1 purchase PC trolley bags, should be based on individual needs to buy the right size, fabric products. Most of the hard case with high temperature, wear resistance, impact resistance, waterproof, compressive characteristics of the hard shell material to protect the contents from extrusion and impact, but the disadvantage is the built-in capacity fixed. Softbox users can use more space, and most of the light weight, toughness, beautiful appearance, more suitable for short trips. (For more details, please pay attention to "PC trolley space is not big enough?") 2. Trolley bags easy to damage in the use of the rod, take the wheel and the handle, the purchase should focus on checking these parts. Consumers can choose to pull the bar without bending over the length of the selection criteria to repeatedly retract the rod dozens of times, the rod is still pull smooth, pull the lever to switch the normal switch to test the quality of the rod. Check the box to go round, you can put the box upside down, the wheels leave the ground, hand wheel, make it idling, wheel rotation to be flexible, wheel and axle with tight, box wheel should choose rubber material, Low noise and wear. Mostly put the plastic parts, under normal circumstances, good quality plastic has a certain toughness, poor quality plastic hard, brittle, prone to fracture in use. 3. Buy soft case, we must first pay attention to whether the zipper is smooth, with or without teeth, misplaced, stitching the stitch is straight, the upper and lower line should be consistent, no empty needle, jumper, the general box corner, corner easy There are jumpers. Second, to see the box, the box surface is disabled (such as fabric warping, jumping, cracking, etc.), trolley, take the wheel, box locks and other accessories inspection methods and buy the same way the suitcase. 4. Choose well-known businesses and brands. Good general quality luggage more attention to detail, color with appropriate, neat stitching, the pin length uniform, there is no thread exposed, flat fabric flawless, no bubbling, no exposed edges, metal parts bright. Choose a well-known merchants and brands have a better after-sale protection. 5. Check the label logo. Regular manufacturers of products should be marked with the product name, product standard number, model specifications, materials, production unit name and address, inspection identification, telephone number and so on. Some PC trolley case will be thickened in every corner of the trolley case or with different hard materials designed to protect your suitcase from knocking; similarly, there will be some additional cushions on the surface of the box Separate the trolley case from the ground to prevent the trolley case from being scratched. If the service life of the PC trolley case has a higher demand, select the product can focus on whether there is anti-knock design.