| 摘要 |
PCT No. PCT/GB97/00614 Sec. 371 Date Jan. 21, 1999 Sec. 102(e) Date Jan. 21, 1999 PCT Filed Mar. 5, 1997 PCT Pub. No. WO97/32760 PCT Pub. Date Sep. 12, 1997A retractor for a vehicle restraint system has a locking mechanism comprising an additional inertia member (7) which decouples from the webbing spool when a predetemined acceleration or deceleration force is exceeded, due to the pretensioning operation taking place, and operates a locking pawl (3) to prevent further movement of the spool. The locking pawl (3) is then positively held in the locking condition using a spring catch (9) integral with the inertia member (7), or it can be spring biased in the locking condition using a spring displacing the inertia member (7) against the locking pawl (3) once shear pins (8) have been destroyed. This prevents webbing payout in a multiple crash situation, and provides a positive indication that the pretensioner has fired.
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