There is provided a secondary coil module receiving supply of electric power via a primary coil by contactless power transfer technique. The secondary coil module includes a core formed of magnetic material, the core having a tubular portion in the form of a tube and a bottom portion formed integral with the tubular portion in such a manner as to close an opening of the tubular portion formed at one axial end portion thereof, a storage battery accommodated within an accommodation space provided inside the tubular portion and configured to be charged by the power via the primary coil and a coil winding disposed outside the core and on the side of the bottom portion of the core.

Power reception device (1) includes a plurality of secondary coils (22) which interlinks with magnetic flux output by primary coil (15) and at least one power reception side capacitor (23, 24) electrically connected to the plurality of secondary coils (22), and receives power without contact from power transmission device (10) including primary coil (15). The plurality of secondary coils (22) are connected in series to each other. Central axes of the plurality of secondary coils (22) are oriented in mutually different directions. The plurality of secondary coils (22) and power reception side capacitors (23, 24) configure one power reception side resonance circuit (21). According to the present aspect, power reception side resonance circuit can be easily designed, and a decrease of power transmission efficiency can be suppressed.

In an antenna coil which includes a core member having an X-axis leg section protruding in the X-axis direction from an intersection of the core member and having a Y-axis leg section protruding in the Y-axis direction from the intersection, X-axis winding wires wound around the outer periphery of the X-axis leg section, and Y-axis winding wires wound around the outer periphery of the Y-axis leg section, at least one of an X-axis winding frame section for the X-axis winding wire, the X-axis winding frame section being provided at the X-axis leg section, and a Y-axis winding frame section for the Y-axis winding wire, the Y-axis winding frame section being provided at the Y-axis leg section, has one of intermediate flange sections for respectively separating the X-axis winding frame section and the Y-axis winding frame section into a pair of winding frame sections and a pair of winding frame sections, the winding frame sections of each of the pairs corresponding to different winding shapes.

According to the present invention, there is provided a three-axis antenna with a cross-shaped core (2) having a pair of X-axis arms projecting in the X-axis direction and a pair of Y-axis arms projecting in the Y-axis direction orthogonal to aforementioned X-axis direction in an orthogonal coordinate system, X-axis winding wire (24) wound about aforementioned X-axis arms, Y-axis winding wire (25) wound about aforementioned Y-axis arms, Z-axis winding wire (26) provided in a condition enclosing aforementioned cross-shaped core outside the head sections of aforementioned X-axis arms and the head sections of aforementioned Y-axis arms, wherein aforementioned Z-axis winding wire is housed in a condition so as to cover the entire head surfaces of the X-axis arms and head surfaces of the Y-axis arms in aforementioned cross-shaped core (2).