A chair comprising: a metal frame formed by a plurality of metal elements, including a seat portion having two seat support elements and a backrest portion having two backrest support elements extending upwardly from the seat portion, a flexible backrest panel and/or a flexible seat panel of plastic material having two lateral hollow portions into which respective support elements are inserted, wherein, in a rest condition, there is a transverse clearance between outer edges of said lateral hollow portions and the respective support elements and wherein, in a deformed condition of the flexible backrest panel and/or flexible seat panel said transverse clearance is reduced to zero.

A chair comprising: a metal frame formed by a plurality of metal elements, including a seat portion having two seat support elements and a backrest portion having two backrest support elements extending upwardly from the seat portion, a flexible backrest panel and/or a flexible seat panel of plastic material having two lateral hollow portions into which respective support elements are inserted, wherein, in a rest condition, there is a transverse clearance between outer edges of said lateral hollow portions and the respective support elements and wherein, in a deformed condition of the flexible backrest panel and/or flexible seat panel said transverse clearance is reduced to zero.

The present invention is about a chair back adjusting mechanism, and relates to the technical field of chairs. The chair back adjusting mechanism includes a chair back, which is movably disposed above a supporting surface of a chair seat and is provided with a connecting base at a side close to a fixed bracket, and the chair back is movably connected to the connecting base; the connecting base is provided with a first sleeve pipe at a side close to the fixed bracket, the fixed bracket is provided with a second sleeve pipe at a side close to the connecting base. The chair back is connected to a chair body by a sliding and elastic telescopic assembly, which reduces the user's feeling of fatigue and effectively relieves fatigue at the waist of sedentary people; and the chair back adjusting mechanism has a simple structure, which reduces the manufacturing cost.

A backrest includes a primary frame having a pair of laterally spaced first uprights defining a first opening therebetween, a first front surface and a first rear surface. A secondary frame includes a pair of laterally spaced second uprights defining a second opening therebetween, a second rear surface facing the first front surface of the primary frame and a second front surface, wherein the secondary frame is coupled to the primary frame, and wherein at least portions of the first and second openings are aligned. A flexible shell overlies and is coupled to the second front surface of the secondary frame. The flexible shell includes a third rear surface visible through the aligned portions of the first and second openings.

A backrest includes a primary frame having a pair of laterally spaced first uprights defining a first opening therebetween, a first front surface and a first rear surface. A secondary frame includes a pair of laterally spaced second uprights defining a second opening therebetween, a second rear surface facing the first front surface of the primary frame and a second front surface, wherein the secondary frame is coupled to the primary frame, and wherein at least portions of the first and second openings are aligned. A flexible shell overlies and is coupled to the second front surface of the secondary frame. The flexible shell includes a third rear surface visible through the aligned portions of the first and second openings.

An adjustable rotary rocking chair having a chair frame assembly A, an adjustment mechanism B, and a support tube assembly C, wherein the adjustment mechanism B is detachably connected with the chair frame assembly A and is connected with the support tube assembly C in an insertion manner. The adjustable rotary rocking chair can swing and rotate, has higher flexibility and adaptability due to the fact that the height of the rocking chair and the height of the support tubes can be automatically adjusted by users, is portable through a folding design, and can be used indoors and outdoors.

A seating arrangement includes a base, a back arrangement and a seat arrangement each supported by the base, the back arrangement movable between an upright position and reclined position, the seat arrangement including a stop member, a shell supported on the base and forming at least a portion of the seat arrangement, the shell including a first portion and second portion movable relative to the first portion, the shell configured such that a downward force exerted on the first portion by a seated user forces the back arrangement from the reclined position toward the upright position, and a tilt limiter coupled to the base and configured to engage the stop member at both the upright position and the reclined position.

Office, work and leisure chair and retrofit kit for causing subliminal movements of the person sitting thereon. The chair has a cruciform base (1), freely articulated rollers (4), a gas-spring support (2) and an interface panel (5) resting thereon as a support panel. Mounted on the support panel is a base panel (28) bearing a seat cover (19) with a seat surface and back rest (22). The seat cover is provided and allowed to wobble, resting via a cover panel (27) on a plurality of spring elements (7), which are displaceable radially, or obliquely in relation to the radial direction, or helically from the centre of the base panel to the periphery of the base panel. The spring elements are mechanically, hydraulically, pneumatically or electrically displaceable, so that the wobble distance of the seat cover and the attenuation of the wobble movement are variable.

Office, work and leisure chair and retrofit kit for causing subliminal movements of the person sitting thereon. The chair has a cruciform base (1), freely articulated rollers (4), a gas-spring support (2) and an interface panel (5) resting thereon as a support panel. Mounted on the support panel is a base panel (28) bearing a seat cover (19) with a seat surface and back rest (22). The seat cover is provided and allowed to wobble, resting via a cover panel (27) on a plurality of spring elements (7), which are displaceable radially, or obliquely in relation to the radial direction, or helically from the centre of the base panel to the periphery of the base panel. The spring elements are mechanically, hydraulically, pneumatically or electrically displaceable, so that the wobble distance of the seat cover and the attenuation of the wobble movement are variable.

An ergonomically improved chair in which the user's thoracic region is supported by a narrow and generally flat or moderately convex thoracic cushion in the midrest region of the chairback. The design omits or greatly minimizes support for the user's scapulae and other areas of the back outside the thoracic region, excepting lumbar and cervical support features in some embodiments. The design differs from the prior art at least in that the thoracic cushion is narrow and configured not to complement that user's spinal curvature. By appropriate selection and design, a chair incorporating the invention may comprise a fabric covering portions of the chairback without significantly affecting functionality. Other embodiments include a chairback comprising regions having differing levels of firmness and/or differing cushion height at appropriate regions to promote concentrated support of the user's thoracic region.