Height adjustment device for table or chair, comprising inner and outer profile with specifically shaped locking facility for precise action

摘要

An inner profile (2) can be moved vertically inside an outer profile (1), which is equipped with a locking unit (3), operated with a lever (3.1) and a locking element (4). The locking element (4), which is either cylindrically- or ball-shaped, can be engaged with matching recesses (2.1), positioned vertically along the surface of the inner profile (2). A gap (5), tapering towards the top and located at the upper end of the locking area (2.1), ensures a precise locking action.