Patent ID: 7661712
Filing Date: 2010-02-16
Classification: B60R

Abstract:
1. A seat belt retractor comprising: a spool for winding up a seat belt, a locking mechanism having a locking member that is prevented from rotating in a belt withdrawing direction in the event of an emergency, and a seat belt load limiting mechanism for limiting load applied to the seat belt when the spool rotates relative to the locking member, the load limiting mechanism comprising: a torsion bar that rotationally connects the spool and the locking member and is torsionally deformable when the spool rotates relative to the locking member, and a shearing member that is disposed to extend both in the spool and the locking member, the shearing member being shear-deformable when the spool rotates relative to the locking member, wherein at least a portion of the area of the shearing member positioned in the spool is fixed to the spool in the axial direction.