Seat belt retractor

摘要

A vehicle sensitive retractor has an inertia weight carried on a spring arm which deflects and allows overtravel of the inertia weight and during this overtravel the weight continues to urge a pawl mechanism into blocking relationship with ratchet wheels on a belt reel. This extra period of time is particularly useful in maintaining actuation of the pawls toward the reel blocking position if the pawls initially abut the other ends of the ratchet teeth without entering between adjacent ratchet teeth. The spring arm may comprise a colied spring section supporting the inertia weight at its lower end or the spring arm may be in the form of a plastic spring.