Folding rule for measuring desired length, has set of inner folding rule units coupled one behind other so that size is determined by angles, where one of units has slider adjustably supported parallel to longitudinal direction of units

摘要

The rule has a set of inner folding rule units (2, 3) coupled one behind other so that size is determined by angles, where one of the units has a slider adjustably supported parallel to a longitudinal direction of the units. An oblong recess (22) is implemented in the unit, where the recess carries the slider so that the slider is lengthwise-adjustably supported in the recess, and the recess and the slider exhibit a dove tail-like cross section. The units are foldably connected with one another by hinges forming a package (100).