Abstract:
An exercise machine includes a base on which a swiveling frame is pivotally mounted. The swiveling frame is provided at one end with a seat, and at another end with a leg-supporting frame pivoted therewith by a position controlling seat. The base is further provided with a backrest frame pivoted therewith by an adjustment seat. The leg-supporting frame and the backrest frame can be adjusted to be positioned at a specific angular position so as to provide a user of the exercise machine with the damping force of a desired magnitude.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an exercise machine which is designed for use in training various parts of the body of an exerciser. 
     2. Description of Related Art 
     The conventional exercise device is generally designed to train a specific part of the body of an exerciser and is therefore not suitable for use in training various parts of the exerciser&#39;s body. In addition, the conventional exercise device is generally not provided with a device for adjusting the magnitude of the damping force. Even if the conventional exercise device is provided with such a device, the device is complicated in construction and is not cost-effective. 
     BRIEF SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide an exercise machine which is versatile and cost-effective. 
     The exercise machine of the present invention comprises a base on which a swiveling frame is pivotally mounted. The swiveling frame is provided at one end with a seat, and at the other end with a leg-supporting frame. The base is further provided with a backrest opposite in location to the leg-supporting frame. The backrest is provided with two handles pivoted therewith. The backrest and the leg-supporting frame can be adjusted to be positioned at a specific angular position so as to provide an exerciser with the damping force of a desired magnitude. 
    
    
     The features and the advantages of the exercise machine of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings. 
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
     FIG. 1 shows a perspective view of the preferred embodiment of the present invention. 
     FIG. 2 shows an exploded view of the preferred embodiment of the present invention. 
     FIG. 3 shows a side plan view of the preferred embodiment of the present invention. 
     FIG. 4 shows a schematic view of the preferred embodiment of the present invention in a first form of operation. 
     FIG. 5 shows a top plan view of the swiveling frame of the preferred embodiment of the present invention in action. 
     FIG. 5A shows another top plan view of the swiveling frame of the preferred embodiment of the present invention in action. 
     FIG. 6 shows a schematic view of the preferred embodiment of the present invention in a second form of operation. 
     FIG. 7 shows a schematic view of the preferred embodiment of the present invention in a third form of operation. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     As shown in FIGS. 1-3, an exercise machine embodied in the present invention comprises the component parts which are described hereinafter. 
     A base  10  is formed of a first bottom frame  11 , a second bottom frame  12 , and a base rod  13  mounted on the bottom frames  11  and  12 . The base rod  13  is provided with a shaft tube  14  and an adjustment seat  30 . 
     A swiveling frame  20  is formed of an arresting rod  21  and a seat-supporting plate  23  on which a seat pad  22  is disposed. The underside of the seat-supporting plate  23  is pivoted with the shaft tube  14  of the base  10 . The swiveling frame  20  is further formed of a position controlling seat  40  which is opposite in location to the seat-supporting plate  23  and the adjustment seat  30 . 
     A leg-supporting frame  50  is fastened at the bottom end to the position-controlling seat  40  and is provided at the top end with a cross rod  51 , and two pedals  52  and  53  which are pivotally mounted on two opposite ends of the cross rod  51 . 
     A backrest frame  60  is provided with a backrest pad  61  and is fastened at the bottom end with the adjustment seat  30 . The backrest frame  60  is further provided at the top end with a cross shaft tube  62 . 
     Two handle frames  70  are identical in construction to each other and are formed of a rest pad  71  and a grip  72 . The rest pad  71  is provided at two ends thereof with connection tubes  711  and  712 , with each being provided in the interior thereof with a retaining piece  80  to facilitate the pivoting of the first connection tube  711  with two ends of the cross shaft tube  62  of the backrest frame  60 . 
     The second connection tube  712  of the rest pad  71  is pivoted with one end of the grip  72  in conjunction with the retaining piece  80 . 
     The present invention is characterized by the adjustment seat  30  and the position controlling seat  40 . 
     The adjustment seat  30  has a fitting portion  31 , which is fitted over one end of the base rod  13  of the base  10  in conjunction with a locating button  32  for locating the fitting portion  31  on the base rod  13 . The fitting portion  31  is provided with a first upright plate  33  and a second upright plate  34 , which are respectively provided with a pivoting hole  331 ,  341 , and a plurality of fastening holes  332 ,  342 . The backrest frame  60  and the base rod  13  of the base  10  are pivoted together by a pivot  35  which is put through the pivoting hole  331  of the first upright plate  33 , the pivoting hole  341  of the second upright plate  34 , and a first connection hole  601  of the bottom end of the backrest frame  60 . A fastening bolt  36  is put through one of the fastening holes  332  of the first upright plate  33 , one of the fastening holes  342  of the second upright plate  34 , and a second connection hole  602  of the bottom end of the backrest frame  60 . As a result, the backrest frame  60  is fastened fixedly with the base rod  13  of the base  10 . 
     The position controlling seat  40  is provided with a first side plate  41  and a second side plate  42 , which are opposite in location to each other. The first side plate.  41  is provided with a first pivoting hole  411  and a plurality of fastening holes  412 . The second side plate  42  is provided with a second pivoting hole  421  and a plurality of fastening hole  422 . The bottom end of the leg-supporting frame  50  is pivoted with the arresting rod  21  of the swiveling frame  20  by a pivot  43  which is received in the pivoting holes  411  and  421  of the two side plates  41  and  42 , as well as a first through hole  501  of the bottom end of the leg-supporting frame  50 . The leg-supporting frame  50  and the arresting rod  21  of the swiveling frame  20  are fastened fixedly by a fastening bolt  44  which is received in one of the fastening holes  412  of the first side plate  41 , one of the fastening holes  422  of the second side plate  42 , and a second through hole  502  of the bottom end of the leg-supporting frame  50 . 
     As illustrated in FIG. 4, an exerciser is seated on the seat pad  22  such that both hands of the exerciser hold the grips  72 , and that the back of the exerciser is rested against the backrest  61 , and further that both feet of the exerciser are rested against the pedals  52  and  53 . As illustrated in FIGS. 5 and 5A, when the two pedals  52  and  53  are moved leftwards and rightwards in a reciprocating manner, the swiveling frame  20  is caused to swivel leftwards and rightwards in the reciprocating manner. As a result, the exercise effect is brought about on the belly, the legs, the waist, and the hips of the exerciser. 
     As illustrated in FIG. 6 in conjunction with FIGS. 4,  5 , and  5 A, the leg-supporting frame  50  can be angularly relocated by inserting the fastening bolt  44  into other fastening holes  412  and  422  of the position controlling seat  40 , thereby enabling both legs of the exerciser to extend. As a result, both legs of the exerciser must exert a greater force on the pedals  52  and  53  so as to cause the two pedals  52  and  53  to move leftward and rightward in the reciprocating manner. In other words, a greater damping force is thus provided by the exercise machine of the present invention by adjusting the angular position of the leg-supporting frame  50 . 
     As illustrated in FIG. 7, the backrest frame  60  is reclined by inserting the fastening bolt  36  into other fastening holes  332  and  342  of the adjustment seat  30 . The belly muscles of an exerciser are trained when the upper portion of the body of the exerciser moves away from and towards the reclined backrest frame  60  in a reciprocating manner. 
     The embodiment of the present invention described above is to be regarded in all respects as being merely illustrative and not restrictive. Accordingly, the present invention may be embodied in other specific forms without deviating from the spirit thereof. The present invention is therefore to be limited only by the scope of the following claim.