Chair, in particular office swivel chair, but also chair for children and adolescents

摘要

The office chair with support column (10) and back part (13) has the front of the seat part (12) movable mounted to a carrying unit (11). A double hinge spring (14) is positioned between seat part (12) and carrying element (11) acting on a wedge-shaped element (16) operated by a bevel gear (17). When the hinge spring (14) is tensioned the distance between carrying element (11) and seat part (12) is changed. The tension of the spring (14) can be manually adjusted with a hand wheel (20).