Patent ID: 6876516

Claim:
A disk drive for a disk cartridge which includes a magnetic disk, said disk drive comprising: (i) a main frame; (ii) a cover opposite to said main frame; (iii) a main board placed between said main frame and said cover and fixed to said main frame; (iv) a head assembly placed between said main frame and said cover and movable in a radial direction of said magnetic disk, wherein said head assembly comprises: an upper head supporting member which is connected to said main frame and adjacent to said cover, and which includes an upper arm; an upper magnetic head supported by said upper head supporting member; a lower head supporting member connected to said main frame and adjacent to said main frame; and a lower magnetic head supported by said lower head supporting member; (v) a disk receiving/ejecting mechanism placed between said main frame and said cover and coupled to said main frame for receiving and ejecting said disk cartridge, 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 (vi) a reinforcing system coupled to said head assembly for inhibiting an internal collision in said head assembly even when said disk drive is subjected to a mechanical shock, wherein said reinforcing system comprises: a butting cart extending from said upper arm of said head assembly towards said cover; 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.