| 摘要 |
Hand-held surgical instruments include magnetic couplings which impart simultaneous reciprocal rotary and longitudinal motions or oscillations to a distally located workpiece. In preferred embodiments, the magnetic couplings include a drive shaft, an output shaft coaxially aligned with the drive shaft relative to a central axis, and drive and driven magnet assemblies connected operatively to the drive and output shafts, respectively. The drive and driven magnet assemblies include permanent magnets arranged to translate continuous rotation of the drive shaft into simultaneous rotary and longitudinal movements of the driven magnet assembly relative to the drive axis. A resilient support member exhibiting torsional and longitudinal resiliency (e.g., an annular elastomeric disc) is most preferably operatively connected to the output shaft to allow for such simultaneous rotary and longitudinal movements thereof.
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