Drive apparatus for zoom lens barrel

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

1997-12-09

1999-03-23

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359694, G02B 1514

Patent

active

058868313

ABSTRACT:
A drive apparatus for a zoom lens barrel, in which at least two movable zooming lens groups are moved upon zooming, includes lens frames which respectively hold the two movable zooming lens groups, two parallel drive plates which are provided with cam grooves and which are pivoted to a common shaft to move the two movable zooming lens groups, a pair of drive gears which are in mesh with corresponding sector gears of the drive plates, and two drive mechanisms which individually drive the drive gears upon zooming.

REFERENCES:
patent: 4763999 (1988-08-01), Lawther
patent: 5113261 (1992-05-01), Morisawa
patent: 5140468 (1992-08-01), Kayanuma
patent: 5166829 (1992-11-01), Iizuka
patent: 5196963 (1993-03-01), Sato et al.
patent: 5266992 (1993-11-01), Takaoka et al.
patent: 5485236 (1996-01-01), Arai et al.
patent: 5666580 (1997-09-01), Ito et al.

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