An article of adjustable furniture has at least one support section and a drive mechanism operable to effect pivotal movement of the at least one support section, the drive mechanism including at least a first and a second component pivotally joined by a bearing assembly, such that operation of the drive mechanism causes pivotal movement between the first and second components so as to effect pivotal movement of the at least one support section.

An adjustable bed with an internalized, non-protrusive lumbar-support mechanism is disclosed. The adjustable bed includes a frame structure with uplifted brackets that elevate seat platforms, creating a vertical space to house lumbar support mechanism without protruding below the bed's bottom plane. The lumbar mechanism includes a lumbar support member and a lumbar support lifting assembly mounted beneath the seat or back platforms. The bed frame structure may be foldable for storage and transport. Drive mechanisms independently adjust angles of back, seat, and leg platforms. The design allows the adjustable bed to lie flat for direct placement on traditional bed frames, improves aesthetics and protection of lumbar components, and simplifies packaging and logistics.

An adjustable bed with an internalized, non-protrusive lumbar-support mechanism is disclosed. The adjustable bed includes a frame structure with uplifted brackets that elevate seat platforms, creating a vertical space to house lumbar support mechanism without protruding below the bed's bottom plane. The lumbar mechanism includes a lumbar support member and a lumbar support lifting assembly mounted beneath the seat or back platforms. The bed frame structure may be foldable for storage and transport. Drive mechanisms independently adjust angles of back, seat, and leg platforms. The design allows the adjustable bed to lie flat for direct placement on traditional bed frames, improves aesthetics and protection of lumbar components, and simplifies packaging and logistics.