| 摘要 |
A vehicle seat back assembly is provided with: a seat back frame including, at both sides thereof, at least side frames; a head rest support member supported with upper distal ends of the side frames to be rotatable; a pressure receiving member supported with the head rest support member and remaining in a position to receive an impact load caused by a rear-end collision of a vehicle; a head rest holder supported with the head rest support member; and a head rest supported with the head rest holder to be moveable in upper and lower directions. The head rest support member has an upper wall segment, a rear facing wall segment bent from the upper wall segment and extending downward, and a support section supporting the head rest holder at the upper wall segment and a portion extending from the rear facing wall segment.
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