| 摘要 |
A centering device, in particular for a tracer-type measuring instrument ( 1 ), is proposed. The centering device comprises an instrument carrier ( 3 ) defining an instrument axis ( 7 ), a carrying shank ( 41 ) defining a shank axis ( 43 ) and a centering holder ( 45 ) holding the instrument carrier ( 3 ), with the instrument axis ( 7 ) parallel to the shank axis ( 43 ), radially movably to the latter, but so as to be capable of being fixed to the carrying shank ( 41 ). The centering holder ( 45 ) is designed as a parallelogram guide with a parallelogram-link region ( 59 ), or a plurality of these regions, distributed about the shank axis ( 43 ) and the instrument axis ( 47 ) and extending along these axes ( 7, 43 ). Such a parallelogram guide may be integrally formed in one piece on the carrying shank ( 41 ) and/or on the instrument carrier ( 3 ), thus reducing the outlay in terms of production. Setscrews ( 69 ) distributed on the circumference of the parallelogram guide make it possible to adjust the shank axis ( 43 ) in relation to the instrument axis ( 7 ).
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