HEADREST WITH AN EXPANSION MECHANISM

The object of the invention is to provide a headrest (1) with an expansion mechanism comprising a middle portion (2) and at least one side portion (3), wherein a vertical axis (9) of the middle portion (2) extends through the middle of the middle portion (2). The middle portion (2) comprises a supporting structure (6) and an activation element (11) connected to a control unit (10). The side portion (3) comprises a guiding structure (7) of an arcuate shape slidingly arranged in the supporting structure (6) having a retracted position and an extended position. The guiding structure (7) of the at least one side portion (3) extends beyond the vertical axis (9) of the middle portion (2) in the retracted position. Preferably, the headrest (1) comprises two side portions (3) adjustable to the retracted and the extended position.