Patent ID: 11919467
Assignee: AUTOLIV DEVELOPMENT AB
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A driver seat airbag device, comprising:
an inflator stowed in a steering wheel of a vehicle; and
a cushion stowed in the steering wheel with the inflator that uses gas supplied from the inflator to expand and deploy, the cushion configured to deploy between the steering wheel and an occupant in a driver seat; wherein
the cushion includes:
a steering wheel side panel positioned on a steering wheel side,
an occupant side panel having a larger surface area than the steering wheel side panel positioned on an occupant side, and
a side surface panel that connects the steering wheel side panel and the occupant side panel and forms a side surface of the cushion;
the occupant side panel includes:
a depressed section recessed towards the steering wheel side, and
a bulged section positioned surrounding the depressed section that bulges in a ring shape toward the occupant side; where
a prescribed location of the occupant side panel is pulled to the steering wheel side by tethers including:
a pair of main tethers positioned inside the cushion that span between the steering wheel side panel and the occupant side panel and have dimensions such that upon being tensioned during expansion and deployment of the cushion, pull the occupant side panel toward the steering wheel side, and
a pair of sub tethers positioned inside the cushion that span between a mid-section of the pair of main tethers and the occupant side panel and have dimensions such that upon being tensioned during expansion and deployment of the cushion, pull the occupant side panel toward the mid-section of the pair of main tethers; where
the pair of main tethers are separated and connected to edges of the depressed section of the occupant side panel;
the pair of sub tethers are separated and connected from the mid-section of the pair of main tethers to an inside of an edge of the depressed section such that the depressed section forms a center area closest to the steering wheel and a first inclined area inclined in a flared shape from the center area toward the occupant side and the bulged section forms a second inclined area that is continuous with the first inclined area and is inclined in a flared shape toward the occupant side; and

the cushion is configured to restrain a head of the occupant with the center area and the first and second inclined areas.