Foldable jogging machine

Abstract

A foldable jogging machine comprises a handrail frame, and a machine stand which is formed of a front machine stand and a rear machine stand. The front and the rear machine stands are provided with a spindle. The spindles are driven by a motor via a track. The front and the rear machine stands are mounted pivotally on a swiveling shaft such that they can be folded. The front machine stand is connected with an elevating leg frame for bringing about a reverse moment of force relative to the swiveling shaft, so as to cancel out a forward moment of force which is brought about in relation to the swiveling shaft by the jogging machine and the weight of a user of the jogging machine.

What is claimed is:  
     
         1 . A foldable jogging machine comprising: 
 a handrail frame;    a machine stand fastened with said handrail stand and provided with a front spindle, a rear spindle, and a track connecting said front spindle and said rear spindle;    wherein said machine stand is formed of a front machine stand, a rear machine stand, and a swiveling shaft on which said front machine stand and said rear machine stand swivel, said front machine stand and said rear machine stand being provided with a contact surface, said machine stand further being formed of an elevating leg frame fastened with said front machine stand to bring about a reverse moment of force by a reaction force relative to said swiveling shaft at the time when said machine stand is exerted on by the weight of an exerciser whereby said reverse moment of force cancels out a forward moment of force brought about by the exerciser's weight in relation to said swiveling shaft.    
     
     
         2 . The machine as defined in  claim 1 , wherein said front machine stand and said rear machine stand are mounted pivotally on said swiveling shaft such that said front machine stand and said rear machine stand can be swiveled to be in the same plane.  
     
     
         3 . The machine as defined in  claim 1 , wherein said elevating leg frame is provided with a moving wheel for lifting said machine stand.  
     
     
         4 . The machine as defined in  claim 1 , wherein said front machine stand is provided with a locating hole; wherein said rear machine stand is provided with a fixation mechanism whereby said fixation mechanism is retained in said locating hole to enable said contact surfaces of said front machine stand and said rear machine stand to join together intimately.  
     
     
         5 . The machine as defined in  claim 4 , wherein said fixation mechanism comprises an insertion pin and a spring urging said insertion pin, with said insertion pin being fastened with one end of a steel cable which is put through said spring, said steel cable being fastened at other end with a control knob slidably disposed in a slide slot such that said control knob is slid in said slide slot to actuate said steel cable to extract said insertion pin out of said locating hole, or to retract said insertion pin into said locating hole.