| 摘要 |
The disclosed seatbelt retractor and seat belt apparatus may comprise a spool for retracting a seatbelt, a torsion bar arranged radially inside of the spool, a pretensioner for generating a rotational drive force for rotating the spool in a seatbelt retracting direction during a state of emergency; and a relay locking mechanism. The relay locking mechanism may be configured for locking the spool so as to restrict the rotation of the spool in the seatbelt withdrawing direction in the normal state and configured for unlocking the spool while locking an axial side of the torsion bar so as to restrict the rotation of the torsion bar in the seatbelt withdrawing direction in the state of emergency.
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