| 摘要 |
A collapsible supporting structure has a mounting body, arms extending upwardly from the mounting body and front and rear wheeled support legs. At least some of the front and rear legs and arms are pivotally mounted to the mounting body to enable pivoting about the mounting body about respective transverse axes between an operative configuration and a collapsed configuration. In the collapsed configuration, the front and rear legs and arms extend substantially coextensively. The arms have an extended configuration for use and also a retracted configuration which results in a reduction of the overall length of the arms. In the retracted configuration, the length of the arms approximates that of either of the front or rear legs.
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