Divan-bed which can be converted via operating means of the continuous-balancing type and with variation of the height of the seat

A divan-bed comprising:

• a fixed frame including a pair of longitudinal parallel rails resting on the floor;
• a pair of rigidly interconnected carriages movable along said rails in a horizontal plane between opposite extreme positions of the carriages;
• a seat mounted on said carriages and displaceable therewith in said horizontal plane;
• a backrest operatively connected with said seat and mounted pivotally about a first axis extending perpendicular to said rails on said frame upon displacement of said carriages between said extreme positions of the carriages which correspond respectively to a fully extended position of the divan-bed in which said seat and backrest lie in said horizontal plane and a folded position, each of the carriages being formed with:
• a respective shaped lever pivotal about a respective axis parallel to said first axis and formed with a one end rotationally connected with the seat and the opposite end,
• a respective first rod rotatably connecting said opposite end of the shaped lever and the backrest,
• respective adjusting means for applying a plurality of relative angular positions between said seat and backrest while said carriages moving between said fully extended and folded positions of the divan-bed, and
• respective locking means for fixing each of said angular positions.