Extendable frame and structure having same

A supporting frame, comprising:

• a mounting assembly comprising a first mounting unit and a second mounting unit pivotally connected to each other at proximal sides thereof, thereby allowing the first and second mounting units to rotate relative to each other between a folded position and an unfolded position, wherein:
• each of the first and second mounting units comprises a first mounting member and a second mounting member spaced apart from each other in a first direction;
• for at least one mounting unit in the first and second mounting units, each of the first and second mounting members comprises:
• a first elongated member;
• a second elongated member telescopically coupled with the first elongated member to adjust a length of the first or second mounting member in a second direction, thereby allowing the mounting assembly to extend or contract in the second direction;
• a first engaging member disposed at the first elongated member and configured to guide telescopic movement of the second elongated member relative to the first elongated member;
• and
• a second engaging member disposed at the second elongated member and configured to engage with the first engaging member to prevent the first or second mounting member from extending beyond a defined maximal allowable length of the first or second mounting member.

A supporting structure, comprising:

• a mounting assembly comprising a first mounting unit and a second mounting unit, wherein:
• each of the first and second mounting units comprises a first longitudinal mounting member and a second longitudinal mounting member spaced apart from each other in a first direction;
• each of the first and second longitudinal mounting members of the first and second mounting units has a length that is adjustable in a second direction, thereby allowing the mounting assembly to extend or contract in the second direction;
• and
• the first longitudinal mounting members of the first and second mounting units are pivotally coupled with each other at proximal end portions thereof and the second longitudinal mounting members of the first and second mounting units are pivotally coupled with each other at proximal end portions thereof, thereby allowing the first and second mounting units to rotate relative to each other between a folded position and an unfolded position;
• a plurality of leg assemblies, each connected to the mounting assembly and rotatable relative to the first and second longitudinal mounting members of the first or second mounting unit;
• a first panel coupled with the first mounting unit;
• and
• a second panel coupled with the second mounting unit,
• wherein the supporting structure is extendable and foldable, and when folded, the mounting assembly and the plurality of leg assemblies are disposed between the first and second panels.