Patent ID: 6131843
Filing Date: 2000-10-17
Classification: B60R

Abstract:
A safety belt retractor mechanism comprising:a housing;a spool rotatably mounted in said housing;a safety belt wound onto said spool in a retracted position;a locking mechanism locking said spool in order to prevent further rotation of said spool when an accident occurs;a load-limiting device enabling belt pull-out from said spool to a limited extent after activation of said locking mechanism;said load limiting device comprising a torsion bar having a first and a second end;said torsion bar connected with said first end to said spool and with said second end to said locking mechanism;a rotation-limiting device for limiting an angle of rotation of said spool relative to said locking mechanism;said locking mechanism comprising a locking head having a locking element;said locking head connected to said torsion bar and thereby connecting said spool to said locking mechanism;said rotation-limiting device located between said locking head and an end face of said spool facing said locking head;said rotation-limiting device constituting a load-transmitting connection between said spool and said locking head after said angle of rotation of said spool relative to said locking head has been completed;frangible means securing said locking head in a predetermined position on said spool and adapted to break when subjected to a predetermined force.