| 摘要 |
A frame structure of a seatback for a vehicle includes a first frame including at least two panels and a divided portion therebetween and a second frame including tubing and bonded to the first frame substantially along a periphery of the first frame. The second frame includes an elongation deformation allowing portion for allowing a portion of the second frame to be elongated over the divided portion of the first frame in an upper side portion when a predetermined load is exerted on the seatback toward a rear of the vehicle.
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