Method for activating head safety belt in vehicle with safety interlock on main belt clasp to block the head belt if the main belt is not secured

摘要

A method for activating a head safety belt in a vehicle has separate reels for the head belt and the main belt. A safety interlock in the main belt clasp monitors the secure fitting of the main belt and releases the block on the head belt system. This prevents head and spine injuries if the head belt is activated in a collision without the main belt correctly fitted.