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

A suspension having a 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;
• a pair of struts, each strut comprising a first end connecting to a respective one of the pair of spring arms and a second end connecting to the tongue, one of the struts located distal of the other strut, the pair of struts having a midline centered between the pair of struts, wherein the pair of struts are the only part of the metal layer that connects between the pair of spring arms and the tongue;
• 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, and the midline is offset distally or proximally with respect to the axis of rotation.

A suspension having a 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, the tongue comprising a slider mounting;
• a pair of struts, the struts connecting the pair of spring arms to the tongue, the pair of struts comprising a first strut and a second strut located distal of the first strut, wherein the pair of struts are the only part of the metal layer that connects between the pair of spring arms and the tongue;
• and
• a motor mounted on the flexure, wherein electrical activation of the motor bends the pair of struts to rotate both the tongue and the slider mounting about an axis of rotation, the first strut is located a first distance proximally of the axis of rotation, the second strut is located a second distance distally of the axis of rotation, and the first distance is different than the second distance.