| 摘要 |
PROBLEM TO BE SOLVED: To provide a reciprocating motion device safely usable without the possibility of an electric leak due to the entry of water into a motor in a drive device used in water. SOLUTION: A cylindrical magnet having an N-pole and an S-pole magnetized on the left and right sides thereof of the rotating center of the motor, and two magnets are disposed in the outer peripheral direction of the cylindrical magnet with a case interposed therebetween so that the same magnetic poles thereof face each other on a straightline while holding predetermined distances from the center of the cylindrical magnet. These two magnets are connected to each other, and a part of the connection part is held by only a bearing so as to be movable around the cylindrical magnet in the direction of a straightline. Since an attraction and a repulsion can be simultaneously generated between the cylindrical magnet and these two magnets, respectively, by rotating the cylindrical magnet at the center of the two magnets by the motor, the drive device can be reciprocably moved without touching the motor. COPYRIGHT: (C)2007,JPO&INPIT
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