Patent ID: 7821743

Claim:
A micro-actuator, comprising: a substantially U-shaped frame including a cavity capable of receiving a slider, the frame including two side arms and a bottom support arm at least partially defining the cavity; wherein each side arm has a PZT element mounted on an outer surface thereof facing away from the cavity; and, wherein the bottom support arm is substantially rectangle-shaped and has at least one cavity-facing tooth extending from a first side of the bottom support arm facing towards the cavity, the at least one cavity-facing tooth at least partially forming at least one cavity-facing protrusion and at least partially defining at least one cavity-facing recession, wherein the bottom support arm has at least one rear-facing tooth extending from a second side of the bottom support arm facing away from the cavity, the at least one rear-facing tooth at least partially forming at least one rear-facing protrusion and at least partially defining at least one rear recession, and wherein the bottom support arm is capable of providing improved shock performance and capable of conveying a high resonance frequency response at a low gain.