Patent ID: 6683792
Filing Date: 2004-01-27
Classification: H04Q,H05K

Abstract:
A communication apparatus comprising:a shelf formed of metal, said shelf having a pair of side plates; a back wiring board mounted in said shelf on the back side thereof, said back wiring board having a plurality of first connectors and a solid ground pattern; an upper guide plate mounted in said shelf on the upper side thereof, said upper guide plate having a plurality of guide rails and a plurality of vent holes; a first shield board mounted on said upper guide plate, said first shield board having numerous openings; a lower guide plate mounted in said shelf on the lower side thereof, said lower guide plate having a plurality of guide rails and a plurality of vent holes; a second shield board mounted on said lower guide plate, said second shield board having numerous openings; a plurality of plug-in units mounted in said shelf so as to be inserted along said guide rails of said upper guide plate and said guide rails of said lower guide plate, each of said plug-in units having a printed wiring board, a second connector mounted on said printed wiring board and connected to one of said first connectors, a front structure fixed to the front end of said printed wiring board, said front structure having an upper surface, a pair of side surfaces, and a lower surface, and a first conductive gasket continuously mounted on said upper surface, one of said side surfaces, and said lower surface of said front structure; and a second conductive gasket mounted on one of said side plates of said shelf; said second conductive gasket being in close contact with said front structure of one of said plug-in units adjacent to said one side plate of said shelf, said first conductive gasket of said one plug-in unit being in close contact with said front structure of another one of said plug-in units adjacent to said one plug-in unit or in close contact with the other side plate of said shelf, thereby realizing electromagnetic shield on the front side of said shelf; said first shield board realizing electromagnetic shield on the upper side of said shelf; said second shield board realizing electromagnetic shield on the lower side of said shelf; said ground pattern of said back wiring board realizing electromagnetic shield on the back side of said shelf; said side plates of said shelf realizing electromagnetic shield on the right and left sides of said shelf.