The disclosure generally relates to an adjustable foundation or bed, in particular having a tri-fold adjustable foundation. Three segments of the adjustable foundation, including a mattress support surface with three deck support sections and a subframe with three longitudinal support sections, are foldable/rotatable around two opposing pivot axes such that the three segments can be positioned in a folded, overlapping configuration that is convenient for shipping/transportation, having substantially smaller maximum dimensions than the adjustable foundation in a flat, non-folded configuration. The folded adjustable foundation can be conveniently unfolded and locked into a flat, non-folded configuration suitable for use to support a mattress and a person sleeping/resting thereon.

A foldable bed includes a first frame and a second frame. The first frame has a first board put thereon. A first connector is connected to the front end of the first frame and has a first pin hole and a first aperture which is located below the first pin hole. The second frame has a second board put thereon. A second connector is connected to the rear end of the second frame and has a second pin hole and a second aperture which is located below the first pin hole. A pivot extends through the first and second apertures to pivotably connect the first frame to the second frame. When the first and second frames are extended. A pin extends through the first and second pin holes.

A folding bed base apparatus may include a central frame assembly, a head section, and a foot section. The head section and foot section may be pivotally attached to the central frame assembly such that the folding bed base apparatus may fold to a folded configuration and unfold to an unfolded configuration. The central frame assembly may include a first U-shaped foot rest and a second U-shaped foot rest. The U-shaped foot rests may allow the folding bed base apparatus to stand upright when in the folded configuration. The head section may include a first pivot bar and pivot bar stops which frictionally-obstruct the head section from unfolding past the unfolded configuration. The foot section may include a second pivot bar and pivot bar stops which frictionally-obstruct the foot section from unfolding past the unfolded configuration. Methods for unfolding a folded folding bed base apparatus are disclosed.

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 foldable bed frame includes pivotally connected bedsteads. A bedstead includes an upper frame and a side leg assembly pivotally connected with the upper frame. A bedstead also includes one or more oblique supports each pivotally connected with the upper frame and slidably and rotatably connected with the side leg assembly. A bedstead further includes a shaped lower peripheral support and a plurality of links connecting the lower peripheral support with the upper frame and the side leg assembly. The lower peripheral support can be folded and unfolded along with the upper frame and the side leg assembly.

A foldable supporting frame includes first and second frame units, each with an upper frame, a lower frame, and supports pivotally connected to the upper and lower frames and supporting the upper frame when the foldable supporting frame is unfolded. The foldable supporting frame also includes upper links for pivotally connecting the upper frames of the first and second units and lower links for pivotally connecting the lower frames of the first and second units. Upper and lower links are separated from each other, reducing the overall weight and facilitating smooth folding and unfolding of the supporting frame.

A mattress foundation frame includes: (a) an upper structure that: (i) is defined by an approximately rectangular perimeter having four corners, and (ii) provides a top surface for supporting a mattress foundation; (b) a plurality of legs attached to the upper structure; (c) two first sliding mechanisms, one provided at each of two adjacent ones the corners; and (d) two headboard/footboard bracket assemblies, each having: (i) a bracket for attaching at least one of a headboard or a footboard, and (ii) a second sliding mechanism that is engaged with the first sliding mechanism of one of the two first sliding mechanisms, such that each of the headboard/footboard bracket assemblies is slidably attached to one of the first sliding mechanisms.

An adjustable bed system includes first and second frames; a back lifting assembly having a back lifting bracket pivotally connected to the first frame and a back lifting actuator pivotally connected between the back lifting bracket and the first frame for operably driving the back lifting bracket to pivotally move in an upward or downward rotating direction relative to the first frame; a leg lifting assembly having a leg lifting bracket pivotally connected to the second frame structure and a leg lifting actuator pivotally connected between the leg lifting bracket and the second frame for operably driving the leg lifting bracket to pivotally move in an upward or downward rotating direction relative to the second frame; and a foldable connection mechanism connecting the first and second frames such that the first and second frames are pivotally foldable relative to one another at the connection mechanism.

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.

A bed frame assembly has diagonal struts that lock leg supports into place using novel locking mechanisms. A leg support is pivotally attached to the bedboard frame, and a slotted bracket is welded to a cross bar of the frame. One end of a diagonal strut is pivotally attached to the leg support, and a bolt with a conical washer and a wing nut is attached to the other end. The strut is attached to the slotted bracket by inserting the bolt into a curved slot in the bracket. The bracket also includes a stopper brace that extends perpendicular to the body of the bracket. A side of the end of the strut pushes against the stopper brace when the conical washer is pressed into the end of the curved slot and the wing nut is tightened. The stopper brace prevents the bolt from sliding out of the curved slot.