| 摘要 |
PURPOSE: To obtain an easily producible vehicle seat with required physical properties, by composing the seat by a back plate surrounded in a frame shape by a frame and the frame by aside member and a lateral member with a U-shaped cross section and integrally forming the back plate and a member into a single molding by injection. CONSTITUTION: This support structure 1 of a back rest is a molding made of polyamide-6 with 35wt.% of glass fiber content by injection molding. A frame 2 comprising side members 5, 4 and a lateral member 5 surrounds a back plate 6. The side members 3, 4 have a U-shaped cross section and each has a front side face 7, a central part 8, and a back side face 9. Formed protrusions 11 are arranged in a cavity made in such a manner. A reinforcing material 12 is attached on a lower area of a cavity 10 of the side members 3, 4, and an attaching tool and a member for adjusting the tilting angle of the back rest are connected by the same. The side member 5 is closed at the back, the cross section is a U-shaped form and comprises a wide central part 13, upper side face 14 and a lower side face 15, and connects the upper ends of the side members 3, 4.
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