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Structure of VCM attachment for HDD

IP.com Disclosure Number: IPCOM000013394D
Original Publication Date: 2000-Feb-01
Included in the Prior Art Database: 2003-Jun-18

Publishing Venue

IBM

Abstract

This article discloses a structure of the Hard Disk Drive. The VCM magnet assembly is fixed by screws through the cover fixed into the lower yoke. The lower yoke has screw holes to accomodate this. In the previous structure, the screws were fixed to the base, resulting in large distorsion of the base. In the invented structure, the screws are fixed to a steel yoke, therefore any deformation of the base is avoided. Usually in a HDD, the VCM size is maximized to gain seek time. Base castings can be very thin in the VCM area. Also, as shown in the figure below, the holes in the yoke can be made smaller. This helps the yokes carry more flux and improving the VCM's efficiency and reducing leakage flux. The invented strucure also shows low acoustics in seek mode since the VCM is firmly fixed to the base and cover. Invented Structure Conventional Structure