Adjustable Structure for a Strap

Abstract

An adjustable structure for a strap is provided. The adjustable structure comprises a positioning device, a shaft, and a plurality of female fasteners formed on the surface of the strap. The positioning device has a base and a male fastener pivoted on the positioning device. The male fastener is also disposed at the end of the strap. The shaft is disposed opposite the positioning device. Accordingly, the strap is able to pass through between the base and the male fastener, and return back with respect to the shaft. The male fastener is then adapted to detachably connect with the female fastener, and thus the distance between the positioning device and the shaft is adjustable.

1 . An adjustable structure for a strap, which includes a body having an end portion, the adjustable structure comprising:
 a positioning device having a base and a male fastener pivoted on the base;   a shaft being disposed opposite to the positioning device; and   a plurality of female fasteners being formed on a surface of the body;   wherein the body extending through the positioning device between the base and the male fastener, and traveling back around the shaft, the body of the strap connects the male fastener at the end portion thereof, and the male fastener is adapted to detachably engage with at least one of the female fasteners, in such a way that a distance defined between the positioning device and the shaft is adjustable.   
   
   
       2 . The adjustable structure as claimed in  claim 1 , wherein the strap is made of an elastic material, whereby the strap is capable of being tightly stretched when the male fastener is engaged with at least one of the female fasteners. 
   
   
       3 . The adjustable structure as claimed in  claim 2 , wherein the male fastener has a pressing part, an engaging part, and a rotating shaft disposed between the pressing part and the engaging part, in which the male fastener is pivoted on the base by the rotating shaft and the engaging part is capable of engaging with at least one of the female fastener, whereby the male fastener is capable of rotating about the rotating shaft to be detached from the engaged female fastener when the pressing part is pressed by a downward force. 
   
   
       4 . The adjustable structure as claimed in  claim 3 , wherein the female fasteners is defined by a ratchet contour continuously formed on the surface of the strap such that the positioning device tends to depart from the shaft rather than towards the shaft. 
   
   
       5 . The adjustable structure as claimed in  claim 3 , wherein the end portion of the body is formed with a fastening aperture, in which the pressing part of the male fastener is capable of passing through the fastening aperture to connect with the end portion of the body. 
   
   
       6 . The adjustable structure as claimed in  claim 3 , wherein the base has a bottom portion and two opposite sidewalls extending from the bottom portion, in which an accommodating space is defined by the bottom portion, the sidewalls, and the male fastener for the body to pass through. 
   
   
       7 . The adjustable structure as claimed in  claim 6 , wherein each of the sidewalls has a spindle hole corresponding with each other, in which the rotating shaft of the male fastener is pivoted on the spindle holes. 
   
   
       8 . The adjustable structure as claimed in  claim 6 , wherein the base further comprises a rod being connected with the sidewalls therebetween, in which the body is fixed with the pressing part of the male fastener at the end portion thereof and extends towards the shaft through the rod. 
   
   
       9 . The adjustable structure as claimed in  claim 3 , wherein the female fasteners are defined by recesses or holes continuously formed on the surface of the strap. 
   
   
       10 . The adjustable structure as claimed in  claim 2 , wherein the elastic material is one of silicone and rubber.