Patent ID: 8129943

Claim:
An induction charger for charging an electronic device, the induction charger comprising: a carrying car comprising: a base defining at least four slots scatted therein; at least two rotatable shafts; and at least two pairs of wheels positioned on a corresponding rotatable shaft and received in and passed through one corresponding slot; a permanent magnet; a transmission assembly comprising: a gear case having a first through hole and a second through hole; a first hollow shaft non-rotatably fixed to the permanent magnet; and a second hollow shaft being inserted into a corresponding rotatable shaft; an alternating current power supply; and an induction coil positioned in the base and aligned with and substantially parallel to the permanent magnet and electrically connected to the alternating current power the carrying car further includes a cover; the cover comprises a front sidewall; and a front side wall has a through hole; wherein: the induction charger further comprises a storage battery and a control circuit comprising a DC/AC converter; the storage battery is electrically connected to the DC/AC converter; the DC/AC converter is configured for converting direct current from the storage battery into alternating current to the induction coil to generate an alternating magnetic field to generate a magnetic force; and the magnetic force makes the rotatable shaft rotate and the wheels rotate; charger further comprising an electromagnetic clutch electrically connected to the control circuit; wherein the electromagnetic clutch is positioned between the gear case and the permanent magnet, and is configured for controlling the first hollow shaft and the permanent magnet to engage or disengage with each other to control the wheels to rotate or stop rotating.