US 11,745,695 B2
Pedestrian airbag device
Makoto Ozeki, Kiyosu (JP); Akira Yasuda, Kiyosu (JP); Taizo Suemitsu, Kiyosu (JP); and Kimihiko Hyodo, Kiyosu (JP)
Assigned to TOYODA GOSEI CO., LTD., Aichi-pref. (JP)
Filed by TOYODA GOSEI CO., LTD., Kiyosu (JP)
Filed on May 4, 2022, as Appl. No. 17/736,406.
Claims priority of application No. 2021-84921 (JP), filed on May 19, 2021.
Prior Publication US 2022/0371542 A1, Nov. 24, 2022
Int. Cl. B60R 21/36 (2011.01)
CPC B60R 21/36 (2013.01) 7 Claims
OG exemplary drawing
 
1. A pedestrian airbag device, comprising:
an airbag, which is housed folded in a housing region disposed in a vicinity of a rear end of a hood panel of a vehicle; and
an inflator that supplies an inflating gas to the airbag, wherein
the airbag is configured in such a way as to cover an upper face side of at least a region from a rear end side of the hood panel to a cowl when inflation is completed, includes a vehicle body side wall portion disposed on a body side when inflation is completed and a pedestrian side wall portion disposed opposing the vehicle body side wall portion, and is of a configuration wherein an internal pressure maintenance chamber enclosed by a peripheral wall coupled to the vehicle body side wall portion and the pedestrian side wall portion is disposed in one portion of an internal region,
the internal pressure maintenance chamber is configured in such a way that an inflating gas discharged from the inflator can flow into an interior via a general inflating portion in the airbag, and a check valve mechanism that prevents a backflow to a general inflating portion side of the inflating gas that has flowed into the interior is disposed in the internal pressure maintenance chamber,
the internal pressure maintenance chamber includes a bottom wall portion disposed in such a way as to coincide with the vehicle body side wall portion by closing off an inner side of the peripheral wall, wherein a predetermined place of the bottom wall portion is coupled to the vehicle body side wall portion, and
the check valve mechanism includes a gas inflow port formed by one portion of the bottom wall portion being cut away, a joining region that causes the bottom wall portion to be joined directly to the vehicle body side wall portion in a peripheral edge of the gas inflow port, and a peripheral edge region of the gas inflow port in the bottom wall portion.