STEERING WHEEL AIRBAG
A steering wheel airbag, arranged to cover a steering wheel when inflation is completed, includes: a front-collision receiving surface which is arranged on a side of a driver when inflation is completed, so as to receive the driver moving forward during a head-on collision of a vehicle, the front-collision receiving surface being arranged substantially along a vertical direction to be tilted with respect to a ring surface of the steering wheel when inflation is completed; and arm restraining parts which are arranged near arms of the driver steering a ring part of the steering wheel on both right and left sides of the front-collision receiving surface when inflation is completed, the arm restraining parts coming into contact with the arms during an oblique collision or an offset collision of the vehicle, so as to prevent a movement of the driver to an obliquely front side.
1 . A steering wheel airbag which is inflated by allowing inflation gas to flow therein, and is arranged to cover a steering wheel when inflation is completed, the steering wheel airbag comprising:
a front-collision receiving surface which is arranged on a side of a driver when inflation is completed, so as to receive the driver moving forward during a head-on collision of a vehicle, the front-collision receiving surface being arranged substantially along a vertical direction to be tilted with respect to a ring surface of the steering wheel when inflation is completed; and
arm restraining parts which are arranged near arms of the driver steering a ring part of the steering wheel on both right and left sides of the front-collision receiving surface when inflation is completed, the arm restraining parts coming into contact with the arms during an oblique collision or an offset collision of the vehicle, so as to prevent a movement of the driver to an obliquely front side.
2 . The steering wheel airbag according to claim 1 , further comprising:
an airbag body having a bag shape; and
a tether which is arranged in the airbag body to regulate an inflation completion shape of the airbag body, wherein:
the airbag body includes a driver-side wall part forming a front-collision restraining surface and a vehicle-side wall part which is arranged on a side of the steering wheel to face the driver-side wall part when inflation is completed, and is provided with an inflow opening for allowing the inflation gas to flow therein in the vehicle-side wall part; and
the tether connects the driver-side wall part and the vehicle-side wall part in an area which is on a rear side from the inflow opening in an axis-orthogonal direction of a steering shaft for assembling the steering wheel, so as to regulate a thickness of a rear area of the airbag body at the time of completion of inflation when the airbag body is inflated completely.
3 . The steering wheel airbag according to claim 2 , wherein
the tethers are arranged in a belt shape in two places substantially symmetrical in a right and left direction with the inflow opening as a center, and are arranged to be tilted with respect to the right and left direction such that end edge parts positioned on right and left outer sides are positioned on the front side from central edge parts positioned on right and left inner sides when the airbag body at the time of completion of inflation is viewed from above along the an axial direction of the steering shaft.
4 . The steering wheel airbag according to claim 1 , further comprising:
an airbag body having a bag shape; and
a tether which is arranged in the airbag body to regulate an inflation completion shape of the airbag body, wherein:
the airbag body includes a driver-side wall part forming a front-collision restraining surface and a vehicle-side wall part which is arranged on a side of the steering wheel to face the driver-side wall part when inflation is completed, and is provided with an inflow opening for allowing the inflation gas to flow therein in the vehicle-side wall part; and
the tether is arranged to connect a substantially center of the front-collision restraining surface in the driver-side wall part and a vicinity of the inflow opening in the vehicle-side wall part, so as to secure a flat state near the substantially center of the front-collision restraining surface when the airbag body is inflated completely.