JPH05290757A - Deflecting yoke - Google Patents

Abstract

PURPOSE:To maintain the deflecting sensitivity excellently, and improve the productive efficiency of a deflecting yoke formed by inserting an integral bobbin, around which a horizontal deflecting coil is coiled, into an integral core, around which a vertical deflecting coil is coiled. CONSTITUTION:Plural coil hooks 21 are projected from the inner wall of a small opening diameter end part of a horizontal coil bobbin 22 toward the inside. Furthermore, the plural coil hooks 21 are formed with a stage difference in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke, and more particularly to a deflection yoke used in a cathode ray tube such as a display monitor or a color television.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional deflection yoke, for example, a deflection yoke disclosed in Japanese Patent Laid-Open No. 63-86218, in which a trumpet-shaped integral bobbin around which a horizontal deflection coil is wound is vertically deflected. FIG. 7 is an exploded view of a deflection yoke formed by inserting it into a ring-shaped integral core around which a coil is wound.

In the figure, a conventional deflection yoke is formed by inserting a horizontal coil bobbin 11 for winding a horizontal deflection coil into a vertical coil bobbin 12 for winding a vertical deflection coil. And the vertical coil bobbin 1
2 has a large diameter end side hook 13 and a small diameter end side hook 14 at both ends thereof, and a ring-shaped integrated magnetic core 15 in the body portion. Also, the horizontal coil bobbin 1
1 has a large diameter end side hook 16 at one end thereof and a vertical groove 17 at the small diameter end side thereof.

FIG. 6 shows the horizontal coil bobbin 11 shown in FIG.
FIG. 11 is a cross-sectional view of the conventional deflection yoke after inserting and assembling into the vertical coil bobbin 12.

In the drawing, the trumpet-shaped horizontal coil bobbin 11 is inserted into a vertical coil bobbin 12 having a ring-shaped integral core to form a deflection yoke. The horizontal coil bobbin 11 has a horizontal deflection coil 18 and a vertical coil bobbin. A vertical deflection coil 19 is wound around 12. The method of assembling such a conventional deflection yoke is as follows.

First, the vertical deflection coil 19 applies a desired magnetic field distribution to the inner surface of the magnetic core 15 while hooking the enamel wire on the large diameter end side hook 13 and the small diameter end side hook 14 of the vertical coil bobbin 12 in order. Wound to form a saddle mold to make. On the other hand, the horizontal deflection coil 18 hooks the enamel wire on the large-diameter end side hook 16 and the small-diameter end side vertical groove 17 of the horizontal coil bobbin 11 in the same manner as the vertical deflection coil 19 while the desired magnetic field is applied to the inner surface. Wound to form a saddle shape that creates a distribution.

When the winding is completed, the horizontal coil bobbin 11 is inserted in one direction from the large-diameter end portion side of the vertical coil bobbin 12 to the small-diameter end portion side, then fixed, and the assembly is completed. As described above, the use of the integral bobbin or the integral core has the advantages that the number of parts is smaller than that in the case of using the divided bobbin or the core, and one-way assembly is possible and the assembling is easy.

[0008]

However, since the conventional deflection yoke is constructed as described above, when the enameled wire is wound, the enameled wire passes through the vertical groove provided in the small diameter end of the horizontal coil bobbin. It was hooked around the horizontal coil bobbin. Therefore, the horizontal deflection coil is bent in the radial direction on the small diameter end side of the horizontal coil bobbin and bulges outward. Therefore, if both horizontal coils are wound and then the integrated horizontal coil bobbin is inserted into the integrated magnetic core to be assembled, the inner diameter of the magnetic core or the vertical deflection coil is larger than that of the horizontal deflection coil expanded in the radial direction. It could not be inserted unless it was larger than the outer diameter.

When the inner diameter of the magnetic core or the vertical deflection coil swells in this way, the swelling inevitably increases the gap between the tapered portion of the horizontal deflection coil and the magnetic core, and the deflection sensitivity must be deteriorated. Absent. This drawback causes a problem that heat generation becomes large, the reliability of the product is deteriorated, and the output loss is increased particularly in a high-precision display monitor and the like, which is a problem in realizing the product function.

Further, in order to avoid this problem, in the conventional deflection yoke, when it is attempted to make the gap between the taper portion of the horizontal deflection coil and the magnetic core small, only the magnetic core is preliminarily wound in advance, and then the magnetic core is horizontally aligned. It is necessary to take a manufacturing method of inserting a coil bobbin and finally winding the assembly, and such a manufacturing method has been conventionally proposed. However, in this method, the assembly order of the deflection yokes is regulated, so that not only the degree of freedom in constructing the assembly line is reduced, but also a defect of the horizontal coil bobbin or the magnetic core is found after the assembly and it is necessary to replace it. In this case, since the horizontal deflection coil is swollen, the bobbin cannot be disassembled until it is disassembled, which takes a lot of trouble.
As described above, the conventional deflection yoke has a problem that it is difficult to perform efficient production.

The present invention has been made in order to solve the above problems, and an object thereof is to obtain a deflection yoke which can efficiently produce at the same time while maintaining good deflection sensitivity by using an integral bobbin and an integral core. There is.

[0012]

In order to achieve the above object, in the deflection yoke according to the first aspect of the present invention, a vertical deflection coil is wound around a trumpet-shaped integral bobbin around which a horizontal deflection coil is wound. In the deflection yoke formed by being inserted into the ring-shaped integral core, the integral bobbin is configured to include a plurality of winding hooks inside from the inner wall of the small diameter end.

A deflection yoke according to a second aspect of the present invention is a deflection yoke formed by inserting a trumpet-shaped integral bobbin around which a horizontal deflection coil is wound into a ring-shaped integral core around which a vertical deflection coil is wound. In the yoke, the integral bobbin is configured by forming a plurality of winding hooks inward from the inner wall of the small-diameter end portion in the axial direction.

[0014]

Therefore, according to the deflection yoke of the present invention, since the integral bobbin is configured to have a plurality of winding hooks inward from the inner wall of the small-diameter end, the horizontal deflection coil has the winding hooks. Even if it extends in the axial direction at the boundary, it does not expand in the radial direction from the outer diameter of the horizontal coil bobbin. Also,
Since the multiple winding hooks are axially stepped from the inner wall of the small-diameter end of the integral bobbin, the crossover part of the horizontal deflection coil is divided into several bundles by the steps of the winding hooks. Since they are arranged separately, the number of enameled wires in one bundle can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an external view showing a horizontal coil bobbin of a deflection yoke according to this embodiment.

In FIG. 1, a horizontal coil bobbin 20 of this embodiment has a winding hook 21 attached from the inner wall of the small diameter end portion toward the inside, and like the conventional deflection yoke, the large diameter end portion side. It has a hook 16.

FIG. 2 is a sectional view after assembly of a deflection yoke formed by inserting the horizontal coil bobbin 20 of this embodiment shown in FIG. 1, and the assembly method is the same as that of the conventional deflection yoke. Be seen.

As shown in the figure, the horizontal deflection coil 18 does not bulge outward from the outer diameter of the horizontal coil bobbin 20.
Since the wire is hooked and wound by the winding hook 21, the gap between the taper portion of the horizontal deflection coil 18 and the magnetic core can be made smaller than that of the conventional deflection yoke.

FIGS. 3 and 4 relate to a second embodiment of the present invention. FIG. 3 shows the winding hook 21 of the first embodiment provided with a step in the axial direction. FIG. 4 is an external view of the horizontal coil bobbin 22 of the deflection yoke, and FIG. 4 is a horizontal coil bobbin 22 around which the horizontal deflection coil 18 is wound.
FIG. As shown in the figure, the crossover portions of the horizontal deflection coil 18 are arranged in several bundles because the winding hooks 21 have steps. This shows that the number of enameled wires forming one bundle can be reduced.

In the deflection yoke of the above embodiment, the case where the vertical deflection coil is a saddle type (saddle type) has been described, but it may be a toroidal type. Further, in the deflection yoke of the above-mentioned embodiment, the winding hook has been described as being L-shaped, but it is not limited to this as long as it is provided inside from the inner wall of the small diameter end.

[0021]

As described above, according to the deflection yoke of the present invention, the horizontal deflection coil wound with the plurality of winding hooks inside from the inner wall of the small diameter end portion of the integral bobbin is wound. Even if it extends in the axial direction around the winding hook, it does not expand in the radial direction beyond the outer diameter of the horizontal coil bobbin. Even if the deflection yoke is formed by inserting it into a ring-shaped integral core wound with a coil, the gap between the taper portion of the horizontal deflection coil and the magnetic core can be reduced, and good deflection sensitivity can be maintained. effective. Therefore, it is possible to suppress heat generation even in a highly accurate display monitor and the like, and it is possible to improve the reliability of the product.

At the same time, since the magnetic core and the horizontal coil bobbin can be assembled without any particular restriction on the winding sequence, there are few restrictions on the construction of the assembly line and it is easy to disassemble and replace defective parts. Good production is possible.

Further, a plurality of winding hooks are provided inward from the inner wall of the small-diameter end portion of the integral bobbin so as to be stepped in the axial direction, and the crossover portion of the horizontal deflection coil is divided into several bundles by the steps. Since it was configured so that it can be placed separately,
The number of enameled wires in one bundle can be reduced, and each enameled wire can be positioned relatively easily. As a result, the magnetic field distribution for each coil is formed with good reproducibility, and there is an effect that a high-quality deflection yoke can be obtained.

[Brief description of drawings]

FIG. 1 is an external view of a horizontal coil bobbin of a deflection yoke according to an embodiment.

FIG. 2 is a sectional view of the deflection yoke of this embodiment shown in FIG. 1 after assembly.

FIG. 3 is an external view of a horizontal coil bobbin of a second deflection yoke of the present embodiment provided with winding hooks that are provided with steps in the axial direction.

4 is an external view showing a state in which a horizontal deflection coil is wound around a horizontal coil bobbin of the second deflection yoke shown in FIG.

FIG. 5 is an exploded view of a conventional deflection yoke.

FIG. 6 is a cross-sectional view of the assembled conventional deflection yoke.

[Explanation of symbols]

 11, 20, 22 Horizontal coil bobbin 12 Vertical coil bobbin 13 Large diameter end side hook 14 Small diameter end side hook 15 Magnetic core 16 Large diameter end side hook 17 Vertical groove 18 Horizontal deflection coil 19 Vertical deflection coil 21 Winding hook

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 16, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

When the inner diameter of the magnetic core or the vertical deflection coil swells in this way, the swelling inevitably increases the gap between the tapered portion of the horizontal deflection coil and the magnetic core, and the deflection sensitivity must be deteriorated. Absent. This drawback is especially
In a high-definition display monitor or the like, heat generation becomes large, which causes a problem that the reliability of the product is deteriorated and the output loss is increased, which is a problem in realizing the product function.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

[0021]

As described above, according to the deflection yoke of the present invention, the horizontal deflection coil wound with the plurality of winding hooks inside from the inner wall of the small diameter end portion of the integral bobbin is wound. Even if it extends in the axial direction around the winding hook, it does not expand in the radial direction beyond the outer diameter of the horizontal coil bobbin. Even if the deflection yoke is formed by inserting it into a ring-shaped integral core wound with a coil, the gap between the taper portion of the horizontal deflection coil and the magnetic core can be reduced, and good deflection sensitivity can be maintained. effective. Therefore, even in a high-definition display monitor or the like, heat generation can be suppressed, and the product reliability can be improved.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Nishino 1 Baba Institute, Nagaokakyo City, Kyoto Prefecture Mitsubishi Electric Corporation Kyoto Factory

Claims (2)

[Claims] 1. A deflection yoke formed by inserting a trumpet-shaped integral bobbin around which a horizontal deflection coil is wound into a ring-shaped integral core around which a vertical deflection coil is wound, wherein the integral bobbin has a small diameter end. A deflection yoke, characterized in that it is provided with a plurality of winding hooks from the inner wall of the part to the inside. 2. A deflection yoke formed by inserting a trumpet-shaped integral bobbin around which a horizontal deflection coil is wound into a ring-shaped integral core around which a vertical deflection coil is wound, wherein a small diameter end of the integral bobbin is provided. A deflection yoke, wherein a plurality of winding hooks are formed by forming a step in the axial direction from the inner wall of the portion to the inside.