JPS62274535A - Deflection yoke - Google Patents

Abstract

PURPOSE:To decrease resistance loss in comparison with the conventional case where a twisted wire assembly is used, by using an assembled wire, which is made by bundling strands having of each diameter of 0.1 to 0.30 mm in parallel and making them adhere, as conductors by which at least one of horizontal and vertical deflection coils is formed. CONSTITUTION:A plurality of strands 5, which are composed of conductors 3, insulating layers 4, and adhesive layers 7, are bundled in parallel and made to adhere so that an assembled wire 8 is formed. Manufacturing process of a deflection coil, in which this assembled wire 8 is used, is similar to the one in which a conventional twisted wire assembly is used. A deflection yoke provided with the deflecting coil formed in this way, having the same winding as the conventional one, reduces resistance loss because each strand 5 is shorter. And, fine wire structure of this yoke enables eddy-current loss to be lowered even if in high-frequency scanning. A temperature rise of the deflecting yoke can also be reduced.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a deflection yoke for a cathode ray tube that reduces temperature rise.

[Prior Art] Deflection yokes for high-resolution cathode ray tubes used in character displays, graphic display monitors, etc. as computer terminals tend to have higher horizontal deflection scanning frequencies in order to improve display performance. . The conventional horizontal deflection frequency is the TV deflection frequency of 15.75
However, with the increase in resolution, 64KH2
Or even higher frequencies have come to be used.

When the frequency of the deflection current flowing through the deflection yoke increases, the eddy current product and skin loss increase in the deflection coil, and the eddy current product and hysteresis loss increase in the deflection yoke core. These losses appear as heat generation in the deflection yoke itself, resulting in an increase in the temperature of the deflection yoke, which not only impairs reliability, but also causes misconvergence, mislanding, and raster distortion, which are fatal to display devices. There is also the risk of causing performance defects. Therefore, the deflection coil with a higher deflection frequency (generally a horizontal deflection coil) is made of a set stranded wire (so-called Litz wire) is often used for the conductor wire of the coil.

Figure 2 is a diagram showing this set of stranded wires (2), and the wire diameter is 173 to 1/2 of the conventional TV wire used as a deflection yoke at a pitch of 4.51 am to 8 cm. 4 diameter, that is, O,L 5rs-0,15ma+ wire (5
) are twisted together at a pitch of 4.5 mm to 8 mm, and by reducing the effective conductor width of the coil, it reduces the eddy radio wave loss that occurs inside the coil conductor. , (3) is a conductor.

(4) is an insulating layer.

[Problems to be solved by the invention] However, in such a stranded wire structure, each strand (5)
However, this is because they are twisted together in a spiral shape.

The conductor length of the coil becomes longer, and the DC resistance value becomes larger < f,
There was a problem that resistance loss increased.

In addition, the manufacturing process for the saddle-type coil, which is often used for the horizontal deflection coil shown in Figure 3, involves winding a conducting wire around a single-turn mold, and applying voltage to the spring and final ends of the wound conducting wire. In addition, it is common to perform fusion molding in which the adhesive layer is fused by passing an electric current and generating heat. This energizing operation not only causes the conductor to generate heat, but also causes each element to flow in the same direction through each conductor (3) of the set of stranded wires (2) wound around the winding die, as shown in Figure 4. It also acts to generate electromagnetic force FA, Fe that pulls the wires (5^) and (5el together. In this case, the saddle-shaped coil (1) shown in Fig. 5
At the tip (6) where the coil thickness is the thinnest, this attractive electromagnetic force is the most important requirement for integrally molding the coil.If this electromagnetic force is insufficient, this tip (8) is separated from other conductor bundles, which not only impairs its function as a deflection coil, but also deteriorates the yield in the manufacturing process.

However, since the conventionally used clustered stranded wire (2) has a stranded wire structure, the generated electromagnetic force F^, FB is weak, so separation of the conductor bundle easily occurs, resulting in a problem of poor manufacturing yield. Ta.

This invention was made in order to solve the problems that occur when using such conventional clustered stranded wires, and to obtain a deflection yoke that has low resistance loss and has good formability during coil manufacturing. With the goal.

[Means for Solving the Problems] A deflection yoke according to the present invention has a deflection coil formed by winding a collective wire in which a plurality of wires are bundled in parallel and bonded together.

[Function] Since the deflection yoke of the present invention is a bundled wire in which a plurality of wires are bundled almost in parallel, the conductor length when wound around a coil is shorter than that of a conventional bundled wire. Since the DC resistance value is reduced, resistance loss is reduced. Also,
Since each strand is substantially parallel, the electromagnetic force that attracts each set of wires acts efficiently during the energization fusing process performed after winding into a coil, thereby improving the yield when manufacturing the deflection coil.

[Embodiment of the Invention] FIG. 1 is a perspective cross-sectional view of an embodiment of the collective wire, which is the main part of the present invention, and shows a conductor (3), an insulating layer (4), and an adhesive layer (
A plurality of strands (5) composed of 7) are bundled in parallel and glued together to form a collective wire (8). The manufacturing process of the deflection coil using this stranded wire (8) is the same as that when using the conventional stranded stranded wire (2).

A deflection yoke equipped with a deflection coil formed in this way has a shorter length of each strand (5) than a conventional one using a set of stranded wires (2) even with the same number of turns, so resistance loss is reduced. Furthermore, due to the thin wire structure, eddy current loss can be kept low even during high frequency scanning, similar to when using conventional clustered stranded wires (2), reducing the temperature rise of the deflection yoke. can do.

Furthermore, since the assembled wires (8) are made by bundling the strands (5) in parallel, the electromagnetic force that acts between each of the assembled wires (8) becomes strong during energization and fusing in the deflection coil manufacturing process. Therefore, the conductor bundle is less likely to be separated, and the manufacturing yield is also improved.

[Effects of the Invention] As described above, the deflection yoke according to the present invention is equipped with a deflection coil using a bundled wire made by bundling a plurality of strands in parallel, so it is better than the conventional bundled stranded wire. Since the direct current resistance value of the coil itself can be made smaller than that of the coil, the resistance loss is reduced, and accordingly, the temperature rise of the deflection yoke can be reduced. Further, since the electromagnetic force acting between the conductive wires is strengthened in the forming process in the manufacturing process of the deflection coil, separation of the conductor bundles is reduced, which has the effect of improving manufacturing yield.

[Brief explanation of the drawing]

Fig. 1 is a perspective sectional view of a stranded wire which is the main part of this invention, Fig. 2 is a perspective sectional view of a conventional stranded stranded wire, Fig. 3 is a perspective view of a saddle-type coil, and Fig. 4 is a perspective view of a two-piece stranded coil. FIG. 5, which is an explanatory diagram of electromagnetic force generated between conductors, is a cross-sectional view of a saddle-type coil. (1)...saddle type coil, (3)...conductor, (4
)...Insulating layer, (5)...Element wire, (7)...Adhesive layer, (8)...Gathered wire. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] (1) The conductive wire forming at least one of the horizontal deflection coil and the vertical deflection coil is characterized by being made of a collective wire in which a plurality of wires with a conductor diameter of 0.1 mm to 0.30 mm are bundled in parallel and bonded. deflection yoke.