Vehicular seat belt device
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsSeigo Kuzumaki, Osamu Fukawatase
Life of this patent
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Abstract
A vehicular seat belt device includes a first pretensioner provided in a retractor and configured to apply tensile force to a shoulder belt portion of a webbing, a second pretensioner provided in a belt anchor part and configured to apply tensile force to a lap belt portion of the webbing, a third pretensioner provided in a side portion of the vehicle seat opposite to the belt anchor part and configured to apply tensile force to the lap belt portion via a buckle, and a controller. The controller is configured to activate the first pretensioner at a time of predicting vehicle collision, and activate the second pretensioner and the third pretensioner after detection of collision.
Claims12
A vehicular seat belt device comprising:
- a webbing having a first end portion that is wound on a retractor, and a second end portion that is attached to a belt anchor part disposed in a side portion of a vehicle seat, the webbing including a shoulder belt portion configured to restrain an upper body of an occupant, and a lap belt portion configured to restrain a waist region of the occupant;
- a first pretensioner provided in the retractor, and configured to apply tensile force to the shoulder belt portion when activated;
- a second pretensioner provided in the belt anchor part, and configured to apply tensile force to the lap belt portion when activated;
- a third pretensioner provided in a side portion of the vehicle seat opposite to the belt anchor part, and configured to apply tensile force to the shoulder belt portion and the lap belt portion, via a buckle with which a tongue plate is engaged, the webbing being passed through the tongue plate;
- and
- a controller configured to activate the first pretensioner at a time of predicting vehicle collision, when a seat back of the vehicle seat is in a driving state in which the seat back is stood up by an angle that is larger than a predetermined angle, and activate the second pretensioner and the third pretensioner after detection of collision.
A vehicular seat belt device comprising:
- a webbing having a first end portion that is wound on a retractor, and a second end portion that is attached to a belt anchor part disposed in a side portion of a vehicle seat, the webbing including a shoulder belt portion configured to restrain an upper body of an occupant, and a lap belt portion configured to restrain a waist region of the occupant;
- a first pretensioner provided in the retractor, and configured to apply tensile force to the shoulder belt portion when activated;
- a second pretensioner provided in the belt anchor part, and configured to apply tensile force to the lap belt portion when activated;
- a third pretensioner provided in a side portion of the vehicle seat opposite to the belt anchor part, and configured to apply tensile force to the shoulder belt portion and the lap belt portion, via a buckle with which a tongue plate is engaged, the webbing being passed through the tongue plate;
- and
- a controller configured to activate at least one of the second pretensioner and the third pretensioner, at the time of the predicting vehicle collision when a seat back of the vehicle seat is in a reclined state in which the seat back is tilted by an angle that is larger than a predetermined angle that is in a driving state, and then activate the first pretensioner.
Dependencies are inferred from the claim text.