Abstract: A portable electronic device includes a housing, a secondary battery disposed inside a tip portion of the housing, and a power receiving coil unit disposed around the secondary battery. The power receiving coil unit has a first coil in which a conductive wire is helically wound around a first magnetic body and a second coil in which a conductive wire is wound helically around a second magnetic body. The first magnetic body and the second magnetic body are disposed between an outer side surface of the secondary battery and an inner side surface of the housing. The first coil and the second coil are located at mutually different positions in a direction around an axis of the secondary battery and are interconnected such that opposed magnetic flux is generated in respective winding axes when current flows the first and second coils.

Abstract: A portable electronic device includes a housing, a secondary battery disposed inside a tip portion of the housing, and a power receiving coil unit disposed around the secondary battery. The power receiving coil unit has a first coil in which a conductive wire is helically wound around a first magnetic body and a second coil in which a conductive wire is wound helically around a second magnetic body. The first magnetic body and the second magnetic body are disposed between an outer side surface of the secondary battery and an inner side surface of the housing. The first coil and the second coil are located at mutually different positions in a direction around an axis of the secondary battery and are interconnected such that opposed magnetic flux is generated in respective winding axes when current flows the first and second coils.

Abstract: A non-contact power supply device on which a power-feeding object device can easily and appropriately be placed, and a non-contact power transmission device including the power-feeding object device. The non-contact power transmission device includes a non-contact power supply device having a power feeding coil, a housing that houses the power feeding coil, and a bobbin around which the power feeding coil is wound. The housing has a concave part at least partially accommodating a power-feeding object device. The concave part has a curved surface at least in a portion of an inner surface on which the power-feeding object device is placed. The curved inner surface of the concave part prevents the power-feeding object device from standing upright. A portable electronic device serving as the power-feeding object device is at least partially accommodated in the concave part.

Abstract: A non-contact power supply device on which a power-feeding object device can easily and appropriately be placed, and a non-contact power transmission device including the power-feeding object device. The non-contact power transmission device includes a non-contact power supply device having a power feeding coil, a housing that houses the power feeding coil, and a bobbin around which the power feeding coil is wound. The housing has a concave part at least partially accommodating a power-feeding object device. The concave part has a curved surface at least in a portion of an inner surface on which the power-feeding object device is placed. The curved inner surface of the concave part prevents the power-feeding object device from standing upright. A portable electronic device serving as the power-feeding object device is at least partially accommodated in the concave part.

Abstract: A first flexible board includes first electrodes and first conductors. Each of the first conductors bridges and electrically connects one of the first electrodes on one side of the first board to one of the first electrodes on the other side of the first board. A second flexible board has second electrodes and second conductors. Each of the second conductors bridges and electrically connects one of the second electrodes on one side of the second board and one of the second electrodes on the other side of the second board. The first flexible board and the second flexible board are laminated to each other such that the first electrodes and the second electrodes are in face-to-face contact with each other, and the first conductors and the second conductors form a current path helically encircling an axis in a direction extending through the first electrodes and the second electrodes.