Rugged tablet PC achieves three-proof design
How does the rugged tablet achieve the three-proof design? In which fields is it applied? Many people may think that the design of the three-proof tablet is very simple, and it is nothing more than waterproof. In fact, this is only one aspect of the three-proof, and it does not represent the whole. Waterproof is only the entry threshold for a solid tablet.
Before designing a rugged tablet, the IP level that needs to be achieved must first be identified. Only when the requirements are identified can the designer start designing. It is difficult to require IP65 during design and IP67 during testing. After specifying the required IP level, the designer will make the structure according to the main board block diagram, stacking diagram, and industrial design drawings. When designing the structure, the three-proof tablet computer, dustproof, waterproof, and anti-drop characteristics must be considered.
In terms of dust prevention, the main consideration is that the three-proof tablet computer cannot enter harmful substances, which will affect the performance of the tablet computer if it cannot be used. This part is not very difficult. At present, the dust-proof defects of ordinary consumer tablet computers are in the exposed parts of various interfaces, mainly USB, headphone holder, etc., which are easy to receive fine particles such as dust immersion, which will affect the performance. The solid tablet PC is mainly dust-proof with a soft rubber plug design, which can effectively prevent fine particles such as dust from entering the solid tablet PC.
In terms of waterproofing, rugged tablet PCs can't do more split parts, different processes and different materials like ordinary consumer tablet PCs. On the one hand, it is because of the waterproof requirements, and on the other hand, it is also because of the cost, because the current mold for making a solid tablet computer often costs hundreds of thousands of dollars. The waterproof casing mainly uses a sealing rubber ring. The rubber ring is mostly made of silica gel with a temperature of about 35 degrees. Note that the silica gel should not be too hard. If the silica gel is too hard, there will be gaps after the upper and lower shells are assembled and pressed, which will make it impossible to waterproof. For interface waterproofing, there are different ways of device body waterproofing and structural waterproofing. Device waterproofing refers to the waterproofing of exposed interface parts such as USB and headphone sockets, which can save peripheral rubber plugs, but the cost is relatively higher, and the structural design is more difficult. big. The other is to deal with the waterproof structure, and make a waterproof rubber plug at the exposed interface position for protection. The rubber plug is generally made of TPU with a hardness of 80 degrees. Note that the hardness of TPU should not be too soft. If it is too soft, TPU is easy to deform and cannot be waterproof. In the design of the shell, the structural strength needs to be achieved, and the mechanical strength must be considered in the material used. The shape product matching parts should be as few and simple as possible, and the product design should avoid large arcs and multiple rows.
In terms of anti-drop, everyone knows that the display and touch screen are the most likely to be damaged when the tablet is dropped. The display is broken because of the space problem of the structural design. There is no reserved space at the four corners for buffering, and it is squeezed when the impact is dropped. display, resulting in damage to the display. When the touch screen is dropped, the cover is often damaged, which requires good structural protection in addition to a high-strength touch screen cover. The rugged tablet PC is designed with this feature in mind, so the touch screen cover is generally selected with high-strength Corning Gorilla Glass, which can resist impact up to 0.35J energy. At the same time, the four corners of the shell have TPU corner protectors, and the design of Liaoyuan Tongda Company has soft rubber protection on this periphery. This protects the touchscreen at any angle, preventing direct impact on the touchscreen in the event of a drop.
Speaking of the design of rugged tablet PCs, what are the main applications of rugged tablet PCs? In fact, the biggest difference between the rugged tablet and the consumer tablet is the difference in the application field. Rugged tablet computers should mainly be used in some special environments and special industries, which have high requirements for the protection of tablet computers. According to the functions and requirements, it is mainly used in: army, fishery, coal mine, petrochemical industry, surveying and mapping exploration, logistics and storage, industrial application, etc.