Patent attributes
A pretensioner with a wire-holding groove is formed in a housing at a bent portion, so that a wire, which holds a seat belt buckle at an upper end protruding from the wire-holding groove, is slidably held by the wire-holding groove. The wire slides and is displaced in a draw-in direction of the seat belt buckle when a gas generator is actuated and acted on a part of the wire closer to an end thereof, which extends in a front-to-back direction of a vehicle. The tongue piece bulging into the wire-holding groove restrains the wire from being pushed in due to a push-in load of the wire from the seat belt buckle. Conversely, the wire is allowed to be drawn in upon the actuation of the gas generator such that the pretension can enhance the reliability of a restraining function of a push-in displacement of a wire.
