Patent ID: 7001002

Claim:
An enclosure for mounting expansion cards therein, each of the expansion cards comprising a bent portion, the enclosure comprising: a rear panel defining a plurality of expansion slots for receiving corresponding expansion cards, a pair of seats each defining a pivoting cutout being formed on the rear panel at one side of the expansion slots, the seats respectively located near two outmost expansion slots; and a retention device comprising two pivoting posts extending from two opposite ends of the retention device, the pivoting posts being pivotably received in the pivoting cutouts of the seats, the retention device comprising a pressing portion and a resilient portion is respectively located at an inner side facing the bent portions of the expansion cards by means of a locking device, wherein an opposing outer side of the retention device, wherein the retention device is pivotable between a first position in which the resilient portion elastically deformed to engage with the rear panel and the pressing portion presses against the bent portions of the expansion cards, and a second position in which the resilient portion is released from the rear panel and the pressing portion is free from the bent portions of the expansion cards.