A device for a microactuator comprising - a body , - two terminal members articulated (136, 138; 236, 238) on the body , located on one side of the latter, - two deformable bowl-shaped walls which face one another, arranged to house an actuator , two respective first edges of said walls located on one side being fastened on the body , whereas two respective second edges of said walls located on another side move consecutively to a deformation of the walls under the effect of the actuator , - said movement being transmitted by two arms which terminate at the two respective terminal members , wherein the bowl-shaped walls each have a respective bottom against which the actuator bears, and wherein the two terminal members are articulated on the body by respective rods (1360, 1362, 1380, 1382; 2360, 2380), and wherein the two terminal members are articulated on the body by two respective pairs of rods (1360, 1362; 1380, 1382) substantially parallel and of the same length, and wherein the ends of the rods on the terminal member side are substantially aligned, and wherein the deformation of the actuator is a longitudinal expansion or a longitudinal contraction against the two bottoms of the walls , wherein an expansion of the actuator against the two bottoms drives a coming closer together of the first edges and of the second edges , by which the second edges symmetrically drive a relative coming closer together of the terminal members via arms , and wherein a contraction of the actuator against the two bottoms drives a moving apart of the first edges and of the second edges , by which the second edges symmetrically drive a relative moving apart of the terminal members via arms . - a body , - two terminal members articulated (136, 138; 236, 238) on the body , located on one side of the latter, - two deformable bowl-shaped walls which face one another, arranged to house an actuator , two respective first edges of said walls located on one side being fastened on the body , whereas two respective second edges of said walls located on another side move consecutively to a deformation of the walls under the effect of the actuator , - said movement being transmitted by two arms which terminate at the two respective terminal members , wherein the bowl-shaped walls each have a respective bottom against which the actuator bears, and wherein the two terminal members are articulated on the body by respective rods (1360, 1362, 1380, 1382; 2360, 2380), and wherein the two terminal members are articulated on the body by two respective pairs of rods (1360, 1362; 1380, 1382) substantially parallel and of the same length, and wherein the ends of the rods on the terminal member side are substantially aligned, and wherein the deformation of the actuator is a longitudinal expansion or a longitudinal contraction against the two bottoms of the walls , wherein an expansion of the actuator against the two bottoms drives a coming closer together of the first edges and of the second edges , by which the second edges symmetrically drive a relative coming closer together of the terminal members via arms , and wherein a contraction of the actuator against the two bottoms drives a moving apart of the first edges and of the second edges , by which the second edges symmetrically drive a relative moving apart of the terminal members via arms . <EOS>