Upholstered-furniture arrangement with upholstery-firmness adjustment, and use thereof

An upholstered furniture device with a base frame and a seat/reclining cushion which is fixed thereto at least in the edge region and which, for the purpose of adjusting the hardness of the cushion, is engaged underneath by a plate which is arranged in the base frame so as to be pivotably adjustable in height, in that the plate is articulated in the base frame so as to be pivotable on one side about a horizontal pivot axis, wherein an elevation attachment body is provided on the plate projecting on the upper side, which elevation attachment body engages under the seat/lounger cushion or ends at a defined distance thereunder, wherein the elevation attachment body limits the pushing-through of the seat/lounger cushion or compresses the seat/lounger cushion against a fixed and tensioned cover of the seat/lounger cushion in accordance with the height adjustment height of the plate;

• wherein the plate is arranged with its end opposite the pivot axis exposed in the base frame, and in that a height adjustment device acts on the plate from below with an adjustable pressure/pretensioning force, the height adjustment device being supported downwards in the base frame against the pressure/pretensioning force;
• wherein the upholstered furniture device includes a swivel kinematic system, which can be actuated by means of a screw manipulator, for providing a hardness setting for the upholstered furniture device and wherein the screw manipulator is coupled to a transverse beam, which is supported on the lateral plan of a base frame of the upholstered furniture device, for exerting an upwardly directed pressure/pretensioning force;
• and
• wherein the height adjustment device defines a lever with respect to the pivot axis which is smaller in length than the corresponding extension of the plate, in particular 1-65% smaller.