A seating device (1) with a reclining function comprising a back frame (4) which provides a significant reduction in the complexity of the system, at the same time as it gives the user increased comfort both in an upright (sitting) position and in a reclining position. The back frame (4) comprises in particular two types of resilient elements (7, 8) and rotatable fasteners (6) which provide adaptive support to the lumbar spine in both a sitting and reclining position.

A chair includes a base structure, a seat support structure, a back frame comprising a front surface, a rear surface and a forwardly extending bottom portion pivotably connected to the base, a biasing member biasing the back frame from a reclined position toward an upright position, wherein the biasing member is located entirely forward a rearward most edge of the seat support structure, and a back shell comprising a forwardly extending bottom portion connected to the seat support structure, a front surface, a rear surface positioned in front of the front surface of the back frame, a pair of laterally spaced side portions defining an opening therebetween, and a top portion extending laterally between and connected to the side portions, wherein each of the side portions are exclusively connected to the back frame at a first location.

A chair includes a base structure, a seat support structure, a back frame comprising a front surface, a rear surface and a forwardly extending bottom portion pivotably connected to the base, a biasing member biasing the back frame from a reclined position toward an upright position, wherein the biasing member is located entirely forward a rearward most edge of the seat support structure, and a back shell comprising a forwardly extending bottom portion connected to the seat support structure, a front surface, a rear surface positioned in front of the front surface of the back frame, a pair of laterally spaced side portions defining an opening therebetween, and a top portion extending laterally between and connected to the side portions, wherein each of the side portions are exclusively connected to the back frame at a first location.

A portable lumbar support and ergonomic chair having a lumbar support. The lumbar support has a seat hingedly coupled to a seat back having a teardrop-shaped lumbar support seat back cushion. A rigid back support portion may be rotated forward about hinges to collapse substantially parallel to the seat frame and backward to open to a variety of angles with respect to the seat frame. The seat back freely pivots around an upper lateral axis, and the rigid back support portion is linearly adjustable to space the seat back toward and away from the hinges to enable raising or lowering the upper lateral axis and thus the seat back with respect to the lower lateral axis. This provides multiple ways of changing which part of the teardrop-shaped lumbar support curve hits your lumbar curve for proper support. Variable lumbar lordotic support is thus provided.

In one or more embodiments, a dining chair is provided having a frame, a seat operably connected to the frame, a backrest operably connected to the frame, a reclining mechanism, and a counterbalance assembly positioned within the backrest, among other components. The backrest is configured to move between an upright position and a reclined position. In one or more arrangements, the counterbalance assembly is configured to provide a counterbalance force to move the backrest to the upright position in absence of an opposing force.

A structure for adjusting a support force of a lumbar pillow includes: a back hugger body, a lumbar pillow, an elastic support, and a support adjustment mechanism; wherein a bottom of the back hugger body is hinged to a top of the lumbar pillow, and a back of the back hugger body is provided with a connection arm; one end of the elastic support is connected to a back of the lumbar pillow, and the other end of the elastic support is connected to a front side of the connection arm; and the support adjustment mechanism includes a slide block and a drive assembly connected to the slide block, wherein the slide block is slidably connected between the elastic support and the connection arm and is abutted against a back of the elastic support.

A chair includes a seat, a backrest, and an elastic link. The seat supports a user's buttocks, wherein the backrest supports the user's back, the elastic link elastically connects a side portion of the seat to a side portion of the backrest, the seat includes a seat free end formed at a rear portion thereof without being connected to the backrest and the backrest includes a backrest free end formed at a lower portion thereof without being connected to the seat.

A chair includes a seat, a backrest, and an elastic link. The seat supports a user's buttocks, wherein the backrest supports the user's back, the elastic link elastically connects a side portion of the seat to a side portion of the backrest, the seat includes a seat free end formed at a rear portion thereof without being connected to the backrest and the backrest includes a backrest free end formed at a lower portion thereof without being connected to the seat.

A chair having an articulating backrest that deforms when reclined to support an occupant's head or shoulders. A backrest assembly includes a mesh insert secured to a frame, which includes an upper frame section and a lower frame section interconnected by a pair of articulated joints. A push arm pivotally connects to the chair's seat assembly and to the backrest's upper frame section. As the chair reclines, the push arm restricts the angular movement of the upper frame section relative to a floor. The lower frame section moves forward relative to the upper frame section. Consequently, an angle formed between the lower frame section and the upper frame section decreases during recline, thereby supporting the chair occupant's head or shoulders. Optionally, a tensioning member may connect the mesh insert to the push arm to offset any loss of tension caused by the deformation of the frame during reclined.

A mechanism for an office chair is structurally particularly simple and consequently comparatively inexpensive, but nevertheless extremely variable. Both the seat support and the backrest support are articulated by way of a common pivot axis. The seat support is connected in an articulated manner to the base support by way of at least one pivot bolt and is pivotable relative to the base support. The backrest support is connected in an articulated manner to the base support by way of the at least one pivot bolt and is pivotable relative to the base support.