TWI484512B - Method of making a coil - Google Patents

Description

Coil manufacturing method

The invention relates to a method for making a coil.

In the conventional wireless charging technology, the coil is generally wound by a single or multiple strands of enamelled copper wire, which is bulky, has poor stability, high cost, and is not easy to manufacture.

In view of this, it is necessary to provide a method for manufacturing a coil which is low in cost and easy to manufacture.

A method for manufacturing a coil, comprising: providing a metal foil strip, the metal foil strip comprising a carrier strip and a metal foil removably attached to the surface of the carrier strip, the metal foil surface being provided with a glue coating area, the coating a plurality of intervals are arranged between the glue zones; a carrier plate made of an insulating material is provided; and the metal foil is peeled off from the carrier strip, and the metal foil is adhered to the carrier plate according to the shape of the coil required, and the metal foil is folded at intervals Form the corners of the coil.

Compared with the prior art, the coil of the present invention is formed by connecting a plurality of metal foil monomers, which is low in cost and convenient to manufacture.

100,200‧‧‧metal foil strip

101, 201‧‧‧

10, 30‧‧‧metal foil monomer

10a, 30a‧‧‧Folding monomer

12, 31‧‧‧ metal foil

14‧‧‧ side

32‧‧‧ positive

34‧‧‧Back

140, 340, 212‧‧ ‧ intervals

142, 342, 214‧‧·Glue area

20‧‧‧ Carrier Board

1, 2‧‧‧ coil

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of a first preferred embodiment of a metal foil strip of the present invention comprising a plurality of metal foil monomers.

Figure 2 is a side elevational view of the metal foil unit of Figure 1.

Figure 3 is a schematic view of the metal foil unit of Figure 1 after the first folding.

Figure 4 is a schematic view showing the metal foil unit of Figure 3 being folded again.

Figure 5 is a schematic illustration of a coil made using the metal foil unit of Figure 1.

Figure 6 is a schematic illustration of another embodiment of a metal foil monomer.

Figure 7 is a schematic view showing the folding of the metal foil of Figure 6.

Figure 8 is a schematic illustration of a coil made using the metal foil of Figure 6.

Figure 9 is a schematic illustration of a second preferred embodiment of the metal foil strip of the present invention.

Referring to FIG. 1, in a first preferred embodiment of the present invention, a metal foil strip 100 includes a carrier strip 101 and a plurality of metal foil units 10 continuously attached to the surface of the carrier strip 101. The carrier strip 101 is oriented upward. One side of the metal foil unit 10 is provided with a release layer, and in use, the metal foil unit 10 can be directly removed from the release layer.

Referring to FIG. 2 , the metal foil unit 10 includes a metal foil 12 and two glue coating regions 142 disposed at two ends of a side surface 14 of the metal foil 12 . A gap 140 is disposed between the two rubber coating regions 142 . The glue application zone 142 is coated with a conductive paste.

Referring to FIG. 3 to FIG. 5, when the coil is fabricated, the plurality of metal foil monomers 10 are peeled off from the metal foil strip 100, and the two rubberized regions 142 of some of the metal foil monomers 10 are folded at 90 degrees at intervals 140. The two glue-coated regions 142 are respectively formed in the plane formed by the metal foil unit 10 On the side (such as the front side and the rear side of the plane in which the metal foil unit 10 is located), one of the glue application areas 142 is folded back again and upward so that the two glue application areas 142 are located in the same plane formed by the metal foil unit 10. The side (such as the rear side of the plane in which the metal foil unit 10 is located) is formed and a substantially L-shaped metal foil folding unit 10a (shown in Fig. 4) is formed. One side of the metal foil folding unit 10a having the glue application area 142 is attached to the carrier 20 along a diagonal line of a square carrier 20, and the metal foil unit 10 is attached to both ends of the metal foil folding unit 10a. The carrier 20 is adhered in the direction of the mutually perpendicular sides of the parallel carrier 20 to form a square spiral coil 1. The carrier 20 is made of an insulating material. In the embodiment, the carrier 20 is a plastic plate.

Referring to FIG. 6, another embodiment of the metal foil unit 30 of the present invention includes a metal foil 31 and two glue-coated regions 322 and 342 respectively located at the front surface 32 and the back surface 34 of the metal foil 31. A gap 320 is defined between the two glue application areas 322, and a gap 340 is defined between the two glue application areas 342. The glue zones 322 and 342 are each coated with a conductive paste.

Referring to FIG. 7 and FIG. 8, when the coil is fabricated, the plurality of metal foil monomers 30 are removed from the metal foil strip 100, and the glued regions 322 at the ends of the front faces 32 of some of the metal foil monomers 30 are folded at intervals 320. At 90 degrees, the two glue-coated regions 322 are respectively formed on both sides of the plane formed by the metal foil unit 30, and form a substantially L-shaped metal foil folding unit 30a (as shown in Fig. 7). The metal foil folding unit 30a is attached to the carrier 20 along a diagonal line of a square carrier 20, and the metal foil unit 30 is attached to both ends of the metal foil folding unit 30a and perpendicular to each other along the parallel carrier 20. The side edges are adhered to the carrier 20 to form a square spiral coil 2. The carrier 20 is made of an insulating material. In the embodiment, the carrier 20 is a plastic plate.

It is obvious that the metal foil folding unit 30a can be folded into a V shape in addition to being foldable into an L shape to form the coil 2 of other shapes.

9 is a third preferred embodiment of the strip of the present invention, the metal foil strip 200 includes a carrier strip 201 and a continuous (unbroken or uninterrupted) metal foil strip 210 attached to the surface of the strip 201. The release strip 201 is provided with a release layer on a side of the metal foil strip 210. In use, the metal foil strip 210 can be directly removed from the release layer. The metal foil strip 210 includes a metal foil 211 and a glue coating zone 214 spaced apart on both sides of the metal foil 211. A spacing 212 is disposed between each two adjacent glue coating zones 214. The foil strip 210 is folded to form a square spiral coil.

In the present embodiment, the metal foil members 10, 30 and the metal foil strips 210 are all copper foils, and may be other metal materials that can be used for coil fabrication, such as silver, aluminum, and the like.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧metal foil strip

101‧‧‧Strip

10‧‧‧Metal foil monomer

Claims (1)

A method for manufacturing a coil, comprising: providing a metal foil strip, the metal foil strip comprising a carrier strip and a metal foil removably attached to the surface of the carrier strip, the metal foil surface being provided with a glue coating area, the coating a plurality of intervals are arranged between the glue zones; a carrier plate made of an insulating material is provided; and the metal foil is peeled off from the carrier strip, and the metal foil is adhered to the carrier plate according to the shape of the coil required, and the metal foil is folded at intervals Forming a corner of the coil; wherein the carrier plate is square, the metal foil comprises a plurality of metal foil monomers, each metal foil monomer comprises a space on one side of the metal foil and two glues on both sides of the space Zone, the two rubber-coated areas of some metal foil monomers are folded at 90 degrees at intervals, and the two glue-coated areas are respectively folded on both sides of the plane formed by the folded metal foil, and then folded at intervals to make two coatings The glue zone is located on the same side of the plane formed by the metal foil unit after refolding, and the side of the metal foil folding unit provided with the glue application area is attached to the carrier board along the diagonal line of the carrier board, and the unfolded metal is attached. Foil monomer connected to two folded metal foils Both ends of the body and is adhered to the side of the carrier plate in a direction perpendicular to each other parallel to the carrier plate.