Printed circuit board cover

摘要

A sheet metal cover for a printed circuit board (PCB) includes a plurality of legs continuous with a substantially planar elevated section. The legs are attached to the PCB, and electrical connections are provided between the legs and an internal ground plane of the PCB at the attachment locations. The sheet metal cover is thereby grounded, inhibiting the transmission of electromagnetic signals through the sheet metal cover. The elevated section of the sheet metal cover prevents select electronic devices on the PCB from being viewed or probed. Openings through the sheet metal cover allow heat sinks or heat generating electronic devices (e.g., inductors) to be exposed through these openings, thereby facilitating cooling of these elements by airflow. An electrically conductive gasket attached to the underside of the elevated section may contact the heat sinks, further minimizing the radiation of EMI emissions.

主权项

1. A system comprising:
a printed circuit board having a first set of one or more electronic devices mounted thereon; a sheet metal cover that includes a plurality of legs and an elevated section, wherein the plurality of legs and the elevated section are formed from a continuous piece of sheet metal, wherein the plurality of legs are coupled to the printed circuit board, and wherein the elevated section is positioned over the first set of one or more electronic devices when the plurality of legs are coupled to the printed circuit board; an opening in the elevated section of the sheet metal cover, wherein an element attached to the printed circuit board extends through the opening; and an electrically conductive gasket that contacts the sheet metal cover and the element that extends through the opening in the elevated section of the sheet metal cover, wherein the gasket extends partially into the opening in the elevated section of the sheet metal cover.