La presente invenzione si riferisce ad un divano letto con apertura facilitata, in particolare azionamento automatico, comprendente un telaio fisso (2) definente un vano (7) per ricevere un materasso (8) che può essere ripiegato in almeno quattro porzioni e è supportato da almeno quattro telai mobili (9, 10, 11, 12), uno per ogni parte del materasso (8), il primo telaio mobile (9) essendo associato al telaio fisso (2); quattro telai mobili (9, 10, 11, 12) sono sequenzialmente incernierati tra loro per definire una catena cinematica, con un grado di libertà, che è mobile fra una configurazione chiusa, in cui i quattro telai mobili (9, 10, 11, 12) sono sostanzialmente contrapposti a coppie in modo da definire una struttura a forma di gabbia che circonda il materasso (8) piegato almeno in quattro parti, ed una configurazione aperta, in cui i quattro telai mobili (9, 10, 11, 12) sono sostanzialmente allineati tra loro per definire una superficie di appoggio su cui si estende il materasso (8) spiegato.

A sofa bed (1a, 1b) with facilitated opening, particularly with automatic actuation, comprising a fixed framework (2) which defines a compartment (7) for accommodating a mattress (8) that can fold into at least four parts and is supported by at least four movable frames (9, 10, 11, 12), one for each one of the parts of the mattress (8), the first movable frame (9) being associated with the fixed framework (2); the four movable frames (9, 10, 11, 12) are mutually articulated sequentially with respect to each other to define a kinematic chain, with one degree of freedom, which can move between a closed configuration, in which the four movable frames (9, 10, 11, 12) are substantially mutually opposite in pairs so as to define a cagelike structure that encloses the mattress (8) folded into at least four parts, and an open configuration, in which the four movable frames (9, 10, 11, 12) are substantially mutually aligned to define a resting surface on which the unfolded mattress (8) lies.

A structural framework for a convertible armchair or sofa comprising a box-shaped base supporting a plurality of frames hinged to one another, including a particular frame suitable, alone, for directly or indirectly supporting a seat cushion on one of its sides and, in combination with the other frames, for supporting a mattress on its other side, and mechanisms for the displacement of said frames and of a backrest and supporting foot, in relation to one another and with respect to the base, between: a stable configuration as a sofa or armchair, wherein the frames remain inside said base, where they identify a cavity for containing the folded mattress;; and a stable configuration as a bed wherein the frames extend forwards, becoming aligned to define a horizontal resting surface that extends beyond the base and is supported by the foot, while the backrest moves underneath the resting surface, and a stable configuration as a recliner, wherein, by comparison with the configuration as an armchair or sofa, the backrest is tilted further backwards and the particular frame extends further forwards and/or is tilted upwards.