Abstract: A head rest of a vehicle seat may include a main body having a front portion for supporting a head of a passenger and a rear portion that is attached to a head rest stay, a moving mechanism that is arranged and constructed to move the main body or the front portion vertically and to move the front portion back and forth, and a control device that is arranged and constructed to control motions of the moving mechanism. The moving mechanism includes a first moving mechanism for upwardly moving the main body or the front portion and a second moving mechanism for forwardly moving the front portion. The control device controls the motions of the moving mechanism based upon a detection signal that is generated when a vehicle collision is predicted or sensed, so that the second moving mechanism is actuated after the first moving mechanism is actuated.

Abstract: A head rest of a vehicle seat may include a main body having a front portion for supporting a head of a passenger and a rear portion that is attached to a head rest stay, a moving mechanism that is arranged and constructed to move the main body or the front portion vertically and to move the front portion back and forth, and a control device that is arranged and constructed to control motions of the moving mechanism. The moving mechanism includes a first moving mechanism for upwardly moving the main body or the front portion and a second moving mechanism for forwardly moving the front portion. The control device controls the motions of the moving mechanism based upon a detection signal that is generated when a vehicle collision is predicted or sensed, so that the second moving mechanism is actuated after the first moving mechanism is actuated.

Abstract: Seat lifting devices disposed between a seat support for supporting a seat cushion and a seat mount for mounting the seat support are taught that comprise a front and rear linking mechanisms movably interconnecting the seat support and the seat mount. These linking mechanisms are arranged and constructed to vertically adjust the seat cushion when operated. The rear linking mechanism comprises a first linking arm that is pivotally connected to the seat mount and the seat support, and a second linking arm that is pivotally connected to the seat support. The second linking arm is provided with a rear slide pin that slidably engages a rear guide slot formed in the seat mount. The rear slide pin is arranged and constructed to engage a plurality of teeth formed in the rear guide slot when a large force is applied to the seat support in a direction to separate the seat support from the seat mount.

Abstract: Seat lifting devices disposed between a seat support for supporting a seat cushion and a seat mount for mounting the seat support are taught that comprise a linking mechanism movably interconnecting the seat support and the seat mount, so that the seat cushion is vertically adjusted when the linking mechanism is operated, and a seat support pulling means connected to the seat support and the seat mount. The seat support pulling means is adapted to be shortened when the seat support is subjected to an impact.

Abstract: Seat lifting devices disposed between a seat support for supporting a seat cushion and a seat mount for mounting the seat support are taught that comprise a linking mechanism movably interconnecting the seat support and the seat mount, so that the seat cushion is vertically adjusted when the linking mechanism is operated, and a seat support pulling means connected to the seat support and the seat mount. The seat support pulling means is adapted to be shortened when the seat support is subjected to an impact.

Abstract: Seat lifting devices disposed between a seat support for supporting a seat cushion and a seat mount for mounting the seat support are taught that comprise a front and rear linking mechanisms movably interconnecting the seat support and the seat mount. These linking mechanisms are arranged and constructed to vertically adjust the seat cushion when operated. The rear linking mechanism comprises a first linking arm that is pivotally connected to the seat mount and the seat support, and a second linking arm that is pivotally connected to the seat support. The second linking arm is provided with a rear slide pin that slidably engages a rear guide slot formed in the seat mount. The rear slide pin is arranged and constructed to engage a plurality of teeth formed in the rear guide slot when a large force is applied to the seat support in a direction to separate the seat support from the seat mount.

Abstract: Seat lifting devices disposed between a seat support for supporting a seat cushion and a seat mount for mounting the seat support in order to vertically adjust the seat cushion are taught that comprise a first linking mechanism movably interconnecting the seat support and the seat mount. The first linking mechanism comprises first and second linking arms that are respectively pivotally connected to the seat mount and the seat support via pivot axes. One of the pivot axes of the second linking arm comprises a movable pivot axis that is arranged and constructed to move along the second linking arm and to engage the second linking arm, so that substantial length of the second linking arm can be changed when the movable pivot axis moves along the second linking arm.

Abstract: Vehicle seats are taught that comprise a cushion frame (10) having a pair of frame elements (12) and a cylindrical connector member (14) that interconnects the frame elements. At least one seatbelt pretensioning device (20, 40) preferably exerts a traction force on a seatbelt when the vehicle is subjected to an impact. The pretensioning device may include a drive force generating means (22, 42) and a movable member (26, 46). The drive force generating means and the movable member are preferably received within a cavity of the connector member. The movable member is preferably arranged and constructed to move along the connector member when the drive force generating means is actuated.