US Patent 10350461 Device with deformable shell including an internal piezoelectric circuit

A device including a deformable shell delimiting an inner space, and a resilient band suspended in the inner space and including two ends secured to the deformable shell. The band includes a piezoelectric material to generate an electric voltage under the effect of the deformation of the shell and two electrodes for collecting the voltage. An electronic circuit for processing the voltage is arranged on the resilient band and connected to the electrodes of the resilient band.