Strip type off-circuit tap changer

A strip type off-circuit tap changer, comprising:

• an insulating rod;
• and
• a support, wherein an operation positioning device is arranged on the support, a drive gear is disposed at a lower end of the operation positioning device and a rack mobile frame is disposed on the insulating rod, a rack of the rack mobile frame is engaged to the drive gear of the operation positioning device, columnar fixed contacts are longitudinally arranged at a spacing on the insulating rod, the rack mobile frame is connected to a moving contact frame, a moving contact assembly is arranged on the moving contact frame and fits with the fixed contact on the insulating rod, the moving contact assembly is formed by an annular moving contact and an elastic pin, the elastic pin is arranged in an inner ring of the annular moving contact, and the annular moving contact spans between two adjacent columnar fixed contacts,
• wherein the elastic pin is formed by a sliding pin and a return spring;
• wherein a rear section of the sliding pin fits with a sliding hole of the moving contact frame, a head with a diameter larger than that of the rear section of the sliding pin at a front end of the sliding pin fits with the annular moving contact, and the return spring is sleeved outside the sliding pin;
• and
• wherein the moving contact frame is arranged with a cantilever bent downwards, a sliding slot is opened at an inner side of the cantilever and fits with a lower end of the insulating rod in a sliding manner.