Reinforced pin which hinge couples a rotatable shaft to the transfer link in a circuit breaker

A circuit breaker, comprising:

• a stationary contact installed in a fixed manner;
• a movable contact configured to be brought into contact with or separated from the stationary contact;
• and
• a switching mechanism configured to switch the movable contact,
• wherein the switching mechanism comprises:
• a shaft rotatably installed therein;
• a transfer link configured to transfer a driving force from the shaft to the movable contact;
• and
• a pin configured to hinge-couple the shaft to the transfer link and insulate them from each other,
• wherein the pin is installed with a wear resistant member at a portion brought into contact with a shaft arm of the shaft,
• wherein the pin comprises an insulating member formed in a cylindrical shape,
• wherein the wear resistant member is formed with a pipe and attached to the portion brought into contact with the shaft arm of the shaft, and
• wherein the wear resistant member is installed on the insulating member in a fixed manner not to be released therefrom.