Contact device of circuit breaker

The utility model relates to a contact device of a circuit breaker, and pertains to the field of electric?switches. The device comprises a conductive component,?a transmission?rotation shaft,?a spring,?and a mounting shaft; a connection rod at one end of the conductive component is in pivoting connection inside the accommodating cavity of the transmission?rotation shaft via the mounting shaft, and the other end is provided with a U-shaped contact connected with the connection rod; the U-shaped contact comprises two parallelly-distributed contact arms and a connection board connecting the two contact arms; the spring is a double-twisting spring with a U-shaped structure; the U-shaped bending ends connected with the two twisting springs abut against the transmission?rotation shaft; and the other free ends of the two twisting springs respectively abut against the connection board. As one end of the double-spiral spring is matched with the transmission?rotation shaft, the spring feet at the other end are respecti