A lumbar support (100) for a seat (200) defining a back plane (E) comprises a support device (10) having an upper end (O) including an upper angle of inclination () with the back plane (E) and a lower end (U) including a lower angle of inclination () with the back plane (E) and forming an crown of the curvature (S) located in an adjustable position between the upper end (O) and the lower end (U). The lumbar support (100) further comprises at least one angle adjuster (20, 25) connected to the upper end (O) or the lower end (U) and adapted to vary the upper angle of inclination () or the lower angle of inclination () in order to adjust the position of the crown of the curvature (S), and an actuator (30, 35) for adjusting the angle adjuster (20, 25).

A lumbar support system for a seat backrest, the lumbar support system includes a carrier having a first end and a second end opposite the first end. The carrier is movable with respect to the seat backrest in a first direction and in a second direction opposite the first direction. The lumbar support system further includes a first bladder coupled to the first end of the carrier, a second bladder coupled to the second end of the carrier, and a third bladder coupled to the carrier. The third bladder has a contact surface and is configured to move with the carrier. The first bladder is inflatable to move the carrier in the first direction, and the second bladder is inflatable to move the carrier in the second direction. The third bladder is inflatable such that the contact surface is extendable in a third direction.

A seat (1) comprises a seating surface (2) suitable to receive a user and a backrest (3) adaptable according to the user's needs. The seat further comprises a support structure (4) configured to connect the seat to the backrest. The backrest comprises an upper shoulder portion (6) and a lower lumbar portion (7) and the lumbar portion is movable along the support structure while the shoulder portion remains at a fixed height with respect to the support structure (4).

A seat backrest includes right and left side frame segments, a pressure receiving member disposed between the side frame segments movably in a front-back direction, and a cushion pad covering the front of the side frame segments and pressure receiving member. The pressure receiving member includes a main body part, and extending parts extending laterally from both sides of the main body part. The cushion pad includes a back receiving part covering the front of the main body part, and bank parts disposed on both sides of the back receiving part, protruding forward from both sides, and covering the front of the extending parts and side frame segments. A recess is formed at an area, facing a corresponding extending part of the extending parts, of a rear surface of each bank part.

A seating assembly includes a seatback. The seatback includes a frame extending about a periphery of the seatback. The seatback defines a thoracic region and a lumbar region. First and second supports extend from a top portion of the frame to a lower portion of the frame. A first flexible mat and a second flexible mat are operably coupled with the first and second supports. The first flexible mat is disposed proximate the thoracic region. The second flexible mat is disposed proximate the lumbar region.

The present invention relates to a vehicle sheet with a seat back which is provided with a urethane pad covered with a trim cover, and a pressing unit on the reverse side of the urethane pad covered with the trim cover, the pressing unit being formed with a shaft extending laterally and a pair of pressure portions arranged in the vertical direction with respect to the shaft to support both the upper and lower sides of the urethane pad by detecting the intermediate position of turning movement of the pressing unit by means of a turning movement detection unit and stopping the turning movement of the pressing unit, or is configured to press forward the upper side of the urethane pad using the upper pressure portion or the lower side of the urethane pad using the lower pressure portion by turning the laterally-extending shaft of the pressing unit.

A seating assembly includes a seatback. The seatback includes a frame extending about a periphery of the seatback. The seatback defines a thoracic region and a lumbar region. First and second supports extend from a top portion of the frame to a lower portion of the frame. A first flexible mat and a second flexible mat are operably coupled with the first and second supports. The first flexible mat is disposed proximate the thoracic region. The second flexible mat is disposed proximate the lumbar region.

A car seat lumbar support unit performs an elevating operation of an upper bracket relative to a lower bracket which determines a degree of curvature of a seat back by using a first motor, a first transfer screw, and a first nut member (first elevating unit) that are easily designed and manufactured, and performs an elevating operation of the lower bracket and the upper bracket which determines a curved position of the seat back by using a second motor, a second transfer screw, and a second nut member (second elevating unit), wherein a rotary cylinder is organically coupled so that the first elevating unit and the second elevating unit are independently operable without being restricted by each other.

A lumbar support device for a vehicle seat permits vertical and fore-aft adjustment of the support or forces exerted on the back of an operator seated on the vehicle seat. The lumbar support device includes a lumbar panel resiliently flexibly attached to the seat frame and/or seat shell to permit fore and aft movement of the lumbar panel relative to the seat back, the lumbar panel arranged to bear against the seat back, and a cam element having a cam surface bearing against the lumbar panel to apply force to the lumbar panel toward the seat back, the cam element supported on the seat frame and/or seat shell for movement relative to the lumbar panel and relative to the seat shell and/or seat frame, the cam element configured to vary the force applied to the seat back based on the movement of the cam element.

The present invention relates to a vehicle sheet with a seat back which is provided with a urethane pad covered with a trim cover, and a pressing unit on the reverse side of the urethane pad covered with the trim cover, the pressing unit being formed with a shaft extending laterally and a pair of pressure portions arranged in the vertical direction with respect to the shaft to support both the upper and lower sides of the urethane pad by detecting the intermediate position of turning movement of the pressing unit by means of a turning movement detection unit and stopping the turning movement of the pressing unit, or is configured to press forward the upper side of the urethane pad using the upper pressure portion or the lower side of the urethane pad using the lower pressure portion by turning the laterally-extending shaft of the pressing unit.