Stable and convenient foldable frame and table

A foldable structure comprising:

• a shaft elongated in a first direction;
• a first mounting assembly having a proximal side fixedly connected to the shaft to restrict rotation of the first mounting assembly relative to the shaft;
• a second mounting assembly having a proximal side rotatably connected to the shaft to allow rotation of the second mounting assembly relative to the shaft;
• a first panel fixedly connected to the first mounting assembly;
• a second panel fixedly connected to the second mounting assembly;
• a first connector disposed at the shaft and fixedly connected to the first panel, wherein the first connector comprises a first surface that (i) remains in direct contact with a proximal side of the first panel whether the foldable structure is folded or unfolded, and (ii) when the foldable structure is unfolded, is in direct contact with a proximal side of the second panel and abuts upwardly against the proximal sides of the first and second panels, thereby helping to level the first and second panels;
• and
• a second connector disposed at the shaft and fixedly connected to the second panel, wherein the second connector is rotatable relative to the shaft and comprises a second surface that (i) remains in direct contact with the proximal side of the second panel whether the foldable structure is folded or unfolded, and (ii) when the foldable structure is unfolded, is in direct contact with the proximal side of the first panel and abuts upwardly against the proximal sides of the first and second panels, thereby helping to level the first and second panels.