Coil unit and electronic instrument
AssigneeSeiko Epson Corporation
InventorsMinoru Hasegawa, Hirofumi Okada, Yoichiro Kondo
Life of this patent
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Abstract
A coil unit includes a planar coil that has a transmission side and a non-transmission side, a magnetic sheet provided over the non-transmission side of the planar coil, and a heat sink/magnetic shield plate stacked on a side of the magnetic sheet opposite to a side that faces the planar coil, the heat sink/magnetic shield plate dissipating heat generated by the planar coil and shielding magnetism by absorbing a magnetic flux that has not been absorbed by the magnetic sheet. The heat sink/magnetic shield plate has a thickness larger than that of the magnetic sheet.
Claims14
A coil unit comprising:
- a planar coil that has a transmission side and a non-transmission side;
- a magnetic sheet provided over the non-transmission side of the planar coil;
- and
- a heat sink/magnetic shield plate stacked on a side of the magnetic sheet opposite to a side that faces the planar coil, thus forming a stack direction, the heat sink/magnetic shield plate dissipating heat generated by the planar coil and shielding magnetism by absorbing a magnetic flux that has not been absorbed by the magnetic sheet,
- the heat sink/magnetic shield plate being formed of a non-magnetic material, and
- the heat sink/magnetic shield plate having a thickness larger than that of the magnetic sheet in the stack direction.
A coil unit comprising:
- a planar coil;
- a magnetic sheet;
- and
- a heat sink/magnetic shield plate that has a thickness larger than that of the magnetic sheet in a stack direction,
- the magnetic sheet being provided between the planar coil and the heat sink/magnetic shield plate in the stack direction, and
- the heat sink/magnetic shield plate dissipating heat generated by the planar coil and shielding magnetism by absorbing a magnetic flux that has not been absorbed by the magnetic sheet.
Dependencies are inferred from the claim text.