| 摘要 |
First and second spoke cores are arranged linearly through the boss plate so that most of the lower ends of the first and second spoke cores are located above a middle line. A third spoke core is arranged in a direction perpendicular to the first and second spoke cores. A pair of tine portions are provided in the third spoke core so as to be connected to the first and second spoke cores, thereby the tine portions and the first and second spoke cores intersect each other obliquely. In the tine portions, through holes and reception seats are provided so that the air bag module is fixed with screws and the through holes while the air bag module abuts on the reception seats.
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