Folding treadmill

Abstract

A folding treadmill includes a tread base supported by a foot structure which has guide plates formed with elongated slots on two sides of the tread base. The tread base is connected pivotally on the base support through pivot members which are mounted movably within the respective slots so that the tread base is turnable between a folded position and an unfolded position and movable rearward when the tread base turns to the folded position or forward when the tread base turns to the unfolded position. The foot structure further includes a guide rail structure on two sides of the tread base to support movably a first roller which is attached to the tread base and a lifting device for lifting the tread base.

1 . A folding treadmill comprising: 
 a base support including a front end and a rear end;    a guider provided on said base support adjacent said front end and having a slide rail extending substantially in a front-to-rear direction;    a pivot member supported movably and guided by said slide rail;    a tread base including a frame and an endless belt mounted to said frame, said tread base being mounted pivotally to said base support through said slide rail and said pivot member to turn between a folded position and an unfolded position and to move rearward when said tread base turns to said folded position or to move forward when said tread base turns to said unfolded position; and    a first roller attached to said tread base and guided and supported by said base support.    
   
   
       2 . The folding treadmill as claimed in  claim 1 , wherein said base support includes a foot structure and an upright structure extending upward from said foot structure, said guider including left and right guide plates projecting upward from said foot structure at left and right sides of said tread base, said slide rail including left and right elongated slots respectively formed in said left and right guide plates, said left and right elongated slots being connected to said pivot member.  
   
   
       3 . The folding treadmill as claimed in  claim 1 , wherein said foot structure includes left and right guide rails which extend substantially in said front-to-rear direction adjacent to left and right sides of said tread base, respectively, said guide rails being connected to said first roller.  
   
   
       4 . A folding treadmill comprising: 
 a base support including a front end and a rear end;    a guider provided on said base support adjacent to said front end and having a slide rail which extends substantially in a front-to-rear direction and which is inclined downward and rearward;    a tread base including a frame and an endless belt mounted to said frame;    a coupler mounted movably on said base support and connected pivotally to said tread base and said guider so as to enable said tread base to turn relative to said support base between a folded position and an unfolded position, said coupler including a pivot member which is supported movably and guided by said slide rail and which is connected to said tread base so that said tread base is movable rearward and downward when turning to said folded position or moves forward and upward when turning to said unfolded position; and    a first roller attached to said coupler and supported movably on said base support so as to mount movably said coupler on said base support.    
   
   
       5 . The folding treadmill as claimed in  claim 4 , further comprising an inclining device connected to said tread base and said coupler for moving said tread base in an inclined position.  
   
   
       6 . The folding treadmill as claimed in  claim 4 , further comprising a lifting device connected to said tread base and said coupler for moving said tread base to said folded position.  
   
   
       7 . The folding treadmill as claimed in  claim 4 , wherein said guider includes left and right guide plates projecting upward from said base support adjacent left and right sides of said tread base, said slide rail including left and right elongated slots respectively formed in said left and right guide plates, said slots being inclined downward and rearward and receiving said pivot member.  
   
   
       8 . The folding treadmill as claimed in  claim 7 , wherein said coupler includes left and right coupling members each of which has a first end and a second end, said pivot member being attached to said first end, said second end being pivoted to said tread base.  
   
   
       9 . The folding treadmill as claimed in  claim 8 , which comprises a pair of said first rollers, wherein said first rollers being connected respectively to said left and right coupling members.  
   
   
       10 . The folding treadmill as claimed in  claim 9 , wherein each of said left and right coupling members includes a first arm, and a second arm which is connected and angled to said first arm, said first arm having said first end extending away from a juncture of said first and second arms, said second arm having said second end extending away from said juncture.  
   
   
       11 . The folding treadmill as claimed in  claim 10 , wherein each of said coupling members has an extension projecting from said juncture in a direction away from said first and second arms, said extension being connected to a corresponding one of said first rollers.  
   
   
       12 . The folding treadmill as claimed in  claim 11 , wherein each of said coupling members further includes a third arm which has a front end pivoted to said extension coaxially with said first roller and which further has a rear end, and a second roller attached to said rear end of said third arm.  
   
   
       13 . The folding treadmill as claimed in  claim 12 , wherein each of said coupling members further includes a first transverse bar having two opposite ends connected respectively to said extensions of said coupling members, and a second transverse bar having two ends connected respectively to said third arms of said coupling members.  
   
   
       14 . The folding treadmill as claimed in  claim 13 , further comprising a first lifting member for moving said tread base to an inclined position, and left and right second lifting members for moving said tread base to said folded position, said first lifting member being connected between said first transverse bar and said tread base, said second lifting members being connected between said second transverse bar and said tread base.  
   
   
       15 . The folding treadmill as claimed in  claim 12 , wherein said base support includes a foot structure and an upright structure extending upward from said foot structure, said foot structure having a guide rail structure which extend in said front-to-rear direction, said first and second rollers being mounted on said guide rail structure so as to move along said guide rail structure.  
   
   
       16 . A folding treadmill comprising: 
 a base support including a foot structure and an upright structure extending upward from said foot structure, said foot structure having a front end and a rear end;    left and right guide members mounted on said foot structure rearwardly of said upright structure and provided respectively with left and right slots which extend substantially in a front-to-rear direction;    left and right pivot members mounted movably and respectively within said left and right slots for moving substantially along said front-to-rear direction; and    a tread base including a frame and an endless belt mounted to said frame, said tread base being mounted pivotally to said left and right guide members through said pivot members to turn between a folded position and an unfolded position and to move rearward when said tread base turns to said folded position or to move forward when said tread base turns to said unfolded position.    
   
   
       17 . The folding treadmill as claimed in  claim 16 , further comprising a first roller attached to said tread base and mounted movably on said foot structure.  
   
   
       18 . The folding treadmill as claimed in  claim 17 , further comprising a lifting device connected to said first roller so as to be mounted movably on said foot structure and to be connected to said tread base for lifting said tread base to said folded position.  
   
   
       19 . The folding treadmill as claimed in  claim 18 , wherein said foot structure includes a guide rail structure which extends substantially in said front-to-rear direction, said first roller being mounted movably on said guide rail structure so as to move along said guide rail structure.