| 摘要 |
An object of the present invention is to provide a seat back frame structure (112) for a vehicle and a seat (100) for a vehicle with such a seat back frame structure (112) which are capable of securing a necessary strength or rigidity, while at the same time attaining the decrease of its weight and its cost. There is provided a seat back frame structure (112) of a seat (100) for a vehicle comprising a seat back frame structure (112) a lower end of which is connected to a rear end of a seat cushion frame structure (104) in such a way that the seat back frame structure (112) can be inclined relative to the seat cushion frame structure (104), said seat back frame structure (112) includes a pair of side frames (118A,118B) each of which extends in a vertical direction of the vehicle, and an oblique wire (110A,110B) on at least one of said pair of side frames (118A,118B) an upper end of which is fixed to a side portion of said at least one of the pair of side frames (118A,118B) and a lower end of which is fixed to said seat back frame structure (112) at a position forward of a rotational center of said seat back frame structure (112), said oblique wire (11A,110B) includes a characteristics in such a way that, in a case where a load toward a rear side of the vehicle is loaded on said seat back frame structure (112), it has a tension force exert on said seat back frame structure (112) so as to alleviate a moment acting on said seat back frame structure (112) caused by said load, while it does not resist a compressive force from outside thereof. |
