| 摘要 |
The present invention relates to a supporting structure, includes a retractable connecting unit, a bottom pivotal shaft device, a top pivotal shaft device and at least one linking device. The retractable connecting unit is that a slide engaging sheet is provided on top of a fixed engaging sheet, and an adjusting member is provided between the fixed and the slide engaging sheets, a bottom end and a top end are respectively provided at the bottom portion and the top portion of the retractable connecting unit. The linking device is that a bottom shaft wheel and a top shaft wheel are respectively provided between the bottom end and the top end of the lateral side of the connecting unit and between bottom supporting racks of the bottom pivotal shaft device and top supporting racks of the top pivotal shaft device, and respectively and pivotally connecting to the bottom pivotal shaft device and the top pivotal shaft device, and a flexible band is provided between the top and the bottom shaft wheels; by adjusting the adjusting member, the slide engaging sheet can move alongside the fixed engaging sheet, so the lengths of the retractable connecting unit and the top and the bottom shaft wheels disposed at the lateral side of the retractable connecting unit are changed, and a proper tension is maintained by the flexible band.
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