Wheel rim device

A wheel rim device adapted to be mounted on an axle of a vehicle and adapted for a tire pressure detector to be mounted thereon, comprising:

• a wheel rim body adapted to be mounted on the axle and adapted for the tire pressure detector to be mounted thereon;
• an electric power generating mechanism mounted to said wheel rim body and configured to be driven by said wheel rim body to rotate to generate electric power;
• and
• a tire pressure indicator mounted to said wheel rim body and electrically coupled to said electric power generating mechanism to receive the electric power generated by said electric power generating mechanism, said tire pressure indicator including a wireless communication module, a light emitting module with a plurality of light-emission modes, and a control module that is signally connected to said wireless communication module and said light emitting module, when said wheel rim body rotates, said electric power generating mechanism rotating and generating the electric power, such that said tire pressure indicator receives the electric power and is energized, said wireless communication module being adapted to wirelessly receive a tire pressure signal that is transmitted by the tire pressure detector after said tire pressure indicator is energized, said control module being configured to, after the tire pressure signal is received, obtain a tire pressure value from the tire pressure signal and control said light emitting module to emit light in one of the light-emission modes according to the tire pressure value.