Power reception device, power transmission device and power transfer system

A power transmission device, comprising:

• a power transmission unit configured to transmit power in a non-contact manner to a power reception unit spaced with a distance therefrom;
• and
• a second holding unit configured to hold said power transmission unit,
• said power transmission unit including a power transmission coil, and
• said power transmission coil being formed by winding a second coil wire which has a width greater than a thickness thereof,
• said second holding unit including a plurality of second coil holding members each formed with a second groove which extends in an extending direction of said power transmission coil and receives said power transmission coil, and
• at least a part of said second groove being formed in such a way that a depth of said second groove extending in a width direction of said second coil wire is greater than a width of said second groove extending in a thickness direction of said second coil wire.

A power transfer system, comprising:

• a power transmission device including a power transmission unit;
• and
• a power reception device configured to receive power in a non-contact manner from said power transmission device,
• said power reception device including:
• a power reception unit configured to receive power in a non-contact manner from said power transmission unit;
• and
• a first holding unit configured to hold said power reception unit,
• said power transmission device including a second holding unit configured to hold said power transmission unit,
• said power reception unit including a power reception coil,
• said power reception coil being formed by winding a first coil wire which has a width greater than a thickness thereof,
• said first holding unit including a plurality of first coil holding members each formed with a first groove which extends in an extending direction of said power reception coil and receives said power reception coil, and
• at least a part of said first groove being formed in such a way that a depth of said first groove extending in a width direction of said first coil wire is greater than a width of said first groove extending in a thickness direction of said first coil wire,
• said power transmission unit including a power transmission coil,
• said power transmission coil being formed by winding a second coil wire which has a width greater than a thickness thereof,
• said second holding unit including a plurality of second coil holding members each formed with a second groove which extends in an extending direction of said power transmission coil and receives said power transmission coil, and
• at least a part of said second groove being formed in such a way that a depth of said second groove extending in a width direction of said second coil wire is greater than a width of said second groove extending in a thickness direction of said second coil wire.