The invention discloses a fast-switch self-cleaning cam switch, which comprises a contact base with a cam, and moving contact mechanisms. Wherein, the bracket on cam side connects with one end of metal supporting member with wedge-shaped slots on sides, the bottoms of two contacts arranged in wedge-shaped slot with a spring are edge shape; there is a compression spring between another end of metal supporting member and contact base inner wall. This invention overcomes the low speed of switch contact and bad contact as fouling. |