| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vehicular bumper unit capable of restraining dispersion of material strength and deterioration of flexural rigidity in a bumper reinforcement. Ž<P>SOLUTION: The bumper reinforcement 12 is made of a steel plate extended in the vehicle's width direction, while both the end edges 12a thereof are connected to a pair of crash boxes 11 extended in a longitudinal direction of a vehicle. The bumper reinforcement 12 includes a hardened area A1 which is shaped and simultaneously hardened under a state of being heated via direct application of electric current at an intermediate part 12b in the direction of the width of the vehicle. Both the end edges 12a sandwiching the hardened area A1 include non-hardened areas A2 respectively, whereas the hardened area A1 constitutes a rectangular form when spread on a plane surface in a developed state. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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