Carton

Abstract

A carton made of a paper material having a protective layer formed on a surface thereof. The carton has a box and a lid being swingable relative to the box. The lid has a first front sheet and a second front sheet being foldable relatively and two first side sheets and two second side sheets being foldable relatively. The lid has a double-layered structure to improve its structural strength, and an interior side of the lid is also protected by the protective layer. The carton of the present invention has enhanced structural strength and better damp-proofing effect to preserve objects contained therein.

What is claimed is: 
     
         1 . A carton made of a paper material having a protective layer on a surface thereof, the carton comprising:
 a box forming a containing space therein; and   a lid having
 a first front sheet; 
 a first top sheet foldably connected between the box and the first front sheet such that the lid is swingable relative to the box; 
 a second front sheet foldably connected to the first front sheet such that the first front sheet is located between the first top sheet and the second front sheet; 
 a second top sheet foldably connected to the second front sheet such that the second front sheet is located between the first front sheet and the second top sheet; 
 two first side sheets, each one of the two first side sheets foldably connected to a respective one of two opposite sides of the first top sheet; 
 two second side sheets, each one of the two second side sheets foldably connected to a respective one of the two first side sheets such that each one of the two first side sheets is located between the first top sheet and said second side sheet connected thereto; 
 two wing sheets, each one of the two wing sheets foldably connected to a respective one of the two second side sheets such that each one of the two second side sheets is located between said first side sheet and said wing sheet connected thereto; 
 at least one first engaging component having two engaging openings, each one of the two engaging openings formed between a respective one of the two wing sheets and said second side sheet connected thereto; and 
 at least one second engaging component having
 two engaging protrusions respectively protruding from two opposite sides of the second top sheet along two opposite directions and respectively inserted into the two engaging openings of said first engaging component. 
 
   
     
     
         2 . The carton as claimed in  claim 1 , wherein the box has
 a bottom sheet;   two first box side sheets, each one of the two first box side sheets foldably connected to a respective one of two opposite sides of the bottom sheet; and   two second box side sheets, each one of the two second box side sheets connected to an edge of a respective one of the two first box side sheets such that each one of the two first box side sheets is located between the bottom sheet and said second box side sheet connected thereto.   
     
     
         3 . The carton as claimed in  claim 2 , wherein
 the box has two receiving openings, a front box sheet, and two inserting sheets;   the front box sheet is foldably connected to the bottom sheet;   each one of the two receiving openings is formed between a respective one of the first box side sheet and said second box side sheet connected thereto;   each one of the two inserting sheets is foldably connected to a respective one of two opposite sides of the front box sheet and is configured to be inserted into a respective one of the two receiving openings.   
     
     
         4 . The carton as claimed in  claim 3 , wherein the box has
 two through holes formed through the bottom sheet and respectively located near the two first box side sheets; and   two protrusions respectively protruding from the two second box side sheets and configured to be respectively inserted into the two through holes.   
     
     
         5 . The carton as claimed in  claim 1 , wherein each one of the two second side sheets has an engaging sheet configured to be located between the  9  first front sheet and the second front sheet. 
     
     
         6 . The carton as claimed in  claim 2 , wherein each one of the two second side sheets has an engaging sheet configured to be located between the first front sheet and the second front sheet. 
     
     
         7 . The carton as claimed in  claim 3 , wherein each one of the two second side sheets has an engaging sheet configured to be located between the first front sheet and the second front sheet. 
     
     
         8 . The carton as claimed in  claim 4 , wherein each one of the two second side sheets has an engaging sheet configured to be located between the first front sheet and the second front sheet.