JPS601730A - Deflecting coil - Google Patents

Abstract

PURPOSE:To enable an optimum required magnetic field to be stably generated while widening the extent of the operation of the magnetic field produced from a bend-up part and the neighbourhood thereof by dividing said part into plural portions to form new plural bend-up parts. CONSTITUTION:A bend-up part is divided into, for example, two portions, and, e.g., 80% of the number of coil winding is formed around the conventional bend- up part 6 and remaining 20% formed around the new bend-up part 7 provided at a position transferred from said bend-up part 6 to the head part 2 side. Hereby, the width of each of the bend-up parts is narrowed by fractions divided into two positions of the bend-up parts 6, 7 and the curvature of a curve transferring from a cone part 9 to the bend-up parts 6, 7 is reduced, so that the loosening of winding is reduced and stability is increased.

Description

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

Configuration of conventional example and its problems Among conventional deflection coils, the saddle-shaped coil has a saddle shape.
As shown in a side view in FIG. 1 and a perspective view in FIG. 2, both the neck portion 1 and the head portion 2 have a pend-up portion 3 at each location.

However, due to the characteristics of the coil, it is necessary to widen the width of the pend-up part 40, and when molding the coil with a mold etc., increasing this width will reduce the curvature of the curve 3 that moves from the cone part 5 to the pend-up part 4. Since this part is a bent part of the coil, it is difficult to adjust it when forming the coil, and the winding is likely to become slack. Therefore, when mass producing coils, the magnetic properties of this part and the winding There were large variations in stability. Especially the neck part 1,
Since the width of the pend-up portion 3 becomes wider, the winding slack tends to increase structurally as shown in FIG. Third
In the figure, 4 indicates loose winding.

OBJECTS OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a deflection coil that does not cause winding sag in the pend-up portion of the coil and has excellent magnetic properties.

Structure of the Invention The deflection coil of the present invention has a plurality of pend-up parts to reduce winding slack in this part and improve stability. The range of operation of the magnetic field generated from the pend-up section and the magnetic field generated near the pend-up section is expanded, and a more optimal required magnetic field can be stably created.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIGS. 4a and 4b are a perspective view and a side view of the vicinity of the neck part of a deflection yoke according to an embodiment of the present invention, in which the pend-up part is divided into two parts. For example, 80% of the coil turns are made with the conventional pend-up part 6, and the remaining 2 * lIk are made with a new pend-up part 7, which is located at a position moved from the pend-up part 6 to the head 2 side. Compared to the conventional pend-up portion 3 shown in FIGS. 1 and 3, which is separated into one place, the pend-up portions 6 and 7 are separated into two places.
Each width becomes narrower, and the curvature of the curve passing from the cone portion 9 to the pend-up portions 6, 7 becomes smaller, so that winding slack is reduced and stability is increased.

Furthermore, Fig. 5 shows a saddle-shaped coil made by providing a wire hook part 10 on the bobbin and winding the wire directly therein in order to omit coil forming after winding, but in this case, for ease of winding, The winding has very little slack in the pend-up part, and the linear density in the neck part is more uniform than that of a coil made of polyurethane, as shown in Figure 6, and the magnetic field changes significantly.
In this case as well, as shown in FIG. 7, for example, by creating the pend-up portion of the section portion 11 in FIG. 5 at a new position 12 moved toward the head side, the linear density of this portion is This results in a line distribution equivalent to that of the coil shown in FIG. 6. You will be able to obtain the same magnetic field as a coil made by coil molding.

Incidentally, in the embodiment described in -H, a plurality of pend-up portions were provided in the coil neck portion, but they may be provided in the coil head or both.

Effects of the Invention Second, as described above, the deflection coil of the present invention has a plurality of pend-up portions, thereby improving the magnetic properties of the coil and the stability of the winding.

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[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional saddle and coil, Fig. 2 is a perspective view thereof, Fig. 3 is a side view of the same essential parts, and Fig. 4a. b is a perspective view and a side view showing a deflection coil according to an embodiment of the present invention, FIG. 5 is a cross-sectional view of the neck portion of a coil made by providing a wire hook on a bobbin, and FIG. 6 is the same as FIG. 5. FIG. 7 is a cross-sectional view of a neck portion of a coil that has been wound in a distributed manner and then formed into a coil, and FIG. 7 is a side view of a main part showing a deflection coil in another embodiment of the present invention. 1...Neck part, 2...Head, 6,7
...Pend up section, 9...Cone section. Name of agent: Patent attorney Toshio Nakao and 1 other person
Section n dimension 霜d /-Q Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] A deflection coil characterized in that a bent-up portion of at least one of a neck portion and a head portion of the coil wound in a saddle shape has a plurality of winding portions.