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All around the world, about 5/1000 people are blind. It is very dangerous for them to touch the power outlet, because they need to feel the jack with hands before plug it in.
A design of additional protective sleeve was inspired by jigsaw. In this way, it does not only protect the blind from getting an electric shock, but also leave other people’s use unaffected .
The protective sleeve is made of PE, an insulation and most common material. In this way it can reduce the price of the product.
Beijing Forestry University