A device for a microactuator comprising - a body, - two terminal members (20, 22) articulated (136, 138; 236, 238) on the body, located on one side of the latter, - two deformable bowl-shaped walls (120, 122) which face one another, arranged to house an actuator, two respective first edges (1202, 1222) of said walls (120, 122) located on one side being fastened on the body, whereas two respective second edges (1204, 1224) of said walls (120, 122) located on another side move consecutively to a deformation of the walls (120, 122) under the effect of the actuator, - said movement being transmitted by two arms (132, 134) which terminate at the two respective terminal members (20, 22), wherein the bowl-shaped walls (120, 122) each have a respective bottom (1200, 1220) against which the actuator bears, and wherein the two terminal members (20, 22) are articulated on the body by respective rods (1360, 1362, 1380, 1382; 2360, 2380), and wherein the two terminal members (20, 22) 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 (1322, 1342) of the rods (1360, 1362, 1380, 1382) on the terminal member (20, 22) side are substantially aligned, and wherein the deformation of the actuator is a longitudinal expansion or a longitudinal contraction against the two bottoms (1200, 1220) of the walls (120, 122), wherein an expansion of the actuator against the two bottoms (1200, 1220) drives a coming closer together of the first edges (1202, 1222) and of the second edges (1204, 1224), by which the second edges (1204, 1224) symmetrically drive a relative coming closer together of the terminal members (20, 22) via arms (132, 134), and wherein a contraction of the actuator against the two bottoms (1200, 1220) drives a moving apart of the first edges (1202, 1222) and of the second edges (1204, 1224), by which the second edges (1204, 1224) symmetrically drive a relative moving apart of the terminal members (20, 22) via arms (132, 134). - a body, - two terminal members (20, 22) articulated (136, 138; 236, 238) on the body, located on one side of the latter, - two deformable bowl-shaped walls (120, 122) which face one another, arranged to house an actuator, two respective first edges (1202, 1222) of said walls (120, 122) located on one side being fastened on the body, whereas two respective second edges (1204, 1224) of said walls (120, 122) located on another side move consecutively to a deformation of the walls (120, 122) under the effect of the actuator, - said movement being transmitted by two arms (132, 134) which terminate at the two respective terminal members (20, 22), wherein the bowl-shaped walls (120, 122) each have a respective bottom (1200, 1220) against which the actuator bears, and wherein the two terminal members (20, 22) are articulated on the body by respective rods (1360, 1362, 1380, 1382; 2360, 2380), and wherein the two terminal members (20, 22) 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 (1322, 1342) of the rods (1360, 1362, 1380, 1382) on the terminal member (20, 22) side are substantially aligned, and wherein the deformation of the actuator is a longitudinal expansion or a longitudinal contraction against the two bottoms (1200, 1220) of the walls (120, 122), wherein an expansion of the actuator against the two bottoms (1200, 1220) drives a coming closer together of the first edges (1202, 1222) and of the second edges (1204, 1224), by which the second edges (1204, 1224) symmetrically drive a relative coming closer together of the terminal members (20, 22) via arms (132, 134), and wherein a contraction of the actuator against the two bottoms (1200, 1220) drives a moving apart of the first edges (1202, 1222) and of the second edges (1204, 1224), by which the second edges (1204, 1224) symmetrically drive a relative moving apart of the terminal members (20, 22) via arms (132, 134).