Patent ID: 8351212

Claim:
A mainframe structure, comprising: a housing, said housing comprising an accommodation chamber defined therein, a front opening located on a front wall thereof in communication between said accommodation chamber and the space outside said housing, a plurality of flanges disposed around said front opening on one same plane, and a plurality of stop members respectively disposed at two opposite lateral sides in said accommodation chamber at one same elevation relative to said flanges; a circuit module accommodated in said accommodation chamber, said circuit module comprising a main circuit board; and a cover mounted in said front opening and stopped against said flanges and said stop members, said cover comprising two slots symmetrically disposed two opposite lateral sides thereof, two lugs respectively backwardly extended from the two opposite lateral sides adjacent to said slots and two handles respectively mounted in said slots and respectively pivotally connected to said lugs and biasable to stop against said stop members and to force said cover forwardly away from said housing, each said handle comprising a base portion respectively inserted into each said slot, a connection portion backwardly extended from said base portion and pivotally connected to each said lug, a grip portion extended from one end of said base portion and an actuation portion extended from an opposite end of said base portion for stopping against each said stop member.