Abstract: A child seat system with at least one child seat configured for an at least substantially upright-sitting child and with an infant carrier configured for a lying-down small child, wherein the infant carrier is configured to be accommodated in the child seat. The infant carrier is at least substantially implemented by a hard shell.

Abstract: A vehicle seat device, in particular a child seat device, includes at least one head support unit and/or at least one seat cover unit, and also includes at least one shoulder cushion unit. In order to achieve a high degree of seating comfort, the shoulder cushion unit is connected directly to the head support unit and/or to the seat cover unit.

Abstract: A vehicle child seat is provided for directly or indirectly fastening to a vehicle seat and/or a vehicle structure. The vehicle child seat includes a backrest, a seat surface, an integrated belt system for fastening a child in the vehicle child seat and a belt tensioning device (31). The belt tensioning device (31) includes a trigger sensor, an energy storage device and a tensioning mechanism which, when exceeding a defined force acting on the vehicle child seat, in particular a crash force, abruptly tensions the belt system. All components of the belt tensioning device (31) required for the belt tensioning function being fastened to or in the vehicle child seat and being able to be removed therewith from the vehicle. A belt force limiting function is incorporated in the belt tensioning device (31).

Abstract: The invention is directed to a reboard system comprising a steeply inclined backrest for transporting infants and toddlers approximately in a half-lying, half-sitting posture, particularly in a car opposite the direction of travel thereof, it being possible to vary the length of the backrest in the direction of the spine of an infant sitting in the reboard system when a child is in the reboard system and/or when the reboard system is fastened to a seat of a car opposite the direction of travel thereof, by a guided parallel shift of an extendible part of the backrest relative to said seat surface along a straight line, which is inclined by a constant acute angle ? against the horizontal plane in the direction of travel, whereby the extendible part (10) of the backrest (6) is provided with upper lateral body rests (12) for substantially guiding the shoulders and/or upper arms of the infant during the travel in a car.