A chair for providing seating support to a user and for providing ways for the user to perform exercises. The chair includes a back support that is flexible such that when a force is applied to it by the user's body, the back support bends. The back support may be configured to adapt to the curvature of the user's spine when the user is seated in the chair. The back support may further be configured such that the user can rotate the back support by rotating the user's upper body.

Seating assemblies and methods are disclosed. A seating assembly can comprise a seat, a back support, and a frame component. The frame component can extend from a bottom portion, positioned near an underside of the seat, to a top portion, configured to maintain the back support at a position above the seat. The back support can laterally extend from a left edge portion to a right edge portion and can include a spring member at or near each of the left and right edge portions. The spring member can include at least one undulation or are providing integrated compression adaptation to a user. The seating assembly can further comprise a tilt mechanism, engaged with the frame component, including one or more leaf springs and a spring contact assembly. The spring contact assembly can be positioned on a top side of the one or more leaf springs.

A chair assembly includes a back support arrangement including a back support arrangement, a seat support arrangement and a four-bar arrangement that includes a rearward end and a forward end that is adjustable between a raised and lowered positions, and an arm rest assembly adapted to support the arm of a seated user thereon and supported on the forward end of the four-bar arrangement, wherein the rearward end of the four-bar arrangement is pivotably supported from an arm support structure for pivotable movement about a substantially vertical pivot axis such that the forward end of the four-bar arrangement is moveable between a first position and second position located laterally outward from the first position, and wherein the substantially vertical pivot axis is located forwardly of a rearmost edge of an upwardly-facing surface of the seat support arrangement.

A chair control assembly includes a base structure having first and second pivot points spaced from one another, a seat support structure coupled to the first pivot point, a back support structure coupled to the second pivot point and adapted to move between first and second positions, wherein the base structure does not move as the back support structure moves between the first and second positions, and a control link pivotably coupled to the seat support structure for rotation about a third pivot point and pivotably coupled to the back support structure for rotation about a fourth pivot point, wherein the third pivot point is rearward of the fourth pivot point when the back support structure is in the upright position, and the third pivot point moves forward relative to the fourth pivot point as the back support structure moves from the upright to reclined positions.

An arm rest for a piece of seating furniture, in particular for an office chair, has an arm rest support and an arm support which is movable relative thereto, wherein an elastic return element is provided and the arm support is movable relative to the arm rest support against the restoring force of the return element.

A seating unit component assembly comprises a support component that includes a first surface adapted to abut a seated user, a second surface opposite the first surface, a first end surface, a second end surface opposite the first end surface, and a pair of side surfaces extending between the first and second end surfaces, and a cover having a plurality of sides that cooperate to form an interior space that receives the support component therein, wherein the cover includes a first portion comprising a non-fabric substantially flexible thermoplastic material covering at least a portion of at least one of the side surfaces of the support component, a second portion comprising a fabric covering at least a portion of the first surface and at least a portion of the first end surface of the support component, and a third portion comprising a substantially rigid overlay covering at least a portion of the second end surface and at least a portion of the second surface.

An armrest, in particular for an office chair, achieves improved handling and adjustability in an individual and in a particularly variable manner by providing a preferably height-adjustable armrest column, an arm support carrier which is mounted on the armrest column and which is rotatable about a first rotational axis, and an arm support which is mounted on the arm support carrier. The arm support is rotatable about a second rotational axis and is displaceable in a linear manner relative to the arm support carrier. The two rotational axes are spaced apart from one another.

A shared armrest includes two armrest members which are each configured for supporting a person's arm. The shared armrest is configured so that at least one of the armrest members is displaceable between an undivided condition and a split condition. In the undivided condition the armrest members are substantially together. In the split condition the armrest members diverge relative to each other with respective distal ends of the armrest members spaced apart from each other.

A zero gravity chaise chair includes a seat frame providing a head rest, a back, a bottom and a leg rest, a first bow member connected to one side of the seat frame, a second bow member connected to the other side of the seat frame, a first rolling guide connected to the first bow, a second rolling guide connected to the second bow, and a base connected to the first rolling guide and the second rolling guide. A motor may operate the first rolling guide to vary incline position of the seat frame. The motor may be algorithmically controlled to vary incline position of the seat frame such as to aid blood flow and minimize pressure points of a body positioned on the seat frame.

A chair equipped with shoulder supporter is provided. The chair equipped with shoulder supporter can obtain an effect of attitude remedy by reducing the pressure applied to the spine and by inducing an upright attitude of erecting the waist vertically through a shoulder supporter which is connected to a hip supporter through a base. The shoulder supporter comprises an armpit supporter provided above a vertical supporter. The chair equipped with shoulder supporter can maximize convenience and enable the multi-purpose use by selecting the use and non-use of the arm supporter or the shoulder supporter with the direction change through up-down or forward-rearward direction rotation of the arm supporter or with the folding of the armpit supporter through a rotation shaft.