| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve safety of a seat back.SOLUTION: Turning support parts 37, 38 disposed on an upper part of a seat back board 30 and a support bar 17 of a seat back frame 10 are locked. Pawls 31, 32 for lower part fitting disposed at a lower part of the seat back board 30 and fitting holes 121, 122 of the seat back frame 10 are locked. When a load is applied to the seat back board 30 in a direction from a front side to a rear side of the vehicle, recess parts of the respective locking pieces of the pawls 31, 32 for lower part fitting are broken, and the locked state of the pawls 31, 32 for lower part fitting and the fitting holes 121, 122 are released. With a shaft center of the support bar 17 as a turning center, the seat back board 30 is turned in a rear side of the vehicle via the turning support parts 37, 38.</p> |
