| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a seat back frame structure of a vehicle seat for strengthening rigidity of a seat back frame, without causing an increase in the number of part items and complication of a constitution. <P>SOLUTION: In this seat back frame structure of the vehicle seat, a lower frame 20 has a rear part piece 20A extending by superposing right-left end parts on an inner surface 10Cb of a rear surface flange 10C. A welding position of the lower frame 20 to the rear surface flange 10C of a side frame 10 is also set as inner-outer two rows of an inner row along the inner edge of the rear surface flange 10C of the side frame 10 and an outer row along the loose edge of the rear surface flange 10C, and a vertical position in welding A of the inner row and welding B of the outer row is set as a laterally alternate zigzag position. <P>COPYRIGHT: (C)2012,JPO&INPIT |
