| 摘要 |
<p>A seat back frame includes: a first side member and a second side member each formed into an elongated shape along an up-and-down direction of a seat back so as to support each side portion of the seat back; and a belt guide portion on which tension of a seat belt is applied when the seat belt is pulled, the belt guide portion being formed in an upper portion of the first side member and guiding the seat belt having the one end retained by a seat belt retaining member. The first side member is formed of a sheet of steel plate and includes: a side member side wall portion formed in parallel to a direction of application of the tension of the seat belt on the belt guide portion and formed continuously along a longitudinal direction of the first side member; a side member front wall portion formed on a front side of the vehicle with respect to the side member side wall portion; and a side member rear wall portion formed on a rear side of the vehicle with respect to the side member side wall portion, the first side member having an open cross-sectional shape.</p> |
