Foldable treadmill

Abstract

A foldable treadmill includes a seat, and a two-part tread base having a front carriage pivotally attached to the seat with a pivot axle for allowing the carriage to be rotated relative to the seat, and a rear treadmill frame pivotally secured to the carriage for allowing the treadmill frame to be rotated and folded relative to the carriage, and the carriage is foldable and engageable with the seat for lowering a center of gravity of the treadmill and for preventing the treadmill from falling down when the treadmill frame is rotated and folded relative to the carriage and the seat. A spring biased latch may selectively latch the treadmill frame to the carriage at an upwardly erecting position.

1 . A foldable treadmill comprising: 
 a seat, and    a two-part tread base including a front carriage pivotally attached to said seat with a pivot axle for allowing said carriage to be rotated relative to said seat with said pivot axle, and including a rear treadmill frame pivotally secured to said carriage for allowing said treadmill frame to be rotated and folded relative to said carriage, and    said carriage being foldable and engageable with said seat for lowering a center of gravity of said treadmill and for preventing said treadmill from falling down when said treadmill frame is rotated and folded relative to said carriage and said seat.    
   
   
       2 . The foldable treadmill as claimed in  claim 1  further comprising a spring biased latch for selectively latching said treadmill frame to said carriage and for stably supporting said treadmill frame to said carriage at an upwardly erecting and folding position.  
   
   
       3 . The foldable treadmill as claimed in  claim 2 , wherein said spring biased latch is disposed in said treadmill frame and biased to selectively engage with said carriage.  
   
   
       4 . The foldable treadmill as claimed in  claim 3 , wherein said treadmill frame includes a beam having a hollow space to receive said spring biased latch.  
   
   
       5 . The foldable treadmill as claimed in  claim 4 , wherein said treadmill frame includes a bracket disposed in said beam, said spring biased latch is disposed in said bracket.  
   
   
       6 . The foldable treadmill as claimed in  claim 2 , wherein said treadmill frame includes a hand grip coupled to said spring biased latch for disengaging said spring biased latch from said carriage.  
   
   
       7 . The foldable treadmill as claimed in  claim 1 , wherein said two-part tread base includes at least one supporting device coupled between said treadmill frame and said carriage for supporting said treadmill frame at an upwardly erecting and folding position relative to said carriage.  
   
   
       8 . The foldable treadmill as claimed in  claim 1  further comprising means for rotating said carriage relative to said seat.  
   
   
       9 . The foldable treadmill as claimed in  claim 8 , wherein said rotating means includes a motorized threaded member rotatably disposed in said seat, a follower threaded onto said threaded member and movable and adjustable along said threaded member when said threaded member is rotated relative to said seat, and a stand coupled between said carriage and said follower.  
   
   
       10 . The foldable treadmill as claimed in  claim 9 , wherein said stand includes at least one roller slidably engaged with said seat for guiding said stand to move relative to said seat.  
   
   
       11 . The foldable treadmill as claimed in  claim 10 , wherein said seat includes at least one tube having a bore for slidably receiving said at least one roller of said stand.  
   
   
       12 . The foldable treadmill as claimed in  claim 11 , wherein said seat includes a channel formed in said at least one tube and communicating with said bore of said at least one tube, said stand includes a panel, said at least one roller is pivotally attached to said panel with a pivot pin and said pivot pin is slidably engaged in said channel of said at least one tube.  
   
   
       13 . The foldable treadmill as claimed in  claim 1 , wherein said two-part tread base includes a detecting device for detecting a relative angular position between said carriage and said treadmill frame.  
   
   
       14 . The foldable treadmill as claimed in  claim 13 , wherein said detecting device is attached to said carriage, and an actuating device is attached to said treadmill frame and moved in concert with said treadmill frame, and said actuating device is rotatable relative to said carriage and said detecting device by rotating said treadmill frame relative to said carriage.  
   
   
       15 . The foldable treadmill as claimed in  claim 13 , wherein a threaded member is rotatably disposed in said seat, a follower is threaded onto said threaded member and coupled to said carriage, said follower is movable and adjustable along said threaded member when said threaded member is rotated relative to said seat, and a motor is coupled to said threaded member for rotating said threaded member, and said actuating device is coupled to said motor for actuating said motor.