Pivot structure

A pivot structure, comprising;

• a gear mechanism comprising a connecting board and a gear set, wherein the gear set comprises a first gear having a tooth portion, a plurality of transmitting gears, and an end gear, wherein the first gear, the transmitting gears, and the end gear are engaged in sequence;
• a first pivot assembly comprising:
• a first shaft passing through the connecting board and the first gear;
• and
• a first stand fixed at the first shaft;
• and
• a second pivot assembly comprising:
• a second shaft passing through the connecting board and the end gear;
• and
• a second stand, fixed at the second shaft, rotated between a closed angle and an opening angle relative to the first stand by the gear mechanism,
• wherein the transmitting gears comprises a first transmitting gear, the tooth portion drives the first transmitting gear to rotate the end gear when the second stand is rotated between a first middle angle and a second middle angle relative to the first stand, and the tooth portion is departed from the first transmitting gear when the second stand is rotated between the closed angle and the first middle angle relative to the first stand,
• wherein the closed angle, the first middle angle, the second middle, and the opening angle are arranged in sequence.