A supporting mechanism comprises a body, a terminal and a supporting piece. Wherein the body is provided with a locking surface, a first side wall and a second side wall, the locking surface is connected between the first side wall and the second side wall, and the first side wall and the second side wall are not parallel to the locking surface. The terminal is fixed on the locking surface, and aconnecting wire is connected to the terminal. And the supporting piece is connected to the first side wall and the second side wall and extends from the first side wall and the second side wall in thedirection far away from the locking surface, and the terminal or the connecting wire leans against the supporting piece.