A vehicle seat device capable of suitably restraining an occupant by means of a seat belt device includes a seat main body having a seat cushion and a seat back, a reclining device connecting the seat back to the seat cushion so as to be pivotable and capable of locking a pivoting motion of the seat back, and a seat belt device for restraining an occupant seated on the seat main body. The seat belt device includes a lap belt restraining the occupant's lumbar or thighs, a belt anchor attached at a position beside the seat main body and having a belt engaging portion engaging with an engaged portion provided in a tip portion of the lap belt, and an anchor moving device capable of moving the belt engaging portion of the belt anchor in a seat front to back direction with respect to the seat main body.

An active system and a computer-implemented method for reducing vibrations of seats in a vehicle is described. The system and method adjust a damping and/or a stiffness of a vibration damper based on system input signals from the vehicle or seat system. The signals include one or more of a signal associated with a user weight, a signal associated with time-dependent movement of a vehicle frame, and a signal associated with time-dependent movement of a seat back or a seat pan. The damping or the stiffness are adjusted by a closed loop control.

A seat having a seat back pivotally connected to a seat pan, the seat back and the seat pan independently pivotal. At the pivot between the seat back and the seat pan there is a rotary energy attenuation device. The rotary energy attenuating device cooperates with a track system along the length of seat longitudinal members allowing for different directions of travel and height adjustment. The vehicle seat offers passive or active protection from impact and sudden acceleration due to accident or explosive events and is capable of automatically resetting.

An airbag includes plural bag portions respectively including two sheet members which are attached to each other, the plural bag portions arranged to be overlapped with each other in a thickness direction of the sheet member, and a welded portion at which the sheet members being in contact with each other are attached to each other. The welded portion includes a communication hole penetrating the sheet members which are in contact with each other to communicate the bag portions which are arranged to be overlapped with each other, and a rib portion arranged radially outward of the communication hole, the rib portion protruding in the thickness direction from a welded surface of the welded portion. The rib portion includes an annular rib surrounding the communication hole, and a cutout portion provided at the annular rib.

A seating posture is stabilized for the shoulders of a passenger seated on a vehicle seat. A vehicle seat is provided with a seat back configured to support the seated person from the rear. A shoulder support portion of the seat back configured to support a corresponding one of the shoulders of the seated passenger includes an air cell configured to expand when air is supplied. When the air cell expands, one end portion of the shoulder support portion on the outside in the width direction of the vehicle seat moves more forward than the other end portion of the shoulder support portion on the inside in the width direction.

An airbag system for repositioning a seat occupant in a moving vehicle during a crash event includes: a first inflatable airbag disposed proximate to a front portion of a seat pan; a second inflatable airbag disposed proximate to a rear portion of the seat pan; and inflation control device controlling deployment of the first and second inflatable airbags. The inflation control device includes a programmable controller controlling inflation parameters of the first and second inflatable airbags to achieve a desired lift, subject to monument constraints.

A seating posture is stabilized for the shoulders of a passenger seated on a vehicle seat. A vehicle seat is provided with a seat back configured to support the seated person from the rear. A shoulder support portion of the seat back configured to support a corresponding one of the shoulders of the seated passenger includes an air cell configured to expand when air is supplied. When the air cell expands, one end portion of the shoulder support portion on the outside in the width direction of the vehicle seat moves more forward than the other end portion of the shoulder support portion on the inside in the width direction.

A vehicle seat comprises a frame member provided on a floor of a vehicle, a seat part such as a seat cushion detachably attached to the frame member, a mechanical connector device provided on the frame member and the seat part for detachably attaching the seat part to the frame member; and an electric connector device provided on the frame member and the seat part for electrically connecting an electric component provided on the seat part to an electric component provided on the frame member.

A seat having a seat back pivotally connected to a seat pan, the seat back and the seat pan independently pivotal. At the pivot between the seat back and the seat pan there is a rotary energy attenuation device. The rotary energy attenuating device cooperates with a track system along the length of seat longitudinal members allowing for different directions of travel and height adjustment. The vehicle seat offers passive or active protection from impact and sudden acceleration due to accident or explosive events and is capable of automatically resetting.

A method for adjusting a position of a vehicle seat from a reclined position to a pre-determinable safety position. The method includes detecting an imminent or ongoing frontal or semi-frontal collision, pretensioning a seat belt associated with the vehicle seat, the seat belt being directly or indirectly attached to a backrest of the vehicle seat, and adjusting the position of the vehicle seat from the reclined position to the pre-determinable safety position by means of a seat adjustment means associated with the vehicle seat, the seat adjustment means being actuated by a collision force generated by the imminent or ongoing frontal or semi-frontal collision and applied via a seat occupant and/or the seat belt to the vehicle seat. The present invention also relates to an occupant safety arrangement for a vehicle seat.