US 2011/0079479 A1Published application

Enhanced structure for base with roller and belt of hardshell zipper case

OwnerSheng Cho Yanginventor

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Abstract

An enhanced structure for the base with roller and belt of hardshell zipper case is provided, including a hardshell zipper case main body, a plurality of hidden roller units, a retractable belt unit, and an auxiliary wheel set. The hidden roller units and the retractable belt unit are placed inside the roller housing trench and the belt housing trench located at the bottom of the hardshell zipper case main body. When the hidden roller units are not in use, the roller units are entirely hidden inside the roller housing trench so that the roller unit will not be damaged due to careless handling. To move the hardshell zipper case, the outer rim of the roller units are exposed outside of the surface of the roller housing trench so that the roller units can roll along when moved. The belt of retractable belt unit can be easily pulled out from one end of the bottom of the hardshell zipper case. After surrounding the hardshell zipper case main body with the belt, the belt can be fastened to the other end of the retractable belt unit. In this manner, the belt can be easily pulled out for fastening the case when necessary, and can be retracted when not in use.

Claims10

Dependent claims

An enhanced structure for base with roller and belt of hardshell zipper case, comprising:

a hardshell zipper case main body, designed as a monolithic piece, further comprising a plurality of roller housing trenches, a belt housing trench and at least an auxiliary wheel trench, said roller housing trenches and said belt housing trench being located respectively at a main body bottom of said hardshell zipper case main body, an auxiliary wheel set being placed inside said auxiliary wheel trench, located at said main body bottom, outer rim of said auxiliary wheel set being convex above surface of back of main body;
a plurality of hidden roller units, fastened to inside of said roller housing trenches, said auxiliary wheel set placed inside auxiliary wheel trench being located between said hidden roller units and said main body back, each said hidden roller unit having a roller exposed above surface of said main body bottom when moving, and hidden below surface of said main body bottom when parking;
a retractable belt unit, fastened to inside of said belt housing trench;
a hardshell lid;
and
an expanding unit, said expanding unit being connected between said hardshell zipper case main body and said hardshell lid, further comprising an expanding zipper and an expanding part.

3 more elements

Dependencies are inferred from the claim text.