Collapsible spoon-bottom chair

A spoon-bottom chair comprising:

• a bowl-shaped bottom;
• a first pair of rails attached thereto;
• a pair of scissor-type levers, each of said levers having first and second ends, said first ends being slidable in a respective one of said guide rails, said guide rails being formed with a multiplicity of recesses, each of said first ends being formed with two projections placeable within two of said recesses, respectively;
• an extensible seat hingeably attached to said second ends, said seat being movable from a seating position outside of said bowl to a collapsed position within said bowl, said seat comprising a first tube and a first pair of bars slidable in opposite directions within said tube, each of said first pair of bars including a transverse rod integral therewith, each of said second ends of said levers being hingeably attached to a respective one of said first pair of bars;
• a second pair of scissor-type levers substantially identical with the first pair of scissor-type levers, each lever of said second pair of levers having third and fourth opposite ends;
• two crossbars rigidly connecting both scissor-type levers;
• and
• a second pair of guide rails attached to said bottom and disposed in parallel with the first pair of guide rails, said third ends being slidable in said second pair of guide rails, said fourth ends being hingeably attached to a respective one of said transverse rods, whereby the height of said extensible seat above said bowl is adjustable.