Reliable head protection. Drawing, description

PERSONAL TRANSPORT: GROUND, WATER, AIR
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Reliable head protection. Personal transport

Personal transport: land, water, air

Directory / Personal transport: land, water, air

The human neck is a highly sophisticated mechanism that performs many vital functions. However, it is very compact, flexible and surprisingly mobile. All this allows us to consider it one of the most remarkable inventions of Nature. The only thing the neck is not designed for is to withstand the overloads that a person consciously subjects his own head to. The musculoskeletal system of the neck, for example, does not tolerate sharp linear movements and rotational movements of the skull that occur with various kinds of shocks and blows, especially to the chin or the back of the head. Such impacts usually result in concussion or even intracranial injury.

To combat such phenomena, an original helmet design is proposed, which consists of a protective grille, shock-absorbing shell and fastening straps.

The grill protects the head in the front hemisphere and, without touching the chin, falls on the chest. Due to the fact that it works under shock loads, its material must be strong enough. In this case, a bar with a diameter of 5 mm made of steel 65G was used.

The shell repeats the shape of the head and has two cuts in the back of the head for ease of putting on and taking off the helmet. It is made of recycled polyurethane foam (TU 6-05-1872-79). When using in the shell materials with a stiffness coefficient from 10 to 000 Pa, the safety distance between the protective grille and the face (a) is recommended to be 50 mm. Based on this, the remaining linear and angular parameters of the helmet should be as follows: b=000 mm, c=50 mm, R=54 mm, ?=60°, ?=165°, ?=164°, ?=143°.

The protective grille is connected in several places to the shock-absorbing shell. To do this, the rods relating to the parietal, frontal and temporal areas of the shell are wrapped with strips of polyurethane foam and attached with glue REL 5 TU-13 of the Ukrainian SSR 32-81.

The stable position of the helmet on the head is provided by two vertical and four horizontal straps made of woven elastic bands (TU 17-09-326-90). The first ones are pulled together under the chin, the rest - on the back of the head with the help of metal rings (although synthetic Velcro can also be used).

Helmet to protect against blows to the head (click to enlarge): 1 - protective grille; 2 - shock-absorbing shell; 3, 4 - helmet fastening straps; 5 - protective vest; 6 - vest fastening straps

The mass of the helmet with straps and rings is 1410 g. Despite some cumbersome design, it does not in the least interfere with the view and head turns.

How does a helmet work?

When striking from the front, the force applied to the protective grid is redistributed between the head and chest. Therefore, the point around which the head without a helmet would turn at the moment of impact moves from the junction of the cervical and thoracic vertebrae to the lumbar spine. That is, the musculoskeletal system of the abdomen and back, which is anatomically 8-10 times more powerful than the corresponding neck system, resists the impact and the subsequent rotational movement of the upper part of the body. Therefore, the probability of concussion also decreases by the same 8-10 times.

the process of redistribution of the load takes place and in the event of a rear impact, the force applied to the helmet is also transferred to the chest.

In side impacts, the protective grille moves freely parallel to the chest. However, a jaw fracture is completely ruled out, since there is no contact between the chin and the grate in any blows to the head.

The helmet was tested in the training of amateur boxers for two years. Quite often - with a protective vest covering the chest. During this time, not a single knockout or knockdown happened. I think that the helmet could be used not only in boxing, but also where accidental blows to the head are possible, for example, in amateur and professional auto and motor sports.

Author: V. Pashenkovskiy

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