Exercise device providing elliptical exercising paths

Abstract

An exercise device is provided with a reciprocal-movement mechanism and an angle-adjusting chassis comprising a frame, a guider, and a driving assembly. The reciprocal-movement mechanism is operable between at least a first position and a second position, the reciprocal-movement mechanism has a front portion and a rear portion. The angle-adjusting chassis is coupled with the reciprocal-movement mechanism, the angle-adjusting chassis configured to change at least one of a moving path of the reciprocal-movement mechanism, the first position, and the second position.

What is claimed is: 
     
         1 . An exercise device, comprising:
 a reciprocal-movement mechanism operable between at least a first position and a second position, the reciprocal-movement mechanism has a front portion and a rear portion; and   an angle-adjusting chassis coupled with the reciprocal-movement mechanism, the angle-adjusting chassis configured to change at least one of a moving path of the reciprocal-movement mechanism, the first position, and the second position, the angle-adjusting chassis comprising:
 a frame coupled with the front portion of the reciprocal-movement mechanism, the frame having a front portion configured to be supported by a supporting surface and a rear portion; 
 a guider movably coupled with the rear portion of the reciprocal-movement mechanism, the guider having a front portion pivotably coupled with the rear portion of the frame, the guider having a rear portion configured to be supported by the supporting surface; and 
 a driving assembly coupled with the frame for driving a moving piece that causes the rear portion of the frame to rise or fall between a first level and a second level, wherein a movement of the rear portion of the frame causes an incline angle of the guider to vary between a first guider incline angle and a second guider incline angle. 
   
     
     
         2 . The exercise device of  claim 1 , wherein the reciprocal-movement mechanism comprises a flywheel providing a damping effect, a driving wheel for driving the flywheel, two cranks respectively arranged at a side of the driving wheel for driving the driving wheel, two driving arms with each arm comprising two ends in which one end couples with one of the two cranks and the other couples with a wheel disposed on the guider. 
     
     
         3 . The exercise device of  claim 1 , wherein the reciprocal-movement mechanism provides an elliptical or elliptical-like moving path between the first position and the second position and enables an operation by foot movements. 
     
     
         4 . The exercise device of  claim 1 , wherein the frame is pivotably movable relative to the supporting surface based on a pivot point near the front portion of the frame and near the supporting surface. 
     
     
         5 . The exercise device of  claim 1 , wherein the guider comprises two guide rails enabling movements of two first members of the reciprocal-movement mechanism along the guide rails, wherein a rear portion of each of the two first members is slidably coupled with a corresponding guide rail of the two guider rails. 
     
     
         6 . The exercise device of  claim 1 , wherein the supporting surface is ground surface. 
     
     
         7 . The exercise device of  claim 1 , wherein the guider is pivotably movable relative to the supporting surface based on a pivot point near the rear portion of the guider and near the supporting surface. 
     
     
         8 . The exercise device of  claim 1 , wherein at least the front portion of the frame and the rear portion of the guider provide ground support for supporting the exercise device when the exercise device rests on the supporting surface. 
     
     
         9 . The exercise device of  claim 1 , wherein the guider rotates clockwise around a pivot point near the rear portion of the guider to increase the incline angle when the frame rotates counterclockwise around a pivot point near the front portion of the frame, resulting in a first frame incline angle between a bottom of the frame and the supporting surface and the incline angle between the first guider incline angle and the second guider incline angle, with the incline angle being between a bottom of the guider and the supporting surface. 
     
     
         10 . The exercise device of  claim 1 , wherein the driving assembly comprises a motor, a screw rod driven by the motor, an internally-threaded tube rotatably coupled with the screw rod and driven by the motor to move along the screw, and the moving piece coupled with the internally-threaded tube. 
     
     
         11 . The exercise device of  claim 1 , wherein the moving piece is pivotably coupled with the frame and has a first portion slidably supported by the supporting surface and the second portion driven by the motor through the internally-thread tube so that a movement of the internally-threaded tube along the screw causes the first portion to slide on the supporting surface, either forward to increase the incline angle or backward to decrease the incline angle. 
     
     
         12 . The exercise device of  claim 1 , wherein the rear portion of the frame is pivotably attached to and below the front portion of the guider with two parallel pivot points. 
     
     
         13 . The exercise device of  claim 1 , further comprising at least a two pads arranged under and near the front portion of the frame, wherein each of the two pads comprises a surface for contacting the supporting surface and a curved junction corresponding to and coupled with an arced junction of the frame. 
     
     
         14 . An exercise device, comprising:
 a reciprocal-movement mechanism operable between at least a first position and a second position, the reciprocal-movement mechanism has a front portion and a rear portion; and   an angle-adjusting chassis coupled with the reciprocal-movement mechanism, the angle-adjusting chassis configured to change at least one of a moving path of the reciprocal-movement mechanism, the first position, and the second position, the angle-adjusting chassis comprising:
 a frame coupled with the front portion of the reciprocal-movement mechanism, the frame having a front portion configured to be supported by a supporting surface and a rear portion; 
 a guider movably coupled with the rear portion of the reciprocal-movement mechanism, the guider having a front portion pivotably coupled with the rear portion of the frame, the guider having a rear portion configured to be supported by the supporting surface; and 
 a driving assembly coupled with the frame for driving a moving piece that causes the guider rotating clockwise around its rear end and the frame rotating counterclockwise around its front end, resulting in a first frame incline angle between the frame and the supporting surface and a second guider incline angle between the guider and the supporting surface 
   
     
     
         15 . The exercise device of  claim 14 , wherein the reciprocal-movement mechanism comprises a flywheel providing a damping effect, a driving wheel for driving the flywheel, two cranks respectively arranged at a side of the driving wheel for driving the driving wheel, two driving arms with each arm comprising two ends in which one end couples with one of the two cranks and the other couples with a wheel disposed on the guider. 
     
     
         16 . The exercise device of  claim 14 , wherein the reciprocal-movement mechanism provides an elliptical or elliptical-like moving path between the first position and the second position and enables an operation by foot movements. 
     
     
         17 . The exercise device of  claim 14 , wherein the frame is pivotably movable relative to the supporting surface based on a pivot point near the front portion of the frame and near the supporting surface. 
     
     
         18 . The exercise device of  claim 14 , wherein the guider is pivotably movable relative to the supporting surface based on a pivot point near the rear portion of the guider and near the supporting surface. 
     
     
         19 . The exercise device of  claim 14 , wherein at least the front portion of the frame and the rear portion of the guider provide ground support for supporting the exercise device when the exercise device rests on the supporting surface. 
     
     
         20 . The exercise device of  claim 14 , further comprising at least a two pads arranged under and near the front portion of the frame, wherein each of the two pads comprises a surface for contacting the supporting surface and a curved junction corresponding to and coupled with an arced junction of the frame.