Abstract:
A multi-mode exercise device includes a main body having two supporting arm assemblies symmetrically mounted on two sides thereof. Each supporting arm assembly has four arms. The four arms of each supporting assembly are pivotally connected with each other via five pivot joints. The main body further has a guiding wheel set, a rotating disc and two connecting rods. Therefore, a user could step on pedals along vertical direction, parallel direction or circular direction selectively.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an exercise bike, and more particularly to an exercise bike which provides multiple track modes. 
     2. Description of Related Art 
     A conventional exercise bike includes a main body having a transmission mechanism mounted in a parallel part thereof, a unidirectional swing arm clutch mounted thereon for controlling a rotation of a wheel, and a damping generator mounted thereon. A four-connection rod mechanism is operated with the transmission mechanism. A spring-restored mechanism is operated with the four-connection rod mechanism. The main body has a handlebar disposed on a vertical part thereof and an operational panel mounted on the vertical part thereof, and a liquid crystal display screen disposed on the panel thereof. The wheel is rotated by a connection of pedals, gears, one-way bearings and connection rods. An idle damping is provided for adjusting a tension of the wheel for providing different users. 
     The conventional exercise bike only provides a single exercise mode. A user feels boring, tired in the single exercise mode after long time using, such that the exercise effect will be decreased. 
     The present invention has arisen to mitigate and/or obviate the disadvantages of the conventional exercise bike. 
     SUMMARY OF THE INVENTION 
     The main objective of the present invention is to provide an improved exercise bike, and more particular to a multi-mode exercise bike. 
     To achieve the objective, the multi-mode exercise bike in accordance with the present invention includes a main body. The main body has two supporting arm assemblies symmetrically mounted on two sides thereof. Each supporting arm assembly comprises a first arm having one end pivotally connected with the main body, a second arm having one end pivotally connected with the main body, a third arm having one end pivotally connected with the other end of the first arm, and a fourth arm having one end pivotally connected with the other end of the third arm and the other end pivotally connected with the other end of the second arm. The first arm has a first jointer located between the main body and the first arm. The second arm has a second jointer located between the main body and the second arm. The second arm and the first arm are arranged in a crisscross manner without directly contacting to each other. The second jointer positioned lower than the first jointer. The third arm has a third jointer located between the third arm and the first arm. The third arm has a pedal mounted thereon. The fourth arm has a fourth jointer located between the third arm and the fourth arm. The fourth jointer is positioned adjacent to the pedal of third arm. A fifth jointer is located between the fourth arm and the second arm. The main body has a guiding wheel set mounted thereon for guiding the second arm swinging as a pivot of the second jointer. The guiding wheel set includes a rotating disc and two connecting rods respectively connected with two sides of the rotating disc. The two connecting rods are respectively connected with the two supporting arm assemblies. Each connecting rod has one end eccentrically pivotally connected with the rotating disc and the other end pivotally connected with a middle section of the second arm located between the second jointer and the fifth jointer. 
     Further, each first arm has a connector extending from the first jointer. The main body has a second guiding wheel set mounted therein for guiding the first arm reciprocatingly swinging as the pivot of the first jointer. The second guiding wheel set includes a second rotating disc and two second connecting rods respectively connected with two sides of the second rotating disc. Each second connecting rod has one end eccentrically pivotally connected with the second rotating disc and the other end pivotally connected with the connector. 
     Further, the main body has two set of damping mechanisms respectively relatively connected with the guiding wheel set and the second guiding wheel set. Each damping mechanism has a idle wheel connected with the rotating disc/second rotating disc and a magnet unit mounted on the idle wheel for controlling a damping force of the idle wheel. 
     Further, the first arm has a handle extending from the first jointer. The handle is pivotable as the pivot of the first jointer. 
     Further, the two pedals of the two third arms are faced to each other. 
     Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a multi-mode exercise bike in accordance with the present invention; 
         FIG. 2  is a perspective view of the multi-mode exercise bike in accordance with the present invention in another direction; 
         FIG. 3  is a side plan view of the multi-mode exercise bike in accordance with the present invention; 
         FIG. 4  is an operational view of the multi-mode exercise bike in accordance with the present invention in a vertical exercise mode; 
         FIG. 5  is an operational view of the multi-mode exercise bike in accordance with the present invention in a parallel exercise mode; and 
         FIG. 6  is an operational view of the multi-mode exercise bike in accordance with the present invention in a circular exercise mode. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to the drawings and initially to  FIGS. 1-6 , a multi-mode exercise bike in accordance with the present invention comprises a main body  1 . The main body  1  has two supporting arm assemblies  2  symmetrically mounted on two sides thereof. Each supporting arm assembly  2  comprises a first arm  21  having one end pivotally connected with the main body  1 , a second arm  22  having one end pivotally connected with the main body  1 , a third arm  23  having one end pivotally connected with the other end of the first arm  21 , and a fourth arm  24  having one end pivotally connected with the other end of the third arm  23  and the other end pivotally connected with the other end of the second arm  22 . 
     The first arm  21  has a first jointer, also called a first pivot joint  31  located between the main body  1  and the first arm  21 . 
     The second arm  22  has a second jointer, also called a second pivot joint  32  located between the main body  1  and the second arm  22 . The second arm  22  and the first arm  21  are arranged in a crisscross manner without directly contacting to each other. The second jointer  32  positioned lower than the first jointer  31 . 
     The third arm  23  has a third jointer, also called a third pivot joint  33  located between the third arm  23  and the first arm  21 . The third arm  23  has a pedal  231  mounted thereon. 
     The fourth arm  24  has a fourth jointer, also called a fourth pivot joint  34  located between the third arm  23  and the fourth arm  24 . The fourth jointer  34  is positioned adjacent to the pedal  231  of third arm  23 . A fifth jointer, also called a fifth pivot joint  35  is located between the fourth arm  24  and the second arm  22 . 
     The main body  1  has a guiding wheel set  11  mounted thereon for guiding the second arm  22  swinging as a pivot of the second jointer  32 . The guiding wheel set  11  includes a rotating disc  111  and two connecting rods  112  respectively connected with two sides of the rotating disc  111 . The two connecting rods  112  are respectively connected with the two supporting arm assemblies  2 . Each connecting rod  112  has one end eccentrically pivotally connected with the rotating disc  111  and the other end pivotally connected with a middle section of the second arm  22  located between the second jointer  32  and the fifth jointer  35 . 
     Referring to  FIG. 4 , when a user alternatively steps on the pedals  231  along a vertical direction, the guiding wheel set  11  guides the second arm  22  reciprocatingly swinging up and down as the pivot of the second jointer  32 . The fourth arm  24  pivotally pulls the third arm  23  such that the third arm  23  is swung up and down as the pivot of the third jointer  33 . 
     Referring to  FIG. 5 , when the user alternatively steps on the pedals  231  along a parallel direction, the third arm  23  is suspended on the first arm  21  and the fourth arm  24  such that the third arm  23  is swung along the parallel direction as the pivots of the first jointer  31  and the fifth jointer  35 . 
     Referring  FIG. 6 , when the user alternatively steps on the pedals  231  along a circular direction, the guiding wheel set  11  guides the second arm  22  reciprocatingly swinging up and down as the pivot of the second jointer  32  such that the third arm  23  is able to be swung up and down. The third arm  23  is also suspensibly swung along the parallel direction as the pivots of the first jointer  31  and the fifth jointer  35  such that the fifth jointer  35  and the third jointer  33  are moved to-and-fro relative to each other to form a circular track of the pedal  231 . 
     Further description as the following, each first arm  21  has a connector  211  extending from the first jointer  31 . The main body  1  has a second guiding wheel set  12  mounted therein for guiding the first arm  21  reciprocatingly swinging as the pivot of the first jointer  31 . The second guiding wheel set  12  includes a second rotating disc  12  and two second connecting rods  122  respectively connected with two sides of the second rotating disc  121 . Each second connecting rod  122  has one end eccentrically pivotally connected with the second rotating disc  121  and the other end pivotally connected with the connector  211 . 
     Referring to  FIGS. 1-2 , the rotating disc  111  and the second rotating disc  121  respectively have a extender A and a extender B radially extending therefrom. Each of the extender A and the extender B is pivotally connected with connecting rod  112  and the second connecting rod  122 . The extenders A and B are increased a width of the rotating disc  111  and a width of the second rotating disc  121 . 
     Further, the main body  1  has two set of damping mechanisms  13  respectively relatively connected with the guiding wheel set  11  and the second guiding wheel set  12 . Each damping mechanism  13  has a idle wheel  131  connected with the rotating disc  111 /second rotating disc  121  and a magnet unit  132  mounted on the idle wheel  131  for controlling a damping force of the idle wheel  131 . 
     Further, the first arm  21  has a handle  212  extending from the first jointer  31 . The handle  212  is pivotable as the pivot of the first jointer  31 . 
     Further, the two pedals  231  of the two third arms  23  are faced to each other. 
     The multi-mode exercise bike in accordance with the present invention is depended on the user&#39;s force for providing a vertical directional mode, a parallel directional mode, and a circular directional mode. The three modes are related to human foot. The user can change various exercise modes to prevent from a long time single exercise mode bringing unexciting and tired felling. 
     Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.