Assembled backpack

Abstract

An assembled backpack includes a main compartment and an additional compartment. At least one first engaging member is disposed on the main compartment, and a strap is engaged with the main compartment. The additional compartment has a first side edge portion provided with a second engaging member and a second side edge portion provided with a second engaging member which are opposite to each other. The second engaging member of one of the first side edge portion and the second engaging member is detachably connected to the first engaging member, so the additional compartment is connected to the main compartment. The additional compartment has a first cloth and a second cloth positioned facing opposite directions. A first sealing member is disposed at an edge of a first opening of the first cloth. A second sealing member is disposed at an edge of a second opening of the second cloth.

What is claimed is: 
     
         1 .  1 . An assembled backpack, comprising:
 a main compartment having an inner surface for facing a human body and provided with at least one first engaging member;   at least one strap engaged with the main compartment;   an additional compartment having a first side edge portion and a second side edge portion positioned at opposite ends, the first side edge portion is provided with a second engaging member and the second side edge portion is provided with a second engaging member; one of the second engaging member of the first side edge portion and the second engaging member of the second side edge portion is detachably connected to the at least one first engaging member, so that the additional compartment is connected to the main compartment; a virtual center line is defined between the first side edge portion and the second side edge portion of the additional compartment; the additional compartment having a first cloth and a second cloth which face opposite directions, wherein one of the first cloth and the second cloth facing away from the inner surface; the first cloth has a first opening communicating with an interior of the additional compartment; the second cloth has a second opening communicating with the interior of the additional compartment; the first opening is disposed between the first side edge portion and the virtual center line, and the second opening is disposed between the second side edge portion and the virtual center line;   a first sealing member disposed at the first cloth for opening or closing the first opening; and   a second sealing member disposed at the second cloth for opening or closing the second opening.   
     
     
         2 . The assembled backpack of  claim 1 , wherein the at least one first engaging member includes at least one pair of first engaging straps; each of the second engaging members includes two second engaging straps; the two second engaging straps of one of the first side edge portion and the second side edge portion are respectively detachably connected to the at least one pair of first engaging straps. 
     
     
         3 . The assembled backpack of  claim 2 , wherein the main compartment has an outer surface facing away from the inner surface; the at least one pair of first engaging straps includes a plurality of pairs of first engaging straps, the plurality of pairs of first engaging straps include a first pair of first engaging straps positioned higher than other pairs of first engaging straps; when the two second engaging straps of one of the first side edge portion and the second side edge portion of the additional compartment are connected to the first pair of first engaging straps, the additional compartment is outside the outer surface, and one of the first cloth and the second cloth faces the outer surface. 
     
     
         4 . The assembled backpack of  claim 3 , wherein the plurality of pairs of first engaging straps further include a second pair of first engaging straps positioned lower than the first pair of first engaging straps; when the two second engaging straps of one of the first side edge portion and the second side edge portion of the additional compartment are connected to the first pair of first engaging straps, the two second engaging straps of the other one of the first side edge portion and the second side edge portion of the additional compartment are respectively and detachably connected to the second pair of first engaging straps, thereby to form a storage area between the additional compartment and the outer surface. 
     
     
         5 . The assembled backpack of  claim 3 , wherein when the two second engaging straps of one of the first side edge portion and the second side edge portion of the additional compartment are detached from the first pair of first engaging straps, the additional compartment is flappable to be flipped downward, so that the other one of the first cloth and the second cloth faces away from the inner surface. 
     
     
         6 . The assembled backpack of  claim 3 , wherein at least one fastened member is disposed at the outer surface of the main compartment, and the additional compartment covers the at least one fastened member. 
     
     
         7 . The assembled backpack of  claim 4 , wherein at least one fastened member is disposed at the outer surface of the main compartment and is located between the first pair of first engaging straps and the second pair of first engaging straps. 
     
     
         8 . The assembled backpack of  claim 2 , wherein the at least one pair of first engaging straps are located at a bottom of the main compartment; when the two second engaging straps of one of the first side edge portion and the second side edge portion are connected to the at least one pair of first engaging straps, the additional compartment is suspended from the bottom of the main compartment. 
     
     
         9 . The assembled backpack of  claim 8 , wherein the main compartment has an outer surface facing away from the inner surface, and the at least one pair of first engaging straps are located at a bottom of the outer surface. 
     
     
         10 . The assembled backpack of  claim 9 , wherein the additional compartment is flappable to be flipped upwards so that one of the first cloth and the second cloth faces the outer surface. 
     
     
         11 . The assembled backpack of  claim 2 , wherein the main compartment has an outer surface facing away from the inner surface, and the at least one pair of first engaging straps are at the outer surface. 
     
     
         12 . The assembled backpack of  claim 2 , wherein the main compartment has an outer surface facing away from the inner surface; the at least one pair of first engaging straps includes a plurality of pairs of first engaging straps, the plurality of pairs of first engaging straps include a first pair of first engaging straps, a second pair of first engaging straps, a third pair of first engaging straps, and a fourth pair of first engaging straps; the first pair of first engaging straps, the third pair of first engaging straps, the second pair of first engaging straps, and the fourth pair of first engaging straps are sequentially arranged from a high position to a low position; the second pair of first engaging straps and the third pair of first engaging straps are at the outer surface; when the two second engaging straps of one of the first side edge portion and the second side edge portion are connected to the first pair of first engaging straps, the two second engaging straps of the other one of the first side edge portion and the second side edge portion of the additional compartment are respectively and detachably connected to the second pair of first engaging straps; when the two second engaging straps of one of the first side edge portion and the second side edge portion are connected to the third pair of first engaging straps, the two second engaging straps of the other one of the first side edge portion and the second side edge portion of the additional compartment are respectively detachably connected to the fourth pair of first engaging straps. 
     
     
         13 . The assembled backpack of  claim 1 , wherein the additional compartment has at least one storage space therein, and the first opening and the second opening communicate with the at least one storage space. 
     
     
         14 . The assembled backpack of  claim 1 , wherein the first sealing member includes a first zipper, the second sealing member includes a second zipper, and the first zipper and the second zipper are opened in a same direction. 
     
     
         15 . The assembled backpack of  claim 1 , wherein a first fastened member is disposed on the first cloth of the additional compartment, and a second fastened member is disposed on the second cloth of the additional compartment; the first fastened member and the second fastened member have different forms.