Elastic cord and pull exerciser having the same

Abstract

A pull exerciser includes at least one attachment device, at least one positioning device coupled to the at least one attachment device, and at least one elastic cord. The positioning device includes at least one positioning hole. At least one of two ends of the elastic cord is hollow and engaged in the positioning hole. The end of the elastic cord includes an inner section and a turnback section surrounding the inner section. The end of the elastic cord and a distal end portion of the turnback section are engaged in the positioning hole. A stop is mounted in the end of the elastic cord and securely held by the inner section and the turnback section. The stop has an outer diameter larger than a diameter of the positioning hole.

1 . A pull exerciser comprising: 
 at least one attachment device comprising a handle;    at least one positioning device coupled to said at least one attachment device, said at least one positioning device including at least one positioning hole; and    at least one elastic cord having two ends, at least one of the ends of said at least one elastic cord being hollow and engaged in said at least one positioning hole, said at least one of the ends of said at least one elastic cord including an inner section and a turnback section surrounding the inner section, said at least one of the ends of said at least one elastic cord and a distal end portion of said turnback section being engaged in said at least one positioning hole, a stop being mounted in said at least one of the ends of said elastic one elastic cord and securely held by the inner section and the turnback section, the stop having an outer diameter larger than a diameter of said at least one positioning hole.    
   
   
       2 . The pull exerciser as claimed in  claim 1  wherein said at least one positioning device comprises two positioning plates each including at least one positioning hole that is in communication with outside via a reduced opening.  
   
   
       3 . The pull exerciser as claimed in  claim 1  wherein said at least one elastic cord is hollow.  
   
   
       4 . The pull exerciser as claimed in  claim 1  wherein the turnback section is longer than the stop.  
   
   
       5 . An elastic cord for a pull exerciser, the elastic cord comprising a hollow end, the hollow end including an inner section and a turnback section surrounding the inner section, a stop being mounted in the hollow end to form a bulge, the stop being securely held by the inner section and the turnback section.  
   
   
       6 . The elastic cord for a pull exerciser as claimed in  claim 5  wherein the inner section and a distal end portion of said turnback section are adapted to be engaged in a positioning hole of a positioning device of a pull exerciser to which the elastic cord is attached.  
   
   
       7 . The elastic cord for a pull exerciser as claimed in  claim 5  wherein the turnback section has a length larger than that of the stop.  
   
   
       8 . The elastic cord for a pull exerciser as claimed in  claim 5 , wherein the stop is ellipsoidal or cylindrical.