An iron frame sofa with a foldable hinge structure, including a sofa mainframe with connecting square tubes mounted at the sofa mainframe. Supporting legs are mounted at the connecting square tubes. A grille supporting frame is mounted on the sofa mainframe. A first assembling pipe seat is mounted on the sofa mainframe. A first assembling pipe is sleeved with the first assembling pipe seat at the first assembling pipe seat. A second assembling pipe seat is mounted on the sofa mainframe. A second assembling pipe is sleeved with the second assembling pipe seat at the second assembling pipe seat. Folding hinges are mounted at the second and first assembling pipes. Foldable top bars are mounted on the foldable hinges.

The present disclosure relates to a back support with a ground mat. The back support may include a backrest panel and a support panel having an internal frame member and a flexible support sheet. The backrest panel and support panel can be connected with a hinge. The back support may further include a ground mat portion having one or more ground mat panels. The back support may be configured to be placed in multiple positions, including a first position to support a user, a second position for transporting the back support, and a third flattened position.

A chair add-on, a chair, a chair modification, a chair hinge, and/or a hinge system that may be used to provide enhanced seating comfort to users. It is preferred, but not necessary, that the chair add-on, the chair, the chair modification, the chair hinge, and/or the hinge system is easy to use by users of all ages.

Convertible chairs that can be converted to and from an open chair configuration to a box or table configuration for storage and protection of the interior portions is provided. The convertible chairs can have include one or more of a sunshade, adjustable foot rest, legs, wheels, and can in some embodiments be a reclining chair. In some aspects, a cover portion can be used to cover a portion of the interior portions of the chair when the convertible chair is in a box configuration, and be folded and retracted into a pocket of the convertible chair when in an open chair configuration.

Convertible chairs that can be converted to and from an open chair configuration to a box or table configuration for storage and protection of the interior portions is provided. The convertible chairs can have include one or more of a sunshade, adjustable foot rest, legs, wheels, and can in some embodiments be a reclining chair. In some aspects, a cover portion can be used to cover a portion of the interior portions of the chair when the convertible chair is in a box configuration, and be folded and retracted into a pocket of the convertible chair when in an open chair configuration.

The present invention relates to a spine orienting device for integration into a variety of types of seats, for example, automotive seats or office type seating, in order to properly position the sacrum of the individual using the seat, which in turn will properly pivot the pelvis to assist in maintaining the spine in equilibrium.

A bleacher seat with retractable and foldable armrests comprises two hook assemblies, a cushion assembly, a backrest assembly, two cushion-backrest connecting assemblies and two armrest assemblies, wherein the two hook assemblies are symmetrically arranged at the front end of the bottom surface of the cushion assembly, the lower ends of the two symmetrical cushion-backrest connecting assemblies are fixedly mounted at the rear ends of left and right sides of the cushion assembly respectively, and the upper ends of the two cushion-backrest connecting assemblies are symmetrically arranged at and rotatably connected to the lower ends of two sides of the backrest assembly. The two armrest assemblies are arranged symmetrically, the upper end and lower end of each armrest assembly are rotatably connected to a corresponding side of the cushion assembly and a corresponding side of the backrest assembly respectively, and the armrest assemblies are retractable; and a detachable cushion cloth is arranged on the cushion assembly, and a detachable backrest cloth is arranged on the backrest assembly. Armrests of the bleacher seat are retractable and foldable, all components are rotatably connected, and the cushion cloth and backrest cloth are detachable, so that the bleacher can be folded to be stored.

A folding chair includes front and rear supports that fold and/or retract into central beams to reduce the space occupied by the chair in a folded configuration. A backrest is coupled to the central beams with a hub that allows an angle of the backrest relative to the central beams to be selected and for the backrest to be folded flat relative to the central beams. One or more actuators and pin actuators may control the relative movements of the backrest, front support, rear support, and central beams.

In one example, a backpack chair includes a U-shaped frame to form a base for the backpack chair. The U-shaped frame has two sides connected to each other by a semicircular section. In a sitting mode where the backpack chair is for sitting, the two sides of the U-shaped frame extend in a horizontal plane and the semicircular section extends in a substantially vertical plane. In a backpack mode where the backpack chair is carried as a backpack, the two sides extend in a vertical plane and the semicircular section extends in a substantially horizontal plane. The backpack chair comprises a top member that includes a combined seat and back support for the U-shaped frame. In the sitting mode, the top member is attached to the U-shaped frame, and in the backpack mode, the top member is detached from the U-shaped frame.

In one example, a backpack chair includes a U-shaped frame to form a base for the backpack chair. The U-shaped frame has two sides connected to each other by a semicircular section. In a sitting mode where the backpack chair is for sitting, the two sides of the U-shaped frame extend in a horizontal plane and the semicircular section extends in a substantially vertical plane. In a backpack mode where the backpack chair is carried as a backpack, the two sides extend in a vertical plane and the semicircular section extends in a substantially horizontal plane. The backpack chair comprises a top member that includes a combined seat and back support for the U-shaped frame. In the sitting mode, the top member is attached to the U-shaped frame, and in the backpack mode, the top member is detached from the U-shaped frame.