Fastening support for signaling unit for vehicle has supporting holding forces that become stronger with increasing traveling speed

摘要

The holding forces of the fastening support are a function of the vehicle speed and depend on the traveling wind. The supporting holding forces are stronger with increasing traveling speed. The supporting holding forces are generated by one or several electric magnets and can be switched on when a certain airflow speed is reached or the forces increase in a certain range linear with the vehicle speed.