Browse Prior Art Database

Universal Suspension Flexure for Read/Write Heads in Disk Files

IP.com Disclosure Number: IPCOM000034761D
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 70K

Publishing Venue

IBM

Related People

Watrous, RB: AUTHOR

Abstract

Typical disk file data head suspension systems, such as that described in U.S. Patent 4,167,765, consist of a load beam, a flexure, and a slider, wherein the slider supports the read/write head. As designed for a linear actuator, the flexure has a high radial stiffness in the accessing direction, moderate stiffness in the tangential direction (i.e., at right angles to the accessing direction), and low pitch and roll stiffness. Often these same suspensions are used with "in-line" rotary actuators. This results in an exchange of the radial and tangential stiffnesses, so that the stiffness in the accessing direction (Image Omitted) is only moderate and the orthogonal stiffness is unnecessarily high. This invention is a universal suspension flexure for both linear and rotary in-line actuators. As shown in Figs.

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Universal Suspension Flexure for Read/Write Heads in Disk Files

Typical disk file data head suspension systems, such as that described in U.S. Patent 4,167,765, consist of a load beam, a flexure, and a slider, wherein the slider supports the read/write head. As designed for a linear actuator, the flexure has a high radial stiffness in the accessing direction, moderate stiffness in the tangential direction (i.e., at right angles to the accessing direction), and low pitch and roll stiffness. Often these same suspensions are used with "in-line" rotary actuators. This results in an exchange of the radial and tangential stiffnesses, so that the stiffness in the accessing direction

(Image Omitted)

is only moderate and the orthogonal stiffness is unnecessarily high. This invention is a universal suspension flexure for both linear and rotary in-line actuators. As shown in Figs. 1A and 1C, a suspension consists of a flat flexure 10 with one end attached to a load beam 12 and the other end attached to a bracket 14. The bracket 14 is attached to a slider 16. The suspension system of Figs. 1A-1C is for a linear actuator since the actuator motion is colinear with the long axis of the load beam 12, as shown in Fig. 1C. The same suspension is shown in Figs. 2A, 2B and 2C. This suspension is for a rotary in-line actuator, as shown by the accessing direction in Fig. 2C, and has the slider 16 rotated 90 degrees from the attachment of Fig. 1C. The figures show two subassemblies. Ho...