Packaging box having heat-retaining and cold-retaining functions

Abstract

The packaging box having heat-retaining and cold-retaining functions according to the present invention includes: a box main body including side parts, in which side surfaces are formed by four side walls folded and secured to form a space for storing contents therein, floor parts which respectively extend from the lower portions of the four side walls to form the floor, and lid parts which respectively extend from the upper portions of the four side walls to cover the upper sides of the side parts in openable and closable fashion; and a foamed sheet which protects the contents contained inside the box main body from an external shock and is provided inside the box main body to maintain heat retention and cold retention.

1 . A packaging box having heat-retaining and cold-retaining functions comprising:
 a box main body including side parts, in which side surfaces are formed by four side walls folded and secured to form a space for storing contents therein, floor parts which respectively extend from the lower portions of the four side walls to form the floor, and lid parts which respectively extend from the upper portions of the four side walls to cover the upper sides of the side parts in openable and closable fashion; and   a foamed sheet which protects the contents contained inside the box main body from an external shock and is provided inside the box main body to maintain heat retention and cold retention.   
     
     
         2 . The packaging box according to  claim 1 , wherein the box main body has a waterproofing means formed on the entire surface for waterproofing. 
     
     
         3 . The packaging box according to  claim 2 , wherein the waterproofing means is one selected from laminating coating and CR coating. 
     
     
         4 . The packaging box according to  claim 2 , wherein the waterproofing means is one selected from aluminum foil sheet, a polyethylene-coated sheet, and a coating wax made of a paraffin material. 
     
     
         5 . The packaging box according to  claim 1 , wherein the foamed sheet has the same shape as the box main body, and is formed to be smaller than the box main body to be located inside the box main body. 
     
     
         6 . The packaging box according to  claim 1 , further comprising:
 a bubble wrap interposed between the box main body and the foamed sheet to protect the contents contained inside the foamed sheet from an external shock.   
     
     
         7 . The packaging box according to  claim 1 , further comprising:
 a cold-retaining pack which is selectively stored together with the contents inside the foamed sheet for releasing chilly air in order to maintain cold retention of the contents.   
     
     
         8 . The packaging box according to  claim 1 , wherein the floor part comprises: first floor members respectively extending from two side walls opposed to each other in a trapezoidal shape; and second floor members respectively extending from the other side walls, which are opposed to each other, so as to be partially overlapped with inner and outer surfaces of the first floor members when the side parts are formed in a rectangular shape. 
     
     
         9 . The packaging box according to  claim 1 , wherein the floor part comprises: first floor members respectively extending from two side walls opposed to each other to prevent distortion; a second floor member and a third floor member respectively extending from the other side walls, which are opposed to each other, so as to be joined to each other when being pressed by a predetermined force.