| 摘要 |
PURPOSE:To obtain a high-accuracy parallel displacement mechanism whose constitution is simple by moving a moving body where a lens is attached while making the sliding part of the moving body always abut on the specified guiding part of a guiding plate. CONSTITUTION:Groove pulleys 20a and 20b of the sliding part of the moving body 20 of a copying machine, etc., where the lens 21 is attached are made to abut on the guiding parts 22a and 22b of the guiding plate 22, which have specified moving loci, and energized right downward by a spring 29. A wire 23 is attached to the pin 20d of the moving body 20 and wound to a drum 26 before it is connected to a connection pin 29a. By rotating the drum 26 in a direction shown by an arrow 30 with such a constitution, the wire 23 moves in a direction shown by an arrow 31 and the moving body 20 moves left upward along the guiding part 22. At such a time, moments are always imposed on the moving body 20, which can be accurately moved in parallel and along the arc-shaped locus. |
