Seatbelt retractor and seatbelt device equipped with the seatbelt retractor

摘要

In order to provide a small-size seatbelt retractor in which a limit load applied to a seatbelt can be set more flexibly in accordance with the conditions of an emergency situation, a supporting shaft portion (4a) of a spool (4) is provided with a second energy-absorbing mechanism (41), which is concentric with the spool (4). In an emergency situation, a clutch pawl (46) engages to ratchet teeth (43a) of a first energy-absorber support member (43), and the first energy-absorber support member (43) rotates in a belt-withdrawing direction together with the spool (4). On the other hand, a second energy-absorber support member (44) is locked by a lever (50) of an operation controller (48), such that the second energy-absorber support member (44) is non-rotatable. Thus, the energy absorber (42) becomes deformed, whereby the second energy-absorbing mechanism (41) absorbs the impact energy together with the torsion bar (7).