Key mounting and positioning device

The utility model provides a button installing and positioning device, which comprises a shell fixing piece and a button fixing device, the shell fixing piece is used for installing an appearance decorating part, the button fixing device is installed on the shell fixing piece, the button fixing device comprises a profiling block and a fixing block, the fixing block is fixedly connected to the shell fixing piece, and the profiling block is fixedly connected to the shell fixing piece. And the profiling block can be partially accommodated in the fixed block in a manner of moving relative to the fixed block, and the profiling block is used for placing the key and moves the key into the key hole of the appearance decorating part by moving relative to the fixed block. According to the button installing and positioning device, the shell decorating part is installed on the shell fixing part, the button is placed on the profiling block and moves into the button hole of the appearance decorating part along with the but