Foldable elliptical fitness machine

Abstract

A foldable elliptical fitness machine comprises a first frame securely supported on a floor and a second frame for installing an elliptical structure, and the second frame is pivotally coupled to the first frame by a pivoting device, such that the second frame can be rotated with respect to the first frame, wherein the elliptical structure comprises a rotating member having two eccentric pivotal points, and two pedal arms. A central penetrating axle of the rotating member is pivotally coupled onto the second frame, and each eccentric pivotal point is pivotally coupled to the first end of the pedal arm, and each pedal arm includes a footrest for a user to step. If the first end of the pedal arm rotates with the crank, the footrest will move in an elliptic path. With the foregoing structural design, the elliptical structure can be fully folded to improve the convenience of use.

1 . A foldable elliptical fitness machine, comprising a first frame and a second frame, wherein the first frame securely supported on a floor and the second frame installed an elliptical structure, and the second frame being pivotally coupled to the first frame by a pivoting device, such that the second frame and the elliptical structure can be rotated and folded upright with respect to the first frame, and the first frame supports the second frame, and the elliptical structure comprises a rotating member having two eccentric pivotal points, and two pedal arms, and the middle of the rotating member is pivotally coupled with the second frame, and the two pivotal points of the rotating member are separately and pivotally coupled to a first end of a corresponding pedal arm, and the each pedal arm includes a footrest capable of moving in an elliptic path.  
     
     
         2 . The elliptical fitness machine as claimed in  claim 1 , wherein the rotating member is coaxially coupled to two cranks to define a rigid body and the axle is pivotally coupled to the second frame.  
     
     
         3 . The elliptical fitness machine as claimed in  claim 1 , wherein the pivoting device is passed through the second frame and the first frame by a pivotal axle, such that the second frame can be rotated to an angle with respect to the first frame.  
     
     
         4 . The elliptical fitness machine as claimed in  claim 1 , wherein the pivoting device is passed through the second frame and the first frame by a pivotal axle, such that the second frame can be rotated to an angle with respect to the first frame, and a enabling assembly includes a support rod and an actuating device, the support rod pivotally coupled to the rear end of the second frame, and the actuating device is coupled between the support rod and the second frame, and the actuating device includes a body and a contractible rod, and the contractible rod can be contracted with respect to the body to swing the support rod to an angle.  
     
     
         5 . The elliptical fitness machine as claimed in  claim 1 , wherein the pivoting device is pivotally coupled to a link rod and a swinging rod at the same pivotal point at the front end of the second frame, and another end of the link rod is pivotally coupled to the first frame, and the swinging rod includes a roller pivotally coupled to a free end of the swinging rod, and the first frame has a track thereon, and the roller of the swinging rod is in contact with the track, and a enabling assembly connected between the swinging rod and the first frame, the enabling assembly includes an actuating device connected between the first frame and the swinging rod, and the actuating device includes a body and a contractible rod, and the contractible rod can be contracted with respect to the body to swing the swinging rod to an angle.  
     
     
         6 . The elliptical fitness machine as claimed in  claim 1 , wherein the pivoting device comprises: 
 two side panels, disposed at the first frame, the each side panel includes a first pivotal connecting portion and a second pivotal connecting portion; 
 two side rods, disposed at the second frame, and the each side rod includes a pivotal connecting portion disposed proximate to an end of the second frame; two first link rods, each having a first pivotal connecting portion, a second pivotal connecting portion, and a third pivotal connecting portion, and the third pivotal connecting portion on the each first link rod and the pivotal connecting portion corresponding to the rod on the second frame are passed by a pivotal axle for defining a pivotal connection;  
   two second link rod, and a first end of the each second link rod having a pivotal axle and being pivotally coupled to a first pivotal connecting portion corresponding to the side panel of the first frame, and the second end includes a pivotal axle pivotally coupled to a corresponding first pivotal connecting portion of the first link rod; and    two third link rods, and a first end of the each third link rod includes a pivotal axle pivotally coupled to a second pivotal connecting portion corresponding to the side panel of the first frame, and a second end includes a pivotal axle pivotally coupled to the second pivotal connecting portion corresponding to the first link rod; and    an enabling assembly comprises: 
 a fixed rod, fixed to the two first link rods, and a lateral side of the fixed rod is extended to a connecting rod; and  
 an actuating device, including a motor and a moving element driven by the motor to move and contract, and the moving element is pivotally coupled to the connecting rod of the fixed rod;  
   each set of the first link rod, the second link rod, the third link rod, and the side panel constitutes a structure of four link mechanism, such that when the actuating device drives the moving element, the structure of four link mechanism will move to drive an end of the second frame to ascend to change the inclination of the second frame.    
     
     
         7 . The elliptical fitness machine as claimed in  claim 6 , wherein the second link rod and the third link rod are rotated in opposite directions with respect to the first frame.  
     
     
         8 . The elliptical fitness machine as claimed in  claim 6 , wherein the actuating device has an output end being a rotate rod, and the rotate rod is screwed with the moving element, such that when the rotate rod is rotated, the moving element can move on the rotate rod.  
     
     
         9 . The elliptical fitness machine as claimed in  claim 6 , further comprising an actuating device coupled between the first frame and the second frame for providing a subsidiary force to rotate and fold the second frame upright with respect to the first frame.  
     
     
         10 . The elliptical fitness machine as claimed in  claim 1 , wherein the second frame includes two sliding tracks, and a second end of the two pedal arms separately have a roller, and a second end of the each pedal arm is embedded into the sliding track, such that the roller can roll on the corresponding sliding track.  
     
     
         11 . The elliptical fitness machine as claimed in  claim 10 , wherein the sliding track includes a recessive guide groove disposed separately on both sides of the sliding track, and a second end of the pedal arm is pivotally coupled to a wheel base, and the wheel base includes a plate extended down separately from both sides of the wheel base, and the internal surface of the each plate is pivotally coupled to two of the rollers, and the roller of the each plate is embedded in the corresponding guide groove.  
     
     
         12 . The elliptical fitness machine as claimed in  claim 1 , wherein the first frame includes a pillar extended downward separately from both sides of the first frame, and the each pillar includes a handgrip.  
     
     
         13 . The elliptical fitness machine as claimed in  claim 1 , wherein the first frame includes a pillar extended upward separately from both sides of the first frame, and the each pillar is pivotally coupled to a shaking rod extended vertically up and down, and the each pedal arm on the second frame is pivotally coupled to a first end of a link rod, and a second end of the each link rod is coupled to the bottom of a corresponding shaking rod, and the each shaking rod includes a handle at the top of the shaking rod.  
     
     
         14 . The elliptical fitness machine as claimed in  claim 13 , wherein the each shaking rod includes a C-shape cross section disposed at its lower half and a first guide groove extended axially along the shaking rod, and the second frame includes a guide track disposed separately on the two link rods, and the each guide track includes a C-shape cross section at a lateral side of the guide track and a second guide groove extended axially along the guide track, and the each link rod includes a first roller and a second roller disposed separately on the distal ends of the link rod, and the first roller is embedded and limited in the corresponding first guide groove and rolled in the first guide groove, and the second roller is embedded and limited in the corresponding second guide groove and rolled in the second guide groove.  
     
     
         15 . The elliptical fitness machine as claimed in  claim 1 , wherein the first frame further comprising a sliding track, and the axial line of the sliding track is extended along the direction of the front and rear ends of the first frame, and the sliding track is sheathed onto the sliding rod, such that the sliding rod can move with respect to the sliding track for a contraction, and the sliding rod includes a second pivotal connecting portion, and the second pivotal connecting portion is pivotally coupled to a first end of a link rod, and the link rod second end is pivotally coupled to the second frame, and the sliding rod includes a latch pivotally coupled thereon, and a first end of the latch includes a hook portion, and a spring is installed between a second end of the latch and the sliding rod, and the first frame includes a hooked portion corresponding to the hook portion of the latch, such that when the second frame is rotated and folded upright with respect to the first frame, the sliding rod is contracted with respect to the sliding track, and the hook portion of the latch is hooked and fixed by the hooked portion of the first frame for fixing the second frame with the corresponding first frame.  
     
     
         16 . The elliptical fitness machine as claimed in  claim 1 , wherein the second frame further comprises a flywheel, and the flywheel and the rotating member are coaxially and pivotally coupled to the second frame, and the flywheel includes a magnetic resisting device, such that when the flywheel is rotated to cut off a magnetic line of a magnet on the magnetic resisting device, the flywheel produces a magnetic resistance.  
     
     
         17 . The elliptical fitness machine as claimed in  claim 1 , wherein the first frame having a bottom supported on a floor constitutes a supporting plane, such that when the second frame and the elliptical structure are folded fully upright with respect to the first frame, the center of gravity of a structure comprised of the second frame and the elliptical structure falls within the range of the supporting plane.