An adjustable bed frame structure includes a bed frame and bed legs. The bed frame includes a left side rod and a right side rod. A head support rod, a middle support rod and a tail support rod are connected between the left side rod and the right side rod. The head support rod, the middle support rod and the tail support rod each include a left support rod and a right support rod. The left support rod and the right support rod each have a plurality of adjustment holes. The bed legs include side legs and middle legs. Each of the middle legs has a locking portion at a top thereof to mate with the adjustment holes of the left support rod and the right support rod. The width of the bed frame can be adjusted as desired.

An adjustable bed frame structure includes a bed frame and bed legs. The bed frame includes a left side rod and a right side rod. A head support rod, a middle support rod and a tail support rod are connected between the left side rod and the right side rod. The head support rod, the middle support rod and the tail support rod each include a left support rod and a right support rod. The left support rod and the right support rod each have a plurality of adjustment holes. The bed legs include side legs and middle legs. Each of the middle legs has a locking portion at a top thereof to mate with the adjustment holes of the left support rod and the right support rod. The width of the bed frame can be adjusted as desired.

A bed includes a bed frame and a backrest coupled with the bed frame by a plurality of connecting units, each including first and second plate. The first plate is fixedly disposed at a first side of the bed frame and includes one or more slots elongated in the lateral direction of the bed frame. The second plate includes one or more rows of holes, and is fixedly coupled with the first plate by at least one fastener through at least one slot of the first plate and at least one hole of the second plate. Each connecting unit also includes one or more locking nuts fixedly disposed at the second plate, and one or more locking bolts. The one or more locking bolts pass through one or more holes or slots formed in the backrest and fixedly coupled with the one or more locking nuts of the second plate.

A bed includes a bed frame and a backrest coupled with the bed frame by a plurality of connecting units, each including first and second plate. The first plate is fixedly disposed at a first side of the bed frame and includes one or more slots elongated in the lateral direction of the bed frame. The second plate includes one or more rows of holes, and is fixedly coupled with the first plate by at least one fastener through at least one slot of the first plate and at least one hole of the second plate. Each connecting unit also includes one or more locking nuts fixedly disposed at the second plate, and one or more locking bolts. The one or more locking bolts pass through one or more holes or slots formed in the backrest and fixedly coupled with the one or more locking nuts of the second plate.

A bed frame includes a backrest, a bedstead and a plurality of connectors to couple the backrest with the bedstead. A connector includes first, second, third and fourth segments, in which each of the second, third, and fourth segments extends from a lower side of the first segment. A first slot is formed between the second and third segments to accommodate a bar of the backrest, and a second slot is formed between the third and fourth segments to accommodate a bar of the bedstead. When the bed frame is assembled, each connector in the plurality of connectors is fixedly coupled with the bar of the backrest, and snap-fitted on the bar of the bedstead.

A bed frame includes a backrest, a bedstead and a plurality of connectors to couple the backrest with the bedstead. A connector includes first, second, third and fourth segments, in which each of the second, third, and fourth segments extends from a lower side of the first segment. A first slot is formed between the second and third segments to accommodate a bar of the backrest, and a second slot is formed between the third and fourth segments to accommodate a bar of the bedstead. When the bed frame is assembled, each connector in the plurality of connectors is fixedly coupled with the bar of the backrest, and snap-fitted on the bar of the bedstead.

A ready-to-assemble mattress foundation including a plurality of rails forming a mattress foundation having a plurality of corners. The mattress foundation includes a plurality of corner connector assemblies coupling the rails together at the corners. Each of the corner connector assemblies includes a first corner bracket; a second corner bracket; a pin including internal threads and external threads; and a fastener threadably engaging the external threads of the pin to retain the pin relative to the corner brackets. The pin extends through the first apertures and the second apertures. The mattress foundation includes a plurality of central support assemblies coupled to one or more of the rails. Each of the central support assemblies includes a body having internal threads. The mattress foundation includes a plurality of legs each including a threaded rod and threadably received within the internal threads of the pin and the central support assemblies.

A ready-to-assemble mattress foundation including a plurality of rails forming a mattress foundation having a plurality of corners. The mattress foundation includes a plurality of corner connector assemblies coupling the rails together at the corners. Each of the corner connector assemblies includes a first corner bracket; a second corner bracket; a pin including internal threads and external threads; and a fastener threadably engaging the external threads of the pin to retain the pin relative to the corner brackets. The pin extends through the first apertures and the second apertures. The mattress foundation includes a plurality of central support assemblies coupled to one or more of the rails. Each of the central support assemblies includes a body having internal threads. The mattress foundation includes a plurality of legs each including a threaded rod and threadably received within the internal threads of the pin and the central support assemblies.

A bed frame includes outer lateral and longitudinal bar units, each having a first end and a second end. Each of first, second, third, and fourth longitudinal bar units includes an upper longitudinal bar and a lower longitudinal bar. The first ends of the first and second longitudinal bar units are rotatably connected with each other. The first ends of the third and fourth longitudinal bar units are rotatably connected with each other. Of each respective longitudinal bar unit, the second end of the upper longitudinal bar is movably connected with the first or second end of a corresponding lateral bar unit, and the second end of the lower longitudinal bar is fixedly connected with the first or second end of the corresponding lateral bar unit.

A bed can include one or more connectors for connecting components of the bed. For example, a frame can include a fastening mechanism for releasably connecting a cross-member to a longitudinal support. Another example includes connectors for connecting and aligning a foundation with a frame.