The main materials of the hard Trolley bags case are ABS, PC, PP, aluminum-magnesium alloy, etc which are pressure-resistant, wear-resistant, and effectively protect the items in the case. It is now the mainstream choice. In the hard case, PC material is better.Taking into account the impact resistance and weight, ABS has poor impact resistance, PP is a relatively outdated material, magnesium aluminum alloy, the price is relatively high, and the weight is relatively large. The soft box is mainly made of canvas, EVA, nylon, leather, etc. It is exquisite in workmanship and light in weight, but it is not good for the protection of the items in the box, so it is generally not recommended to be used as a checked box.

 

Universal wheel, zipper, and pull rod, although these three parts are inconspicuous, they have a great impact on the experience of using the box. Generally speaking, if you choose products from big brand stores, not only the quality of these small parts is guaranteed, And regular brand products generally provide three to five years of warranty. The optional trolley case can be selected according to the size of the trolley case. Look at the scroll wheel. The roller of the trolley case directly determines the quality of the trolley case. During the journey, if the roller is broken, it will not only affect our entire trip, but also bring us a lot of trouble. Therefore, when we choose a trolley case, we must test the stability of the rollers, whether there is noise.

Look at the lever. The larger the capacity of the trolley case, the stronger the load-bearing capacity of the trolley. In order to prevent the rod from being damaged, it will bring unnecessary trouble to the journey. The editor recommends that when purchasing a trolley case, be sure to pull out the tie rod and test it, and try to choose a thickened stainless alloy tie rod, which is highly resistant to bending. Is it normal for the rod to shake left and right? It is normal for the rod to shake, unless you want the steel welded to not move at all. The world famous box trolley has such a problem.The spring button connected between the pull rod and the pull rod. There should be a gap between the large tie-rod tube and the small tie-rod tube, otherwise the two tie-rod tubes are too tight to be pulled out.

There is a plastic ring covering the connection between the built-in pull rod and the spring, which also plays a stabilizing role. Therefore, it is normal for the lever to shake within a certain range. Why is the hard case generally not as bright as the picture? After buying a hard case, many people think that the real thing is not as bright as the photo of the merchant. This is because generally a layer of transparent film is attached to the surface of the case when the hard case leaves the factory, in order to prevent damage to the surface of the case during the production process and transportation process.The tearing of the film is generally carried out from the opening of the box, and the brightness of the picture can basically be achieved after tearing the film. Trolley cases are commonly used because of their ease of use.