JPH09259793A - Deflection yoke - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange a wire rod in close vicinity to a cathode-ray tube by that extent, and improve deflecting sensitivity by setting a depth of winding grooves according to a winding quantity of the wire rod wound round the respective winding grooves. SOLUTION: In a coil assembly 20, a horizontal coil bobbin 21 and a vertical coil bobbin 22 are formed so that a depth D of respective winding grooves M can be selected according to the winding number of magnet wires 24 alloted to the respective winding grooves M. Therefor, the magnet wires 24 wound round the respective winding grooves M are arranged in closer vicinity to a glass surface of a cathode-ray tube than usual. Therefore, when a depth D of the respective winding grooves M is selected, since the magnet wires 24 can be arranged in closer vicinity to the cathode-ray tube than usual, deflecting sensitivity can be improved by that extent.

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 which forms a horizontal coil and / or a vertical coil by section winding, and sets the depth of the winding groove according to the winding amount of each winding groove. By doing so, the deflection sensitivity is improved.

[0002]

2. Description of the Related Art Conventionally, in some deflection yokes, a horizontal coil and a vertical coil are formed by section winding.

That is, FIG. 4 is a perspective view showing a deflection yoke of this type. The deflection yoke 1 of this type has a front cover 3, a coil assembly 2 formed of a horizontal coil, a vertical coil and a core. After the back cover 4 is attached, the adjustment coil 6 and the adjustment knob 7 are attached to the back cover 4.
Etc. are attached and formed.

FIG. 5 is a side view showing the coil assembly 2. In the winding process, the coil assembly 2 has a horizontal coil bobbin 8 in which a substantially funnel shape is divided into two parts by a plane including a central axis and a magnet. A horizontal coil H is formed by winding the wire. This horizontal coil H
By hooking the magnet wire on the projections 9 formed on the funnel side end portion and the neck side end portion of the horizontal coil bobbin 8 and running the magnet wire along the winding groove formed inside the horizontal coil bobbin 8. It is formed by winding a magnet wire in a saddle shape. At this time, the horizontal coil H selects a winding groove and a protrusion and winds the magnet wire, thereby allocating the magnet wire to each winding groove by a preset number of windings, thereby accurately forming a desired magnetic field distribution. It is made possible. In the manufacturing process of the deflection yoke, the pair of horizontal coils thus wound is assembled to form a substantially funnel-shaped horizontal coil assembly.

On the other hand, the vertical coil V is similar to the horizontal coil H with respect to the vertical coil bobbin 10 in which a substantially funnel shape is divided into two by a plane including the central axis. It is formed by hooking the magnet wire on the protrusion 9 formed on the magnet and running the magnet wire along the winding groove formed inside the vertical coil bobbin 10. At this time, in the vertical coil V, magnet wires are assigned to the respective winding grooves by a preset number of windings, whereby a desired magnetic field distribution can be accurately formed.

In the manufacturing process of the deflection yoke, after assembling the pair of vertical coils V wound in this way so as to surround the outer side of the substantially funnel-shaped horizontal coil assembly,
Further, a conical tube-shaped core 11 is arranged so as to surround the outside of the vertical coil V.

[0007]

If the deflection sensitivity can be improved in this type of deflection yoke,
The power consumption and heat generation of the deflection yoke can be reduced accordingly. In addition, the deflection frequency can be correspondingly increased.

The present invention has been made in view of the above points, and is intended to propose a deflection yoke capable of improving the deflection sensitivity.

[0009]

In order to solve such a problem, in the present invention, the depth of the winding groove is set according to the winding amount of the wire material wound in each winding groove.

If the depth of the winding groove is set in accordance with the winding amount of the wire rod, the wire rod wound in each winding groove can be arranged close to the glass surface of the cathode ray tube, and the deflection amount is increased accordingly. The sensitivity can be improved.

[0011]

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

(1) First Embodiment FIG. 1 is a sectional view showing a section of a coil assembly. In the deflection yoke according to the embodiment of the present invention,
Instead of the coil assembly 2 described above with reference to FIG.
This coil assembly 20 is applied.

In this coil assembly 20, like the conventional coil assembly 2, the magnet wire 24 is wound on a horizontal coil bobbin 21 having a substantially funnel shape divided into two parts by a plane including the central axis by section winding. To form a horizontal coil, and a similar vertical coil bobbin 22 is wound with a magnet wire 24 to form a vertical coil. Furthermore, the coil assembly 20
A pair of horizontal coils is assembled to face each other to form a substantially funnel-shaped horizontal coil assembly, and a pair of vertical coils are assembled to face each other so as to surround the circumference of the horizontal coil assembly. Tubular core 1
1 is arranged and formed. As a result, the coil assembly 20 can be manufactured in the same manufacturing process as the conventional coil assembly 2.

In this coil assembly 20, the depth D of each winding groove M of the horizontal coil bobbin 21 and the vertical coil bobbin 22 is selected according to the number of windings of the magnet wire 24 assigned to each winding groove M. As a result, the magnet wire 24 wound in each winding groove M is arranged closer to the glass surface of the cathode ray tube than in the conventional case.

That is, as shown in FIG. 2 which is a cross section of the conventional coil assembly 2 in comparison with FIG. 1, in the conventional coil assembly 2, each winding groove M is formed with a constant depth D. On the other hand, the horizontal coil H and the vertical coil V differ in the winding amount assigned to each winding groove M by selecting the winding amount of each winding groove M and forming a desired magnetic field distribution. Therefore, in the conventional deflection yoke, as shown by hatching, a useless space K is left in each winding groove M, and the horizontal coil H and the vertical coil V are arranged apart from the cathode ray tube by that much.

However, if the depth D of each winding groove M is selected in accordance with the number of windings of the magnet wire 24 assigned to each winding groove M as in this embodiment, such a wasteful space K is obtained. Therefore, the magnet wire 24 can be arranged closer to the cathode ray tube than in the conventional case, and the deflection sensitivity can be improved accordingly.

Further, in this embodiment, the horizontal coil bobbin 21 and the vertical coil bobbin 22 are formed such that the width W of the winding groove M1 is wider than that of the other winding grooves M in the winding groove M1 having a large winding amount. The outer peripheral dimension is reduced. As a result, in the vertical coil bobbin 22 arranged outside the horizontal coil bobbin 21, the inner peripheral dimension can be set small, and the vertical coil can be located closer to the cathode ray tube and the deflection sensitivity can be improved accordingly. Has been done.

The core 1 arranged outside the vertical coil
Also in No. 1, since the outer peripheral dimensions of the horizontal coil bobbin 21 and the vertical coil bobbin 22 are smaller, the overall shape can be downsized, and the deflection sensitivity is improved by being arranged closer to the cathode ray tube than that of the conventional one. It is made possible. By doing so, the entire shape of the deflection yoke can be downsized and the weight can be reduced accordingly.

In the above construction, the deflection yoke is assembled with the core after the magnet wire is wound around the horizontal coil bobbin 21 and the vertical coil bobbin 22 by section winding to form the horizontal coil and the vertical coil. The coil assembly 20 is formed,
The coil assembly 20 includes a front cover 3 and a back cover 4
Etc. are attached and formed (FIGS. 4 and 5).

In this horizontal coil and vertical coil,
The magnet wire 24 is wound so that the depth D is assigned to each of the selected winding grooves M in accordance with the required magnetic field distribution, so that the magnet wire 24 is closer to the cathode ray tube than a conventional deflection yoke. Are arranged in the same manner, and the deflection sensitivity is improved.

Regarding the winding groove M1 having a large amount of winding, the groove width W is enlarged so that the outer peripheral dimensions of the horizontal coil bobbin 21 and the vertical coil bobbin 22 are reduced accordingly, and the inner diameters of the vertical coil bobbin 22 and the core 11 are correspondingly formed. Since the outer diameter is small and the vertical coil and the core 11 are arranged closer to the cathode ray tube than the conventional deflection yoke, the deflection sensitivity is improved accordingly.

According to the above configuration, the depth D of each winding groove M is selected in accordance with the number of windings of the magnet wire 24 assigned to each winding groove M, whereby the magnet wire 24 of each winding groove M is selected. It can be arranged closer to the cathode ray tube than in the conventional case, and the deflection sensitivity can be improved accordingly.

For the winding groove M1 having a large amount of winding, the groove width W is enlarged, and the horizontal coil bobbin 21, the vertical coil bobbin 22, and the inner and outer diameters of the core 11 are made smaller by that amount, so that the conventional deflection yoke is obtained. In contrast to this, the vertical coil and the core 11 can be arranged closer to the cathode ray tube, and the deflection sensitivity can be improved accordingly.

(2) Second Embodiment FIG. 3 is a sectional view showing a coil assembly of a deflection yoke according to a second embodiment of the present invention in comparison with FIG. In this coil assembly 30, in the horizontal coil bobbin 31 and the vertical coil bobbin 32, the depth and cross-sectional shape of each winding groove are the winding amount of the magnet wire 24,
The predetermined depth and shape are selected according to the position of the winding groove and the starting position of the winding.

That is, in the section winding, the magnet wire 24 is hooked on the protrusions formed on the end surface on the funnel side and the end surface on the neck side and wound along the winding groove, and the magnet wire 24 has a small diameter. By using the litz wire in which the copper wires are twisted together, the magnet wire 24 is wound on one side surface of each winding groove in each winding groove. That is, a so-called winding behavior occurs. This winding curb reduces the wire area ratio of each winding groove, and in the horizontal coil and the vertical coil, the cross-sectional shape of each winding groove increases as compared with the winding amount. That is, the magnet wires 24 cannot be placed close to the cathode ray tube.

As a result, in this embodiment, in addition to the depth of each winding groove, the cross-sectional shape of each winding groove is selected so that the wire area ratio does not decrease due to winding curl. As a result, in this deflection yoke, the magnet wires 24 can be arranged closer to the cathode ray tube than in the conventional case, and the deflection sensitivity is improved accordingly.

According to the configuration shown in FIG. 3, the depth and the cross-sectional shape of each winding groove are selected to have a predetermined depth and shape according to the winding amount of the magnet wire 24, the position of the winding groove, and the like. The deflection sensitivity can be further improved as compared with the above embodiment.

(3) Other Embodiments In the above embodiments, the thickness of the coil bobbin is changed so that the depth of the winding groove can be changed according to the winding amount of the wire rod wound in each winding groove. Although the case of setting has been described, the present invention is not limited to this, and for example, a spacer or the like may be arranged in the winding groove to set the depth of the winding groove.

Further, in the above embodiment, the case where both the horizontal coil and the vertical coil are formed by section winding has been described, but the present invention is not limited to this, and either the horizontal coil or the vertical coil is formed by section winding. It can be widely applied when forming.

[0030]

As described above, according to the present invention, by setting the depth of the winding groove in accordance with the winding amount of the wire material wound in each winding groove, the dividing wire material is brought close to the cathode ray tube. It can be arranged to improve the deflection sensitivity.

[Brief description of drawings]

FIG. 1 is a sectional view showing a coil assembly applied to a deflection yoke according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a coil assembly applied to a conventional deflection yoke.

FIG. 3 is a sectional view showing a coil assembly according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing a conventional deflection yoke.

5 is a side view showing a coil assembly applied to the deflection yoke of FIG. 4. FIG.

[Explanation of symbols]

1 ... Deflection yoke, 2, 20, 30 ... Coil assembly, 8, 21, 31 ... Horizontal coil bobbin, 10, 2
2, 32 ... Vertical coil bobbin, 11 ... Core, 24 ...
… Magnet wire, M, M1… Winding groove

Claims (2)

[Claims] 1. A deflection yoke in which a wire rod is arranged along a winding groove formed inside a substantially funnel-shaped coil bobbin to form a horizontal coil and / or a vertical coil. The deflection yoke is characterized in that the depth of the winding groove is set according to the winding amount of the wire. 2. The deflection yoke according to claim 1, wherein the depth of the winding groove is set by the wall thickness of the coil bobbin.