Economic double-story umbrella as conveniently anchored

A double-story umbrella comprising:

• a lower umbrella including a central shaft, a lower rib assembly pivotally secured to the shaft and a lower umbrella cloth having a central opening formed therein and secured to the lower rib assembly;
• an upper umbrella formed with an upper umbrella cloth secured to a top of said shaft;
• a plurality of detachable restorable buckling means radially disposed on said upper and lower umbrella cloths, each said buckling means including an upper buckling member formed on an outer periphery of said upper umbrella cloth and a lower buckling member formed on an inner periphery of said lower umbrella cloth and engageable with said upper buckling member for coupling said upper umbrella cloth on said lower umbrella cloth;
• wherein each said detachable restorable buckling means including said upper buckling member;
• and said lower buckling member having a restoring spring resiliently retained between said upper and lower buckling members;
• whereby upon wind blowing, said upper buckling member will be upwardly pulled from the lower buckling member to open the upper umbrella cloth from the lower umbrella cloth;
• and upon releasing of wind, the restoring spring will restore the upper buckling member towards the lower buckling member to close the upper umbrella cloth on the lower umbrella cloth;
• and
• a supporting means including a sleeve adjustably detachably secured to a lower portion of said central shaft by an adjusting screw and including a plurality of supporting members operatively extended to be laid on a ground or anchored in a ground for stably erecting the shaft and the double-story umbrella;
• and upon folding of said plurality of supporting members towards said shaft, said supporting means will be folded for storage and handling.