JPH09115461A - Delection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflection yoke on which installing workability and position adjusting workability of plural correcting pieces can be improved. SOLUTION: Installing ribs 40 and 41 having a structure that L-shaped ribs are superposed on each other in two stages is provided, and a first correcting piece 30 is inserted into L-shaped ribs 44 and 45 of a first stage, and a second correcting piece 37 is inserted into L-shaped ribs 42 and 43 of a second stage. Therefore, the second correcting piece 37 can be temporarily fixed without using an adhesive. Since an installing position is regulated by the L-shaped ribs 42 and 43, reproducibility of adjusting work is enhanced. Therefore, the respective correcting pieces can be easily installed in an optimal position corresponding to miss convergence of a correcting object.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deflection yoke for an in-line type color picture tube, and more specifically, a mounting structure for mounting a correction piece for adjusting a magnetic field (for example, correction of misconvergence). Related to the improvement of.

[0002]

2. Description of the Related Art As a deflection yoke mounted on a neck portion of an in-line type color picture tube, there is, for example, one shown in FIG. In the figure, the small-diameter rear end of each of the pair of tapered separators 10 and 12 having the large-diameter side and the small-diameter side is located on the small-diameter side rear end side, that is, on the electron gun side of the color picture tube (not shown). Enlarged surfaces 10a and 12a (small-diameter flange portions) are provided. A vertical deflection coil 18 is provided on the tapered portions of the separators 10 and 12, and a core 16 is provided on the vertical deflection coil 18. In addition, a substrate 14 on which an electric circuit is mounted is provided along the tapered portion. The correction structure 20 is provided on the small-diameter side rear end enlarged surface 10a, 12a of the separator 10, 12. Although not shown, horizontal deflection coils are provided on the inner surfaces of the separators 10 and 12.

FIG. 8 shows the correction structure 20 on an enlarged scale. Small-diameter side rear end enlarged surface 10 of separators 10 and 12
A pair of L-shaped ribs 22 and 24 are formed on a and 12a so as to face each other at a predetermined interval, and semicircular ribs 26 and 28 are formed between them along the L-shaped ribs 22 and 24. Has been done. On the other hand, the correction piece 30 is made of a magnetic material, and the folded portion 32 is formed at the end thereof. Correction piece 30
Both sleeves are fitted into the L-shaped ribs 22 and 24 and slide on the semicircular ribs 26 and 28. Correction piece 3
The mounting position of 0 on the separators 10 and 12 is adjusted by sliding the correction piece 30 by the folding portion 32. FIG. 9 shows the # when the correction piece is attached in FIG.
A cross section along line 12- # 12 is shown. As shown in this figure, the correction piece 30 is tightly fitted into the correction structure 20.

Here, an example of misconvergence will be shown. In the example of FIG. 10A, the B (blue) electron beam is outside the R (red) electron beam on the screen. In the case of such an H shift misconvergence pattern, the correction piece 30 is attached at the position shown in FIG. On the contrary, in the example of FIG. 7C, the B electron beam is on the inside of the R electron beam on the screen. In the case of such an H shift misconvergence pattern, the correction piece 30 is attached at the position shown in FIG. The correction amount of the electron beam can be adjusted by moving the correction piece 30 in the direction in which the electron beams are arranged, that is, in the directions of arrows F10 and F12. For example, when the distance between R and B is large, the correction piece 30
To be close to the tube axis direction (tube center axis direction).

As described above, the misconvergence correction structure 20 requires a structure capable of moving the correction piece in the axial direction and holding the correction piece at the optimum position. In the above example, in order to realize, the L-shaped ribs 22 and 24 are arranged facing each other and parallel to the axis so that the correction piece 30 can be slid in the axial direction. Further, in order to realize the above, dimensions are set such that the correction piece 30 is slightly tightly fitted between the upper inner sides 22A and 24A of the L-shaped ribs 22 and 24 and the circular ribs 26 and 28 on the separator 10. Circular ribs 26 and 28 are provided only in a part between the L-shaped ribs 22 and 24 to facilitate the die machining. As such a correction structure, there are those disclosed in Japanese Utility Model Publication Nos. 63-44364 and 63-19753.

On the other hand, when the deflection yoke is shipped, the adjustment C
Once the deflection yoke is attached to the RT (not shown),
The product is shipped after the adjustment described in 0. Then, the shipped deflection yoke is incorporated into a CRT to be commercialized as a display device. However, the CR of each display device
If there is a difference in characteristics between T and the adjusting CRT, it is necessary to provide a new adjusting correction piece on each deflection yoke in accordance with the CRT to be mounted and perform the same adjustment as at the time of shipment. FIG. 11 shows a state of such an adjustment. In addition to the correction piece 30, the adjustment correction piece 34 has an adhesive 36.
It is fixed to the upper surfaces of the L-shaped ribs 22 and 24 by.
Depending on the pattern of misconvergence to be corrected, two correction pieces may be attached to each other at the time of shipment as shown in FIG.

[0007]

However, such an adjusting method has the following inconveniences. (1) It is difficult to improve workability because the adjustment correction piece 34 cannot be temporarily fixed during adjustment. (2) By the time the adhesive 36 solidifies, the adjustment correction piece 34
May cause the position shift of. (3) Since the adjustment correction piece 34 is not temporarily fixed and slidable, the reproducibility of the adjustment is not always good, and it is difficult to position the adjustment correction piece 34 again at the same position. (4) Since the adjustment correction piece 34 is fixed only by the adhesive, when the adhesive strength is weakened due to variation in the amount of the adhesive applied, the adjustment correction piece 34 may fall off. .

The present invention focuses on the above points,
The purpose is to improve the mounting accuracy of the correction piece for adjustment and the position adjustment work, as well as the correction accuracy.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a plurality of insertion spaces which are vertically separated from the small diameter side rear end enlarged surface of the separator by a predetermined distance, and At least one of the plurality of insertion spaces, which has a plurality of insertion spaces extending in a direction parallel to the small-diameter side rear end enlarged surface, and is provided on the small-diameter side rear end enlarged surface. Of the elastic force generated from the side of the correction piece and the elastic force generated from the side of the mounting portion when the correction piece is inserted into the insertion space. A deflection yoke, wherein the correction piece is elastically held by the mounting portion by the elastic force of at least one of the above. Is provided.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments will be described below with reference to the drawings.

Embodiment 1 FIG. 1 shows the main part of a deflection yoke of Embodiment 1. The same parts as those in the conventional example are designated by the same reference numerals. In this embodiment, a pair of mounting ribs 40, 41 each having a shape in which two L-shaped ribs are overlapped with each other are formed in the axial direction along the small-diameter rear end enlarged surface 10a of the separator 10 so as to face each other. There is. Semicircular ribs 26, 28 are formed between the mounting ribs 40, 41 along the mounting ribs 40, 41.

The correction piece 30 is made of a magnetic material, and a folded portion 32 is formed at the end thereof. Correction piece 30
Both sleeves are fitted into the L-shaped ribs 44, 45 of the first stage and slide on the semicircular ribs 26, 28. Similarly, the adjusting correction piece 37 is also made of a magnetic material, and the folded portion 38 is formed at the end thereof. Both sleeves of the adjustment correction piece 37 are fitted into the L-shaped ribs 42 and 43 of the second step, and slide on the arm upper surfaces 44a and 45a of the L-shaped ribs 44 and 45 of the first step. Correction pieces 30, 37
The mounting position on the separator 10 is adjusted by sliding the correction pieces 30 and 37 by the folding portions 32 and 38 according to the correction target.

FIG. 2A shows # A- # A in FIG.
A cross section along the line is shown. As shown in this figure,
The correction piece 30 is tightly fitted into the L-shaped ribs 44 and 45 of the first stage. The adjustment correction piece 37 is fitted between the arm lower surfaces 42b and 43b of the second-stage L-shaped ribs 42 and 43 and the arm upper surfaces 44a and 45a of the first-stage L-shaped ribs 44 and 45, respectively. The space between the mounting ribs 40 and 41, and the lower surface 42 of the arm portion of the second-stage L-shaped ribs 42 and 43
The space between b and 43b and the upper surface 44a, 45a of the arm portion of the L-shaped ribs 44, 45 of the first stage is a space for inserting the correction piece 37. The space between the mounting ribs 40 and 41, and the lower surface 4 of the arm portion of the L-shaped ribs 44 and 45 in the first stage.
The space between 4b and 45b and the small diameter side rear end enlarged surface 10a is a space for inserting the correction piece 30. The space for inserting the correction piece 37 and the space for inserting the correction piece 30 are provided at a predetermined interval in the vertical direction of the small-diameter-side rear end enlarged surface 10a, and extend in the axial direction. Here, the thickness t of the adjustment correction piece 37, the insertion groove width h (the lower surface 42b, 43b of the arm portion of the L-shaped ribs 42, 43 in the second step, and the L in the first step).
The dimension between the upper faces 44a, 45a of the arm ribs 44, 45) is the same.

FIG. 2A shows an example in which the lateral widths of the first-stage correction piece 30 and the second-stage adjustment correction piece 37 are substantially the same. The width of the two correction pieces is different,
When the lateral width L1 of the correction piece of the first step is smaller than the lateral width L2 of the correction piece of the first step, the step is shifted as shown in FIG.
When the lateral width L1> the lateral width L2, the L-time ribs are separately provided without overlapping as shown in FIG. 2 (C).

In the above-described embodiment, the mounting position of the correction piece 37 of the second stage can be determined by the mounting ribs 40 and 41, and the mounting position is not determined by the visual inspection of the operator as in the conventional example. Reproducibility is improved. Further, the mounting ribs 40 and 41 allow the second-stage correction piece 37 to be temporarily fixed without using an adhesive, and the correction piece 37 does not drop in the thickness direction. Therefore, the deflection yoke according to the present embodiment can improve the work of mounting the adjustment correction piece and the position adjustment work, and the accuracy of the correction piece mounting position can be improved due to the improvement of the workability, so that the correction accuracy can also be improved.

Although the embodiment shown in FIG. 2 shows an ideal state in which the thickness t of the adjusting correction piece 37 is equal to the insertion groove width h, the thickness of the correcting piece 37 is actually the same. There is a dimensional variation between t and the insertion groove width h. t> h
If so, the operation force when moving the correction piece in the axial direction (pipe axis direction) becomes large, which is a negative factor in workability.
If <h, the correction piece may move freely in the axial direction and may not be temporarily fixed.

[0016]

[Embodiment 2] Therefore, an embodiment 2 will be described in which the above-mentioned dimensional variation is absorbed on the mounting rib side (that is, the correction piece is held by the elastic force on the mounting rib side). In addition, in the following description, in order to simplify the description, the first-stage L-shaped rib 4
The arm portions 48c and 49c of 8, 49 are the correction pieces 37 of the second stage.
Shall not be bent by the insertion of. Also in this embodiment, the space between the mounting ribs 40 and 41 is
Also, the lower surface 46b of the arm portion of the L-shaped ribs 46, 47 of the second stage,
47b and the upper surface 48 of the arm portion of the L-shaped ribs 48, 49 of the first stage
The space between a and 49a is a space for inserting the correction piece 37. In addition, the space between the mounting ribs 40 and 41, and the lower surface 48 of the arm portion of the L-shaped ribs 48 and 49 of the first stage.
The space between b and 49b and the small-diameter side rear end enlarged surface 10a is a space for inserting the correction piece 30. The space for inserting the correction piece 37 and the space for inserting the correction piece 30 are the rear end enlarged surface 1 on the small diameter side.
It is provided at a predetermined interval in the vertical direction of 0a,
And, it extends in the axial direction.

In the example of the mounting ribs 40 and 41 shown in FIG. 3A, the arm portions 46c and 4 of the L-shaped ribs 46 and 47 of the second stage.
Protrusions 46d and 47d are provided at the tips of 7c (the positions where the protrusions are provided may not be the tips of the arms 46c and 47c, but may be in the middle thereof). The groove width h for insertion between the protrusions 46d and 47d and the arm upper surfaces 48a and 49a of the L-shaped ribs 48 and 49 of the first step is set to h <tmin (where tmin: correction piece 3
The minimum value of the thickness t of 7)
Lower surface 46b, 47b of the arm portion of the L-shaped ribs 46, 47 of the step and upper surface 48a, 49a of the arm portion of the L-shaped ribs 48, 49 of the first step.
And the dimension H> tmax (where, tmax is the maximum value of the variation thickness t of the correction piece 37).

FIG. 3B shows a state in which the correction piece 37 is inserted into the second-stage L-shaped ribs 46, 47 of the mounting ribs 40, 41 shown in FIG. 3A. Since h <tmin,
The protrusions 46d and 47d always come into contact with the correction piece 37, and the protrusions 46d and 47d are th (where t is the finished dimension of the thickness of the correction piece 37, tmin <t <tmax).
Can only be pushed up. That is, the second stage L-shaped rib 46,
If the thickness ta and the length la of the arm portions 46c, 47c of 47 are set to appropriate values for generating elastic force, the arm portions 46c, 47c
A pressing force Fa to the correction piece 37 in the thickness direction of the correction piece due to the deflection of c is always obtained. As a result, the thickness t of the correction piece 37
Even if the dimension of the insertion groove width h varies, the correction piece 37 can be mounted on the mounting ribs 40 and 41 without any delay in the thickness direction of the correction piece (direction perpendicular to the small diameter side rear end enlarged surface 10a). It can be fixed. Furthermore, the operation force for moving the correction piece in the axial direction can be also an appropriate force. Further, since the correction piece 37 does not bend, the correction piece can be attached and the position adjusted without affecting the correction magnetic field, and the stability against correction is high.

Mounting ribs 40 and 41 shown in FIG.
Is the arm portions 48c, 49c of the L-shaped ribs 48, 49 of the first stage
The protrusions 48d and 49d are also provided at the tips of the above (the positions at which the protrusions are provided may not be the tips of the arms 48c and 49c, but may be intermediate portions).

FIG. 3D shows a state in which the correction piece 37 is inserted. The provision of the protrusions 48d and 49d allows the correction piece 37 to contact the arm portions 48c and 49c at one point or in a narrow range. Become. In this contact state, the correction piece 37 is in a more stable contact state than in surface contact, so that a more stable operation force can be obtained as the operation force when moving the correction piece in the axial direction. In addition, with the mold, the groove width h for insertion (the protrusions 48d and 49d of the L-shaped ribs 48 and 49, and L
Even when finely adjusting the dimension between the ribs 46 and 47 and the projections 46d and 47d), it is sufficient to adjust only the height of the projections 48d and 49d, not the entire upper surfaces of the arms 48c and 49c. Therefore, the mold can be easily processed. Further, the confirmation of the dimension of the insertion groove width h is facilitated because the place where the correction piece hits (that is, the place where the dimension should be confirmed) is specified.
(It is not necessary to carefully determine where it actually hits (that is, the place where the dimension should be confirmed) as in the case of hitting the surface.)

In the example shown in FIG. 3, the rib of the second stage has a substantially L shape, but for example, as shown in FIG.
The same effect can be obtained by setting the dimensions of the thickness t and the insertion groove width h in the same manner as described above. FIG.
(B) and (C) show the shapes of the mounting ribs when the horizontal widths of the first and second correction pieces are different.

In the above description, the arm portions 48c and 49c of the L-shaped ribs 48 and 49 in the first stage are the correction pieces 3 in the second stage.
Although it has been described that it does not bend due to the insertion of No. 7, if the necessary pressing force Fa to the correction piece 37 is obtained, the arm 48
The c and 49c may bend.

[0023]

[Third Embodiment] Next, an example in which the variations in the thickness t and the insertion groove width h of the correction piece 37 described above are absorbed by the correction piece 37 side (that is, the elastic rib of the correction piece holds the mounting rib). Is shown as Example 3. When the vertical width J (see FIG. 1) or the thickness t of the correction piece 37 is small, the correction piece itself can have elasticity. Second stage L-shaped ribs 46, 4
When 7 does not bend, for example, as shown in FIG.
When the length l1 of the arm portions 46c and 47c of the second-stage L-shaped rib cannot be made large, l1 <l2 (where l2 is the length of the arm portions 48c and 49c of the first-stage L-shaped ribs 48 and 49). length)
And the insertion groove width h <tmin (where tmin is the minimum value of the variation thickness t of the correction piece 37). With this setting, the correction piece 37 is moved to the second stage L-shaped ribs 46, 47.
5B, the correction piece itself bends in the range of l2-l1 shown in FIG. 5B, and an elastic force is generated. As the reaction force of this deflection, the pressing force Fa to the correction piece is obtained. Therefore,
Even if the thickness t of the correction piece 37 and the dimension of the insertion groove width h vary, the correction piece 37 can be mounted on the mounting ribs 40 and 41 without delay in the thickness direction of the correction piece, and temporary fixing can be performed. Furthermore, the operation force for moving the correction piece in the axial direction can be also an appropriate force.

The mounting ribs 40, 41 have a high rigidity, and the lengths l of the arm portions 46c, 47c of the second-stage L-shaped ribs 46, 47 are l.
If the arms 46c and 47c do not bend even if 1 is increased, the correction piece itself can be bent even if l2 <l1 as shown in FIG. Is obtained. If necessary, the second-stage L-shaped ribs 46, 47
The arm portions 46c, 47c may be provided with protrusions on the arm portions 48c, 49c of the first-stage L-shaped ribs 48, 49. In this way, when the correction piece 37 side is bent, the mounting rib 4
Since the rigidity of 0, 41 can be increased, the mounting ribs 40, 4
It is also possible to attach other members to 1, and the degree of freedom in design is further expanded.

[0025]

Fourth Embodiment Next, as the fourth embodiment, the above-mentioned correction piece 3 is used.
An example in which variations in the dimensions of the thickness t of 7 and the insertion groove width h are absorbed by both the mounting rib side and the correction piece side (Example 2,
Fig. 6 shows a combination of the three ideas. 5C of the third embodiment, the length l1 of the arm portions 46c and 47c of the L-shaped ribs 46 and 47 in the second stage is increased, and the arm portion 4 is increased.
If the thickness u of 6c and 47c is reduced, as shown in FIG. 6A, the correction piece 37 bends and the L-shaped ribs 46 and 4 are formed.
The arm portions 46c and 47c of 7 also bend. (The correction piece 37 is set to have elasticity as in the case of the third embodiment.)

In FIG. 5B of the third embodiment, 1
When the correction piece 30 of the first stage is not attached, the length l of the arm portions 48c, 49c of the L-shaped ribs 48, 49 of the first stage
2 to the arm portions 46c and 47 of the second-stage L-shaped ribs 46 and 47.
When it is made relatively large with respect to the length l1 of c (that is,
l2-l1 is increased), or L of the first stage
Even when the thickness v of the arm portions 48c and 49c of the L-shaped rib is reduced, the correction piece 37 bends and the arm portions 48c and 49c of the L-shaped rib of the first stage also bend, as shown in FIG. 6B.

[0027]

Other Embodiments The present invention has many embodiments and can be variously modified based on the above disclosure. For example, the following is also included. (1) In the above embodiment, the mounting ribs 40 and 41 are provided so as to extend in the axial direction, but they may be provided so as to extend in other directions depending on the correction target. However, the extending direction of the mounting ribs 40 and 41 is parallel to the enlarged rear surface on the small diameter side. (2) In the above-described embodiment, only the mounting ribs 40 and 41 of the correction piece on the small diameter side rear end enlarged surface 10a of the separator 10 are shown, but of course, the mounting ribs are on the small diameter side rear end enlarged surface 10a of the separator 10. And on the small-diameter side rear end enlarged surface 12a of the separator 12. Further, it may be provided on the back surface side of the small-diameter side rear end enlarged surfaces 10a, 12a (the surface on the side opposite to the above embodiment).

(3) The shapes of the mounting rib and the correction piece can be variously modified so as to achieve the same effect. For example, the mounting rib may have a V-shaped or U-shaped convex or concave cross section. Further, a plurality of sets of mounting ribs may be provided in parallel on the small-diameter side rear end enlarged surfaces 10a, 12a. (4) Although the mounting rib has a two-stage structure, it may have a multi-stage structure and three or more correction pieces may be arranged in a stacked manner. Further, there may be an empty stage in which the correction piece is not mounted depending on the correction target.

(5) The material of the correction piece may be a magnetic material, a metal plate such as an iron plate, or an amorphous material capable of adjusting the surrounding magnetic field. Further, the material of the correction piece of each stage may be determined according to the correction target. For example, in the case of misconvergence correction in which the B beam is shifted to the same side with respect to the R beam at the left and right ends of the screen, a correction piece made of silicon steel plate and a correction piece made of Permalloy may be used. .

[0030]

As described above, the present invention has the following effects. (A) Effects common to claims 1 and 2 In the deflection yoke of the present invention, all the mounting positions of the plurality of correction pieces can be determined by the mounting portion, and the mounting positions are determined by the operator's visual inspection as in the conventional example. Not a thing. Further, each correction piece can be slid. Therefore,
The reproducibility of the mounting position of each correction piece is greatly improved. Furthermore, the mounting portion allows the plurality of correction pieces to be temporarily fixed without using an adhesive, and each correction piece does not drop in the thickness direction (direction perpendicular to the rear end enlarged surface on the small diameter side).
Therefore, the deflection yoke of the present invention can improve the work of mounting the adjustment correction piece and the position adjustment work, and can improve the correction accuracy because the accuracy of the correction piece attachment position is improved due to the improved workability.

(B) Effect corresponding to claim 1 Since the deflection yoke according to claim 1 holds the correction piece by the elastic force, the thickness dimension of the correction piece and the insertion space width of the mounting portion are determined. Even if there is variation, the correction piece can be attached to the mounting portion without wobbling in the thickness direction and can be temporarily fixed. Furthermore, the operating force for sliding the correction piece can be adjusted with a more appropriate force.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a first embodiment of the present invention.

FIG. 2 is a diagram showing a cross-sectional shape of a main part of the first embodiment.

FIG. 3 is a diagram showing a cross-sectional shape of a main part of the second embodiment.

FIG. 4 is a diagram showing a cross-sectional shape of a main part of the second embodiment.

FIG. 5 is a diagram showing a cross-sectional shape of a main part of the third embodiment.

FIG. 6 is a diagram showing a cross-sectional shape of a main part of the fourth embodiment.

FIG. 7 is a perspective view showing background art.

FIG. 8 is an enlarged perspective view showing a main part of FIG.

9 is a cross-sectional view showing an enlarged main part of FIG.

FIG. 10 is a diagram showing a correction method using a correction structure.

FIG. 11 is a perspective view showing a background art including an adjusting correction piece.

[Explanation of symbols]

 10, 12 ... Separator 10a, 12a ... Small diameter side rear end enlarged surface 14 ... Substrate 30, 37 ... Correction piece 40, 41 ... Mounting rib 42, 43, 46, 47 ... Second stage L-shaped rib 44, 45, 48 , 49 ... First stage L-shaped rib

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[Procedure amendment]

[Submission date] December 11, 1995

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Fig. 6

[Correction method] Change

[Correction contents]

FIG. 6

Claims (2)

[Claims] 1. A plurality of insertion spaces vertically separated from the enlarged rear surface on the small diameter side of the separator by a predetermined distance, and
At least one of the plurality of insertion spaces having a plurality of insertion spaces extending in a direction parallel to the small-diameter side rear end enlarged surface and provided on the small-diameter side rear end enlarged surface, and the plurality of insertion spaces. A correction piece for adjusting a magnetic field inserted into one insertion space, and when the correction piece is inserted into the insertion space, the elastic force generated from the correction piece side and the elastic force generated from the mounting portion side A deflection yoke, wherein the correction piece is elastically held by the mounting portion by at least one of the elastic forces. 2. A separator having a plurality of insertion spaces vertically spaced from the small diameter side rear end enlarged surface by a predetermined distance, and a plurality of insertion spaces extending in a direction parallel to the small diameter side rear end enlarged surface. A deflection yoke, wherein a mounting portion having a space is provided on the rear end enlarged surface on the small diameter side.