| 摘要 |
A speculum includes a main body with a pair of first dilator fingers that are connected at their respective proximal ends to the main body. A second dilator finger extends between the first dilator fingers and is attached to the main body. An actuator is pivotally coupled to the main body. The actuator is formed with a third dilator finger that is located between the first dilator fingers and opposite the second dilator finger. When the actuator is pivoted, the third dilator finger immediately commences to pivot away from the remaining fingers. After a predetermined degree of pivot, the actuator comes into contact with the inside of the first fingers to cause the distal ends of those fingers to move away from each other.
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