Lens drive device
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United States of America Patent
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Jun 7, 1988
Grant Date -
N/A
app pub date -
Aug 4, 1986
filing date -
Aug 5, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lens drive device of the invention is disclosed comprising a motor drive for each lens of zoom means and focusing means, whereby a motor is made to have a concentric layer structure about a photographic optical axis, and a single magnetic circuit for the motor having the aforesaid layer structure is formed by a single permanent magnet.
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