| 摘要 |
A device for generating a motive force includes a tubular housing, a driving member, and a magnetic unit. The driving member is movably disposed in the tubular housing and includes a magnet. The magnetic unit includes first and second magnets, each of which covers a respective one of first and second open ends of the tubular housing. The construction as such permits alternate reversal of a polarity of a magnetic field of the magnet of the driving member to cause reciprocating movement of the driving member in the tubular housing.
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