Inflatable head protector

A safety device for motor car passengers adapted for protecting the passenger's head in the case of collision. The safety device comprises a protective strip which unfolds itself in a spatial form generated by rotation of a U-shaped line about an axis passing through the ends of the U-shaped line. The axis is horizontal and transverse with respect to the vehicle and is at the level of the head, behind the latter. At the instant of impact, the strap is inflated by a pressurized gas and is unfolded so as to become positioned in front of the passenger's head to protect the same.