The protection principle of the three helmets

A lot of work will see workers with helmets. People didn't mean it before. Now people's awareness of safety has increased. Workers know that helmets can protect their heads, but they don't know much about the protective principles of helmets . Here is a brief introduction to the protective principle of the helmet .

The protective principle of the helmet :

1. Buffering and damping effect: There is a gap of 25~50mm between the cap and the cap lining. When the object impacts the helmet, the cap does not directly affect the top of the head due to the deformation of the force.

2. Scattering stress effect: The cap is elliptical or hemispherical, and the outer surface is lubricated. When the object falls on the cap, the object can not stay and then slide down; and the cap receives the force received by the impact point to pass around, passing the cap The lining buffer can reduce the force by more than 2/3, and the other force is transmitted to the mandible through the entire area of ​​the cap lining, thus turning the force point into the force surface, and then preventing the impact force from being stressed at a certain point on the cap. Gathered and reduced the force per unit area.

3. Biomechanics: It is necessary for the national safety helmet to absorb 4900N. This is due to the biological experiment, the maximum limit of the human cervical vertebra when it is stressed. Beyond this limit, the cervical vertebra will be damaged, and the light will cause paralysis, and the severe one will endanger life.

The protective principle of the helmet is introduced here. Here, Xiaobian should remind everyone that those helmets with low quality and low price are best not to be taken, and it does not have a protective effect. In the selection of materials, the planning of the lining does not meet the requirements of the national standard. Once an accident occurs in the work, the user's head will be damaged, and the light will form a concussion, and the serious one will endanger life.

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