US 7,731,292 B2Granted

Seat back frame for a vehicle

AssigneesToyota Jidosha Kabushiki Kaisha, Toyota Boshoku Kabushiki Kaisha

InventorsTakahiro Ishijima, Kouji Kaneda

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Abstract

At a side portion 22 of a seat back frame, not only does a rear first extending portion 52 bend and extend from a frame side plate portion 30 toward a seat back inner side at an obtuse angle, but also, in a vicinity of a central portion of a rear flange portion 50, a rear second extending portion 54 bends and extends from the rear first extending portion 52 further toward the seat back inner side. Therefore, even if a relatively large load toward a rear of a vehicle acts on the seat back frame and compressive stress is generated at an intermediate portion of the rear flange portion 50 in a heightwise direction of a seat back, it is difficult for cross-sectional collapsing to arise, and the load can be effectively supported at the frame side plate portion 30. There can be provided a seat back frame for a vehicle which can suppress an amount of bending deformation at the time of a rear collision, without leading to an increase in weight.

Claims6

Dependent claims

A seat back frame for a vehicle comprising:

a frame side plate portion, which is disposed in a transverse direction side portion at a seat back and generally includes a plane which is parallel to a seat front-back direction;
and
flange portions extending toward a seat back inner side from a front end portion and a rear end portion of the frame side plate portion respectively, wherein at least one of the front and rear flange portions includes a first extending portion bent at an obtuse angle from the frame side plate portion toward the seat back inner side, and extending to a vicinity of a central portion of the flange portion, and a second extending portion bent and extending from the first extending portion toward the seat back inner side,
wherein
the at least one of the front and rear flange portions extends such that an angle formed by the frame side plate portion and an imaginary line, which connects a distal end portion of the flange portion and a bent inner side portion from the frame side plate portion toward the flange portion, is an obtuse angle, and the second extending portion is bent so as to form an obtuse angle toward the seat back inner side with respect to the first extending portion.

2 more elements

Dependencies are inferred from the claim text.