Inexpensive Treadmill with a Concave Platform

Abstract

A treadmill includes a frame, two rollers, a platform and a belt. The rollers are supported on the frame. The platform is supported on the frame and formed with a concave upper face. The belt is wound around the rollers and formed with a lower section and an upper section supported on the concave upper face of the concave platform.

1 . A treadmill including:
 a frame;   two rollers supported on the frame;   a platform supported on the frame and formed with a concave upper face; and   a belt wound around the rollers and formed with a lower section and an upper section supported on the upper face of the concave platform.   
     
     
         2 . The treadmill according to  claim 1 , wherein the platform includes a convex lower face opposite to the concave upper face. 
     
     
         3 . The treadmill according to  claim 2 , wherein the concave upper face of the platform is located at constant distance from the convex lower face of the platform. 
     
     
         4 . The treadmill according to  claim 1 , including a wear-resistant layer provided on the concave upper face of the platform. 
     
     
         5 . The treadmill according to  claim 4 , wherein the wear-resistant layer includes protrusive portions formed on a lower face. 
     
     
         6 . The treadmill according to  claim 5 , wherein the protrusive portions of the wear-resistant layer are bosses. 
     
     
         7 . The treadmill according to  claim 5 , wherein the protrusive portions of the wear-resistant layer are ridges. 
     
     
         8 . The treadmill according to  claim 4 , including a buffering layer provided between the platform and the wear-resistant layer.