05701206 is referenced by 8 patents and cites 9 patents.

A rotary feed mechanism of a camera includes a stationary barrel secured to a camera body. Multiple-female threads are provided in an inner surface of the stationary barrel. A rotatable barrel is coaxially and movably inserted in the stationary barrel. The rotatable barrel is provided with multiple-male threads on an inner surface to engage the multiple-female threads of the stationary barrel. The linearly movable lens barrel is provided with multiple-male threads to engage the multiple-female threads of the stationary barrel. The linearly movable lens barrel supports a plurality of lenses arranged to be movable in an optical axis direction. A linear guide is provided on the linearly movable lens barrel, for moving the linearly movable lens barrel along the optical axis direction without causing rotation while the rotatable barrel is rotated. The linear guide has a projection to be guided by a linear guide groove formed on the stationary barrel. An idle device is provided on the stationary barrel for substantially preventing the rotatable barrel from advancing in the optical axis direction with respect to the stationary barrel only when the rotatable barrel is being assembled in the predetermined initial position with respect to the stationary barrel.

Title
Rotary feed mechanism
Application Number
8/672337
Publication Number
5701206
Application Date
June 28, 1996
Publication Date
December 23, 1997
Inventor
Hiroshi Nomura
Tokyo
JP
Takamitsu Sasaki
Tokyo
JP
Agent
Greenblum & Bernstein
Assignee
Asahi Kogaku Kogyo Kabushiki Kaisha
JP
IPC
G02B 7/02
G02B 15/14
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