Support apparatus

A support apparatus comprising:

• a first body having a first mass greater than a threshold;
• a second body configured to carry an external electronic device;
• and
• a transmission mechanism connecting a first edge of the second body and the first body, based on the transmission mechanism, the second body being rotatable relative to the first body;
• wherein:
• in response to the second body having a first angle relative to the first body, the transmission mechanism is in a first state, and in response to the second body having a second angle greater than the first angle relative to the first body, the transmission mechanism is in a second state;
• and
• in response to the transmission mechanism being in the first state, a first reference point on the first edge and a center of gravity of the first body have a first distance, in response to the transmission mechanism being in the second state, the first reference point on the first edge and the center of gravity of the first body have a second distance, and the first distance is greater than the second distance.