Miniaturized track exercising device

Abstract

A miniaturized track exercising device includes a chassis on which a counterweight wheel set is provided. The counterweight wheel set is provided with a resistance adjusting unit. Two crank arms extend in opposite directions and are arranged on opposite sides of the counterweight wheel set. Each crank arm is pivotally connected to a pedal in an offset manner. The pedals are provided with a guide rail unit that is opposite to the crank arms with respect to the pedals and that provides a pivot joint and a fulcrum. Thus, when the pedals are being treaded, with the counterweight wheel set inducing a sufficient resistance that is adjusted with the resistance adjusting unit and the guide rail unit providing support against gravitational force acting on the pedals while the pedals undergo track motion, the pedals are constrained by the guide rail unit to generate an elliptical track motion.

1 . A miniaturized track exercising device comprising a chassis on which a counterweight wheel set is provided, the counterweight wheel set being provided with a resistance adjusting unit, two crank arms extending in opposite directions and arranged on opposite sides of the counterweight wheel set, each crank arm being pivotally connected to a pedal in an offset manner, the pedals being provided with a guide rail unit that is opposite to the crank arms with respect to the pedals and that provides a pivot joint and a fulcrum, whereby when the pedals are being treaded, with the counterweight wheel set inducing a sufficient resistance that is adjusted with the resistance adjusting unit and the guide rail unit providing support against gravitational force acting on the pedals while the pedals undergo track motion, the pedals are constrained by the guide rail unit to generate an elliptical track motion. 
   
   
       2 . The miniaturized track exercising device as claimed in  claim 1 , wherein the guide rail unit comprises a rail bar having a semi-circular cross-section and extending in a frontward direction from an underside of each pedal, two fulcrum rollers being rotatably mounted to a front portion of the chassis and respectively engaging in a rolling manner with and supporting the respective rail bar. 
   
   
       3 . The miniaturized track exercising device as claimed in  claim 1 , wherein the guide rail unit comprises a rail bar extending in a frontward direction from an underside of each pedal and having a front end to which a fulcrum roller is rotatably mounted for and adapted to roll on a fixture surface, whereby being supported on the ground and with the fulcrums as pivot joints, the pedals are constrained by the crank arms and the rail bars to undergo elliptical motion. 
   
   
       4 . The miniaturized truck exercising device as claimed in  claim 3 , wherein the guide rail unit comprises channels having upward facing openings and arranged at a front end and opposite sides of the chassis to movably receive the fulcrum rollers therein respectively for making rolling of the fulcrum rollers smooth, the channels being foldable inward to reduce space occupied thereby. 
   
   
       5 . The miniaturized track exercising device as claimed in  claim 1 , wherein the guide rail unit comprises a guide collar mounted to an underside of each pedal and a rail bar slidably extending in a frontward direction through the collar, a front end of the rail bar being pivoted to a front end of the chassis whereby the pedals are constrained by the crank arms and are movable along the guide rail unit to thereby induce an elliptic motion.