| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a collision detection device for a vehicle in which a chamber member is certainly fixed to a vehicle body, damage to a mounting part caused by a large temperature variation in a hood of the vehicle is prevented, and the determination of a collision can be performed by detecting a pressure variation in the chamber member at the collision of the vehicle. Ž<P>SOLUTION: In the vehicle bumper 10, the chamber member 20 is provided with: a chamber member body 21 in which a chamber space 21a is formed therein; and a plurality of mounting parts 22, 24 for fixing the chamber member body 21 to the vehicle body having linear expansion coefficients different from linear expansion coefficients of the chamber member body 21. Furthermore, the chamber member body 21 is provided with a first expansion/contraction part 23 formed between the predetermined adjacent mounting parts 22, 24 of the plurality of mounting parts 22, 24, and expandable and contractible in a direction for connecting the predetermined mounting parts 22, 24. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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