In a belt shaft (12) of a belt retractor (42) of a seat belt comprising a base member (10) extending in the longitudinal direction of an axis of rotation (D) to which the seat belt is fastened, the base member (10) is a stamped and bent part.

A multi-point seat belt safety apparatus and system and device that automatically moves, adjusts, or otherwise corrects itself around one or more webbing deflection points, and utilizes different components, to accommodate seat occupants with different sizes and ages. In particular, when an occupant extends the webbing across their torso towards an anchor point, generally disposed to the near the side of their waist, the webbing first contacts the torso/shoulder of the occupant at a particular distance above the seat, which is reflective of the occupant's height, causing the webbing to automatically move along a length of a deflection element, positioned at, above, or near the shoulder of the seat occupant, to an appropriate deflection point. At such, the webbing is kept at a proper location, away from the neck of the occupant.

A 3-point seat belt system having a seat belt retractor (20) with a spool (32), the spool (32) having a locked mode of operation and a freewheeling mode of operation; a seat belt (411) characterized as having a known elongation rate under stress; a collapsible member (40) wrapped about a center portion of the spool (32) of the retractor (20), the member (40) having an initial diameter dl when unstressed and collapsible to a lesser diameter of d2 under stress. The method having the step of generating a retarding force on the occupant (404) in proportion to the degree by which the collapsible member (40) collapses.

In a buckle device, a sewn part of a belt is wound around a spool. Here, the sewn part is disposed in an upper peripheral region and a left peripheral region of the spool. Therefore, even though a winding radius of the belt is increased by the sewn part, it is possible to suppress an occurrence of a situation in which a left covering part and a right covering part of a boot are displaced outward in a vehicle width direction of the boot by the belt, and it is possible to reduce a size of the buckle device in the vehicle width direction.

A belt reel (14) for a belt retractor (10) has a rotational axis (R) and a reel body (16) that is provided as a reel for a webbing (24) and has a first axial circumferential circle (34). The reel body (16) further includes a radial constriction (32) having a second axial circumferential circle (36), wherein the constriction (32) is arranged centrally on the reel body (16) in the axial direction (A) and wherein the circumference of the second axial circumferential circle (36) amounts to a maximum of 95% of the circumference of the first axial circumferential circle (34). Moreover, a belt retractor (10) comprising such belt reel (14) is described.

The invention relates to a belt retractor for a seat belt of a motor vehicle, comprising: a belt shaft which is rotatably mounted in a housing frame, wherein the belt shaft comprises an exit slot; a belt webbing, wherein one end of the belt webbing is fastened in the belt shaft and the belt webbing is guided out of the belt shaft through the exit slot; a profile head which can be locked in relation to the housing frame; and a force-limitation device which is at least in part arranged in the belt shaft, wherein the belt webbing abuts the force-limitation device in the circumferential direction for 180 or more, wherein the force-limitation device has multiple stages.