| 摘要 |
A vehicle sensitive retractor control system having reduced sensitivity to Z-axis acceleration. The retractor control system incorporates a rolling ball mass which, in its resting position, acts on a locking lever to prevent it from engaging a ratchet wheel of the seat belt retractor spool. The locking lever has its center of gravity positioned to urge it to move into a locking engagement position with the ratchet wheel. In response to accelerations in the horizontal plane, the rolling ball mass becomes unseated from its resting position and no longer contacts and influences the locking lever, enabling it to lock the retractor. In response to Z-axis acceleration, the ball mass becomes unseated out of contact with the locking lever. An auxiliary mass may be provided which acts on the locking lever in the event of a rollover to force the locking lever into the locking position.
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