Noncontact power-transmission coil, portable terminal, and terminal charging device

A portable terminal comprising:

• a rechargeable battery;
• a noncontact power-transmission coil including a planar coil formed by spirally winding a linear conductor made of a single or twisted wire in a substantially same plane and a printed-circuit board having a first external connection terminal portion, a second external connection terminal portion, a first contact portion connected to the inner peripheral end of the spirally-wound linear conductor, a second contact portion connected to the outer peripheral end of the spirally-wound linear conductor, a first conductor pattern connecting the first contact portion to a first external connection terminal portion, and a second conductor pattern connecting the second contact portion to a second external connection terminal portion, one planar portion of the planar coil being attached on the surface of the flexible printed-circuit board;
• and
• a charging control circuit executing control to charge the rechargeable battery with power received through the noncontact power-transmission coil.

A terminal charging device, comprising:

• a terminal-mounting base on which a predetermined portable terminal including a rechargeable battery is mounted;
• a noncontact power-transmission coil that includes a planar coil formed by spirally winding a linear conductor made of a single or twisted wire in a substantially same plane and a printed-circuit board having a first external connection terminal portion, a second external connection terminal portion, a first contact portion connected to the inner peripheral end of the spirally-wound linear conductor, a second contact portion connected to the outer peripheral end of the spirally-wound linear conductor, a first conductor pattern connecting the first contact portion to a first external connection terminal portion, and a second conductor pattern connecting the second contact portion to a second external connection terminal portion, one planar portion of the planar coil being attached on the surface of the flexible printed-circuit board, using electromagnetic induction with a coil installed in the predetermined portable terminal to charge the rechargeable battery of the portable terminal in a noncontact manner;
• and
• a power-supply control unit for controlling power supply to the noncontact power-transmission coil.