# US 2022/0029370 A1 · Electric wire manufacturing method and electric wire manufacturing apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0029370 A1 - Document ID: US20220029370A1 - Status: Published application - Kind: A1 - Application number: 17/380,102 - Filed: 2021-07-20 - Published: 2022-01-27 - Earliest claimed: 2020-07-22 - Assignees: Yazaki Corporation - Applicants: Yazaki Corporation - Inventors: Kei SATO - Web page: https://patentgrep.com/patent/US20220029370A1 ## CPC - H01R 43/0221: {Laser welding (H01R43/0228 takes precedence)} - H01R 43/0263: {for positioning or holding parts during soldering or welding process} - H01R 43/048: Crimping apparatus or processes (H01R43/042 takes precedence) - H01R 43/28: for wire processing before connecting to contact members, not provided for in groups H01R43/02 - H01R43/26 - H01B 13/003: {using irradiation} - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) ## Abstract An electric wire manufacturing method includes: a step of placing a core wire including a plurality of strands inside a tubular jig; and a step of forming a joined portion that integrates the strands by emitting laser light along an axial direction of the core wire toward a tip of the core wire placed inside the jig. In the placing step, the core wire is placed with a gap between an inner wall surface of the jig and an outer circumferential surface of the core wire while the tip of the core wire faces upward relative to a horizontal line. In the step of forming the joined portion, the joined portion is formed by filling the gap with a melted substance of the strands. ## Claims ### Claim 1 An electric wire manufacturing method comprising: placing a core wire inside a jig having a tubular shape, the core wire including a plurality of strands; and forming a joined portion that integrates the strands by emitting laser light toward a tip of the core wire placed inside the jig, the laser light being emitted in an axial direction of the core wire, wherein in the placing, the core wire is placed with a gap between an inner wall surface of the jig and an outer circumferential surface of the core wire while the tip of the core wire faces upward relative to a horizontal line, and in the forming the joined portion, the joined portion is formed by filling the gap with a melted substance of the strands. ### Claim 2 (depends on 1) The electric wire manufacturing method according to claim 1, wherein in the placing, the gap is made between the inner wall surface of the jig and the outer circumferential surface of the core wire over an entire circumference of the outer circumferential surface of the core wire. ### Claim 3 (depends on 1) The electric wire manufacturing method according to claim 1, wherein in the placing, a plurality of the core wires are placed inside the jig and the gap is made between the outer circumferential surface of each of the core wires and the inner wall surface of the jig, and in the forming the joined portion, the joined portion that integrates the core wires is formed by emitting laser light toward tips of the core wires. ### Claim 4 (depends on 2) The electric wire manufacturing method according to claim 2, wherein in the placing, a plurality of the core wires are placed inside the jig and the gap is made between the outer circumferential surface of each of the core wires and the inner wall surface of the jig, and in the forming the joined portion, the joined portion that integrates the core wires is formed by emitting laser light toward tips of the core wires. ### Claim 5 (depends on 1) The electric wire manufacturing method according to claim 1, further comprising: connecting a terminal to the joined portion, wherein in the connecting the terminal, the terminal is crimped to the joined portion or the joined portion is brought into pressure contact with the terminal. ### Claim 6 (depends on 2) The electric wire manufacturing method according to claim 2, further comprising: connecting a terminal to the joined portion, wherein in the connecting the terminal, the terminal is crimped to the joined portion or the joined portion is brought into pressure contact with the terminal. ### Claim 7 (depends on 1) The electric wire manufacturing method according to claim 1, further comprising: joining the joined portion formed in a first electric wire and the joined portion formed in a second electric wire together. ### Claim 8 (depends on 2) The electric wire manufacturing method according to claim 2, further comprising: joining the joined portion formed in a first electric wire and the joined portion formed in a second electric wire together. ### Claim 9 (depends on 1) The electric wire manufacturing method according to claim 1, wherein the placing and the forming the joined portion use the jig that is transparent and configured to transmit the laser light. ### Claim 10 (depends on 2) The electric wire manufacturing method according to claim 2, wherein the placing and the forming the joined portion use the jig that is transparent and configured to transmit the laser light. ### Claim 11 (depends on 3) The electric wire manufacturing method according to claim 3, wherein the placing and the forming the joined portion use the jig that is transparent and configured to transmit the laser light. ### Claim 12 (depends on 4) The electric wire manufacturing method according to claim 4, wherein the placing and the forming the joined portion use the jig that is transparent and configured to transmit the laser light. ### Claim 13 (depends on 5) The electric wire manufacturing method according to claim 5, wherein the placing and the forming the joined portion use the jig that is transparent and configured to transmit the laser light. ### Claim 14 (depends on 6) The electric wire manufacturing method according to claim 6, wherein the placing and the forming the joined portion use the jig that is transparent and configured to transmit the laser light. ### Claim 15 (depends on 7) The electric wire manufacturing method according to claim 7, wherein the placing and the forming the joined portion use the jig that is transparent and configured to transmit the laser light. ### Claim 16 (depends on 8) The electric wire manufacturing method according to claim 8, wherein the placing and the forming the joined portion use the jig that is transparent and configured to transmit the laser light. ### Claim 17 An electric wire manufacturing apparatus comprising: a jig having a tubular shape, the jig being configured to accommodate a core wire including a plurality of strands while a tip of the core wire faces upward relative to a horizontal line; a holding mechanism configured to hold the core wire providing a gap between an inner wall surface of the jig and an outer circumferential surface of the core wire; and an emitting part configured to emit laser light toward the tip of the core wire placed inside the jig to form a joined portion by filling the gap with a melted substance of the strands, the laser light being emitted in an axial direction of the core wire.