Backpack

Abstract

A backpack including a bag, at least one strap and an air pump is disclosed. The at least one strap is connected to the bag for a user to carry the bag and the air pump is disposed on the bag at either one of a position between a user's back and the bag and a position on the strap which faces the user's shoulder. The air pump is elastic and deformable and includes a first lateral part and a second lateral part opposite to the first lateral part. An air chamber is formed between the first lateral part and the second lateral part, and the first lateral part is formed with a plurality of air holes communicating with the air chamber and the outside. The pump further includes a plurality of elastic parts located in the air chamber to connect the first lateral part and the second lateral part.

What is claimed is: 
     
         1 . A backpack, comprising:
 a body including a bag and at least one strap, wherein the bad is adapted to store objects; the at least one strap has two ends connected to the bag for a user's shoulder to carry the bag; and   an air pump disposed on the body, wherein the air pump is located on at least one of a position between a back of a user and the bag and another position on the at least one strap which faces the user's shoulder when the user uses the backpack; the air pump is elastic and deformable and includes a first lateral part and a second lateral part which are opposite to each other, and the second lateral part is located on at least one of a position between the bag and the first lateral part and another position between the first lateral part and the at least one strap; an air chamber is formed between the first lateral part and the second lateral part, and the first lateral part is formed with a plurality of air holes communicating with the air chamber and the outside; the air pump further includes a plurality of elastic parts which are located in the air chamber and connect the first lateral part and the second lateral part.   
     
     
         2 . The backpack of  claim 1 , wherein the first lateral part includes a plurality of recesses which are opposite to the second lateral part, and each of at least part of the recesses has one of the air holes. 
     
     
         3 . The backpack of  claim 2 , wherein the first lateral part further includes a plurality of grooves for communicating at least two adjacent ones of the recesses. 
     
     
         4 . The backpack of  claim 3 , wherein a depth of each of the recesses is greater than a depth of each of the grooves. 
     
     
         5 . The backpack of  claim 1 , wherein two ends of each of the elastic parts for connecting to the first lateral part and the second lateral part have diameters larger than a diameter of a central portion of each of the elastic parts. 
     
     
         6 . The backpack of  claim 1 , wherein the first lateral part has a plurality of protrusions opposite to the second lateral part; the air holes are disposed between two adjacent ones of the protrusions; each of the protrusions is located on an extended axial line of a corresponding one of the elastic parts. 
     
     
         7 . The backpack as claimed in  claim 1 , wherein the pump includes a first part and a second part; the first part has the first lateral part, and the second part has the second lateral part; the first part and the second part respectively have a plurality of elastic units which match with each other; corresponding ones of the elastic units abut against each other to form a corresponding one of the elastic parts after the first part and second part are aligned and joined to each other. 
     
     
         8 . The backpack of  claim 1 , wherein the body includes a breathable bag, and the air pump is disposed in the breathable bag. 
     
     
         9 . The backpack of  claim 1 , wherein the air pump is detachably disposed on the backpack. 
     
     
         10 . The backpack of  claim 9 , wherein a hook side of a Velcro strap is disposed on either one of the body and the air pump, and a loop side of the Velcro strap is disposed on the other; the hook side and the loop side attach to each other.