Backpack with suspension

Abstract

The invention relates to a backpack ( 1 ) comprising a bag ( 2 ), a frame ( 3 a, 3 b, 5 ) secured to the rear face ( 7 ) of the bag so as to form a dorsal plane ( 9 ) having a pair of straps ( 11 a, 11 b ) slidably mounted thereon, and a belt assembly ( 13 ) having a bottom portion ( 15 ) arranged to be held around the waist. Link means ( 17, 19 ) are arranged between the belt assembly ( 13 ) and the pair of straps ( 11 a, 11 b ), together forming a dorsal holder element ( 21 ) arranged to enable the belt assembly to be slidably mounted relative to the dorsal plane. Suspension support means ( 23 ) are arranged between the bottom portion ( 15 ) of the belt assembly and the bottom portion ( 25 ) of the dorsal plane in order to retain the bag by keeping the dorsal plane pressed against the back and by damping movements of the bag relative to the dorsal holder element.

1 . A backpack comprising:
 a bag:   a frame secured to the rear face of the bag so as to form a dorsal plane adjacent to the back of the user of the backpack, the dorsal plane having a pair of straps mounted thereon to slide vertically;   a belt assembly having at least a bottom portion arranged to be held securely around the waist of a user; and   a link arranged between the belt assembly and the pair of straps ( 11   a,    11   b ),   wherein the resulting arrangement forms a dorsal holder element arranged to enable the belt assembly to be mounted to slide vertically relative to the dorsal plane, and wherein suspension supports are arranged at least between the bottom portion of the belt assembly and the bottom portion of the dorsal plane to retain the bag by keeping the dorsal plane pressed against the back and by damping relative movements of the bag relative to the dorsal holder element.   
     
     
         2 . A backpack according to  claim 1 , wherein the frame further comprises two lateral rigid blades arranged vertically at least in the top portion of the rear face of the bag, with the two straps being slidably mounted thereon. 
     
     
         3 . A backpack according to  claim 2 , wherein the frame further comprises a horizontal rigid blade arranged horizontally in the bottom portion of the rear face of the bag. 
     
     
         4 . A backpack according to  claim 3 , wherein the rigid blades are incorporated in the rear face of the bag. 
     
     
         5 . A backpack according to  claim 1  wherein the bottom portion of the belt assembly comprises a waist belt proper, and the suspension supports comprise a resilient member comprising at least one elastic strip, distributed uniformly relative to the belt, the top end of the elastic strip being fastened to the belt and the bottom end of the elastic strip being fastened to the dorsal plane. 
     
     
         6 . A backpack according to  claim 5 , wherein the frame further comprises a horizontal rigid blade arranged horizontally in the bottom portion of the rear face of the bag and the bottom end of the elastic strip is fastened to the horizontal rigid blade. 
     
     
         7 . A backpack according to  claim 1  wherein the suspension supports comprise a resilient member comprising an elastic strip, the resilient member being uniformly distributed relative to the belt assembly, one of the ends of the elastic strip being fastened to the dorsal holder element, in particular at its half-height, and the other of the ends being fastened to the dorsal plane in particular in the top portion thereof, the elastic strip passing around a deflector element situated in the bottom portion of the dorsal plane. 
     
     
         8 . A backpack according to  claim 7 , wherein the frame further comprises a horizontal rigid blade arranged horizontally in the bottom portion of the rear face of the bag and the deflector element is arranged at the horizontal rigid blade. 
     
     
         9 . A backpack according to  claim 5  wherein the belt assembly is constituted solely by the belt, and in that the link arranged between the belt assembly and the pair of straps are comprises a rigid strip having its top end connected to the pair of straps and its bottom end connected to the belt together forming a unit assembly. 
     
     
         10 . A backpack according to  claim 9 , wherein the suspension supports comprise two elastic strips distributed on either side of the rigid strip, the top ends of the elastic strips being connected to the pair of straps and the bottom ends of the elastic strips being connected to the dorsal plane. 
     
     
         11 . A backpack according to  claim 5  wherein the belt assembly is constituted solely by the waist belt, and the link arranged between the belt assembly and the pair of straps ( 11   a,    11   b ) comprises a flexible web connected beside its top end to the pair of straps and beside its bottom end to the belt. 
     
     
         12 . A backpack according to  claim 11 , wherein the bottom end of the web is fastened to the belt and the top end of said web is fastened to the dorsal plane, the pair of straps having an assembly with the web, the assembly being arranged to lock the pair of straps in position at any point along said web. 
     
     
         13 . A backpack according to  claim 12 , wherein the assembly comprises an adjustment buckle through which the web passes. 
     
     
         14 . A backpack according to  claim 5  wherein the belt assembly comprises the waist belt and a rigid part having its bottom end mounted to pivot relative to the belt and having top side ends mounted to slide relative to the vertical rigid blades, and in that the link is arranged between the rigid part ( 43 ) and the pair of straps. 
     
     
         15 . A backpack according to  claim 14 , wherein the link comprises an adjustment arranged to adjust the length between the rigid part and the pair of straps. 
     
     
         16 . A backpack according to  claim 15 , wherein the adjustment comprises a web provided with a length adjustment, the top end thereof being connected to the pair of straps and the bottom end being connected to the rigid part. 
     
     
         17 . A backpack according to  claim 14 , wherein the rigid part is triangular in shape with the base of the triangle being disposed at the top and presenting said two top side ends, and with the vertex thereof being disposed at the bottom and forming the bottom end. 
     
     
         18 . A backpack according to  claim 17 , wherein the vertex is pivotally mounted at the bottom portion of the belt, with the base being disposed above the top end of said belt. 
     
     
         19 . A backpack according to  claim 14  wherein an additional resilient link comprising two elastic strips is arranged as a shock absorber, the strips having their bottom ends secured to the top portions of the two straps and having their top ends secured to the dorsal plane. 
     
     
         20 . A backpack according to  claim 1  wherein the frame comprises a cross structure arranged to exert pressure on the rear face of the bag and to maintain the rear face spaced a little apart from the user's back. 
     
     
         21 . A backpack according to  claim 20 , wherein the cross structure is disposed on the rear face on the inside of the bag. 
     
     
         22 . A backpack according to  claim 1 , further comprising a locking system arranged between the dorsal holder element and the dorsal plane to neutralize the suspension supports.