SEAT BELT RETRACTOR, AND SEAT BELT DEVICE HAVING THE RETRACTOR

摘要

Provided is a seat belt retractor, in which a cylindrical rotor (24) of an electric motor in a spool is axially halved into two members, that is, a first rotary drive member (24a1) and a first rotary shaft member (24b1), and a second rotary drive member (24a2) and a second rotary shaft member (24b2), and these two members are jointed. The torsion portion (42a) of a torsion bar (42) is axially inserted into and through an internal hole (24b11) of a rotary shaft member (24b) composed of first and second rotary shaft members (24b1) and (24b2). As a result, the torsion bar (42) can be easily assembled in the rotor (24), even if the maximum external diameters of first and second head portions (42b) and (42c) of the torsion bar (42) are set larger than the internal diameter of the internal hole (24b11).