Patent ID: 8296904

Claim:
A hinge assembly comprising: a conversion adapter comprising a hollow column and a hollow protrusion pole, wherein the hollow column communicates with the hollow protrusion pole; a pivoting element rotatably connected to the conversion adapter, and comprising a first side plate, a connection plate, a positioning pole, a protrusion block, a protrusion ring, a guide pole, and a flange, wherein the positioning pole is protruded from the first side plate, the protrusion block is protruded from the connection plate, and the protrusion ring and the guide pole are protruded from the protrusion block, the guide pole is set in the center of the protrusion ring, the flange is formed in a distal end of the guide pole; an axel; and a rotation element rotatably placed over the axel; wherein, the protrusion ring is rotatably placed over the protrusion pole, and the rotation element is rotatably placed over the guide pole.