Patent ID: 7304556

Claim:
A buckling actuator comprising: a substrate; a movable member disposed above the substrate and shiftable in a predetermined shifting direction; a stationary member which is disposed on the substrate and supports the movable member; a supporting beam which is connected between the stationary member and the movable member in a buckling manner and supports the movable member at one of two switch positions selectively, the two switch positions being distant from each other in the shifting direction of the movable member; and a switching device arranged to switch the position of the movable member; wherein at least one of a connecting section between the stationary member and the supporting beam, and a connecting section between the movable member and the supporting beam is provided with a rotatable supporter supporting the supporting beam in a rotatable manner about an axis line extending substantially perpendicular to the substrate; and the rotatable supporter includes at least three arm portions extending in directions that are different from one another.