Sofa, armchair or similar article of furniture in a kit, and mounting method for such article

A kit for obtaining a module of a sofa, chair or armchair furniture article, comprising:

• a base with a seat extending over a geometric seating plane (XY), and
• a backrest or armrest component comprising a body defining an inner side adapted to face a user sitting on said seat, said base and said component being adapted to be mutually connected through mutual connection means arranged on at least a peripheral segment of said seat and on a corresponding lower side of said body,
• wherein said connection means comprise:
• a bar having a generally oval crosswise section, arranged along said peripheral segment of said seat, and exposed at an upper side, a lower side and an outer side, said section having a major axis (Z′) orthogonal or close to orthogonal with respect to said seating plane (XY);
• and
• a claw arrangement comprising:
• a tubular member arranged along said lower side of said body, having a C-shaped crosswise section, forming a bore opened through a slit at an inner side, said crosswise section being generally oval to substantially match the section of said bar at least over said upper, outer and lower sides, and
• a wing projecting inwards from a lower side of said tubular member;
• said tubular member being configured in an elastically deformable fashion;
• whereby said component is adapted to be mounted on said base by first setting said inner side close to said seat and housing said bar inside the bore of said tubular member through said slit, and then by rotating the component to a mounting position in which a tight coupling between the bore and the bar is obtained, causing the two respective oval sections to match, and said wing abuts against a lower face of said seat.