Power transmission mechanism optimum for optical system of image

Details Power transmission mechanism optimum for optical system of image Power transmission mechanism optimum for optical system of image

1993-12-10

1996-04-16

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355 58, 355243, G03G 1528

Patent

active

055087914

ABSTRACT:
The invention relates to a power transmission mechanism included in the optical system of an image forming apparatus. A power transmission mechanism according to a first mode composes a link mechanism for interlocking the moving member for adjusting the optical path length, in response to the displacement of a lens unit, when changing the magnification factor of the original image. This link mechanism comprises an output unit integrally composed on the lens unit, and a cam member for converting the moving extent of the lens unit by a lever ratio of two cams and transmitting to the moving member. On the other hand, a power transmission mechanism according to a second mode of the invention includes torque transmission mechanism for transmitting a torque alternatively to a scanning mechanism and a magnification varying mechanism. The torque transmission mechanism includes elastic linings to be pressed alternatively to the input members of the scanning mechanism and magnification varying mechanism.

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patent: 5113225 (1992-05-01), Deguchi
patent: 5355198 (1994-10-01), Saito

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