# US 12,603,220 B2 · Coil component

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- Number: US 12,603,220 B2
- Document ID: US12603220B2
- Status: Granted
- Kind: B2
- Application number: 17/828,335
- Filed: 2022-05-31
- Published: 2022-12-01
- Granted: 2026-04-14
- Earliest claimed: 2021-06-01
- Assignees: TDK Corporation
- Applicants: TDK Corporation
- Inventors: Hanako Yoshino; Keigo Higashida; Daisuke Urabe; Takashi Arasawa; Yugo Asai
- Web page: https://patentgrep.com/patent/US12603220B2

## CPC

- H01F 27/292: {Surface mounted devices}
- H01F 27/306: {Fastening or mounting coils or windings on core, casing or other support}
- H01F 17/045: {with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core}
- H01F 27/2828: {Construction of conductive connections, of leads}
- H01F 27/29: Terminals; Tapping arrangements {for signal inductances}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

Disclosed herein is a coil component that includes a drum core; a terminal fitting fixed respectively to the flange part of the drum core; and a wire wound around the winding core part of the drum core. The terminal fitting has a wire connecting part to which the wire is connected and a mounting part having springiness with respect to the drum core. The distance between the flange part and the mounting part is larger than the distance between the flange part and the wire connecting part.

## Claims

### Claim 1

A coil component comprising:
a core having a winding core part and a flange part;
a terminal fitting fixed to the flange part; and
a wire wound around the winding core part,
wherein the flange part has a first surface including first, second, and third regions,
wherein the winding core part extends in a first direction,
wherein the first, second, and third regions are arranged in a second direction perpendicular to the first direction such that the third region is arranged between the first and second regions in the second direction,
wherein the terminal fitting has a wire connecting part to which the wire is connected and a mounting part,
wherein the wire connecting part contacts the first region of the first surface without contacting the second and third regions,
wherein the mounting part covers the second region of the first surface without covering the first and third regions so as not to contact the second region of the first surface,
wherein the third region does not contact the wire connecting part and is not covered with the mounting part, and
wherein the second region is greater in width in the second direction than each of the first and third regions.

### Claim 2 (depends on 1)

The coil component as claimed in claim 1, wherein the first surface is substantially flat over the first, second, and third regions.

### Claim 3 (depends on 1)

The coil component as claimed in claim 1, wherein the terminal fitting has a slit positioned between the wire connecting part and the mounting part in the second direction, and
wherein the slit overlaps the third region of the first surface so as not to overlap the first and second regions.

### Claim 4 (depends on 1)

The coil component as claimed in claim 1, wherein the wire is an only wire wound around the winding core part of the core.

### Claim 5 (depends on 4)

The coil component as claimed in claim 4, wherein the terminal fitting is an only terminal fitting fixed to the flange part of the core.

### Claim 6 (depends on 1)

The coil component as claimed in claim 1, wherein an end of the wire connected to the wire connecting part is located over the second region of the first surface.

### Claim 7 (depends on 6)

The coil component as claimed in claim 6, wherein a part of the wire connecting part is sandwiched between the end of the wire and the first surface of the flange part.