An ECU device which estimates a length of a lower limb of a seated person who is seated in a vehicle seat is shown. The ECU device includes the following. A thigh angle information obtainer obtains information regarding a thigh angle of the seated person. A back knee angle information obtainer obtains information regarding a back knee angle of the seated person. An estimator estimates the length of the lower limb of the seated person based on the information regarding the thigh angle obtained by the thigh angle information obtainer and information regarding the back knee angle obtained by the back knee angle information obtainer.

A seat back includes: a top-surface seat cover disposed on the top surface; a top-surface cushion pad arranged on a back side of the top-surface seat cover; a contact-surface seat cover disposed on the contact surface; a contact-surface cushion pad arranged on a back side of the contact-surface seat cover and under the top-surface cushion pad; and an airbag having adjustable internal air volume, wherein a lower end portion of the top-surface seat cover is fixed to a first anchorage within the seat back, while covering a lower surface of the top-surface cushion pad, and an upper end portion of the contact-surface seat cover is fixed to a second anchorage within the seat back, while covering an upper surface of the contact-surface cushion pad.

An occupant restraining device that uses a side airbag to promote occupant restraint. An occupant restraining device for restraining an occupant seated in a vehicle seat having a seatback and seat cushion, including: a side airbag arranged on at least one of the right side or the left side of the seat back, a tension member arranged over the side portion of the seat back and the seat cushion and a portion thereof provided on the outer surface of the side airbag, and a traction portion on which another portion of the tension member is provided, that is stowed on the inside of or below the seat cushion, and that can pull the tension member, wherein the tension member arranged on the side of the seatback is pulled toward the center of the vehicle seat by the traction portion.

A seat assembly may include a seat, a first bladder assembly connected to the seat, a second bladder assembly connected to the seat, and/or an electrical control unit (ECU) configured to independently control the first bladder assembly and the second bladder assembly. The ECU may be configured to maintain a level of inflation of the first bladder assembly to provide a hugging effect to a user of the seat while inflating and deflating the second bladder assembly to guide breathing of said user.

According to the disclosure, a seat pad 2 includes a bag-contained pad part 250 including a foam body 240 and a bag body 230 arranged inside the foam body 240.

A vehicle seat is provided. The vehicle seat comprises construction elements that are movable relative to one another and at least one force transmission element which transmits activation forces and/or stress forces that result from the use of the vehicle seat from one construction element to the other. The force transmission element by way of at least one joint is connected to both construction elements, and conjointly with the at least one joint is an integral component part of at least one of the two construction elements.

An occupant support adapted for use in a vehicle includes a seat bottom coupled to a floor of the vehicle and a seat back configured to pivot about a seat-back pivot axis relative to the seat bottom between an upright position and a folded-forward position. The occupant support further includes an upper-back support system configured to support an upper back of an occupant of the occupant support.

A vehicle seat includes a seat base having a side bolster cover. A bolster is disposed under the side bolster cover. The bolster has a static bolster carrier and an operable portion that is operable relative to the bolster carrier to define a plurality of bolster positions. A flexible interior facing extends from the bolster carrier to an intermediate portion of the bolster cover, wherein a lower edge of the bolster cover is positioned below the bolster carrier such that the bolster cover conceals the bolster in each of the plurality of bolster positions.

To better fulfill a sleep-inducing function for a seated person, a seat device includes a pressing device provided in a seat back and configured to press a back or a waist of a seated person to induce breathing; at least one of a temperature adjusting device configured to change a temperature of a seat cushion and/or the seat back and a shape adjusting device configured to change a surface shape of the seat cushion and/or the seat back; and a controller configured to control the pressing device to press the back or the waist of the seated person at a set cycle corresponding to a breathing cycle of a person at a sleeping time, and control the at least one of the temperature adjusting device and the shape adjusting device.

A vehicle seat assembly is provided. The vehicle seat assembly includes multiple inflatable bladders embedded below a seating surface of a seat cushion portion. The inflatable bladders includes a first group and a second group, each of the first group and the second group having at least one of the inflatable bladders. The vehicle seat assembly further comprises a control system operably coupled to the inflatable bladders. The control system is configured to operate a bladder pump to inflate the first group of inflatable bladders to a target pressure, operate a valve coupled to the second group of inflatable bladders to deflate the second group, and upon expiration of a dwell period, operate the bladder pump to inflate the second group of inflatable bladders to the target pressure and operate a valve coupled to the first group of inflatable bladders to deflate the first group.