Lens barrel with a rotational motion transmitting portion
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United States of America Patent
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-
Dec 2, 1997
Grant Date -
N/A
app pub date -
Aug 26, 1996
filing date -
Aug 31, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A lens barrel including a lens holding cylinder holding a lens unit and rotatable about the optical axis of the lens barrel, and a holding cylinder rotating mechanism for rotatively moving the lens holding cylinder to thereby move the lens unit along the optical axis, the holding cylinder rotating mechanism having a rotatable portion disposed outside a fixed cylinder and effecting rotational motion, a rotational motion transmitting portion for transmitting only the rotational motion about the optical axis of the rotational motion of the rotatable portion to the inside of the fixed cylinder, and a holding cylinder rotating portion for transmitting the motion of the rotational motion transmitting portion along the direction of the optical axis and rotating the lens holding cylinder.
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