Electric contact system

An electric contact system, comprising:

• a moving member movable in a vertical direction;
• a movable contact mounted on the moving member and moved in the vertical direction with the moving member;
• a static contact, the movable contact moves between a switch-on position in which the movable contact is in electrical contact with the static contact and a switch-off position in which the movable contact is separated from the static contact;
• an arc extinguishing device including a movable bracket movable in a horizontal direction perpendicular to the vertical direction and an arc extinguishing sheet mounted on the movable bracket and movable in the horizontal direction with the movable bracket, the movable bracket is moved by the moving member between a first position and a second position when the movable contact is moved between the switch-on position and the switch-off position, when the movable bracket is moved to the first position the arc extinguishing sheet is moved beyond a contact area between the movable contact and the static contact and allows the movable contact to electrically contact the static contact, and when the movable bracket is moved to the second position, the arc extinguishing sheet is moved into the contact area between the movable contact and the static contact to electrically isolate the movable contact from the static contact, the movable bracket has a slot and the moving member has a connection shaft, an end of the connection shaft is slidably supported in the slot, when the moving member moves the movable contact between the switch-on position and the switch-off position, the connection shaft slides in the slot and pushes the movable bracket to move between the first position and the second position;
• and
• a pair of support plates on which the movable bracket is slidably supported to be slidable in the horizontal direction, the pair of support plates are located at opposite sides of the movable bracket, a sliding slot extending in the horizontal direction is formed in each of the pair of support plates, the movable bracket has a connecting shaft on each side of the movable bracket and an end of the connecting shaft is slidably supported in the sliding slot.