| 摘要 |
<p>An emergency locking retractor for a vehicle occupant restraint belt comprises a locking mechanism having an inner disc that is received on the reel shaft for axial movement toward and away from a side frame member in which the reel is supported, an inertia spring that normally holds the inner disc in an outward position in which the mechanism is unlocked, and an outer disc fixed on the shaft against axial outward movement away from the frame. One of the two discs is rotatable relative to the shaft, while the other rotates with the shaft, and coating cam elements on the inner and outer discs shift the inner disc toward the frame when the reel is pulled out abruptly and engage coacting locking ratchet teeth on the inner disc and the frame to stop the inner disc from rotating. The reel shaft is locked to the inner disc by a flange on the shaft having lugs that fit into locking slots in the inner disc. A third set of ratchet teeth on the circumference of the rotatable disc are engageable by the pawl of an inertia-responsive device and initiate the same locking operations as the abrupt pulling out of the belt produces.</p> |
