JPH09306383A - Deflection yoke and winding method of deflection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid deviation of a core by winding, and prevent characteristic dispersion of a deflection yoke and the deterioration in a quality by holding and winding a deflection coil in a concentric shape to a coil bobbin by a jig through openings formed in a side surface of a neck bend side end part of the core in a winding process. SOLUTION: Rectangular openings 35 are formed in four places in the axial symmetry to the horizontal axis X and the vertical axis Y crossing tube axis of a cathode-ray tube in a side surface of a neck bend side end part of a core 7 on the outer periphery of an outside bobbin 31. In a winding process, a jig 37 is inserted from the respective openings 35, and a vertical deflection coil is wound in a condition where the core 7 is positioned and held to a vertical coil bobbin by the jig 37. Therefore, deviation of the core when the core is pressed by a magnet wire can be effectively avoided, and a quality of a deflection yoke can be improved by that extent, and dispersion can be reduced.

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 a winding method for the deflection yoke. The present invention is applied to a deflection yoke for winding a vertical deflection coil while holding a core inside a coil bobbin, and the core is attached to the coil bobbin. By positioning and winding, the core is effectively avoided from being biased with respect to the coil bobbin.

[0002]

2. Description of the Related Art In a conventional deflection yoke, after assembling a core and a coil bobbin, a magnet wire is wound integrally with the core and a vertical deflection coil is wound by section winding. In such a deflection yoke, there are a configuration in which the core is held outside the coil bobbin and a configuration in which the core is held inside the coil bobbin. In the latter, the core in each deflection coil is different from the former. Since they can be arranged close to each other, the deflection efficiency is correspondingly high.

That is, FIG. 3 is a perspective view showing the former deflection yoke. In the deflection yoke 1, the adjustment coil 3, the adjustment knob 4 and the like are attached to the back cover 2 in a separate step in advance, the back cover 2 is attached to the coil assembly 6 together with the front cover 5, and then wiring and adjustment are performed. It is created through such work.

FIG. 4 is a side view showing the coil assembly 6, and FIG. 5 is a perspective view showing the coil assembly 6 with the magnet wire omitted. In this coil assembly 6, a front coil bobbin 8 and a rear coil bobbin 9 are integrated by inserting a front bobbin 8 and a rear bobbin 9 from the front and rear of a substantially conical cylindrical core 7 to form a vertical coil bobbin 10. . Here, the front bobbin 8 has an end portion on the funnel bend side, and the rear bobbin 9 has an end portion on the neck bend side.
Is formed, and a winding groove is formed on the inner peripheral side surface.

As a result, in the coil assembly 6, the magnet wire is hooked on the protrusion 11 and run along the winding groove, and the vertical deflection coil V is wound in a saddle shape while the core 7 is held on the vertical coil bobbin.

In the coil assembly 6, when the vertical deflection coil V is wound in this manner, the front bobbin 12 for the horizontal deflection coil 12 is arranged before and after the vertical coil bobbin 10.
The front bobbin 12 and the rear bobbin 13 form a horizontal coil bobbin 14 by inserting and integrating the rear bobbin 13 and the rear bobbin 13. Front bobbin 1 here
Similar to the vertical coil bobbin 10, the L-shaped projection 15 is formed on the second and rear bobbins 13, and the winding groove 16 is formed on the inner peripheral side surface.

Thus, in the coil assembly 6, like the vertical deflection coil V, the magnet wire is wound using the protrusion 15 and the winding groove 16, and the horizontal deflection coil H is wound integrally with the vertical deflection coil V in a saddle shape. It is designed to line. Thus, by winding in this manner, the substantially conical cylindrical core 7 having high dimensional accuracy can be applied, and the variation in the convergence characteristics and the like can be reduced accordingly.

On the other hand, FIG. 6 is a front view (FIG. 6 (A)) and a side view (FIG. 6 (B)) showing the latter vertical coil bobbin configured to hold the core inside the coil bobbin. The vertical coil bobbin 20 is formed by holding the core 7 inside the outer bobbin 21, then inserting the inner bobbin 22 from the funnel bend side, and integrating the inner bobbin 22 with the outer bobbin 21.

Here, on the neck bend side of the outer bobbin 21,
An elastic piece 21a as a positioning member is arranged on the inner side, and the elastic piece 21a absorbs the variation in the dimensional accuracy of the core 7, and positions the core 7 concentrically with respect to the outer bobbin 21. Similarly, an elastic piece is arranged on the funnel bend side of the outer bobbin 21, and this elastic piece absorbs variations in the dimensional accuracy of the core 7, and positions the core 7 concentrically with respect to the outer bobbin 21. As a result, the outer bobbin 21 positions and holds the core 7 coaxially.

Further, the outer bobbin 21 has an L-shaped projection 24 at the end portion on the neck bend side, and extends to the funnel bend side on the inner peripheral side so as to correspond to the L-shaped projection 24. The rib forms the winding groove 25. Correspondingly, the inner bobbin 22 has an L-shaped protrusion 26 at the end of the funnel bend side, and extends to the neck bend side on the inner peripheral side in correspondence with the L-shaped protrusion 26. The winding groove 27 is formed by the rib.

As a result, even in the vertical coil bobbin configured to hold the core inside the coil bobbin, the core 7
The projections 24, 26 and the winding groove 2 while holding the
5, 27, a magnet wire is wound and the vertical deflection coil V is wound in a saddle shape. Further, after winding the vertical deflection coil V in this way, a horizontal coil bobbin is assembled and the horizontal deflection coil is wound in a saddle shape,
It is adapted to form a coil assembly.

[0012]

In the deflection yoke, a pair of vertical deflection coils are symmetrically arranged with respect to the tube axis of the cathode ray tube to generate a vertical deflection magnetic field. In the winding process, first, one vertical deflection coil is wound, and then the other vertical deflection coil is wound to wind the pair of vertical deflection coils on the vertical coil bobbin.
FIG. 7 is a plan view showing a state in which one of the vertical deflection coils is wound.

At this time, in the winding step, the magnet wire 28 made of a wire is wound by applying a tension of about 1 kg. In the vertical coil bobbin 20, the magnet wire 28 directly contacts the core 7 on the neck bend side, and the core 7 is pressed by the tension applied to the magnet wire 28. Vertical coil bobbin 20
In the above, although the elastic piece 21a for positioning the core 7 is arranged, the pressing force by the magnet wire 28 cannot be completely resisted, so that in the core 7,
The vertical coil bobbin 20 is biased and held on the side of the vertical deflection coil that is wound first. By the way, this elastic piece 21
This deviation can be reduced by making a difficult to bend, but there is a problem that it becomes difficult to assemble the vertical coil bobbin 20 when the core 7 varies.

As a result, in the deflection yoke having a structure in which the core is held inside the coil bobbin, there is a problem that the core is biased by the winding.

When the core is biased with respect to the vertical coil bobbin as described above, asymmetric misconvergence or the like occurs.
In particular, the core 7 integrally formed in such a substantially conical cylindrical shape
However, the dimensional accuracy is higher than that of a so-called split core, but the dimensional accuracy is inferior to that of a coil bobbin. As a result, the deviation of the core is
Of the deflection yoke, the characteristics of the deflection yoke vary and the quality of the deflection yoke deteriorates.

The present invention has been made in consideration of the above points, and proposes a deflection yoke which can be effectively applied to a deflection yoke having a structure in which a core is held inside a coil bobbin so as to effectively avoid the deviation of the core. Is what you are trying to do.

[0017]

In order to solve such a problem, in the present invention, an opening is formed in the side surface of the coil bobbin on the neck bend side end and / or the funnel bend side end of the core.

Further, the jig is used to position the core concentrically with respect to the coil bobbin, and the wire is wound.

If an opening is formed in the side surface of the end portion on the neck bend side and / or the end portion on the funnel bend side of the core, the core can be positioned and held through this opening. As a result, by positioning using this opening, it is possible to effectively avoid the bias of the core and perform the winding.

Further, in the winding step, the winding can be performed while effectively avoiding the deviation of the core even by simple positioning with a jig.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view and a side view showing a vertical coil bobbin. In this embodiment, this vertical coil bobbin 30 is applied instead of the vertical coil bobbin 20 described above with reference to FIG. This vertical coil bobbin 3
0, the same configurations as those in FIG. 6 are denoted by the corresponding reference numerals, and duplicate description will be omitted.

That is, the vertical coil bobbin 30 is formed by holding the core 7 inside the outer bobbin 31, then inserting the inner bobbin 32 from the funnel bend side, and integrating the inner bobbin 32 with the outer bobbin 31. .
Further, the vertical coil bobbin 30 includes an elastic piece 21a arranged on the neck bend side and the inner side of the outer bobbin 31, and an elastic piece arranged on the funnel bend side of the outer bobbin 31, respectively. The bend side is held concentrically, thereby absorbing the variation in dimensional accuracy of the core 7, and positioning and holding the core 7 coaxially.

Further, the outer bobbin 31 and the inner bobbin 32
Has an L-shaped projection 24 at the end, and on the inner peripheral side,
The winding grooves 25 and 27 are formed so that the vertical deflection coil can be formed in a saddle shape by section winding.

In addition to the above construction, the outer bobbin 31
Has a rectangular opening 35 formed on the side surface of the core 7 on the neck bend side. As shown in FIG. 2, the opening 35 has a cross section taken along the line AA, and is formed on the outer circumference of the outer bobbin 31 in axial symmetry with respect to the horizontal axis X and the vertical axis Y which intersect the tube axis of the cathode ray tube. It is formed in four places. As a result, the outer bobbin 31 inserts the jig 37 through each opening 35 in the winding process,
Thus, the core 7 can be positioned and held with respect to the vertical coil bobbin 30.

A vertical deflection coil is wound on the vertical coil bobbin 30 while being positioned by the jig 37.
Thus, even if the core 7 is pressed by the magnet wire, the bias of the core 7 can be effectively avoided.

With the above structure, the deflection yoke according to this embodiment first holds the core 7 inside the outer bobbin 31 in the winding step (FIG. 1), and the inner bobbin 32 is inserted into this core 7. To form a vertical coil bobbin 30, and the vertical coil bobbin 30 is mounted on the winding machine. In this winding machine, a jig 37 is inserted into the vertical coil bobbin 30 (FIG. 2) from an opening 35 formed in the side surface of the end portion of the core 7 on the neck bend side. The core 7 is positioned and held concentrically, and in this state, the vertical deflection coil is wound in a saddle shape by the L-shaped projection 24 and the winding grooves 25 and 27.

At this time, since the core 7 is coaxially positioned and held with respect to the vertical coil bobbin 30 by the jig 37, the bias is effectively avoided even when pressed by the magnet wire at the time of winding, and the winding is wound. After finishing, the elastic piece 21a of the outer bobbin 31, etc.
It is held coaxially on a vertical coil bobbin.

This deflection yoke is manufactured by winding the horizontal deflection coil around the vertical deflection coil thus formed and then passing through an assembly such as a front cover.

According to the above construction, the opening 35 is formed on the side surface of the end portion on the neck bend side of the core 7, and the core 7 is concentrically held on the vertical coil bobbin through the opening 35 during winding. As a result, it is possible to effectively avoid the bias of the core 7 due to the winding. Therefore, the assembly accuracy of the deflection yoke can be improved accordingly, and the quality of the deflection yoke can be improved.
In addition, variations can be reduced.

Further, in this way, during winding, the core 7 is
In the elastic piece 21a of the outer bobbin 31 which positions the core 7 in the same manner, it is possible to absorb variations in the core 7 and secure sufficient assembly efficiency, and the core 7 is not biased due to changes over time. It is possible to set a moderate amount of bending. Therefore, the efficiency of assembly can be improved accordingly.

In the deflection yoke according to the above-mentioned embodiment, the case where the opening is formed in a rectangular shape has been described, but the present invention is not limited to this, and the opening can be formed in various shapes.

Further, in the deflection yoke according to the above-described embodiment, the case where the outer bobbin and the inner bobbin are combined to form the vertical coil bobbin has been described, but the present invention is not limited to this and the outer bobbin alone is used to form the vertical coil bobbin. It can be widely applied to the case of forming. In this case, in the magnet wire, by pressing the entire inner surface of the core, not only on the neck bend side,
Even on the funnel bend side, the core becomes biased. Therefore, in such a case, biasing of the core can be prevented by positioning and holding the core 7 concentrically on both the funnel bend side and the neck bend side.

Further, in the deflection yoke according to the above-described embodiment, the case where four openings are formed in axial symmetry with respect to the horizontal axis X and the vertical axis Y has been described, but the present invention is not limited to this, and is practically used. In order to prevent the core from being biased only in the horizontal direction within a sufficiently large range, two openings may be formed on the horizontal axis X and symmetrically with the vertical axis Y, if necessary. The number and position of the openings can be freely selected.

Further, in the winding process according to the above-mentioned embodiment, the case where the core is positioned and wound through the opening formed in the vertical coil bobbin has been described, but the present invention is not limited to this and, for example, winding. Various positioning and holding methods can be widely applied, such as when a jig is inserted through the opening of the core to hold and position the wire as long as the line is not obstructed. When the core is positioned through the opening formed in the vertical coil bobbin as in the deflection yoke according to the above-described embodiment, the positioning can be performed without obstructing the opening of the core, which reduces the winding efficiency accordingly. Can be effectively avoided.

[0036]

As described above, according to the present invention, the core is held inside the coil bobbin and applied to the deflection yoke for winding the vertical deflection coil, the core is positioned by the jig, and the coil bobbin is further positioned. By locating and winding the core through the opening formed in, the bias of the core with respect to the coil bobbin can be effectively avoided, and the quality of the deflection yoke can be improved and the variation can be reduced. .

[Brief description of drawings]

FIG. 1 is a front view and a side view showing a vertical coil bobbin applied to a deflection yoke according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view for explaining a winding of the vertical coil bobbin of FIG.

FIG. 3 is a perspective view showing a schematic configuration of a conventional deflection yoke.

FIG. 4 is a side view showing the coil assembly of FIG. 3.

5 is a perspective view showing the coil assembly of FIG. 4 with a magnet wire omitted.

FIG. 6 is a front view and a side view showing a vertical coil bobbin of a coil assembly according to another conventional method.

7 is a front view for explaining the winding of the vertical coil bobbin of FIG.

[Explanation of symbols]

1 ... Deflection yoke, 6 ... Coil assembly, 7 ...
Core, 10 ... Vertical coil bobbin, 14 ... Horizontal coil bobbin, 21, 31 ... Outer bobbin, 23, 32 ... Inner bobbin, 35 ... Opening, 37 ... Jig, H ... Horizontal deflection coil, V ... ... Vertical deflection coil

Claims (3)

[Claims] 1. A deflection yoke in which a coil having a substantially conical cylindrical shape is disposed inside a coil bobbin having a substantially funnel shape, and a wire rod is wound around the coil bobbin and the core to wind a deflection coil. A deflection yoke having an opening at a side surface of a neck bend side end and / or a funnel bend side end of the core. 2. A method of winding a deflection yoke, comprising: arranging a substantially conical cylindrical core inside a substantially funnel-shaped coil bobbin, and then winding a wire rod around the coil bobbin and the core to wind a deflection coil. A winding method of a deflection yoke, wherein the wire is wound by positioning the core with respect to the coil bobbin with a jig. 3. The winding method for the deflection yoke according to claim 2, wherein the jig holds and positions the core through an opening formed in a side surface of the coil bobbin.