Luggage case structure

Abstract

A luggage case structure is provided with two aluminum alloy frames which extend in depth to the bottom of the two shells to form the four lateral surfaces of the two shells, which solves the problem of structure strength difference between the bottom of the shells of the convention luggage case and the lateral boards. Besides, the carbon fiber is formed into two-dimensional flat boards instead of a three-dimensional structure, which not only makes manufacturing easier, but also enhances the structural strength while reducing weight.

What is claimed is: 
     
         1 . A luggage case structure being formed by two shells, and each of the shells comprising:
 a frame made of aluminum alloy and including four lateral surfaces connected to one another by four round angles, each of the lateral surfaces including a flat portion, an arc-shaped portion extending from the flat portion, and a flat flange extending from the arc-shaped portion, the four flat portions being connected to one another by the four round angles to define a chamber, and the four flat flanges being connected by the four round angles to define an opening, so that the chamber and the opening are located at two sides of the first frame;   a board made of carbon fibers and including a peripheral edge disposed in the frame to abut against the flat flanges; and   a plurality of fasteners inserted through the flat flanges and a periphery edge of the board to fix the board to the frame.   
     
     
         2 . The luggage case structure as claimed in  claim 1 , wherein the board includes an outer surface and an opposite inner surface, the peripheral edge of the board is provided with an arc-shaped protruding surface which is formed to fit the shape of the arc-shaped portion of the board and located on the outer surface, the outer surface of the board comes into contact with the flat flange of the frame, and the arc-shaped portion of the frame is abutted against the arc-shaped protruding surface of the board. 
     
     
         3 . The luggage case structure as claimed in  claim 1 , wherein the two shells are a first shell and a second shell, the frame and the board which constitute the first shell are referred to a first frame and a first board, and the frame and the board which constitute the second shell are a second frame and a second board;
 the first frame shrinks around the opening to form a connecting portion, and around the connecting portion is an annular groove;   the second frame is provided an annular flange around an inner edge of the opening, and the annular flange includes a terminal edge;   the first and second shells are clamped against each other, in such a manner that the terminal edge of the annular flange of the second frame is disposed in the annular groove of the connecting portion of the first frame.   
     
     
         4 . The luggage case structure as claimed in  claim 3 , wherein the inner edge of the opening of the second frame and the annular flange define an annular engaging groove for insertion of a waterproof rubber piece. 
     
     
         5 . The luggage case structure as claimed in  claim 1 , wherein the flat flange of the frame and the peripheral edge of the board are provided a plurality of holes for insertion of the fasteners. 
     
     
         6 . The luggage case structure as claimed in  claim 1 , wherein a plurality of annular grooves is formed on an inner side of the lateral surfaces of the frame. 
     
     
         7 . The luggage case structure as claimed in  claim 1 , wherein the two shells are a first shell and a second shell, the frame and the board which constitute the first shell are referred to a first frame and a first board, and the frame and the board which constitute the second shell are a second frame and a second board;
 the first frame includes a connecting portion around an inner edge of the opening, and around an outer edge of the connecting portion is formed an annular groove;   an annular flange is disposed around and protrudes out of the peripheral edge of the opening of the second frame, and the terminal edge of the annular flange is formed with a pointed portion and chamfered to form an annular engaging groove;   when the first and second shells are clamped against each other, the pointed portion of the annular flange of the second frame is disposed in the annular groove of the first frame.