# US 11,309,118 B2 · Coil component and inductor

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- Number: US 11,309,118 B2
- Document ID: US11309118B2
- Status: Granted
- Kind: B2
- Application number: 16/315,628
- Filed: 2017-07-05
- Published: 2019-10-17
- Granted: 2022-04-19
- Earliest claimed: 2016-07-05
- Assignees: KYOCERA Corporation
- Applicants: KYOCERA Corporation
- Inventors: Takanori Konishi; Hiroshi Hamashima
- Web page: https://patentgrep.com/patent/US11309118B2

## CPC

- H01F 17/045: {with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core}
- H01F 27/263: {Fastening parts of the core together}
- H01F 27/2823: {Wires (H01F27/2866 takes precedence)}
- H01F 27/292: {Surface mounted devices}
- H01F 41/0206: {Manufacturing of magnetic cores by mechanical means (magnetic cores per se H01F27/24)}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

There is provided a coil component which includes a core; and a plurality of leg portions provided at respective ends of the core, wherein each of the leg portions includes a protrusion which protrudes inward with respect to a joint between the core and the leg portion.

## Claims

### Claim 1

An inductor comprising:
a core;
a plurality of leg portions provided at respective ends of the core; and
a conducting wire wound around the core,
wherein each of the leg portions includes a protrusion that protrudes inward with respect to a joint between the core and the leg portion,
the leg portion includes an end surface, an inner surface, an outer surface opposite to the inner surface, an intersecting portion in the shape of a curved surface located between the inner surface and the end surface, an electrode layer located on the intersection portion and having an inner end line located in the inner surface of the leg portion and an outer end line located in the outer surface of the leg portion, and a distance from the end surface to the inner end line being smaller than a distance from the end surface to the outer end line, and
the conducting wire includes a straight portion extending from the core to the intersection portions, the straight portion extending in a direction orthogonal to an axial direction of the core, at a distance from the leg portion, and terminating in an end portion connected to the electrode layer located on the intersecting portion.

### Claim 2 (depends on 1)

The inductor according to claim 1, wherein
the protrusion includes a convexly-curved surface.

### Claim 3 (depends on 1)

The inductor according to claim 1, wherein
the protrusion includes an inclined surface.

### Claim 4 (depends on 3)

The inductor according to claim 3, wherein
an angle formed between an end surface of the leg portion and the inclined surface is equal to or larger than 70 degrees and is equal to or smaller than 80 degrees.