JPH11260259A - Deflection yoke manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflection yoke manufacturing device that is high in productivity by stabilizing the deflection yoke. SOLUTION: This deflection yoke manufacturing device is formed from a deflection coil winding die composed of a male die and a female die 2, which are detachably combined with each other. By forming splines 14, 15, 16, 17 at a female die head part which is formed from a guide part 7b having a coil forming curved surface 13, the female die head part is formed into a wave- shaped form and the contact resistance produced between a coil-forming member and the female die head part is reduced, so that unstable elements of the deflection coil are eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a deflection yoke used for a cathode ray tube of, for example, a television receiver.

[0002]

2. Description of the Related Art Conventionally, in a deflection yoke used for a cathode ray tube, a winding type of a saddle-type deflection coil has been used as a manufacturing apparatus for securing convergence characteristics.

Adjustment of the convergence characteristics of a deflection coil winding having a male type and a female type detachably connected to each other is performed by changing a joining portion and an inner piece provided on a female type neck to a male having a portion to be joined. This is performed by adjusting the gap between the curved surfaces of the three-dimensional shape facing each other which is generated by combining with the mold. In addition, by providing a correction air space where no winding is applied at a predetermined location of the deflection coil,
The convergence characteristics are being adjusted.

[0004]

However, in recent years,
With the increase in the screen size, high-speed scanning, and high-density display of cathode ray tubes that use this kind of deflection coil, the deflection performance required for the deflection yoke attached to them has become more severe, and the deflection yoke is configured. Deflection coils are also required to have strict characteristics and high productivity.

[0005] In such a background, when the coil is wound around a three-dimensional curved surface generated by joining a female type and a male type at the time of winding, the deflection coil winding form has a tension acting on the coil forming member. And the variation in the shape of the guides affect the convergence characteristics, cause unstable elements of the deflecting coil, and reduce the productivity.

Accordingly, an object of the present invention is to provide a deflection yoke manufacturing apparatus which stabilizes a deflection coil and has high productivity.

[0007]

In order to achieve the above object, the first means is constituted by a saddle-shaped winding coil for a deflection coil comprising a male type and a female type which are detachably connected to each other. In a deflection yoke manufacturing apparatus, a female head having a curved surface on which a coil is formed is formed into a wavy shape having splines.

In order to achieve the above object, a second means is the first means, wherein the deflection coil is a saddle-shaped horizontal coil.

In order to achieve the above object, a third means is the first means, wherein the deflection coil is a saddle-shaped vertical coil.

[0010] As shown in the first means, since the female head is corrugated, the contact area between the coil forming member and the female head is reduced, thereby reducing the contact resistance.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, a female head having a coil-formed curved surface is formed into a corrugated shape, so that the mechanical displacement of the deflection coil and the convergence characteristics vary, and furthermore, the same model can be used. Variations between windings are reduced. Therefore, the deflection coil can be stabilized,
It is possible to provide an apparatus for manufacturing a deflection yoke having a winding coil for a deflection coil which is excellent in productivity.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a deflection coil former as an apparatus for manufacturing a deflection yoke according to an embodiment of the present invention.

[0013] As shown in FIG.
A male type 1 and a female type 2 are detachably connected to each other.

The male mold 1 has a pin index mechanism 3 for providing a correction space where no winding is performed at predetermined locations of the deflection coil, and guides 4a and 4b for guiding the coil forming member into the inside of the winding mold. The pin index mechanism 3 and the guides 4 a and 4 b are fixed to one surface of the face plate 5.

The female mold 2 has a movable restricting piece 6 for regulating the shape of the inner window of the deflection coil, and guides 7a and 7b for guiding the coil forming member into the inside of the winding form.
The guides 7a and 7b are fixed to one surface of the face plate 8.

The female mold 2 has an inner piece 10 having a joint 9 formed therein. Male type 1 is inner type 10 of female type 2
To be joined (center pin 11, guide pin 1)
2) is projected and combined with the female mold 2 to form a three-dimensional curved surface between the two (the inner piece 10, the center pin 11, and the guide pin 12).

FIG. 2 is a perspective view of the female mold 2 shown in FIG. 1 with the face plate 8 removed. The shape of the female head (guide portion 7b) having the coil-formed curved surface 13 extends to the inside of a three-dimensional curved surface gap (not shown) generated by joining the female mold 2 and the male mold 1 during winding. It plays an important role in aligning and introducing the coil forming member.

That is, in order to reduce the contact resistance generated by the coil forming member and the female head (guide portion 7b) during winding, and to improve the slipperiness with the coil forming member, the female head (guide) is used. Waveform the shape of 7b),
By changing from surface contact to line contact, it is possible to improve the factor of the deflection coil unstable element. In this case, the curved surface of the female head (guide 7b) is defined (formed) in the following steps.

FIG. 3 is a sectional view taken along line AA of FIG. The forming surface extended from the coil forming curved surface 13 is defined by the coil reference position A and the coil forming amount T. The approximate spline raised at an angle θ1 with respect to the end surface of the coil forming surface is processed by the fillet R1 to create a spline 14 of the female side surface end surface.

FIG. 4 is a view of a main part in the B direction of FIG. A straight line rising at an angle of θ2 with respect to the end surface of the coil forming surface;
A straight line rising at an angle of θ3 with respect to the end surface of the spline 14 is processed by a fillet R2 to create n female side surface end surfaces and n splines 15 in a cross direction. The spline 14 and the splines 15 (n) and A curved surface is created by the spline 16 on the end surface of the molding surface.

Further, the curved surface is three-dimensionally offset,
After creating the offset curved surfaces, cut lines are created on these curved surfaces, and cut lines (not shown) of the curved surfaces and the offset curved surfaces are formed.
Are alternately approximated by splines, and a wavy spline 17 (see FIG. 2) is generated on the female side surface.

A three-dimensional curved surface is generated from the cut lines of the splines 15, 16, 17 and the offset curved surface, and a waveform shape of the female head (guide portion 7b) is formed.

According to the embodiment of the present invention, the female head having the coil-formed curved surface is formed into a corrugated shape,
When winding the coil forming member around a three-dimensional curved surface generated by joining the female mold 2 and the male mold 1 at the time of winding, unevenness in tension acting on the coil forming member can be reduced. Further, by digitizing the guide shape, it is possible to reduce variations in the mold shape. Therefore, it is possible to stabilize the deflection coil, and to provide a deflection coil former having excellent productivity.

[0024]

According to the present invention, a female head having a coil-formed curved surface is formed into a waveform, so that the mechanical displacement of the deflection coil and variation in convergence characteristics can be reduced.
Furthermore, variations between the winding forms in the same model are reduced.
Therefore, it is possible to stabilize the deflection coil, and it is possible to provide a deflection yoke manufacturing apparatus having a deflection coil winding form having excellent productivity.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a deflection coil winding form as a deflection yoke manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of the female type shown in FIG. 1 in a state where a face plate is removed.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a main part view in the B direction of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Male type 2 Female type 3 Pin index mechanism 4a, 4b Male type guide 5 Male type face plate 6 Movable restriction piece 7a, 7b Female type guide 8 Female type face plate 9 Joint 10 Inner piece 11 Center pin 12 Guide pin 13 Coil Formed surface 14, 15, 16, 17 Spline

Claims (3)

[Claims] An apparatus for manufacturing a deflection yoke comprising a saddle-shaped winding coil for a deflection coil comprising a male type and a female type detachably connected to each other, wherein a female type head having a coil forming curved surface is provided. A deflection yoke manufacturing apparatus, wherein the deflection yoke has a waveform having splines. 2. The deflection yoke manufacturing apparatus according to claim 1, wherein the deflection coil is a saddle-shaped horizontal coil. 3. An apparatus according to claim 1, wherein said deflection coil is a saddle-shaped vertical coil.