Lens barrel with internal motor focusing

Details Lens barrel with internal motor focusing Lens barrel with internal motor focusing

1986-12-30

1988-03-15

Punter, William H.

G02B 704

Patent

active

047309016

ABSTRACT:
A lens barrel includes a stationary tube secured to the inner side of a stationary lens barrel member with a given space kept between them, and a motor disposed within the space. A helicoidal surface is arranged along the inner circumference of the stationary tube to be in screwed engagement with the helicoidal surface of a lens-carrying frame arranged to carry lenses which are shiftable in the direction of their optic axis, and a connecting member extends to the inner circumference of the stationary tube to cause the rotation of a rotary tube which has a toothed part engaging the output gear of the motor to be transmitted to the lens-carrying frame.

REFERENCES:
patent: 4519691 (1985-05-01), Yamada et al.
patent: 4525053 (1985-06-01), Shiokama et al.
patent: 4527879 (1985-07-01), Hosoe et al.
patent: 4598989 (1986-07-01), Yamada et al.

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