Patent ID: 7643253

Claim:
A rotational micro-actuator comprising a metal frame and PZT pieces attached to said metal frame, characterized in that said metal frame is formed with a central coupling portion by which the micro-actuator is coupled to a suspension tongue, and two pieces of said PZT are arranged in central symmetry manner about said central coupling portion such that said micro-actuator can rotate about said central coupling portion in response to the driving signals applied to said PZT pieces, wherein said metal frame is formed with an end coupling portion at the two ends thereof, by which a head element is fixedly mounted to said rotational micro-actuator, wherein said metal frame includes two arms, which are formed to be central symmetric with each other about said central coupling portion, between said end coupling portion and said central coupling , and said PZT pieces being attached to the outside surfaces of said arms, wherein a first notch and a second notch are formed on the respective sides of the arms to which the PZT pieces are not attached in such a manner that the first notch and second notch open in opposite direction such that the whole metal frame takes the share of letter “S”.