REVERSIBLE BELT TIGHTENER
The invention relates to a reversible belt tightener comprising: - an electric motor (2); - a belt shaft (1) onto which a safety belt can be wound; - a driving wheel (10) that is coaxial to the belt shaft (1); and - a coupling (11) between the belt shaft (1) and the driving wheel (10). The electric motor (2) includes a protruding drive shaft (12) via which the electric motor (2) is connected directly to the driving wheel (10).