Stretch strap of a chair

Abstract

A stretch strap of a chair has multiple stretch ropes and a soft sleeve. The soft sleeve receives the two stretch ropes therein. Each stretch rope has multiple rubber cords and a covering layer binding the rubber cords therein. Since the covering layer is a weave, so there are gaps on the covering layer and a concave is formed between the two adjacent stretch ropes, when the stretch ropes are tied together. However, the woven covering layer is inside of the soft sleeve, the soft sleeve prevents dirt from receiving in the gaps and the concaves. In addition, a chair user directly sits on the soft sleeve not on the woven covering layers and feels comfortable.

1 . A stretch strap of a chair comprising:
 at least two stretch ropes, each of which comprises:   multiple rubber cords; and   a covering layer receiving the multiple rubber cords therein; and   a soft sleeve receiving the at least two stretch ropes therein.   
   
   
       2 . The stretch strap as claimed in  claim 1 , wherein the soft sleeve is made of elastic cloth. 
   
   
       3 . The stretch strap as claimed in  claim 1 , wherein the covering layer is a weave. 
   
   
       4 . The stretch strap as claimed in  claim 2 , wherein the covering layer is a weave.