Mult-functional exercise device

Abstract

A multi-functional exercise device is disclosed. The multi-functional exercise device has a base. A front section of the base is pivotally installed with a tread rod with an adjustable orientation, and a rearward extending supporting frame for being installed with a cushion. A rear section of the base is installed with a stand frame. A top end of the stand frame is pivotally installed with a rotary seat. The rotary seat serves to be arranged with the sliding track so that the back pad can straightly move. When the legs of the user tread upon the tread rod and seats on the cushion, by the force for straightening the leg, the back will move the back pad to move straightly, or the back pad pivotally rotates with the rotary seat, or the back pad moves and pivotally rotates to swing so that the legs, waist and abdomen moves at the same time.

What is claimed is:  
     
         1 . A multi-functional exercise device comprising: 
 a base having a front section and a rear section, the front section being pivotally installed with a tread rod with an adjustable orientation, a front section of the base being installed with a supporting frame; the supporting frame extending backwards for being installed with a cushion;    a stand frame installed at the rear section of the base; an end for combining the stand frame and the base being defined as a bottom end; an end of the stand frame with respect to the bottom end being defined as a top end; a section between the top end and the bottom end being defined as a middle section; a supporting frame being installed between the middle section and the base; a top end of the stand frame being pivotal installed with    a rotary seat; and    a back pad being arranged with a sliding track in parallel; the sliding track passing through the roller, through the back pad sliding straightly with respect to the rotary seat; at least one elastic element being installed between the back pad and the stand frame; when the back pad moves, a resisting force generates.    
     
     
         2 . The multi-functional exercise device as claimed in  claim 1 , wherein a front section of the base has a pivotal seat; the pivotal seat is pivotally installed with a tread rod; the tread rod is installed with a positioning pin near the pivotal place; the pivotal seat has a plurality of positioning holes near the positioning pin; and the positioning pin passes through the hole to buckle the tread rod.  
     
     
         3 . The multi-functional exercise device as claimed in  claim 2 , wherein at least one elastic elements are installed between the tread rod and the supporting frame, when the positioning pin is not buckled at any positioning hole, the elastic element pushes the tread rod to swing and the elastic element generates a resisting force.  
     
     
         4 . The multi-functional exercise device as claimed in  claim 1 , wherein a side of the rotary seat near the stand frame is pivotally installed with two first rolling wheel sets; a side of the rotary seat far away from the stand frame is pivotally installed with a roller; the sliding track passes through the two first rolling wheel sets and the roller so that the sliding track moves straightly.  
     
     
         5 . The multi-functional exercise device as claimed in  claim 1 , wherein the sliding track of back pad is installed with two stoppers, thereby, as the sliding track slides linearly with respect to the rotary seat; the two stoppers resists against the roller of the rotary seat for forming a confinement of the sliding track.