SUPPORTING STRUCTURE FOR A SEAT

Support structure (2) for a seat, comprising:- an upper element (4) that is intended to constitute or to be bound to a seat,- a lower support element (6) which is associated with an upright (10) for supporting said seat, said upright (10) being of a telescopic type (11, 13) and being provided with means for adjusting its height and a device (36) for the control of said adjusting means,- at least one elastic element (20), which is interposed between the lower surface (7) of said upper element (4) and said lower support element (6), said at least one elastic element (20) constitutes the only sustaining element of said upper element with respect to said lower support element (6), so as to allow both the inclination and the translation of said upper element (4) with respect to a substantially vertical axis (9),and characterized in that it comprises an inner collar (40) which is fitted around said upright (10) and which defines an actuating lever, with substantially annular development, cooperating with a member (34) acting on said control device (36) of said means for adjusting the height of said upright (10).