Height adjustment in front of the direction and a chair with such a height adjustment in front of the direction of

摘要

Height adjustment in front of the direction (1) for a chair, in particular a rotatable chair or an office - a chair, comprising:a pneumatic spring (5), which can be coupled with a seat of the chair is to adjust the height of the seat;a first guide tube means (8), in which the pneumatic spring (5) is guided displaceably in the longitudinal direction, wherein the first guide tube means (8) with an intermediate tubular member (15) is connected as a carrier, and wherein the first guide tube means (8) is made of plastic, and with guide rings (14) for the guidance of the pneumatic spring (5) is provided.