A seat belt pre-tensioning device.

摘要

A seat belt pre-tensioning device is adapted to be mounted on a vehicle and includes a buckle (12) to receive a seat belt buckle. The device incorporates means (28, 50, 60) which are responsive to a predetermined deceleration of the vehicle and which move to permit spring-loaded means (23, 48) to apply a force to move the buckle (12) to apply a tension to the seat belt means.