Patent ID: 7828699

Claim:
A base for a treadmill comprising: a bottom board having two sides; two side frames attached respectively to the sides of the bottom board and each side frame having a top; and two stepping frames connected respectively to the side frames and each stepping frame comprising an anti-slipping frame having a bottom mounted securely on the top of a corresponding side frame, a top opposite to the bottom, a side between the top and the bottom of the anti-slipping frame and opposite to the bottom board and an anti-slipping member mounted on the top of the anti-slipping frame; and a side wing connected to the side of the anti-slipping frame and extending laterally toward a side opposite to the bottom board to increase areas of the stepping frames for users to step, wherein the anti-slipping member on the anti-slipping frame of each stepping frame comprises multiple anti-slipping ribs formed on the top of the anti-slipping frame; each side frame has multiple through holes; the anti-slipping frame of each stepping frame has multiple threaded holes defined in the bottom of the anti-slipping frame and aligning respectively with the through holes in the corresponding side frame; multiple bolts mounted respectively through the through holes in the side frames and screwed respectively into the threaded holes in the anti-slipping frames; the side wing of each stepping frame abuts with the anti-slipping frame of the stepping frame and is connected securely to the corresponding side frame; each side frame has multiple holding elements mounted on a side of the side frame opposite to the bottom board; and the side wing of each stepping frame has multiple engaging elements respectively engaging the holding elements on the corresponding side frame.