Structure of exercise cord

Abstract

The present invention relates to a structure of exercise cord, which includes at least one elastic cord having two ends of which at least one is provided with a grip. The grip has two ends at top side extending between which is a handhold and a base seat is provided at the side opposite to the handhold. The base seat forms three retainer seats that extend through a bottom of the base seat. Each of the retainer seats has an upper end forming a circumferential recess and including therein a clamp extending to middle of the retainer seat. Three anchoring plugs are each provided with a retention rim at an upper end thereof and forming a cord extension hole in a lower end and also including a coupling section formed on a side thereof. The three anchoring plugs are respectively receivable in the thee retainer seats.

I claim: 
     
         1 . A structure of exercise cord, comprising at least one elastic cord having two ends of which at least one is provided with a grip, the grip having two ends at top side extending between which is a handhold and a base seat being provided at the side opposite to the handhold, the base seat forming three retainer seats that extend through a bottom of the base seat, each of the retainer seats having an upper end forming a circumferential recess and comprising therein a clamp extending to middle of the retainer seat, three anchoring plugs being each provided with a retention rim at an upper end thereof and forming a cord extension hole in a lower end and also comprising a coupling section formed on a side thereof, the three anchoring plugs being respectively receivable in the thee retainer seats;
 characterized in that the elastic cord is received through the lower end cord extension hole of one of the anchoring plugs whereby when the anchoring plug is set in the corresponding retainer seat, the side coupling section of the anchoring plug is in close engagement with the clamp of the retainer seat so as to restrain the elastic cord in the space between the retainer seat and the anchoring plug.   
     
     
         2 . The structure of exercise cord according to  claim 1 , wherein the elastic cord is received in the cord extension hole in such a way that a leading end section of the elastic cord forms an upper folded section, while a tailing end section forms a lower folded section. 
     
     
         3 . The structure of exercise cord according to  claim 1 , wherein the elastic cord is received through the anchoring plug in such a way that the anchoring plug is only removable by simultaneously holding the upper folded section and the lower folded section to apply a force in a direction toward the handhold in order to allow a user to adjust magnitude of elastic force thereof. 
     
     
         4 . The structure of exercise cord according to  claim 2 , wherein the elastic cord is received through the anchoring plug in such a way that the anchoring plug is only removable by simultaneously holding the upper folded section and the lower folded section to apply a force in a direction toward the handhold in order to allow a user to adjust magnitude of elastic force thereof. 
     
     
         5 . The structure of exercise cord according to  claim 1 , wherein each of the retainer seats has an upper end forming a circumferential recess and each of the anchoring plugs forms a retention rim at an upper end thereof, the retention rim being engageable with the circumferential recess when the anchoring plug is received in the retainer seat to enhance tight engagement therebetween.