Nowadays, the electric bicycle is an important means of transportation for people. In real life, some drivers do not observe the safety rules, especially neglect to wear helmets, which leads to frequent cases of personal injury caused by safety accidents. On the current market Electric vehicle helmet There are many brands, and the executive standards are mostly enterprise standards. Their quality is uneven, and some even have potential safety hazards. The results show that most of the samples are worrisome, and the problems mainly focus on the strength performance of the wearing device and the performance of the helmet in absorbing collision energy.

It is reported that the investigators purchased 20 models from offline stores and online e-commerce platforms respectively Electric vehicle helmet Samples, involving GIANT, YEMA, Mustang and other nominal brands.

The strength performance of 13 models is not up to standard

The wearing device is used to fix the helmet and is an important part of the helmet. Helmets should be stable and safe during wearing. Among them, the stability requires that the helmet is not easy to fall off during wearing, and 20 helmet samples all meet the standard requirements.

The strength performance of the wearing device is an important indicator to test whether the wearing device can firmly fix the helmet on the user's head in case of collision, so as to protect the user from injury. The results showed that three helmet samples sold in physical stores failed to meet the test standards, while 10 helmet samples sold online failed to meet the test standards. During the strength performance test of the wearing device, there were problems such as the connector falling off, the tie buckle loosening, and the dynamic and static elongation exceeding the standard, which could not guarantee the safety of the user.

The main reason for the unqualified strength performance of the wearing device is that the structural design of the parts selected by the enterprise is unreasonable, that is, the strength is not enough, resulting in brittle fracture of the gear at the harness of the helmet in use. Generally, the size of the lacing buckle gear of this type of product is obviously smaller than that of other similar products, and the strength of the lacing buckle is poor, which causes the loosening of the lacing buckle, resulting in the fall off of the helmet, and can not play a protective role. This kind of helmet is easy to fall off, let alone protect the head, if encountering strong wind or branches scratching during riding.

14 models have poor performance in absorbing collision energy

The performance of absorbing collision energy is the most important safety index of helmet, and also the key point of helmet protection performance. GB24429-2009 Safety Requirements and Test Methods for Sports Helmets, Bicycles, Skateboards, and Roller Skating Helmets stipulates that the peak acceleration of helmets in collision shall not be greater than 300g; In addition, the shell shall not be cracked during the test, which may endanger the wearer. The performance of absorbing collision energy is the most problematic and serious project. Of the 20 helmet samples, 14 did not meet the standard requirements.

The shell materials that usually meet the requirements of the standard are generally new and tough hard plastics, such as ABS (material), but some helmets, such as those mixed with glass fiber reinforced materials, are mixed with recycled materials through testing, which is what the industry calls "nozzle materials". Although the appearance cannot be seen, in actual testing, The performance difference is obvious.

In addition, riding helmets with excellent quality should have a certain strength shell to resist the damage of sharp objects, as well as an indispensable buffer layer to reduce collision energy. Therefore, in the national standards for motorcycle helmets and bicycle helmets, there is a buffer layer requirement for riding helmets, so as to ensure that the top, side and back of helmets can absorb collision when users fall down, and play a role in safety protection. Some electric vehicle helmets in this risk monitoring do not have such a buffer layer.

Hidden danger in helmet vision

Helmet field of vision refers to whether the helmet is blocked up, down, left and right. When trying on the helmet, you should carefully observe the field of vision of the helmet to see if the field of vision of the upper, lower, left and right is blocked. The qualified helmet has a wide field of vision when wearing, and the harness and helmet accessories should not block the wearer's field of vision.

Although the field of vision of the 20 samples meets the requirements of GB24429-2009 Safety Requirements and Test Methods for Sports Helmets, Bicycles, Skateboards, and Roller Skating Helmets, most electric vehicle helmets are also equipped with goggles in brown or other colors, and the light transmittance of the goggles will directly affect the riding safety. Goggles that can meet the requirements of national standards are generally colorless, and the light transmittance of colored goggles will be greatly reduced, affecting the clarity of the field of vision during riding, and there are potential safety hazards.

● Consumption reminder

Choose helmets with guaranteed quality

Zhenjiang Market Supervision Bureau and Zhenjiang Consumer Association remind consumers to pay attention to the following points when purchasing helmets:

Don't be greedy for bargains. Be sure to purchase a brand with good reputation and large scale through formal channels, and carefully check the product name, certificate, factory name and address, executive standards, etc. of the package when selecting. Poor helmets can not protect the head as they should, and even cause parts to break due to collision, resulting in secondary injuries to the human body.

Pay attention to the helmet material. When purchasing, you can touch the inner liner of the helmet with your hand to confirm whether it is soft and comfortable, and whether it fits firmly with the inner side of the helmet; Press the foam plastic buffer layer between the shell and the liner, and try to select products with high density and thick size.

To have a wearing experience. Conditional consumers can try it on to ensure that the size fits the head and the vision is not affected; Carefully check whether the hand pulled tie and buckle are tight, and the stretching degree should not be too long.

Do not buy helmets with large ventilation holes. The larger the ventilation holes on the helmet, the more exposed the head is, and the protection coefficient will be reduced accordingly.