referring to the drawings and initially to fig1 - 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 fig4 , 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 fig5 , 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 fig6 , 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 fig1 - 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 .
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 .