| 摘要 |
PROBLEM TO BE SOLVED: To provide a brushless motor that can be reduced in thickness, can obtain the right angle of a rotating shaft with high accuracy, and is reduced in the unevenness of rotation and vibration. SOLUTION: The brushless motor comprises: a motor base (10); a shaft (25) supported to the motor base via bearings (22, 23); a back yoke (20), that is a flat magnetic body and supported in the vicinity of the shaft in a direction orthogonal to the shaft on the motor base from one side; a plurality of coils (31) arranged at the other side; a ring-shaped magnet (24); and a rotor yoke (28), that rotates integrally with the shaft while making the magnet face the plurality of coils (31) at a prescribed interval (G). The plurality of coils are arranged around the shaft at intervals of equal angles, a non-arranged region (S) of the plurality of coils that is a prescribed angle range around the shaft is formed at the other face side, and a press-connecting means (34) that deforms the yoke to the magnet side is arranged between the motor base, in a region that is to be axisymmetric to the non-arranged region and the back yoke. COPYRIGHT: (C)2006,JPO&NCIPI
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