| 摘要 |
A modular enclosure for personal computer systems substantially comprises a 5-sided steel chassis, a plastic subassembly tray, a plastic detachable back panel, and a 4-sided plastic top cover including an integrally formed front panel. The internal subassembly tray comprises appropriately formed bays designed to receive various system subassemblies, each bay having an integrally formed subassembly retaining means to bear against and retain a subassembly placed in the bay. Top side and rear electromagnetic interference (EMI) shields are fitted and secured to the interior portions of the plastic topcover and rear panel so as to peripherally contact the chassis when the topcover and rear panel are installed. The internal subassembly tray is lowered into the interior region of the chassis and snapped into place at the front portion thereof. The rear panel is then positioned and secured to the chassis. A plurality of subassemblies, including disk drives and main circuit board may be secured in the subassembly tray and chassis, and interconnected via an appropriately sized subassembly and main cable bundles. Front EMI shields are snapped in place onto the chassis. Tab members disposed in the lower front edge of the topcover assembly are positioned into tab-receiving slots in the lower front edge of the chassis. The topcover assembly is rotated downward until the top side EMI shield contacts the top rim of the steel chassis, and thereafter secured onto the base assembly by engaging large cover-mounting snaps, formed in the top cover, into complimentary hooks formed in the rear panel secured to the rear portion of the chassis-tray assembly. Line power to a power supply is switchably engaged by a frontally disposed button on the topcover assembly through an actuator to an internal power supply switch.
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