Piezoelectric-based toe-heaters for frostbite protection

摘要

A footwear including a body; a base structure; and one or more electrical energy generators disposed in the base structure for generating electrical energy upon application of an impact to the base structure. The footwear is used to produce electrical energy by impacting a base structure of the footwear; and vibrating a mass-spring unit in the base structure to generate an electrical energy.