Patent Publication Number: US-2004043871-A1

Title: Treading exercising machine with adjustable elliptical track for tilting at two sides

Description:
FIELD OF THE INVENTION  
       [0001] The present invention relates to exercising training machine, and particularly to a treading exercising machine with adjustable elliptical track for tilting at two sides  
       BACKGROUND OF THE INVENTION  
       [0002] A prior art, U.S. Pat. No. 6,146,313 disclosed a cross training exercise device. In that, an exercise device to simulate various types of stepping motions is disclosed. The device comprises a frame having a pivot axis defined thereon, the frame configured to be supported on a floor; a first and second foot link. Each foot link including a first end and a second end; a foot support for receiving the user&#39;s feet. The foot support is supported by the first and second foot links, and the foot support having a heel supporting section and toe supporting section. A coupling system is associated with the first end of each foot link for coupling the first end of each foot link to the pivot axis so that the first end of each foot link travels in a closed path relative to the pivot axis. A guide associated with the frame and operative to engage and direct the second ends of the foot links along preselected reciprocating paths of travel as the first ends of the respective foot links travel along their paths of travel, so that when the exercise device is in use and when the second end of one of the foot links travels forwardly from a rearmost position, the heel supporting section of the foot support rising relative to the toe supporting section of the foot support so that the heel portion of the user&#39;s foot initially rises at a faster rate than a toe portion thereof and when the second end of the foot link travels rearwardly from a foremost position, the heel supporting section of the foot support lowering relative to the toe supporting, section of the foot support so that the heel portion of the user&#39;s foot initially lowers at a faster rate than the toe portion. An elevation system serves for selectively and automatically changing at least one of the elevation and angular orientation of the guide relative to the frame so as to alter the path traveled by the second ends of the first and second links, and to alter the nominal relative orientation of the heel supporting section of the foot support relative to the toe supporting section of the foot support.  
       [0003] However, in this prior art, the traveling paths of the foot supports can not be changed greatly. Even the guide is adjusted to a largest tilt angle and a smallest tilt angle. However, a line by connecting the respective highest supporting point with the respective lowest supporting point is only slightly shifted from the original line with an angle of 10 to 45 degrees. Thereby, the elliptical paths by changing the foot supports only changes slightly. The paths simulated are only finite. Only a flat path or a slightly upward path can be simulated. Thereby, the prior art design has only finite functions which is not satisfied by the users.  
       SUMMARY OF THE INVENTION  
       [0004] Accordingly, the primary object of the present invention is to provide a treading exercising machine with adjustable elliptical track to tilt at two sides thereof. The treading exercise machine has a base. One end of the base having two sides; each side having a respective support frame.  
       [0005] In that, the support frames are pivotally installed with symmetrical sliding grooves. Two sides of another end of the base have respective coaxial cranks. Each crank is pivotally connected to one end of a pedal. Another ends of the two pedals are connected to sliding wheels. The sliding wheels are received in the sliding groove so as to move therein. The two sliding grooves with a predetermined length have respective axial rods at the outer middle sides thereof so that the sliding grooves are pivotally installed to the support frames.  
       [0006] Thereby, the sliding grooves are adjustable along the support frames to adjust tilting angles at the two sides; thus, elliptical tracks of the pedals are changed to present operations of moving upwards, downwards and flatly.  
       [0007] The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.  
     
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
     [0008]FIG. 1 is a schematic view showing the structure of the present invention.  
     [0009]FIG. 2 is an assembled plane view showing the structure of the present invention.  
     [0010]FIG. 3 is a schematic view showing another orientation of FIG. 2.  
     [0011]FIG. 4 is an exploded schematic view of the adjuster according to the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
     [0012] Referring to FIGS.  1  to  3 , the treading exercising machine with adjustable elliptical track to tilt at two sides thereof the present invention. The machine has a base  10 . One end of the base  10  has two sides. Each side has a respective support frame  11 . The support frames  11  are pivotally installed with symmetrical sliding grooves  20 . Another end of the base  10  have a coaxial left and a coaxial right cranks  12 . The left and right cranks  12  are pivotally connected to one end of a left and a right pedals  30 . Another ends of the two pedals  30  are connected to sliding wheels  31 . The sliding wheels  31  can be received in the sliding grooves  20  so as to move therein. The two sliding grooves  20  with a predetermined length have respective axial rod  21  at the outer middle sides thereof so that the sliding grooves  20  can be pivotally installed to the support frames  11 . Thereby, the sliding grooves  20  are adjustable along the support frames  11  to adjust leftward and rightward tilt angles (referring to FIG. 4). Thus, the elliptical tracks of the pedals  30  are changed to present the operation of moving upwards, downwards and flatly. An angle adjuster is installed between bottoms of the sliding grooves  20  and the base  10  so that the oblique angle of the sliding groove  20  is changeable and can be positioned after adjustment.  
     [0013] The angle adjuster  40  includes an H type frame  41  pivotally installed to the bottoms of the two symmetrical sliding grooves  20 . A bottom of the H type frame  41  is pivotal with a push rod  42 . Two sides of the push rod  42  have guide holes  421  for being firmly secured to the two guide rods  13  of the base  10 . A screw hole  422  is formed at a middle rod of the H type frame. Two opposite inner sides of the support frames  11  are formed with symmetrical guide rods  13 . A lifting motor  50  is installed at a predetermined position of the base  10 . The screw rod  51  of the lifting motor  50  is screwed into the screw hole  422  of the push rod  42 .  
     [0014] By above structure, when the lifting motor is actuated, the screw rod  51  will drive the push rod  42  to move forwards and backwards so as to drive the H type frame  41  pivotally installed to the push rod  42  to move synchronously. Thereby, the oblique angle of the sliding grooves  20  at the upper end of the H type frame  41  is changed leftwards or rightwards. Thus, when the left and right pedals  30  of the two sliding grooves  20  are operated, a different elliptical track is generated. If the sliding groove  20  is adjusted to tilt rightwards (referring to FIG. 2), when the left and right pedals  30  move, an elliptical track for simulating a downward move is generated. If the sliding grooves  20  moves leftwards (referring to FIG. 3), when the left and right pedals  30  move, an elliptical track for simulating an upward move is generated. When the sliding grooves  20  are adjusted to be in horizontal condition, an elliptical track as to move flatly is generated.  
     [0015] The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.