Patent ID: 8779651

Claim:
An apparatus for converting vibratory mechanical energy into electrical energy, said apparatus comprising a mobile mass, a support, a first beam, a second beam, and a first junction element, wherein said first beam extends longitudinally between said support and said mobile mass, wherein said first beam has a first end embedded in said support and a second end embedded in said mobile mass, wherein said first beam has a first elongation stiffness along a longitudinal direction thereof, wherein said second beam is made of piezoelectric material, wherein said second beam extends along a longitudinal direction between said support and said mobile mass, wherein said second beam links said support and said mobile mass, wherein said second beam has a second elongation stiffness along said longitudinal direction that is lower than said first elongation stiffness, wherein said first junction element extends between said first and second beams, wherein said first junction element maintains a spacing between said first beam and said second beam, wherein a first assembly comprises said first beam, said second beam, and said first junction element, wherein said first assembly has a first bending stiffness, wherein a second assembly consists of said first assembly with said second beam excluded therefrom, wherein said second assembly has a second bending stiffness, and wherein said first bending stiffness is at least double said second bending stiffness.