Moving contact mechanism

A moving contact mechanism, comprising a contact support which is disposed to rotate around a third axis, a moving contact and a contact spring, the moving contact is pivotally disposed around a contact axis, and both ends of the contact spring are a third end of the spring and a fourth end of the spring, respectively, the third end of the spring being rotatably connected to the moving contact, the fourth end of the spring being rotatably connected to the contact support;

• a geometric axis of the contact spring is a second axis line;
• wherein the second axis line is located on one side of the third axis when the moving contact is normally switched on or off, and the contact spring keeps the moving contact in a normally switched-on position or a normally switched-off position;
• the moving contact rotates relative to the contact support when the moving contact is repelled by an electric repulsion force generated by a short-circuit current;
• and the moving contact drives the contact spring to rotate around the fourth end of the spring, so that the second axis line swings to the other side of the third axis, and the moving contact remains in a temporary breaking position;
• said moving contact mechanism further comprising a conductor and a fastener, the conductor comprises a conductor connecting plate, and a first clamping arm and a second clamping arm which are disposed to face each other at intervals;
• both ends of the conductor connecting plate are connected to the first clamping arm and the second clamping arm in a bending manner, respectively;
• the moving contact comprises a moving conductive rod and a moving contact point disposed at one end of the moving conductive rod;
• the moving conductive rod comprises a conductive rod contact part which is inserted between the first clamping arm and the second clamping arm and rotatably connected to the conductor;
• in a free state, a spacing between the first clamping arm and the second clamping arm is D1, and the thickness of the conductive rod contact part is D0, D1>D0;
• and the fastener is disposed between the conductor connecting plate and the conductive rod contact part, and is connected to the first clamping arm and the second clamping arm, respectively, so that the first clamping arm and the second clamping arm clamp the conductive rod contact part.