Power generation element and smart key

Abstract

A power generation element includes a coil extending in a first direction, a magnetic member inserted inside the coil and in which a large Barkhausen effect occurs, a magnet disposed outside the coil and in a vicinity of the magnetic member, a first elastic member fixed to the magnet, and a casing housing the magnetic member, the coil, the magnet, and the first elastic member. The magnet includes different magnetic poles alternately arranged side by side in a second direction orthogonal to the first direction. The first elastic member connects the magnet and the casing to each other and is stretchable in the second direction. The magnet moves in the second direction relative to the casing in association with expansion and contraction of the first elastic member.

Dependencies are inferred from the claim text.