The Electro-Permanent Magnetic (EEPM) structure is designed so that the workpiece remains clamped after magnetization, allowing power to be cut off for wire disconnection. When combined with an automated pallet changer, it enables rapid workpiece exchange. The patented quick connector features automatic alignment and fine adjustment, reducing collision damage during insertion and removal, and extending the lifespan of the magnetic chuck. Protective covers for the mechanical rollers block liquids and metal chips, ensuring circuit safety and stable operation of the automated production line.