A vehicle seating assembly includes a frame and an articulating flexmat assembly operably coupled with the frame. The articulating flexmat assembly includes an upper flexmat extending from a first side of the frame to a second side of the frame and a lower flexmat extending from the first side of the frame to the second side of the frame. The upper flexmat includes an upper static portion and an upper dynamic portion disposed above the upper static portion and adjustable by upper linear actuators that draw the upper dynamic portion toward the upper static portion to arc the upper flexmat outward. The lower flexmat includes a lower static portion adjacent to the upper static portion and a lower dynamic portion disposed below the lower static portion and adjustable by lower linear actuators that draw the lower dynamic portion toward the lower static portion to arc the lower flexmat outward.

An adjustable chair support system includes a first seat back support member spaced from a second seat back support member, and a seat back tensioning assembly extending between the first and second seat back support members, the seat back tensioning assembly includes a carrier, an adjustable tension member coupled to the carrier, and a cable, wherein the cable extends between the first and second seat back support members a plurality of times, and wherein the adjustable tension member is configured to adjust a tension of the cable

An ergonomic chair includes a back component and a seat component. The back component includes an upper back support, a lower back support, a seat back frame that is elastically deformed under traction or squeezing, and a locking mechanism for maintaining positions of the above three components to be relatively fixed. The lower back support is connected to the seat component through a connecting rod. A lower end of the upper back support is rotatably connected to an upper end of the lower back support. Upper and lower ends of the seat back frame are respectively hinged on an upper portion of the back support and the lower portion of the lower back support.

A chair back assembly includes a frame assembly including a pair of slots extending through the frame assembly, a first location positioned between the pair of slots, and a pair of second locations located outward of an outer periphery of the frame assembly, and a vertically adjustable lumbar assembly configured to support a lumbar area of a seated user and including a central portion and a pair of end portions slidably engaging the central portion, the central portion located in the first location and the end portions located in the second locations, wherein the pair of end portion are slidably moveable within the slots between a first position and a second position that is different than the first position.

Back rest to be used in association with a chair or a seat providing an adaptable convex back support for individual adjustment. The back rest comprises a plate shaped body that is bent into a curved shape by use of a tensioning device. The back rest can be used to increase comfort while seated, for example at the office or during travels, or to prevent or relieve back strain and ache as a result of being seated over longer periods or having back problems. The back rest is portable and fits into a backpack or handbag, and can be set up in a conventional chair, for example a seat in an airplane, waiting area, or office chair.

An adjustable chair support system includes a first seat back support member spaced from a second seat back support member, and a seat back tensioning assembly that extends between the first and second seat back support members. The seat back tensioning assembly includes a carrier coupled to the first seat back support member, the carrier including an adjustable tension member and a first guide member, a pair of second guide members coupled to the second seat back support member, and a cable extending from the adjustable tension member into engagement with one of the pair of second guide members, with the first guide member, with the other of the pair of second guide members, and then returning to the adjustable tension member.

A lordosis support for a seat back rest, includes a support plate, tension members for holding the support plate between two frame legs of the seat back rest, the support plate having on each side at least one point of attack for a respective tension member, and an adjusting device for adjusting a tension force of the tension members by changing the distance between the two points of attack, wherein the distance between the two points of attack is adjustable and the adjusting device is configured to change this distance, wherein the support plate is a one-piece support plate, and the two points of attack are linearly moveably arranged at the one-piece support plate for translational movement.

A chair back structure includes a flexible sheet, the flexible sheet mounted on a support plate so as to adjust a curvature of a chair back by changing a curvature between two ends of the flexible sheet. A fixing segment of the flexible sheet is connected with an end of the support plate. The support plate includes two tilted abutting tabs configured to abut against with a moving segment of the flexible sheet in a sliding path, such that when the moving segment is operated to change the curvature of the flexible sheet, the moving segment slides along the two tilted abutting tabs forward or backward so as to produce a displacement, thus enhancing a bending deformation of the chair back.

An office system including a first component and a second component moveable relative to the first component. A distance and/or force multiplier is disposed between and coupled to the first and second components. The distance and/or force multiplier includes a shape memory material, wherein the shape memory material is contractible between at least a non-energized state and an energized state in response to an application of energy. The distance and/or force multiplier moves the second component relative to the first component when the shape memory material is contracted to the energized state.

A vehicle seat can be configured to provide support to a vehicle occupant in conditions when lateral acceleration is experienced. Shape memory material members can be operatively positioned with respect to a seat portion of the vehicle seat. The shape memory material members can be selectively activated by an activation input. When activated, the shape memory material members can engage a seat pan so as to cause the seat pan to tilt in a respective lateral direction. As a result, a seat cushion supported by the seat pan can also tilt in the respective lateral direction. The seat cushion can be tilted in a lateral direction that is opposite to the direction of the lateral acceleration. Thus, the effects of lateral acceleration felt by a seat occupant can be reduced. The shape memory material members can be selectively activated based on vehicle speed, steering angle, and/or lateral acceleration.