An armrest mechanism of a foldable sofa includes an outer support plate, an inner bracing plate, and a driving rod. The outer support plate and the inner bracing plate are respectively arranged at two sides of the driving rod. Multiple groups of crank rod assemblies are arranged on the driving rod, and the driving rod is individually hinged with the outer support plate and the inner bracing plate through the crank rod assemblies. Each crank rod assembly includes a first rod and a second rod. An end of the first rod is hinged with the inner bracing plate and the other end is hinged with the driving rod. An end of the second rod is hinged with the outer support plate and the other end is hinged with the driving rod. A gear structure is engaged between the first rod and the second rod.

A bed frame that can be assembled without the use of tools. The bed frame can also be easily collapsed into a relatively compact package since the normal long side rails are comprised of two components that can be manipulated such that the two components can be in an end to end orientation when the side rails used in a bed frame or in a generally side by side orientation to facilitate shipping and storage. The cross rails can also be formed of two components that can be moved between an end to end orientation and a generally parallel orientation. A locking system locks certain of the components into a fixed position when in the end to end orientation.

A width-adjustable foldable bed includes a main bed frame unit that includes a first bed frame subunit and a second bed frame subunit. The second bed frame subunit is pivotable relative to the first bed frame subunit to fold the main bed frame unit from a bed flat state, where the first bed frame subunit and the second bed frame subunit are arranged in a lengthwise direction, to a bed folded state, where the first bed frame subunit is stacked on top of the second bed frame subunit. Two lateral bed frame units are connected to two lateral sides of the first bed frame subunit and the second bed frame subunit. A backrest actuating device is connected to the first bed frame subunit, and is operable for driving the first bed frame subunit to switch between a first flat state and a first bent state.

A folding bed with stretchable supporting legs is provided, which belongs to the technical field of folding beds. The folding bed includes a folding bed plate and bed leg assemblies. Two opposite sides of the folding bed plate are hinged with expansion bed plates. The bed leg assemblies are arranged at two ends of a bottom of the folding bed plate, and adjustment rods are slidably plugged into the two ends. One end of each adjustment rod away from a square tube is fixedly provided with a supporting leg through a bolt. A U-shaped elastic sheet is arranged inside each adjustment rod. Fixed ends of the U-shaped elastic sheets are fixedly connected to inner walls of the adjustment rods. Clamping heads are formed at movable ends of the U-shaped elastic sheets. A plurality of adjustment holes are provided in one side of the square tube.

A width-adjustable foldable bed includes a main bed frame unit that includes a first bed frame subunit and a second bed frame subunit. The second bed frame subunit is pivotable relative to the first bed frame subunit to fold the main bed frame unit from a bed flat state, where the first bed frame subunit and the second bed frame subunit are arranged in a lengthwise direction, to a bed folded state, where the first bed frame subunit is stacked on top of the second bed frame subunit. Two lateral bed frame units are connected to two lateral sides of the first bed frame subunit and the second bed frame subunit. A backrest actuating device is connected to the first bed frame subunit, and is operable for driving the first bed frame subunit to switch between a first flat state and a first bent state.