Swing arm component for toy car

A swing arm assembly for a toy car, comprising:

• a housing, which comprises a cavity and a communication port that communicates with the cavity;
• a gear train, which is located within the cavity and comprises a plurality of gears, each of the plurality of gears is rotatably provided on the housing, and some of the plurality of gears are connected with a wheel;
• a light strip, which is connected to the housing;
• a circular brush disc, which is located inside the cavity and at the communication port;
• the circular brush disc is configured to be fixed to a car body and comprises a first slip ring and a second slip ring;
• wherein the first slip ring is located an outside of the second slip ring;
• two brush blades, both of which are provided on the housing, one brush blade is attached to the first slip ring and the other brush blade is attached to the second slip ring;
• one ends of the two brush blades are connected to the light strip;
• during a rotation of the housing relative to the circular brush disc, the two brush blades are respectively kept in contact with the first slip ring and the second slip ring.