A flexible and portable sofa bed comprises a cushion assembly and a support frame; the cushion assembly is provided with a front cushion, a center cushion and a back cushion along the longitudinal direction, one ends of the front cushion and the center cushion are foldable connected, and the back cushion can be independently turned relative to the center cushion; the center cushion is connected with the support frame in a sliding way, and the back cushion is connected with the support frame in a rotating way. The movable connection of the cushion assembly and the support frame enables the sofa bed to change its working state.

An offset hinge for a foldable bed, including a flexible connector connected between a first section and a second section of the foldable bed with the flexible connector being connected to the second section at a connection point on a surface of the second section that is offset a distance from an edge of the second section.