Patent ID: 8089245

Claim:
A noncontact charging device, comprising: a mounting portion on which a device charged in a noncontact manner is mounted; a magnetic sheet; a flexible printed-circuit board; a primary transmission coil for supplying power to a secondary transmission coil provided to the device by the use of electromagnetic induction, the primary transmission coil disposed between and adhesively connected to the magnetic sheet and the flexible printed-circuit board; a spot-shaped temperature-detecting element formed as a temperature-detecting spot either embedded in the conductor pattern of the flexible printed-circuit board or disposed on and adhesively connected to and between the flexible printed-circuit board and the primary transmission coil; and control means for carrying out control of supplying power to the primary transmission coil and terminating the power supply to the primary transmission coil when a predetermined temperature is detected by the spot-shaped temperature-detecting element, wherein the primary transmission coil has an inner-most coil defining an inner coil diameter and extends radially outwardly therefrom to terminate in an outer-most coil defining an outer coil diameter to form an annular area of a plurality of primary transmission coil segments wrapped around in sequential contact with one another, and the spot-shaped temperature-detecting element extends, as viewed in cross-section, radially and contacts any one of the plurality of primary transmission coil segments in the annular area for detecting a temperature of the primary transmission coil segment at the location of contact.