Part of the helmet is a blade worn on the head.
The best-selling electric bicycle helmet on the market was selected for testing on the evening of 3 15. Firstly, the performance of absorbing collision energy was tested. Testers put the helmet on the headform, pulled it up to the height of 1.6 meters, and released it, simulating the scene that the cyclist's head wearing a helmet collided with the ground when he fell. A red helmet cracked, creating a crack more than 20 centimeters long. The reporter found that some helmet manufacturers use inferior materials such as recycled materials for production in order to reduce costs.
The second is the penetration resistance test, in which the tester pulls the steel bar head to the height of 1 m to release it, simulating the helmet's ability to protect the wearer's head when encountering sharp objects. Eight helmets failed to meet the requirements of the new national standard, and some were almost split in half.
The third is to test the wearing device of electric bicycle and simulate whether the helmet can be fixed on the wearer's head for continuous protection in the event of an accident. * * * There are 16 items that do not meet the requirements of the new national standard.
The fourth is the wear resistance test of goggles. Some models 16 do not meet the requirements of the new national standard, and the transparency of wearing lenses is obviously reduced, and the imaging effect is greatly reduced.
At present, many places have required electric cyclists to wear helmets, otherwise they may face fines. For example, as early as May 20265438 1, in the Regulations of Shanghai Municipality on the Safety Management of Non-motor Vehicles, drivers and riders of electric bicycles should wear safety helmets. Violators will be warned by the public security organs or fined from 20 yuan to 50 yuan.
With the requirements of wearing helmets in various places, a large number of enterprises producing toys and plastic products have flooded into the helmet industry. According to Tianyancha data, there are nearly 284,000 helmet-related enterprises in China. In terms of geographical distribution, Guangdong, Shandong and Jiangsu have the largest number of helmet-related enterprises, exceeding 53,000, 32,000 and 29,000 respectively.
On June 65438+February 1 day, 2022, the standard "Helmets for Motorcycles and Electric Bicycles" was issued, which put forward specific requirements for the helmet's performance of absorbing collision energy, penetration resistance, stability of fixing devices, strength performance of wearing devices, and wear resistance of goggles.
This standard is a national mandatory standard and will be implemented on July 1 2023. In other words, helmets produced after July of 1 year must meet this standard before they can be listed, and the quality of helmets will be improved.
How to choose the helmet that suits you?
At present, the price of helmets on the market ranges from tens of yuan to hundreds of yuan, with different styles and high anti-collision strength. You can buy according to your actual situation and requirements. However, you must pay attention to the following points when purchasing:
1, buy qualified products with complete marks.
Buy brand-name products with certificates, trademarks, factory names, factory addresses, production dates, specifications, models, standard codes, production license numbers, product names, complete logos, neat printing, clear patterns, neat appearance and high reputation.
2. The helmet can be weighed
The national standard of motorcycle helmet GB8 1 120 10 stipulates that the helmet mass is not more than1.60 kg; ; The mass of the semi-helmet is not more than 1.00kg. Under the condition of meeting the standard requirements, the heavier helmet is generally of better quality.
3. Check the length of the tieback connector.
The standard requires that the inner and outer surfaces of the shell should not exceed 3 mm. If it is rivet riveting, it can generally be achieved, and the process performance is good; If it is difficult to connect with screws, it is best not to choose.
4. Check the strength of the wear device
Fasten the belt correctly according to the instructions, fasten the buckle and pull hard. There should be no sliding, tearing, belt tearing, connector falling off, buckle loosening and fracture.
5. If the helmet is equipped with goggles, check its quality.
First of all, there must be no appearance defects such as cracks and scratches. Secondly, the lens itself should be a colorless and transparent polycarbonate (PC) lens. Never use plexiglass lenses.
What is the safest material for a helmet?
1, ABS resin
The most common engineering plastics have high cost performance, strong impact resistance and good dimensional stability. The price of ABS resin helmet is around 100 ~ 300 yuan.
2.PC+ABS alloy
The strength and toughness of this material are better than ABS. The price of PC+ABS helmet is about 300 ~ 1000 yuan.
3. forward refueling area (same as forward refueling area)
The helmet made of this material is made of fiber reinforced plastic, which is light but strong. But industrial technology is more complex, with lower quantity and output and higher price. The price of FRP helmet is about: general 1000 yuan or more.
4. Carbon fiber
The helmet made of this material is characterized by light weight and high strength, but it is expensive because of high production process requirements. General 1000 yuan or more
5.PP material
This material is generally a toy or decorative helmet, which has poor safety and low price. When there is really no helmet to wear, it is better to wear it than not to wear it.
The order of safety factors of various helmet materials is: carbon fiber reinforced plastic PC+ABS alloy ABS resin.
How to wear a helmet correctly?
Wearing a helmet is also very particular, and wearing it correctly can play a role in safety protection.
When wearing a helmet, the helmet should be parallel to the head, and it is not allowed to lean forward or backward. Tilting the helmet backward will block the line of sight and cannot protect the safety of the position behind the head, while tilting the helmet forward will cause the helmet to fail to protect the safety of the forehead position.
The edge of the helmet should be about 1 cm above the eyebrows, and the width of the strap below the head should be about two fingers. After wearing the helmet, there should be no shaking from side to side.