| 摘要 |
A speculum (10) comprises a plurality of dilator fingers (12, 14, 16 and 18) which are disposed about and pivotally coupled to a support (20). The support (20) comprises an annular head portion (22) having a central opening (24). Handle (26) is formed integrally with and extends from the head portion (22). An actuator (28) is rotatably coupled to the support (20) and engages the fingers (12-18) so that when the actuator is rotated in the first direction, it contacts a first side of each of the fingers (12-18) to pivot the fingers in a manner so that their respective distal ends (12D, 14D, 16D and 18D) move away from each other; and when rotated in a second opposite direction, the actuator (28) contains opposite sides of each finger (12-18) pivoting the fingers in a manner so that their distal ends (12D-18D) move toward each other. The fingers (12-18) are held in place by retaining ring (94) which sits inside the central opening (24) of the head portion (22). The retaining ring (94) is itself held in place by the actuator (28).
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