Patent ID: 7931318
Filing Date: 2011-04-26
Classification: B60R

Abstract:
1. A bumper attachment portion structure that is applied to a vehicle body structure, comprising a bumper reinforcement, a pair of right and left side members, and attachment releasing parts, wherein: the bumper reinforcement is disposed on an end portion side in a front-rear direction of a vehicle, extends substantially along a vehicle width direction while convexly curving frontward or rearward in the vehicle front-rear direction, and receives an impact load during an impact; the pair of right and left side members extend substantially parallel to each other along the vehicle front-rear direction and have attached thereto, directly or via other members, both longitudinal direction end portion sides of the bumper reinforcement; and each of the attachment releasing parts is disposed at a bumper attachment portion where the bumper reinforcement and the side member are connected to each other, and when a load that is equal to or greater than a predetermined value is inputted to the bumper attachment portion during an impact, the attachment releasing part releases the state of attachment at a vehicle width direction inside part of the bumper attachment portion to thereby cause a point of origin of bending in the bumper attachment portion to be positioned in a vehicle width direction outside part of the bumper attachment portion and the attachment releasing part maintains release of the attachment at the vehicle width direction inside part of the bumper attachment portion.