Patent Publication Number: US-2022232954-A1

Title: Backpack

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This Application is a Divisional of U.S. patent application No. 17/116,375 filed on Dec. 9, 2020, which claims the benefit under 35 U.S.C. § 119(a) to Patent Application No. 10-2020-0008066, filed in the Republic of Korea on Jan. 21, 2020, all of which are hereby expressly incorporated by reference into the present application. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a backpack, and more particularly, to a backpack structure capable of easily and stably fixing an item or the like, which cannot be put into a storage space inside the backpack, to the backpack. 
     Discussion of the Related Art 
     In general, a backpack is used to conveniently store and carry items, and the use and form are diversified according to the needs of consumers. 
     Referring to the structure described in Korean Patent Registration No. 10-1255673, an example of a typical backpack as shown  FIGS. 1 and 2  includes a back plate portion  100  having shoulder straps  110  on both sides, a storage portion  200  that is connected to the back plate portion by sharing one side  120  of a left side or a right side, and includes a space for storing items therein in which the other side except for the one side is separated from the back plate portion, and a connection portion  300  connecting the back plate portion to the storage portion, and formed by using any one selected from a zipper, a fastener, a hook, a button, and a Velcro tape. 
     As described above, the back plate portion  100  and the storage portion  200  are configured to be separable, so that the connection portion  300  is separated when the items are taken out from the backpack worn on a back to allow only the store portion  200  to be freely rotated. Thus, the items can be freely taken out from the storage portion without removing the backpack from the back. 
     However, since the backpack configured as above has a limit in size, some items may not be placed in the storage space of the backpack and may be required to be carried while being hung outside the backpack. In addition, due to the items hung outside the backpack, a time delay and disorder may occur when the items placed in the storage space inside the backpack are taken out. 
     (Patent Document 1) Korean Registered Patent No. 10-1255673 
     SUMMARY OF THE INVENTION 
     The present invention has been proposed to solve the above problems, and the present invention provides a backpack structure that allows items to be simply loaded even when the items to be loaded have a large column shape or “T”-shape, which cannot be put into a storage space of a backpack. 
     The present invention further provides a backpack structure that can be safely worn on the shoulder by maintaining the fit and balance even when a large item is stored in a backpack. 
     The present invention still further provides a backpack structure in which the opening and closing of a storage space of a backpack is not affected even when a large item is stored in the backpack. 
     To solve the above objects, a backpack of the present invention includes: a first backpack member provided on both sides thereof with shoulder straps; a second backpack member configured onto a rear surface of the first backpack member; and an auxiliary loading portion fixed to bottom surfaces of the first backpack member and the second backpack member to have a predetermined width, and further includes a buckle for coupling both sides of the first backpack member and the second backpack member to each other, wherein at least a lower portion of the auxiliary loading portion is always exposed outward from the first backpack member and the second backpack member, a width of the auxiliary loading portion is compactly reduced and fixed by pulling both ends of twines inserted into twine guide paths formed at both edges of the auxiliary loading portion, or the first backpack member and the second backpack member are unfolded in opposite directions even while the auxiliary loading portion is fixed to have a predetermined width by pulling the both ends of the twines inserted into the twine guide paths, and the center of gravity of the backpack is prevented from being changed when the item is loaded on the auxiliary loading portion fixed to have the predetermined width by the twines. 
     In addition, the backpack of the present invention includes a first backpack member provided on both sides thereof with shoulder straps; a second backpack member configured onto a rear surface of the first backpack member; an auxiliary loading portion configured to fix the bottom surfaces of the first backpack member and the second backpack member to each other to enable the first backpack member and the second backpack member to be unfolded in opposite directions, and configured to be exposed outward from the first backpack member and the second backpack member; and a buckle for coupling at least both side portions of the first backpack member and the second backpack member to each other, wherein the auxiliary loading portion is formed by coupling a plurality of panels to each other by a first hinge, in which one of the panels coupled by the first hinge is rotatably fixed to the first backpack member via a second hinge, and an opposite one of the panels coupled by the first hinge is rotatably fixed to the second backpack member via a third hinge. 
     In addition the first backpack member may serve as a backrest, and the second backpack member may include a storage portion. 
     In addition the first backpack member and the second backpack member may include storage portions, respectively. 
     Advantageous Effects 
     The backpack of the present invention a first backpack member provided on both sides thereof with shoulder straps; a second backpack member configured onto a rear surface of the first backpack member; an auxiliary loading portion configured to fix the bottom surfaces of the first backpack member and the second backpack member to each other to enable the first backpack member and the second backpack member to be unfolded in opposite directions, and configured to be exposed outward from the first backpack member and the second backpack member, and a buckle for coupling both sides of the first backpack member and the second backpack member to each other, wherein the auxiliary loading portion may include a spacing adjusting device capable of adjusting a spacing according to the item loaded between the first backpack member and the second backpack member, so that a large item that does not fit into the storage portion of the backpack can be simply loaded in the backpack. 
     In addition, the storage portion of the backpack may be easily opened and closed even when the large item is loaded in the backpack, so that the large item can be prevented from interfering with removing/placing other items from/to the storage portion of the backpack. 
     In addition even when the large item is loaded in the backpack, the balance for the center of gravity of the backpack can be maintained. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a three-dimensional view showing a state in which a back plate portion and a storage portion of a conventional backpack are separated from each other. 
         FIG. 2  is a three-dimensional view showing a state in which the back plate portion and the storage portion of the conventional backpack are coupled to each other. 
         FIG. 3  is a three-dimensional view showing an example of a backpack in which a first backpack member and a second backpack member are combined to each other according to the present invention. 
         FIG. 4  is a three-dimensional view showing a state in which the first backpack member and the second backpack member of  FIG. 3  are unfolded. 
         FIG. 5  is a view for explaining a distance adjustment of an auxiliary loading portion of the present invention. 
         FIG. 6  is a view for explaining another example of the auxiliary loading portion of the present invention. 
         FIGS. 7 and 8  are three-dimensional views showing a state in which large-sized items are loaded in the backpack of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Hereinafter, the technical configuration and the function of a backpack of the present invention will be described in detail with reference to  FIGS. 3 to 8 . 
     As shown  FIGS. 3 and 4 , a backpack  500  of the present invention includes a first backpack member  510 , a second backpack member  520 , a pair of shoulder straps  530  provided in the first backpack member, and an auxiliary loading portion  540  connecting and fixing bottom surfaces of the first backpack member and the second backpack member to each other. 
     The first backpack member  510  includes a storage portion  512  opened by a zipper  511  or the like. The second backpack member  520  configured onto a rear surface of the first backpack member  510  also includes a storage portion  522  opened by a zipper  521  or the like. 
     The first backpack member  510  and the second backpack member  520  are not necessarily limited as having the storage portions  512  and  522 , respectively. The storage unit  512  may be omitted in the first backpack member  510 . 
     In the case of omitting the configuration of the storage portion  512  in the first backpack member  510 , the first backpack member  510  may be configured as a structure that can substantially serve as a backrest only. 
     In particular, the auxiliary loading portion  540  is configured to fix the bottom surfaces of the first backpack member  510  and the second backpack member  520  to each other, so that the first backpack member and the second backpack member are unfolded in opposite directions, and configured to be exposed outward from the first backpack member  510  and the second backpack member  520 . As shown in  FIG. 4  as an example, the auxiliary loading portion  540  may be formed to fix the bottom surfaces of the first backpack member  510  and the second backpack member  520  to each other by using a rectangular flexible member (such as leather, felt, and cloth), and twine guide paths  541   a  and  542   a  through which twines  541  and  541  are inserted may be formed at both edges of the auxiliary loading portion  540 , respectively. 
     In addition a plurality of buckles  550  adjustable in length may be fixed on peripheries of the first backpack member  510  and the second backpack member  520 , so that the first backpack member  510  and the second backpack member  520  may be coupled to each other. 
     As shown in  FIG. 5 , when the auxiliary loading portion  540  is used, the first backpack member  510  and the second backpack member  520  are unfolded to both sides, the twine  541   a  and  542   a  are loosened to secure a sufficient width of the auxiliary loading portion  540 , a large item is loaded thereon, the first backpack member  510  and the second backpack member  520  are erected to initial positions, and the first backpack member  510  and the second backpack member  520  are firmly fixed by the buckles  550 . On the other hand, when the auxiliary loading portion  540  is not used, the twines  541   a  and  542   a  are pulled to compactly shrink the auxiliary loading portion  540 , so as to prevent a gap between the first backpack member  510  and the second backpack member  520  from opening, and prevent the auxiliary loading portion  540  from being excessively exposed outward from the first backpack member  510  and the second backpack member  520 . 
     According to the backpack  500  of the present invention configured in the above manner, as shown  FIGS. 6 and 7 , a large item  600  that does not fit into the storage portion of the backpack can be simply loaded and fixed to the auxiliary loading portion  540  positioned between the first backpack member  510  and the second backpack member  520 . 
     The large-sized item  600  can be easily loaded regardless of a shape such as “I”-type or “T”-type, and the center of gravity of the backpack does not change even when the item is loaded. 
     The auxiliary loading portion of the present invention is not limited to the structure of  FIGS. 4 and 5 , and may be configured to have a folding type as shown in  FIG. 8 . 
     When the auxiliary loading portion  640  is configured in the folding type, two panels  641  and  641  are coupled to each other by a hinge  641   b,  in which one of the panels is rotatably fixed to the first backpack member  510  via a hinge  641   a,  and the other one of the panels is rotatably fixed to the second backpack member  520  via a hinge  641   c.    
     When the auxiliary loading portion  640  is not used, the panels  641  and  641  are folded to compactly reduce a distance thereof, so that the gap between the first backpack member  510  and the second backpack member  520  may be prevented from being widened. On the contrary, when the auxiliary loading portion  640  is in use, the panels  641  and  641  are unfolded to widen the gap, so that the item  600  having a large size may be loaded thereon. 
     Although  FIG. 8  illustrates a structure in which only one pair of panels are configured to constitute the auxiliary loading portion  640 , at least three panels may be hinged so as to adjust the width as necessary. In other words, necessary panels among a plurality of panels may be unfolded as needed, and the remaining panels may be stacked upright. 
     The backpack  500  of the present invention as described above is not limited to the description and configuration of the drawings illustrated above, and various modifications may be made within the scope of the claims and the purposes of the present invention. 
     The present invention relates to a backpack that may easily load an item having a large size.