Exercising device

Abstract

An exercising device includes a mounting rod supported on a floor. Right and left shafts respectively have lower ends secured to the mounting rod and define first and second axes. Right and left tubular members are sleeved on and are rotatable relative to the right and left shafts about the first and second axes, respectively. Right and left treadles are respectively anchored to the right and left tubular members to be rotatable therewith. A pull rope includes first and second ends respectively secured to the right and left tubular members, and an intermediate friction segment wound around a rim of a pulley member which is spaced apart from the mounting rod.

I claim:  
     
         1 . An exercising device comprising: 
 a mounting rod adapted to be supported on a floor surface, and including right and left portions opposite to each other in a longitudinal direction, and an intermediate portion interposed between said right and left portions;    right and left shafts respectively defining first and second axes and having right and left lower ends secured to said intermediate portion proximate to said right and left portions respectively, and right and left upper ends respectively opposite to said right and left lower ends in a respective one of first and second upright directions, the first and second upright directions being parallel to the first and second axes, respectively;    right and left tubular members respectively disposed to sleeve on and to be rotatable relative to said right and left shafts about the first and second axes respectively, said right tubular members including right upper and lower tubular portions opposite to each other in the first upright direction, said left tubular member including left upper and lower tubular portions opposite to each other in the second upright direction;    a right treadle including right proximate and distal portions opposite to each other in a first radial direction relative to the first axis;    a left treadle including left proximate and distal portions opposite to each other in a second radial direction relative to the second axis, said right and left proximate portions being anchored to and rotating with said right and left upper tubular portions, respectively;    a pulley member disposed to be rotatable about a third axis and spaced apart from said intermediate portion in a first transverse direction relative to the longitudinal direction, said pulley member including upper and lower major friction surfaces opposite to each other, and a rim disposed to surround the third axis and to join said upper and lower major friction surfaces; and    a pull rope including first and second ends respectively secured to said right and left lower tubular portions, and an intermediate friction segment interconnecting said first and second ends and disposed to be wound around said rim such that when said right lower tubular portion is turned about the first axis counterclockwise by an outward and laterally treading action of the right foot of a user stepping on said right treadle, said second end is pulled by said first end to twist said left lower tubular portion to turn counterclockwise, thereby producing a resistance to an outward and laterally treading action of the left foot of the user stepping on said left treadle to move said left lower tubular portion to turn clockwise via said left upper tubular portion.    
     
     
         2 . The exercising device according to  claim 1 , further comprising a support rod disposed to be spaced apart from and parallel to said mounting rod, a support bar extending in the first transverse direction to interconnect said intermediate portion and said support rod, and a mounting axle disposed on said support bar and extending along the third axis so as to be mounted rotatably with said pulley member.  
     
     
         3 . The exercising device according to  claim 2 , further comprising an upper friction member mounted on said mounting axle and movable along the third axis, said upper friction member including a downward friction-braking surface disposed to face and to be movable toward said upper major friction surface of said pulley member so as to create a dragging force applied to said upper major friction surface, thereby producing an increased resistance to the pulling of either one of said first and second ends of said pull rope.  
     
     
         4 . The exercising device according to  claim 3 , further comprising a lower friction member mounted on said mounting axle and disposed at the opposite side of said pulley member relative to said upper friction member, said lower friction member including an upward friction-braking surface facing said lower major friction surface of said pulley member to create a dragging force applied to said lower major friction surface when said upper friction member is moved toward said pulley member, thereby bringing said lower major friction surface into frictional contact with said upward friction-braking surface so as to produce an increased resistance to the pulling of either one of said first and second ends of said pull rope.  
     
     
         5 . The exercising device according to  claim 4 , further comprising a thrusting member mounted on said mounting axle and movable toward said upper major friction surface along the third axis, and a friction adjusting member which is disposed outboard to and which abuts against said thrusting member, said friction adjusting member engaging threadedly said mounting axle such that screwing movement of said friction adjusting member along the third axis will bring said downward friction-braking surface of said upper friction member toward or away from said upper major friction surface so as to increase or reduce the dragging force.  
     
     
         6 . The exercising device according to  claim 5 , wherein said thrusting member is provided with a periphery surrounding the third axis, and a retaining wall extending from said periphery in an axial direction parallel to the third axis and toward said lower friction member such that said pull rope is prevented from slipping from said rim of said pulley member.  
     
     
         7 . The exercising device according to  claim 6 , wherein said rim has an inwardly and radially extending annular groove for receiving said pull rope.  
     
     
         8 . The exercising device according to  claim 7 , wherein said right and left shafts are inclined respectively toward said right and left portions of said mounting rod.  
     
     
         9 . The exercising device according to  claim 8 , further comprising right and left linking arms which respectively include right and left coupling ends coupled to rotate with a respective one of said right and left lower tubular portions, and right and left connected ends extending respectively from said right and left coupling ends in two radial directions relative to the first and second axes respectively and connected to said first and second ends of said pull rope, respectively.  
     
     
         10 .The exercising device according to  claim 9 , further comprising right and left levers which respectively include right and left anchoring ends secured to rotate with a respective one of said right and left upper tubular portions, and right and left seat ends extending respectively from said right and left anchoring ends in two radial directions relative to the first and second axes respectively and supporting said right and left treadles, respectively.