Track adjusting mechanism for elliptical exerciser

Abstract

An elliptical exerciser includes a frame with a wheel connected thereto and two swinging mechanisms are pivotably connected on two sides of the wheel. Each swinging mechanism includes a swing bar and a connection link. A first end of each connection link is pivotably connected to the wheel and a second end of each connection link is connected to an adjusting mechanism. The adjusting mechanism includes a main body which has a first end pivotably connected to the frame and the two second ends of the connection links are pivotably connected to a second end of the main body. Two pedals are connected to the connection links so that the user holes the swing bars and stands on the pedal to move the pedals along an oval track. The long and short axes of the oval track are adjustable by pivoting the adjusting mechanism.

1 . An elliptical exerciser comprising:
 a frame with a wheel connected thereto and two swinging mechanisms pivotably connected on two sides of the wheel, each swinging mechanism including a swing bar and a connection link, a first end of each connection link pivotably connected to the wheel and a second end of each connection link connected to an adjusting mechanism, the adjusting mechanism including a main body which has a first end pivotably connected to the frame and the two second ends of the connection links pivotably connected to a second end of the main body, a retractable device connected between the adjusting mechanism and the frame.   
     
     
         2 . The elliptical exerciser as claimed in  claim 1 , wherein two first lugs are connected to the frame and the main body is substantially an H-shaped member which includes two lower ends pivotably connected to the two first lugs by two bolts and two upper ends of the main body are bent toward the wheel and are pivotably connected to two respective first holes in two respective first ends of two connection bars by two bolts, two respective second holes are defined in two respective second ends of the two connection bars and the two respective second ends of the connection links are pivotably connected with the second holes by two pins. 
     
     
         3 . The elliptical exerciser as claimed in  claim 1 , wherein two first lugs are connected to the frame and the main body is substantially an H-shaped member which includes a transverse bar on which a second lug is connected thereto, two lower ends of the main body are pivotably connected to the two first lugs by two bolts and two upper ends of the main body are bent toward the wheel and are pivotably connected to two respective first holes in two respective first ends of two connection bars by two bolts, two respective second holes are defined in two respective second ends of the two connection bars and the two respective second ends of the connection links are pivotably connected with the second holes by two pins, the retractable device is a substantially T-shaped device and one end of a rod of the retractable device is connected to the second lug, two rollers are connected to the other end of the rod and movable on two rails on the frame  10 , a pivotable member is connected to a mediate portion of the rod and pivotably connected to a sleeve of the retractable device. 
     
     
         4 . The elliptical exerciser as claimed in  claim 1 , wherein the retractable device includes a motor, a threaded rod and a sleeve, the motor is fixed on the frame and the threaded rod is connected to an output portion of the motor, the sleeve is connected to the threaded rod and pivotably connected to a second lug on the main body, the sleeve moves when the threaded rod is rotated. 
     
     
         5 . The elliptical exerciser as claimed in  claim 3 , wherein the retractable device includes a motor, a threaded rod and a sleeve, the motor is fixed on the frame and the threaded rod is connected to an output portion of the motor, the sleeve is connected to the threaded rod and pivotably connected to a third lug of the rod, the sleeve moves when the threaded rod is rotated. 
     
     
         6 . The elliptical exerciser as claimed in  claim 1 , wherein a control panel is connected on a top of a post on the frame and electrically to the motor.