| 摘要 |
PROBLEM TO BE SOLVED: To provide a coil device for wireless power transmission in which a magnetic core and a metal material, e.g., a wire composing a coil arranged on the periphery of the magnetic core, are insulated sufficiently, and external impact can be buffered.SOLUTION: A coil unit 10 for wireless power transmission includes a magnetic core 2, a bobbin 3 provided around the magnetic core 2, and a wire 4 wound around the bobbin 3. The bobbin 3 is constituted by combining split first part 3a and second part 3b. The first part 3a has a protrusion 31a at a part 30a facing the second part 3b, and the second part 3b has a groove 31b along the whole protrusion 31a at a part 30b facing the first part 3a. The whole protrusion 31a and the whole groove 31b are separated from each other. |
