Package box

Abstract

A package box includes a four-sided outer panel having a plurality of parallel panel fold lines and a connection region that is disposed between two adjacent ones of the panel fold lines, and a retainer made from a foldable panel and connected to the connection region. The retainer has two spaced-apart retainer walls, each of which has a bottom panel part connected to the connection region, a top panel part above the bottom panel part, and first and second side panel parts that interconnect the bottom and top panel parts. Each of the retainer walls is convertible between an erect used position, and a collapsed non-used position. The outer panel is folded along the panel fold lines to extend around the retainer.

What is claimed is: 
     
         1 . A package box comprising:
 a four-sided outer panel having a plurality of parallel panel fold lines, and an outer connection region that is disposed between two adjacent ones of said panel fold lines; and   a retainer made from a foldable panel and connected to said outer connection region of said outer panel, said retainer having two spaced-apart retainer walls, each of which has a bottom panel part connected to said outer connection region, a top panel part above said bottom panel part, and first and second side panel parts that interconnect said bottom and top panel parts, each of said retainer walls being convertible between a used position, where said top and bottom panel parts are spaced apart from each other, and where said first and second side panel parts extend substantially perpendicularly to said outer connection region to thereby cooperate with said top and bottom panel parts to form a rectangular hollow wall structure, and a non-used position, where said rectangular hollow wall structure lays flat on said outer connection region, collapses at two first corner portions of said rectangular hollow wall structure that are diagonally opposite to each other, and becomes flat at two second corner portions of said rectangular hollow wall structure that are diagonally opposite to each other, said second side panel parts of said retainer walls being disposed between said first side panel parts of said retainer walls when said retainer walls are at the used position, said outer panel being folded along said panel fold lines to extend around said retainer.   
     
     
         2 . The package box as claimed in  claim 1 , wherein said foldable panel of said retainer has, in each of said retainer walls:
 first panel grooves that are respectively formed between said top panel part and said first side panel part, between said top panel part and said second side panel part, between said bottom panel part and said first side panel part, and between said bottom panel part and said second side panel part, and that enable said foldable panel to fold and form said first and second corner portions when said retainer wall is at the used position; and   two second panel grooves that are respectively proximal and parallel to two of said first panel grooves which form respectively said first corner portions, and that enable said rectangular hollow wall structure to collapse at said first corner portions when said retainer wall is at the non-used position, said foldable panel being folded along said second panel grooves and said two of said first panel grooves when said retainer wall is at the non-used position.   
     
     
         3 . The package box as claimed in  claim 2 , wherein said retainer further has an intermediate panel portion that is connected between said retainer walls and that is connected to said outer connection region of said outer panel. 
     
     
         4 . The package box as claimed in  claim 3 , wherein said retainer is a single panel. 
     
     
         5 . The package box as claimed in  claim 3 , wherein said bottom panel part of each of said retainer walls has a lower panel layer connected between said intermediate panel portion and said first side panel part, and an upper panel layer disposed over said lower panel layer and connected to said second side panel part, one of said two second panel grooves being disposed in said first side panel part in proximity to said bottom panel part, the other one of said two second panel grooves being disposed in said second side panel part in proximity to said top panel part, said retainer walls extending toward each other at the non-used position. 
     
     
         6 . The package box as claimed in  claim 5 , wherein said second side panel parts of said retainer walls are respectively formed with through holes that are aligned with each other and that are adapted for insertion of two ends of a bottle to retain the bottle therebetween. 
     
     
         7 . The package box as claimed in  claim 5 , wherein:
 said second side panel part of each of said retainer walls has a retainer wall notch formed in an edge thereof, said retainer wall notches of said retainer walls being aligned with each other when said retainer walls are at the used position;   said panel fold lines of said outer panel extend in an extending direction; and   said outer panel further has a main portion having said outer connection region and said panel fold lines, and two flank portions projecting respectively from opposite ends of said main portion in a transverse direction that is transverse to the extending direction and disposed respectively at opposite sides of said outer connection region, each of said flank portions having two opposite ends that are respectively indented from two opposite ends of the respective one of said two opposite sides of said main portion in the extending direction, each of said flank portions further having a flank edge that is distal from said main portion in the transverse direction, and two flank notches that are indented from said flank edge toward said main portion, said flank notches of each of said flank portions being respectively interlocked with said retainer wall notches of said second side panel parts of said retainer walls when said retainer walls are at the used position and when said outer panel is folded around said retainer walls along said panel fold lines to place said flank portions in face-to-face abutment with each other in proximity to said one edge of said second side panel part of each of said retainer walls and to form said main portion into a surrounding wall that extends around said retainer walls.   
     
     
         8 . The package box as claimed in  claim 3 , wherein;
 said retainer further has two connection walls that are respectively connected to two opposite sides of said intermediate panel portion between said retainer walls and that are convertible between a used position and a non-used position, said connection walls cooperating with said retainer walls to form a four-sided surrounding wall structure when said retainer walls and said connection walls are in the used position, said connection walls being laid flat on said outer panel when being at the non-used position, each of said connection walls having an outer panel part that is connected to said intermediate panel portion, an inner panel part, and an upper panel part that is connected between said outer and inner panel parts above said intermediate panel portion, said foldable panel of said retainer further having, for each of said connection walls, retainer fold lines that are respectively disposed between said outer panel part and said intermediate panel portion, between said upper panel part and said outer panel part, and between said upper panel part and said inner panel part;   when each of said connection walls is at the non-used position, said outer panel part and said upper panel part are laid flat on said inner panel part and said intermediate panel portion; and   when each of said connection walls is at the used position, said inner and outer panel parts are spaced apart from each other and extend perpendicularly to said intermediate panel portion, and said upper panel part is spaced apart from said intermediate panel portion.   
     
     
         9 . The package box as claimed in  claim 8 , wherein:
 said inner panel part of each of said connection walls has two opposite connection edges respectively proximal to said retainer walls when said connection walls are at the used position, and two first connection notches respectively indented from said connection edges and flush with said top panel parts of said retainer walls when said connection wall and said retainer walls are at the used position; and   each of said retainer walls further has two openings, each of which extends from said top panel part to said second side panel part and is aligned with one of said connection edges of said inner panel part of one of said connection walls when said retainer wall and said connection walls are at the used position, said top panel part of each of said retainer sails interlocking with one of said connection edges of said inner panel part of each of said connection walls through an inter-engagement of one of said openings and one of said first connection notches.   
     
     
         10 . The package box as claimed in  claim 8 , wherein said first side panel part of each of said retainer walls has an outer panel layer connected between said intermediate panel portion and said top panel part, and an inner panel layer connected to said bottom panel part and extending over an inner surface of said outer panel layer, one of said two second panel grooves being formed in said top panel part in proximity to said second side panel part, the other one of said two second panel grooves being formed in said bottom panel part in proximity to said first side panel part, said retainer walls extending away from each other at the non-used position. 
     
     
         11 . The package box as claimed in  claim 9 , wherein:
 said inner panel part of each of said connection walls further has a second connection notch indented from one of said connection edges at a level higher than said top panel parts of said retainer walls when said connection wall and said retainer walls are at the used position;   said panel fold lines of said outer panel extends in an extending direction;   said outer panel further has a main portion having said outer connection region and said panel fold lines, and two flank portions projecting respectively from opposite sides of said main portion in a transverse direction that is transverse to the extending direction and disposed respectively at opposite sides of said outer connection region, each of said flank portions having two opposite ends that are respectively indented from two opposite ends of the respective one of said two opposite sides of said main portion in the transverse direction, each of said flank portions further having a flank edge that is distal from said main portion in the transverse direction, and two flank notches that are indented from said flank edge toward said main portion, said flank notches of each of said flank portions being respectively aligned with said second connection notches of said inner panel parts of said connection walls when said connection walls and said retainer walls are at the used position; and   when said connection and retainer walls are at the used position and when said outer panel is folded along said panel fold lines to extend around said connection walls, said flank notches of each of said flank portions respectively interlock with said second connection notches of said connection edges of said inner panel parts, said flank portions are in face-to-face abutment with each other, and said main portion forms a surrounding wall to surround said connection and retainer walls.   
     
     
         12 . The package box as claimed in  claim 2 , wherein a distance between each of said second panel grooves and an immediately adjacent one of said first panel grooves is at least twice a thickness of said foldable panel.