# US 12,224,105 B2 · Coil component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,105 B2 - Document ID: US12224105B2 - Status: Granted - Kind: B2 - Application number: 17/189,887 - Filed: 2021-03-02 - Published: 2021-09-09 - Granted: 2025-02-11 - Earliest claimed: 2020-03-03 - Assignees: TDK Corporation - Applicants: TDK Corporation - Inventors: Yugo Asai; Aoi Tokiwa; Daisuke Urabe - Web page: https://patentgrep.com/patent/US12224105B2 ## CPC - H01F 27/2823: {Wires (H01F27/2866 takes precedence)} - H01F 27/2828: {Construction of conductive connections, of leads} - H01F 3/10: Composite arrangements of magnetic circuits - H01F 17/045: {with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core} - H01F 27/26: Fastening parts of the core together; Fastening or mounting the core on casing or support (on coil H01F27/30) - H01F 27/29: Terminals; Tapping arrangements {for signal inductances} - H01F 38/48: {Common mode inductor for reducing or eliminating common mode noise on parallel lines} - H01F 41/0206: {Manufacturing of magnetic cores by mechanical means (magnetic cores per se H01F27/24)} - H01F 41/064: Winding non-flat conductive wires, e.g. rods, cables or cords - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract Disclosed herein is a coil component that includes: a drum-shaped core including a first flange part, a second flange part, and a winding core part positioned between the first and second flange parts; a plurality of first terminal electrodes provided on the first flange part; a plurality of second terminal electrodes provided on the second flange part; and a plurality of wires wound around the winding core part, each of the plurality of wires having a first end connected to an associated one of the first terminal electrodes, and having a second end connected to an associated one of the second terminal electrodes. Each of the first and second flange parts has a tapered groove whose side surfaces are inclined. The plurality of wires are accommodated in the tapered grooves. ## Claims ### Claim 1 A coil component comprising: a drum-shaped core including a first flange part, a second flange part, and a winding core part positioned between the first and second flange parts; a plurality of first terminal electrodes provided on the first flange part; a plurality of second terminal electrodes provided on the second flange part; and a plurality of wires wound around the winding core part, each of the plurality of wires having a first end connected to an associated one of the first terminal electrodes, and having a second end connected to an associated one of the second terminal electrodes, wherein each of the first and second flange parts has a tapered groove whose side surfaces are inclined, wherein the plurality of wires are accommodated in the tapered grooves, wherein a space factor of the plurality of wires in the tapered groove is 60% or more, wherein the plurality of wires include first and second wires, and wherein the first wire and the second wire contact each other inside the tapered groove. ### Claim 2 (depends on 1) The coil component as claimed in claim 1, further comprising a plate-like core fixed to the first and second flange parts, wherein the tapered groove is formed in a surface of each of the first and second flange parts that face the plate-like core, and wherein the plate-like core has another groove at a position overlapping the tapered groove of each of the first and second flange parts. ### Claim 3 (depends on 1) The coil component as claimed in claim 1, wherein the side surfaces of the tapered groove includes first and second side surfaces, wherein the tapered groove has a bottom surface located between the first and second side surfaces, and wherein a width of the bottom surface of the tapered groove is smaller than a sum of diameters of the first and second wires. ### Claim 4 (depends on 3) The coil component as claimed in claim 3, wherein the bottom surface of the tapered groove is flat. ### Claim 5 (depends on 4) The coil component as claimed in claim 4, wherein each of the first and second side surfaces of the tapered groove is curved. ### Claim 6 A coil component comprising: a first core including a flange part having first and second surfaces and a winding core part extending in a first direction, the first surface of the flange part having a first groove between first and second sections thereof, the second surface of the flange part being perpendicular to the first direction; first and second terminal electrodes formed on the second surface of the flange part and arranged in a second direction perpendicular to the first direction; a first wire wound around the winding core part and connected to the first terminal electrode via the first groove; and a second wire wound around the winding core part and connected to the second terminal electrode via the first groove, wherein the first groove has a bottom surface extending in the first and second directions and a first side surface located between the first section of the first surface and the bottom surface, wherein the first side surface is inclined with respect to the bottom surface such that an angle between the bottom surface and the first side surface is an obtuse angle, wherein a width of the bottom surface in the second direction is smaller than a sum of diameters of the first and second wires, and wherein the first wire and the second wire contact each other inside the first groove. ### Claim 7 (depends on 6) The coil component as claimed in claim 6, wherein at least one of the first and second wires contacts the first side surface. ### Claim 8 (depends on 7) The coil component as claimed in claim 7, wherein the first groove further has a second side surface located between the second section of the first surface and the bottom surface, wherein the second side surface is inclined with respect to the bottom surface such that an angle between the bottom surface and the second side surface is an obtuse angle, wherein the first wires contacts the first side surface, and wherein the second wires contacts the second side surface. ### Claim 9 (depends on 6) The coil component as claimed in claim 6, wherein a second core has a second groove overlapping the first groove, and wherein the first and second wires are pass through a through hole formed by the first and second grooves. ### Claim 10 (depends on 6) The coil component as claimed in claim 6, wherein the bottom surface of the first groove is flat. ### Claim 11 (depends on 10) The coil component as claimed in claim 10, wherein each of the first and second side surfaces of the first groove is curved.