Device (34; 100; 120; 130; 150; 170) capable of detecting a bearing force exerted in a direction of indentation, this device comprising: - a support (50; 158) rigid by tension, - at least one plate which extends from a proximal end mounted on the support, to a free distal end (64; 104; 134; 162), this plate being elastically deformable by the bearing force from: • a bent conformation in which the plate exhibits a convex bearing face on which the bearing force to be detected is directly exerted, • to a more flattened conformation in which the convex bearing face is more flattened, - a spring (52; 102; 132; 152, 154; 172) capable of permanently straining the plate to its bent conformation such that, after disappearance of the bearing force, the plate automatically reverts to its bent conformation, - a guiding mechanism also mounted on the support and capable, in response to the deformation of the plate, of guiding the free distal end of the plate in translation along a translation axis at right angles to the direction of indentation, - a sensor (80; 122; 174) capable of detecting a displacement of the free distal end along the translation axis to detect the bearing force, • this sensor being fixed to the proximal end with no degree of freedom in translation along the translation axis, or • this sensor being directly fixed on or under the plate and this sensor being capable of measuring the deformation of this plate. - a support (50; 158) rigid by tension, - at least one plate which extends from a proximal end mounted on the support, to a free distal end (64; 104; 134; 162), this plate being elastically deformable by the bearing force from: • a bent conformation in which the plate exhibits a convex bearing face on which the bearing force to be detected is directly exerted, • to a more flattened conformation in which the convex bearing face is more flattened, • a bent conformation in which the plate exhibits a convex bearing face on which the bearing force to be detected is directly exerted, • to a more flattened conformation in which the convex bearing face is more flattened, - a spring (52; 102; 132; 152, 154; 172) capable of permanently straining the plate to its bent conformation such that, after disappearance of the bearing force, the plate automatically reverts to its bent conformation, - a guiding mechanism also mounted on the support and capable, in response to the deformation of the plate, of guiding the free distal end of the plate in translation along a translation axis at right angles to the direction of indentation, - a sensor (80; 122; 174) capable of detecting a displacement of the free distal end along the translation axis to detect the bearing force, • this sensor being fixed to the proximal end with no degree of freedom in translation along the translation axis, or • this sensor being directly fixed on or under the plate and this sensor being capable of measuring the deformation of this plate. • this sensor being fixed to the proximal end with no degree of freedom in translation along the translation axis, or • this sensor being directly fixed on or under the plate and this sensor being capable of measuring the deformation of this plate.