| 摘要 |
To provide a seat belt retractor (1) that meets the recent needs and can optimize the energy absorption characteristics easily the retractor (1) has a spool (4) for winding a seat belt (3), a torsion bar (5) formed of material that can be twisted and deformed, a locking mechanism (7) for preventing the spool (4) from rotating at least in the direction of unwinding the seat belt (3), a ring (19) disposed inside an end portion of the spool (4), and a plate member (20) which can be twisted and deformed. A first end (20a) of the plate member (20) is fixed to the periphery of the ring (19). A second end (20b) of the plate member (20) is engaged with the internal surface of the thick cylinder portion (4b) of the spool (4) so as to be capable of being disengaged. <IMAGE>
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