Rotation device and electronic assembly utilizing the same

An electronic assembly comprising:

• a rotation device comprising:
• a fixed platform defining a through hole, and an annular groove formed in the inside wall of the through hole of the fixed platform;
• a first transmission element defining a plurality of teeth;
• a second transmission element received in the through hole and comprising a threaded axis portion and a toothed portion meshing with the plurality of teeth;
• an elastic member;
• a third transmission element comprising a rotation portion rotatably mounted in the through hole of the fixed platform and engaged with the annular groove of the fixed platform via the elastic member, and a threaded hole being defined in the rotation portion, and configured for cooperating with the threaded axis portion;
• a driver source fixed on the fixed platform and configured for rotating the first transmission element;
• and
• an electronic device mounted on the third transmission element.