Patent attributes
A seat belt pretensioner includes a pretensioner main body disposed at a side of a seat cushion, a moving member connected to an end of a seat belt, a wire for connecting the pretensioner main body with the moving member, and a containing cover for covering the moving member and the wire. The pretensioner main body generates a tension force by reacting with a deceleration of a vehicle exceeding a constant value, the pretensioner main body. The wire transmits the tension force therethrough to the seat belt to pull the seat belt into the pretensioner main body. The containing cover includes a lower portion attached to the pretensioner main body and an upper portion having a through port for allowing the end of seat belt to pass therethrough.