Embodiments of chair systems incorporating trekking poles include a low-back design employing fixed-length trekking poles, and a high-back design employing adjustable-length trekking poles that allow for adjusting the recline angle of the chair. The chair system generally includes a tubular frame that releasably engages a flexible seat. The tubular frame includes a front hub and a rear hub spaced one from the other by a cross bar, plus front and rear footings which stabilize the chair system on the ground or undersurface. A V-shaped upper support extending from the front hub supports and holds open the leg portion of the flexible seat, while the trekking poles are releasably engaged with and extend upwardly from the rear hub to support, and hold open and upright the back portion of the flexible seat.

A portable folding dual-purpose chair, comprising a seat surface and a seat, the seat comprises a support rod assembly, a connecting rod assembly, U-shaped connectors, four-corner connectors and fixing members; the support rod assembly comprises support rods A, support rods B and support rods C; the connecting rod assembly comprises long connecting rods and short connecting rods. Compared with the prior art, the invention has the advantages that the seat surface and the seat can be separated, the seat can be completely folded and stored, the occupied volume is small, the folding and storing of the folding chair is more convenient and quicker, which improves people's use experience.

A portable folding dual-purpose chair, comprising a seat surface and a seat, the seat comprises a support rod assembly, a connecting rod assembly, U-shaped connectors, four-corner connectors and fixing members; the support rod assembly comprises support rods A, support rods B and support rods C; the connecting rod assembly comprises long connecting rods and short connecting rods. Compared with the prior art, the invention has the advantages that the seat surface and the seat can be separated, the seat can be completely folded and stored, the occupied volume is small, the folding and storing of the folding chair is more convenient and quicker, which improves people's use experience.

A seating furniture support arrangement (6) for a seat or a backrest, suitable, e.g., for a sofa, comprises a first (8) and a second (10; 12) load-carrying longitudinal beam, each being mountable to a seating furniture frame comprising one or more parts; an elastic sheet (16; 14); and a mechanism for stretching the elastic sheet (16; 14) between the first longitudinal beam (8) and the second longitudinal beam (10; 12). The mechanism comprises a first longitudinal beam (8) pivotable on the frame. The elastic sheet (16; 14), with the said seating furniture support arrangement (6) in installed position, is connected to the first longitudinal beam (8) in such a way that the first longitudinal beam (8) pivoting with respect to the frame, in response to an application of an external force or torque, stretches the elastic sheet (16; 14), the external force or torque working against the tension force of the elastic sheet (16; 14) until a point of maximum tension is reached, past which point of maximum tension the tension force facilitates further pivoting of said first longitudinal beam (8), acting to keep the first longitudinal beam (8) in place in a final position.

A seating furniture support arrangement (6) for a seat or a backrest, suitable, e.g., for a sofa, comprises a first (8) and a second (10; 12) load-carrying longitudinal beam, each being mountable to a seating furniture frame comprising one or more parts; an elastic sheet (16; 14); and a mechanism for stretching the elastic sheet (16; 14) between the first longitudinal beam (8) and the second longitudinal beam (10; 12). The mechanism comprises a first longitudinal beam (8) pivotable on the frame. The elastic sheet (16; 14), with the said seating furniture support arrangement (6) in installed position, is connected to the first longitudinal beam (8) in such a way that the first longitudinal beam (8) pivoting with respect to the frame, in response to an application of an external force or torque, stretches the elastic sheet (16; 14), the external force or torque working against the tension force of the elastic sheet (16; 14) until a point of maximum tension is reached, past which point of maximum tension the tension force facilitates further pivoting of said first longitudinal beam (8), acting to keep the first longitudinal beam (8) in place in a final position.

A chair may include a frame, a seat pan, a backrest, a pair of arm rests, and a plurality of legs wherein at least two legs may each provided with an inner leg and an outer leg and the inner leg is configured to telescope out of the outer leg, wherein the at least two legs may include a leg locking system for locking the outer leg to the inner leg when the chair is in an unfolded position, wherein the leg locking system may include a trigger housing, a trigger, and a latch, and wherein the latch may be configured to engage a bushing on the inner leg.

A chair may include a frame, a seat pan, a backrest, a pair of arm rests, and a plurality of legs wherein at least two legs may each provided with an inner leg and an outer leg and the inner leg is configured to telescope out of the outer leg, wherein the at least two legs may include a leg locking system for locking the outer leg to the inner leg when the chair is in an unfolded position, wherein the leg locking system may include a trigger housing, a trigger, and a latch, and wherein the latch may be configured to engage a bushing on the inner leg.

A foldable chair includes backrest rods hinged to a seat unit, leg units, armrest units, a first foldable rod unit, and a linking rod unit. Each leg unit includes a sleeve member connected to the seat unit and slidably sleeved on a rear leg rod connected to the seat unit. Each armrest unit is connected to one of the leg units and one of the backrest rods. The first foldable rod unit is connected between the backrest rods to move the backrest rods. The linking rod unit includes an end connected to the first foldable rod unit, and another end pivotally connected to one of the backrest arm units, or one of the sleeve members of the leg units.

A foldable chair includes backrest rods hinged to a seat unit, leg units, armrest units, a first foldable rod unit, and a linking rod unit. Each leg unit includes a sleeve member connected to the seat unit and slidably sleeved on a rear leg rod connected to the seat unit. Each armrest unit is connected to one of the leg units and one of the backrest rods. The first foldable rod unit is connected between the backrest rods to move the backrest rods. The linking rod unit includes an end connected to the first foldable rod unit, and another end pivotally connected to one of the backrest arm units, or one of the sleeve members of the leg units.

A foldable camping chair, including a foldable supporting frame which includes a connecting unit arranged between two front supporting blocks, a rear supporting block and the two front supporting blocks defining a triangular shape, two side connecting rods, and two front connecting rods; two recessed grooves are formed on a front side of the rear supporting block; two ends of each side connecting rod are movably articulated with a corresponding recessed groove and fixedly plugged in a corresponding front supporting block respectively; two ends of each front connecting rod is movably articulated with an end of the connecting unit and a front supporting block respectively; lower and upper ends of each front supporting block are plugged with a front supporting leg and a front supporting rod respectively; lower and upper ends of the rear supporting block are plugged with a rear supporting leg and a rear supporting rod respectively.