection coil is changed from the shape having the bend portion 3 shown in FIG. 12 to the shape having no bend portion shown in FIG. If the effective lengths (dimensions A in FIGS. 12 and 13) are made the same, the total length B of the horizontal deflection coil becomes longer, resulting in a problem that the total length of the deflection yoke becomes longer.
[0009]
A ring magnet for adjusting the center of the screen and a velocity modulation coil for adjusting the focus are attached as separate components behind the deflection yoke on the electron gun side, so it is difficult to extend the entire length of the deflection yoke to the rear. In many cases, even if it was desired to introduce a less winding, it could not be introduced.
[0010]
SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, in which the bent portion at the rear end of the horizontal deflection coil at the electron gun side is formed as a bend-upless winding without extending the entire lengths of the horizontal deflection coil and the deflection yoke, thereby reducing power consumption. An object is to provide a small deflection yoke.
[0011]
[Means for Solving the Problems]
The present invention relates to a deflection yoke having a pair of horizontal deflection coils and a pair of vertical deflection coils, wherein a bent portion at the rear end of the horizontal deflection coil on the electron gun side does not have a bent surface perpendicular to the CRT tube axis direction. The shape of the outer surface of the horizontal coil at the folded portion becomes smaller in diameter from the surface of the cathode ray tube toward the electron gun, but becomes larger at the rear end on the electron gun side through the same diameter.
[0012]
An object of the present invention is to provide a deflection yoke that consumes less power by using the above configuration to make the folded portion at the rear end of the horizontal deflection coil on the electron gun side bend-upless winding without extending the entire length of the horizontal deflection coil and the deflection yoke. Can be.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
According to a first aspect of the present invention, there is provided a deflection yoke having a pair of horizontal deflection coils and a pair of vertical deflection coils, wherein the folded portion at the rear end of the horizontal deflection coil at the electron gun side is a folded surface perpendicular to the cathode ray tube axial direction. The outer surface of the horizontal coil at the turn-back portion has a smaller diameter from the cathode ray tube surface direction toward the electron gun, but the diameter at the rear end of the electron gun side through the same diameter portion Great.
[0014]
According to the second aspect of the present invention, the inner surface shape of the vertical deflection coil gradually decreases in diameter from the cathode ray tube surface direction toward the electron gun, and passes through the same diameter portion at the electron gun side rear end. The diameter was large.
[0015]
According to the inventions having the above-described configurations, the bent portion of the horizontal deflection coil at the rear end on the electron gun side is formed as a bend-upless winding without extending the entire lengths of the horizontal deflection coil and the deflection yoke, thereby realizing a deflection yoke with low power consumption. it can.
[0016]
(Embodiment 1)
FIG. 1 is a perspective view of a horizontal deflection coil according to the first embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views of the horizontal deflection coil according to the first embodiment of the present invention, and FIGS. FIG. 3 is a cross-sectional view of a deflection yoke according to the first embodiment.
[0017]
As shown in FIG. 12, the conventional horizontal deflection coil has a bend portion 3, and the dimension which is the effective length contributing to the deflection of the coil is A, and the total length of the coil is B. If this coil is a bend-upless winding having the same effective length, the overall length B becomes longer as shown in FIG. Therefore, as shown in FIG. 3, in the deflection yoke of the present invention, the effective length A and the total length B are the same as those of the conventional coil shown in FIG. The bend-upless winding is made possible.
[0018]
FIG. 4 shows a cross section at a position a in FIG. The thickness 13 of the horizontal deflection coil 1 in the Y-axis direction in the figure is smaller than other portions. FIG. 5 shows a cross section at a position b in FIG. Since the diameter of the outer surface of the coil is larger than that of FIG. 4, the thickness 13 of the horizontal deflection coil 1 on the Y axis is larger than that of FIG.
[0019]
(Embodiment 2)
FIG. 6 is a perspective view showing a combination of the rear end of the horizontal deflection coil and the rear end of the vertical deflection coil according to the second embodiment of the present invention. As shown in FIGS. 12 and 13, in the conventional deflection yoke, the inner surface of the vertical deflection coil 2 is formed along the insulating frame 7 provided outside the horizontal deflection coil 1, and the outer surface of the vertical deflection coil 2 is formed. Are formed along the inner surface of the ferrite core 4 as shown in FIG.
[0020]
As described in the first embodiment, in order to form the horizontal deflection coil into a bend-upless winding without extending the entire length of the deflection yoke, the outer surface of the horizontal deflection coil 1 is enlarged at the rear end 9 on the electron gun side. Therefore, as shown in FIG. 3, the diameter of the rear end 9 of the insulating frame 7 on the electron gun side also needs to be increased.
[0021]
Increasing both the inner diameter and outer diameter of the vertical deflection coil increases the size of the ferrite core, which increases the cost of the ferrite core and lowers the deflection efficiency. Therefore, in the deflection yoke of the present invention, as shown in FIG. Only the inner diameter of No. 10 was increased to make the outer diameter unchanged. This enables the ferrite core to have the same inner diameter as the conventional deflection yoke.
[0022]
【The invention's effect】
As described above, the present invention extends the entire length of the deflection yoke by increasing the outer surface of the rear end of the horizontal deflection coil on the electron gun side and increasing the inner surface of the rear end of the vertical deflection coil on the electron gun side. Instead, the horizontal deflection coil can be a bend-upless winding, and a deflection yoke with low power consumption can be realized.
[Brief description of the drawings]
FIG. 1 is a perspective view of a horizontal deflection coil according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of a horizontal deflection coil according to Embodiment 1 of the present invention. FIG. FIG. 4 is a cross-sectional view of a deflection yoke according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view of a deflection yoke according to the first embodiment of the present invention. FIG. 7 is a perspective view showing a combination of a rear end portion of a horizontal deflection coil and a rear end portion of a vertical deflection coil. FIG. 7 is a perspective view of a conventional horizontal deflection coil having a bend portion and a vertical deflection coil. FIG. 9 is a perspective view of a conventional horizontal deflection coil without a bend. FIG. 10 is a top view of a conventional horizontal deflection coil without a bend. FIG. 11 is a side view of a conventional horizontal deflection coil without a bend. FIG. 12: Conventional bend part Figure [EXPLANATION OF SYMBOLS] showing the FIG. 13 position relationship without conventional bend horizontal deflection coil and the vertical deflection coil showing the positional relationship between the horizontal deflection coil and the vertical deflection coil
1 horizontal deflection coil 2 vertical deflection coil 3 folded part (bend part)

Claims (2)

A deflection yoke having a pair of horizontal deflection coils and a pair of vertical deflection coils, wherein a bent portion at the rear end of the horizontal deflection coil on the electron gun side has a bend-upless structure having no folded surface perpendicular to the CRT tube axis direction. The deflection is characterized in that the shape of the outer surface of the horizontal coil of the folded portion becomes smaller from the cathode ray tube surface direction toward the electron gun, but becomes larger at the electron gun side rear end through the same diameter portion. yoke. The inner surface shape of the vertical deflection coil gradually decreases in diameter from the cathode ray tube surface direction toward the electron gun, but increases in diameter at the electron gun side rear end through the same diameter portion. Item 2. The deflection yoke according to Item 1.

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