JPS5821163Y2 - high voltage coil - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high voltage coil that can be manufactured easily and compactly.

For example, in a conventional ignition coil used in an automobile ignition system, a coil 1 is wound in layers on a bobbin 3 with an interlayer insulating paper 2 interposed between each layer, as shown in FIG. The coil 1a is roughly wound to ensure surge resistance against the spark of the ignition plug.

Therefore, when winding a coil, it is necessary to roughly wind only the outermost layer of the coil, making the manufacturing process extremely complicated.

This invention solves the above problems, and its feature is that the surge absorption coil is made by printing a conductor in a spiral shape on an insulating substrate and is bonded to the insulating collar at the end of the bobbin. is connected to the end of the coil wound on the bobbin.

Hereinafter, the present invention will be explained according to the illustrated embodiment.
In the figures and FIG. 3, 12 is a cylindrical bobbin, which has insulating flanges 12a at both ends, and three insulating flanges 13 protruding between the insulating flanges 123 at approximately equal intervals in the axial direction. The bobbin 12 is divided into four sections in the axial direction.

14 is a primary coil, and 15 is a secondary coil, which are divided into the above-mentioned sections and are wound in layers on the bobbin 12 without interlayer insulating paper.

Reference numeral 16 denotes a surge absorption coil formed by printing a conductor 18 in a spiral shape like the grooves of a record on an insulating substrate 17, which is bonded to the outside of each insulating collar 12a, and is connected to the primary coil 14.
It is connected to the end of the volume.

According to the configuration of the above embodiment, the primary and secondary coils 14.
Since no interlayer insulating paper is interposed between each layer of coils 14 and 15, and the outermost layer is not wound roughly, it is only necessary to wind the coils 14 and 15 in a heavy manner on the bobbin 12, making manufacturing very easy. Become.

Furthermore, as shown in FIG. 1, when the interlayer insulating paper 2 is interposed between each layer of the coil 1, a certain amount of gap A is created between the coil 1 and the insulating collar 3a of the bobbin 3 due to the winding technology. ,
In the case of the above embodiment, since there is no interlayer insulating paper, the gap between the insulating collars 12a, 13 and the coils 14, 15 can be eliminated, and the surge absorbing coil 16 attached to the outside of the insulating collar 12a can be removed. Since the conductor 18 is printed in a spiral shape on the insulating substrate 17, it does not require a small amount of space, and therefore the whole can be made compact.

Moreover, it is possible to ensure the same anti-surge force as the conventional one.

That is, as shown in the graph of FIG. 4, which shows the relationship between the number of coil layers and the potential, the potential gradient in the layers other than the top layer is low. Sufficient insulation can be achieved by setting the layer to one section, and the insulation distance can be secured by the surge absorption coil 16 instead of the conventional rough winding of the outermost layer, and the surge voltage can be absorbed here.

Note that the primary and secondary coils 14 and 15 may be wound in batches instead of being wound in sections.

Further, in the above embodiment, one primary coil is attached to one bobbin 12.
Although the bobbin 12 is wound in two, the primary and secondary coils 14 and 15 may be separately wound on each bobbin 12.

In this case, if the surge absorbing coils 16 are attached to the outside of both insulating collars 12a at both ends of the bobbin 12 on the secondary coil 15 side, and these are connected to the ends of the windings of the secondary coil 15, the surge voltage can be suppressed more effectively. It is desirable that it can be absorbed into the body.

According to the present invention, a surge absorbing coil made by printing a conductor in a spiral shape on an insulating substrate is used, so it can absorb surge voltage, eliminating the need to wind the outermost coil roughly as in the conventional case, and This surge absorbing coil can be easily manufactured by simply printing a conductor in a spiral shape on an insulating substrate, making it much easier to manufacture than conventional ones.

Moreover, since the surge absorbing coil is bonded to the insulating collar at the end of the bobbin, there is no need for an increase in size, and the product can be manufactured as compactly as before.

[Brief explanation of drawings]

Fig. 1 is a front sectional view showing a conventional example, Fig. 2 is a front sectional view showing an embodiment of the present invention, Fig. 3 is a side view of the same main part, and Fig. 4 is a graph illustrating the operation. . 12...Bobbin, 12a...Insulating collar,
14...Primary coil, 15...Secondary coil, 16...Surge absorption coil, 17...
...Insulating substrate, 18...Conductor.

Claims (1)

[Scope of utility model registration request] A surge absorbing coil made by printing a conductor in a spiral shape on an insulating substrate is bonded to an insulating collar at the end of the bobbin, and this surge absorbing coil is connected to the end of the coil wound on the bobbin. high voltage coil.