Moisture proof plug blade

摘要

A plug blade includes a front section and a rear section. The rear section has a through-hole extending from a first face of the rear section through a second face of the rear section opposite to the first face. An insulating laying is formed on the rear section by injection molding and fills the though-hole of the rear section of the plug blade. The insulating layer includes a flange that abuts against an inner face of an inner frame during a procedure for forming a housing of a plug, thereby preventing moisture from entering an interior of the housing of the plug.