| 摘要 |
The Pillbug'' is a transport and cooler container utility that carries cargo in an upright manner. There are three version shapes: a sphere, a sausage and drum, all operating on the same principle. All three versions will be referred to as "spheres." The end-user can open them like a suitcase. The outer shell rolls along the ground while the inner shell rests inside the outer shell. There are ball bearings between the inner and outer shells. Two axles, at both axes, connect the inner and outer shells. The inner shell has a weighted bottom that causes it to stay upright as it is rolling. A seal at the equator makes it watertight. An external horseshoe-shaped harness connects both axis of the Pillbug sphere. A telescoping handle connects to the harness apex so the user can pull it.
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