Patent ID: 11932196
Assignee: AUTOLIV DEVELOPMENT AB
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 17:
18. A belt retractor for a seat belt of a motor vehicle having
a belt shaft rotatably mounted in a housing frame,
a profiled head which can be locked in relation to the housing frame; and
a multistage first force-limiting device, wherein the multistage first force-limiting device is coupled on the one hand to the profiled head and on the other hand to the belt shaft, and wherein the multistage first force-limiting device allows a force-limited rotation of the belt shaft relative to the locked profiled head,
wherein an actively triggerable decoupling device is formed such that the belt shaft can be uncoupled from the force limiter of the multistage first force-limiting device by the decoupling device,
wherein the multistage first force-limiting device comprises an actively triggerable switching device such that the force-limited relative rotation of the belt shaft can be switched from a first stage to a second stage, and
wherein the switching device comprises at least one pawl and one shaft ring, wherein the pawl is held in an initial state by the shaft ring in a position coupling the belt shaft to a second force-limiting element of the multistage first force-limiting device.