| 摘要 |
A base plate portion 21 directly receiving face pressure of the airbag is provided with a steel plate 31 made of a metal, and a stack portion 33 having a resin layers 32 made of synthetic resin and overlapping both faces of the steel plate 31. It possible to uniformly generate stress on both faces of the steel plate 31 in contraction at the time of molding while ensuring sufficient strength against the expansion pressure of the airbag, so that it is possible to suppress deformation in a cooling process after the molding and dimensional stability is high. The peripheral wall portion 22 is able to ensure sufficient strength even when it is integrally formed with each resin layer 32 of the base plate portion 21 in the form of a single layer.
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