Adjustable shoestring device

Abstract

An adjustable shoestring includes an elastic shoestring body and a fastener coupled to the body. The body includes an elastic rope ribbon, a buckle hole, and engaging balls spaced equidistantly configured on the right side of the rope ribbon. The fastener includes a through hole allowing the right end of the body to be passed through, a buckle stub buckled with buckle hole and a slot engaged securely with the ball on the right of the ribbon; the through hole allows the balls on the ribbon to be passed through. Engaging balls may be configured on the left side of the rope ribbon optionally. The adjustable shoestring device can be properly adjusted depending on the size of a foot. The present invention has multiple safety designs, and the end portion of a longer shoestring may be cut off. The shoestring will not be treaded and a person wearing a shoe with the shoestring will not fall down.

I claim: 
     
         1 . An adjustable shoestring device, comprising:
 an elastic shoestring body, comprising an elastic rope ribbon, a buckle hole configured on a left side of said elastic rope ribbon, and a plurality of engaging balls configured on a right side of said elastic rope ribbon;   a fastener, coupled cooperatively to said elastic shoestring body, configured with a through hole for allowing a right side end of said elastic shoestring body to be passed through, a buckle stub adapted to buckle with said buckle hole, and a slot adapted to engage securely with said engaging ball on said right side of said elastic rope ribbon.   
     
     
         2 . The adjustable shoestring device according to  claim 1 , wherein said buckle stub is an obtuse column. 
     
     
         3 . The adjustable shoestring device according to  claim 1 , wherein a diameter of said engaging ball matches with a width of said slot, allowing said engaging ball to be engaged with said slot securely. 
     
     
         4 . The adjustable shoestring device according to  claim 1 , wherein at least two engaging balls spaced distantly are configured on a right side of said elastic shoestring body. 
     
     
         5 . The adjustable shoestring device according to  claim 1 , wherein engaging balls are configured on a left side of said elastic shoestring body 
     
     
         6 . The adjustable shoestring device according to  claim 1 , wherein said elastic shoestring body is made of rubber. 
     
     
         7 . The adjustable shoestring device according to  claim 1 , wherein said fastener is made of hard plastics. 
     
     
         8 . The adjustable shoestring device according to  claim 1 , wherein a distance between said through hole and said slot of said fastener is the same as a distance between said two adjacent engaging balls. 
     
     
         9 . The adjustable shoestring device according to  claim 4 , wherein said engaging balls configured on said right side of said elastic shoestring body are spaced equidistantly. 
     
     
         10 . The adjustable shoestring device according to  claim 1 , wherein said elastic shoestring body is integrated with said fastener by means of injection molding during manufacturing, said buckle stub on said fastener and said buckle hole on said left side of said elastic rope ribbon are all omitted upen said one piece manufacturing.