Underground generating device that is rolled or run over by cars so as to provide a generating effect

摘要

An underground generating device includes a housing, a coil assembly mounted in the housing, and a core assembly movably mounted in the housing. The coil assembly includes a coil seat, a plurality of mounting tubes mounted in the coil seat and a plurality of induction coil sets mounted on each of the mounting tubes. The core assembly includes a plurality of cores movably mounted in the mounting tubes, a plurality of magnetic disks mounted on each of the cores, and a driven piece located outside of the housing and connected with the cores. Thus, when the driven piece is pressed intermittently, the magnetic disks are moved to pass through the induction coil sets reciprocally to change the magnetic field between the magnetic disks and the induction coil sets so that the induction coil sets produce an induction current to provide a generating effect.