A seat device includes a seat cushion where a sitting person is seated, and a seatback configured to support the upper body of the sitting person. The seatback includes a seatback frame, a seatback pad placed on a front face of the seatback frame, and a seatback cover covering a surface of the seatback pad. A plurality of stretch airbags is provided in a part of the seatback at a position corresponding to the lumbar part of the sitting person, and the stretch airbags are configured to inflate and press a surface of the seatback to a direction approaching the sitting person. The stretch airbags are placed to overlap each other in a thickness direction of the seatback such that the seatback pad is sandwiched between the stretch airbags.

A motion sickness control system for a vehicle includes a vibrator. The motion sickness control system includes a sensor configured to measure vibration of the vehicle. The motion sickness control system includes a computer having a processor and a memory storing instructions executable by the processor to actuate the vibrator at a target frequency based on the measured vibration of the vehicle. The target frequency attenuates the measured vibration of the vehicle.

An airbag system includes a main airbag device that is provided in front of an occupant and that includes a first bag body, a seat airbag device that is provided in the vehicle seat and that includes a second bag body which is configured to be deployed by being inflated toward at least sides and a front of a torso of the occupant at behind the first bag body and which is configured to restrict the occupant to the vehicle seat, and a seat displacement mechanism that is configured to release restriction by a lock section that restricts movement of the vehicle seat and that is configured to displace the occupant toward the first bag body in front in a case an input impact is equal to or larger than a predetermined strength.

Variable stiffness apparatuses using an interconnected dual layer fluid-filled cell array. One example of the present apparatuses comprises: a substrate having a first side and a second side; and a plurality of structures coupled to the substrate, where each structure comprises: a flexible first portion having a first end, a second end, and a sidewall extending between the first end and the second end, the first portion defining a first chamber; and a second portion having a first end, a second end, and a sidewall extending between the first end and the second end, the second portion defining a second chamber in fluid communication with the first chamber; where each of the plurality of structures is coupled to the substrate such that the first portion is disposed on the first side of the substrate, and the second chamber is disposed on the first side or the second side of the substrate.

A shape memory alloy (SMA) controlled hinge assembly is provided, including assemblies and combinations for adjusting a shape or position of an occupant support component, such as a vehicle seat support component or other seating component. The assembly includes an occupant support component and a hinge assembly configured to adjust a shape or position of at least a portion of the occupant support component. The hinge assembly includes a stationary plate and a movable plate rotatable relative to the base plate about a fixed axis of rotation. The hinge assembly includes a shape memory alloy wire coupling the stationary plate with the movable plate. An actuator is provided and configured to transform the phase of the shape memory alloy wire. In various aspects, the occupant support component is selected from one of a seat bottom; a seatback; a seat bolster; a seat head rest, and the like.

The invention relates to a vibrating warning device for a vehicle seat, having a vibrating patch (31) intended to be attached to the upper face of the padding of the seat part or backrest of one said seat, said patch (31) comprising at least one electrically controlled vibratory actuator (32) accommodated in a flexible support jacket (33); characterized in that said flexible support jacket (33) has a main body (34) enclosing said vibratory actuator(s) (32), and at least two arms (39) extending from said main body (34), on either side of the latter, and each comprising a retaining hook (40) intended to engage with a corresponding recess made in said padding in order to keep said main body (34) against the upper face of this padding.

Seat assemblies and methods for fabricating seat assemblies are provided. In one example, a seat assembly includes a seat frame and a seat cushion that is supported by the seat frame. The seat cushion includes a modular foam arrangement including a first modular foam section having a first interlocking feature and a second modular foam section having a second interlocking feature engaged with the first interlocking feature. An outer covering at least partially covers the modular foam arrangement.

A lumbar support cushion with a cushion cover capable of forming an L shaped cushion that fits on a chair or vehicle seat. A cushion cover encloses a poly foam padding member and more polyethylene closed cell foam lumbar support member. The cushion cover includes a hinged flap to allow for the insertion and removal of the lumbar support member. In a preferred embodiment, the lumbar support member is D shaped In one embodiment the D shaped lumbar support member is comprised of a plurality of nesting D shaped members.

A vehicle seat including: a pad including: a surface pad on a side of a seating surface; and a back pad integrated to the surface pad; and a cover member that covers the pad, a frame-shaped reinforcing member is insert-molded to an outer peripheral edge of the back pad, a part of the reinforcing member, which is a locked portion that locks an end portion of the cover member, is exposed from the back pad, a part in the outer peripheral edge of the back pad other than a part corresponding to the locked portion is formed with recesses, an engagement member attached to the end portion of the cover member being inserted into the recesses, and the part of the back pad corresponding to the locked portion is thinner than a part of the back pad where the recesses are formed.

A vehicle seat including: a seat pad capable of elastically supporting an occupant, the seat pad having a seating portion that allows the occupant to seat on a front surface thereof, and the seating portion is divided in a seat width direction into a first region, a second region, and a central region formed between the first and the second region, the first region and the second region being capable of being concave-deformed toward a back surface of the seat pad opposite to the front surface when pressed by the occupant in a seating state, and in a free state where the seating portion is not pressed, a central region part in the central region arranged between the first and the second region that are to be concave-deformed has a shape concaved toward the back surface of the seat pad as compared to the first and the second region.