# US 12,002,616 B2 · Coil device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,002,616 B2 - Document ID: US12002616B2 - Status: Granted - Kind: B2 - Application number: 17/089,859 - Filed: 2020-11-05 - Published: 2021-08-12 - Granted: 2024-06-04 - Earliest claimed: 2019-11-05 - Assignees: TDK Corporation - Applicants: TDK Corporation - Inventors: Toshiyuki Horikawa; Masaaki Iwakura; Masaru Kumagai; Shoichi Sasaki - Web page: https://patentgrep.com/patent/US12002616B2 ## CPC - H01F 27/2823: {Wires (H01F27/2866 takes precedence)} - H01F 27/2828: {Construction of conductive connections, of leads} - H01F 27/02: Casings - H01F 27/29: Terminals; Tapping arrangements {for signal inductances} - H01F 27/325: {Coil bobbins (formers for coils in general H01F5/02)} - H01F 27/24: Magnetic cores - H01F 27/266: {Fastening or mounting the core on casing or support (on coil H01F27/30)} - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract A coil device includes a bobbin, a terminal, and a terminal block. The bobbin includes a winding portion for winding a wire around an outer circumference of the winding portion. The terminal is connectable with an end of the wire. The terminal block holds the terminal. The terminal is movable both in a first axis and a second axis of the bobbin. ## Claims ### Claim 1 A coil device comprising: a bobbin including a winding portion; a wire wound around an outer circumference of the winding portion; a terminal connected to an end of the wire; and a terminal block that holds the terminal, wherein: the terminal block has an engagement hole that receives an engagement part of the terminal such that a gap is between an inner peripheral surface of the engagement hole and an outer peripheral surface of the engagement part; and the engagement hole and the engagement part are configured such that the engagement part can move relative to the engagement hole in all directions perpendicular to a longitudinal axis of the engagement hole due to the gap. ### Claim 2 (depends on 1) The coil device according to claim 1, wherein the terminal block is attached to a case for housing the bobbin or to a cover for covering at least a part of the bobbin. ### Claim 3 (depends on 1) The coil device according to claim 1, wherein the terminal is attached to the terminal block so as to movable along the longitudinal axis. ### Claim 4 (depends on 1) The coil device according to claim 1, wherein the terminal block is movable relative to the bobbin along the longitudinal axis. ### Claim 5 (depends on 1) The coil device according to claim 1, wherein the terminal block is movable along the longitudinal axis, and the terminal is integral with the terminal block. ### Claim 6 (depends on 1) The coil device according to claim 1, wherein the terminal comprises a plurality of the terminals, the terminal block comprises a plurality of the terminal blocks, and the plurality of the terminals is attached to the plurality of the terminal blocks. ### Claim 7 (depends on 1) The coil device according to claim 1, wherein: one of the bobbin and the terminal block has an engagement convex portion protruding in a first direction perpendicular to the longitudinal axis; another of the bobbin and the terminal block has an engagement concave portion; the engagement convex portion is received in the engagement concave portion; and the engagement convex portion and the engagement concave portion are configured such that the engagement convex portion is movable relative to the engagement concave portion in directions perpendicular to the longitudinal axis within a predetermined range. ### Claim 8 (depends on 7) The coil device according to claim 7, wherein an inner wall constituting the engagement concave portion is partly structured by a support piece elastically deformable to open an entrance width of the engagement concave portion, and the support piece is has a stopper convex portion serving as a retainer by engaging the engagement convex portion. ### Claim 9 (depends on 7) The coil device according to claim 7, further comprising a stopper wall portion serving as a retainer by being attached to the engagement convex portion inserted in the engagement concave portion, wherein the stopper wall portion includes an engagement portion for engaging the engagement convex portion. ### Claim 10 (depends on 7) The coil device according to claim 7, further comprising a stopper wall portion serving as a retainer by being attached to the engagement convex portion inserted in the engagement concave portion, wherein the stopper wall portion is connected to the engagement convex portion with resin. ### Claim 11 (depends on 1) The coil device according to claim 1, wherein: one of the bobbin and the terminal block has an engagement convex portion protruding along the longitudinal axis or in a first direction perpendicular to the longitudinal axis; another of the bobbin and the terminal block has an engagement concave portion; the engagement convex portion is received in the engagement concave portion; and the engagement convex portion and the engagement concave portion are configured such that the engagement convex portion can move relative to the engagement concave portion in the first direction or a second direction perpendicular to the first direction and the longitudinal axis within a predetermined range. ### Claim 12 (depends on 11) The coil device according to claim 11, wherein the engagement convex portion includes a main convex portion and a sub convex portion, the engagement concave portion includes a main concave portion that receives the main convex portion and a sub concave portion that receives the sub convex portion, the engagement convex portion and the engagement concave portion are configured such that a first gap between the sub convex portion and the sub concave portion is smaller than a second gap between the main convex portion and the main concave portion along the longitudinal axis, and the terminal block is held movably relative to the bobbin in the all directions perpendicular to the longitudinal axis along a guide surface where the sub convex portion and the sub concave portion contact with each other. ### Claim 13 (depends on 1) The coil device according to claim 1, wherein the terminal includes: a wire connection portion connected to the end of the wire; and a hook portion at a different position from the wire connection portion and inserted movably along the longitudinal axis into a terminal groove of the terminal block. ### Claim 14 (depends on 13) The coil device according to claim 13, wherein the terminal includes: an insertion hole between the wire connection portion and the hook portion; and an external circuit connection piece between the wire connection portion and the hook portion. ### Claim 15 (depends on 13) The coil device according to claim 13, wherein the terminal block has an inner cover that engages the hook portion and restricts a movement range of the terminal along the longitudinal axis. ### Claim 16 (depends on 15) The coil device according to claim 15, wherein the terminal block has an outer cover covering the inner cover, an end of the terminal block in a first direction perpendicular to the longitudinal axis, and an end of the terminal block in a second direction perpendicular to the longitudinal axis and the first direction. ### Claim 17 (depends on 16) The coil device according to claim 16, wherein the outer cover covers an end of the terminal block along the longitudinal axis so as to expose the wire connection portion. ### Claim 18 A coil device comprising: a bobbin including a winding portion with a longitudinal axis; a wire wound around an outer circumference of the winding portion; a terminal connected to an end of the wire; and a terminal block that holds the terminal; wherein: one of the bobbin and the terminal block has an engagement convex portion; another of the bobbin and the terminal block has an engagement concave portion; the engagement convex portion is received in the engagement concave portion such that a gap is between an inner peripheral surface of the engagement concave portion and an outer peripheral surface of the engagement convex portion; and the engagement convex portion and the engagement concave portion are configured such that terminal block can move relative to the bobbin in all directions perpendicular to the longitudinal axis due to the gap.