Flexible Coil

• US 20100001823A1
• Filed: 10/05/2006
• Published: 01/07/2010
• Est. Priority Date: 12/07/2005
• Status: Active Grant

• Current Assignee: Sumida Corporation
• Original Assignee: Sumida Corporation
• Inventors: Kawarai, Mitsugu
• Granted Patent: US 8,373,534 B2
• Time in Patent Office: Days
• US Class Current: 336/200
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 17/043 with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
• CPC Class Codes: H01F 2017/006 flexible printed inductors
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: Y10T 29/4902 Electromagnet, transformer or inductor

Abstract

The present invention is to provide a coil having flexibility even if it includes a core body. A flexible coil 10 comprises a plurality of sheet-like coils laminated together in a region sharing a magnetic flux, wherein each sheet-like coil has a coil section formed along a surface of an insulating sheet having flexibility; and magnetic bodies 80 and 81 that have flexibility and sandwich the plurality of the laminated sheet-like coils.

Claims

1. A flexible coil comprising:

a plurality of sheet-like coils laminated together in a region sharing a magnetic flux, wherein each sheet-like coil has a coil section formed along a surface of an insulating sheet having flexibility; and

a plurality of magnetic bodies that have flexibility and sandwich the plurality of the laminated sheet-like coils.

2. The flexible coil according to claim 1, wherein the sheet-like coil comprises a coil connecting portion installed in the inner periphery of the coil section and an electrode terminal portion installed in the outer periphery of the coil section, wherein the electrode terminal portion includes a terminal connecting portion that connects to the electrode terminal portion of the other sheet-like coil installed on a back side and wherein an end portion of the inner periphery of the coil section is connected to the coil connecting portion and an end of the outer periphery of the coil section is connected to the electrode terminal portion.

3. The flexible coil according to claim 2, wherein the coil connecting portion and the terminal connecting portion are through hole portions which form a conductive layer in each of the inner surface.

4. The flexible coil according to claim 1, wherein the other insulating sheet covers over a surface on which the coil section is exposed when the sheet-like coil is installed or a plurality of the sheet-like coils are laminated.

5. The flexible coil according to claim 4, wherein the width of the other insulating sheet is smaller than the width of the sheet-like coil and the electrode terminal portion is exposed from both outsides of the other insulating sheet.

6. The flexible coil according to claim 2, wherein one sheet-like coil including the coil section of which a diameter becomes smaller from a clockwise direction or a counter clock wise direction is laminated with the other sheet-like coil including the coil section of which a diameter becomes lager from a clockwise direction or a counter clock wise direction.

7. The flexible coil according to claim 2, wherein one or more holes and one or more concave portions are formed in a center and both ends of the sheet-like coil and the magnetic body has a configuration which gets into the holes and the concave portions.