Power supply device for helmet shield with electric heating wire

A power supply device for a helmet shield with an electric heating wire, comprising:

• a helmet shell having hinge sections on both sides, a shield attached at the front section of the shell, pivot apertures at both ends of the shield, locking tabs positioned around the pivot apertures, the pivot apertures being mounted on the hinge sections, and an electric heating wire embedded on an inner surface of the shield, wherein the power supply device is mounted on one of the hinge sections and comprises:
• a spacer integrated with the hinge section of the helmet shell, the spacer having at least one assembly hole and multiple fastening apertures, the assembly hole extending through the spacer and connecting to a mounting recess with a diameter greater than that of the assembly hole and oriented toward the helmet shell, and a shield seat positioned at the outer side of the spacer, the shield seat having a retention recess configured to accommodate and secure the locking tab of the shield;
• an electrical transfer assembly comprising a conductive screw and a nut, wherein the conductive screw extends through the assembly hole and is fastened to the nut positioned within the mounting recess;
• an electrical contact assembly mounted on the outer side of the shield, the electrical contact assembly comprising a contact terminal housed within an outer cover, the contact terminal including a contact surface and a connection end, the connection end electrically connected to the electric heating wire, and the contact surface configured to establish contact with the conductive screw;
• a power interface assembly comprising a power socket, a power wire, and an electrical connector plate, wherein the electrical connector plate is a plate structure having two terminal ends, one end connected to the power wire and the other end connected to the electrical contact assembly, and the power wire has two ends, one end connected to the electrical connector plate and the other end electrically connected to the power socket;
• and a power supply electrically connected to the power socket wherein the contact surface of the contact terminal is aligned within the pivot apertures of the shield, and the power wire is routed through a wiring channel of the shield to establish a connection with the electric heating wire.