A vehicle seat includes a seat back frame with an upper subframe pivot. A seat back subframe is pivotably connected to the seat back frame at the upper subframe pivot. An actuation assembly pivotably moves the seat back subframe relative to the seat back frame about the upper subframe pivot, between a seat back subframe design position and a subframe recline position. In the recline position a lower edge of the seat back subframe is positioned outwardly relative to the seat back frame with the seat back subframe pivoted to an angle relative to the seat back frame.

A posture adjusting device includes a support member with a pressure receiving surface to be pressed by a body of a user, multiple posture adjusting members each configured to change an uneven state of the pressure receiving surface, a sensor configured to output, when a given posture adjusting member is pressed by the body via the pressure receiving surface, a resistance value that constantly varies in accordance with a magnitude of a press force that is transferred via the given posture adjusting member, a drive unit configured to independently drive each of the multiple posture adjusting members, and a control unit configured to identify the pressed posture adjusting member based on the output of the sensor, and to control the drive unit to cause the pressed posture adjusting member to be moved or deformed to thereby cause the uneven state of the pressure receiving surface to change.

A seat assembly includes a cushioned component having a lattice matrix, wherein the lattice matrix includes a first portion defined by a first pattern of interconnected links which defines a first set of cells, and a second portion defined by a second pattern of interconnected links which defines a second set of cells. The first portion of the lattice matrix includes a density profile that is different than a density profile of the second portion of the lattice matrix. An air bladder is disposed within a core portion of the lattice matrix and includes a non-porous outer casing surrounding an interior cavity. The outer casing of the air bladder and the lattice matrix are integrated components comprised of a common material to define a monolithic structure created using an additive manufacturing process.

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 seat back assembly and method of manufacture is provided. The seat back includes a foam cushion layer. A support sub-assembly is formed including a rigid support layer with a plurality of cavities and channels defined on a rear surface for receiving components and a generally smooth front surface. At least one component is retained in one of the cavities and a second component is secured on the front surface of the support layer. A trim material covers the cushion layer and secures the sub-assembly to the seat back.

Proposed is a lumbar support assembly having an air bladder and components for operating the air bladder and facilitating the assembly and maintenance thereof. The lumbar support assembly includes: a suspension mat having a first hole formed at the inner side thereof, and having a second hole formed at one edge thereof; an air bladder having a first clip hole, which is formed at one edge thereof and overlaps with the first hole; a pouch including a pump and having a second clip hole, which is formed at one edge thereof and overlaps with the second hole; a fixing clip that can be mounted in the first clip hole or the second clip hole; and an electronic valve which has a first tube connected to the air bladder and a second tube connected to the pump and which is coupled to the rear surface of the suspension mat.

A lumbar traction device for treating a lower back of a user includes a shell that is coupled to and extends from a rear edge of a panel. The shell and the panel are configured to position on a seat and in abutment a backrest of a chair, respectively. A coupling means that extends through a front of the shell is coupled to a plate positioned in the shell. The coupling means is configured to couple to a torso of the user to couple the user to the plate. An actuator, which is positioned in the shell and operationally coupled to the plate, is positioned to selectively raise the plate relative to the seat of the chair. The coupling means is configured to transmit an upward force from the actuator to the torso of the user to place a lumbar region of a spine of the user in traction.

An airbag includes a bag portion including two sheet members which are attached to each other. The bag portion provided with the sheet members which are attached to each other includes a peripheral rim portion having a plurality of bent side portions, the bent side portions which each is bent by filling with air inside the bag portion, the bent side portions, the bent side portions which each is formed with a groove-shaped constriction at a surface of the bag portion which is configured to inflate by filling with air.

Inflatable pillow apparatuses are provided herein that include a neck support pillow and a lumbar support pillow that are each fluidly connected to an inflation device. A first fluid pathway permits air to flow from the inflation device to the neck support pillow, and a second fluid pathway permits air to flow from the inflation device to the lumbar support pillow. The pillows may be simultaneously or selectively inflated by the inflation device.

A motor vehicle seat having a backrest and a seat part, at least one flexible, fluid-fillable hollow body attached to the seat part or the backrest, and at least two chambers that are in fluid communication with one another. The chambers are arranged one on top of the other and have in their walls corresponding passages which enable a fluid exchange between the chambers. The chambers are firmly connected to one another in the region of the passages, wherein the volume of the lowermost chamber adjacent to the seat part or the backrest is the largest and the volume of each additional chamber is smaller compared with the volume of the chamber below it. The chambers are arranged one on top of the other such that the maximum lift of the fluid-fillable hollow body when it is being filled with fluid is outside the center of the lowermost chamber.