Backpack frame

Abstract

A backpack including a pocket demarcated by a dorsal wall opposite the back of the user when the backpack is carried, and a frame partially fixed to the dorsal wall, the frame including a structural portion for shaping the dorsal wall. The frame includes an extension, connected to the structural portion, extending towards the back of the user from the structural portion, the extension being designed and arranged so as to define a support section located in the area of the lumbar zone of the user when the backpack is carried. The structural portion of the frame forms a camber such that a median portion of the structural portion is further away from the back of the user than its upper and lower ends.

1 - 11 . (canceled) 
     
     
         12 . A backpack comprising:
 a pocket demarcated by a dorsal wall opposite the back of a user when the backpack is carried;   a frame partially fixed to the dorsal wall, the frame comprising a structural portion making it possible to shape the dorsal wall;   
       wherein:
 the frame comprises an extension, connected to the structural portion, extending towards the user's back from the structural portion, the extension being designed and arranged so as to define a support section located in an area of the lumbar region of the user when the backpack is carried; and 
 
       wherein:
 the structural portion of the frame forms a camber such that a median portion of the structural portion is further away from the back of the user than an upper end and a lower end of the structural portion, in projection onto a sagittal plane. 
 
     
     
         13 . The backpack according to  claim 12 , wherein:
 the frame is comprised of a shaped cylindrical metal bar.   
     
     
         14 . The backpack according  claim 12 , further comprising:
 an intermediate panel connected to lower and upper portions of the dorsal wall.   
     
     
         15 . The backpack according to  claim 14 , wherein:
 the intermediate panel is stretched between the lower and upper portions of the dorsal wall.   
     
     
         16 . The backpack according to  claim 14 , wherein:
 the frame is inserted between the wall and the intermediate wall.   
     
     
         17 . The backpack according to  claim 12 , further comprising:
 a belt connected to a lower portion of the dorsal wall, the belt comprising an inner wall, configured to be in contact with the user's body when the belt is fastened, and an outer wall, opposite the inner wall; and   
       wherein:
 the extension is designed so that the support section is in contact with the outer wall of the belt in the area of the lumbar zone of the user when the backpack is carried. 
 
     
     
         18 . The backpack according to  claim 17 , further comprising:
 an intermediate panel connected to lower and upper portions of the dorsal wall; and   
       wherein:
 the belt is connected to the intermediate panel. 
 
     
     
         19 . The backpack according to  claim 12 , wherein:
 the support section of the extension extends transversely over at least three centimeters.   
     
     
         20 . The backpack according to  claim 12 , wherein:
 the frame comprises a lower portion forming two open lower loops, arranged vertically in a same area and away from one another transversely, the two lower loops being connected by a lower median portion defining the extension, the lower median portion being arranged so that it is closer to the back of the user than the structural portion of the frame, in projection onto a sagittal plane.   
     
     
         21 . The backpack according to  claim 12 , wherein:
 the frame is removably mounted on the dorsal wall.   
     
     
         22 . The backpack according to  claim 12 , wherein:
 the support section is offset upwards by a distance between 60 and 140 millimeters in relation to a lowermost portion of the frame, in projection onto a sagittal plane.