Suitcase with Retractable Handle Assembly

Abstract

A suitcase includes a main body and a retractable handle assembly mounted on the main body. The handle assembly includes two outer pipes and at least two inner pipes retractably mounted in the outer pipes respectively. Each of the inner pipes and the outer pipes of the handle assembly is made of a plastic pipe which is formed by a primary material and an auxiliary material. The primary material and the auxiliary material are initially mixed and fused, and are then extruded and molded to form the plastic pipe of each of the inner pipes and the outer pipes of the handle assembly. The primary material includes polycarbonate (PC) or polyoxymethylene (POM). The auxiliary material includes fiber. The fiber of the auxiliary material includes glass fiber or carbon fiber.

1 . A suitcase, comprising:
 a main body; and   a retractable handle assembly mounted on a back face of the main body;   wherein the handle assembly includes a top seat mounted on the main body, a base mounted on the main body, two outer pipes each mounted between the top seat and the base, at least two inner pipes retractably mounted in the outer pipes respectively, and a handgrip mounted between the inner pipes;   each of the inner pipes and the outer pipes of the handle assembly is made of a plastic pipe which is formed by a primary material and an auxiliary material;   the primary material and the auxiliary material are initially mixed and fused, and are then extruded and molded to form the plastic pipe of each of the inner pipes and the outer pipes of the handle assembly;   the primary material includes polycarbonate (PC); and   the auxiliary material includes fiber.   
     
     
         2 . The suitcase of  claim 1 , wherein the fiber of the auxiliary material includes glass fiber. 
     
     
         3 . The suitcase of  claim 1 , wherein the fiber of the auxiliary material includes carbon fiber. 
     
     
         4 . The suitcase of  claim 1 , wherein at least one of the inner pipes and the outer pipes of the handle assembly has a peripheral wall provided with at least one reinforcement rib. 
     
     
         5 . The suitcase of  claim 1 , wherein at least one of the inner pipes and the outer pipes of the handle assembly has a substantially circular or oblong shape. 
     
     
         6 . A suitcase, comprising:
 a main body; and   a retractable handle assembly mounted on a back face of the main body;   wherein the handle assembly includes a top seat mounted on the main body, a base mounted on the main body, two outer pipes each mounted between the top seat and the base, at least two inner pipes retractably mounted in the outer pipes respectively, and a handgrip mounted between the inner pipes;   each of the inner pipes and the outer pipes of the handle assembly is made of a plastic pipe which is formed by a primary material and an auxiliary material;   the primary material and the auxiliary material are initially mixed and fused, and are then extruded and molded to form the plastic pipe of each of the inner pipes and the outer pipes of the handle assembly;   the primary material includes polyoxymethylene (POM); and   the auxiliary material includes fiber.   
     
     
         7 . The suitcase of  claim 6 , wherein the fiber of the auxiliary material includes glass fiber. 
     
     
         8 . The suitcase of  claim 6 , wherein the fiber of the auxiliary material includes carbon fiber. 
     
     
         9 . The suitcase of  claim 6 , wherein at least one of the inner pipes and the outer pipes of the handle assembly has a peripheral wall provided with at least one reinforcement rib. 
     
     
         10 . The suitcase of  claim 6 , wherein at least one of the inner pipes and the outer pipes of the handle assembly has a substantially circular or oblong shape.