Safety helmet with alarm means for calling for help

摘要

A safety helmet having an alarm device, which automatically gives an audio alarm signal to call for help upon an accident, and a fan for ventilation, the alarm device having signal lamps controlled by a first switch to flash when the safety helmet is put on the head, and an alarm control circuit controlled by a second switch to produce an audio alarm signal through a buzzer when the user loses consciousness due to an accident and the safety helmet falls with the user to the ground.