Patent ID: 6873493

Claim:
A disk drive for a disk cartridge which includes a magnetic disk, said disk drive comprising: a main frame; a cover opposite to said main frame; a main board placed between said main frame and said cover and fixed to said main frame; a disk receiving/ejecting mechanism placed between said main frame and said cover and coupled to said main frame for receiving and electing said disk cartridge; a head assembly placed between said main frame and said cover and movable in a radial direction of said magnetic disk; and a reinforcing system coupled to said main frame, said main board, and said disk receiving/ejecting mechanism for resisting an external stress applied between said main frame and said cover so as to protect said head assembly; wherein said disk receiving/ejecting mechanism comprises: an eject plate coupled to said main frame for ejecting said disk cartridge; and a disk holder coupled to said eject plate for holding said disk cartridge, and wherein said reinforcing system comprises: a supporting part connected to said main frame and standing up towards said cover; a standing member connected to said main board and standing up towards said cover; and a cut-and-raised part formed on said disk holder and standing up towards said cover.