Patent ID: 8212440
Filing Date: 2012-07-03
Classification: H04M

Abstract:
1. A rotation structure, comprising: a first rotatable segment comprising a first base and defining a first through hole in the first base; a second rotatable segment comprising a second base corresponding to the first base and defining a second through hole in the second base; a connecting portion comprising a screw; the screw comprising a first threaded end and a second threaded end; the first rotatable segment being rotatably connected to the first threaded end by the first through hole, the second rotatable segment being rotatably connected to the second threaded end by the second through hole; a drive device comprising a plurality of electromagnetic elements disposed on the first base around the first through hole at a predetermined angle, and a magnet fixed on the second base; and a controller electrically connected to the electromagnetic elements for selectably magnetizing the electromagnetic elements.