Durable switch of rolling contact type

The utility model discloses a durable switch of rolling contact type, including shell, base, circuit board, knob, swinging boom and electrically conductive gyro wheel, the circuit board is installed on the base, the swinging boom is connected at the knob lower extreme, electrically conductive gyro wheel is installed at the swinging boom lower extreme, the contact of and gate board, and electrically conductive gyro wheel can roll on the circuit board, the shell cladding is provided with the stop gear who prevents the swinging boom and reciprocate on the shell inner wall outside swinging boom, electrically conductive gyro wheel, circuit board. The utility model discloses to electrically conduct the gyro wheel as and gate board contact, control circuit switches on and the contact device that breaks off, electrically conductive gyro wheel rolls at the circuit board and realizes the break -make function of switch, can effectively reduce circuit board and contact device's mechanical wear, improves the working life of switch, the utility model discloses still having set up anti -disengaging structure, not only having guaranteed the stability and the reliability of the installation of electrically conductive gyro wheel, the degree of difficulty can also be assembled by greatly reduced to anti -disengaging structure's design, improves the flexibility of operation.