초록 ▼

In the swivel chair, a seat frame and a backrest frame are joined by articulation and movable with a rocking motion synchronously against spring force, and the tilt of seat and backrest can be locked in several positions. The entire mechanical system for the tripping, adjustment, and locking of the

In the swivel chair, a seat frame and a backrest frame are joined by articulation and movable with a rocking motion synchronously against spring force, and the tilt of seat and backrest can be locked in several positions. The entire mechanical system for the tripping, adjustment, and locking of the tilt of seat frame and backrest frame, for triggering the height adjustment, and for setting the rocking spring force is accommodated in a supporting tube that is bent at an obtuse angle. This supporting tube surrounds in a rotatable and displaceable fashion a base tube at the lower end, this base tube being seated on a compound base and accommodating the gas-pressure spring, and is connected at the upper end with a horizontal transverse tube extending perpendicularly to the supporting tube, this transverse tube housing the swivel axles of the seat frame as well as of the backrest frame. The pivot axle of the backrest frame is constituted by two torsion springs which are respectively fixed with a longer, angled spring leg within a tube of the bottom part of the backrest frame and are in contact, with a shorter spring leg, against an adjustably designed abutment in the upper end of the supporting tube.

대표청구항 ▼

Height-adjustable swivel chair equipped a gas-pressure spring, especially office chair or office armchair, wherein a seat frame and a backrest frame are joined with articulation and being movable with a rocking motion synchronously against spring force, and the tilt of seat and backrest can be locke

Height-adjustable swivel chair equipped a gas-pressure spring, especially office chair or office armchair, wherein a seat frame and a backrest frame are joined with articulation and being movable with a rocking motion synchronously against spring force, and the tilt of seat and backrest can be locked in several positions, characterized by the following features: (a) the entire mechanism for the releasing, adjusting, and locking in place of the tilt of the seat frame (17) and the backrest frame (18), for tripping the height adjustment, and for adjusting the rocking spring force is accommodated in a supporting tube (3) bent at an obtuse angle, this supporting tube surrounding at the bottom end in a rotatable and displaceable fashion a base tube (2) mounted on a compound base (1) and accommodating the gas-pressure spring (6), and being connected at the upper end with a horizontal transverse tube (13) extending transversely to this supporting tube, this transverse tube housing the swivel axles of the seat frame (17) as well as of the backrest frame (18); (b) the swivel axle of the backrest frame (18) is constituted by two torsion springs (39), each of which is fixed in place, with a longer, angled spring leg (40), in a tube of the bottom portion of the backrest frame (18) and is in contact, with a shorter spring leg (43), with an adjustably designed stop block (44) in the upper end of the supporting tube (3).