| 摘要 |
PROBLEM TO BE SOLVED: To provide a device in which a movable part is low in mass, and moreover, which can output a high torque. SOLUTION: In a first magnetic circuit and a second magnetic circuit, both end sides of a shaft 7 are freely slidably supported by bearings 6A, 6B. Further, first yokes 4A, 4B, magnets 3A, 3B, and second yokes 5A, 5B are provided around the bearings 6A, 6B. Also, a driving coil 9 is provided around the shaft 7. The magnetic flux becomes large in one of the overlapped parts of a magnetic circuit generated at the start of the driving coil 9 and the first magnetic circuit or the second magnetic circuit, and the magnetic flux becomes small in the other overlapped part. As a result, the shaft 7 is moved in the direction to the portion where the magnetic flux is large. COPYRIGHT: (C)2005,JPO&NCIPI
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