Packing box

Abstract

The invention relates to the trapezium packing box made of the cardboard, which comprises a rectangular upper board, a rectangular bottom board, two relative rectangular side boards and two relative trapezium side boards; said upper board, said bottom board and said four side boards are connected together by respective tongues and engaging grooves and enclose the chamber therein. The present invention improves the space using rate and fits for packing non-quadrate goods such as irons.

1 . A packing box made of the cardboard, wherein said box form is a trapezium, and comprises a rectangular upper board, a rectangular bottom board, a first rectangular sideboard, a second rectangular side boards, a first trapezium side board and a second trapezium side board; said upper board, said bottom board and said four side boards are connected together by respective tongues and engaging grooves and enclose chamber therein. 
   
   
       2 . The packing box according to  claim 1 , wherein said first and second trapezium side boards are the isosceles trapezoid or the right-angle trapezoid. 
   
   
       3 . The packing box according to  claims 1 , wherein said upper board, said first rectangular side board, said bottom board and said second rectangular side board are connected with each other in turn by their creases; said first and second trapezium side board extend from the left and the right side of said first rectangular side board; said first trapezium side board and said second trapezium side board are connected to said first rectangular side board by their creases. 
   
   
       4 . The packing box according to  claim 1 , wherein said second rectangular side board comprises a left side board and a right side board extending from its left and right side; said left side board and said right side board are connected to said second rectangular side board by creases. 
   
   
       5 . The packing box according to  claim 1 , wherein said upper board comprises a first tongue and a first engaging groove; said second rectangular side board comprises a second tongue and a second engaging groove matched with the first tongue and the first engaging groove of said upper board; said first trapezium side board comprises a third tongue and a third engaging groove; the left side of said second rectangular side board comprises a fourth tongue and a fourth engaging groove matched with the third tongue and the third engaging groove of said first trapezium side board; said second trapezium side board comprises a fifth tongue and a fifth engaging groove; the right side of said second rectangular side board comprises a sixth tongue and a sixth engaging groove matched with the fifth tongue and the fifth engaging groove of said second trapezium side board. 
   
   
       6 . The packing box according to  claim 4 , said left side board and said right side board have the same figures with said first trapezium side board and said second trapezium side board respectively. 
   
   
       7 . The packing box according to  claims 1 , wherein said first trapezium side board comprises a first shield board and said second trapezium side board comprises a second shield board; said first shield board is connected to said first trapezium side board by crease and said second shield board is connected to said second trapezium side board by creases. 
   
   
       8 . The packing box according to  claims 1 , wherein said bottom board comprises a left wing board and a right wing board extending from its left side and its right side, wherein said left wing board and said right wing board are connected to said bottom board by creases. 
   
   
       9 . The packing box according to  claims 1 , wherein the length of the upper side of said trapezium side boards is 60-120 mm, and the length of the bottom side of said trapezium side boards is 130-180 mm and the distance between said upper side and said bottom side is 120-180 mm; the vertical distance between said two trapezium side boards is 200-400 mm. 
   
   
       10 . The packing box according to  claim 9 , wherein the length ratio of said upper side to said bottom side is 19:30. 
   
   
       11 . The packing box according to  claim 10 , wherein the included angle between the inclined side of said trapezium side board and said bottom side is 65°-74°. 
   
   
       12 . The packing box according to  claims 1 , wherein the length of the upper side of said trapezium side boards is 200-300 mm, the length of the bottom side of said trapezium side boards is 250-350 mm and the distance between said upper side and said bottom side is 120-180 mm; the vertical distance between said two trapezium side boards is 100-160 mm.