| 摘要 |
<p>The utility model provides a seat back frame structure of a vehicle seat. By means of the seat back frame structure of the vehicle seat, dimensional accuracy of the whole seat back frame can be maintained even though length dimensions of lateral frames and an upper frame are not accurate. A seat back frame is provided with the upper frame (31) serving as the upper side of the box shape and the lateral frames (33) serving as the left side and the right side. A bracket (70) for installing a safety belt guide part of a safety belt unit is arranged at the intersection of the upper frame (31) and the lateral frames (33). The lateral frames (33) and the upper frame (31) are in welding join relative to the bracket. Flange portions (73a) extending to the front upper frame (31) are arranged on the bracket (70), recessed portions (73b) corresponding to the round shape of the section of the upper frame (31) are formed at the end of the flange portions (73a), and the upper frame (31) is joined with the bracket (70) through welding when the upper frame (31) is jogged with the two recessed portions (73b).</p> |
