JPH0831376B2 - Small winding device with parallel double-wire coil - Google Patents

Description

Description: “Industrial field of application” The present invention relates to a small winding device such as a transformer or a choke coil, which is used for electric and communication devices.

"Prior Art" A small transformer, which has been widely known in the past, has a double-winding coil wire wound in parallel. In this transformer, a plurality of thin coil wires are wound in parallel instead of a thick wire, which is advantageous because the skin effect at high frequencies can be reduced.

FIG. 8 shows the winding process of the transformer. In this figure, 1 is a bobbin, which has flanges 1b and 1c at both ends of a rectangular tube-shaped winding portion 1a, and each terminal pin 2 is provided on a thick portion formed on one side of the flanges 1b and 1c. It is planted and fixed. A core made of a ferrite material is installed inside the winding portion 1a of the bobbin 1.

As shown in the figure, in this type of transformer, a plurality of coil wires 3, for example, four coil wires 3 are bundled and entangled in the terminal pins 2a, and then the coil wires 3 are arranged in strips to form a winding part. It is wound around 1a, and after a predetermined number of windings are completed, these coil wires 3 are bundled and entangled to the other terminal pins 2b, and after this entanglement, each coil wire 3 is cut together.

Although the coil wire 3 is a covered wire, the four coil wires 3 are electrically connected at the soldered portion by soldering the portions entwined with the terminal pins 2a and 2b, and therefore the coil wire 3 is shown in FIG. As described above, each coil wire is formed as a multi-wire coil in which the coil wires are connected in parallel.

Such a double-wire coil is often wound as a low-voltage side coil, and in general, the thick wire that is to be wound as the low-voltage side coil is a thin coil wire as described above. The sum of the cross-sectional areas of each is equal to the cross-sectional area of the thick line described above.

In the above example, the four coil wires are double-wire coils,
There is a transformer in which eight coil wires are wound in the same manner as above.

Further, although the bobbin 1 described above is equipped with a high voltage side coil, there is also one in which a plurality of low voltage side coils or high voltage side coils as described above are provided.

[Problems to be Solved by the Invention] As described above, a plurality of coils is a relationship in which many coil wires such as four or eight are arranged in a strip shape and wound. The work efficiency is extremely low.

In the case of a multi-wire coil, the coil wires are bundled and twisted to the terminal pins, soldered and then the lead-out portion is cut.
This cutting must be done using a separate instrument,
Moreover, if a plurality of coil wires are bundled and twisted on the terminal pin, an excessive force may be applied to the terminal pin, and the terminal pin may fall sideways or come out.

Further, the coil wire 3 advances the winding pitch from one flange 1b to the other flange 1c to form the first layer, and the terminal pin 2b
After winding, the winding pitch is advanced in the opposite direction to the above to form the second layer on the first layer. In this case, the coil wire 3 is wound in the same winding direction. When the wire is wound, the coil wire of the second layer jumps over the coil wire of the first layer, and thus the coil diameter in the winding direction becomes large.

"Means for Solving Problems" The present invention was developed in view of the above-mentioned problems, and a first terminal pin is provided on one side of a component part constituting a winding device and a second terminal is provided on the other side. In a small winding device having a terminal pin of, and a coil wound around a component body is electrically connected to the first and second terminal pins, the coil is fixed to the first terminal pin. While advancing the winding pitch while winding one coiled wire wound in one direction, it is fixed to the second terminal pin and then wound in the other direction without cutting the coiled wire. A small winding device provided with a plurality of parallel coils in which winding is formed by changing the winding direction and the winding pitch advancing direction by advancing the winding pitch in a direction and being fixed to the first terminal pin. suggest.

[Operation] In the above-described present invention, one coil wire fixed to the first terminal pin is wound in one direction from one side of the component such as the iron core or the bobbin toward the other side to change the winding pitch. Proceed,
Then, the coil wire fixed to the second terminal pin is wound so as to be wound in the opposite direction to the one side from the other side of the component without cutting. In this way, one reciprocal winding forms two plural coils, and two reciprocal windings results in four multi-line coils. Therefore, the number of reciprocating windings may be determined according to the required number of coil wires of the multi-wire coil.

Further, since the coil fixed to the terminal pin is a single coil wire made of a thin wire, it can be easily cut by applying a pulling force to the coil wire. Moreover, since the coil wire wound in the return path is wound in the opposite direction to the coil wire wound in the outward path, the coil wire in the winding direction does not jump over the coil wire in the outward path. Is reduced. Since the double-wire coil formed as described above is a work for winding one thin coil wire, automatic winding by the winding machine is sufficiently possible.

[Examples] Next, examples of the present invention will be described with reference to the drawings.

1 and 2 show a winding process in which a double-wire coil is provided on the same bobbin 1 as in the conventional example.

As shown in this figure, one coil wire 4 is wound around the terminal pin 2a and then wound around the winding portion 1a. In this embodiment, as shown in FIG. Tsuba turning
Wind the wire by advancing the winding pitch from 1b to the collar 1c.

Then, the coil wire 4 wound up to the inner wall of the collar 1c is twisted to the terminal pin 2b.

Next, the coil wire 4 entwined with the terminal pin 2b is continuously wound without cutting, but in this case, the second wire
As shown in the figure, while rotating in the counterclockwise direction, the collar 1c to the collar 1b
Advance the winding pitch toward. Then, the coil wire 4 wound up to the inner wall of the collar 1b is wound around the terminal pin 2a near the winding start.

When forming a multi-wire coil in which two thin wires are connected in parallel, the coil wire 4 is cut near the barbed portion of the terminal pin 2a at the stage when the above winding work is completed, and the terminal pin 2a, 2b Solder the barbs. When further winding is performed after the above-mentioned winding work, the coil wire 4 is wound in the clockwise direction without being cut after being twisted to the terminal pin 2a, and the collars 1b to 1c are similarly wound as described above. After advancing the winding pitch toward the terminal pin 2b and winding the wire toward the terminal pin 2b, winding is performed from the collar 1c toward the flange 1b while winding in the counterclockwise direction in the same manner as described above, and is twisted to the terminal pin 2a.

By this winding work, a multi-line coil in which four coils are connected in parallel is formed.

Thus, depending on the number of windings of the forward winding, which advances the winding pitch from the collar 1b to the collar 1c, and conversely, the winding pitch, which advances the winding pitch from the collar 1c to the collar 1b, an arbitrary number of multi-wire coils can be formed. Can be formed.

FIG. 3 is a development view of a multi-line coil formed by four coil wires, and the coil wire 4 serving as the first layer and the third layer 4
A and 4c are wound as shown by arrow 5 and the winding pitch is as shown by arrow 6, and the coil wire is the second layer and the fourth layer.
4b and 4d are wound as shown by arrow 7, and the winding pitch is as shown by arrow 8.

FIG. 4 is a partial simplified view of the double-wire coil formed as described above. As can be seen from this figure, the coil wire 4a wound along the forward path and the coil wire 4b wound along the return path are shown. Is wound in the opposite winding direction, so that the wound coil wire 4b does not jump over the coil wire 4a in the lower layer and is wound so as to be securely fitted between the respective winding wires in the lower layer. Therefore, by winding the forward winding at a predetermined interval, the winding of the backward winding is wound between the windings of the forward winding, and the forward winding and the backward winding may be further formed as shown in FIG. It is possible.

The arrows 5 and 7 in the drawing indicate the winding direction, and the arrows 6 and 8 indicate the direction in which the winding pitch advances.

FIG. 5 shows a conventional example in which the forward winding and the backward winding are wound in the same direction. As shown in this figure, the coil wire 10 wound according to the return path is the coil wire 9 wound according to the forward path.
Jump over every time you wind. From this, the coil diameter increases in the winding direction as the number of coil layers increases.

FIG. 7 shows an embodiment of partial winding, in which the coil wire 11 forming the lower layer is used as the forward winding and the coil wire 12 forming the upper layer is used as the return winding and is wound in the opposite direction to the coil wire of the lower layer. .

Although the small-diameter transformer has been described in the above-described embodiments, the same can be applied to a winding device such as a choke coil.

Further, it may be configured as a transformer equipped with a plurality of the above-mentioned multiple wire coils, and can be implemented as a winding device for directly winding the multiple wire coils on an iron core. The iron core is EE
An arbitrary shape such as a shape or an E-I shape can be used, and the bobbin shape can be changed as necessary.

[Advantages of the Invention] As described above, in the small-sized winding device according to the present invention, by winding a single thin wire, a parallel-connected double-wire coil is formed, and a coil wire wound in accordance with the forward path is formed. Since it is wound by an automatic winding machine so that it winds according to the return path without cutting, the winding efficiency is good, and for the coil end, the coil wire should be cut off from the twisted part of the terminal pin. Since it is possible to perform winding by an automatic winding machine, the production efficiency of this type of winding device is extremely high.

In addition, since the coil wire in the upper layer of the double-wire coil does not jump over the coil wire in the lower layer, the coil diameter in the winding direction is reduced, which is advantageous.

[Brief description of drawings]

1 and 2 are perspective views showing a winding process of a small transformer according to an embodiment of the present invention, FIG. 3 is a simplified view showing a state in which a multi-wire coil is developed, and FIG. 4 is winding of the multi-wire coil. FIG. 5 is a partial view showing a wire state, FIG. 5 is a partial view showing a conventional aligned winding row, and FIG. 6 is a bobbin cross-sectional view showing an embodiment in which a multi-line coil composed of two coil wires is formed. Is a bobbin sectional view showing a partially wound double-wire coil, FIG. 8 is a perspective view of a small transformer showing a winding process of the double-wire coil shown as a conventional example, and FIG. 9 is a simplified diagram showing a conventional double-wire coil. 1 ...... bobbin 2 ...... terminal pin 4 ...... coil wire 4a-4d ...... coil wire 5, 7 ...... winding direction 6, 8 ...... winding winding pitch direction 11, 12 ...... coil wire

Claims (1)

[Claims] 1. A first part on one side of a component body constituting a winding device.
And a second winding terminal pin on the other side, and a coil wound around a component is electrically connected to the first and second terminal pins. In, the one coil wire fastened to the first terminal pin is wound in one direction while advancing the winding pitch and fastened to the second terminal pin, and subsequently, without cutting the coil wire. While winding in the other direction, the winding pitch is advanced in the opposite direction to the above, and the winding is formed in parallel by changing the winding direction and the winding pitch advancing direction so as to be fixed to the first terminal pin. A small winding device equipped with a double wire coil.