Hard disk drive gimbal design with high torsion frequencies
A trace gimbal is described herein. In some embodiments, the trace gimbal includes outer struts including a front outrigger at a distal end of the trace gimbal and a rear outrigger at a proximal end of the trace gimbal. The front outrigger includes a distal front outrigger and a proximal front outrigger, and the rear outrigger includes a distal rear outrigger and a proximal rear outrigger. The trace gimbal further includes a middle strut extending in a width direction of the trace gimbal and adjoining the proximal front outrigger to the rear outrigger, and an inner strut connecting the middle strut to a slider tongue. The inner strut and the middle strut adjoin the outer gimbal struts to the slider tongue.
1. A trace gimbal comprising:
outer struts including a front outrigger at a distal end of the trace gimbal and a rear outrigger at a proximal end of the trace gimbal, the front outrigger including a distal front outrigger and a proximal front outrigger, the rear outrigger including a distal rear outrigger and a proximal rear outrigger, wherein a length direction of the trace gimbal is defined as a direction extending from the proximal end to the distal end;
a middle strut extending in a width direction of the trace gimbal orthogonal to the length direction and extending towards a slider tongue, the middle strut including a first end that adjoins to both an end of the proximal front outrigger and to an end of the rear outrigger and a second end adjoining the middle strut to an inner strut; and
the inner strut extending toward the proximal end from the middle strut to the slider tongue.
2. The trace gimbal of claim 1 , comprising at least one microactuator mounted on the slider tongue, the inner strut supports the slider tongue.
3. The trace gimbal of claim 2 , wherein the proximal front outrigger includes a first cross-section and the distal front outrigger includes a second cross-section, and a width of the second cross-section width is about a same dimension as the first cross-section of the proximal front outrigger.
4. The trace gimbal of claim 3 , wherein the first cross-section and the second cross-section of the front outrigger is between 0.01 millimeters and 0.10 millimeters.
5. The trace gimbal of claim 3 , wherein a cross-section of the middle strut is equal to the first and second cross-sections of the front outrigger.
6. The trace gimbal of claim 1 , wherein the distal rear outrigger includes a first cross-section and the proximal rear outrigger includes a second cross-section larger than the first cross-section.
7. The trace gimbal of claim 6 , wherein the first cross-section of the distal rear outrigger is between 0.01 millimeters and 0.10 millimeters.
8. The trace gimbal of claim 1 , wherein the front outrigger and the middle strut form a C-shape or a U-shape.
9. A suspension comprising:
a trace gimbal including outer struts including a front outrigger at a distal end of the trace gimbal and a rear outrigger at a proximal end of the trace gimbal, wherein a length direction is defined as a direction extending from the proximal end to the distal end, wherein the front outrigger including a distal front outrigger and a proximal front outrigger, wherein the rear outrigger including a distal rear outrigger and a proximal rear outrigger;
a middle strut extending in a width direction orthogonal to the length direction and towards a slider tongue, wherein the middle strut includes a first end that adjoins to both an end of the proximal front outrigger and to an end of the rear outrigger and a second end adjoining the middle strut to an inner strut; and
the inner strut extending toward the proximal end from the middle strut to the slider tongue such that the second end of the middle strut connects to the inner strut, the inner strut and the middle strut adjoin the outer struts to the slider tongue.
10. The suspension of claim 9 , comprising at least one microactuator mounted on the slider tongue, wherein the inner strut supports the slider tongue.
11. The suspension of claim 9 , wherein the proximal front outrigger includes a first cross-section and the distal front outrigger includes a second cross-section, wherein a width of the second cross-section width is a same dimension as the first cross-section of the proximal front outrigger.
12. The suspension of claim 11 , wherein a cross-section of the middle strut is about equal to the first and second cross-sections of the front outrigger.
13. The suspension of claim 9 , wherein the distal rear outrigger includes a first cross-section and the proximal rear outrigger includes a second cross-section larger than the first cross-section.
14. The suspension of claim 9 , wherein the front outrigger and the middle strut form a C-shape or U-shape.