Belt retractor including a switchable belt force limiter

摘要

A belt retractor (10) comprising a frame, a belt reel, a first force limiting means (30) coupled to the belt reel and a second force limiting means (32), wherein the second force limiting means (32) can be locked and the first force limiting means (30) is arranged functionally in series with the second force limiting means (32), is characterized in that the second force limiting means (32) includes a deformation element (52) and at least one deforming member (26, 54) fixed to the frame, the deformation element (52) being adapted to be rotated relative to the deforming member (26, 54) when the second force limiting means (32) is activated, whereby the deformation element (52) is deformed.

主权项

1. A belt retractor (10) comprising a frame having a side member defining a first fixed deforming member (26), a belt reel (12) rotatable about an axis, a first force limiting structure (30) coupled to the belt reel (12) and a second force limiting structure (32), the second force limiting structure (32) being adapted to be locked and the first force limiting structure (30) being functionally arranged in series with the second force limiting structure (32), wherein the second force limiting structure (32) includes a deformation element (52) and a second fixed deforming member (54) comprising a disk that is secured to the first fixed deforming member (26), the deformation element (52) being positioned axially between the deforming members (26, 54) and being rotated with the belt reel (12) about the axis of the belt reel (12) relative to the deforming members (26, 54) upon activation of the second force limiting structure (32), whereby the deformation element (52) is deformed, the deformation element (52) being ring-shaped and the deforming members (26, 54) deforming the deformation element (52) in an axial direction, each of the deforming members (26, 54) including a plurality of projections (58, 60) that extend axially towards the deformation element (52) for deforming the deformation element (52) when the deformation element (52) rotates relative to the deforming members (26, 54), at least one of the plurality of projections (58, 60) having a rounded protrusion on one side of the respective deforming member (26, 54) and a corresponding indentation in another side of the respective deforming member (26, 54) opposite the rounded protrusion.