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Kamis, 07 Juni 2012


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              Bicycle helmets are designed to reduce the impact of falls on the head, at least to minimize the effects of visual interference. There is a scientific debate but not a consensus, in which the debate about whether or not bicycle helmets for bicycle riders, and they also menyanksikan whether the benefits worth the loss. The debate will need to use a bicycle helmet or not very complicated in the realm of law and discussion of complications, because it is often based on different interpretations academically, but also because of different assumptions and different interests as well.

               History of the bicycle helmet designHairnet helmet is a helmet that is generally circular in design is light and has enough ventilation, because cycling is an aerobic activity that can significantly increase the temperature of the body when running, and the head requires a special design in order to regulate the temperature circulation. in the 1970s, the dominant form of hairnet helmet is a helmet, the helmet is designed to protect the scrapes and cuts, and its protection is minimal, which is used for racing cyclists.
                Wider use of helmets in the 1970s occurred in the United States. After several decades, when the bike is only regarded as children's toys, many of American teens use a bicycle when and after the year 1970 alone. Two of the first modern bicycle helmets made by MSR, a manufacturer of mountaineering equipment and Bell Sport is the manufacturer of helmets for racing cars and motorcycles. This helmet is a spin-off from the development of polystyrene foam liners for helmets used motorcycles and motorsport, has a hard shell of polycarbonate plastic. Bell bicycle helmets split from the parent company in 1991 and stands as the Bell Sports Inc., which eventually transferred their business to the production of motorcycle helmets and motorsport.
                 The first bicycle helmet that is specifically designed for commercial purposes is Bell's most famous biker, hard-line polystyrene shell was released in 1975. At the moment there is no corresponding standard, the only effect is the product of Snell, motorcycle helmets with face open. Over time, the design is refined, and in 1983 Bell made-Pro V1, the first plastic helmet used for bike racing. And in 1984 produced Li'l Bell Shell Bell, children helmet shell. At first this helmet has a small vent.In 1985, Snell B85 was introduced, for the first time the standardization of bicycle helmets are widely adopted, which is then refined into B90 and B95.
                  At this time almost all helmets produced by hard-shell-shell (with vacuum cover made of plastic). Ventilation was still minimal mainly due to technical limitations of the foam and shells are used.A Giro Atmos helmet, construction mold microshell show. Around 1990 new construction techniques found that mold microshell. A very thin shell was established during the printing process.
                  High level of technology is very dominant in the making, allowing for greater ventilation and more complex shapes than a harder shell.The use of hard shell down the prestige rapidly among the general population of cyclists in the 1990s, virtually disappeared by the end of this decade, but remains popular with BMX riders and inline skaters and players skateboard.Akhir the 1990s and the early 2000s saw advances in retention and fitting system, replacing the old system of different thickness foam pads with sufficient and appropriate to the rider's head.
                   It also resulted in the back of the head are less covered by a helmet; but this rarely happens, but it does not make a modern bike helmets are less suitable for activities such as unicycling, skateboarding and inline skating, because the design is fully covering the head. Other helmets are better suited for this activity.Fit and Care Use of helmets is very important for cyclists, standards-compliant helmets are highly recommended, because there is now an international standard for the manufacture of safety helmets and ride comfort, need attention. In a study conducted tehadap children aged 4-18 years 98% note that they use the helmet is not the right way, or home use. At the helm of a State to correct usage is very low, so the risk of accidents was higher even double that.Most manufacturers provide bicycle helmets in various sizes ranging from children to adults with a variety of sizes extra small, medium to large.
                Size corresponding to the user is very important. Some adjustments can usually be made using foam pads denganketebalan different. Helmets used in the head with nylon rope, tailored to each individual. It's a bit hard to do, depending on the level of difficulty in the design or manufacture. Installation of the bicycle helmet straps must go through most of the measurements and the correct installation that allows two ropes and helmets in the right position. In addition, some bicycle helmets should be adjusted in the making should be in conformity with the occipital region of the skull.
                 It provides protection sempurana, so any bike helmet is only suitable for every type of bicycle helmets are not used to like to roller skating, stunts, skateboarding and unicycling, this design requires more special. In general, a helmet should be able to cover the entire skull, the more effective in the installation then the head will be more comfortable, because more of it will also protect the head in an accident (when manufacturing is made in accordance with the applicable standard of bicycle helmets in general).
                 The new helmet for toddlers and children shown on the back of the helmet flat which prevents the helmet tilted too far forward when worn, while riding in the seat trailer. Although this feature does not increase the protection of the influence of usage, but importantly their comfortable.
                 The Snell Memorial Foundation recommends that any helmet that has been damaged or defective should be discarded and replaced, including a helmet that had lodged in an accident where the head had been injured. Because some helmet materials deteriorate due to age, Snell Memorial Foundation recommend that helmets be replaced at least every 5 years, or sooner if the manufacturer recommends it.
                  Salvation of the soul is everything, death can not we elakkan because it is the nature of all human beings and living creatures in the world, but at least we as a civilized human being trying to keep ourselves from things that are bad and not good for us, family, relatives, and society in general.
                  Using a helmet according to a standardized or in accordance with the rules of our own would be very menuntungkan as a user. When in transit or on the highway, you never know what will happen, at least we have something that is good practice for the common good. That is important, familiarize yourself with the rules, for good and will benefit many present there.

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