Guide means for telescoping cylindrical parts and a column unit comprising such guide means

摘要

According to an illustrative example, a gas spring (8) is provided within a base tube (9) of a chair column. The piston rod (8-2) of the gas spring (8) is axially supported on a bottom (22) of the base tube (9). The cylinder (8-1) of the gas spring (8) is axially and rotatably guided within a guide (1) at the upper end of the base tube (9). The guide (1) comprises a main sleeve body (2) and a guiding sleeve body (3a) inserted into a central passage of the main sleeve body (2). These sleeves are provided on their surfaces facing each other with at least one projection, and/or at least one recess which engage each other in a snap fit.