A safety helmet is a cap that protects the human head from injuries caused by falling objects and other specific factors. It consists of a cap shell, a cap lining, a chin strap, and accessories. The cap shell can withstand blows and separate the falling objects from the human body; the cap hoop can keep the helmet in a certain position on the head; the top strap is responsible for dispersing the impact force; the chin strap should assist in maintaining the state and position of the helmet; Cushioning pads reduce impact.

According to the color, the helmet can be divided into four types: white, red, blue and yellow. White safety helmets are generally used by project supervisors or Party A, red safety helmets are generally used by technicians, managers or Party A, blue safety helmets are generally used by technicians, and yellow safety helmets are the most common. Use a yellow hard hat.