| 摘要 |
A zoom lens control mechanism includes a lens barrel with a lens group arranged in advance therein, a lens barrel support portion for the lens barrel seated on, a guiding device and a driving device. The lens barrel has three cylinders with the same center, and each of the cylinders has a post disposed at the bottom edge thereof and arranged with the imaginary center of the cylinders on the same line. Each of the cylinders except the innermost cylinder further has an elongated slot extended along the outer surface thereof. The guiding device is received in the two elongated slots and fixed on the innermost cylinder for leading the cylinders of the lens barrel moving relatively along the optical axis in the range of the allowable deviation. The lens barrel support portion includes three protruding cylinders which have the same center thereof for mating with the corresponding cylinders of the lens barrel. Each of the protruding cylinders has plural projecting surfaces respectively for the corresponding post of the lens barrel seated on. The driving device is connected to the lens barrel support portion. In zooming operation, the driving device drives the lens barrel support portion rotating and consequently forcing the posts of the cylinders of the lens barrel to move respectively along the corresponding one of the projecting surfaces of the lens barrel support portion so as to effect zooming.
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