JPH0565188U - Degaussing coil - Google Patents

Abstract

(57) [Summary] [Object] To provide a degaussing coil for a cathode ray tube of a color television receiver which has a reduced thickness in the radial direction of the coil and can be mounted in a narrow space, and has improved fitability to a cathode ray tube. [Structure] A plastic plate 4 is added to an insulated electric wire 1 wound in an annular shape, and the electric wire 1 including the plastic plate is covered with an insulating tape 2. As a result, the coil cross section of the plastic plate attachment portion becomes flat, and the thickness dimension H of the portion becomes small, so that the plastic plate attachment portion can also be mounted in a narrow space. Further, since the flat portion is provided, the fitting property with respect to the cathode ray tube is improved, and since the plastic plate serves as a shaping material and a shape-retaining material, shape accuracy, dimensional accuracy, shape-retaining stability, etc. are improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a degaussing coil mounted on a cathode ray tube of a color television receiver.

[0002]

[Prior Art]

 As shown in FIG. 4, the conventional degaussing coil has a structure in which the insulated wire 1 is wound in a ring shape a required number of times, and the bundled wires are covered with an insulating tape 2 around the outer circumference.

[0003]

[Problems to be solved by the device]

 The conventional degaussing coil described above has a circular cross-sectional shape and a large thickness dimension H as shown in FIG. 4 (b). Therefore, the degaussing coil can be installed in a space which is convenient for the configuration of the color television receiver. If you cannot secure enough, you will be subject to usage restrictions. Therefore, it is desirable to make the coil cross section flat when the installation space is narrow, but in the conventional structure, the tightening force of the insulating tape acts uniformly over the entire circumference of the bundled wires, so this requirement cannot be met. ..

[0004] Although this type of coil is easy to assemble if it is previously press-molded into a shape that fits a CRT, the conventional degaussing coil composed of an insulated wire and an insulating tape does not have sufficient shape retention. Therefore, it may be deformed after press molding, and it may be necessary to correct the shape when mounting.

An object of the present invention is to provide a degaussing coil effective in solving these problems.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention employs the following two coil structures.

[0007] One is to add a plastic plate to an insulated electric wire wound in an annular shape, cover the insulated electric wire including the plastic plate with an insulating tape, and make the coil cross section of the plastic plate attachment portion flat. Is.

The other one is an intermediate coil formed by winding an insulated wire in a ring shape and further covering it with an insulating tape and having a peripheral length n (an integer except 1) times the required length L, The coil is further coiled to make the current flow in the same direction. Small coils with a perimeter L are connected in series with a cross point in the middle, and the shape is such that n coils are lined up in the axial direction. .. Hereinafter, the former will be referred to as a first degaussing coil, and the latter will be referred to as a second degaussing coil.

[0009]

[Action]

 In the first degaussing coil, the wound insulated wire spreads laterally along the surface of the plastic plate by the tightening force of the insulating tape, so the cross section of the plastic plate attachment part becomes flat and the thickness dimension of that part is small. And the fit to the cathode ray tube is also improved. Further, since the plastic plate acts as a shaping material and a shape-retaining material, the coil shape accuracy, dimensional accuracy, and shape retention stability are significantly improved.

Also in the second degaussing coil, since n small coils are arranged in a row in the axial direction, the number of windings of the electric wire can be reduced to 1 / n to generate a required magnetic force. In addition, the above-mentioned coil thickness H is reduced to 1 / n of that of the conventional one except for the connecting portion between the small coils. Moreover, since the inner surfaces of the respective small coils are aligned on the same plane, the fitting property for the cathode ray tube is improved.

[0011]

【Example】

 FIG. 1 shows a specific example of the first degaussing coil. In the degaussing coil 7, the insulated wire 1 is wound in a predetermined number of times, and then the plastic plate 4 is added to the inner surface side of the wire bundle in a portion from the point A in the figure to the point B in the clockwise direction. After that, the insulating tape 2 is wrapped around the outer circumference, the whole area is covered with the tape, and the lead wire 3 is pulled out from the wire end. The coil cross section of the part with the plastic plate is flat as shown in FIG. It has become. Therefore, as the thickness H of the relevant portion is reduced, it can be mounted in a narrower space. The plastic plate 4 may be either thermoplastic or thermosetting. Further, in the figure, the plastic plate is attached to the upper half region of the coil, but the addition to the entire region is not limited. In addition, the thickness H of the flat portion can be secured without fail by selecting the thickness and material of the plastic plate 4.

2 and 3 are specific examples of the second degaussing coil. This degaussing coil 8 winds the insulated wire 1 and further covers it with an insulating tape 2 so that the circumference of the target coil circumference L is n times (twice in FIG. 2 and three times in FIG. 3). First, make an intermediate coil. In this case, the number of turns of the wire of the intermediate coil is set to 1 / n of the number of turns required to obtain the required magnetic force. Then, for example, in the case of the coil shown in FIG. 2 in which n = 2, the intermediate coil is folded so that the intermediate points are crossed in the shape of a figure of eight, and two small coils 5 having the circumferential length L are connected at the cross point 6. Coiling in a line in the axial direction. In the case of the coil of FIG. 3 in which n = 3, two 8-shaped cross points 6 at 1/3 of the circumferential length are provided and three small coils 5 having a circumferential length L are arranged in the axial direction. Shape, or three small coils are spirally wound in the same direction in order and the small coils at both ends are coiled (the same applies to coils with n> 3). At this time, in both degaussing coils, be careful so that the current flow direction (winding direction) of each small coil 5 is the same.

In the second degaussing coil 8 configured as described above, since the magnetic forces of the n small coils 3 are added, the same magnetic force as that of the conventional coil can be generated with the number of windings of 1 / n, and the thickness is reduced. H is reduced to 1 / n. In addition, since the substantial cross-sectional shape is flat, it becomes easy to fit the cathode ray tube. Further, if this degaussing coil is fixed by attaching a plastic plate to the inner surface or the outer surface, a better shape retention can be expected.

[0014]

As described above, in the degaussing coil of the present invention, the wound insulated wire is provided with a plastic plate or n small coils each having a winding number of 1 / n are connected in a row. Since it has a coiled shape and a flat section is created and the thickness of the flat section is reduced, it can be installed in a narrow space and the fitting property to a cathode ray tube is improved.

In addition, the one with the plastic plate added can improve the shape accuracy, dimensional accuracy, and shape retention stability of the coil by using the plate, and even when it is attached to the cathode ray tube after press molding, It is possible to prevent collapse and save time and effort for shape correction during installation.

[Brief description of drawings]

1A is a front view of the first embodiment, FIG. 1B is a cross-sectional view taken along line XX of FIG. 1A, and FIG.
Cross section of line

FIG. 2 (a) is a front view of the second embodiment, and FIG. 2 (b) is (a).
Sectional view of line XX in the figure

FIG. 3 (a) is a front view of the third embodiment, and FIG. 3 (b) is (a).
Sectional view of line XX in the figure

4A is a front view of a conventional degaussing coil, and FIG. 4B is a cross-sectional view taken along line XX of FIG. 4A.

[Explanation of symbols]

 1 Insulated Wire 2 Insulation Tape 3 Lead Wire 4 Plastic Plate 5 Small Coil 6 Cross Point 7 First Degaussing Coil 8 Second Degaussing Coil

Claims (2)

[Scope of utility model registration request] 1. A degaussing coil in which a plastic plate is added to an annularly wound insulated wire, the insulated wire including the plastic plate is covered with an insulating tape, and the coil cross section of the plastic plate attachment portion is flat. 2. An insulated wire is wound in an annular shape, and is covered with an insulating tape, and the peripheral length is n (= 1) of a required length L.
N) in the axial direction in the state where small coils with a peripheral length L, in which the current flows in the same direction, have a cross point in the middle and are connected in series, Degaussing coil finished in a lined shape.