Backpack assembly having carrying accessory with back plate

Abstract

A backpack assembly includes a bag body and a carrying accessory. The carrying accessory includes a back plate, a bag strap, and a waistband. The back plate has a first engaging portion and a second engaging portion which are opposite to each other, and has a middle portion located between the first engaging portion and the second engaging portion. The first engaging portion is adapted to be engaged with the bag body. A first connecting hole is disposed on the middle portion. The bag strap has two shoulder straps and a first connecting strap which passes through the first connecting hole. A first fastening member is disposed on each of the shoulder straps. The waistband engaged with the second engaging portion is connected to the first fastening members. With such design, the backpack assembly could be engaged with different bag bodies with different functions, different capacities, or different sizes.

What is claimed is: 
     
         1 . A carrying accessory, which is adapted to be connected to a bag body, comprising:
 a back plate having a first engaging portion and a second engaging portion which are opposite to each other, wherein the first engaging portion is adapted to be engaged with the bag body; the back plate has a middle portion located between the first engaging portion and the second engaging portion, and one or more first connecting hole is disposed on the middle portion;   a bag strap having two shoulder straps and a first connecting strap, wherein a first fastening member is disposed on each of the shoulder straps; the first connecting strap passes through the one or more first connecting hole; and   a waistband engaged with the second engaging portion and connected to the first fastening members.   
     
     
         2 . The carrying accessory of  claim 1 , wherein the middle portion comprises at least two first connecting holes, and the first connecting strap passes through at least two of the at least two first connecting holes to be engaged with the bag strap. 
     
     
         3 . The carrying accessory of  claim 1 , wherein a first adhesive portion is disposed on the middle portion of the back plate; the bag strap has a strap body connected to the shoulder straps and the first connecting strap; a second adhesive portion is disposed on the strap body for being detachably engaged with the first adhesive portion. 
     
     
         4 . The carrying accessory of  claim 3 , wherein the strap body is connected to an engaging member; when the first connecting strap passes through the one or more first connecting hole, the first connecting strap is engaged with the engaging member. 
     
     
         5 . The carrying accessory of  claim 1 , wherein a second connecting hole is disposed on the second engaging portion of the back plate; the waistband is connected to a second connecting strap; the second connecting strap passes through the second connecting hole and is then engaged with an engaging portion disposed on the waistband. 
     
     
         6 . The carrying accessory of  claim 1 , wherein the waistband has a pocket, and the second engaging portion is inserted into the pocket. 
     
     
         7 . The carrying accessory of  claim 1 , wherein the waistband is connected to two second fastening members which are respectively and detachably engaged with the first fastening members. 
     
     
         8 . The carrying accessory of  claim 1 , wherein a first bulging portion is formed on the middle portion of the back plate, and a plurality of second bulging portions are respectively formed on two lateral sides of the middle portion; a groove is formed between each adjacent second bulging portions and is formed between each of the second bulging portions and the first bulging portion. 
     
     
         9 . A backpack assembly, comprising:
 a bag body; and   a carrying accessory, which is adapted to be connected to the bag body, comprising:
 a back plate having a first engaging portion and a second engaging portion which are opposite to each other, wherein the first engaging portion is adapted to be engaged with the bag body; the back plate has a middle portion located between the first engaging portion and the second engaging portion, and one or more first connecting hole is disposed on the middle portion; 
 a bag strap having two shoulder straps and a first connecting strap, wherein a first fastening member is disposed on each of the shoulder straps; the first connecting strap passes through the one or more first connecting hole; and 
 a waistband engaged with the second engaging portion and connected to the first fastening members. 
   
     
     
         10 . The carrying accessory of  claim 9 , wherein a first adhesive portion is disposed on the middle portion of the back plate; the bag strap has a strap body connected to the shoulder straps and the first connecting strap; a second adhesive portion is disposed on the strap body for being detachably engaged with the first adhesive portion. 
     
     
         11 . The carrying accessory of  claim 9 , wherein a second connecting hole is disposed on the second engaging portion of the back plate; the waistband is connected to a second connecting strap; the second connecting strap passes through the second connecting hole and is then engaged with an engaging portion disposed on the waistband. 
     
     
         12 . The backpack assembly of  claim 9 , wherein the bag body has an engaging pocket, and the first engaging portion of the back plate is inserted into the engaging pocket. 
     
     
         13 . The backpack assembly of  claim 9 , wherein a plurality of engaging rings are disposed on the bag body, and a plurality of engaging holes are disposed on two lateral sides of the back plate; the backpack assembly comprises an engaging strap adapted to be passed through at least one of the engaging holes and at least one of the engaging rings. 
     
     
         14 . The backpack assembly of  claim 9 , wherein two first engaging portions are disposed on an upper half portion of the bag body, and two positioning holes are disposed on the back plate, and a second engaging portion is disposed on each of the shoulder straps; the first engaging portions disposed on the upper half portion of the bag body respectively pass through the positioning holes, and are respectively engaged with the second engaging portions on the shoulder straps then. 
     
     
         15 . The backpack assembly of  claim 9 , wherein two third engaging portions are disposed on a lower half portion of the bag body, and two fourth engaging portions are disposed on the waistband; the fourth engaging portions are respectively engaged with the third engaging portions. 
     
     
         16 . A back plate, which is adapted to be engaged with a bag body; the back plate is characterized in that:
 the back plate has a first engaging portion and a second engaging portion which are opposite to each other, wherein the first engaging portion is adapted to be engaged with the bag body, and the second engaging portion is adapted to be engaged with a waistband; the back plate has a middle portion located between the first engaging portion and the second engaging portion, wherein the middle portion is adapted to be engaged with a bag strap.   
     
     
         17 . The back plate of  claim 16 , wherein the middle portion of the back plate has two first connecting holes; one of the first connecting holes is disposed closer to the first engaging portion than the second engaging portion, while another first connecting hole is disposed closer to the second engaging portion than the first engaging portion; the first connecting holes are adapted to be penetrated through by a first connecting strap of the bag strap. 
     
     
         18 . The back plate of  claim 16 , wherein a second connecting hole is disposed on the second engaging portion of the back plate and is adapted to be passed through by a second connecting strap connected to the waistband, thereby to engage the back plate and the waistband. 
     
     
         19 . The back plate of  claim 16 , wherein a plurality of engaging holes are disposed on two lateral sides of the middle portion of the back plate. 
     
     
         20 . The back plate of  claim 16 , wherein a first bulging portion is formed on the middle portion, and a plurality of second bulging portions are formed on two lateral sides of the middle portion; a groove is formed between each adjacent second bulging portions and is formed between the first bulging portion and the second bulging portions.