Office chair, has armrest connected to anterior end of pair of coupling knobs, where one knob releases movement of plane and inclination of backrest, while another knob blocks movement and inclination

摘要

The chair has a movable base in the shape of a launching pad to draw an adjustable column supporting the plane of a seat and a backrest. An armrest (3) is connected to an anterior end of a pair of coupling knobs. One knob releases the movement of the plane and the inclination of the backrest. Another knob, adjacent to the former knob, blocks the movement and the inclination of the backrest.