JPS62163244A - Coil for deflection yoke - Google Patents

Abstract

PURPOSE:To enhance the uniformity of a deflecting magnetic field, by shaping a saddle-shaped coil for a deflection yoke in such a manner that wires are wound in a trued-up state as a thin plate and a funnel-shaped portion and coupled portions are bent by 90 deg. inward and outward inversely to each other at conjoined portions. CONSTITUTION:A plurality of enameled copper wires or the like are wound in a trued-up state in such a form that a front-end coupled portion 1, a rear-end coupled portion 2 and the funnel-shaped portion 3 of a right or a left deflecting magnetic field generation sections are linked to each other at four conjoined portions 4 as a thin plate. After that, the funnel-shaped portion 3 is turned by about 90 deg., the coupled portions 1, 2 are turned by about 90 deg. in the opposite direction thereto and the conjoined portions 4 are twisted by about 180 deg. so that a saddle-shaped coil for a deflection yoke is manufactured. Two such coils are combined with each other to constitute the yoke. For these reasons, the enameled copper wires or the like are not disturbed out of the trued-up state but kept in a prescribed wound state to improve the symmetry and uniformity of a deflecting magnetic field to reduce the distortion of an image.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a deflection yoke coil used in television receivers and the like.

2. Description of the Related Art Conventionally, this type of deflection yoke coil has a structure as shown in FIG. In FIG. 5, 6 is a front end connecting portion, 7 is a rear end connecting portion, and 8 is a morning glory-shaped portion.

A deflection magnetic field is formed by combining two of these deflection yoke coils.

Problems to be Solved by the Invention However, with this type of structure, a self-welding copper wire is wound around a saddle-shaped mold and fused to form a saddle-shaped coil. It is impossible to control the alignment of the self-fusing copper wire in the gap between the winding and the winding due to changes in the sliding condition of the mold surface, ambient temperature, humidity, surface condition of the copper wire, tension, etc. Conditions were constantly changing, making it impossible to wind the wire uniformly. Therefore, in the past, the symmetry of the deflection magnetic field was poor, resulting in electron beam distortion on the fluorescent screen, raster distortion,
This was causing misconvergence.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a deflection yoke coil that can prevent uneven winding of copper wire and obtain a good beam spot, a good raster shape, and less misconvergence.

Means for Solving the Problems The technical means of the present invention for solving the above problems is to wind saddle-shaped coils in a flat plate shape, and then connect the bollard-shaped portion and the connecting portion to the inner and outer sides at the connecting portion, respectively. 9 so that it is in the opposite direction of
It has a configuration in which it is bent and molded in increments of 0.00.

action The effect of this technical means is as follows.

That is, the position of each winding copper wire of the deflection yoke coil is always located at a fixed location even if there are a plurality of windings in the morning glory portion, the connecting portion, and the connecting portion. Therefore, the overall deflection magnetic field formed by the current flowing through each copper wire always has the same distribution shape, and even when configured as a pair of saddle-shaped coils, the magnetic field shape is extremely symmetrical and uniform. It is possible to form a deflection magnetic field with good properties.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIG. 2, the front end connecting portion 1. The rear end connecting portion 2 and the morning glory-shaped portions 3 of the left and right deflection magnetic field forming portions are connected in a flat plate shape by four connecting portions 4, that is, one or more enamelled copper wires are wound in an array as shown in Fig. 2. As shown in FIGS. 1 and 4, the two morning glory-shaped portions 3 are rotated approximately 90 degrees, and the connecting portion 1.2 is rotated approximately 900 degrees in the opposite direction to form the connecting portion 4.
As shown in FIG. 4, the 18Q0 coil is twisted to form a saddle-shaped deflection yoke coil, and two of these coils are combined to form a deflection yoke. Note that 5 is an insulating coated copper wire having a cement layer.

In FIG. 2, the front end connecting portion 1 and the rear end connecting portion 2 form an arc shape along the cylindrical portion of the deflection yoke coil, and the bosh-shaped portion 3
is a curved line that follows the curve of the bow-shaped portion of the deflection yoke coil. Therefore, even after 900 twists are formed in the connecting portion 4, the winding conditions of the connecting portions 1, 2 and the morning glory portion 3 do not change at all, and the saddle-shaped deflection yoke coil is formed using aligned windings. This saddle-shaped deflection yoke coil is
As shown in the figure, a pair of wires such as enamelled copper wires that form the saddle-shaped deflection yoke coil are combined to form a deflection yoke. Therefore, the alignment shown in Figure 2 of the wire materials such as enamelled copper wires that form the saddle-shaped deflection yoke coil is always in a constant winding state without being disturbed. Therefore, the deflection magnetic field distribution formed by the pair of deflection yoke coils also always has a constant shape, and the deflection that occurs when the position of the winding copper wire shifts due to twisting or disturbance of the winding. Problems such as magnetic field inhomogeneity are eliminated.

Effects of the Invention As described above, in the present invention, the deflection yoke coil for electron beam deflection is composed of a saddle-shaped coil in which copper wire such as enamelled copper wire is wound in alignment. The distribution state of the deflection magnetic field is always uniform and there is very little variation, so when the deflection yoke is attached to the cathode ray tube and deflected, it is possible to deflect the electron beam with very little Lascou's horizontal and vertical asymmetrical distortion, deflection distortion, and misconvergence. Moreover, it also has the advantage of shortening the adjustment time when combined with a cathode ray tube, making it an industrially valuable device.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an embodiment of the coil I for a deflection yoke of the present invention, Fig. 2 is a top view of the coil before it is formed into a saddle shape, and Fig. 3 is a cross section of the main part of the coil. 4 are perspective views showing details of the wire bending portion of the saddle-shaped coil of the present invention, and FIG. 5 is a perspective view of one deflection yoke coil showing a conventional example. DESCRIPTION OF SYMBOLS 1... Front end connection part, 2... Rear end connection part, 3... Morning glory-shaped part, 4... Connection part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 5

Claims (1)

[Claims] The two approximately semi-circular arc-shaped parts of the front end connecting part and the rear end connecting part and the two morning glory-shaped parts of the deflection magnetic field forming part are arranged in a flat plate shape through the connecting part, and the self-fused copper wire is aligned or the winding is not disordered. The above-mentioned two morning glory-shaped parts are each bent at approximately 90 degrees in the same direction at the connecting part, and the front and rear end connecting parts are each bent at approximately 90 degrees in the opposite direction to the morning glory-shaped part at the joint part. Coil for deflection yoke.