JPH06315157A - Misconvergence correction plate - Google Patents

Abstract

PURPOSE:To prevent a short from generating even when a misconvergence correction plate is fallen from the holding part of a deflection yoke, to make it possible to easily mount the misconvergence correction plate on the holding part of the deflection yoke and further to easily perform the adjustment of the misconvergence correction. CONSTITUTION:A misconvergence correction plate 10 is composed of the one formed by inserting a ferromagnetic body piece 12 in a resin 11. As this misconvergence correction plate 10, the one which is engaged to the holding part of the misconvergence correction plate of the bobbin of a deflection yoke, has an engaging part 14 fixing the misconvergence correction plate to the holding part and has a handle part 15 is preferable, and the one where plural projecting and recessing parts which are capable of performing the stepwise adjustments of the engaging location of the misconvergence correction plate in the holding part of the misconvergence correction plate of the deflection yoke are provided on the engaging part 14 is preferable in particular.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke correction plate used in a multi-electron beam cathode ray tube such as an in-line three-beam type color cathode ray tube.

[0002]

2. Description of the Related Art For example, red (R), green (G), blue (B)
In the in-line three-beam type color cathode ray tube in which the electron guns are arranged horizontally or vertically in the cathode ray tube, the deflection yoke used for the neck portion is a saddle type inside the bobbin 1 as shown in FIG. And a vertical deflection coil 2 wound in a toroidal shape on an annular core outside the bobbin 1.

In such a deflection yoke, generally, the deflection amounts of the three beams are different, so that the three beams which should originally match on the screen are displaced in the x direction or the y direction, resulting in color misregistration. Problem arises. There are various modes of this misconvergence, such as x-axis top raster (TLH), y-axis top raster (TLV), y-axis cross cross (YCH), and x-axis center raster (HCR). is there.

Therefore, in order to correct such misconvergence, conventionally, as shown in FIG. 7, a non-directional electromagnetic steel such as a silicon steel plate is provided on the electron gun side of the vertical deflection coil 2 of the deflection yoke. The misconvergence correction plate 3 made of a body (ferromagnetic material) is attached to adjust the magnetic fields in the horizontal and vertical directions. In this case, since the type of misconvergence and the amount of correction differ depending on the variation of the product, the misconvergence correction plate is, for example, as shown in FIG. The same figure b) is prepared, and various kinds of products having the same shape but different sizes are prepared, and these are selected according to the misconvergence of each product.

As a method of mounting such a misconvergence correction plate, a misconvergence correction plate is usually attached to a holding portion 4 formed so that the misconvergence correction plate can be inserted into a predetermined position of the bobbin 1 of the deflection yoke. It is inserted and fixed with an adhesive. In this case, the insertion amount of the misconvergence correction plate is also selected according to the misconvergence of each product.

[0006]

However, since the conventional misconvergence correction plate 3 is made of a ferromagnetic material such as a silicon steel plate, such a misconvergence correction plate 3 is sufficiently fixed by the holding portion 4. However, there is a problem in that it falls off on a substrate such as a TV set, causes a short circuit, and causes smoke and fire.

In order to prevent such a short circuit, it may be considered to increase the adhesive strength of the misconvergence correction plate 3 in the holding portion 4, but it is difficult to completely prevent the misconvergence correction plate 3 from coming off. Is.

The present invention is intended to solve such a problem of the prior art, and an object thereof is to eliminate the occurrence of a short even if the misconvergence correction plate falls off from the holding portion of the deflection yoke. And

Another object of the present invention is to make it easier to fix the misconvergence correction plate to the holding portion and adjust the misconvergence correction amount by changing the fixing position of the misconvergence correction plate.

[0010]

As a misconvergence correction plate, the inventor of the present invention insert-molds a ferromagnetic material such as a silicon steel sheet with an insulating resin so that the ferromagnetic material is not substantially exposed. That the above-mentioned object can be achieved by using, especially, the engaging portion is provided on the misconvergence correction plate thus insert-molded, and the engaging portion is gradually provided on the holding portion provided on the bobbin of the deflection yoke. It has been found that the engagement makes it possible to easily fix the misconvergence correction plate and adjust the misconvergence correction amount, thereby completing the present invention.

That is, the present invention provides a misconvergence correction plate characterized in that a ferromagnetic material piece is insert-molded in a resin.

In particular, such a misconvergence correction plate has an engaging portion for engaging and fixing the misconvergence correction plate with the misconvergence correction plate holding portion of the bobbin of the deflection yoke, and more preferably,
There is provided such an engaging portion having a plurality of concaves and convexes that enable stepwise adjustment of the engaging position of the misconvergence correction plate in the misconvergence correction plate holding portion.

Further, as the deflection yoke bobbin for holding the misconvergence correction plate having the above-mentioned engaging portion on the deflection yoke, the misconvergence correction plate holding portion which is a mounting portion of the misconvergence correction plate is as described above. A bobbin for a deflection yoke, characterized in that it comprises an engaging means for engaging with an engaging portion of the misconvergence correction plate and fixing the misconvergence correction plate.

[0014]

Since the misconvergence correction plate of the present invention is formed by insert-molding a ferromagnetic piece in resin,
Substantially, there is no exposed portion of the ferromagnetic material on the surface. Therefore, even if the misconvergence correction plate falls off from the holding portion of the deflection yoke, the occurrence of short circuit can be eliminated.

Further, in the misconvergence correction plate of the present invention, the misconvergence correction plate having the engaging part for engaging and fixing the misconvergence correction plate with the misconvergence correction plate holding part of the bobbin of the deflection yoke is provided with the misconvergence correction plate. When fixing to the misconvergence correction plate holding part, it becomes unnecessary to use an adhesive. Therefore, the work of mounting the misconvergence correction plate on the deflection yoke can be simplified.

Further, in the misconvergence correction plate of the present invention having the engaging part as described above, the engaging part is provided with a stepwise adjustment of the engaging position of the misconvergence correcting plate in the misconvergence correcting plate holding part. What has a plurality of possible unevenness, depending on the number of the unevenness,
It is possible to adjust the amount of misconvergence correction stepwise. Therefore, the types of misconvergence that occur in the deflection yoke (TLH, YLV, YCH, HCR
It is possible to reduce the number of types of misconvergence correction plates prepared in advance according to the amount) and the adjustment operation of the correction is simplified.

[0017]

EXAMPLES The present invention will be described in detail below based on examples. In each of the drawings for explaining the embodiments, including the above-mentioned conventional example, the same reference numerals represent the same or equivalent constituent elements.

FIG. 1 is a plan view (FIG. 1A) and a sectional view (FIG. 1B) of an embodiment of the misconvergence correction plate 10 of the present invention. Misconvergence correction plate 1 of this embodiment
No. 0 is obtained by insert-molding the ferromagnetic piece 12 into the resin 11. Here, as the ferromagnetic piece 12, a short piece is used, and the misconvergence correction plate 1 is used.
It is embedded in almost all 0s.

In the present invention, the ferromagnetic material piece to be insert-molded is not particularly limited, and the same material as the conventional misconvergence correction plate can be used, and various shapes can be used. it can. Further, the mode in which the ferromagnetic piece is embedded in the resin can be various modes.

For example, in the embodiment shown in FIG.
In the example shown in FIG. 2, the ferromagnetic material piece 12 is biased to a part of the misconvergence correction plate 10a as in the misconvergence correction plate 10a shown in FIG. It may be embedded. In this way, by changing the shape and size of the ferromagnetic piece 12 itself, or the embedding position, it is possible to form a misconvergence correction plate having the same appearance with various correction amounts.

On the other hand, in the present invention, an insulating resin such as polybutylene terephthalate or polycarbonate can be used as the resin for embedding the ferromagnetic piece.

Further, the outer shape of this resin can be variously selected according to the shape of the ferromagnetic piece to be embedded, the convenience of mounting on the deflection yoke, and the like. For example, in the embodiment shown in FIGS. 1 and 2, a hook 13 having a spring property is formed on both sides of the ferromagnetic piece 12, and the hook 13 is further formed.
The engaging portion 14 is formed at the end of the. This engaging portion 14
Is engaged by inserting the misconvergence correction plates 10 and 10a into a misconvergence correction plate holding portion provided on a deflection yoke bobbin of the present invention described later,
The misconvergence correction plates 10 and 10a can be fixed to their holding portions.

In the present invention, such a hook 13 is used.
Alternatively, the position where the engaging portion 14 is provided can be appropriately determined according to the shape and size of the ferromagnetic piece to be embedded, the position on the bobbin where the misconvergence correction plate is mounted, and the like. For example, as shown in FIGS. 1 and 2, the engaging portion 1
4 may be provided on both sides of the ferromagnetic piece 12, or the correction plate 3a (a in the figure) or 3b (b) in the conventional ferromagnetic material shown in FIG. 6 may be inserted. As the molded product, as in the misconvergence correction plates 10b (a in the figure) and 10c (b in the figure) respectively shown in FIG. 3, one of the correction plates 3a or 3b is provided with a hook 13 having an engaging portion 14. It may be formed on the side of.

As for the shape of the engaging portion 14 formed on the hook 13, as shown in FIGS.
The whole may form one convex portion with respect to the hook 13, and when the misconvergence correction plate is engaged with and fixed to the misconvergence correction plate holding portion, its engaging position may be uniquely determined. As in the misconvergence correction plate 10d shown in FIG. 4, the engagement portion 14 is formed of a plurality of uneven portions, and the engagement position of the misconvergence correction plate holding portion of the misconvergence correction plate 10d can be adjusted stepwise. You may do it. It is preferable to form the engaging portion in this way, because the misconvergence correction amount can be adjusted in stages even by using one misconvergence correction plate.

Further, according to the present invention, like the misconvergence correction plate 10 shown in FIG. 1, a handle portion 15 having an uneven surface can be provided. As a result, when the misconvergence correction plate 10 is inserted into the misconvergence correction plate holding portion of the bobbin of the deflection yoke, the misconvergence correction plate 10 can be easily picked up. It is possible to improve the workability of.

In manufacturing the misconvergence correcting plate of the present invention, insert molding can be carried out by a conventional method, and the method of aligning the ferromagnetic piece and the mold at that time is not particularly limited.

For example, the misconvergence correction plate 10 shown in FIG. 1 has a hole 16 penetrating the resin 11 and the ferromagnetic piece 12 and a hole 17 partially exposing the ferromagnetic piece 12. This is provided in the hole portion 16 when the misconvergence correction plate 10 is insert-molded.
It is shown that the ferromagnetic piece 12 and the metal mold are aligned by inserting the positioning pin into, and the ferromagnetic piece 12 is supported by the support rod passing through the hole 17 and molded. It should be noted that the hole 16 or the hole 17 as described above results in that part of the ferromagnetic piece 12 is exposed on the surface of the misconvergence correction plate. Is a little exposed even if is partially exposed,
Further, since it is a concave portion, it can be considered that the ferromagnetic piece 12 is not substantially exposed. Of course, even when aligning by such a method, the hole 1
6, the ferromagnetic piece 1 by closing the hole 17 with resin
2 may be completely covered with the resin 11.

Unlike the misconvergence correction plate 10 shown in FIG. 1, the misconvergence correction plate 10d shown in FIG. 4 is not provided with any hole for exposing the ferromagnetic piece 12. This is because the positioning pins were arranged around the ferromagnetic piece 12 as shown by the arrow A in FIG. 4 during insert molding to align the ferromagnetic piece 12 and the mold. . In this way, by positioning the positioning pin around the ferromagnetic piece 12 and performing alignment, a hole is formed in advance in the ferromagnetic piece 12 when insert-molding the ferromagnetic piece 12. Is unnecessary, and a misconvergence correction plate in which the ferromagnetic piece 12 is completely covered with the resin 11 after insert molding can be easily obtained, which is preferable.

On the other hand, the misconvergence correction plates 10 and 10a having the hooks 13 and the engaging portions 14 as described above.
The deflection yoke bobbin of the present invention in which 10d is mounted engages with the engaging portion 14 and the misconvergence correcting plates 10 and 1 are attached.
It has engaging means for fixing 0a to 10d. As an engaging means of such a bobbin for the deflection yoke, for example, FIG.
As shown in FIG. 5, when the misconvergence correction plate 10 is inserted, the misconvergence correction plate holding unit 21 of the bobbin 20 is adapted to the misconvergence correction plate 10 shown in FIG.
It is possible to use one having a frame portion 21a that supports the misconvergence correction plate 10 under the pressure of the hook 13 of 0 and an engaging portion 21b that engages with the engaging portion 14 of the misconvergence correction plate 10. . In addition, this bobbin 20
Other configurations of the above can be similar to those of the conventional bobbin for the deflection yoke in which the horizontal deflection coil and the vertical deflection coil are mounted.

Thus, the misconvergence correction plate 1
When the engagement portion 14 of 0 and the engagement portion 21b of the misconvergence correction plate holding portion 21 of the bobbin 20 are engaged with each other so that the misconvergence correction plate 10 can be fixed to the holding portion 21, bonding is performed as in the conventional case. It becomes unnecessary to use an agent, and the work of mounting the misconvergence correction plate 10 can be simplified.

[0031]

According to the present invention, it is possible to eliminate the occurrence of a short circuit caused when the misconvergence correction plate falls off the holding portion of the deflection yoke.

Particularly, in the misconvergence correction plate of the present invention, if the misconvergence correction plate is provided with an engaging portion that can be fixed to the holding portion of the deflection yoke, the misconvergence correction plate can be simply attached to the deflection yoke. It becomes possible to mount it, and if multiple concavities and convexities are provided in this engaging part so that the fixed position of the misconvergence correction plate can be adjusted stepwise, the misconvergence correction amount can be stepped by using one misconvergence correction plate. Will be able to adjust. Therefore, it becomes possible to perform the misconvergence correction more easily.

[Brief description of drawings]

FIG. 1 is a plan view and a cross-sectional view of a misconvergence correction plate according to an embodiment.

FIG. 2 is a plan view of a misconvergence correction plate according to another embodiment of the present invention.

FIG. 3 is a plan view and a cross-sectional view of a misconvergence correction plate according to another embodiment of the present invention.

FIG. 4 is a plan view of a misconvergence correction plate according to another embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view of a misconvergence correction plate holding portion of the bobbin of the deflection yoke.

FIG. 6 is a plan view of various conventional misconvergence correction plates.

FIG. 7 is an explanatory diagram of a general deflection yoke.

[Explanation of symbols]

1 bobbin 2 horizontal deflection coil 3, 3a, 3b conventional misconvergence correction plate 4 misconvergence correction plate holder 10, 10a to 10d misconvergence correction plate 11 resin 12 ferromagnetic piece 13 misconvergence correction plate hook 14 Misconvergence compensating plate engaging part 15 Misconvergence compensating plate handle part 16 Hole part 17 Hole part 20 Bobbin 21 Bobbin misconvergence compensating plate holding part 21a Bobbin misconvergence compensating plate holding part 21b Bobbin mistake Engagement part of the convergence correction plate holding part

Claims (6)

[Claims] 1. A misconvergence correction plate, characterized in that a ferromagnetic piece is insert-molded in a resin. 2. The misconvergence correction plate according to claim 1, wherein the ferromagnetic piece is not exposed on the surface. 3. The misconvergence correction plate according to claim 1 or 2, wherein the misconvergence correction plate has an engaging portion that engages and fixes the misconvergence correction plate with the misconvergence correction plate holding portion of the bobbin of the deflection yoke. Board. 4. The misconvergence correction plate according to claim 3, wherein the engagement part has a plurality of concavities and convexities that allow stepwise adjustment of an engagement position of the misconvergence correction plate in the misconvergence correction plate holding part. 5. The misconvergence correction plate according to claim 1, further comprising a handle portion. 6. A bobbin for a deflection yoke of a cathode ray tube having a horizontal deflection coil, a vertical deflection coil and a misconvergence correction plate mounted thereon, wherein the misconvergence correction plate holding part serving as a mounting part of the misconvergence correction plate is provided.
6. A bobbin for a deflection yoke, comprising: engaging means that engages with an engaging portion of the misconvergence correction plate according to any one of to 5 to fix the misconvergence correction plate.