Backpack structure of mountaineering backpack

In 1997, I published an article titled "Also Talking about Mountaineering Bags" in Beijing's "Travel" magazine, which for the first time proposed the concept that mountaineering backpacks are structurally divided into three parts - —That is, the backpack system, the loading system and the plug-in system. Later, many articles followed this formulation, and practice proved that this division was reasonable and accurate. The three major parts perform their own duties and share different responsibilities.

Backpack system: The function of the carryback system is to ensure load-bearing and carrying comfort.

The structure includes shoulder straps, chest straps, waist belts, shoulder straps, bottom straps, support devices, ventilation devices and adjustment devices (referred to as five belts and three devices). The carrying system is the core of the technological content of a backpack. The biggest difference in the performance of a backpack lies in the carrying system. The carrying system of a mountaineering bag with good performance is not only designed to consider ventilation, but also facilitates gravity transmission, has strong load-bearing capacity and is comfortable.

Perfect carrying is achieved through gradual development. In the early days, common backpack support devices included U-shaped tubes and double aluminum bars; improved backpacks used “∏”-shaped aluminum sheets and touch panels for support, and were shaped according to the body curve; in order to improve backpack performance, at the end of the 20th century, European backpack manufacturers Invented the "TCS" backpack system. This backpack is supported by an alloy tube frame and is shaped using high-strength and high-elastic titanium alloy tubes, which greatly reduces the weight of the material and makes it stronger and more balanced. Its large volume The backpack is equipped with lumbar support to make the load-bearing force more integrated. In order to solve the problem of looking up while traveling, the system is designed with a recessed headrest. In order to adapt to different body types and personalities of the carriers, the lumbar fulcrum cushion of some backpacks can be opened and a pad is added inside, which can solve the problem of weak connection between the stress point and the lumbar fulcrum for those with thin buttocks. The humanized design makes the "TCS" backpacking system top the European mountaineering bag backpack performance evaluation for six consecutive years, and is known as the "intelligent backpacking system."

The ventilation device of the backpack system is an important indicator of the comfort of the backpack. Manufacturers usually use soft breathable materials to bulge, design the shoulders into shaped cushions, and install an adjustable breathable cushion at the lumbar pivot point to make the back Saddles are formed longitudinally and transversely, thereby improving ventilation.

The backpack system adjustment device is developed based on the fixed device. The fixed structure can only adapt to a specific height and is very inconvenient to use. Therefore, the manufacturer developed an adjustable backpack (generally common in European bags). ). Adjustable backpacks are divided into upward-adjustable and downward-adjustable backpacks: the upward-adjustable backpack generally has a step adjustment at the root of the shoulder strap, while the downward-adjustable backpack has an adjustment device installed in the middle of the waistband. Although these two types of adjustment methods can adjust the distance of the back according to the shape of the wearer, But subject to certain restrictions. In order to solve this contradiction, the manufacturer developed the infinitely adjustable waist-shoulder connection, which completely overcomes the limitations of the first two adjustment methods. The wearer can adjust it to the appropriate position according to personal needs to find the best feeling. There are still some brands that use fixed structures (common in American bags). They think fixed structures are more stable and use different sizes from S-L to adapt to height.

The five-belt function of the backpack system is to ensure the reliable combination of the backpack and the human body, ensure correct force transmission and assist in load-bearing. Its materials, craftsmanship, and design directly affect the comfort of carrying it. In order to ensure shoulder comfort, the manufacturer invented the "S" shoulder strap, so that the shoulder strap can open the neck and not block the shoulder socket. The material is molded at high temperature to form a multi-layer bubble film and the elastic Lycra outer layer makes the shoulder strap more comfortable. The pads are soft and comfortable; the shoulder straps are connected through the whole body, which not only ensures the adjustment of the center of gravity of the backpack, but also meets the load-bearing requirements; the chest strap is a small part of the backpack system, but it is not an insignificant part. The main function of the chest strap is to adjust The distance between the double shoulder straps enhances the stability of the backpack and facilitates breathing; the waist belt is the load-bearing part of the backpack, usually composed of a lumbar pad and a waist belt. It adopts a movable design. The belt is fixed at the bottom of the backpack with nylon stickers. After being removed, it can be finely adjusted up and down to adjust Find the best combination point; backpack waist bottom adjustment straps are divided into single straps and double straps. Professional backpacks are all double strap adjustments and cross-stressed, ensuring a reliable combination of the bottom of the backpack and the lumbar support and waist.

The structure of the backpack loading system is generally not too complicated, and usually consists of a main bag, a top bag, a side bag, and an additional bag. The main bag mostly adopts the upper and lower layered type, that is, there is an opening at the upper end and the middle, and a movable partition in the middle, which can be connected or disconnected. Its advantage is that the user can separate items according to needs, and can take out the upper and lower parts. The backpack top bag is also called a head bag. It is located on the top of the backpack. It has a single bag structure or a double bag structure. It is very convenient to store some small items. Side bags are also called ear bags, which look like two ears on both sides of the backpack. For the convenience of external hanging, some bags do not have side bags or use hidden side bag designs, and some use movable side bag designs that can be installed at any time during use. It can be removed when using the plug-in. Accessory bags refer to small bags that are attached to the outside of the main bag and are attached to the front or side of the backpack to facilitate packing of items. Some accessory bags can be removed and used separately.

Although the function of the loading system is to load items, whether the design is scientific or not also directly affects comfort and force transmission. For example, the double "V" shape design concept of the backpack is to draw on the force principles of Nepali backpacks and Portuguese wine barrels, and design the supporting brackets into a "V" shape with a large top and a small bottom. The main bag of the backpack is also designed to have an upper shape. The main purpose of this design is to transfer gravity reasonably.

Plug-in system: The function of the backpack plug-in system is to increase the number of items carried and to facilitate the attachment of irregular items.

For a professional mountaineering bag, a plug-in system is essential. The external hanging system of the backpack can be divided into top hanging, side hanging, back hanging, bottom hanging, etc., usually using point fixing or strip fixing. The point-hanging type generally has one or two sets of corresponding hanging points, and is tied and fixed at four points when in use. The strip-hanging type usually installs two rows of external hanging strips on the front of the backpack, each with several fixed points. The fixed items are more random and less affected by the shape. The design of professional backpacks has many unique features, such as long and short ice ax hanging points at different heights; small pockets for holding side hanging items; unique crampon fixing structure and high-strength anti-puncture synthetic leather pads; making the external hanging system It is both convenient and durable in use. This rational design derived from practice ensures the backpack’s perfection in terms of load-bearing capacity. Reasonable use of the external plug-in system can double the capacity of your backpack.