Backpack having multiple connecting sites for shoulder straps

Abstract

A backpack includes a body and two shoulder straps, wherein the body includes a rear surface, two connecting portions, and two adjusting portions, wherein the connecting portions and the adjusting portions are disposed on the rear surface. Each adjusting portion includes a plurality of adjusting sites lined vertically on the rear surface. Two shoulder straps are connected to the rear surface of the body. A first end of each shoulder strap is correspondingly connected to one of the connecting portions, and a second end of each shoulder strap has a connector. Each connector is correspondingly connected to one of the adjusting portions, and is connected to one of the adjusting sites. When each connector is connected to different adjusting sites of the corresponding adjusting portion, a height of each shoulder strap and a position of a center of gravity of the backpack could be changed accordingly.

1 . A backpack, comprising:
 a body comprising a rear surface, two connecting portions, and two adjusting portions, wherein the two connecting portions and the two adjusting portions are disposed on the rear surface; each of the adjusting portions comprises a plurality of adjusting sites lined approximately along a substantially longitudinal direction of the backpack on the rear surface; and   two shoulder straps connected to the rear surface of the body, wherein a first end of each of the shoulder straps is correspondingly connected to one of the two connecting portions; a second end of each of the shoulder straps has a connector; each of the connectors is correspondingly connected to one of the two adjusting portions, and is connected to one of the plurality of adjusting sites; when each of the connectors is connected to a different one of the plurality of adjusting sites of one of the two adjusting portions, a height of each of the shoulder straps and a position of a center of gravity of the backpack are changed accordingly;   wherein the plurality of adjusting sites of each of the two adjusting portions is formed by a plurality of rings, and wherein each of the two adjusting portions comprises a strap body that is connected to the rear surface of the body at a plurality of connecting sites; the plurality of connecting sites are spaced from each other and are arranged approximately along the substantially longitudinal direction of the backpack and wherein each of the plurality of rings is formed by a section of the strap body between an adjacent two of the plurality of the connecting sites and the rear surface of the body.   
     
     
         2 . The backpack of  claim 1 , wherein each of the connectors has a first hook that is hooked through one of the plurality of rings. 
     
     
         3 . The backpack of  claim 1 , wherein each of the shoulder straps includes a reinforcing member; a top edge of the body comprises two reinforcing portions; each of the reinforcing members is correspondingly connected to one of the two reinforcing portions. 
     
     
         4 . The backpack of  claim 3 , wherein each of the reinforcing members has a second hook, and the reinforcing portions are two fabric loops; the second hook is hooked through one of the two fabric loops. 
     
     
         5 . The backpack of  claim 3 , wherein each of the reinforcing members is connected to the second end of one of the shoulder straps via a reinforcing strap; an end of each of the-reinforcing straps is connected to one of the reinforcing members, and another end of each of the reinforcing straps is connected to the second end of one of the shoulder straps. 
     
     
         6 . The backpack of  claim 3 , wherein one end of each of reinforcing straps is connected to one of the reinforcing members, and the other end of each of the reinforcing straps is connected to an adjusting ring; the adjusting ring is slidably connected to an adjustable strap, so that each of the reinforcing straps is adjustable by sliding the adjusting ring on the adjustable strap. 
     
     
         7 . The backpack of  claim 6 , wherein the reinforcing straps are detachably connected to the adjusting rings, and an end of each of the reinforcing straps which is connected to one of the adjusting rings is adjustable, in order to adjust a using length of each of the reinforcing straps. 
     
     
         8 . The backpack of  claim 1 , wherein the first end of each of the shoulder straps is connected to one of the two connecting portions. 
     
     
         9 . The backpack of  claim 1 , wherein the first end of each of the shoulder straps is detachably connected to one of the two connecting portions.