| 摘要 |
A SPECULUM 10 INCLUDES A MAIN BODY 12 WITH TWO DIALATOR FINGERS 14A AND 14B THAT ARE CONNECTED AT THEIR RESPECTIVE PROXIMAL ENDS 16A AND 16B TO THE MAIN BODY 12. A FURTHER DIALATOR 28 EXTENDS BETWEEN THE FINGERS 14A AND 14B AND IS FIXED TO THE MAIN BODY 12. AN ACTUATOR 20 IS PIVOTALLY COUPLED TO THE MAIN BODY 12. THE ACTUATOR 20 IS FORMED WITH A DIALTOR FINGER 70 THAT IS LOCATED BETWEEN THE FINGERS 14A AND 14B AND OPPOSITE THE FIXED FINGER 28. WHEN THE ACTUATOR 20 IS PIVOTED THE FINGER 70 IMMEDIATELY COMMENCES TO PIVOT AWAY FROM THE REMAINING FINGERS 14 AND 28. AFTER A PREDETERMINED DEGREE OF PIVOT, THE ACTUATOR 20 COMES INTO CONTACT WITH THE SIDE OF FINGERS 14 NEAR THEIR APPROXIMAL ENDS 16 TO CAUSE THE DISTAL ENDS OF THOSE FINGERS TO MOVE AWAY FROM EACH OTHER. FINGERS 14A AND 14B ARE HINGED ABOUT RESPECTIVE CANTED HINGE AXIS SO THAT WHEN THEY ARE ABUTED BY THE ACTUATOR 20 THEY MOVE IN A COMBINED UPWARD AND SIDEWAYS MOTION.
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