Shape memory actuator with bistable driven element

A shape memory actuator comprising:

• a supporting body, a driven element pivotably mounted on said supporting body,
• a SMA actuating member having a V-shaped configuration, wherein both ends of the SMA actuating member are secured by locking members to said supporting body, and
• a driving element in permanent contact with said driven element,
• wherein movement of the driven element is determined by said SMA actuating member and by at least one resilient return member acting in opposition to the SMA actuating member, the driven element being able to take two stable positions under action of a bistable moving system connecting said driving element to the driven element such that each toggling between said two stable positions is due to an activation of the SMA actuating member, and
• wherein the SMA actuating member, said bistable moving system, said resilient return member, the driving element and the driven element are enclosed in the supporting body.