Patent ID: 8240208

Claim:
A guiding blade for a mobile proof mass of an electromechanical system micro-machined from a plate of thickness h forming a plane O,x,y, the electromechanical system including a base and at least one measurement cell to measure forces acting on the proof mass in a direction Oy, said proof mass being capable of translation displacement in the direction Oy, and linked to the base by at least one guiding blade, said blade being arranged parallel to an axis Ox orthogonal to an axis Oy and linked to a part fixed to the base, said blade being monolithic and limiting a displacement of said proof mass in a direction Ox by deformation of said blade by traction or by compression in said direction Ox, the guiding blade further comprising, close to each of its ends, a hinge section with a reduced thickness in the direction Oy to limit the stiffness encountered by the proof mass being displaced in the direction Oy by cooperative deformation by double flexing of said hinge sections in the direction Oy of measurement of the inertia force, said sections of reduced thickness L surrounding a central section with a thickness L t that is greater in the direction Oy conferring on the guiding blade a critical buckling load that is increased by at least one order of magnitude in the direction Ox, while retaining for said guiding blade a flexibility of the same order of magnitude in the direction Oy.