Fine-adjusting device for accurate positioning an adjusting element

Abstract

The invention relates to a fine-adjusting device made of a metal plate (30,40), in which slots, arranged in pairs and ending at both ends in holes, form at least a bar parallelogram (30-33; 40-43) with play-free flexible hinges (34-37, 44-47) as pivots, each bar parallelogram being provided with a fixed bar (30;40), a shifting bar (33;43) parallel to this fixed bar and two pivoting bars (31,32; 41,42). For a combined X-Y adjustment two shifting bars (33,43), which are at right angles to each other, have to be connected by coupling bars (50,51), which each (51,50, respectively) move with the one shifting bar (33,43, respectively) in the one direction (X,Y, respectively), and pivot with regard to the one shifting bar (33,43 respectively) in the other direction (Y,X, respectively) in the same way as the pivoting bars (41,42 and 31,32, respectively) connected to the other shifting bar (43,33, respectively), a stabilizing bar (60) being parallel to one (51) of the coupling bars and forming with that coupling bar a bar parallelogram together with two other bars (57,63), one (63) of which is rigidly connected to the shifting bar (33), together with which the latter coupling bar (51) moves.