Belt retractor for a seat belt system

摘要

A spindle ( 2 ) of a seat belt retractor is rotationally driven when required by a motor ( 5 ) to the webbing take-up direction side through a power transmission mechanism section ( 6 ). Further, the spindle ( 2 ) is always connected to a take-up spring ( 7 ) and is always subjected to rotational power acting to the webbing take-up side. The structure enables a user wearing a seat belt to be restrained even in failure, realizing a safer and more reliable restraining device.