Sofa bed has a seat, back rest and foot rest connected by levers allowing foot rest to be extended or sofa converted to bed, stay connected to lever system preventing sofa from tipping in extended positions

摘要

The sofa bed has a seat (1), back rest (2) and foot rest (3) which are connected by a lever system (6 -8) allowing the foot rest to be extended without lowering the back rest or all three components to be extended to form a bed. A stay (18) is connected to a positioning lever (21) forming part of the lever system and rests on the floor to prevent the sofa bed from tipping in the extended positions.