Patent ID: 8792249

Claim:
A waterproofing structure of a mobile terminal, the waterproofing structure comprising: an annular groove that surrounds an outer edge of an open portion of a cavity of the mobile terminal, said annular groove forming a gap between two side wall surfaces of the groove, each of the two side wall surfaces provided immediately adjacent the gap; and a waterproof lid that covers an entirety of the open portion of the cavity and seals the cavity to form a waterproof cavity, wherein the waterproof lid is removable and includes: a main body portion, an inner flat portion extending substantially along a same plane as the main body portion, an annular protrusion extending substantially perpendicular to the inner flat portion and extending into the gap formed by the annular groove and in between the two side wall surfaces, and an elastic resin portion that covers an entirety of an outer surface of the annular protrusion and the inner flat portion, the elastic resin portion configured to be in press-contact with only one of the two side wall surfaces of the annular groove when the annular protrusion and elastic resin portion are disposed in the annular groove, wherein the two side wall surfaces of the annular groove include an inner side wall surface and an outer side wall surface, and the elastic resin portion being positioned to press-contact and adhere to the outer side wall surface and being separated from the inner side wall surface by a predetermined gap.