Extendable table assembly

An extendable table assembly comprising:

• a primary board;
• a support unit mounted on a bottom face of the primary board;
• a foldable primary stand pivotally connected with the support unit;
• an extension unit arranged under the primary board and connected with the support unit;
• a secondary board placed on the extension unit;
• and
• a connecting unit mounted between the support unit and the extension unit, to connect the primary board with the extension unit;
• wherein:
• the extension unit is moved away from the primary board in an expanding direction and moved toward the primary board in a folding direction reciprocatingly;
• the extension unit includes a strut, an enclosure frame connected with two ends of the strut and connected with the support unit, and a foldable secondary stand movable in concert with the extension unit;
• the secondary stand includes two legs each having an upper end pivotally connected with the enclosure frame and a V-shaped brace mounted between the two legs and the strut;
• the two legs cooperate with the primary stand to support the primary board;
• the strut of the extension unit is mounted on the bottom face of the primary board;
• the enclosure frame includes two side rails connected with the two ends of the strut respectively and a connecting rail connecting the two side rails;
• the support unit and each of the two side rails are provided with a plurality of pin holes;
• and
• the connecting unit includes two pins each inserted into one of the pin holes respectively to secure the support unit and the two side rails.