| 摘要 |
An internal frame for supporting a wheeled suitcase comprises a base, a U-shaped frame mounted on top of the base and a modular central frame comprising an L-shaped head set having an L-shaped brace and all extension board connected to the front end of the L-shaped brace, two rectangular tubes slidably connected to the lower end of the L-shaped brace, and two sockets connected to the lower ends of the two rectangular tubes. The upper end of the central frame is mounted to the top panel of the U-shaped frame and the lower end of the central frame is mounted to the rear end of the base so that the structure of the internal frame is greatly strengthened by the central frame. The modular central frame design not only can strengthen the structure of a wheeled suitcase, but is also flexible for change.
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