Foldable Supporting Device

A foldable supporting device, comprising:

• a plurality of supporting structures comprising upper parts and lower parts disposed opposite to the upper parts;
• a foldable structure which is connected to the lower parts of the supporting structures and is foldable from an extended position to a folded position;
• a plurality of rotatable elements which connect the supporting structures and the foldable structure;
• wherein when the foldable structure is folded, external forces from the lower parts of the supporting structures are transmitted to the upper parts of the supporting structures with the rotatable elements cooperating to rotate, thereby moving the supporting structures close to each other.

A foldable supporting device, comprising:

• a plurality of supporting structures comprising upper parts and lower parts disposed opposite to the upper parts;
• a foldable structure which is connected to the lower parts of the supporting structures and is foldable from an extended position to a folded position;
• a plurality of rotatable elements which connect the supporting structures and the foldable structure;
• wherein during extension of the foldable supporting device, external forces from the upper parts of the supporting structures are transmitted to the foldable structure with the rotatable elements cooperating to rotate, thereby extending the foldable structure and moving the supporting structures apart from each other.