Spring arbor for use in a cassette for a vehicle safety restraint retractor

摘要

A spring arbor (4) for use in a cassette for a vehicle safety restraint retractor has a generally cylindrical shape and an axially extending slot for receiving an end of a spring. A step is provided in the profile of the arbor (4) in the region of the slot to compensate for the thickness of the spring when wound on the arbor (4).