Circuit breaker

A circuit breaker comprising:

• a housing;
• a stator accommodated in the housing and connected to a terminal unit;
• a mover that pivots about an axis to be selectively brought into contact with the stator;
• an opening and closing unit manipulating the mover such that the mover is selectively brought into contact with the stator, wherein the opening and closing unit comprises:
• a first shaft connected to a power transmission unit, a link connected to the first shaft, a second shaft connected to the link, and a latch having a first end and a second end, wherein the first end of the latch is connected to the link by the second shaft;
• an insulating cover provided between the mover and the opening and closing unit, and shielding the mover and the stator from the exterior of the housing;
• and
• a holder connected to the second end of the latch, wherein the holder is movable about an axis in opposing first and second directions according to rotation of the first shaft, wherein the holder provides a contact force to the mover to cause the mover to pivot about the axis, wherein the axis of the holder is different than the axis of the mover;
• wherein the housing or the insulating cover is made by molding an electrical insulating material,
• wherein, a part of the insulating cover is inserted into the holder such that a side of the holder is formed to overlap with a portion of a side of the insulating cover.