Waterproof structure of electronic device

A waterproof structure of an electronic device, the waterproof structure comprising:

• a box, comprising a housing and an inner frame, an opening disposed on the housing, the inner frame arranged in the opening, a groove extended along an inner periphery of the opening, the groove extended in a closed curve manner, an outer through opening defined on an external surface of the box communicating with the groove, an inner through opening disposed on the groove communicating with an internal space of the box;
• a cable, comprising an outer baffle and an inner baffle respectively corresponding to the outer through opening and the inner through opening, the cable penetrating the box through the outer through opening and the inner through opening, and the outer through opening and the inner through opening respectively closed by the outer baffle and the inner baffle;
• a sealant, filled in the groove;
• and
• a cover, covering the opening and closing the groove.