| 摘要 |
A stopper structure for use in a lens barrel assembly, the lens barrel assembly having a helicoid ring which includes a male helicoid, on the outer periphery of the helicoid ring, for engaging with a female helicoid on an inner periphery of a fixed barrel secured to a camera body; and gear teeth formed along the male helicoids to extend between the male helicoids and arranged in a circumferential direction about an optical axis, the helicoid ring moving along the optical axis while been driven by a pinion which is engaged with the gear teeth; wherein the stopper structure includes a stopper member which engages with at least one tooth of the gear teeth in order to prevent rotation of the helicoid ring.
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