System (1) comprising: two rods (2), at least one of said rods comprising at least one locking notch (4) in sliding; at least one sheath for receiving (6) a rod (2) notched in sliding, said sheath comprising a sliding sleeve (7) and, secured to said sleeve...

The device has a head-rest including reinforcement (3) with a tubular metal rod (4) that assembles the reinforcement on a backrest (5) of a seat. A sheath (8) slidingly receives the rod, and a drawer (9) is mounted at sheath top and equipped with an engage...

The device has a retention harness i.e. seat belt, comprising a left shoulder strap (6) and a right shoulder strap (7). A neck cushion (15) is fixed at a head part and comprises a left side inflatable part and a right side inflatable part. The left and rig...