Backpack is a container or a place that is used in someone's back and protected by two straps that extend vertically through the shoulder, but there are also exceptions, for example, backpacks are made for lightweight objects usually requires only a rope. Backpack used in the wearer to make it easier to bring an innate dimau as needed. The technology used was specially formulated according to the needs of the wearer.
Backpacks are usually preferred over a handbag (clutch) for lifting heavy objects, because of the limited weight to lift heavy objects for a long time. Imagine if wearing a handbag (clutch) that rely on the ability of the hand to hold the load, it would not be able to and will be lame. Large duffel bag that can lift heavy loads up to 10 kg, which usually rely heavily most of their bodies, using the power of hip and left shoulder strength to stabilize the charge, because the hips are stronger than the shoulders, and adds balance.
History In ancient times, a backpack is defined to carry the catch of the hunters for easy travel. If the prey they catch the bigger, the hunter will share it, wrap it, then bring it. Her bag itself is made from various animal skins and stitched to create a solid container.
Design of Backpacks in general be one of four categories: no fringe, external edges, internal edges, and Bodypack. Frame pack, if any, functions to support the weight of the package and distribute its contents throughout the body is more precise and targeted, by moving most of the hips and legs. Most of the burden was not on the shoulder, reducing the likelihood of injury from shoulder strap pressure (many backpacks are equipped solely with a shoulder strap can affect the attitudes of people who carry more than 14 kg (30 lbs)), and limit range of motion of the upper body. Most backpacks are able properly sealed mechanism buckles, zippers, or the type of dry-bag closure although some models use a strap comes with a cable lock to the main compartment
Function
Backpacks in different forms of course indirectly represent the profession or activity that user. Therefore, implicitly communicating the backpack wearer's activities or professions.
For Activities of Daily
In many countries, the backpacks were identified to the students, and is the primary means of transporting materials to and from school education. In this context they are sometimes known as a school bag. Purchase a backpack according to fashionable, interesting, and useful is the ritual of back-to-school is important for many students. School backpacks generally lack the rigid periphery rather than a backpack for outdoor activities, and covers only a few pockets in addition to the main storage. While traditionally very simple in design, school backpacks are often made with padded shoulder straps and back as well as additional reinforcement to hold large numbers of heavy textbooks, as well as safety features such as reflective panels to make the wearer more visible packs at night. Bearing waist strap can also be given to distribute weight across the body. Backpacks are sometimes worn as fashion accessories, where they perform the same function as a purse. Some backpacks are designed specifically for women are not larger than a typical purse, and is usually associated with younger women.
For Specific Purposes
1. Backpack Camera Some backpacks are specifically designed to carry certain goods. Common examples include backpacks for small valuables such as laptops and cameras. Backpacks are designed to hold laptop computers in particular generally have a padded compartment to hold computer and medium-sized bag and cover to accommodate accessories such as cables and chargers cordless mouse / wired. In order to supply these devices with electricity, some high-end backpack equipped with solar panels. Some high-end retailers (notably Apple Stores) use the same design for their shopping bags.
2. Wheeled duffel bag is a backpack with wheels on the bottom and extending handle. Because of their design, this backpack reduces the strain on users, although the shoulder straps can be used to carry packages for short distances when the terrain is not suitable for wheels. Backpacks are the most commonly used when traveling by airplane or train.
For Professional Use
Backpack is a standard part of the burden of military equipment, especially infantry, in most countries, and military-style package regularly available to civilians in military surplus stores. Well-known examples include the U.S. Army ALICE pack the field and PLCE rucksack attachment, both of which are widely available to civilian markets both as actual military surplus (new or used) and as replicas. Packaging is often, though not always (eg the USMC's ILBE), a bag with an external periphery, with it's own innate tied or pinned to a metal or plastic carrying frame. For units that enter combat situations, the default may be loaded by weight and weighing over 100 lbs. Each soldier can carry additional weapons, ammunition, rations, medicines, tents or other shelter materials, and extra clothing. Many police tactical units, as well as players from the military style combat games such as paintball and airsoft, use military-style backpacks and webbing for storing equipment and ammunition. There is also a small but growing industry devoted to creating historical reproductions of military equipment; companies like generally produce the corresponding period uniforms and equipment other than a backpack. Some more recent military / tactical designs, especially Molle and ILBE package used by the U.S. armed forces, which are covered with webbing loop attachment points for increased carrying capacity.
For travel
Backpacks are sometimes used as luggage, mainly because of carry-on bag for plane travel. Backpacks are an essential part of the teeth of the outdoor trekker and the urban backpacker, allowing more mobility and compactness than would be available to someone carrying most of the equipment and clothing in the suitcase. Besides their use in outdoors pursuits, backpacks are sometimes used in other sports as well. Congenital hydration, sometimes used by athletes and military personnel, carry water (in the bladder or a rigid bottle) and has a tube connected to them from where the wearer can drink without removing the default; this feature is also included in some of the more common - purpose hiking backpacks. Backpacks that carry skateboards have also become more popular in youth culture.
