PRINTED COIL AND PRINTED MOTOR

PROBLEM TO BE SOLVED: To provide a printed coil capable of increasing, as a printed motor, output power thereof. SOLUTION: This printed coil includes a plurality of layers in which a plurality of coil pieces 21a, 22a are annularly juxtaposed with an insulating board sandwiched. The coil pieces 21a, 22a in different layers are connected at the radially inner end portion and the radially outer end portion so as to form an annular coil 31 when viewed from the axial direction. The respective coil pieces 21a, 22a include inner involute curved portions 21d, 22d which are disposed on the radial inner side and formed into involute curves when viewed from the axial direction, and outer involute curved portions 21e, 22e which are disposed on the radial outside and formed into involute curves when viewed from the axial direction. The diameter of a base circle E2 of the outer involute curved portions 21e, 22e is set smaller than the diameter of a basic circle E1 of the inner involute curved portions 21d, 22d. COPYRIGHT: (C)2005,JPO&NCIPI