The present disclosure relates to a chair tray and chassis, chassis forming method and chassis mounting structure of the same. The chair chassis comprises a chassis body that is arranged with a mounting hole thereon for mounting a regulating knob. The edge at the position corresponding to the mounting hole of the chassis body is arranged with a flange. The structural strength and the fatigue strength of the chassis can be enhanced effectively by arranging the flange at the position corresponding to the mounting hole of the chassis, which avoids the occurrence of fracture at the perimeter of the mounting hole of the chassis during use or test and thus enables the thickness of the chassis to be reduced below 3 mm, reducing production material to a very large extent and saving production cost while also ensuring that it can pass the back pad fatigue test in the BIFMA standard.

A furniture leg protective sock is constructed of a stretchable/expandable non-friction material, which is double-layered to form an outer layer, an inner layer, and a gap therebetween. The furniture leg protective sock includes friction material which is located on the inner surface of the furniture leg protective sock.

The invention discloses a pedestal apparatus for an article of furniture. The pedestal apparatus has an elongate post formation defining a first end and a second end and having a longitudinal axis. The post formation immovably supports a fixed foot arrangement and also movably supports a variable foot arrangement. The variable foot arrangement is selectively movable along and around the longitudinal axis for varying a longitudinal and angular proximity between the variable foot arrangement and the fixed foot arrangement. Biasing means are provided for controlling movement of the variable foot arrangement whereby, in use, the biasing means causes both the fixed foot arrangement and the variable foot arrangement to abut an underlying surface and thereby provide a substantial stabilization of the pedestal apparatus.

A chair, according to the present invention has an inverted pyramidal shape primarily determined by triangular side and back frames of the chair. The frames include two side frames and a back frame and preferably a smaller front frame. Each side frame is secured to a central portion of a pedestal type base and extends upwardly and outwardly from the base. Each frame adjacent an upper edge is mechanically secured to an adjacent frame with the frames cooperating to form a U shape generally at the height corresponding to side arms of the chair. A support seat is provided in the frames and the side frames define arms of the chair. A back support is secured to the back frame at a position intermediate the height of the back support with a lower edge of said back support joining with a rear edge of the support seat. The side frames and back frame between said seat and an upper edge of the frames are of a triangular or truncated triangular shape.

A chair wedge includes: a first tier having a downward sloped first top surface from a first tier top rear edge to a first tier top front edge; a second tier recessed within a center portion of the first tier and having a downward sloped second top surface from a second tier top rear edge to a second tier top front edge, and wherein the downward sloped second top surface is at a lesser angle relative to a base surface than is the downward sloped first top surface; a cavity formed in a space differential between the downward sloped first top surface and the downward sloped second top surface; and a rear wall defined at an inward most portion of the cavity and configured in combination with the cavity to stop a chair leg from further movement when placed within the chair wedge.

A ball chair includes a ball-shaped cushion, a seat, a back and at least a threaded fastening member. The seat has a bearing portion for bearing the cushion, and a connecting portion connected with the bearing portion and having an engaging recess and at least a through hole communicating with the engaging recess. The back has an engaging block inserted in the engaging recess and having at least two relatively larger protrusions, at least a relatively smaller protrusion located between the two relatively larger protrusions, and at least a threaded hole provided in the relatively smaller protrusion and corresponding in position to the through hole. The threaded fastening member is inserted through the through hole and fixed in the threaded hole to fix the back to the seat.

A chair includes a deformable seat shell forming a seat part and a backrest, and further includes a frame, the seat part being connected to the frame by means of a first pivot joint and the backrest being connected to the frame by means of a second pivot joint, the pivot joints allowing a twisting of the seat part and of the backrest relative to the frame caused by a deformation of the seat shell. The second pivot joint is connected to the backrest centrally in relation to the transverse direction of the chair.

A device to stably sit at a level close to that of a fence so as to see over it. This invention provides the view of a tall chair while having stability because it is attached to a fence. It also folds down to a small size for easy transportation and storage unlike a tall chair.

The invention relates to a frame furniture comprising a furniture element (14) being plate-shaped at least in some areas and having an at least partially nearly horizontal extension and being arranged on a carrier frame (18) which has a leg element (20A, 20B) on both sides, respectively, regarding a vertical furniture median plane, the leg element (20A, 20B) consisting of a tubular element bent in such a way that the tubular element forms a front and rear furniture leg (22A, 22B, 24A, 24B). The tubular elements each have an elliptical or oval cross section having a long major axis and a short minor axis, wherein the major axis and the minor axis intersect with the vertical furniture median plane over the length of the particular tubular element at an angle less than 90 .

The present invention discloses a chair tray and chassis, chassis forming method and chassis mounting structure of the same. The main points of its technical solution are that the chair chassis comprises a chassis body that is arranged with a mounting hole thereon for mounting a regulating knob. The edge at the position corresponding to the mounting hole of the chassis body is arranged with a flange. The structural strength and the fatigue strength of the chassis can be enhanced effectively by arranging the flange at the position corresponding to the mounting hole of the chassis, which avoids the occurrence of fracture at the perimeter of the mounting hole of the chassis during use or test and thus enables the thickness of the chassis to be reduced below 3 mm, reducing production material to a very large extent and saving production cost while also ensuring that it can pass the back pad fatigue test in the BIFMA standard. Additionally, the fact that the flange surrounds the mounting hole can increase the structural strength and the fatigue strength at the perimeter of the mounting hole of the chassis more all around with a better effect.