Shielding device

摘要

A shielding device comprises a top cover and a frame. The top cover comprises a body portion with a plurality of holes being formed in the body portion. A plurality of flanges extends downward from outer edges of the body portion. A dome shaped projection is formed in a central portion of each flange. The frame comprises a narrow top wall and a side wall depending downward from outer edges of the top wall. An engaging portion in the form of an elongated groove depressed inwardly is formed in the side wall for detachably engaging with corresponding dome shaped projections to the top cover.