| 摘要 |
<p>An emergency locking retractor includes a locking device (10,20,24,26,28,30) for locking a belt spool (12) when actuated, a webbing sensor (33) and vehicle sensor (35) for detecting an emergency condition, an emergency-lock actuator (34,42) for actuating the locking device in response to the webbing sensor (33) and/or vehicle sensor (35) detecting the emergency condition, and an auto-lock actuator (46,52,56,58,60) for actuating the locking device when a full length of the webbing (14) is unwound from the belt spool. The locking device has a cam wheel (30) rotatable with the belt spool (12) and formed with a plurality of ratchet teeth (30d) on an outer periphery thereof. The cam wheel (30) is prevented from rotation in a predetermined direction when the locking device is actuated. The auto-lock actuator has a tooth member (46) pivotally installed for engagement with one of the ratchet teeth (30d) of the cam wheel (30) in the event of actuation of the locking mechanism by the auto-lock actuator. The auto-lock actuator has a locating device (60) for preventing a tooth (46) in engagement with one of the ratchet teeth (30d) from jumping up therefrom and being erroneously disengaged from the ratchet teeth (30d) when the cam wheel (30) is caused to rotate at a high speed in response to rapid unwinding of the webbing (14) from the belt spool (12). In one embodiment, the locating device is constituted by a leaf spring (60) having an angled end portion (60a) and a correspondingly angular cam surface (46a) at a pivotal end of the tooth (46). <IMAGE></p> |
