We all know that design serves consumers, and the source of design is the needs of the market and consumers.

Another situation is that domestic manufacturers, some manufacturers or processing plants like to copy European and American designs and products.

If a person is inert, he will take a shortcut and eventually be tired of it.

Appearance difference of bicycle bag

For example, the appearance and structure of bicycle bag.

As shown in the figure above, the basic functions are available, but there is no design on the front panel, and there is no sign or reflective tape. This is a semi-finished product.

There is no d-buckle on the side, so we can't carry it on one shoulder. This is a simplified version.

As shown in the figure above, we have all the basic things, but there is a front bag in the front design, and a non waterproof zipper is used as the opening.

Why is it so designed? In fact, it is not necessary. For those who use side hanging bags, their valuables will not be placed on the back rack hanging bag in the blind area of view.

Moreover, in any case, the rider must have a front hanging bag on his car. That's the perspective. It's a safe area. There is no rear hanging bag,

You can't do without the front hanging bag, beam bag and triangle bag. Therefore, the side hanging bag is designed with a small front bag, which has very little significance. In addition, the zipper of the small front bag is relatively short, which can hold up to some items such as mobile phones, power stores and licenses. As for larger items such as shoes and clothes, it is difficult to put them down.

Moreover, the zipper is water proof. Note that it is water proof. It relies on the surface glue of the zipper to block the rain. It is easy to fall off under the repeated test of the hot sun or cold winter. It can't stand the test. It may become a burden due to the damage of the zipper in a long-distance attack.

The best way is to get some plug-ins that can store wet shoes, clothes, or helmets. Simple design may be the guarantee of practicality and durability.

As shown in the following figure:

Relatively practical and reasonable, allowing users to maximize their use value is a good design, right? The way of dry and wet sharing is to hang out, let wet clothes or dirty shoes hang out of the bag, so as not to dirty other clean clothes. The elastic rope type external hanging can also hang large volume items such as helmets.

Full waterproof bicycle bag

The fully waterproof bicycle pack has obvious advantages, that is, it is scratch resistant, wear-resistant and waterproof. It won't get into the water for too long. The advantage of the rolling mouth type is that it is completely isolated from water. As long as the rolling mouth is correct, the piggy bag will not seep into the water tank. However, you can't have both fish and bear's paw. The disadvantage of the rolling mouth type is that it is relatively troublesome to take things. Therefore, riders need to think about the arrangement of luggage. The infrequently used luggage is placed on the bottom floor, and the frequently taken luggage is placed on the top. If you ride for a long distance, this trouble is worth bearing. After all, the strong waterproof performance is standard under the changing weather and the situation of wind and rain. In addition, the piggyback bag is responsible for the storage of most of the luggage, but other small bags can be hung on the bicycle. This kind of small bag can store urgent and commonly used objects, so the function of waterproof piggyback bag is a little simpler.

Fabric of bicycle bag

In any case, wear-resistant and scratch resistant fabrics can deal with all kinds of scratches and accidents, and ensure the integrity of bags. The choice of fabrics has become the top priority. For example, for scratch resistance, the d number of the fabric must be guaranteed. The middle of the double-sided adhesive surface is a grid or thick line stripe, which is a solution.

In addition, the polar environment of high temperature, heat and low temperature freezing should be considered. Normally, there are few cycling under the temperature of 50 degrees, but there are a lot of snow cycling. However, it is not recommended to use a bicycle pack when the outdoor temperature is lower than - 20 degrees. There are great risks in long-distance travel and cycling under excessive temperature. Generally speaking, there are two kinds of fully waterproof materials, one is PVC mesh cloth, and the other is nylon bonded TPU. The cold resistance of the former is - 20 degrees, and the latter is about - 40 degrees. While the melting point of PVC mesh cloth is low, generally about 60-70 degrees. The melting point of nylon bonded TPU is higher, generally above 90-100 degrees. Therefore, nylon bonded TPU fabric is more durable in polar environment. However, the service life of PVC fabric is much slower at room temperature, because it is more durable.

Bicycle bag buckle

The buckle of the bicycle pack is very important. A stable pack is a necessary guarantee for long-distance riding. If something goes wrong on the way, it will affect your mood and cause accidents. For example, when the buckle is broken and cannot be repaired, you can only bind the pack with a rope, which will bring a continuous large amplitude, which greatly affects the mood and accelerates the loss of energy.

Positioning buckle, positioning buckle and hanging buckle constitute the whole fixing system, that is, three points can fix a plane, two hanging buckle points plus one positioning buckle point at the lower part to form a triangle. Both the hanging buckle and the positioning buckle can be adjusted. The large one is applicable to all kinds of models, and most models can be matched, which greatly improves the use efficiency of the piggyback bag.

The firmness of the hanging buckle and positioning buckle determines the hanging level of the pack. At present, there are many ways to hang the buckle, all of which are rotary hook mode, either metal or injection molding, or external hook type, or reverse hook type. However, as long as the transmission point of bearing force is weak when the vehicle vibrates during driving, there will be hidden dangers. Therefore, in the design, how to avoid risks and strengthen the weak links of design is a necessary level for excellent fasteners. The second generation of dragon claw is an injection molding buckle with reverse hook mode. In this regard, a relatively complete design improvement has been made to enhance the practical value of the fastener.