Oval orbit exercise bike

Abstract

An oval orbit exercise bike comprises a flywheel locked to an upright post of a front portion of a base frame by an axle through central bore. On both sides of the base frame, there are two sets of exercise devices, each of which comprises a pedal, handlebar and linkage mechanism composed of the first and second link active link rods, fixed link rod and crankshaft. When the pedal is pushed downward, force applied reacts on the first and second active link rods, causing the flywheel to rotate around the central bore. Simultaneously, the crankshaft and fixed link rod pivoted on the first active link rod cause the handlebar to produce back and forth swings. The pedal, with the first and second active link rods pivoted on it, makes movement around an oval orbit, causing the handlebar to swing, thus providing human body with relaxation and comfort.

1 . An oval orbit exercise bike, at least comprising a base frame, a flywheel and an exercise device characterized by: 
 said base frame having a rear portion as a fixing point and a front portion being an upright post with an indicator mounted on its tip and a lower part of said upright post locked in a lateral axle;    said flywheel having a central bore for linking to one side of said post;    said exercise devices, disposed on both sides of said base frame, each consisting of a pedal, handlebars and linkage mechanism, each linkage mechanism constituting a first active rod, a second active rod, a link rod and a crankshaft, pin employed to link said pedal to said first active rod and said second active rod, said link rod having one end linking a top end of said second active rod and said crankshaft and locking them to said central bore of said flywheel and other end linking to said first active rod pivoted on a lateral axle together with said handlebar;    while said pedal being pushed downward, force applied reacting on both said first active rod and said second active rod, causing said flywheel to rotate along said central bore, simultaneously said link rod of said crankshaft pivoting on said first active rod, said handlebars receiving force to swing back and forth, in the meantime, said first active rod and said second active rod both pivoted on said pedal, so said pedal obliged to make an oval movement.    
     
     
         2 . The oval orbit exercise bike of  claim 1 , wherein said first active rod and said second active rod of said linkage mechanism provide a plurality of lock holes for adjusting the angle formed between said handlebar and said first active rod to obtain a proper pace range of said pedal.  
     
     
         3 . The oval orbit exercise bike of  claim 1 , wherein said second active rod can be designed to be fastened at variable position along the longitudinal direction of said flywheel for adjusting a proper pace range of said pedal.