US Patent 10303212 Rotary combination module for tablet computer

A rotary combination module for a tablet computer, which includes a pad and a dock, to engage the pad with the dock, the rotary combination module comprising: a rotation part, disposed on the back of the pad, for rotating on the pad as a rotation plane; an extension part, connected with the rotation part, for shifting in the rotation part and positioning at a predetermined location; and a stand, connected to the extension part, for turning away from the extension part and positioning at a predetermined angle.