Patent ID: 8251587

Claim:
A motion guide device for guiding linear or curvilinear motion of a moving body relative to a base, comprising: a raceway rail having a bottom surface, side surfaces and an upper surface and being mounted on one of the base and the moving body; a moving block having a center portion facing the upper surface of the raceway rail and side wall portions facing the side surfaces of the raceway rail and being mounted linearly or curvilinearly movable relative to the raceway rail; and a displacement absorbing mechanism provided on a side surface of the moving block, wherein the moving block has rolling elements adapted to roll within at least one rolling-element rolling part on said raceway rail, said at least one rolling-element rolling part extending parallel to a direction of the linear or curvilinear motion of the moving body, and the displacement absorbing mechanism has a mounting member mounted on an opposite one of the base and the moving body, and a displacement absorbing portion which is fixed to the mounting member and which is shear-deformed when the mounting member is displaced in a direction crossing an upper surface of the moving block due to a load between the moving body and the base through the moving block, the mounting member has a mounting-member side wall portion facing the side surface of the moving block and a mounting-member upper wall portion facing the upper surface of the moving block, and the mounting-member upper wall portion of the mounting member is provided with a mounting hole for mounting the mounting-member onto the opposite one of the base and the moving body.