A folding chair frame structure includes left and right supporting frame units, front and rear connecting frame units, and a pair of armrest supporting rods. A top of each armrest supporting rod has a spherical head. Each armrest supporting rod has an engaging groove below the spherical head. A pair of armrest rods is pivotally connected to respective rear parts of the left and right supporting frame units. A front end of each armrest rod has a joint. A lower end of the joint has an accommodating chamber. A side wall of the accommodating chamber has at least one receiving opening. An engaging plate is detachably inserted in the receiving opening. The engaging plate has a through hole. When the spherical head is inserted in the accommodating chamber and passes through the through hole, the engaging plate is engaged with the engaging groove.

A folding chair with armrests includes a chair frame which includes a left crossed tube structure consisting of a first left crossing tube and a second left crossing tube crossed with and hinged to each other, and a right crossed tube structure consisting of a first right crossing tube and a second right crossing tube crossed with and hinged to each other. The chair frame further includes two backrest tubes, two armrest tubes and two armrest support tubes, lower ends of the two backrest tubes are respectively hinged to the first left crossing tube and the first right crossing tube, two backrest sliders are respectively sleeved on middle portions of the two backrest tubes, and the two backrest sliders are respectively hinged to the second left crossing tube and the second right crossing tube, and one end of each armrest tube is hinged to a respective backrest tube.

First and second U-shaped cross-members each have legs connected by cross bars and pivotally connected with each other at central portions thereof, and are mutually movable from a generally X-shaped setup condition in which the cross bars are transversely spaced apart, to a generally flat collapsed condition. Right and left frame side assemblies respectively are pivotally connected to the first and second cross-members at terminal ends of their respective front and rear portions and by at least one lost motion linkage.

A collapsible and portable chair comprises an articulated chair frame that includes a plurality of pivotally interconnected elongated frame members, as well as a plurality of pivots and joints that define mutually parallel axes about which the chair can be folded from a set-up configuration to a flattened and collapsed configuration. The chair frame includes a front leg assembly, a rear leg assembly, a backrest frame assembly and two independent laterally spaced seat frame members. A fabric panel extends between members of the chair frame to define a seating panel and a backrest panel for receiving a seated user in the set-up condition of the chair. Straps can be provided to facilitate transport of the chair in its folded condition, notable as backpack straps that free up the user's hands so that other objects can be carried along with the folded chair.

The invention discloses a double folding chair with rotation angles. The double folding chair comprises four backrest pipes and two armrest pipes, wherein the a wrest pipes and the backrest pipes form a folding chair frame, rotation-angle transverse-bracing pipes are arranged between the two backrest pipes in the middle so that a flare angle can be formed between two chair backs, and intermediate connecting pieces which can rotate coaxially are arranged on a front support of the folding chair frame so as to be matched with the rotation-angle transverse-bracing pipes. Since the flare angle can be formed between two chair bodies, chair users can communicate conveniently, and the double folding chair has the advantages of being reasonable in structure, good in user experience etc.

The present invention is to a type of folding chair, wherein two front and rear support bars, the upper ends of which are hinged onto two diagonal bars; the front and rear support bars connect at the point of a slide housing, which results in the formation of an operational hinged structure. The two front support bars are constructed independently and are reinforced with a horizontal bar assembly on both sides that attaches near the slide housing hinged areas of the front support bars on the upper ends. This structure serves to reinforce the slide housing hinged area and when the two front support bars are fixed firmly to the floor, the chair will not tip over and the user will be able to sit more safely.

The invention discloses a double folding chair with rotation angles. The double folding chair comprises four backrest pipes and two armrest pipes, wherein the a wrest pipes and the backrest pipes form a folding chair frame, rotation-angle transverse-bracing pipes are arranged between the two backrest pipes in the middle so that a flare angle can be formed between two chair backs, and intermediate connecting pieces which can rotate coaxially are arranged on a front support of the folding chair frame so as to be matched with the rotation-angle transverse-bracing pipes. Since the flare angle can be formed between two chair bodies, chair users can communicate conveniently, and the double folding chair has the advantages of being reasonable in structure, good in user experience etc.

A chair includes a support structure, a fabric seat unit and a retaining strip. The support structure includes a ring frame having an inner periphery bounding a ring space. The fabric seat unit includes a seat member in the ring space, and a plurality of sleeves annularly spaced apart from each other and connected to an annular rim of the seat member. The sleeves pass over an outer periphery of the ring frame and bends inwardly toward the inner periphery of the ring frame. Each sleeve has a passage. The retaining strip removably extends through the passage of each sleeve. When the fabric seat unit is loaded, each connection members engages and positions the retaining strip to the ring frame.

The chair is an upwardly folding chair. It includes an upholstered seat cushion, a seat, and supporting legs. The upholstered seat is hung on the seat. The seat is supported by supporting legs. The supporting leg consists of four facades. Each facade consists of a pair of two diagonal bars which are crossed and hinged together in the center. The facade on each side consists of the front-tilting diagonal and the rear-tilting diagonal bar in the diagonal bar pair, a connecting bar and a supporting bar. The front-tilting diagonal bar is hinged to the front of the seat, and the rear of the seat is supported by supporting bars which include a left half and a right half, with corresponding or symmetrical seat bars, and it is formed by joining the front folding leaf and the rear folding leaf.

First and second U-shaped cross-members each have legs connected by cross bars and pivotally connected with each other at central portions thereof, and are mutually movable from a generally X-shaped setup condition in which the cross bars are transversely spaced apart, to a generally flat collapsed condition. Right and left frame side assemblies respectively are pivotally connected to the first and second cross-members at terminal ends of their respective front and rear portions and by at least one lost motion linkage.