JPH07211262A - Core for deflecting yoke - Google Patents

Abstract

PURPOSE:To obtain a core for deflecting yoke, which can improve the stability of coil distribution and which can improve the characteristic of a deflecting yoke. CONSTITUTION:Recessed grooves 2 at uneven width and uneven depth are radially formed so as to adjust the coil distribution on the inner surface of a deflecting yoke core main body 1 over from a neck part to an opening part. Since the coil distribution can be freely adjusted inside of the recessed groves 2, characteristic of the distortion convergence can be improved without using a correcting coil, and since the eddy-current loss can be reduced, generation of heat can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke core used in a television receiver or the like.

[0002]

2. Description of the Related Art In recent years, a deflection yoke core having a recessed groove of the same width and the same depth on the inner surface of the core has been adopted in order to improve the deflection sensitivity or stabilize the image quality.

The structure of a conventional deflection yoke core will be described below with reference to FIG. FIG. 7 is an external perspective view of a conventional deflection yoke core. Where 11
Is a core body, and 14 is a concave groove formed on the inner surface of the core body 11 and having the same width and the same depth.

The operation of the deflection yoke core having the above structure will be described below. By winding a copper wire for vertical deflection in the groove 14 having the same width and the same depth on the inner surface of the core body 11, it is possible to reduce variations in the winding, and a magnetic field for horizontal deflection is used for vertical deflection. The eddy current loss generated in the copper wire is reduced and heat generation is suppressed.

[0005]

However, in the above-mentioned conventional structure, since the winding is wound in the concave groove 14 having the same width and the same depth, the winding distribution is changed to finely adjust the magnetic field for improving the distortion and the deviation of the convergence. Therefore, a convergence correction coil is required in order to improve the important convergence characteristics of the deflection yoke characteristics. However, since the convergence correction coil is a loss coil that does not contribute to the deflection, there is a problem that the deflection current increases as compared with the deflection yoke without the correction coil.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a deflection yoke core which satisfies distortion and convergence characteristics and enables winding distribution adjustment.

[0007]

In order to achieve this object, the deflection yoke core of the present invention has a concave groove formed on the inner surface of the core from the neck portion to the opening portion in a radial pattern and having an uneven width and depth. The configuration is provided.

[0008]

According to the present invention, since the winding distribution can be freely adjusted in the groove having the uneven width and depth in the above structure, the characteristics of distortion and convergence can be improved without using the correction coil. Further, since the eddy current loss can be reduced, the heat generation of the deflection yoke core can be reduced.

[0009]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
-It demonstrates, referring FIG.

FIG. 1 is an external perspective view of a deflection yoke core according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 is a core body, and 2 is a concave groove radially formed on the inner surface of the core body 1 from the neck portion to the opening. Assuming that the width of the groove 2 on the neck side is b and the width of the opening side is a, a> b
There is a dimensional relationship.

FIG. 2 is a plan sectional view of the core shown in FIG. 1a. Here, a groove width y and a groove depth x are defined as dimensions for forming the concave groove 2, and the shape and dimension of x and y are determined by winding distribution. (Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
Will be described with reference to.

FIG. 4 is an external perspective view of a deflection yoke core according to a second embodiment of the present invention. In FIG. 4A, 1 is a core body, and 5 is a molded product mounted in a groove 2 (not shown) for regulating winding distribution. FIG. 4B shows a molded product 5 for regulating the winding distribution, which molded product 5 is the core body 1.
It has a regulating piece 5a for regulating the distribution of windings which is adapted to the curve of the groove bottom of the concave groove 2 on the inner surface. This regulation piece 5a
Changes the number depending on the characteristics. (Embodiment 3) FIG. 5 shows a third embodiment of the present invention, which is also provided with a molded product 6 for controlling the winding distribution as shown in the drawing. The molded product 6 has protrusions 6a attached to the upper and lower edges of the concave groove 2 and regulating the winding distribution. At least one projecting piece 6a is attached, and the number thereof is changed according to the characteristics. (Embodiment 4) FIG. 6 shows a fourth embodiment of the present invention, which is also equipped with a molded product 7 for regulating winding distribution as shown in the drawing. This molded product 7 is attached to the middle portion of the concave groove 2 and has at least one projecting piece 7a for regulating the winding distribution, and the number of this projecting piece 7a is determined according to the characteristics.

Next, the operation of the deflection yoke core having the above structure will be described. In each of the above embodiments, the winding 3, that is, the vertical coil is wound as shown in FIG. This vertical coil is a saddle coil, and is regulated by the curve of the vertical coil or the linear product by the concave groove 2 on the inner surface of the core body 1 and the winding distribution regulation molding.

By doing so, the inner diameter of the core body 1 can be narrowed down, the variation in incorporating the vertical coil can be reduced, the eddy current loss generated by the copper wire can be reduced, and heat generation can be suppressed.

[0015]

As is apparent from the above description of each embodiment, the present invention provides a concave groove on the inner surface of the deflection yoke core body that is radial from the neck portion to the opening portion and is not uniform in width and depth. Since the coil is provided, it is possible to freely adjust the winding distribution of the vertical coil, and it is possible to provide a deflection yoke in which distortion and convergence characteristics are improved at low cost without using a correction coil.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a deflection yoke core according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of the deflection yoke core.

FIG. 3 is a perspective view of a deflection yoke core incorporating a winding.

FIG. 4 is an external perspective view of a deflection yoke core according to another embodiment of the present invention.

FIG. 5 is a perspective view of a deflection yoke core according to another embodiment of the present invention.

FIG. 6 is an external perspective view of a deflection yoke core according to another embodiment of the present invention.

FIG. 7 is an external perspective view of a conventional deflection yoke core.

[Explanation of symbols]

 1 core body 2 concave groove 3 winding (vertical coil) 5 molded product for winding distribution regulation 6 molded product for winding distribution regulation 7 molded product for winding distribution regulation

Claims (2)

[Claims] 1. A core used for a deflection yoke for generating a deflection magnetic field for deflecting an electron beam of a cathode ray tube, the core being radial from the neck portion to the opening and having a uniform width and depth. A core for a deflection yoke, which is provided with a non-concave groove. 2. The deflection yoke core according to claim 1, wherein a molded product for winding distribution regulation is provided in the concave groove portion.