JPS63117585A - Degaussing coil for color cathode ray tube and its manufacture - Google Patents

Abstract

PURPOSE:To improve the workability of manufacturing by insulating a ring coil core member by an electric insulation tape whose axial line is direction to the ring shaped axial line of the core member or the like. CONSTITUTION:The ring coil core member 10 on which a coil core wire 11 is wound as a ring is insulated by an electric tape 20 such as a soft polyvinylchloride whose axial line is directed to the ring axial line of the core member 10 and the core 10 is insulated by the tape 20 easily and surely by overlapping both transverse direction side ridges 21 vertically and applying ultrasonic wave welding to them and leads 13, 14 are led out externally from the tape 20. By such a constitution, the manufacturing workability of the degaussing coil for a cathode ray tube is improved.

Description

[Detailed Description of the Invention] This invention relates to a degaussing coil for a color cathode ray tube, which is attached to the funnel part of a color cathode ray tube to prevent convergence deviation caused by the influence of magnetism, and a method for manufacturing the same. .

Conventional ① and 5. Conventionally, as degaussing coils for color cathode ray tubes of this kind, there are conventional degaussing coils as shown in Fig. 17 (a) 9, Fig. 17 (b), Fig. 18 (a),
The one shown in FIG. 18(b) is known. In the former, that is, the conventional degaussing coil shown in FIGS. 17(a) and 17(b), a coil core material 60 is formed by winding a coil core wire 61 made of enamel coated wire in a circular shape with a required number of turns. The surface of this coil core material 60 is spirally wound and coated with an electrically insulating adhesive tape 701, and the lead portions 62 and 63 at both ends of the coil core material 60 are led out to the outside.

On the other hand, in the latter degaussing coil of the prior art shown in FIGS. 18(a) and 18(b), the coil core material 60 is covered with a soft synthetic resin tube 80, and the lead portions 62, 63 at both ends are covered with a soft synthetic resin tube 80. It has a configuration in which it is led out to the outside.

■ is about 7゛. Of these conventional degaussing coils, the former requires a very troublesome work to wrap the electrically insulating adhesive tape 70 in a spiral shape. Generally, the electrical insulating tape 70 is wound and coated manually, which tends to cause fluctuations in the spiral pinch, resulting in uneven winding, which deteriorates the appearance. Moreover, since the workability is not good, the winding cycle time becomes long, leading to high costs.

On the other hand, the latter technique requires the work of continuously inserting the coil core material 61 into the soft synthetic resin tube 80 that has been deformed into an approximately annular shape, depending on the number of turns (150 to 160), and is therefore more preferable than the former technique. However, there are problems in that the workability is poor and the cost is also high.

The present invention was made to solve the problems of the prior art, and provides a degaussing coil for color cathode ray tubes and a method for manufacturing the same, which can improve workability and reduce costs as a result. It is intended to.

.・The degaussing coil for a color cathode ray tube according to the present invention for use in reading has a coil core material formed by winding a coil core wire in an annular shape with a required number of turns, and the axis of the electrical insulating tape is aligned with the annular axis of the coil core material. The coil core material is covered and held by the electrically insulating tape, and the lead portions at both ends of the coil core material are led out from the electrically insulating tape.

Further, the method for manufacturing a degaussing coil for a color cathode ray tube according to the present invention includes the steps of: winding an electrical insulating tape at least once along the outer circumference of a spool that is assembled so as to be disassembled in the axial direction; and then driving the spool to rotate. Then, while traversing the coil core wire, wrap it around the outer periphery of the electrical insulating tape a required number of times to form an annular coil core material, and with the lead portions at both ends of the coil core material led out, wrap the coil core material with the insulating tape. The coil core material covered with electrical insulating tape is taken out from the spool by disassembling the spool while maintaining the covering.

1. According to the degaussing coil for a color cathode ray tube according to the present invention, the electrical insulation tape is formed by aligning the axis of the electrical insulating tape with the annular axis of the coil core material formed by winding the coil core wire annularly with the required number of turns. The coil core material can be covered and held by the tape.

Further, according to the method of manufacturing a degaussing coil for a color cathode ray tube according to the present invention, an electrical insulating tape is wound along the outer periphery of a spool that is assembled so as to be disassembled in the axial direction, and a required number of turns of the coil core wire are wound around the outer periphery of the spool. After turning to form an annular coil core wire, the coil core wire can be covered and held with the electrical insulating tape.

1 presentation Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of a degaussing coil for a color cathode ray tube according to the present invention. In these figures, 10 is a coil core material, 20 is an electrical insulating tape, and the coil core material 10 is, for example, A coil core wire 11 made of an enamelled copper wire with a diameter of 0.32 mm is wound with a number of turns of 150 to 160, and the inner diameter is such that it can be externally fitted into the funnel part of a color cathode ray tube (not shown), or it is crossed in a figure 8 shape as described later. After that, when the annular portions adjacent on both sides are overlapped, the annular portion is wound into an annular shape having an inner diameter that can be externally fitted into the funnel portion.

The electrical insulating tape 20 is made of, for example, soft vinyl chloride, and its axis, that is, the center line in the width direction extending in the longitudinal direction, is aligned with the annular axis of the coil core material 10.
Covering the coil core material 10, both edges 21.2 in the width direction thereof
The coil core material 10 is held by stacking the coil core material 1 vertically and joining them by ultrasonic welding.

The electrical insulating tape 20 is formed into an annular shape by overlapping both longitudinal ends 22.22 as shown in FIG. Both side edges 21 and 21 of the ultrasonically welded electrical insulation tape 20 are led out through the welding gap.

FIG. 5 shows another embodiment of the covering holding structure according to the present invention, in which both end edges 21.2 in the width direction of the electrical insulating tape 20 are shown.
After the coated surfaces (inner surfaces) of the two are brought into contact with each other, this contact portion is joined by high frequency welding. In this case too,
The lead portions 13 and 14 at both ends of the coil core member 10 are led out through the welding gap as in the previous embodiment.

FIG. 6 shows still another embodiment of the covering holding structure according to the present invention, in which both end edges 2 in the width direction of the electrical insulating tape 20 are shown.
1. Attach an adhesive cloth (commonly known as Velcro tape) 23 to the inner surface of one end edge 21 in 1.21, and adhere an adhesive cloth 24 to the outer surface of the other end edge 21 in the same way.
．． Glue 24. In this case as well, the lead portions 13 and 14 at both ends of the coil core material 10 are as in the first and second embodiments.
It is led out through the adhesive gap.

In the above configuration, the degaussing coil A is used by being fitted onto the funnel portion 32 on the rear side of the face panel 31 of the color cathode ray tube 30, as shown in FIG.

FIGS. 10 and 11 are explanatory diagrams showing an embodiment of the manufacturing method according to the present invention, and in these figures, the spool 40 can be disassembled into two parts by, for example, tightening a screw 41 at the small diameter part. It is configured.

12 and 13 along the outer circumference of this spool 40.
As shown in the figure, electrical insulating tape 20 is wrapped once to hold both longitudinal ends 22, 22 together.

Next, the spool 40 is rotationally driven by a rotation drive mechanism (not shown), and the coil core wire 11 is wound a required number of turns (for example, 150 to 160 turns) by traverse mounting (not shown), as shown in FIGS. 14 and 15. An annular coil core material 10 is formed, and lead portions 13 and 14 at both ends are led out.

Next, as shown in FIG.
The both side edge portions 21.21 of the two side edges 21.21 are overlapped, the overlapped side edge portions 21.21 are joined by ultrasonic welding, and the coil spool 40 is further disassembled to remove the degaussing coil A, similar to the above. used for.

In addition, both side edge parts 21.21 of the electrical insulation tape 20 are as follows.
They may be joined by the cover holding structure shown in FIGS. 5 and 6.

As explained above, according to the degaussing coil for color cathode ray tubes and the manufacturing method thereof according to the present invention, the coil core wire is wound the required number of turns around the electrical insulating tape wound around the outer periphery of the spool. Since the coil core material is covered and held with electrical insulating tape in a state where the lead portion is formed and the lead portion is led out, a degaussing coil can be easily obtained by automation.

Therefore, compared to conventional degaussing coils, manufacturing efficiency is greatly improved and costs can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an embodiment of a degaussing coil according to the present invention, FIG. 2 is an enlarged sectional view taken along line nm in FIG. 1, and FIG. 4 is an enlarged sectional view taken along line IV-IV, FIG. 5 is an enlarged sectional view showing another embodiment of the covering holding structure, and FIG. 6 is another embodiment. FIG. 7 is a schematic side view showing an example of a usage state, FIG. 8(a) and FIG.
Figure (b) is an explanatory front view showing a preparation form adapted to another usage example, Figure 9 is a schematic side view showing another usage example, and Figure 10 is a schematic side view showing another usage example.
The figure is a schematic cross-sectional front view showing an example of the apparatus necessary to carry out the method of the present invention, and FIG. 11 is an x--
A sectional view taken along the X-ray, FIG. 12 is a sectional front view showing the electrical insulating tape wound around the spool, and FIG.
14 is a sectional front view showing the state of formation of the coil core material, and FIG. 15 is a sectional view taken along the line Xn-Xff in the figure.
4, FIG. 16 is a sectional view showing the front of the cover retainer, FIG. 17(a) is a partially cutaway front view of an example of a conventional degaussing coil, and FIG. Figure (b) is a sectional view taken along the line xvb-xvb in Figure 17 (a), Figure 18 (a) is a partially cutaway front view of another example of the conventional degaussing coil, b) is a sectional view taken along the line xvrb-'XVIb in FIG. 18(a). 10... Coil core material, 11... Coil core wire, 13.
14... Lead portion, 20... Electrical insulation tape, 21
...Both end edges, 40...Spool.

Claims (2)

[Claims] (1) A coil core material is formed by winding a coil core wire in a ring shape with a required number of turns, and the coil core material is coated with the electrical insulation tape by aligning the axis of the electrical insulation tape with the annular axis of the coil core material. A degaussing coil for a color cathode ray tube, characterized in that the lead portions at both ends of the coil core material are led out from an electrically insulating tape. (2) After winding an electrically insulating tape at least once along the outer periphery of a spool that is assembled in a manner that can be disassembled in the axial direction, the spool is rotated and the coil core wire is traversed while the electrically insulating tape is wound around the outer periphery of the electrically insulating tape. A required number of turns are wound to form an annular coil core material, the coil core material is covered and held with the insulating tape with the leads at both ends of the coil core material led out, and the spool is disassembled to form the electrically insulating tape. A method for manufacturing a degaussing coil for color cathode ray tubes, which comprises removing a coil core material held by a spool from a spool.