| 摘要 |
A seat belt retractor (20): comprising a spool (25), a frame (52) for rotationally supporting the spool, a seat belt (16) receivable on the spool, a rewind spring (100) for biasing the spool in a belt winding direction comprising a spring coil (100) having an inner spring end (103) connected to and rotated by a shaft (56) movable with the spool and an outer spring end (104) and a rotatable spring cup (70,72, 80, 81) connected to the outer spring end in continuous connection with the retractor shaft (56) for unwinding a predetermined number of coils from the spring coil in relation to the rotation of the shaft and reducing the rewind force or tensions applied to the shoulder of an occupant.
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