PROTRACTIVE FORCE RESPONSIVE SAFETY BELT LOCKING APPARATUS

摘要

A locking seat belt retractor (10) has a retractor reel (14) slidably mounted on the frame (12) for movement between an extended position and a retracted position. A spring (40) biases the retractor reel toward the retracted position. The reel is movable to the extended position by a protraction force on the safety belt webbing exceeding a threshold amount predetermined by the bias force of the spring. A clamp (46) is mounted on the frame and has the safety belt webbing passing through it for selectively clamping the safety belt webbing against further movement relative to the clamp. The clamp includes a wedge (54) to engage the belt.