Multifunctional enclosure for wiring board in display

Claim 1

An enclosure for a video-amplifier printed wiring board to be located in close proximity to, and structurally separated from a cathode ray tube connector base in a video display terminal wherein the enclosure combines the functions of a structural support for the board on the display's chassis, of an EMI/RFI shield for the board, and of an expanded heat transfer-surface heatsink serving high heat-dissipation components on the board, said enclosure comprising: (a) a one-piece body member of a thermally and electrically conductive material defining a cavity surrounded by a bottom wall, side walls adjacent to said bottom wall, and an open side opposite to said bottom wall, said body member including integral mounting means for coating and structurally supporting the video-amplifier printed wiring board in said cavity with the high heat-dissipation components thereof facing, in close proximity, the inner surface of said bottom wall and connected thereto in a thermally conductive manner, the outer surface of sad bottom wall having integral, heat-dissipated fins forming an expanded heat-transfer surface heatsink, said bottom wall having an opening through which the cathode ray tube's connector base protrudes into close proximity with the video-amplifier printed wiring board, the cathode ray tube being connected to the video-amplifier printed wiring board by flexible electrical wires transmitting substantially no mechanical load to the cathode ray tube's base, the cathode ray tube forming with respect to the edges of said opening a clearance of a magnitude which prevents substantially all mechanical loads from the enclosure from being transmitted to the cathode ray tube; (b) means for closing said open side of said body member to form an EMI/RFI-tight enclosure about said cavity; and, (c) means for supporting said body member on the chassis of the video display terminal.