JPH07302554A - Deflection yoke - Google Patents

Abstract

PURPOSE:To stabilize a convergence characteristic by stabilizing the coil distribution of a deflection coil in a deflection yoke formed by directly winding the deflection coil to be arranged on the core of a magnetic substance around a saddle-shaped coil bobbin of an insulator. CONSTITUTION:Winding grooves 7 in which a bottom surface 7b in a V shape to the center is formed, are arranged in the shape of a coil bobbin 8 round which a copper wire is wound. Thereby, the copper wire is successively 'concentrated in the constant direction in order from a lower position of the bottom surface 7b of the winding grooves 7, and the coil distribution is stabilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke mounted on a cathode ray tube of a television receiver or the like.

[0002]

2. Description of the Related Art A deflection yoke for generating a deflection magnetic field for deflecting an electron beam mounted on a cathode tube is basically constructed by disposing a deflection coil in a core of a magnetic material such as ferrite. Various measures have been taken to improve characteristics, stabilize quality performance, and improve productivity (see, for example, Japanese Patent Laid-Open No. 4-47634).

A conventional deflection yoke will be described below. As shown in FIG. 3, the electromagnetic deflection system has a magnetic core 4 in which the deflection coils of the horizontal deflection coil 2 and the vertical deflection coil 3 are wound in order to scan the fluorescent screen within the cathode tube 1 with an electron beam. The deflection yoke is held and disposed by the holder 5 on the neck side and the holder 6 on the opening side so as to surround the outside of the tube near the contact portion between the funnel of the cathode tube 1 and the neck.

As shown in FIGS. 4 and 5, a deflection coil copper wire is directly wound on a square coil winding frame 8 formed with a winding groove 7 mounted on a core 4 to prevent variations in winding distribution. The size is reduced to reduce the change in convergence characteristics. Reference numeral 7a in the drawing denotes the bottom surface of the nip portion of the winding groove 7.

[0005]

However, in the above-mentioned conventional configuration, the bottom surface 7 of the nip portion of the winding groove 7 of the coil winding frame 8 is formed.
Since a is a plane, there is a problem that the copper wire is not concentrated in a certain direction in the order of winding, the winding distribution becomes unstable, and the convergence characteristic changes.

The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a deflection yoke in which the winding distribution of the deflection coil is stabilized and the convergence characteristic is stabilized.

[0007]

In order to achieve this object, a deflection yoke of the present invention is a coil winding frame for winding a copper wire in a winding groove having a V-shaped or concave curved bottom surface with respect to the center. It has a formed configuration.

[0008]

In this structure, the copper wire wound around the coil winding frame is sequentially concentrated in a fixed direction in the winding order from the lower position of the bottom surface of the winding groove, and the winding distribution is stabilized.

[0009]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In one embodiment of the present invention, the same components as those described in the above-mentioned conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, the feature of this embodiment is that the bottom surface 7b of the nip portion of the winding groove 7 of the coil winding frame 8 is V-shaped with respect to the center in the above-described conventional structure. is there. That is, when the width of the winding groove 7 is w, the inclination is such that the center position w / 2 is lowered. Depth d of bottom surface 7b
Is d = 2 s / w, where s is the cross-sectional area wound around the bottom surface 7b of the plurality of copper wires 9.

With this configuration, the copper wire 9 wound around the coil winding frame 8 slides to the center of the bottom surface 7b of the winding groove 7 at a low position, and is sequentially wound in a winding direction in a concentrated manner. ,
The deflection coil has a stable winding distribution, and a deflection yoke having a stable convergence characteristic can be obtained.

(Second Embodiment) A second embodiment of the present invention will be described below.

As shown in FIG. 2, the feature of this embodiment is that the bottom surface 7b of the first embodiment is a concave bottom surface 7c. That is, when the cross-sectional area of the plurality of copper wires 9 wound around the bottom surface 7c of the winding groove 7 is s, the bottom surface 7c
The radius r of is (Equation 2).

[0015]

[Equation 2]

With this configuration, the copper wire 9 slides on the coil winding frame 8 toward the center of the concave curved surface of the bottom surface 7c of the winding groove 7,
The same effect as that of the first embodiment can be obtained.

[0017]

As is apparent from the above description, according to the present invention, the winding groove having the V-shaped or concave curved bottom surface with respect to the center is formed in the coil winding frame for winding the copper wire. It is possible to realize an excellent deflection yoke in which the winding distribution of the deflection coil is stabilized and the convergence characteristic is stable.

[Brief description of drawings]

1A is a perspective view of a main part of a coil winding frame of a deflection yoke according to a first embodiment of the present invention, FIG. 1B is a cross-sectional view taken along the line aa ′ of FIG. 1A, and FIG. Cross-sectional view of the main part showing the winding state

FIG. 2 (a) is a cross-sectional view of an essential part showing a state in which a copper wire is wound around a coil bobbin of a deflection yoke according to a second embodiment of the present invention. FIG. 2 (b) is a schematic cross-sectional view of an essential part of the coil bobbin.

FIG. 3 is a partial cross-sectional view of a conventional deflection yoke.

FIG. 4 is an external perspective view showing a state in which a coil winding frame is attached to the core of the deflection yoke.

FIG. 5A is a perspective view of a main part of the coil winding frame, and FIG. 5B is a sectional view taken along the line bb ′ of FIG.

[Explanation of symbols]

 7 winding groove 7b, 7c bottom surface 8 coil winding frame

Claims (4)

[Claims] 1. A deflection yoke formed by directly winding a deflection coil arranged on a magnetic core around an insulator-shaped coil winding frame, and having a V-shaped bottom face with respect to the center. A deflection yoke, wherein: is formed on the coil winding frame. 2. The depth d of the V-shaped bottom surface of the winding groove is d = 2 s /, where w is the width of the winding groove and s is the cross-sectional area of a plurality of windings wound around the bottom surface. w which is w
Deflection yoke as described. 3. A deflection yoke which is formed by directly winding a deflection coil arranged on a magnetic core around an insulator-shaped coil winding frame, wherein a winding groove having a concave curved bottom surface is formed in the coil winding. A deflection yoke characterized by being formed in a frame. 4. The radius of curvature r of the concave curved surface of the winding groove is defined as s, where s is the cross-sectional area of a plurality of windings wound around the bottom surface.
The deflection yoke according to claim 3, wherein [Equation 1]