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.

An adjustable chair comprising a seat part, a seat back disposed along one side of the seat part, the seat back being configured for supporting at least a person's back or shoulders, a chair base configured for being placed on a floor, at least one adjustable chair feature including a motor capable of being selectively controlled and driven so as to adjust at least one of: the rotation or tilt of the seat part, a vertical distance between the seat back and the one side of the seat part, an angle position between the seat back and the seat part, and a distance between the chair base and the seat part.

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.

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.

A balancing pressure bearing apparatus including a connecting base and bearing components is provided. Inside the connecting base is any material selected from a volume-incompressibe fluid, semifluid and elastic element, and arranged thereabove is each bearing component. The bearing components have bearing surfaces for supporting any pressing-down human body part and pressure reduction. When the connecting base is pressed down, a Pascal phenomenon is generated for a pressure applied to the fluid, semifluid or elastic element inside the connecting base to be transmitted equally in all directions. Each portion thereof has the same pressure for balancing pressure of the supportive bearing surfaces pressed by any two human body parts, thereby reducing and balancing pressures thereon to achieve a more comfortable contact sensation of pressure release and a correct posture effect. Hence, the invention can serve as a cushion, seat, backrest, mattress or pillow product.

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 vehicle seat comprising: a seat cushion frame that structures a frame of a seat cushion and that is configured to support buttocks of a seated vehicle occupant; a seat cushion pad mounted to the seat cushion frame; and a pelvis supporting portion having a push-up portion that is provided at a seat lower side of the seat cushion pad along a seat left-right direction and that, by being displaced toward a seat upper side, pushes a seat rear side portion of the seat cushion pad toward the seat upper side.

A chair is described herein. The chair includes a first back support coupled to a base of the chair using one or more first support arms. The chair also includes a second back support coupled to the base of the chair using one or more second support arms. The first and second back supports are independently rotatable.

An adjustable chair comprising a seat part, a seat back disposed along one side of the seat part, the seat back being configured for supporting at least a person's back or shoulders, a chair base configured for being placed on a floor, at least one adjustable chair feature including a motor capable of being selectively controlled and driven so as to adjust at least one of: the rotation or tilt of the seat part, a vertical distance between the seat back and the one side of the seat part, an angle position between the seat back and the seat part, and a distance between the chair base and the seat part.