A collapsible peripheral frame includes first and second outer lateral bar units, and first and second longitudinal bar assemblies. Each of first and second longitudinal bar assemblies comprises first, second and third longitudinal bar units rotatably connected with each other at their adjacent ends. The first outer lateral bar unit has a first end connected with an end of the first longitudinal bar unit in the first longitudinal bar assembly and a second end rotatably connected with an end of the third longitudinal bar unit in the second longitudinal bar assembly. The second outer lateral bar unit has a first end rotatably connected with an end of the third longitudinal bar unit in the first longitudinal bar assembly and a second end connected with an end of the first longitudinal bar unit in the second longitudinal bar assembly.

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.

Disclosed are connectors and collapsible bed frames. A collapsible bed frame includes lateral and longitudinal bar units. Between each of two adjacent lateral bar units, a first longitudinal bar unit is disposed at a first side of the collapsible bed frame and a second longitudinal bar unit is disposed at a second side of the collapsible bed frame. The first and second longitudinal bar units and the two adjacent lateral bar units are rotatably connected with each other by connectors that enable the collapsible bed frame to contract and expand while the lateral and longitudinal bar units are connected with each other.

Disclosed are collapsible beds and bed frames. A collapsible bed frame includes first and frame units disposed side by side and connected with each other at their proximal sides. Each of the first and second frame units comprises a plurality of bar units. Adjacent bar units are connected with each other and rotatable with respect to each other along one or more axes each substantially perpendicular to a first plane defined by a top surface of the collapsible bed frame when it is expanded. The first and second frame units can contract and expand while remaining on the first plane and while connected with each other.

Disclosed are connectors and collapsible bed frames. A collapsible bed frame includes lateral and longitudinal bar units. Between each of two adjacent lateral bar units, a first longitudinal bar unit is disposed at a first side of the collapsible bed frame and a second longitudinal bar unit is disposed at a second side of the collapsible bed frame. The first and second longitudinal bar units and the two adjacent lateral bar units are rotatably connected with each other by connectors that enable the collapsible bed frame to contract and expand while the lateral and longitudinal bar units are connected with each other.

A collapsible bed frame includes a first lateral bar unit, a second lateral bar unit, and a longitudinal supporting bar unit. The first and second lateral bar units are disposed substantially parallel to each other. The first lateral bar unit includes a first coupler to removably couple with a first end of the longitudinal supporting bar unit. The second lateral bar unit includes a second coupler to removably couple with a second end of the longitudinal supporting bar unit. The collapsible bed frame also includes first and second longitudinal bar units. The first longitudinal bar unit is rotatably connected with the first ends of the first and second lateral bar units. The second longitudinal bar unit is rotatably connected with the second ends of the first and second lateral bar units.

A collapsible bed frame includes a plurality of lateral bar units, a plurality of first longitudinal bar units, and a plurality of second longitudinal bar units. The plurality of lateral bar units includes first and second outer lateral bar units and at least one inner lateral bar unit. A collapsible bed frame also includes a plurality of first connectors, each having a body and a supporting piece. The body is fixedly connected with an end of the first or second outer lateral bar unit, and the supporting piece is rotatably connected with an adjacent first or second longitudinal bar unit. The collapsible bed frame can contract and expand while the lateral and longitudinal bar units are connected with each other.

Disclosed are connectors and collapsible bed frames. A collapsible bed frame includes first and second frame units disposed side by side. Each of the first and second frame units comprises a plurality of bar units with adjacent bar units rotatably connected with each other. A collapsible bed frame also includes an inner lateral bar unit disposed between the first and second frame units, and rotatably connected with the first and second frame units. During contraction and expansion, the first frame unit, the second frame unit and the inner lateral bar unit remain substantially on a first plane defined by a top surface of the collapsible bed frame when it is expanded.

The ultra-thin foldable bed frame includes a front frame and a rear frame that are rotatably connected to each other, a front push rod assembly and a rear push rod assembly respectively disposed on the front frame and the rear frame, a front bed board assembly and a rear bed board assembly respectively laid on the front push rod assembly and the rear push rod assembly, a front frame driving motor, and a rear frame driving motor. The front push rod assembly and the rear push rod assembly are respectively connected to the front frame driving motor and the rear frame driving motor. When the driving motors are at the initial position, the front frame, the rear frame, the push rod assemblies, and the driving motors are all fall within the range of the thicknesses of the front frame and the rear frame.

A mattress foundation includes a top frame and a bottom frame. Bracket assemblies are between the top frame and the bottom frame. The bottom frame has a first bottom segment and a second bottom segment each rotatably connected to bracket assemblies. The top frame has a first top segment and the second top segment each rotatably connected to bracket assemblies. The first bottom segment, the second bottom segment, the first top segment, and the second top segment are rotatable relative to each other and the bracket assemblies between a folded position and an unfolded position.