Autoliv Development Ab

Matthias Borgward

Andreas Lucht

Gerhard Siebrand

Sébastien Baudinet

Eckhard Alpers

Henry Knop

A reversible seat belt tensioner includes an electric motor (), a belt shaft () drivable in the belt winding direction by the electric motor () via a drive wheel (), and a drive shaft () transmitting the rotational movement of the electric motor () to the drive wheel (). The drive shaft () is connected to at least one of the drive wheel () and the electric motor () via a helical gear unit. The use of a helical gear unit provides the advantage that the rotational axes of the meshing components can be arranged at angles other than 90 degrees with respect to each other because the components in the helical gear units only come into punctiform contact.

Reversible seat belt tensioner

A belt lock is provided and has a lock holder that is rotatably mounted on a vehicle part. A restoring spring, as a flat spiral spring, has spiral spring windings that are disposed in a single plane and are disposed between a cover and the lock holder. The spiral spring biases the lock holder into a rest position of the belt lock, and has one end supported against the lock holder and another end supported against the cover. The cover has a first radially extending extension for the outer end of the spring, and a second extension as a stop for restoring of the lock holder.

Growing community of inventors

Hamburg, Germany

Matthias Borgward