Rotary micromotor

A micro-engine configured to move a micro-structure, the micro-engine comprising a rotation structure, said rotation structure comprising a head portion, a rear portion and a deformable portion connecting the head portion and the rear portion,

• wherein the deformable portion is deformable in elongation or compression along a main axis extending from the head portion to the rear portion,
• wherein the deformable portion comprises at least one spring element, the at least one spring element having a rear end attached to the rear portion, the at least one spring element has a free end,
• wherein the free end of the at least one spring element comprises at least one abutment member,
• wherein the rotation structure further comprises an actuator aligned with the deformable portion along the main axis and configured to actuate sequentially elongation and compression phases of the deformable portion,
• wherein the deformable portion further comprises a wheel-platform which has a first and a second face, the second face being configured to cooperate with the free end of the at least one spring element, in order to transform a back-and-forth movement of the at least one spring element into a rotational movement of the wheel-platform.