Drive apparatus for zoom lens barrel

Details Drive apparatus for zoom lens barrel Drive apparatus for zoom lens barrel

1997-12-09

1999-07-27

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

059300531

ABSTRACT:
A drive apparatus for a zoom lens barrel having a plurality of movable lens groups, comprising: a lens barrel body which supports lens frames of the movable lens groups to move linearly in the optical axis direction, a lens drive unit which is assembled independently of the lens barrel body, driven pins provided on the lens frames and projecting outward from the barrel body in the same direction, and a plurality of drive members having engaging portions engageable with the driven pins. The drive motor which independently drives the drive members and drive gears connects the drive members to the drive motor, is provided in said lens drive unit. The lens drive unit is secured to the lens barrel body in a state that the driven pins projecting from the lens barrel body are engaged by the engaging portions of the corresponding drive members of the lens drive unit.

REFERENCES:
patent: 5016993 (1991-05-01), Akitake
patent: 5113261 (1992-05-01), Morisawa
patent: 5266992 (1993-11-01), Takaoka et al.
patent: 5485236 (1996-01-01), Arai et al.
patent: 5592335 (1997-01-01), Omi et al.
patent: 5774282 (1998-06-01), Kohmoto et al.

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