Tension guide for shoestring

Abstract

The present disclosure relates to a tension guide for a shoestring. The tension guide includes: a guide base 10 having a spring pocket 15 ; a tension spring 20 disposed in the spring pocket, whose both ends are elastically moved forward and backward as the shoestring 5 is pulled and released; and a guide cover 30 that covers the tension spring in the spring pocket. This gives continuing tension to a tied shoestring and therefore keeps the shoestring as tight as it initially was. Without the tension applied to the shoestring, the shoestring becomes less tight, and therefore the foot will feel loose in the shoe, not as tight as it initially was, and this problem occurring in the conventional art can be avoided by the tension guide. Moreover, the conventional shoestring becomes inadvertently loose, which basically provides an uncomfortable fit and involves other problems like causing the user's foot to move in the shoe or slip out of the shoe, exposing the user to many dangerous situations. This tension guide prevents safety accidents involving the aforementioned problems, and as a result, provides a steady fit to the user.

1 . A tension guide for a shoestring comprising a guide base, a tension spring, and a guide cover,
 the guide base with a spring pocket whose top is open, including:   a bottom face formed on an upper surface;   a base front wall disposed at a front end portion of the bottom face;   a base rear wall disposed at the rear, spaced a predetermined distance from the base front wall; and   a pair of base side walls that connect both ends of the base front wall and both ends of the base rear wall, and that extend upward by a predetermined distance from the bottom face and allow both ends of a shoestring to run outside through the bottom face,   the tension spring is disposed on the bottom face of the spring pocket, and is a coil-shaped tensile spring structure in which the shoestring is passed through an inner through-hole, a middle part is securely attached between the base front and rear walls, and both ends are elastically moved forward and backward as the shoestring is pulled and released,   the guide cover that covers the tension spring in the spring pocket, including:   a ceiling face formed on a lower surface;   cover front and rear walls disposed to correspond to the base front and rear walls; and   a cover side wall corresponding to the base side wall, spaced apart therefrom by a predetermined distance, and forming a string run-through passage.   
     
     
         2 . The tension guide of  claim 1 , wherein the base front wall of the spring pocket is a curved wall structure in which the distance to the base rear wall becomes wider toward both ends, and the corresponding cover front wall of the guide cover also is a curved wall structure in which the distance to the cover rear wall having a linear wall structure becomes wider toward both ends. 
     
     
         3 . The tension guide of  claim 1 , wherein the base front wall of the spring pocket has a damage preventing portion on either end, which protrudes a predetermined length toward the center of the base side wall, in order to prevent both ends of the base front wall from being damaged by the shoestring being pulled through the tension spring. 
     
     
         4 . The tension guide of  claim 1 , wherein the base rear wall of the spring pocket has a damage preventing portion on either end, which protrudes a predetermined length toward the center of the base side wall, in order to prevent both ends of the base rear wall from being damaged as the loose shoestring is pulled backward of the base rear wall. 
     
     
         5 . The tension guide of  claim 1 , wherein the cover front wall of the guide cover has a damage preventing portion on either end, which protrudes a predetermined length toward the center of the cover side wall, in order to prevent both ends of the cover front wall from being damaged by the shoestring being pulled through the tension spring. 
     
     
         6 . The tension guide of  claim 1 , wherein the cover rear wall of the guide cover has a damage preventing portion on either end, which protrudes a predetermined length toward the center of the cover side wall, in order to prevent both ends of the cover rear wall from being damaged as the loose shoestring is pulled backward of the cover rear wall. 
     
     
         7 . The tension guide of  claim 1 , wherein the tension spring is a coil-structure extension spring in which ring-shaped loops are consecutively and securely held together in a helical direction. 
     
     
         8 . The tension guide of  claim 1 , wherein the guide base has positioning guide grooves recessed downward from an upper surface of the base front and rear walls, and the corresponding guide cover has positioning guide projections which protrude downward from a lower surface of the cover front and rear walls and are inserted into the positioning guide grooves so that the guide base and the guide cover are held together in place by contact with each other.