Foldable sofa bed

A foldable sofa bed, comprising a sofa frame, a foldable bed frame and at least one folding support assembly;

• wherein the foldable bed frame comprises a first folding frame and a second folding frame, and the at least one folding support assembly is mounted at a location where the first folding frame and the second folding frame are connected;
• each side of the sofa frame is provided with a rotary connector configured for connecting the first folding frame, and the first folding frame is capable to be unfolded towards a front of the sofa frame;
• the at least one folding support assembly comprises a U-shaped connector and a first support leg, an end of the first support leg is fixed vertically to the U-shaped connector;
• a first connecting rod is provided between the rotary connector and the first support leg, with one end of the first connecting rod being mounted on an inner side of the rotary connector and another end of the first connecting rod being mounted on an outer side of the first support leg;
• the second folding frame is assembled with two second support legs, and the second folding frame and each second support leg are connected by a fixing connection assembly;
• the fixing connection assembly comprises a fixing member and a rotary member, the fixing member is fixed to an inner side of the second folding frame, the rotary member is fixed to an end of a corresponding second support leg, and the rotary member is rotationally connected with the fixing member;
• a second connecting rod is assembled between the first support leg and a corresponding second support leg, and both ends of the second connecting rod are mounted on inner sides of the first support leg and the corresponding second support leg;
• the U-shaped connector is assembled with a plurality of rotary connecting columns at both ends of the U-shaped connector, the plurality of rotary connecting columns are configured for fixing the first folding frame and the U-shaped connector, and for fixing the second folding frame and the U-shaped connector;
• the first folding frame and the second folding frame is rotatable around the rotary connecting column towards the opening of the U-shaped connector, to achieve the rotational folding of the first folding frame and the second folding frame;
• the first folding frame rotates toward the top of the sofa frame through the rotating connector, and the first connecting rod drives the first support leg rotates, such that the sofa frame is folded together with the first support frame, and the first support leg drives the second support leg connected to the second connecting rod, such that the second support leg, the first support frame, and the second support frame are folded together to complete the folding, the foldable bed frame is in a folded state, the second folding frame is provided over the first folding frame, and the first support leg and the second support leg are in the same plane;
• the first support leg and the second support leg is used to ensure that the entire foldable sofa bed is parallel to a ground when the foldable bed frame is unfolded.