Lens barrel incorporating a motor
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United States of America Patent
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-
Jul 28, 1987
Grant Date -
N/A
app pub date -
Jan 2, 1985
filing date -
Jan 10, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is disclosed a lens barrel incorporating a motor comprising a permanent magnet, a hollow cylindrical coil and a hollow yoke member arranged in the stated order or in an inverted order inside a fixed tube of the lens barrel, wherein a commutator is provided on the internal periphery of an end aperture of the hollow cylindrical coil while brushes are provided on the facing external periphery of the hollow magnet or yoke member, and the hollow cylindrical coil is supported at the end apertures by bearing members, and further comprising a frame supporting an imaging lens in helicoidal coupling with an annular member fixed to the hollow cylindrical coil and internally provided with a helicoid.
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