JPH05292517A - Degaussing coil - Google Patents

Abstract

PURPOSE:To simply attach the degaussing coil on a television set by forming the degaussing coil by superposing insulating sheets on which a conductive body is printed. CONSTITUTION:By superposing several pieces of insulating sheets 5 on which a conductive foil 3 is printed so that a conductive contact part 2 on the reverse side of the upper insulating sheet 5 and the conductive contact part 2 on the front surface of the lower insulating sheet 5 come into contact with each other, and each sheet conducts, a sheet layer on which the conductive foil 3 is allowed to conduct like a coil is formed. By allowing the conductive contact part 2 of the uppermost part of this sheet layer and a conductive foil contact part 7 to be subjected to conductive contact with each other, a current can be allowed to flow to the conductive foil formed on the coil. Also, by allowing an attenuated variable AC current to flow and by generating a magnetic field, degaussing is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a degaussing coil effective for use in a television receiver or the like.

[0002]

2. Description of the Related Art When a shadow mask of a television receiver is magnetized, the electron beam emitted from the cathode is bent under the influence of the magnetization, which causes color unevenness. At present, in order to demagnetize the magnetization of the shadow mask, a copper wire is wound in a coil shape and the surrounding is insulated with an insulating tape to form a degaussing coil, which is formed according to the shape of the CRT and then a coil clamper or the like is used. It is designed to be attached to the funnel of a television receiver.

[0003]

However, the degaussing coil currently in use requires auxiliary parts such as a coil clamper at the time of mounting, and the work of mounting the coil clamper at a predetermined position in the pre-process of mounting the degaussing coil is necessary. It was essential. Furthermore, the unstable shape of the degaussing coil itself not only makes mounting work extremely difficult, but also causes variations in the mounting position depending on the worker.
Problems also arise in terms of product quality. Further, winding an insulating tape in the manufacturing process of the degaussing coil requires a great deal of labor.

The present invention provides a degaussing coil which solves the above-mentioned conventional problems, can be easily attached to a television receiver, eliminates variations due to work, and has the labor of winding an insulating tape. The purpose is that.

[0005]

The first degaussing coil of the present invention is characterized in that it is constructed by stacking sheets printed with conductors. The second degaussing coil is characterized in that it is formed by sandwiching a copper wire wound in a coil shape between resin-molded plates having grooves.

[0006]

According to the first degaussing coil of the present invention as described above, the degaussing coil can be formed by stacking the insulating sheets on which the conductors are printed. A plate-shaped degaussing coil with printed sheets stacked on top of each other
It can be installed by simply sticking it to the funnel surface of T. Also, the second degaussing coil of the present invention does not need to be wrapped with insulating tape, and can be installed simply by sticking it to the funnel surface of the CRT of the television receiver. The workability is greatly improved. Furthermore, by using Velcro for mounting, mounting and dismounting becomes very easy.

[0007]

EXAMPLES Examples of the first degaussing coil of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is an exploded perspective view of a first degaussing coil according to an embodiment of the present invention, FIG. 2 is a perspective view of the same, and FIG. 3 shows a situation in which the degaussing coil is attached to a CRT.

In FIG. 1, 1 is a conductive foil, which is printed in an arc shape on the front side of the insulating sheet 5, 2 is a conductive foil contact portion, and 3 is a conductive foil so as to form a ring with the conductive foil 1. The circular arc is printed on the back side of the insulating sheet 5, 4 is a conductive foil contact portion and is configured to face the conductive foil contact portion 2, and 6 is a conductor, which is a conductive foil 1 on the front surface and a conductive foil on the back surface. Conductive foil 3 is made conductive, 7 is a conductive contact portion which is conductive to lead wire 8, 9 is a connector portion which is connected to lead wire 8, 10 is a conductive foil contact portion, and lead wire 12 is electrically connected to 11, and is a connector portion, which is connected to the lead wire 11. In addition, all parts except the conductive foil contact part are insulated by the insulating film.
In the above configuration, the conductive sheet 3 with the conductive foil 3 printed thereon is brought into contact with the conductive contact portion 2 on the back surface of the upper insulating sheet 5 and the conductive contact portion 2 on the front surface of the lower insulating sheet 5, and the sheets are electrically connected to each other. By stacking a plurality of sheets in this manner, a sheet layer in which the conductive foil is electrically connected in a coil shape is formed.
Conductive contact part 2 and conductive foil contact part 7 at the top of this sheet layer
And conductive contact between the lowermost conductive contact portion 4 and the conductive foil contact portion 10 of the sheet layer, thereby applying a voltage to the connector 9 and the connector 12 to form a conductive foil formed on the coil. An electric current can be passed.
In addition, demagnetization is performed by passing a variable AC current that attenuates and generating a magnetic field.

FIG. 2 is a perspective view showing a state in which the degaussing coil 5A having the above-mentioned structure is shaped to match the shape of the CRT funnel surface of the television receiver. Connectors 9, 10
A magnetic field is generated and degaussed by passing a variable AC current that attenuates in between.

FIG. 3 shows the state of attachment to the CRT in more detail. In the figure, 5A and 5B are degaussing coils in the above structure, and 13a and 13b are magic tapes which are fixed to the degaussing coils 5A and 5B and the funnel portion 14 at predetermined positions. When installing the degaussing coils 5A and 5B,
Velcro tape 13 fixed to the degaussing coils 5A and 5B
a and the magic tape 13b fixed to the CRT funnel surface 14 are overlapped with each other to form the degaussing coils 5A and 5A.
B can be easily attached to the funnel surface 14. Then, the connector 9 and the connector 12 of the upper and lower degaussing coils 5A and 5B are separately connected to the drive circuit and a variable AC current that attenuates is supplied to generate a damped AC magnetic field, thereby degaussing the shadow mask. Also, connect the connector 12 of the degaussing coil 5A attached to the upper part and the connector 9 of the degaussing coil 5B attached to the lower part, and connect the connector 9 of the upper degaussing coil 5A and the connector 12 of the lower degaussing coil 5B to the drive circuit. A magnetic field is also generated in the upper and lower degaussing coils 5A and 5B by passing a variable AC current that is attenuated by the degaussing. Also, the degaussing coils 5A and 5B thus mounted can be easily removed.

An embodiment of the second degaussing coil of the present invention will be described with reference to FIGS.

FIG. 4 is an exploded perspective view of a degaussing coil according to the second embodiment of the present invention, FIG. 5 is a perspective view of the same, and FIG. 6 shows a situation in which the degaussing coil is attached to a CRT.

In the figure, reference numeral 13 is a plate-like member made of resin or the like, and is provided with a groove 14 and a groove 15. Reference numeral 16 is a copper wire wound in a coil shape, and lead wires 17 are soldered and fixed to both ends and connected to a connector 18. 19
Is also a plate molded of resin or the like, and is provided with grooves 20 and 21.

A copper wire 16 wound in a coil shape is sandwiched between a groove 14 provided in the resin molding plate 13 and a groove 20 provided in the resin molding plate 19 to form the resin molding plate 13 and the resin molding plate 1.
Adhere 9 and. Lead wire 17 and connector 18 are in groove 1
Try to put it out from between 5 and 21.

FIG. 5 shows a perspective view of the second degaussing coil 22 of the present invention thus constructed. FIG. 5 shows the degaussing coil 22 having the above-described structure as a CRT of a television receiver.
The perspective view of the degaussing coil 22 in the said structure formed according to the funnel surface shape is shown. Degaussing is performed by passing a variable AC current that attenuates from the connector 18.

The attachment to the CRT funnel surface 14 is shown in FIG.
Will be explained. In the figure, 22A and 22B are degaussing coils, and the magic tape 23a is a degaussing coil 22A,
And 22B. See also Velcro 23
b is also attached to the funnel surface 14. At the time of attachment, it is possible to attach by attaching the magic tape 23a fixed to the degaussing coils 22A and 22B and the magic tape 23b fixed to the funnel surface.

According to such a construction, it can be mounted without a coil clamper or the like, and can be easily mounted, and it is not necessary to wind an insulating tape. Further, the degaussing coil having such a configuration can serve as a coil by itself, and the functionality is improved by using each of the individual degaussing coils. In addition, the cost can be reduced by combining the same single unit up and down.

[0019]

As described above, according to the degaussing coil of the present invention, it is easy to install and the workability is greatly improved. Further, the degaussing coil of the present invention can function as a coil by itself, and the functionality is improved.
Further, the same products can be produced and combined, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a degaussing coil according to an embodiment of the present invention.

FIG. 2 is a perspective view of a degaussing coil according to an embodiment of the present invention.

FIG. 3 is a side view showing an attached state of the degaussing coil in the embodiment of the present invention.

FIG. 4 is an exploded perspective view of a degaussing coil according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a degaussing coil according to a second embodiment of the present invention.

FIG. 6 is a side view showing an attached state of the degaussing coil in the second embodiment of the present invention.

[Explanation of symbols]

 1 3 Conductive foil 2 4 Conductive foil contact part 5 Insulator 5A, 5B, 22A, 22B Degaussing coil 6 Conductor 7 10 Conductor contact part 8, 11, 17 Lead wire 9, 12 Connector part 13a, 13b, 23a, 23b Velcro tape 14 Funnel part 15 Panel part 16 Neck part 18 Connector

Claims (3)

[Claims] 1. A degaussing coil formed by stacking sheets printed with a conductor. 2. A degaussing coil comprising a coil-shaped copper wire sandwiched between resin-molded plates having grooves. 3. The degaussing coil according to claim 1, further comprising a magic tape for fixing to a CRT.