JPH052989A - Manufacture of deflection yoke for tv receiver - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the cost by simplifying the manufacturing process of the hull / toroidal deflection yoke. A horizontal deflection coil 5 having a bent portion only at one end is assembled inside a bobbin 1 without a neck portion,
The vertical deflection coil 2 is preliminarily wound around the two-divided cores 3a and 3b in a separate process, and the two divided cores 3a and 3b are integrally joined to each other to be manufactured as a ring-shaped core 3. 3 was fitted from the small diameter side of the bobbin 1 and assembled to the bobbin 1, and then the neck portion 7 was attached to the bobbin 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a deflection yoke for a television receiver of a trough / toroidal type.

[0002]

2. Description of the Related Art In a cathode ray tube of a television receiver, a deflection yoke for deflecting an electron beam accelerated and focused by an electron gun built in a rear neck vertically and horizontally is provided at a boundary portion between the neck and the funnel. Is installed from the outside.

In the deflection yoke, a vertical deflection coil is wound on the outside of a resin bobbin spread like a trumpet, and a horizontal deflection coil is wound on the inside so that their magnetic fields are orthogonal to each other.
A core is attached to the outside of the vertical deflection coil so as to wrap the coil. The winding shape of the horizontal deflection coil is a saddle shape, but the winding shape of the vertical deflection coil can be a saddle shape or a toroidal shape. Depending on the combination of the two, two types of a saddle shape / saddle shape and a saddle shape / toroidal shape are available. The deflection yoke is completed and is used according to the application.

FIG. 4 shows an example of a conventional saddle-shaped / hook-shaped deflection yoke. Reference numeral 1 is a resin bobbin formed in a trumpet shape, and 2 is a hook-shaped vertical deflection coil wound on the outside of the bobbin 1. Reference numeral 2a denotes a vent portion of the vertical deflection coil 2 projecting outward on the small diameter side of the bobbin 1, and 2b denotes a vent portion of the vertical deflection coil 2 projecting outward on the large diameter side of the bobbin 1. Reference numeral 3 is a two-divided ring-shaped core mounted so as to enclose the vertical deflection coil 2. On the inner surface of the ring-shaped core 3, spacers 4 such as rubber, sponge, and tape are provided.
By sticking together, the gap between the core 3 and the vertical deflection coil 2 when it is assembled to the vertical deflection coil 2 is filled, and the displacement movement of the core 3 is eliminated.

On the other hand, the saddle type / toroidal type deflection yoke is not shown, but instead of the saddle type vertical deflection coil 2 shown in FIG. A bobbin 1 wound around the bobbin 1 is attached around the bobbin 1.

In order to assemble a saddle-shaped / toroidal-shaped deflection yoke, first, a saddle-shaped horizontal deflection coil is attached to the inside of each of the two divided bobbins 1 so that the vent portion thereof enters the neck portion of the bobbin. After that, both bobbins are joined together, and a vertical deflection coil is wound in a toroidal shape on each of the cores that have been divided into two parts in advance. After that, the assembly is performed by rotating the assembly for further alignment, but the assembly of the two-divided core around which the vertical deflection coil is wound in the production line of the deflection yoke is extremely laborious and time-consuming, and the manufacturing cost is high. It was a factor in the ups.

[0007]

The inventor of the present invention has found that, in the hull-shaped / toroidal-shaped deflection yoke, there is no bent portion on the small diameter side of the bent portions of the horizontal deflection coil assembled inside the bobbin. The present invention aims to simplify the manufacturing process of the deflection yoke having such a structure, paying attention to the fact that there is an extremely small one.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a two-divided bobbin having two neck-shaped two-divided bobbins fitted with a horizontal horizontal deflection coil having no vent portion inside each two-divided bobbin. A ring-shaped core formed by integrally joining and vertically winding a vertical deflection coil in a toroidal shape on each of the two divided cores and then coupling the two divided cores together from the small diameter side of the bobbin The neck portion is fitted around the bobbin, and then the neck portion is attached to the end portion on the small diameter side of the bobbin.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 shows a horizontal deflection coil used in a deflection yoke manufactured according to the present invention, and FIG. 2 also shows a bobbin. As can be seen from FIG. 1, the horizontal deflection coil 5 has a vent portion 5b on the large diameter side, but has no vent portion on the small diameter side. Further, the bobbin 1 also has a flange portion 1a on the large diameter side, but does not have a neck portion on the small diameter side.

FIG. 3 shows the manufacturing method according to the present invention in the order of steps.

First, as shown in FIG. 3A, a horizontal deflection coil 5 having a bent portion 5b only at one end is assembled inside each of the two divided bobbins 1b and 1c.

Next, as shown in FIG. 3B, the two-divided bobbin 1 having the horizontal deflection coil assembled therein is joined and integrated with an adhesive or the like.

On the other hand, in a separate process, each of the two-divided cores 3a, 3
The vertical deflection coil 2 is wound around b in a toroidal shape, and both cores 3 are joined by metal fittings 6 to be assembled into a ring shape.

Next, as shown in FIG. 3C, the ring-shaped core 3 is fitted from the small diameter side of the integrated bobbin 1 and assembled around the bobbin 1.

After that, as shown in FIG. 3D, the neck portion 7 prepared in a separate step as in the ring-shaped core 3 is attached to the bobbin 1.
It is fitted from the small diameter side of and is fixed to the rear end of the bobbin 1 by snapping or the like. Thus, the deflection yoke as shown in FIG. 3E is completed.

As can be seen from the above manufacturing process, since the toroidal vertical deflection coil is manufactured in advance in a process different from the manufacturing process of the deflection yoke, the deflection yoke manufacturing process simply involves fitting the bobbin. The process (shown in FIG. 3D) is sufficient.

In the above embodiment, the horizontal deflection coil assembled inside the bobbin has been described as having no bent portion on one side, but a coil having a slight bent portion can be manufactured by the manufacturing method of the present invention.

[0019]

As described above, according to the present invention, the manufacture of the paddle / toroidal deflection yoke is
Since the vertical deflection coil is wound in a toroidal manner on each of the two divided cores in advance, these divided cores are integrally joined to form a ring-shaped core, and the bobbin can be fitted into the bobbin from the small diameter side. The assembly process is simple and the process is simplified accordingly, contributing to cost reduction.

[Brief description of drawings]

FIG. 1 is a perspective view of a horizontal deflection coil used in a deflection yoke manufactured according to the present invention.

FIG. 2 is a perspective view of a bobbin of a deflection coil manufactured according to the present invention.

3A to 3E show a manufacturing method according to the present invention in the order of steps.

FIG. 4 is a perspective view of an example of a conventional saddle-shaped / hook-shaped deflection yoke.

[Explanation of symbols]

 1 bobbin 2 vertical deflection coil 3 ring-shaped core 5 horizontal deflection coil 7 neck part

Claims (1)

Claim: What is claimed is: 1. A hull-shaped horizontal deflection coil having no vent portion is assembled on the inside of each of the two-divided bobbins having no neck portion, and thereafter, the two-divided bobbins are integrally joined together, while the two-divided bobbin is divided into two portions. A vertical deflection coil is wound in a toroidal shape on each of the formed cores in a separate process, and then the two divided cores are joined to form a ring-shaped core, and the ring-shaped core is arranged from the small diameter side of the bobbin to the periphery of the bobbin. And a neck portion is attached to an end of the bobbin on the small diameter side, and a method for manufacturing a deflection yoke for a television receiver, comprising: