A seat device, particularly aircraft seat device, includes at least one head-support module, which device has a central cushion unit and at least one lateral cushion unit, wherein the lateral cushion unit is supported movably relative to the central cushion unit.

The invention discloses an automobile headrest, comprising a shell, support arms, and a seat fixing part; the seat fixing part is arranged on the shell for fixing with the fixing rod on the automobile seat; each support arm is provided with a rotating shaft and a sliding shaft; the sliding shaft slides in a slideway inside the shell; one end of the sliding shaft is rotatably connected to the rotating shaft through a rotating structure; the support arm is slidably installed in the shell through the sliding shaft; the width between the support arms is adjusted laterally through the sliding shaft. The invention realizes the distance adjustment between the support arms through the lateral movement of the sliding shaft, realizes a better lateral adjustment of the sliding shaft through the design of the locking plate, the concave-convex part and the like, and realizes a better degree of freedom and comfort.

The invention discloses an automobile headrest, comprising a shell, support arms, and a seat fixing part; the seat fixing part is arranged on the shell for fixing with the fixing rod on the automobile seat; each support arm is provided with a rotating shaft and a sliding shaft; the sliding shaft slides in a slideway inside the shell; one end of the sliding shaft is rotatably connected to the rotating shaft through a rotating structure; the support arm is slidably installed in the shell through the sliding shaft; the width between the support arms is adjusted laterally through the sliding shaft. The invention realizes the distance adjustment between the support arms through the lateral movement of the sliding shaft, realizes a better lateral adjustment of the sliding shaft through the design of the locking plate, the concave-convex part and the like, and realizes a better degree of freedom and comfort.

There is provided a vehicle seat including: a seatback frame of a seatback that supports a back area of a vehicle occupant, the seatback frame including: a left and right pair of side frame portions spaced apart in a seat width direction; and an upper frame portion that joins between end portions, at a seat upper side, of the left and right pair of side frame portions in the seat width direction, a headrest that supports a head area of the vehicle occupant being supported at the upper frame portion; and a plastic deformation portion provided at the upper frame portion, the plastic deformation portion being plastically deformed and moving at least a portion of the upper frame portion toward a seat rear side together with the headrest, when a load toward the seat rear side that exceeds a predetermined value is applied to the plastic deformation portion.

A reversible seat assembly for use with an airplane. The reversible seat comprises a base assembly and a vertical assembly. The base assembly and the vertical assembly are connected to a support structure and are collectively disposable into and out of a first travel position, a second travel position, and a third travel position. In the first and second travel positions a user or passenger may assume a usual sitting position. In the third travel position the user may assume a reverse sitting position. The base assembly comprises a right segment and a left segment connected and rotationally movable to a central segment. The vertical assembly comprises a lower segment and an upper segment connected to and rotationally movable a middle segment. The reversible seat assembly may further comprise a back armrest connected to an opposite side of said middle segment and structure to provide support to the arms of the user.

A vehicle seat has a seat bottom, a backrest which is attached to the seat bottom and has a backrest structure, and a headrest attached to the backrest. The headrest has a headrest structure provided with an upholstery cover and inserted by way of at least one support rod in an associated support rod holder of the backrest structure and being locked or lockable there. At least one damping element is provided between the backrest structure and the headrest structure.

A vehicle seat has a seat bottom, a backrest which is attached to the seat bottom and has a backrest structure, and a headrest attached to the backrest. The headrest has a headrest structure provided with an upholstery cover and inserted by way of at least one support rod in an associated support rod holder of the backrest structure and being locked or lockable there. At least one damping element is provided between the backrest structure and the headrest structure.

An improved head restraint is provided for a reversible seat that is movable between two use positions, namely a forward-facing position and a rearward-facing position. The improved head restraint automatically pivots to a fold flat position upon unlocking of the seat, wherein the head restraint is positioned in this fold flat position during reversing seat movement, so as to reduce the seat height and clear the vehicle headliner. The head restraint is cable driven and operably connected to the seat linkages that control movement of the seat cushion and seat back during reversing movement. As such, the seat movement articulates the head restraint so that the head restraint angles forwardly toward the occupant in the forward-facing position and rearwardly toward the occupant in the rearward-facing position, while permitting the head restraint to automatically articulate to the fold flat position during travel of the seat between these two use positions.

A headrest has a base carrying the headrest on a seat, a head piece forming an abutment for a head, and a four-bar linkage including a first link and at least one second link therebehind in a direction of displacement. Each link is secured at one pivot with the base and at another pivot with the head piece such that the head piece is movable by the four-bar linkage relative to the base between a first end position and a second end position. An adjuster can alter and/or arrest the relative position between one of the links and the head piece, or between one of the links and the base. This adjuster has a first slotted link fixed on one of the first and second links, a second slotted link fixed on the head piece or the base, and a slide block engaged in slots of the first and second slotted links.

A headrest device comprises: a headrest support that is pivotable relative to a backrest frame of a vehicle seat, about a first transverse axis; a headrest frame that is pivotable relative to the headrest support about a second transverse axis; and a tilt compensation device for the headrest frame. The compensation device comprises a connecting element in two parts that are pivotable relative to one another, and first and second pivotable guide pins respectively received in a first guide path in the headrest support and in a second guide path formed by the headrest frame. The second part of the connecting element is guided in translation relative to the headrest support in a direction perpendicular to the first axis.