JP2682333B2 - Deflection yoke device - Google Patents

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, a CRT display device or the like, and more particularly to a deflection yoke device provided with an auxiliary coil for reducing a magnetic field leaking to the outside. .

[0002]

2. Description of the Related Art A deflection yoke mounted on a cathode ray tube is
15.75KHz to 120KHz for horizontal deflection coil
The horizontal deflection current is supplied to the vertical deflection coil.
A vertical deflection current of 0 Hz is supplied, and the electron beam is deflected by using the horizontal deflection magnetic field and the vertical deflection magnetic field generated from each deflection coil. At this time, a leakage magnetic field is also generated outside the deflection yoke, and of the leakage magnetic field, the horizontal deflection magnetic field becomes unnecessary radiation, and there is a concern that it may affect the human body and high-frequency compatible terminal equipment such as a computer. Due to regulatory movements, it has been required to reduce unnecessary radiation in the deflection yoke itself.

Therefore, in the conventional deflection yoke device, a coil is formed by printed wiring on a horseshoe-shaped flexible substrate as shown in FIG. 6, as in Japanese Utility Model Laid-Open No. 62-155458.
The auxiliary coil 21 bent in a hook shape is attached along the outer side of the horizontal deflection coil to generate a magnetic field in the direction opposite to that of the horizontal deflection coil to cancel and reduce unnecessary radiation. Also, as in Japanese Utility Model Laid-Open No. 63-137446, a coil is wound in a groove 32 of a reel 31 having a combination of two paddles as shown in FIG. 7, and the reel 31 is horizontally deflected. The coil was attached above and below the outer circumference of the coil to generate the above-mentioned magnetic field to reduce unnecessary radiation.

[0004]

However, in the conventional example as shown in FIG. 6, since the coil is formed by the flexible substrate, the shape of the coil becomes unstable and it is difficult to position and attach the coil to the deflection yoke. In addition, there is a problem that it is easily deformed by an external force or the like. Further, in the conventional example as shown in FIG. 7, since the coil is wound on the winding frame 31 having a shape in which two paddles are combined, a large-scale winding device is required, and a three-dimensional winding is required. Had a problem of poor productivity.

[0005]

In order to solve the above-mentioned problems of the prior art, the present invention provides (1) a deflection yoke device having an auxiliary coil for reducing a magnetic field leaking from the deflection yoke to the outside. In the winding frame of the auxiliary coil, the groove provided on the outer periphery of the plate-shaped winding frame portion formed in the substantially elliptical shape is connected to the two opposing positions of the substantially elliptical winding frame portion. And two hinges provided in the vicinity of two connecting portions of the winding frame portion with the winding frame holding portion, and after winding in the groove, Provided is a deflection yoke device characterized in that a part of a plate-shaped winding frame portion is bent by a hinge and is joined to the winding frame holding portion to form the auxiliary coil, and (2) the deflection yoke is externally connected. A deflection yoke device having an auxiliary coil for reducing a leaking magnetic field, comprising: The coil bobbin has a groove provided on the outer periphery of a plate-shaped bobbin part formed in a substantially elliptical shape, and a bobbin holding part that connects two opposing positions of the substantially elliptical bobbin part. And two hinges provided in the vicinity of two connecting portions of the winding frame portion with the winding frame holding portion,
The deflection yoke device is characterized in that the auxiliary coil is fixed to the deflection yoke by fitting the winding frame holding portion to the front side flange of the separator of the deflection yoke.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A deflection yoke device of the present invention will be described below with reference to the accompanying drawings. 1 is a schematic perspective view of a deflection yoke device of the present invention, FIG. 2 is a perspective view showing a winding frame of an auxiliary coil used in the deflection yoke device of the present invention, and FIG. 3 is an auxiliary coil used in the deflection yoke device of the present invention. It is a side view which shows the reel.

First, the winding frame of the auxiliary coil used in the deflection yoke device of the present invention will be described. 2 and 3, the reel 1 is made of resin or the like integrally formed by injection molding or the like. Plate-shaped winding frame front portion 2a and winding frame rear portion 2b
However, they are connected by a thin hinge 3 to form a substantially elliptical winding frame portion 2. In the vicinity of the hinge 3 (in the vicinity of the connecting portion) of the winding frame rear portion 2b, an arch-shaped winding frame holding portion 4 having the same curved shape as the outer circumference of the winding frame front portion 2a is erected substantially vertically. A reinforcing plate 5 is provided between the reel holding portion 4 and the rear portion 2b of the reel to support them to increase strength. A groove 6 for winding an electric wire (auxiliary coil) is provided on the outer circumference of the winding frame 2 over the entire circumference.

FIG. 4 is a sectional view showing the groove of the winding frame portion. In FIG. 4, the dimension a of the opening of the groove 6 is the wire 7 to be wound.
Is set to be approximately the same as or slightly larger than the diameter.
Therefore, the wound electric wires 7 are arranged in a line in the winding order (4 turns in FIG. 4), and a stable magnetic field can be generated. When the electric wire 7 is wound in the groove 6 of the winding frame 2, the winding frame 2 is installed on a flat surface, and the winding is performed in the groove 6 in that state, so that the winding can be performed in two dimensions, and the winding can be wound in a square shape. It does not require a complicated winding device such as a wire, and can be wound easily and has good workability. After winding in the groove 6, by energizing the electric wire 7,
The electric wire 7 is fused and solidified in the groove 6.

2 and 3, the front portion 2 of the bobbin portion
A plurality of (8 in this embodiment) claws 8 facing outward are provided in a vertical direction. After the winding is completed, since the winding frame 1 is molded of resin or the like, the winding frame front portion 2a can be bent by the hinge 3 toward the winding frame holding portion 4 and is provided inside the winding frame holding portion 4. It is possible to fit the claws 8 to the formed convex portions 4a and fix the winding frame front portion 2a and the winding frame holding portion 4.

FIG. 5 is a perspective view showing a winding frame in which the front portion of the winding frame portion and the winding frame holding portion are fixed. A plate member 9 is provided at a portion of the winding frame holding portion 4 that contacts the reinforcing plate 5, and the winding frame front portion 2 is provided.
When a is bent by the hinge 3 and fixed to the reel holding portion 4,
A space surrounded by the front portion 2a of the reel portion, the reel holder 4 and the plate member 9 is formed. By fitting this space into the front flange of the separator of the deflection yoke, the winding frame 1 can be easily attached to the deflection yoke.

In FIG. 1, 11 is a separator having a substantially conical shape, 12 is a core, and 13 is a pair of vertical deflection coils wound in a hook shape, and these constitute a deflection yoke. Here, details of the horizontal deflection coil and other components are omitted. A hook 11c is provided on the rear flange 11b of the separator 11. A part of the winding frame rear portion 2b of the winding frame 1 configured as described above is hooked on the hooking portion 11c, and the front side flange 11a of the separator 11 described in the description of FIG. The portion surrounded by the portion 2a, the winding frame holding portion 4, and the plate member 9 is fitted, and the winding frame 1 on which the auxiliary coil is wound is attached at two positions vertically opposed to the deflection yoke. The position where the winding frame 1 is attached to the deflection yoke is attached along the leaking magnetic field generated from the horizontal deflection coil and can be set arbitrarily.

The electric wire wound around the winding frame 1 is supplied with a current for generating a magnetic field in a direction opposite to the magnetic field generated by the horizontal deflection coil from a power source (not shown), and the respective magnetic fields cancel each other on the front surface of the CRT. As a result, the unnecessary magnetic field is reduced. In this embodiment, a pair of opposing hinges 3
The winding frame portion 2 is bent, but it is needless to say that by providing another pair of winding frame holding portions and hinges, it is possible to bend the front and rear two places to form a saddle shape. is there. With the above configuration, it is possible to provide the deflection yoke device including the auxiliary coil that reduces the unnecessary magnetic field.

[0013]

As described in detail above, in the deflection yoke device of the present invention, in order to form the auxiliary coil on the winding frame,
The shape of the coil is stable, the positioning and attachment of the coil to the deflection yoke are easy, and even if an external force or the like is applied, the coil is less likely to be deformed. In addition, since the auxiliary coil is formed by bending the winding frame with the hinge after forming the two-dimensional winding into the winding frame, a large-scale winding device becomes unnecessary,
It has an extremely excellent practical effect of improving productivity.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a deflection yoke device of the present invention.

FIG. 2 is a perspective view showing a winding frame of an auxiliary coil used in the deflection yoke device of the present invention.

FIG. 3 is a side view showing a winding frame of an auxiliary coil used in the deflection yoke device of the present invention.

FIG. 4 is a cross-sectional view showing a groove of a winding frame portion.

FIG. 5 is a perspective view showing a winding frame in which a front portion of the winding frame portion and a winding frame holding portion are fixed.

FIG. 6 is a diagram showing a first conventional example.

FIG. 7 is a diagram showing a second conventional example.

[Explanation of symbols]

 1 Reel 2 Reel 3 Hinge 4 Retainer 5 Reinforcing Plate 6 Groove 11 Separator 11a Front Side Flange 11b Rear Side Flange 13 Vertical Deflection Coil

Claims (2)

(57) [Claims] 1. A deflection yoke device comprising an auxiliary coil for reducing a magnetic field leaking from a deflection yoke to the outside, wherein the winding frame of the auxiliary coil is a plate-shaped winding frame formed in a substantially elliptical shape. A groove provided in an outer peripheral portion of the winding portion, and a winding frame holding portion that connects two opposing positions of the substantially elliptical winding frame portion, and 2 of the winding frame holding portion of the winding frame portion. It is composed of two hinges provided in the vicinity of the connecting portion of the place, and after winding in the groove, a part of the plate-shaped winding frame portion is bent by the hinge and joined to the winding frame holding portion. A deflection yoke device, characterized in that the auxiliary coil is configured as a guide coil. 2. A deflection yoke device comprising an auxiliary coil for reducing a magnetic field leaking from the deflection yoke to the outside, wherein the winding frame of the auxiliary coil is a plate-shaped winding frame formed in a substantially elliptical shape. A groove provided in an outer peripheral portion of the winding portion, and a winding frame holding portion that connects two opposing positions of the substantially elliptical winding frame portion, and 2 of the winding frame holding portion of the winding frame portion. Two hinges provided in the vicinity of the connecting portion at some locations, and the auxiliary coil is fixed to the deflection yoke by fitting the winding frame holding portion to the front side flange of the separator of the deflection yoke. A deflection yoke device characterized by the above.