JPS5821166Y2 - choke coil - Google Patents

Description

[Detailed description of the invention] This invention involves winding one of the moving magnetic cores divided into a plurality of pieces, collecting the divided magnetic cores to form a closed magnetic circuit core, and winding the magnetic core over this magnetic core. This is a choke coil that is wound and fixed with the same wire as the wire, and the entire surface is covered with a synthetic resin insulation film.

A choke coil is made by wrapping an electric wire around a ferrite ring-shaped or mouth-shaped magnetic core and wrapping it with an insulating material.

Conventionally, these choke coils with ring-shaped or mouth-shaped magnetic cores take time to wind and are difficult to automate.

In addition, it is easy to wind wires in magnetic cores that combine a ring-shaped magnetic core divided into arc shapes, or a combination of U-shaped and single-shaped magnetic cores, but tapes and adhesives are required to assemble the magnetic core. It took time to fix the parts, and assembly metal fittings such as leaf springs with claws at the tips were used.

The present invention relates to a choke coil in which at least one of the divided magnetic cores is wound, the magnetic core is combined with another magnetic core to form a closed magnetic path, and the magnetic core is wound and fixed with the same wire as the winding.

As shown in FIG. 1, an electric wire is wound around the lower side of the U-shaped magnetic core 1 to form a winding 3, and both ends of the winding 3 are used as lead wires 4 to connect to other parts.

Furthermore, a single-shaped magnetic core 2 with a groove 6 bored on one side of the magnetic core is butted against both end surfaces of the U-shaped magnetic core, and the winding 3 is passed through the groove 6 of the I-shaped magnetic core from above, and both magnetic cores are wound. A choke coil is assembled by winding and tightening a tightening wire 5 which has the same wire as wire 3 several times.

Normally, wires wound as coils have a diameter of 0.4 to 0.8 mm, so even in the case of wires with a diameter of 0.4 mm, there is no need to wrap both ends of the tying wire 5 together, and leave it wound. Therefore, the tightening line 5 will not come loose.

FIG. 2 shows another embodiment of the present invention, in which an elastic body 7 such as a rubber plate is tightly fitted onto the I-shaped magnetic core 2 without providing the groove 6 of the I-shaped magnetic core 2 in FIG. 1. When the tying wire 5 is wound on top of the tying wire 5, the tying wire 5 will not loosen due to the elasticity of the rubber.

Figure 3 shows an arc-shaped magnetic core 8 in which a ring-shaped magnetic core is divided into circular arcs.
A choke coil is shown in which grooves 6 are provided on the outer circumferential surface of the choke coil to prevent the tightening wire 5 from coming off the magnetic core.

No matter which type of magnetic core is used as described above, the choke coil, which is assembled by winding the divided magnetic core and wrapping it with the tightening wire 5 as described above, is further coated with an insulating coating on the entire surface.

When painting, the coil may be held by the lead wires 4 at both ends of the coil winding.

Since the choke coil of the present invention described above has a divided magnetic core, the work of winding the coil is easy, and when assembling and fixing it, it is only necessary to tighten it with the same material as the wire used for winding, and there is no need for adhesive. There is an advantage that the choke coil can be manufactured efficiently and at low cost by eliminating the time required for the adhesive to set.

[Brief explanation of the drawing]

1 and 2 are perspective views of a choke coil using a rectangular magnetic core of the present invention, and FIG. 3 is a perspective view of a choke coil using a ring-shaped magnetic core of the present invention. In the figure: 1...U-shaped magnetic core, 2...
・I-shaped magnetic core, 3... Winding wire, 4... Leading wire, 5... Closing line, 6... Groove, 7... ... Elastic body, 8... Arc-shaped magnetic core.

Claims (1)

[Scope of utility model registration request] After winding at least one of the plurality of divided magnetic cores, each of the magnetic cores is assembled to form a closed magnetic circuit, the top of which is closed with the same wire as the winding, and then a synthetic resin insulating film is applied to the whole. A choke coil.