Non-contact charging module and non-contact charging instrument

Abstract

Provided is a non-contact charging module wherein adverse effects from magnets have been prevented even where magnets are used for positioning, power transmission efficiency has been improved, and the entire module has been made thin due to a state of improved power transmission efficiency. The non-contact charging module comprises a planar coil portion ( 2 ) of spirally wound conductive wiring, and a magnetic sheet ( 3 ) that is provided so as to oppose a surface of a coil ( 21 ) on the planar coil portion ( 2 ), and is characterized in that the magnetic sheet is layered with a first layer, and a second layer that has a lower magnetic permeability and a higher saturation magnetic flux density than the first layer.

1 - 9 . (canceled) 
     
     
         10 . A non-contact charging module comprising:
 a plane coil including a wound conducting wire; and   a magnetic sheet on which a coil surface of the plane coil is placed, and which is provided so as to face the coil surface of the plane coil, wherein p 1  the magnetic sheet includes a first layer and a second layer that has a lower magnetic permeability and a higher saturation magnetic flux density than the first layer, the first layer and the second layer being stacked in the magnetic sheet.   
     
     
         11 . The non-contact charging module according to  claim 10 , wherein, for alignment with a counterpart-side non-contact charging module, there are situations where a magnet provided in the counterpart-side non-contact charging module is utilized and there are situations where a magnet is not utilized. 
     
     
         12 . The non-contact charging module according to  claim 10 , wherein the first layer is formed by a first ferrite sheet, and the second layer is formed by a second ferrite sheet. 
     
     
         13 . The non-contact charging module according to  claim 12 , wherein a thickness of the second ferrite sheet is approximately three times a thickness of the first ferrite sheet in a stacking direction of the magnetic sheet. 
     
     
         14 . The non-contact charging module according to  claim 13 , wherein a thickness of the magnetic sheet is approximately 600 μm. 
     
     
         15 . The non-contact charging module according to  claim 10 , wherein the first layer includes an amorphous material. 
     
     
         16 . The non-contact charging module according to  claim 10 , wherein the second layer is a Mn—Zn ferrite sheet having a magnetic permeability that is equal to or higher than 250 and a saturation magnetic flux density that is equal to or higher than 350 mT. 
     
     
         17 . The non-contact charging module according to  claim 10 , wherein the second layer faces the plane coil. 
     
     
         18 . The non-contact charging module according to  claim 10 , wherein an inner width of the inner coil is larger than 15.5 mm. 
     
     
         19 . The non-contact charging module according to  claim 10 , wherein the magnetic sheet includes a slit which the conducting wire is housed. 
     
     
         20 . The non-contact charging module according to  claim 10 , wherein the plane coil is wound in a rectangular shape. 
     
     
         21 . A non-contact charger comprising a plane coil included in the non-contact charging module according to  claim 10 , wherein the plane coil is used as at least one of a power transmission coil and a power reception coil. 
     
     
         22 . A communication device comprising a plane coil included in the non-contact charging module according to  claim 10 , wherein the plane coil is used as a power reception coil.