JP2000156179A - Deflecting yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide with a simple means a deflecting yoke capable of forming a horizontal deflecting magnetic field in tendency magnetic field distribution, capable of pin magnetic field, while improving the deflecting efficiency of the deflecting yoke. SOLUTION: A magnetic core 1 is formed with sides A1, a1, A2, a2,..., A(N-1), a(N-1), AN, aN and B1, b1, B2, b2,..., B(N-1), b(N-1) in a cross section of the magnetic core 1 cut in a vertical surface with respect to the X-axis being parallel with each other at any one of upper and lower parts and any one of right and left parts or at opposite sides in the upper and lower, the right and left sides, and the sides A1, a1, A2, a2,..., A(N-1), a(N-1), AN, aN are formed at nearly right angles with respect to a center O of the cross section of the magnetic material core 1, and the coil part of at least one pair of vertical deflecting coils is housed in plural grooves C1, c1, C2, c2,..., C(N-1), c(N-1) (N is an integer lager than or equal to 2).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke capable of easily improving the deflection efficiency of a vertical deflection coil and a horizontal deflection coil without changing the L / R of a vertical deflection coil and a horizontal deflection coil.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view showing a configuration of a deflection yoke in which a horizontal deflection coil and a vertical deflection coil conventionally used are both saddle type coils. In the drawing, reference numerals 5 and 5 denote horizontal deflection coils each formed of a saddle type coil. A pair of coil deflection plates 5 and 5 are housed on the inner peripheral surfaces of the pair of coil separators 7 and 7, respectively. A pair of vertical deflection coils 6 and 6 are disposed on the outer peripheral surface of the reference numeral 7. A pair of magnetic cores 1B, 1 are provided on the outer peripheral surfaces of the pair of vertical deflection coils 6, 6.
B is provided.

It is a well-known fact that the deflection efficiency of the horizontal deflection coils 5, 5 and the vertical deflection coils 6, 6 generally improves as the inner diameter of the magnetic cores 1B, 1B decreases. In the above-described deflection yoke, at least the thickness of the coil separators 7, 7 and the vertical deflection coils 6,
6 is added to the inner diameter of the magnetic cores 1B, 1B, so that the deflection efficiency of the horizontal deflection coils 5, 5 and the vertical deflection coils 6, 6 is improved.
Actually, it was extremely difficult to reduce the inner diameters of B and 1B. Therefore, in practical use, means for reducing the coil thickness of each of the horizontal deflection coils 5, 5 and the vertical deflection coils 6, 6 to reduce the inner diameter of the magnetic cores 1B, 1B has been adopted.

However, when the thickness of each of the horizontal deflection coils 5, 5 and the vertical deflection coils 6, 6 is reduced, the L / R of the horizontal deflection coils 5, 5 and the vertical deflection coils 6, 6 deteriorates. In addition, it is difficult to set the coil winding distribution or the like, and it is difficult to suppress the convergence characteristics and distortion characteristics, which are the original characteristics of the deflection yoke, to required values.

In order to solve this problem, a deflection yoke using an elliptical magnetic core 1A as shown in FIG. 2 has been proposed. The magnetic core 1A includes a plurality of grooves C1 and accommodating winding portions of a pair of vertical deflection coils.
c1, C2, c2, C3, c3, C4, and c4 are provided, and the inner peripheral sides A1 opposed to each other above and below a cut surface obtained by cutting the magnetic core 1A along a plane perpendicular to the X axis. , A1, A2, a2, A3, a3, A4, a4, A
5, a5 and B1, b1, B2, b2, B3, b3,
B4 and b4 are formed in parallel. This magnetic core 1A
According to the deflection yoke using the method, the deflection efficiency can be improved as compared with the conventional deflection yoke.

[0006]

However, as described above, a plurality of grooves for accommodating the vertical deflection coil are provided, and the magnetic core is cut on the inner peripheral side of a cut surface perpendicular to the X axis. In a deflection yoke whose opposing sides are parallel, the magnetic field radiated from the tip of the magnetic core, which is the groove end, can have a very strong effect on the magnetic field shape (pin magnetic field or barrel magnetic field) of the deflection yoke. confirmed. And although the deflection efficiency can be improved, the magnetic field shape becomes linear (uniform magnetic field), so it has been difficult to form, for example, a horizontal deflection magnetic field of a self-convergence type deflection yoke into a magnetic field distribution that tends to be a pinned magnetic field. For this reason, if the tip side of the magnetic core is made to have a curved shape like a conventional magnetic core in order to make the horizontal deflection magnetic field a magnetic field distribution that tends to be a pin magnetic field, there has been a problem that the deflection efficiency deteriorates.

It is an object of the present invention to provide a deflection yoke which can improve the deflection efficiency of a deflection yoke by simple means and can form a horizontal deflection magnetic field into a pinned magnetic field distribution.

[0008]

A pair of horizontal deflection coils disposed on the inner peripheral surface of the coil separator, a pair of vertical deflection coils disposed on the outer peripheral surface of the coil separator, and an opening shape disposed outside the vertical deflection coil. Is a deflection yoke including a magnetic core provided with a plurality of grooves in a circular, elliptical, or quadrangular shape, wherein the magnetic core 1 includes:
Sides A1, a1, A2, a2, ──A (N
-1), a (N-1), AN, aN and B1, b1,
B2, b2, ──B (N-1), b (N-1), and parallel sides A1, a1, A2, a2, ──A (N
-1), a (N-1), AN, aN are formed so as to be substantially perpendicular to the center O of the cut surface of the magnetic core 1, and a plurality of grooves C1, c1, C2, c2,. (N-
1) and c (N-1) (N is an integer of 2 or more) are formed so as to accommodate at least the winding portions of a pair of vertical deflection coils.

According to the present invention, the inner diameter of the magnetic core can be substantially reduced by providing a plurality of grooves for accommodating the winding portion of the vertical deflection coil in the magnetic core (the inner diameter of the core is set outside the coil separator). It is also possible to adjust the deflection efficiency of the horizontal deflection coil and the vertical deflection coil. In addition, the opposite parallel sides of the cut surface of the magnetic core are formed so as to be substantially perpendicular to the center of the cut surface of the magnetic core. It becomes possible to make the magnetic field distribution tend.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to FIG. FIG. 1 is a sectional view showing the configuration of a magnetic core used in the present invention. Note that the present invention is not limited by this.

Referring to FIG. 1, reference numeral 1 denotes a magnetic core having an elliptical opening, and a plurality of grooves C1, c1, C2, c2, and C for accommodating a pair of saddle-type vertical deflection coils.
3, c3, C4, and c4 are provided. Also, A1,
a1, A2, a2, A3, a3, A4, a4, A5, a
5 and B1, b1, B2, b2, B3, b3, B4
b4 are opposite sides on the upper and lower inner peripheral sides of a cut surface obtained by cutting the magnetic core 1 along a plane perpendicular to the X axis, and are formed to be parallel to each other. And these parallel sides A1, a1, A2, a2, A3, a3, A4
Each of a4, A5, and a5 is formed so as to be substantially perpendicular to the center O of the cut surface of the magnetic core 1. In addition,
Although a detailed description is omitted, the magnetic core 1 is also provided with a plurality of grooves for accommodating the winding portions of the saddle type horizontal deflection coil.

In the magnetic core 1 thus configured, the inner diameter of the magnetic core 1 in the vertical axis (YY) direction is reduced, and the inner diameter of the magnetic core 1 is 4 to 6 m as compared with the conventional one.
m smaller. As a result, the deflection efficiency of the horizontal deflection coils 5, 5 has been greatly improved.

Further, by using this magnetic core 1,
Opposite sides A on the tip side of the magnetic core 1 to be grooved
1, a1, A2, a2, A3, a3, A4, a4, A
The magnetic field radiated from 5, 5 can be formed into a magnetic field distribution that tends to be a pin magnetic field, and it is possible to easily cope with a self-convergence type deflection yoke.
The sides A1, a1, A2, a2, A
3, a3, A4, a4, A5, and a5 are formed substantially at right angles to the center O of the cut surface of the magnetic core 1. However, even if the angle with respect to the center O of the cut surface is changed, the shape of the magnetic field is changed to the pin magnetic field. Needless to say, it can be formed into a magnetic field distribution of a tendency, a barrel magnetic field tendency, and a uniform magnetic field. It is also possible to change the shape of the side corresponding to the front end side of the magnetic core 1 which is the groove end in the Z-axis direction of the magnetic core 1 to change the magnetic field distribution before and after the deflection yoke.

In the above description, only the case where the magnetic material core 1 is cut along a plane perpendicular to the X-axis, and only the upper and lower parallel sides on the inner peripheral side of the cut surface and the horizontal deflection magnetic field have been described. The same applies to the case where the side parallel to the left and right direction of the cut surface of the magnetic core 1 and the vertical deflection magnetic field are provided, and the side parallel to each other is provided in both the vertical and horizontal directions of the cut surface of the magnetic core 1. It goes without saying that it is good.

Although the detailed description is omitted, the description has been made on the case where the horizontal deflection coil and the vertical deflection coil are saddle type coils. However, the horizontal deflection coil is a saddle type coil, and the vertical deflection coil is a toroidal type coil. Also in the deflection yoke, since the vertical deflection coil has a space portion corresponding to the mud portion and the rib portion, by using the magnetic core having the same structure as described above, the horizontal deflection coil and the vertical The deflection efficiency of the deflection coil can be improved.

In the case of a deflection yoke in which the horizontal deflection coil is a saddle type coil and the vertical deflection coil is a toroidal type coil, the deflection efficiency is improved and the winding of the toroidal type coil is formed by a groove provided in the magnetic core. Another effect was obtained in that the deformation was prevented and a deflection yoke having a uniform magnetic field distribution was obtained.

Further, in a deflection yoke using a magnetic core having a square or circular opening in the magnetic core,
The effect of improving the deflection efficiency was obtained in exactly the same manner.

[0018]

According to the present invention, the inner diameter of the core can be substantially reduced by simple means merely by changing the structure of the magnetic core, and the deflection efficiency of the horizontal deflection coil and the deflection efficiency of the vertical deflection coil can be greatly increased. Could be improved. In addition, since the horizontal deflection magnetic field shape can be formed into a pinned magnetic field distribution without affecting the convergence characteristics and distortion characteristics, the deflection yoke magnetic field shape is adjusted to the required optimum magnetic field distribution state. It became possible to do.
As a result, an inexpensive deflection yoke excellent in image quality can be provided, and its practical effect is significant.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a magnetic core used in the present invention.

FIG. 2 is a sectional view showing a conventional example of a magnetic core.

FIG. 3 is a sectional view showing a conventional example of a deflection yoke.

[Description of Signs] 1,1A, 1B Magnetic core A1, a1, A2, a2, A3, a3, A4, a4, A
5, a5, B1, b1, B2, b2, B3, b3, B
4, b4 Opposite sides C1, c1, C2, c2, C3, c3, C4, c4 on inner circumferential side of magnetic material core cut surface Groove 5 Horizontal deflection coil 6 Vertical deflection coil 7 Coil separator O Core cut surface center

Claims (1)

[Claims] 1. A pair of horizontal deflection coils disposed on the inner peripheral surface of the coil separator, a pair of vertical deflection coils disposed on the outer peripheral surface of the coil separator, and a circular opening formed on the outer side of the vertical deflection coil. What is claimed is: 1. A deflection yoke comprising a magnetic core provided with a plurality of grooves in an elliptical or square shape, wherein the magnetic core 1 has a cut surface obtained by cutting the magnetic core 1 along a plane perpendicular to the X axis. Sides A1, a1, parallel to one of the upper and lower sides, the left and right sides,
A2, a2, ──A (N-1), a (N-1), AN,
aN and B1, b1, B2, b2, ΔB (N−
1), b (N-1), and the parallel sides A1, a1, A2, a2, ──A (N
-1), a (N-1), AN, aN, and
And a plurality of grooves C1, c1, C2, c2,.
A deflection yoke characterized in that at least (N-1) and c (N-1) (N is an integer of 2 or more) accommodate at least winding portions of a pair of vertical deflection coils.