Balanced co-located gimbal-based dual stage actuation disk drive suspensions

摘要

Various embodiments concern a suspension having a DSA structure on a gimbaled flexure comprising a loadbeam having a load point dimple and a flexure attached to the loadbeam. The flexure comprising a metal layer having a pair of spring arms, a tongue located between the spring arms, and a pair of struts. The struts connect the pair of spring arms to the tongue. One of the struts is located distal of the other strut. The pair of struts has a midline centered between the pair of struts. The suspension further comprises a motor mounted on the flexure. Electrical activation of the motor bends the pair of struts to rotate the tongue about an axis of rotation. The axis of rotation is aligned with the dimple. The midline is offset distally or proximally with respect to the axis of rotation. The offset counters a mass in imbalance of the tongue.

主权项

1. A suspension having a dual stage actuation (DSA) structure on a gimbaled flexure comprising:
a loadbeam having a load point dimple; a flexure attached to the loadbeam, the flexure comprising a metal layer, the metal layer comprising:
a pair of spring arms;a tongue located between the spring arms; anda pair of elongated struts, the struts spanning from the pair of spring arms to the tongue to connect the pair of spring arms to the tongue, wherein the longitudinal axes of the struts are parallel and offset with respect to each other, and the midline between the pair of struts is equidistant from the pair of struts; and a motor mounted on the flexure, wherein electrical activation of the motor bends the pair of struts to rotate the tongue about an axis of rotation, the axis of rotation is aligned with the dimple, the midline is offset from the axis of rotation and the dimple, the center of mass of the tongue is located one of distally or proximally of the axis of rotation, and the midline between the pair of struts is located the other of distally or proximally of the axis of rotation.