Patent ID: 7697238
Filing Date: 2010-04-13
Classification: G11B

Abstract:
1. A magnetic disk drive comprising: a base; a spindle motor secured to said base; a magnetic disk coupled to said spindle motor; a carriage mounted on said base; a suspension supported by said carriage, wherein said suspension has a lift tab at a front end thereof; a magnetic head mounted on said suspension via a flexure; and a ramp mechanism pivotally mounted on said base, wherein, when said magnetic head is to be loaded/unloaded, said ramp mechanism moves to a position at which said magnetic head is to be loaded/unloaded, and when read or write operations are to be conducted on said magnetic head, said ramp mechanism moves to an exterior of said magnetic disk, wherein said ramp mechanism has: a support section; a first protruding section that protrudes from said support section, wherein said first protruding section includes fins, each of which has, in addition to an inclined surface at a front end extended in a direction of said magnetic disk, an unloading guide surface of the lift tab; and a constraint plate for the lift tab, wherein the constraint plate protrudes from said support section and faces the unloading guide surface, and wherein said ramp mechanism further has a second protruding section protruding from said support section and formed with a guide groove which engages with a guide member secured to said base, said second protruding section being pressed firmly against a stepped surface of the guide member.