An adjustable seat system transformable from a first, bench seat orientation to a second, lay-flat bed orientation, to a third, raised bed orientation, to a lounge orientation there between. The system includes a seat, a seat back, a foot rest with a foot rest cushion, and a bed cushion stored behind the seat back when in the first, bench seat orientation. The foot rest can be independently raised and lowered as desired. When the bed cushion is moved from a stored position to a horizontal position, the seat, seat back, and foot rest elements are moved away from the bed cushion and can be oriented into a horizontal position to form the second, lay-flat bed orientation. A pair of adjustable seat systems can be deployed together and separately and autonomously controlled. The pair of adjustable seat systems can be moved apart and rotated to be oriented about an optional dinette.

An adjustable seat system transformable from a first, bench seat orientation to a second, lay-flat bed orientation, to a third, raised bed orientation, to a lounge orientation there between. The system includes a seat, a seat back, a foot rest with a foot rest cushion, and a bed cushion stored behind the seat back when in the first, bench seat orientation. The foot rest can be independently raised and lowered as desired. When the bed cushion is moved from a stored position to a horizontal position, the seat, seat back, and foot rest elements are moved away from the bed cushion and can be oriented into a horizontal position to form the second, lay-flat bed orientation. A pair of adjustable seat systems can be deployed together and separately and autonomously controlled. The pair of adjustable seat systems can be moved apart and rotated to be oriented about an optional dinette.

A single folding sofa bedstead includes a bedstead frame body, a frame assembly, a first connecting rod assembly, a second connecting rod assembly, a first linkage rod group, and a second linkage rod group. The frame assembly has a first frame, a second frame, and a third frame. The first frame is pivotally connected to one side of the second frame, and the third frame is pivotally connected to the other side of the second frame. One end of the first connecting rod assembly is pivotally connected to the first frame, and the other end of the first connecting rod assembly is pivotally connected to the bedstead frame body. One end of the second connecting rod assembly is pivotally connected to the second frame, and the other end of the second connecting rod assembly is pivotally connected to the bedstead frame body.

A single folding sofa bedstead includes a bedstead frame body, a frame assembly, a first connecting rod assembly, a second connecting rod assembly, a first linkage rod group, and a second linkage rod group. The frame assembly has a first frame, a second frame, and a third frame. The first frame is pivotally connected to one side of the second frame, and the third frame is pivotally connected to the other side of the second frame. One end of the first connecting rod assembly is pivotally connected to the first frame, and the other end of the first connecting rod assembly is pivotally connected to the bedstead frame body. One end of the second connecting rod assembly is pivotally connected to the second frame, and the other end of the second connecting rod assembly is pivotally connected to the bedstead frame body.