To keep in mind how helmet safety can be more desirable, we first need to understand how the brain is concussed or more seriously injured. Brain injury, which runs the gamut from a low level injury e. g. , sub concussive to the gravest of accidents e. g.
, major bleeding across the brain and/or diffuse injury to the axons, is attributable to extreme impact force or excessive acceleration or motion of the brain. These injuries can happen by direct impact to the helmet lined head or from violent flow of the pinnacle when another a part of the body is struck and the pinnacle, tethered to the body by the neck, gets tossed about. Regardless of whether or not the brain is increased from direct impact to the top or stream of the top from impact to the torso, it’s the motion of the brain in the skull that causes these injuries. The technological know-how of brain injury causation is very well advanced, but, alas, the development of head protection accessories has lagged behind. Here’s what we know about these two interrelated topics. First, we all know that coverage against skull fracture has been fairly common when the helmeted head continues to be coated and the helmet’s architecture effectively ameliorates the impact forces.
So, the 1st order of business is to design the restraint system to maintain the helmet on the pinnacle during foreseeable crashes. The second order of company is to come with a hard shell to deflect probably the most force of impact and spread the force over its surface, thereby decreasing the forces delivered to the impact area. The third order is to design a multi layered liner in a position to soaking up the closing forces via deformation to mitigate acceleration to the brain. Each of these retention techniques deliver some level of retention of the helmet under impact circumstances. However, in truth that with some frequency bicycle and bike helmets come off during dynamic collision events. This customarily occurs under two eventualities: the helmet slips off the head while still strapped or the helmet is structurally damaged, which in turn loosens the retention causing it to return off.
The safest retention device is a D ring. Once snug in opposition t the neck, it is extremely difficult to remove it without loosening the strap. The one major exception is the “half face helmet”, which can be easily removed while buckled. Here are pictures depicting the trying out of a “half face helmet”. When the load was dropped, the fully strapped helmet came absolutely off the pinnacle form. There are promising engineering solutions to these complications.
New bicycle, motorbike and mud bike helmets and one football helmet model have developed techniques that permit the shell to move a little independent of the liner to minimize the rotation of the helmet, head and brain. This can be done by using a movable shell outer membrane or by setting up a suspension or shock absorber placed among the shell and the shock attenuating liner, or by adding a plastic piece next to the wearer’s head yellow below that keeps the pinnacle desk bound while the shell moves during the impact. Here are two such methods: MIPS and the Omni Directional Suspension design.