Lens barrel and optical apparatus having the same

Details Lens barrel and optical apparatus having the same Lens barrel and optical apparatus having the same

1999-01-25

2000-10-03

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359698, 359699, G02B 1514

Patent

active

061281417

ABSTRACT:
A lens barrel includes a moving tube arranged to move in an optical axis direction, the moving tube having at least three cams arranged along a circumferential direction thereof, in which an interval between one pair of cams in the circumferential direction is larger than an interval between another pair of cams in the circumferential direction, a cutout being formed in the moving tube at a part between the one pair of cams having the larger interval, and a driving device disposed on the side of the cutout of the moving tube and including a motor having a rotation shaft parallel with the optical axis direction and a gear mechanism having an output gear arranged to rotate according to a rotation of the rotation shaft, the motor and the output gear being juxtaposed, and end parts of the motor and the output gear on the side of the moving tube being inserted within the cutout of the moving tube at least when the moving tube comes closest to the motor and the output gear.

REFERENCES:
patent: 5387835 (1995-02-01), Tasukimoto et al.
patent: 5742850 (1998-04-01), Nomura et al.

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