Elevating apparatus of table

An elevating apparatus of a table, comprising:

• a board;
• two legs respectively connected to two lateral members disposed at a bottom of the board, and each leg having a leg base at a bottom thereof, a hollow outer column disposed on the leg base and having a guide rail disposed on an internal side of at least a first side of the hollow outer column, a teeth-guiding slot formed in a second side of the hollow outer column adjacent to the first side thereof and a pulley slot formed in a third side of the hollow outer column and disposed in opposing relationship to the teeth-guiding slot, and each leg further having an inner column movably inserted into the hollow outer column and connected to the board at a top side thereof;
• and
• a height adjusting apparatus having a gas spring inserted into the inner column of each of the two legs, and each leg including a chute disposed on an outer surface of a first side of the inner column in correspondence with the guide rail of the hollow outer column, a gear rack disposed on a second side of the inner column adjacent to the second side of the hollow outer column and in correspondence with the teeth-guiding slot, a guide gear pivotally coupled to the teeth-guiding slot of the hollow outer column and in toothed engagement with the gear rack, and a pulley pivotally connected to the pulley slot of the hollow outer column and disposed in contact with a third side of the inner column, the third side being opposite to the second side of the inner column, wherein the chute of each inner column is provided with plural arc portions equally spaced apart from each other at two lateral sides thereof for contact with the guide rail.