A mechanism for transforming furniture from a sitting position to a lying down position has right and left jacks with identical design, which are a mirror reflection of each other, connected by a synchronisation mechanism. Each jack has a fastening plate which attaches the jack to the furniture body, angle bars, upper and lower for connecting with the mattresses, a spring and a front pull rod and rear pull rod with centre arms. Each jack has a backrest driving sub-assembly created from a backrest rotation pull rod and support to be connected with the backrest of the furniture, whereas the backrest rotation pull rod is connected in an articulated manner on one end with the bottom end of the rear pull rod, and on the second end is connected in an articulated manner with the support connected in an articulated manner to the fastening plate.

A convertible sofa bed includes a U-shaped section having a first arm and a second arm; a first end section; a second end section; and first, second and third mattress sections; the first mattress section is rotatably joined to the second mattress section, which is rotatably joined to the third mattress section, which has a first bottom edge and an opposing second bottom edge; the first mattress section has an internal first edge and an opposing internal section edge; the internal first edge has a second portion of the first closure element, and the internal second edge has a second portion of the second closure element; the first closure element releasably joins the first end section and the first mattress section, and the second closure element releasably joins the second end section and the first mattress section.

A convertible sofa bed includes a U-shaped section having a first arm and a second arm; a first end section; a second end section; and first, second and third mattress sections; the first mattress section is rotatably joined to the second mattress section, which is rotatably joined to the third mattress section, which has a first bottom edge and an opposing second bottom edge; the first mattress section has an internal first edge and an opposing internal section edge; the internal first edge has a second portion of the first closure element, and the internal second edge has a second portion of the second closure element; the first closure element releasably joins the first end section and the first mattress section, and the second closure element releasably joins the second end section and the first mattress section.

A transformable piece of furniture transforms between a bed, a sofa and a desk. The furniture includes a bed frame pivotally mounted between a pair of frame members and movable between a horizontal bed orientation and a vertical orientation. A seat member is pivotally mounted to a desk member below the bed frame such that the seat member is exposed when the bed frame is vertically oriented. The desk member can be raised to desk height by raising it and flipping the seat member into a vertical orientation.

A transformable piece of furniture transforms between a bed, a sofa and a desk. The furniture includes a bed frame pivotally mounted between a pair of frame members and movable between a horizontal bed orientation and a vertical orientation. A seat member is pivotally mounted to a desk member below the bed frame such that the seat member is exposed when the bed frame is vertically oriented. The desk member can be raised to desk height by raising it and flipping the seat member into a vertical orientation.

An iron frame sofa with a foldable hinge structure, including a sofa mainframe with connecting square tubes mounted at the sofa mainframe. Supporting legs are mounted at the connecting square tubes. A grille supporting frame is mounted on the sofa mainframe. A first assembling pipe seat is mounted on the sofa mainframe. A first assembling pipe is sleeved with the first assembling pipe seat at the first assembling pipe seat. A second assembling pipe seat is mounted on the sofa mainframe. A second assembling pipe is sleeved with the second assembling pipe seat at the second assembling pipe seat. Folding hinges are mounted at the second and first assembling pipes. Foldable top bars are mounted on the foldable hinges.

An iron frame sofa with a foldable hinge structure, including a sofa mainframe with connecting square tubes mounted at the sofa mainframe. Supporting legs are mounted at the connecting square tubes. A grille supporting frame is mounted on the sofa mainframe. A first assembling pipe seat is mounted on the sofa mainframe. A first assembling pipe is sleeved with the first assembling pipe seat at the first assembling pipe seat. A second assembling pipe seat is mounted on the sofa mainframe. A second assembling pipe is sleeved with the second assembling pipe seat at the second assembling pipe seat. Folding hinges are mounted at the second and first assembling pipes. Foldable top bars are mounted on the foldable hinges.

A lift-lip bed structure comprising: a fixed frame (2); a pivoting frame (5) capable of supporting bedding, mounted pivoting about a transverse pivot axis (6) such that the pivoting frame can pivot between a horizontal position extending forwards and a rear vertical raised position; and a movable support (23) capable of supporting a seat, mounted movable on the fixed frame (2) such that the movable support (23) can be moved between a high advanced position and a low retracted position in which it is lower than in the high advanced position; the movable support (23), in the advanced position, extending at least partially forward of the pivoting frame (5), in the raised position, and the movable support (23), in the retracted position, extending at least partially below and at a distance from the pivoting frame (5), in the extended position.

A lift-lip bed structure comprising: a fixed frame (2); a pivoting frame (5) capable of supporting bedding, mounted pivoting about a transverse pivot axis (6) such that the pivoting frame can pivot between a horizontal position extending forwards and a rear vertical raised position; and a movable support (23) capable of supporting a seat, mounted movable on the fixed frame (2) such that the movable support (23) can be moved between a high advanced position and a low retracted position in which it is lower than in the high advanced position; the movable support (23), in the advanced position, extending at least partially forward of the pivoting frame (5), in the raised position, and the movable support (23), in the retracted position, extending at least partially below and at a distance from the pivoting frame (5), in the extended position.

A convertible golf cart seat assembly is disclosed. The convertible golf cart seat assembly includes a main seat frame attached to the existing golf cart structure, a plastic stationary cargo board supported by the main seat frame, a plastic flip board rotatably hinged to the main seat frame, and a seat with a plastic backer board attached to the flip board. The hinge between the flip board and the main seat frame includes flip board flanges on the flip board and cargo board flanges on the stationary cargo board that abut each other and provide strength to the cargo bed created by the stationary cargo board and the flip board.