| 摘要 |
A hand cart has a frame having a left vertical member and right vertical member, each vertical member having a top end that is coupled to a handle bar, and a bottom end that has a pin extending therefrom. The hand cart also includes a left wheel assembly and a right wheel assembly, each wheel assembly having a tubular housing that receives a portion of a vertical member, and a wheel secured to the tubular housing, with each tubular housing having a spiral slot that receives the pin of the corresponding bottom end for movement within the slot. A carrier plate has a left seat and a right seat, each seat pivotably connected to a corresponding bottom end of a vertical member.
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