Luggage case

Abstract

A luggage case includes a box-shaped frame formed of integrally molded polymeric material, and a retractable handle unit. The box-shaped frame includes a bottom portion having a plurality of openings and a surrounding wall portion upward extended from the bottom portion, and all edges of the box-shaped frame between the bottom portion and the surrounding wall portion are rounded edges. At least one of the rounded edges is provided with a recessed rib portion having two insertion holes provided thereon. The retractable handle unit includes two retractable bars that are inserted into the two insertion holes with two upper ends located outside the box-shaped frame to connect to a transverse grip portion, and two lower ends extended into a holding block located inside and connected to the box-shaped frame. Being supported by the box-shaped frame and the retractable handle unit, the luggage case has reduced weight but good structural strength.

1 . A luggage case, comprising:
 a box-shaped frame being an open-topped box integrally molded from a polymeric material, and having a bottom portion and a surrounding wall portion upward extended from a periphery of the bottom portion; all edges of the box-shaped frame between the bottom portion and the surrounding wall portion being rounded edges; at least one of the rounded edges being provided with a recessed rib portion that is sunken from the surrounding wall portion into the box-shaped frame; a pair of insertion holes being provided on one side of the recessed rib portion perpendicular to the bottom portion; and the bottom portion being formed with a plurality of openings;   a retractable handle unit including two retractable bars, a grip portion and a holding block; the retractable bars being inserted into the two insertion holes on the recessed rib portion with two upper ends of the retractable bars located outside the box-shaped frame, the grip portion being transversely extended between the upper ends of the two retractable bars, and the holding block being located inside and connected to the box-shaped frame with lower ends of the two retractable bars extended into and connected to the holding block;   an exterior cover being fixedly covered onto an exterior of the box-shaped frame; and   a lid being hinged to an open top of the box-shaped frame, and being provided with a fastening device, via which the lid is connected to the box-shaped frame to close the open top thereof.   
     
     
         2 . The luggage case as claimed in  claim 1 , wherein the box-shaped frame is formed at bottom corners with a recession each; the recession including a curved surface portion and inward bent wall portions located around the curved surface portion; the inward bent wall portions being formed by inward bending an outer surface of the box-shaped frame at the bottom corner by a predetermined depth; and the curved surface portion being perpendicular to a direction in which an external force is applied thereto. 
     
     
         3 . The luggage case as claimed in  claim 2 , further comprising corner protective caps for covering the recessions on the box-shaped frame; the corner protective caps respectively including three planar portions perpendicular to one another, and the planar portions being so connected to one another that the corner protective caps respectively have an outward smoothly curved shape for fitly attaching to the recessions. 
     
     
         4 . The luggage case as claimed in  claim 3 , wherein the planar portions are respectively provided with a rivet hole, so that the corner protective caps are riveted to the box-shaped frame via the rivet holes. 
     
     
         5 . The luggage case as claimed in  claim 2 , further comprising two wheel assemblies connected to two of the recessions; and each of the wheel assemblies including a wheel holder riveted to the recession and a wheel rotatably connected to the wheel holder. 
     
     
         6 . The luggage case as claimed in  claim 1 , wherein the retractable handle unit further includes a reinforcing plate being configured corresponding to the recessed rib portion for fitly connecting to an outer side of the recessed rib portion; and the reinforcing plate being provided with two through holes corresponding to the two insertion holes on the recessed rib portion for the two retractable bars of the retractable handle unit to extend therethrough.