Patent ID: 8653717

Claim:
A vibration power generator comprising: a first substrate; a first electrode disposed on a lower surface of the first substrate, the first electrode including a film retaining electric charges; a second substrate disposed away from the first substrate and opposed to the lower surface of the first substrate; a second electrode disposed on an upper surface of the second substrate so as to be opposed to the first electrode; a third electrode disposed on an upper surface of the first substrate, the third electrode including a film retaining electric charges; a third substrate disposed away from the first substrate and opposed to the upper surface of the first substrate; and a fourth electrode disposed on a lower surface of the third substrate so as to be opposed to the third electrode, wherein the film retaining the electric charges of the first electrode retains electric charges having a polarity different from a polarity of the film retaining the electric charges of the third electrode, wherein the vibration power generator further comprises a restoring force generation member for giving a restoring force, the first substrate being held at a predetermined position when an external force is not exerted to the first substrate, the first substrate being restored to the predetermined position when the external force is exerted to the first substrate and thus the first substrate moves with respect to the second substrate, wherein a plurality of the first electrodes and a plurality of the third electrodes are disposed along a direction of the moving of the first substrate with respect to the second substrate, respectively, and wherein the first electrode and the third electrode comprise, stacked successively from the first substrate, a conductive material, an insulator and the film retaining the electric charges in this order from, respectively.