JPH0130249B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a deflection yoke device used in television receivers and the like.

Technical background of the invention and its problems In general, in the deflection yoke device of a color television receiver, the horizontal deflection coil is a coil winding, and the vertical deflection coil is a toroidal winding around a ferrite core divided into two. It is becoming. The horizontal deflection coil is arranged around the inner periphery of the coil separator, and the vertical deflection coil is arranged around the outer periphery of the coil separator. The winding distribution of the vertical deflection coil has a close relationship with various characteristics such as convergence characteristics and deflection distortion on the picture tube screen, so variations in the winding distribution deteriorate the screen quality of the television receiver. Leads to. Normally, as shown in FIG. 1, a vertical deflection coil is wound in sequence in a first layer a1 and a second layer a2, with a return wire portion b formed between each layer. This return wire part b is wound two to three turns as shown in FIG. 2, and forms a straight part that is inclined with respect to the straight part of the main winding forming the layer. Therefore, the main winding is further wound one after another on the return wire forming this inclined straight portion to form a layer. However, when the main winding is wound on an inclined wire, the main winding often slips, and since there are multiple such parts, the pitch of the main winding is disturbed, and there are many variations in the pitch of the main winding. A winding distribution with an ideal constant pitch winding cannot be obtained. This causes distortion of the vertical deflection magnetic field, misconvergence,
This is a major cause of deflection distortion. Note that d is a ferrite core.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a deflection yoke device in which each layer can easily form windings with a constant pitch, and the characteristics can be improved.

Summary of the Invention In this invention, the return wire passes only along the outer periphery of the main winding layer to eliminate variations in the winding layers wound thereon, and on the inner peripheral side of the ferrite core, the return wire passes only through the outer periphery of the main winding layer. The line is formed so as to be located in the center between adjacent lines of the previous layer.

Embodiment of the Invention An embodiment of the invention will be described below with reference to the drawings. In FIG. 3, d is one ferrite core obtained by dividing a substantially trapezoidal conical cylindrical ferrite core into two in the axial direction. The vertical deflection coil main winding e is toroidally wound around this ferrite core d, but the return wire f is routed around the outer periphery and is not routed to the inner periphery of the core for return purposes. . The return wire f is thus returned onto the main winding of each layer. By forming such a return wire f, the pitch disturbance of the main winding wound on the return wire to form a layer is eliminated, and the winding distribution is stabilized. Furthermore, regarding this device,
The following winding method is adopted as the winding method of the main winding e . That is, as shown in FIG. 4, the ferrite core d
The main winding e laminated on the inner peripheral side of the first layer a1
The wires of the second layer a2 are located in the center between the lines of the second layer a2, and the lines of the third layer a3 are located in the center between the lines of the second layer a2. This is the winding distribution. The portion where the electric wires are piled up is set with reference to the adjacent portion where the electric wires are most concentrated, that is, the electron gun side, which is the portion where the diameter of the ferrite core d is the smallest.

When winding in a stacked manner as described above, the winding distribution is set so as to satisfy various characteristics required of the deflection yoke, taking into consideration the following relational expressions. As shown in Figures 4 and 5, the radius of the minimum inner diameter part of the ferrite core on the electron gun side is rc (the diameter is φc),
The outer diameter of the wire is φw, the winding pitch is θp, the total number of turns is N, the winding angle of each layer is θ ₁ , θ ₂ , ... θn, and the number of layers is n. Furthermore, as is clear from FIG. 4, when wires are wound in a stacked manner, the centers of the wires in each layer are located on circular arcs drawn from the center of the ferrite core, as shown in FIG. 6. These are defined as r ₁ , r ₂ . . . rn- ₁ , rn as shown in FIGS. 6 and 7. 6th
The figures show the first of the main winding layers. FIG. 7 is the last of the layers.

The relationship between each of the above elements can be shown as follows.

Winding angle of each layer θ ₂ = θ ₁ −θp θ ₃ = θ ₂ −θp = θ ₁ −2θp θn = θ ₁ − (n−1) θp ...(1) Relationship between the number of turns and the winding angle The radius of the winding in each layer is r ₁ = rc−φw/2 ……(3) Next, when winding wire in a stacked manner, the following points need to be taken into account. In other words, as shown in Figure 6,
Conditions are required so that the line 1a ₁ and the line of the third layer a ₃ do not come into contact. For this purpose, the following formula should be satisfied.

In addition, for the final layer (Figure 7), the final layer an
The limit is the pitch (Qp) where adjacent wires touch. For this purpose, it is necessary to satisfy the following formula.

r nsinθp／2φw／2θp2sin ^-1 φw／2rn……(
6) For toroidally wound vertical deflection coils:
As winding specifications, the total number of windings N, winding angle θ ₁ , wire outer diameter φw, ferrite core inner diameter φc (radius rc), etc. are given according to required characteristics. Therefore, the winding pitch for winding wire in a stacked manner is determined by using the above formula: (Qn= _Q1- (n-1)θp...(1) It is determined by

r ₁ = rc−φw/2 …(3) rn=rn−1 cosθp/2−(φw−r _o-1 sinθp/2) (φw+r _o-1 sinθp/2) …(4), The tolerance of the outer diameter of the picture tube net can also be calculated.

Effects of the Invention According to the present device described above, the return winding is a quick return that returns only the outer periphery of each layer, so winding variations in the main winding do not occur, and winding with a stable constant pitch can be achieved. I can do it,
The magnetic field distribution is also stable. In addition, on the inner circumferential side of the ferrite core, the second and subsequent layers are wound so as to be located in the center between the adjacent lines of the previous layer and stacked in bales, so the above-mentioned formulas are applied to the design. This can contribute to obtaining easy and stable characteristics. Therefore, overall, it is an effective device for improving image quality.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams showing the winding state of a conventional vertical deflection coil, FIG. 3 is a plan view showing a winding structure showing an embodiment of the present invention, and FIG. Explanatory diagrams showing examples, Fig. 5, Fig. 6, Fig. 7
The figure is a design explanatory diagram of an embodiment of the present invention. d...Ferrite core, e ...Main winding, f...
return line.

Claims (1)

[Claims] 1. In a deflection yoke device in which a toroidal-wound vertical deflection coil is provided around the outer circumference of a coil separator and a crescent-shaped horizontal deflection coil is provided on the inner circumference, the vertical deflection coil is wound around a ferrite core divided into two in the axial direction. In this case, the return wire for the main winding is routed only along the outer periphery of the larger diameter side of each layer, and the layer formed on the inner side of the ferrite core has a structure in which the return wire for the main winding is routed only along the outer periphery of the large diameter side of each layer, and the layer formed on the inner side of the ferrite core has a structure in which the return wire for the main winding is routed only along the outer periphery of the large diameter side of each layer, and the layer formed on the inner side of the ferrite core is A deflection yoke device characterized in that it has a structure in which layers are successively formed at the center between adjacent lines.