Apparatus comprising a wall frame and an application frame, wherein the application frame is movable with respect to the wall frame

An apparatus (1) comprising a wall frame (2) and an application frame (3), wherein the application frame (3) is movable with 5 respect to the wall frame (2), said apparatus (1) further comprising a first spring system (4) and a second spring system (5), which two spring systems (4, 5) are each coupled with the wall frame (2) and the application frame (3) to apply forces on the application frame (3), wherein the first spring system (4) 10 has its opposite ends connected to the wall frame (2) and the application frame (3) respectively, and the second spring system (5) is at a first end (5') connected to the wall frame (2) and said second spring system (5) is at a second end (5") distant from the first end (5') connected to an adjusting device (6) 15 which is coupled with the application frame (3), said adjusting device (6) being arranged to vary an extension of the second spring system (5) when the application frame (3) moves with respect to the wall frame (2), which adjusting' device (6) comprises a single trajectory profile element (7), and only a 20 first arm (8) and a second arm (9) that are connected to each other at a first hinge (10), wherein an end (8') of the first arm (8) distant from the first hinge (10) is with a second hinge (11) connected to the application frame (3), and an end (9') of the second arm (9) distant from the first hinge (10) is with a 25 third hinge (12) connected to the second spring system (5), wherein the first hinge (10) that joins the first arm (8) and the second arm (9) is movably connected to and guided by the single trajectory profile element (7).