JPS6347225B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for winding a saddle-type deflection coil.

As is well known, the electromagnetic deflection coil used to deflect the electron beam of a cathode ray tube for television is constructed by winding a wire between a female mold and a male mold mounted on a winding machine. . As shown in FIG. 1, the deflection coil 1 has a window 2, vertical conductor surface portions 3 and 4 on both sides of which extend in the tube axis direction along the tube wall of the cathode ray tube, and these are connected at both ends. cross conductor section 5,
It is equipped with 6.

Since it can be considered that the vertical conductor plane parts 3 and 4 generate the magnetic field that contributes to the deflection of the electron beam, if the conductor distribution in these parts can be obtained as designed, saddle-shaped deflection is possible. It becomes possible to significantly improve the winding yield of the coil 1.

However, in an actual winding machine, for example, a winding machine that winds the wire by rotating a mold, the wire is wound at a relatively high speed, and the tension is applied to each winding of the deflection coil 1 in the middle of the winding. Deflection coil 1
It is quite difficult to wind the wire as designed. In particular, as shown in FIG. 2 and FIG.
Point a is located at the deepest part of the male and female molds and is a narrow gap, so the wire cannot enter. If the wire is wound by rotating clockwise with respect to an axis perpendicular to the vertical direction, the wire will be stretched at the vertical conductor surface part 3, and conversely, the wire will become loose at the vertical conductor surface part 4, so the wire will not be wound properly. becomes.

For the above-mentioned reasons, the wire area ratio within the winding gap created by the mold becomes significantly poor. That is, as shown in FIGS. 2 and 3, the wire should originally be wound in the shape of a solid line, but due to the centrifugal force of the rotation of the mold, the wire is dispersed in the radial direction, and the inside of the coil is shaped like a dotted line 3b.
The shape is as shown in 4b. In addition, the winding density of the wire is high on the side of the winding gap wall of the female mold (outer mold), and the alignment of the wire on the vertical conductor surface of the deflection coil is relatively good. On the side of the winding gap wall surface of the mold (inner mold), a sawtooth-like unwinding gap is formed, and the linear density becomes extremely poor. Therefore, the vertical conducting wire surface portions 3 and 4 of the deflection coil 1 do not have a predetermined wire distribution, and a deflection magnetic field as designed cannot be obtained. In order to eliminate this drawback, conventionally, after forming a deep winding gap created by a mold and winding the wire a predetermined number of turns, the deflection coil is mechanically pushed in the direction of the deepest part with a push gauge using a strong force. is formed, but
Because it is difficult to apply pressure to the deepest part, the wire area ratio near the window 2 to the deflection coil is not improved, and the unwinding gap created in the winding gap is forced to be filled with wire, resulting in significant deformation of the winding wire. In addition, the wire arrangement may be such that, for example, winding wires that should be located inside the wire distribution locally protrude onto the coil surface or become intertwined with each other, disturbing the deflection magnetic field, and furthermore, the coil may be seriously damaged. For example, if you try to increase the line area ratio to 80% or more, approximately
50% of the deflection coils had defects such as poor withstand voltage, and in the end it was difficult to manufacture a deflection coil with the characteristics as designed.

In view of the above-mentioned drawbacks, the present invention provides a method for winding a saddle-shaped deflection coil, in which the yield of deflection coils is extremely high and a desired coil shape can be obtained.

Embodiments of the wire winding method of the present invention will be described in detail below with reference to the drawings. FIG. 4 is a plan view of a combination of male and female molds for winding a saddle-shaped deflection coil. 11,
12 are provided and combined. Winding gaps 9, 11
are the transverse conductor portion 5 of the deflection coil 1 shown in FIG.
6 is the part where the wire is wound, and the winding gap 10,1
2, the vertical conducting wire surface portions 3 and 4 of the deflection coil 1 are wound. A portion 13 surrounded by gaps 9 to 12 is a window piece forming a window 2 of the saddle-shaped coil 1. voids 9 and 11
In between, there is a window frame 1 across the gaps 10 and 12.
The slots 14, 15 are provided to a depth of up to 3 mm. The slots 14 and 15 are provided at both ends a and b of the gaps 10 and 12 in the window frame 13,
This is the position farthest from the window frame 13 when c and d are connected with a straight line.

FIG. 5 shows a cross section of the mating mold, in which straight-extending slots 14 and 15 form winding gaps 10 and 1.
2, and the wire reaches the deepest part 10a, 12a of the winding gap 10, 12 by being pushed by the push rods 17, 18 shown by dotted lines.
Filling is performed sequentially from 12a without any gaps. slot 1
The push rods 17 and 18 inserted into the slots 4 and 15 are made of a material such as Teflon, and have cross sections that conform to the shapes of the slots 14 and 15, such as circular 16, circular 17, and flat plate 18, as shown in FIG. It is made as it should be.
In addition, 16 is a mold attachment part.

The winding method of the present invention is performed by fixing the mold and rotating the winding guide. The mounting portion 16 of the mold is fixed to the base of the winding machine, and the male mold 7 is fixed to the female mold 8 in a conventional manner. Further, the winding auxiliary device and the like are used in the same manner as before. As shown by dotted lines in FIG. 5, the push rods 17 and 18 located outside the mold are arranged so that the winding guide 19 moves around the molds 7 and 8 in a plane perpendicular to the horizontal direction on the drawing. When it is rotated, that is, when it is rotated by a predetermined angle clockwise in FIG. 4, it repeatedly enters and exits the slots 14 and 15 alternately.

Now, if you start winding from position A in Figure 4,
When the wire is wound 90 degrees to position B, the winding guide 19 is stopped, and at the same time, the push rod 18 is inserted into the slot 15 to push and hold the wire to the deepest part 12a of the winding gap 12. In this state, the wire is wound 180 degrees to position D, the winding guide 19 is stopped, the push rod 17 is inserted into the slot 14, and the wire is moved to the deepest part 10a of the winding gap 10.
Push it in until the end and hold it there. Next, the winding guide 19 is rotated 90 degrees to position A and stopped, and the push rod 1
8 from slot 15. This completes the first winding. For the second winding, the winding guide 19 is rotated to position B and stopped, and at the same time the push rod 18 is inserted again into the slot 15 to hold the wire. The winding guide 19 is rotated 90 degrees to position C and stopped.
At the same time, the push rod 17 is pulled out from the slot 14. Next, the winding guide 19 is rotated 90 degrees to position D and stopped, and the push rod 17 is inserted into the slot 14 again to hold the wire in the deepest part 10a. Thereafter, the wire is wound to position A, and the second winding is completed. Thereafter, the winding operation is repeated in the same manner to form a deflection coil.

Winding gap 1 created by the mold by the above-mentioned winding wire
According to the shape of 0, 12, the deepest part 10a, 12
The wire rods are sequentially filled starting from a, and a high wire area ratio is obtained over the entire winding gap. Finally, the coil shape is fixed by energizing as before. Further, it may move slowly in the above-mentioned "stop" position.

The saddle-shaped deflection coil obtained by the above-mentioned winding method has a conductor distribution in the coil shape shown by the solid line in FIG. 2, which has the advantage of improving the symmetry of the magnetic field generated from the vertical conductor planes 3 and 4. There is. Furthermore, since the linear density near the window is improved, the deflection of the electron beam near the corner of the cathode ray tube screen can be obtained as designed, making it easier to focus multiple beams.

Furthermore, since it is possible to form a deflection coil with a special shape that cannot be obtained by conventional winding methods, it is possible to achieve accurate electron beam focusing in a cathode ray tube having multiple beams using only the deflection coil.
Furthermore, unlike conventional wire winding methods, there is less damage and elongation of the wire due to forcing the wire into the mold, and there is less damage and elongation of the deflection coil due to forced pressure forming after coil winding. It has the advantage of being less prone to voltage breakdown, deformation of the windings inside the coil, and even less damage to the mold.

According to the winding method of the present invention, there is very little damage to the deflection coil. For example, the withstand voltage failure, which accounted for about 99% of damage, is reduced to a few percent, so the yield of deflection coils is significantly improved, and Since there is no local disturbance in the position of the wire on the vertical conductor surface of the coil, the magnetic field characteristics are good, and since a high wire area ratio can be obtained, a deflection coil with good deflection efficiency can be obtained.

In the above embodiment, one slot is shown for one winding gap, but the number can be increased to three.
The location is based on the above-mentioned principle. In this case, the push rod may be moved in and out at the same time, or may be carried out sequentially as the winding guide moves.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the general shape of a saddle-type deflection coil, Fig. 2 is a sectional view taken along the dot-dashed line in Fig. 1, and Fig. 3 is a sectional view taken along the dot-dashed line in Fig. 1. , FIG. 4 is a plan view of a mold for explaining the wire winding method of the present invention, FIG. 5 is a sectional view taken along the dashed line - in FIG. 4, and FIG. 6 is a perspective view showing an embodiment of the push rod. It is a diagram. In the figure, 1 is a deflection coil, 2 is a window, 3 and 4 are vertical conductor surface parts, 5 and 6 are transverse conductor parts, 7 and 8 are molds,
9, 10, 11, 12 are winding gaps, 14, 15 are slots, 17, 18 are push rods, and 19 is a winding guide.

Claims (1)

[Claims] 1. In a method for winding a saddle-shaped deflection coil in which a wire is wound in a winding gap formed by combining two molds,
The mold is provided with a slot that traverses the winding gap corresponding to the vertical conductor surface of the deflection coil and reaches the deepest part of the winding gap, and the slot is provided in the mold for each half turn of the wire material to be wound in the winding gap. A method of winding a saddle-shaped deflection coil, characterized in that the wire is wound while being pushed toward the deepest part of the winding gap using a push rod inserted into a slot.