Abstract: A synchronous office chair comprising a support (1) firmly connected with a supporting column, a seat base (2) articulated on a tilting axis (4) support with a flange (5) and a backrest (3) with a back bracket (6). The back bracket (6) features a first, second and third cam tracks (7, 8, and 9) and engages in an interstice between support (1) and seat base (2). Said seat base (2) with flange (5) and backrest (3) with back bracket (6) are formed to execute a synchronous movement. A first roller bearing (10) is mounted on flange (5) of seat base (2) that engages in the first cam track (7) of back bracket (6) and in which the synchronous movement is guided in first cam track (7). A second roller bearing 11 is mounted on seat base (2) that engages in second cam track (8) of back bracket (6) and in which synchronous movement is guided in second cam track (8).

Abstract: A synchronous office chair comprising a support (1) firmly connected with a supporting column, a seat base (2) articulated on a tilting axis (4) support with a flange (5) and a backrest (3) with a back bracket (6). The back bracket (6) features a first, second and third cam tracks (7, 8, and 9) and engages in an interstice between support (1) and seat base (2). Said seat base (2) with flange (5) and backrest (3) with back bracket (6) are formed to execute a synchronous movement. A first roller bearing (10) is mounted on flange (5) of seat base (2) that engages in the first cam track (7) of back bracket (6) and in which the synchronous movement is guided in first cam track (7). A second roller bearing 11 is mounted on seat base (2) that engages in second cam track (8) of back bracket (6) and in which synchronous movement is guided in second cam track (8).

Abstract: An assembly fitting has a first fitting part (1), which is provided for attachment to a first component, and a second fitting part (10), which is provided for attachment to a second component. The first fitting part (1) and the second fitting part (10) can be connected to one another by means of a bayonet coupling, whereby a sleeve part (2) of the bayonet coupling is formed in the first fitting part (1) and an insertion part (11) of the bayonet coupling is formed in the second fitting part (10). The insertion part (11) has a number of radial tongues (12). The sleeve part (2) has an inner sleeve opening (4) and tongue openings (5) radially formed thereon, corresponding to the number of tongues (12). Each radial tongue (12) has at least one lug (13), whose outer radial distance from a center of the insertion part (14) essentially lies on a circle and the shape of the inner sleeve opening (4) corresponds essentially at least in part to this circle.