Patent ID: 8664827

Claim:
An electric power generation device comprising: a pair of electrodes arranged opposite to each other; and an electret member that is arranged between the pair of electrodes to be spaced apart from the pair of electrodes, and is provided to be movable in a direction of a perpendicular axis passing through the pair of electrodes; a first fixed substrate on which one of the pair of electrodes is provided; a second fixed substrate on which the other of the pair of electrodes is provided; and a movable substrate on which the electret member is provided, wherein: elastic members which elastically support the first and second fixed substrates and the movable substrate are respectively interposed between the first fixed substrate and the movable substrate, and between the second fixed substrate and the movable substrate, and together with the electret member, the movable substrate vibrates in the direction of the perpendicular axis by elastic force of the elastic members.