JP2000182539A - Deflection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To combine a horizontal deflection coil with a vertical deflection coil without causing displacement of a center axis and easily perform stroke adjustment. SOLUTION: A deflection yoke 10 is equipped with a horizontal deflection coil 20 and a vertical deflection coil 30 having tubular funnel-side separators 22, 32, respectively, radially expanded toward the other end side thereof with a first flange part 22c and a second flange part 32b formed thereon, respectively, and the deflection yoke 10 is disposed inside the horizontal deflection coil 20. The first flange part 22c is provided with a projection part 23 building up toward the second flange part 32b and extending over the whole of the periphery of the first flange part 22c, the second flange part 32b is provided with a recessed part 33 fitting to the projection part 23 and extending over the whole of the periphery of the second flange part 32b, and the projection part 23 and the recessed part 33 are formed so that, when they are fitted to each other, the center axes D of the horizontal deflection coil 20 and of the vertical deflection coil 30 substantially coincide with each other and can make turning motion centering around the center axis D.

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 applied to a cathode ray tube constituting a computer display or the like.

[0002]

2. Description of the Related Art A deflection yoke applied to a conventional cathode ray tube is provided with, for example, a horizontal deflection coil or a vertical deflection coil, and is held at a neck of the cathode ray tube to form a deflection magnetic field of the cathode ray tube. It has been known. Usually, this deflection yoke is manufactured by performing crosstalk adjustment and the like after the horizontal deflection coil and the vertical deflection coil manufactured in the winding process are assembled in the assembly process.

[0003] For example, conventionally, in the winding step, the horizontal deflection coil and the horizontal deflection coil each have a cylindrical shape whose diameter increases from the opening at one end to the opening at the other end, and spread outward to the other end. To the separator with the brim,
The conductor is wound and formed. Next, in an assembling process, the horizontal deflection coil is inserted into the vertical deflection coil from one end side thereof, and is assembled so that their respective central axes substantially coincide with each other. Thereafter, a crosstalk adjusting operation is performed on the deflection yoke assembled as described above.

The crosstalk adjusting operation is performed by connecting a horizontal deflection coil or a vertical deflection coil to a predetermined AC power source and setting the horizontal deflection coil and the vertical deflection coil so that the induced voltage of the vertical deflection coil or the horizontal deflection coil becomes a minimum value. This is the work of adjusting the relative position of the. The induced voltage of the vertical deflection coil or the horizontal deflection coil becomes the minimum value when the orthogonality between the horizontal deflection coil and the vertical deflection coil is good. Therefore, as shown in the schematic diagram of FIG. 5, the crosstalk adjustment is performed by moving the horizontal deflection coil 20 and the vertical deflection coil 30 assembled so that the central axes D substantially coincide with each other with the arrow E centered on the central axis D. The rotation is performed as shown in FIG.

[0005]

However, in the conventional deflection yoke, each of the horizontal deflection coil and the horizontal deflection coil is assembled so as to be rotatable so that the crosstalk can be adjusted. It is not assembled so as to restrict movement in the X and Y directions other than the rotation direction of the coil.

For this reason, when the horizontal deflection coil is installed inside the vertical deflection coil due to the assembling accuracy in the assembling process, the distortion of the separator, or the winding condition, the center axis of the horizontal deflection coil or the vertical deflection coil is shifted in the X direction. , The center axis shifts in the Y direction. In addition, since the horizontal deflection coil and the vertical deflection coil are not assembled so as to restrict the movement in the X direction and the Y direction, the horizontal deflection coil and the vertical deflection coil are not adjusted even in the subsequent crosstalk adjustment. The center axis shift occurs when rotating. This makes crosstalk adjustment difficult.

If the center axis shift occurs, a desired convergence characteristic cannot be obtained, and the deflection yoke becomes defective. Alternatively, it is necessary to perform correction based on the center axis shift. For example, if the center axis shift occurs in the crosstalk adjustment process, the adjustment requires a long time due to an increase in the number of operations. Therefore, the occurrence of the deviation of the central axis causes a decrease in the productivity of the deflection yoke.

Therefore, the deflection yoke which can assemble the horizontal deflection coil and the vertical deflection coil without causing a center axis shift and which can easily adjust the crosstalk for adjusting the orthogonality between the horizontal deflection coil and the vertical deflection coil. The development of is eagerly awaited.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention forms a deflecting magnetic field of a cathode ray tube while being held by a neck of the cathode ray tube. A horizontal deflection coil and a vertical deflection coil formed by winding a conductive wire are provided on a separator having a cylindrical shape whose diameter is expanded and having a flange portion extending outward on the other end side. A deflecting yoke inserted from one end of the deflecting yoke to the inside of the vertical deflecting coil; While being provided throughout,
On the other side, a concave portion fitted to the convex portion is provided over the entire periphery of the collar portion, and the central axes of the horizontal deflection coil and the vertical deflection coil substantially coincide with each other when the convex portion and the concave portion are fitted to each other. Thus, the horizontal deflection coil and the vertical deflection coil are formed so as to be rotatable about the central axis.

In the deflection yoke of the present invention, one of the flange portions of the horizontal deflection coil and the vertical deflection coil is formed with a convex portion rising toward the other, and the other is formed with a concave portion fitted with the convex portion. In addition, the convex portion and the concave portion are formed such that the central axes of the horizontal deflection coil and the vertical deflection coil substantially coincide with each other when they are fitted. For this reason, in the process of assembling the vertical deflection coil and the horizontal deflection coil, only by inserting the horizontal deflection coil inside the vertical deflection coil and fitting the convex portion and the concave portion, the assembly accuracy, the distortion of the separator, or the winding Regardless of the wire condition, the horizontal deflection coil and the vertical deflection coil are assembled with their central axes substantially aligned.

In addition, the convex portion and the concave portion are respectively provided over the entire periphery of the collar portion, and the convex portion and the concave portion are centered on the horizontal deflection coil and the vertical deflection coil in a state where they are fitted. It is formed so as to be rotatable about an axis. Therefore, the assembled horizontal deflection coil and vertical deflection coil are arranged in a state where movement in the X direction and the Y direction other than the rotation direction about the central axis is restricted. Therefore, the crosstalk adjustment work of adjusting the orthogonality between the horizontal deflection coil and the vertical deflection coil by rotating the horizontal deflection coil and the vertical deflection coil without causing the center axis deviation of the horizontal deflection coil and the vertical deflection coil is performed. Easy to do.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a deflection yoke according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of a deflection yoke according to the present invention.
Is a side view, and (b) is an arrow view when (a) is observed from an A direction. FIGS. 2A and 2B are explanatory views showing a main part of a horizontal deflection coil which is a constituent member of the deflection yoke according to the embodiment. FIG. 2A is a side view, and FIG. 2B is a view when (a) is observed from the B direction. FIG. 3A and 3B are explanatory views showing a main part of a vertical deflection coil which is a component of the deflection yoke according to the embodiment. FIG. 3A is a side view, and FIG.
FIG. 7 is a view as viewed from the direction of arrow C when viewed from the C direction. FIG.
1 is an exploded side view of a deflection yoke according to one embodiment.

As shown in FIG. 1, a deflection yoke 10 according to the present embodiment is held by a neck of a cathode ray tube to form a deflection magnetic field of the cathode ray tube. It is provided with.

The horizontal deflection coil 20 has an annular neck-side separator 21 disposed on the neck side of the cathode ray tube, and a funnel-side separator 22 disposed on the funnel side of the cathode ray tube with respect to the neck side separator 21. Consist of things. As shown in FIG. 2, the funnel-side separator 22 has a cylindrical shape whose diameter increases from an opening 22 a at one end to an opening 22 b at the other end, and spreads outward toward the other end. A flange portion (hereinafter, referred to as a first flange portion) 22c is formed.

The first flange portion 22c includes a vertical deflection coil 3
0 is formed in the opening 2 at one end of the funnel-side separator 22.
2a while standing up to the first flange 2
2c is formed over the entire periphery. A conductive wire (not shown) is wound around the funnel-side separator 22 in, for example, a section.

As shown in FIGS. 1 and 4, the vertical deflection coil 30 has a neck side separator 31 disposed on the neck side of the cathode ray tube, and a funnel side disposed on the funnel side of the cathode ray tube with respect to the neck side separator 31. And a separator 32. Then, it is formed in a cylindrical shape whose diameter is expanded from the opening 31a of the neck-side separator 31 serving as the opening at one end thereof to the opening 32a of the funnel-side separator 32 serving as the opening at the other end of the vertical deflection coil 30. .

At this time, the vertical deflection coil 30 has a larger diameter than the funnel-side separator 22 so that the funnel-side separator 22 of the horizontal deflection coil 20 which is arranged as described later can be inserted therein. It is formed in a shape. In addition, the funnel-side separator 32 at the other end of the vertical deflection coil 30 has a flange 32b (hereinafter, referred to as a second flange) which spreads outwardly toward the bottom.

The horizontal deflection coil 2 is provided in the second flange portion 32b.
The concave portion 33 that fits with the convex portion 23 formed on the first flange portion 22c of the first
The second flange portion 32b is formed over the entire periphery of the second flange portion 32b so as to face outward on the side 2a. A conductor (not shown) is wound, for example, in a section around such a neck-side separator 31.

As shown in FIG. 4, the deflection yoke 10 according to the present embodiment is incorporated with the horizontal deflection coil 20 inserted into the vertical deflection coil 30 from one end of the funnel-side separator 22. Further, the horizontal deflection coil 20 is disposed at one end (neck side end) of the funnel-side separator 22 of the horizontal deflection coil 20 and the vertical deflection coil 30.
Are assembled in a state where the neck-side separator 21 is arranged.

Therefore, the second flange 32 of the vertical deflection coil 30 is placed on the first flange 22c of the horizontal deflection coil 20.
b is placed. Then, the first collar portion 22c
The convex portion 23 is formed on the side facing the second flange portion 32b so as to rise toward the second flange portion 32b,
The concave portion 33 is formed at a position corresponding to the convex portion 23 on the side of the second flange portion 32b facing the first flange portion 22c. The convex portion 23 and the concave portion 33 are formed so that the central axes D of the vertical deflection coil 30 and the horizontal deflection coil 20 inserted inside the vertical deflection coil 30 in a state where they are fitted are substantially coincident with each other. Each of the deflection coil 20 and the vertical deflection coil 30 is formed so as to be rotatable about a central axis D.

For example, in the present embodiment, the horizontal deflection coil 20 and the vertical deflection coil 30 restrict the movement in the X and Y directions other than the rotation direction about the central axis D while forming Are formed slightly larger than the convex portions 23. When the horizontal deflection coil 20 is installed inside the vertical deflection coil 30, the width of the projection 23 is gradually reduced toward the tip so that the projection 23 can be easily inserted into the recess 33. ing.

As described above, in the deflection yoke 10 according to the present embodiment, the convex portion 23 rising toward the second flange portion 32b of the vertical deflection coil 30 is formed on the first flange portion 22c of the horizontal deflection coil 20. Second of the vertical deflection coil 30
A concave portion 33 fitted to the convex portion 23 is formed in the flange portion 32b, and the central axis D of the horizontal deflection coil 20 and the central axis D of the vertical deflection coil 30 substantially coincide with each other when the convex portion 23 and the concave portion 33 are fitted. It is formed as follows.

Therefore, when assembling the horizontal deflection coil 20 and the vertical deflection coil 30, the funnel-side separator 22 of the horizontal deflection coil 20 is inserted inside the vertical deflection coil 30 to fit the projection 23 and the recess 33. The horizontal deflection coil 20 and the vertical deflection coil 30 are always moved to the center axis D regardless of the assembly accuracy, the distortion of the separators 22, 31, 32, or the winding condition.
Can be assembled in such a manner that they substantially coincide with each other, and the displacement of the center axis in the assembling process can be prevented.

The protrusion 23 is formed over the entire periphery of the first flange 22c, and the recess 33 is formed over the entire periphery of the second collar 32b. Since the horizontal deflection coil 20 and the vertical deflection coil 30 are formed so as to be rotatable about the central axis D in the fitted state with the concave portion 33, as shown in FIG. The assembled horizontal deflection coil 20 and vertical deflection coil 30 have their central axes D
X other than the rotation direction (indicated by a solid line arrow E)
The movement in the direction and the Y direction (indicated by the two-dot chain line arrow F) is restricted.

Therefore, the center axes of the horizontal deflection coil 20 and the vertical deflection coil 30 do not deviate from each other.
As shown in (1), the funnel-side separator 22 of the horizontal deflection coil 20 and the neck-side separator 31 and the funnel-side separator 32 of the vertical deflection coil 30 are rotated about the center axis D, so that the horizontal deflection coil 20 and the vertical deflection coil 30 The crosstalk adjusting operation for adjusting the orthogonality of the two can be easily performed.

As a result, the deflection yoke 1 due to the deviation of the center axis
It is possible to reduce the number of occurrences of 0 defects and to reduce the number of correction steps due to the center axis deviation.
In addition, the number of operations in the crosstalk adjustment process can be reduced,
Crosstalk adjustment can be performed in a short time. As a result, a high-quality deflection yoke 10 can be manufactured with high productivity.

In the present embodiment, an example was described in which the flange portion of the funnel-side separator of the horizontal deflection coil was provided with a convex portion, and the concave portion was provided in the flange portion of the funnel-side separator of the vertical deflection coil. It is sufficient that a convex portion is formed on one of the flange portions of the horizontal deflection coil and the vertical deflection coil, and a concave portion for fitting the convex portion is formed on the other side, and is not limited to this example. For example, the configuration may be such that a concave portion is provided on the flange portion of the funnel-side separator of the horizontal deflection coil, and a convex portion is provided on the flange portion of the funnel-side separator of the vertical deflection coil. Also in this case, the horizontal deflection coil and the vertical deflection coil are in a state where the movement in the X direction and the Y direction other than the rotation direction about these central axes is restricted, so that the same as in the above embodiment. The effect can be obtained.

[0028]

As described above, according to the deflection yoke according to the present invention, a convex portion is formed on one of the brim portions of the horizontal deflection coil and the vertical deflection coil, and a concave portion is formed on the other side. And the concave portion are formed such that the central axes of the horizontal deflection coil and the vertical deflection coil are substantially coincident with each other when they are fitted together. It is possible to prevent the center axis from shifting during the assembly process of the deflection coil. Further, the convex portion and the concave portion are respectively provided over the entire periphery of the collar portion, and the horizontal deflection coil and the vertical deflection coil are formed in a rotatable state in a state where they are fitted, so that the crosstalk adjustment is performed. Work can be performed easily. Therefore, it is possible to reduce the number of occurrences of the deflection yoke failure due to the center axis shift, to reduce the number of correction steps due to the center axis shift, and to reduce the number of operations in the crosstalk adjustment step, thereby reducing the time required for the crosstalk adjustment. Is obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a deflection yoke according to the present invention, wherein FIG. 1 (a) is a side view, and FIG. 1 (b) is an arrow view when (a) is observed from an A direction.

FIG. 2 is an explanatory view showing a main part of a horizontal deflection coil which is a component of the deflection yoke according to one embodiment of the present invention;
(A) is a side view, (b) is an arrow view when (a) is observed from the B direction.

FIG. 3 is an explanatory diagram showing a main part of a vertical deflection coil which is a component of the deflection yoke according to one embodiment of the present invention;
(A) is a side view, (b) is an arrow view when (a) is observed from a C direction.

FIG. 4 is an exploded side view of a deflection yoke according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating crosstalk adjustment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Bobbin, 20 ... Horizontal deflection coil, 21, 31 ... Neck side separator, 22, 32 ... Funnel side separator, 22a ... One end opening, 22b ... Other end opening, 22c
... First flange portion, 23... Convex portion, 30... Vertical deflection coil, 3
1a, 32a opening, 32b second flange, 33 recess, D central axis

Claims (1)

[Claims] 1. A tube which is held by a neck of a cathode ray tube and forms a deflection magnetic field of the cathode ray tube, and has a cylindrical shape whose diameter increases from an opening at one end to an opening at the other end, and is formed on the other end side. A horizontal deflection coil and a vertical deflection coil formed by winding a conductive wire on a separator having a flange portion extending outward are provided, and the horizontal deflection coil is inserted into the vertical deflection coil from one end thereof. In the deflection yoke arranged at one side, a convex portion rising toward the other is provided on one of respective flange portions of the horizontal deflection coil and the vertical deflection coil over the entire periphery of the collar portion, and the other is provided on the other side. A concave portion fitted with the convex portion is provided over the entire periphery of the collar portion, and the horizontal deflection coil and the vertical deflection coil are provided when the convex portion and the concave portion are fitted to each other. Deflection yoke, each of and the horizontal deflection coil and the vertical deflection coil such that the center axis coincides substantially is characterized by comprising formed in rotatable state around the central axis.