초록 ▼

A chair (1), in particular a swivel office chair, is provided with a bottom chair part (2) having a column (3), a seat support (4) held on the bottom chair part (2), a seat (6) connected pivotably to the support, and a backrest support (5) holding a backrest (7) and connected pivotably to the seat s

A chair (1), in particular a swivel office chair, is provided with a bottom chair part (2) having a column (3), a seat support (4) held on the bottom chair part (2), a seat (6) connected pivotably to the support, and a backrest support (5) holding a backrest (7) and connected pivotably to the seat support (4). The movement of the seat (6) is coupled with the movement of the backrest support (5) by a synchronizing mechanism having at least one spring (10) and coupling elements. The synchronizing mechanism is arranged essentially within the column (3).

대표청구항 ▼

The invention claimed is: 1. A chair (1), comprising a bottom chair part (2) having a column (3), with a seat support (4) held on the bottom chair part (2), a seat (6) connected pivotably to the seat support (4), and a backrest support (5) holding a backrest (7) and connected pivotably to the seat

The invention claimed is: 1. A chair (1), comprising a bottom chair part (2) having a column (3), with a seat support (4) held on the bottom chair part (2), a seat (6) connected pivotably to the seat support (4), and a backrest support (5) holding a backrest (7) and connected pivotably to the seat support (4), wherein movement of the seat (6) is coupled to movement of the backrest support (5) by a synchronizing mechanism having at least one spring device (10) and coupling elements, movement of the coupling elements of the synchronizing mechanism relative to each other can be blocked by a locking device (25), the locking device (25) is adjustable between a released position and a locked position, the synchronizing mechanism is located essentially within the column (3), a column base (19a) is connected to a lower column part (14a) of the column (3) and also to a spring element arranged in the lower column part (14a) formed by a gas spring (32), for adjusting seat height, and an upper column part (13a) that is connected to the seat support (4) is provided with the at least one spring device located therein, which is supported on a bottom side by a thrust support (16a) connected to a piston rod of the gas spring (32), the piston rod of the gas spring (32) comprises, on a top end thereof, a threaded bolt (18a) or is connected to a threaded bolt (18a) and the thrust support (16a) for the spring has a threaded bore hole (17a) screwed onto the threaded bolt (18a) for adjustment of the spring bias of the at least one spring device (10), and receives force on a toy side from the backrest support (7), via a plunger (12), and the upper column part (13a) extends telescopically at least partially into an inner cavity of the lower column part (14a). 2. The chair according to claim 1, wherein the coupling elements includes a sleeve-shaped end (11) of the seat support (4) engaging in a top end of the column (3), a plunger (12) receiving force from the backrest support (5) and projecting through the sleeve-shaped end (11) of the seat support (4), and a connection element (31) connecting the seat (6) and the backrest support (5) located at a distance to a pivot bearing (8) that pivotally connects the seat support (4) and the backrest support (5) in an articulated way, and the synchronizing spring device (10) receives force from the plunger (12) and the lower free end (11) of the seat support (4) engaging in the column (3). 3. The chair according to claim 1, wherein the synchronizing spring device (10) has at least one spring element supported on a thrust support. 4. The chair according to claim 1, wherein the spring element comprises at least one of a coil spring (15), a torsion spring, a plastic spring, or a gas spring. 5. The chair according to claim 1, wherein the column (3) comprises an upper column part (13) with the spring device (10) that is adjustable and a lower column part (14) arranged coaxial to the upper column part with a height adjustment, the two column parts (13, 14) are connected to each other so that they can be adjusted relative to each other, and rotating of the upper column part (13) relative to the lower column part (14) can be blocked by a locking device (22) for height adjustment and can be released for adjusting a spring biasing. 6. The chair according to claim 5, wherein the spring device (10) comprises a coil spring (15) arranged between the coupling element and a thrust support, the thrust support is locked in rotation with the upper column part (13) and has a threaded bore hole (17), in which a threaded bolt (18) locked in rotation with the lower column part (14) engages. 7. A chair (1), comprising a bottom chair part (2) having a column (3), with a seat support (4) held on the bottom chair part (2), a seat (6) connected pivotably to the seat support (4), and a backrest support (5) holding a backrest (7) and connected pivotably to the seat support (4), movement of the seat (6) is coupled to movement of the backrest support (5) by a synchronizing mechanism having at least one spring device (10) and coupling elements, the synchronizing mechanism is generally located within the column (3), the column (3) comprises an upper column part (13) with the spring device (10) that is adjustable and a lower column part (14) arranged coaxial to the upper column part with a height adjustment, the two column parts (13, 14) are connected to each other so that they can be adjusted relative to each other, and rotating of the upper column part (13) relative to the lower column part (14) can be blocked by a locking device (22) for height adjustment and can be released for adjusting a spring biasing, the chair (1) has a column base (19), which extends at least partially into the lower column part (14) and has a threaded rod (20) on a top end of the column base, and a threaded nut (21) locked in rotation with the lower column part (14) is screwed onto the threaded rod (20) for adjusting the height of the chair (1). 8. The chair according to claim 3, wherein the thrust support for the spring element comprises a spring plate (16). 9. The chair according to claim 1, wherein the thrust support for the spring (15) comprises a spring plate (16a) arranged downwards relative to a screw connection thereof with the threaded bolt (18a). 10. The chair of claim 3, wherein the thrust support is adjustable.