Pull cord for exercising device

Abstract

A pull cord for an exercising device includes an elastic cord body, and an outer layer mounted on an outer surface of the cord body. Thus, the outer layer is formed by the knitting yarns which are knitted onto and enclosed around the outer surface of the cord body so as to protect the cord body efficiently, so that the cord body does not directly contact a user's hands, thereby preventing the cord body from being worn out, and thereby enhancing the lifetime of the cord body. In addition, when the cord body is broken due to tensile action during a long-term utilization, the broken cord body is enclosed in the outer layer, thereby preventing the broken cord body from hurting the user's body.

1 . A pull cord, comprising: 
 an elastic cord body;    an outer layer mounted on an outer surface of the cord body.    
   
   
       2 . The pull cord in accordance with  claim 1 , wherein the outer surface of the cord body has a whole length that is enclosed by the outer layer completely and closely.  
   
   
       3 . The pull cord in accordance with  claim 1 , wherein the outer layer is formed by a plurality of knitting yarns.  
   
   
       4 . The pull cord in accordance with  claim 3 , wherein the knitting yarns are knitted onto and enclosed around the outer surface of the cord body by a cylinder type knitting machine.  
   
   
       5 . The pull cord in accordance with  claim 3 , wherein the knitting yarns have different colors.  
   
   
       6 . The pull cord in accordance with  claim 4 , wherein the knitting machine includes a lower socket, an upper socket mounted on the lower socket, and a plurality of latch needles each mounted on the upper socket and the lower socket to move upward and downward therewith.  
   
   
       7 . The pull cord in accordance with  claim 6 , wherein the upper socket and the lower socket have a connection formed with corrugated slopes matching each other, so that each of the latch needles is moved upward and downward with the corrugated slopes of the upper socket and the lower socket.  
   
   
       8 . The pull cord in accordance with  claim 7 , wherein the corrugated slopes of the upper socket and the lower socket have a number corresponding to that of the knitting yams.  
   
   
       9 . The pull cord in accordance with  claim 6 , wherein the knitting yams are knitted onto and enclosed around the outer surface of the cord body by the latch needles so as to protect the cord body.  
   
   
       10 . The pull cord in accordance with  claim 1 , wherein when the cord body is broken due to tensile action, the broken cord body is enclosed in the outer layer, thereby preventing the broken cord body from hurting a user's body.  
   
   
       11 . The pull cord in accordance with  claim 1 , wherein the outer layer has a smooth outer surface.