Coil device and actuator

A coil device comprising:

• a first printed wiring board;
• and
• a second printed wiring board,
• wherein the first printed wiring board includes a first base film having a first main surface, and a first wire disposed on the first main surface,
• wherein the first wire includes a plurality of first coil portions each formed by winding the first wire spirally in plan view, the plurality of first coil portions being arranged along a circumferential direction,
• wherein the second printed wiring board includes a second base film having a second main surface and a third main surface, and a second wire disposed on the second main surface,
• wherein the third main surface faces the first main surface,
• wherein the second wire includes a plurality of second coil portions each formed by winding the second wire spirally in plan view, the plurality of second coil portions being arranged along the circumferential direction, and
• wherein the second printed wiring board is offset in the circumferential direction with respect to the first printed wiring board such that one second coil portion among the plurality of second coil portions overlaps, in plan view, two adjacent first coil portions among the plurality of first coil portions.