Patent ID: 6905443

Claim:
A treadmill comprising a base seat, a tread platform and a gradient adjusting device wherein: two sides of the base seat respectively have two upward extending columns, a front end of the tread platform being mounted between the two columns of the base seat, a tread belt being disposed on the tread platform, a bottom of said front end of the tread platform having at least one stop block; and the gradient adjusting device has two symmetrical adjusting members and an telescopic rod, each adjusting member having a first and a second ends containing a certain angle and outward extending, a center of each of the adjusting member is pivotally connected with an inner face of column one or the other of said near bottom end thereof, the first ends of the adjusting members being respectively pivotally connected with two sides of the front end of the tread platform, a transverse beam being fixed between the second ends of the adjusting members and positioned under the bottom of the front end of the tread platform, whereby the stop block of the tread platform can abut against the transverse beam, the adjusting members being driven by the telescopic rod to swing.