KR820001375B1 - Multilayered deflection yoke - Google Patents

Abstract

A deflection yoke comprises at least two layers of conductor turns wound around the core. A return traverse conductor traverses the core from a finishing conductor turn of one of the layers to a starting conductor turn of the other layer At least three projections are located adjacent an outer surface of the core for providing pivot points for the return traverse conductor. A first projection is located near a starting conductor turn of one of the layers, a second projection is located near a finishing conductor turn, and a third projection is located between the first and second projections for preventing the return traverse conductor from protruding beyond a core end.

Description

Multilayer deflection yoke

1 is a diagram showing a conventional method of the retrace method in which the winding start of the next layer is started from the winding end of one layer.

2 is a view showing another iron core portion of the present invention.

3 and 4 show a deflection yoke structure embodying the present invention.

5 and 6 illustrate various types of projections according to the present invention.

The present invention relates to a deflection yoke of a television receiver.

In order to deflect the electron beam between the cathode rays of the television receiver, a deflection yoke composed of a vertical winding and a horizontal winding is provided around the neck of the cathode ray tube. In a saddle-shaped yoke, all coils forming the vertical and horizontal windings are made of a conventional saddle shape and placed in the middle of a suitable container-and-fix structure. In a fully troid type deflection yoke, both the horizontal winding and the vertical winding are generally hollow cylinders with one end widened, and are composed of a plurality of conductor windings wound on a toroidal core core of an investment material. In saddle tread (ST) or hybrid yokes, the horizontal winding consists of two saddle-shaped coils arranged in a nonmagnetic saddle-shaped machine, their coils being symmetrically arranged with respect to the horizontal side and face. Vertical windings typically consist of two coils, each coil wound on the upper half or lower half of the separate toroidal core. The fully wound back and down iron cores are arranged on the axis of the saddle-shaped container and each vertical coil is arranged symmetrically about the vertical axis and face.

When using the vertical toroidal part of a full-troid yoke and a hybrid yoke, the windings are wound around several layers so that they have a specific angle distribution so that they generate a deflection magnetic field to compensate for convergence errors such as coma aberrations. . For example, when winding the multilayer by a conventional indexed toroidal winding machine, it is preferable to return to the winding start position of the second layer or the next layer most quickly and directly from the winding end position of the first layer or the preceding layer.

In a preferred embodiment of the present invention, the deflection yoke consists of one iron core and at least two layers of winding wound in a trolead phase on the iron core. The return conductor crosses the iron core from one winding end to the other winding start position. At least three protrusions are arranged on the outer surface of the iron core to give the turning point of the return conductor. The first protrusion is located near one winding start position, the second protrusion is located near the winding end position of three layers, and the third protrusion is used to prevent the winding conductor from exiting the cross section of the iron core. It is arrange | positioned between a processus | protrusion and a 2nd processus | protrusion.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Various methods have been used to return the winding conductors from the end of each layer to the next layer. FIG. 1 shows the spiral retrace method used for each of the two vertical coil components 20a and 20b of the hybrid yoke. The same method can be used for complete toroidal yokes. The toroidal iron core is divided into two portions 21a and 21b each having a large radius portion 22a and 22b and a narrow radius portion 23a and 23b. Each coil structure is wound separately separately in the same way using a winding machine.

In this winding machine, the iron core 21a is fixed so that its long side is in the Y direction, that is, the vertical direction, and the fryer of the winding machine in which one end of the splice of the winding conductor is installed reaches the winding starting position 24a of the first layer of the winding. That is, it moves in the horizontal direction.

The fryer then starts winding the conductor upwards inside the iron core to form the first winding of the first layer, shown by the first inner winding 25a in FIG. 1, on the iron core portion 21a. This inner winding is an active winding that provides a deflection magnetic field when acted upon by the scanning current.

After the part 22a of the iron core part 21a, the fryer of the winding machine turns around the outside of the iron core part 21a and starts to wind downward. The fryer moves downward and at the same time moves to the left as shown by the arrows in FIG. 1 and comes to the winding start position 26a of the second active inner winding. When it reaches 26a, the fryer forms a first winding conductor 28a (not shown) on the outside of the iron core 21a. In the vertical coil structure 21b, the outer first return conductor corresponding to this is wound in FIG. It is shown as 28b.

The remaining inner windings are formed by moving the fliers again and again at various positions determined according to the particular winding distribution selected until the last inner winding 29a is formed. Thus, winding 29a is considered to be the final winding of the first layer. For the sake of simplicity, many inner windings and an outer retrace conductor are omitted in FIG. The foregoing has described specific winding and movement methods, but other conventional winding methods may be used. Although omitted in the above description, a conventional fixing method may be used to securely fix the first several windings to prevent the windings from moving.

When the formation of the winding of the first layer is finished, the fryer is at the winding end position 30a of the iron core portion 21a. The winding start position of the second layer is between the inner winding 27a and the next winding 32a as shown by 31a. For the vertical coil portion 21b, the corresponding winding end position of the first layer is position 30b and the winding start position of the second layer is position 31b. In the spiral recursion method, the fryer continuously moves in the opposite direction to the previous one at the same time as the conductor is applied to the inner and outer sides of the iron core. That is, the fryer turns to the right until it reaches the starting position 31a of the second layer. During this retracement movement, the fryer places retrace conductors on the inside and outside sides of the iron core. Here, the return conductor refers to a conductor crossing from the winding end of one layer to the winding start of another layer. The retrace conductor of the vertical coil conductor 20a is shown by the inner winding 33a, 34a and the outer winding 35a, 36a, 37a (not shown in FIG. 1). The conductors corresponding to the vertical coil structure 20b are outer windings 35b, 36b, 37b and inner windings 33b, 34b (not shown).

As shown in FIG. 1, both the windings inside and outside the retrace conductor are cross windings. That is, the formation direction has a considerable angle with the rectangular direction of the active inner winding conductor of the first layer. From a value such as the diameter of the conductor or the dimensions of the large and small portions of the core, the maximum angle to the lengthwise direction in which the cross-return conductor can be arranged so as not to deviate from its fixed position is determined. Form two or three windings inclined about 140 degrees along the inside and outside of the portion.

The spiral rewinding method has a drawback that the retrace is fast, but it is necessary to form a cross winding on the inner active surface in the iron core. Precise disposition of the inner windings of the second layer, i.e., the next layer, is difficult because the windings are formed on the cross retrace conductor. In addition, the spiral rewinding arrangement significantly reduces the sensitivity of the inner windings of the first several layers. Since the next layer must be formed on the retrace conductor, each layer projects back into the inner space of the iron core. Therefore, in order to prevent contact with the cathode tube outer cycle, the vessels of the iron core and the yoke must be designed so that the first several layers are separated more than necessary from the electron beam therein according to the cathode tube outer cycle. Since the sensitivity of the windings of the first several layers is lowered, a larger amount of scan current is required for windings and coils to obtain a deflection magnetic field of moderate strength.

In order to remove this inner cross conductor, the retrace movement may be performed according to another conventional method, for example, a fried bag method. In this case, instead of continuously moving the fryer to the winding start position during retrace movement, the fryer is stopped periodically at a predetermined position. By forming a space in the inner winding between forming the preceding layer in the forward movement, the inner winding disappears at the predetermined position. When returning to one of the positions during the retraction movement, the fryer is stopped, the inner winding is formed in the longitudinal axis direction, and then the winding is moved to another longitudinal axis direction according to the outer surface of the iron core until it reaches another spatial position. Form. Repeat this sequence until you reach the beginning of the next cold.

Using the flyback method, only the outer conductor is the replacement conductor and the inner conductor is actually part of the active inner winding of the preceding layer, not the winding with the above drawbacks.

When crossing the iron core over 140 degrees, 7 to 8 flyback type rewinders are required. Therefore, when the fryer moves to a space position and forms an inner winding on it, the fryer must slow down or stop relatively frequently. This stop increases the time required for the formation of the windings of the first layer, and increases the time for winding up the multilayer core part.

In addition, it was found that the signal voltage of the horizontal frequency induced by the magnetic flux generated by the current flowing through the horizontal winding is increased in the inner return conductor formed during the return movement. Therefore, it is desirable to reduce the inner winding for the winding as small as possible in order to make all the amplitudes of the signal voltage as small as possible.

According to this invention, the deflection yoke is shown in FIGS. 2 to 4 to make the signal voltage very small and to quickly return to the start position of winding of the next layer.

As shown in FIG. 2, a non-magnetic plastic portion 101 is provided on the outer circumferential surface of the large diameter 102 of the iron core portion 103 in which the other end 117 has a small radius. The non-magnetic plastic portion 101 is provided with protrusions 104-106. The projection 104 is disposed at a winding winding winding start position of one layer, the projection 105 is at the winding end position, and the intermediate projection 106 is disposed between the projections 104 and 105 as described below. Each is arranged.

As shown in FIG. 3, the winding of the first layer starts at the normal winding start position 107 and continues to the left of the projection 105 at the winding end position 108. The starting position of the winding of the second layer is shown at 109. A feature of the present invention is the use of the projections 10 to 106 to allow the retrace conductor 110 to quickly and directly return to position 109 according to the outer surface of the iron core portion on the retrace conductor on the outer face wound forward. Is in.

The fryer winds down a certain distance after reaching the winding end position 108 and then moves backward to the winding starting position 109 of the second layer. As shown in FIG. 3, the projection 105 becomes a turning point of the retrace conductor 110 and rotates the conductor in the direction of the shortest distance between the projections 105 and 103. Thus, the conductor generally extends perpendicular to the longitudinal axis of the iron core portion 103. The protrusions 104 disposed near the winding start positions of the winding conductors of the first and second layers act as turning points for the retrace conductor 110 so as to be turned in these longitudinal directions to reach the winding start 119. .

The intermediate protrusion 106 acts as an intermediate turning point for the retrace conductor 110 to prevent the conductor from exiting the larger radius 102 or obstruct the winding of the next layer. The correct position of the protrusion 106 depends on the curvature of the large radius 102, the diameter of the conductor to be used, and the like. In the case where the large radius portion 102 is relatively curved, the intermediate protrusion 106 is closer to the projection 104 than the gentle curve and the projection ( 105) away from each other. However, if the intermediate projection 106 is too close to the projection 104, the portion 100a existing between the projection 104 and 106 of the retrace conductor 110 must be turned upward at an angle exceeding the possible degree. .

As shown in FIG. 4, a multilayer structure is also possible by using an iron core portion constructed in accordance with the present invention. The winding end position of this first layer is shown at 108. The first retrace conductor 110 reverts according to the projection 105 and then turns the projection 106, and finally reverts according to the projection 104 to be the winding start position of the second layer. The second layer is wound until the winding end position 111 is reached. The retrace conductor 112 turns the projections 104 to 106 to the winding start position of the third layer. The winding end position of the third layer is the left position 113 of the projection 105.

In such a configuration, it is preferable to provide the fourth projection 114 near the projection 105 on the strip-shaped portion 101. Moreover, if the protrusion 105 is arrange | positioned inside the winding end position of a suitable charging part, only this protrusion 105 can also be used. The retrace conductor 118 again turns the protrusions 104 to 106 to the winding start position of the fourth layer.

The layer may be added in the same manner as described above. In the example of FIG. 3 and FIG. 4, although the winding start position and the winding end position are set very plainly, in actuality, it differs from drawing according to the position and the winding arrangement of a required. For this reason, many longitudinal conductors are omitted.

The protruding length that each projection should protrude from the iron core 103 depends on the number of layers, the number of return conductors, and the distance from the iron core until the fryers near each projection. The thickness of each projection depends on its length and the force exerted by each of the projections as the winding conductor revolves around the projection.

When the tip of each projection is pointed by the inclined surfaces 115 and 116 as illustrated by the projection 106 of FIG. 5, when the outer noble conductor in the longitudinal direction is formed near the projection by the fryer, this is It does not stop at the tip of the protrusion and slides on either side. Since the slipped outer retractable conductor is deviated laterally, it should be made as thin as possible so as not to be inclined too much with respect to the longitudinal direction as described above. If precise placement is required, the thickness of the projections should be, for example, two to three times less than the diameter of the winding conductor.

Other projections, such as projecting pins of appropriate thickness, may be used. Instead of the general spherical protrusions, spherical protrusions such as the protrusion 104 of FIG. 6 may be used. It is also possible to install a projection of a suitable type on the iron core itself.

One feature of the present invention is preferred for the reason of arranging at least three projections in the large portion 12 of the radius of the iron core portion 13. In this part, the fryer is closer to the iron core than in the part position where the radius of the iron core is small, so that shorter and thinner protrusions can be used.

Further, the degree of freedom in arranging the projections in the portion 117 having a small radius increases. As shown in Fig. 3, the winding start position 109 can be placed in the groove between the two windings formed before. Since the angle that the retrace conductor portion 110b makes with the longitudinal axis is small, the conductor portion 110b does not easily escape from the exact position of the position 109, and the turning force applied to the projection is also small. In order to prevent the conducting wires from escaping the grooves, when the conducting wires (23) to (25) are used, the angle formed with the longitudinal axis is preferably set to (15) to (20) degrees or less.

In addition, the upper layer portion of the outer retrace conductor in the longitudinal direction is inflated outward and laterally in the vicinity of the projection. For example, when the conductors wound around the protrusions 104 are installed in the vicinity of the small portion 117 with a relatively high radius of the conductors, the returned conductors are displaced more than necessary at the ends thereof, so that the returned conductors are placed at the required positions of the ends 117. It is difficult to correctly position and correctly form the next inner active winding.

Claims (1)

A deflection yoke comprising an iron core, at least two windings wound on the iron core, and a return conductor crossing the iron core from the winding end position of one winding of the first and second layers to the winding start position of the other winding. At least three protrusions disposed adjacent an outer surface of the iron core to provide a turn point of the retrace conductor; That is, the first projection disposed in the vicinity of the winding start position of at least one winding of the first layer and the second layer; A second projection disposed near a winding end position of at least one winding of the first layer and the second layer; And a third projection disposed between the first projection and the second projection to prevent the return conductor from exiting the end of the iron core.

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