US Patent 10123439 Cover and electronic device

An electronic device includes a casing, an electronic assembly and a cover. The casing has an interior space. The electronic assembly is located in the interior space. The cover includes a first covering member and a second covering member. The first covering member is disposed on the casing, and covers the interior space. The second covering member has a sign, and the second covering member is rotatably disposed on the first covering member in order to change the position of the sign.