Exercise machine with adjustable tension

Abstract

An exercise machine has an exercise machine body, and the exercise machine body is combined with a soft pad, such that a user can put both knees onto the soft pad for abdominal or hip exercises. The exercise machine body has a base, an upper cover, an elastic line, a sliding set, an adjusting device and an adjusting screw.

1 . An exercise machine with adjustable tension, the exercise machine comprising an exercise machine body, the exercise machine body comprising a base, an upper cover, an elastic line, a sliding set, an adjusting device and an adjusting screw; wherein the base has a platform, two first sliding tracks formed between two respective pairs of raised first stopping sidewalls on two sides of a top of the platform such that a docking space is forming between the two first sliding tracks; a first bar pivoted to a rear section of the docking space, the upper cover capable of covering the base to form a closed space; the upper cover having two pairs of second stopping sidewalls and two seconds sliding tracks corresponding to the first stopping sidewalls and the first sliding tracks of the base; wherein the upper cover is configured to provide a respective gap between each first sliding track and corresponding second sliding track when the upper cover covers the base; the sliding set having a second bar, and the second bar having a jacketed handle at each end and a roller respectively adjacent to the handle;
 at least one protruding limiting edge respectively formed at a front section of the both stopping sidewalls in the docking space of the base, each limiting edge disposed a predetermined distance from the top of the platform to form an installation gap; a curved first stopping edge and a second stopping edge respectively disposed at a central position on a front face of the base and the upper cover; both ends of the elastic line line having an enlarged portion; the adjusting device comprising a bottom casing and a top cover; the bottom casing having a positioning slot with a rear opening at a center position, a threaded aperture corresponding to the positioning slot at a front end of the bottom casing for accepting the adjusting screw, two securing slots with narrow openings respectively parallel with two sides of the positioning slot, and an extended wing respectively formed on two side of a bottom face of the bottom casing; the adjusting screw having a threaded section, a knob at one end and a stopping member at another end;   wherein with the above mentioned structure, the bottom casing utilizes the extending wings to slide into the installation gap formed by the limiting edge of the base and the top of the platform, with an interaction with the limiting edge and the extending wings, the bottom casing is capable of moving along the docking space of the base; the sliding set utilizing the roller to engage with the sliding track; the docking space accepting the second bar and the handle extending from two sides of the base to position the sliding set; the enlarged portion at each end of the elastic line line attached to a rear end of each securing slot on one side of the bottom casing, and each elastic line line pulled to respectively wrap around the first bar and the second bar such that the other end of each elastic line line is also attached to the securing slot at other side of the bottom casing; the adjusting screw disposed on the first stopping edge of the base and engaged with the threaded section and the threaded aperture of the bottom casing, and the stopping member installed at the end of the adjusting screw for defining a maximum stroke for the adjusting screw; the knob of the adjusting screw disposed in front of the base; the top cover and the upper cover separately displaced on the bottom casing and the base for securing the elastic line.   
     
     
         2 . The exercise machine with adjustable tension as claimed in  claim 1 , wherein the exercise machine body further comprises a soft pad. 
     
     
         3 . The exercise machine with adjustable tension as claimed in  claim 1 , wherein the first stopping edge at the front face of the base extends upwardly to form a stopping slot. 
     
     
         4 . The exercise machine with adjustable tension as claimed in  claim 1 , wherein two extended supporting pedestals are respectively disposed at the front face and the rear face of the base and lift up the base. 
     
     
         5 . The exercise machine with adjustable tension as claimed in  claim 1 , wherein the elastic line line is an elastic woven line or rubber elastic line. 
     
     
         6 . The exercise machine with adjustable tension as claimed in  claim 1 , wherein the threaded aperture of the bottom casing is a screw nut. 
     
     
         7 . The exercise machine with adjustable tension as claimed in  claim 1 , wherein the adjusting screw has an extended portion and a threaded section, and the knob is secured on to a freed end of the extended portion. 
     
     
         8 . The exercise machine with adjustable tension as claimed in  claim 1 , wherein the stopping member of the adjusting screw is a C-shaped hook.