| 摘要 |
Control mechanism ( 10 ) for an endoscope including first and second independently rotatable control knobs ( 18,20 ), an inner pinion shaft ( 22 ) fixed to the first control knob ( 18 ), an outer pinion shaft ( 28 ) fixed to the second control knob ( 20 ) and coaxial with the inner shaft ( 22 ) and an intermediate shaft ( 34 ) arranged at least partially inside of the outer shaft ( 28 ) and at least partially around the inner shaft ( 22 ). O-rings ( 42,46 ) between the intermediate shaft ( 34 ) and the inner and outer shafts ( 22,28 ) seal the interior of the endoscope and transfer torque from the inner or outer shaft ( 22,28 ) to the intermediate shaft ( 34 ), which is grounded against rotation and therefore does not transfer torque to the other shaft ( 22,28 ). A non-cross-coupling control mechanism is achieved in which the rotation of one control knob and its associated shaft does not have any effect on the other control knob and associated shaft.
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