Can't pick an electric bicycle helmet? Don't buy blindly, the expert will give you some advice

Recently, with the increasing efforts of traffic police departments to crack down on the behavior of electric bike riders not wearing safety helmets, helmets have become a necessity for electric bike owners. There are now a variety of helmets available on the market, so how to choose safety helmets?

Ren Zhimin, Senior Engineer of Hebei Provincial Institute of Product Quality Supervision and Inspection, introduced that the civilian helmets circulating in the market are mainly divided into motorcycle passenger helmets and sports helmets worn by cyclists, skateboarders, and roller skaters. The implementation standards mainly include the national standard GB24429-2009 "Safety Requirements and Test Methods for Sports Helmets for Bicycles, Skateboards, and Roller Skating Sports Helmets" drafted by the institute, and the national standard GB811-2010 "Motorcycle Passenger Helmets" participated in the drafting.
At present, the safety helmets worn by electric cyclists are mostly motorcycle passenger helmets. Motorcycle passenger helmets are Compulsory Certification (CCC) products, which can be divided into Class A helmets and Class B helmets based on performance and usage objects. The A-class helmet is intended for motorcycle passengers with a total displacement of 125 milliliters (including 125 milliliters) or more, and has the shape of a full helmet and a half helmet. The B-class helmet is intended for motorcycle occupants with a total displacement of less than 125 milliliters and is shaped like a half helmet. Sports helmets are divided into four specifications: large, medium, small, and extra small, according to GB/T10000 "Chinese Adult Body Dimensions" and the head circumference of minors. Helmets should be composed of a shell, buffer layer, comfort pad, wearing device, goggles, etc. The shell is made of materials that are tough, water-resistant, heat-resistant, cold resistant, and can absorb more impact energy.
Consumers should pay attention to the following points when purchasing helmets: choose safety helmets with complete identification from regular supermarkets; Choose a qualified helmet that suits your head size; Press the buffer layer with your hands, ensuring a dense texture and avoiding any debris or pits; After tying the tie, use force to pull and see if there is any looseness or breakage; Protective goggles should be transparent, with a standard requirement of a light transmittance of no less than 85%. Colored goggles have an unqualified light transmittance. Consumers should pay attention to the following points when using helmets: choose a matching safety helmet based on the weather and actual travel conditions; Tie the straps tightly when using; If a helmet has experienced a major impact accident, it should be stopped from use or sent to an inspection and testing agency to see if it can continue to be used; Pay attention to storage, do not use corrosive solvents to scrub the surface of the helmet, and do not hit the helmet; Pay attention to the usage period stated in the manual.

Ren Zhimin conducted three on-site tests on the helmet's ability to absorb collision energy, the impact resistance of goggles, and the helmet's field of view performance. The standard requires that the performance value of the helmet absorbing collision energy should not exceed 300G. Consumers who purchase helmet samples without a buffer layer have tested 961G, which far exceeds the standard value and does not provide any protection. It may cause slight concussion to the wearer, and in severe cases, it may lead to head fractures. The steel cone used to test the impact resistance of the goggles falls freely from a height of 1 meter. If the goggles do not break, it is considered qualified. A helmet with an upper field of view greater than 7 degrees, a lower field of view greater than 45 degrees, and a left and right horizontal field of view greater than 105 degrees is considered a safe field of view.
Hebei Provincial Institute of Product Quality Supervision, Inspection and Research has participated in the revision of the national standard GB811-2010 "Motorcycle Passenger Helmets", which includes relevant content on electric bicycle helmets. Class A is motorcycle passenger helmets, and Class B is electric bicycle helmets. There will be eye-catching markings on the rear of the helmets for easy identification by traffic police; The standard regulations for ventilation holes on electric bicycle helmets have been added to improve the comfort of wearers. This standard has been drafted for approval and will be released for implementation after review and approval. At present, electric bicycle riders can wear motorcycle passenger helmets to further enhance their safety protection capabilities, but they cannot wear sports helmets for cycling or roller skating because the prescribed driving speed of electric bicycles does not exceed 25 kilometers per hour, and sports helmets cannot meet safety protection requirements.