JP2009004511A - Contactless power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact type power feeding device that prevents a malfunction of a charged device due to heat generated in a power receiving coil.
SOLUTION: A charger 2 in which a feeding coil 4 is housed in a charger case 7 and a device to be charged 3 in which a power receiving coil 5 is housed in a device case 8 to be charged. This is a non-contact type power feeding device 1 in which power can be conveyed between the five by electromagnetic induction. At least a portion of the charger case 7 on the side facing the power receiving coil with which the device case 8 to be charged is brought into contact is made of a heat dissipating material that has higher heat dissipation than the device case 8 to be charged.
[Selection] Figure 1

Description

  The present invention relates to a non-contact power supply apparatus.

  Conventionally, a portable device such as a mobile phone or a digital camera has an electrical contact exposed to the outside and is charged by contacting the electrical contact with an electrical contact of a charger. In recent years, there is a risk that charging may become impossible if the electrical contacts become soiled or get wet with water and rust, so in recent years, the charger is equipped with a power supply coil and the device to be charged is equipped with a power reception coil. Attention has been focused on a non-contact type power supply device that is charged by performing power transfer using electromagnetic induction (see, for example, Patent Document 1).

However, in this non-contact type power supply device, heat is generated in the power receiving coil incorporated in the device to be charged at the time of charging. There was a fear.
JP-A-9-190938

  The present invention has been made in view of the above points, and an object of the present invention is to provide a non-contact type power supply device that prevents the occurrence of malfunctions of a device to be charged due to heat generated in a power receiving coil. To do.

  In order to solve the above-mentioned problem, in the non-contact type power feeding device according to claim 1, the power receiving coil 4 is housed in the charger case 7 and the power receiving coil 5 is housed in the device case 8 to be charged. In the non-contact type power supply apparatus 1 that is configured by the charged device 3 and is configured such that power can be transferred by electromagnetic induction between the opposing coils 4 and 5, at least the charged device case of the charger case 7. The part on the power receiving coil facing surface side with which 8 is contacted is made of a heat dissipating material having a heat dissipating property higher than that of the case 8 to be charged.

  According to this, since at least the portion of the charger case 7 on the side facing the power receiving coil with which the device case 8 to be charged is in contact is made of a heat radiating material having higher heat dissipation than the device case 8 to be charged, Even if heat is generated in the power receiving coil 5, this heat can be quickly transferred from the charged device case 8 to the charger case 7, and the charged device case 8 is heated by the heat generated in the power receiving coil 5. This can prevent the occurrence of problems in the device to be charged 3 due to the heat generated in the power receiving coil 5.

  Moreover, in the non-contact power supply device according to claim 2, in claim 1, the flat area of the portion of the charger case 7 on the power receiving coil facing surface side is compared with the contact area of the device case 8 to be charged. It is characterized by being formed large.

  According to this, a portion of the charger case 7 that is made of a heat dissipation material that has a higher heat dissipation property than the charged device case 8 is a portion facing the outside air without being contacted with the charged device case 8. Since the heat generated in the power receiving coil 5 during charging can be transmitted to the charger case 7 and reliably radiated to the outside air, the heat generated in the power receiving coil 5 causes a problem in the device 3 to be charged. It can be effectively prevented from occurring.

  Further, in the non-contact power supply device according to claim 3, in claim 1 or 2, the charger case 7 is integrally formed of a heat dissipating material having a heat dissipating property higher than that of the device case 8 to be charged. And

  According to this, it is possible to increase a heat dissipating area from the charger case 7 to the outside air, and it is possible to effectively prevent a problem in the charged device 3 due to heat generated in the power receiving coil 5.

  According to a fourth aspect of the present invention, there is provided the non-contact type power feeding device according to any one of the first to third aspects, wherein the power receiving coil is provided on the inner surface of the device case 8 via the non-metallic heat transfer sheet 6. 5 is attached.

  According to this, the heat generated in the power receiving coil 5 is smoothly moved to the charged device case 8 via the heat transfer sheet 6, and is quickly moved to the portion of the charger case 7 facing the power receiving coil. That is, it is possible to prevent the heat generated in the power receiving coil 5 from being heated in the case 8 to be charged and to effectively cause a problem in the device 3 to be charged due to the heat generated in the power receiving coil 5. Can be prevented. In addition, according to the non-metallic heat transfer sheet 6, electromagnetic induction between the power receiving coil 5 and the power feeding coil 4 can be prevented from being disturbed, and charging of the charged device 3 can be performed without any trouble.

  Further, in the non-contact power feeding device according to claim 5, in claim 4, the to-be-charged device case 8 is divided into a heat transfer sheet contact side portion 17 and a heat transfer sheet non-contact side portion 18. The heat transfer sheet contact side part 17 is provided with a contact part to the charger case 7 and the heat transfer sheet contact side part 17 has a higher heat dissipation than the heat transfer sheet non-contact side part 18. It is composed of materials.

  According to this, the heat generated in the power receiving coil 5 is quickly moved to the heat transfer sheet 6, the heat transfer sheet contact side portion 17 of the device case 8 to be charged, and the power receiving coil facing surface side portion of the charger case 7 in order. Can be dissipated. In other words, the heat transferred from the heat transfer sheet contact side portion 17 to the heat transfer sheet non-contact side portion 18 in the charged device case 8 can be suppressed due to the difference in heat dissipation, and the heat generation in the power receiving coil 5 is suppressed. Is quickly moved from the charged device case 8 to the charged device case 8, and it is possible to effectively prevent a problem in the charged device 3 due to heat generated in the power receiving coil 5.

  Moreover, in the non-contact-type electric power feeder which concerns on Claim 6, while one end contact | abuts to the heat-transfer sheet | seat 6 in the site | part which does not overlap with the receiving coil 5 in planar view in the to-be-charged device case 8 in Claim 4. It is characterized in that a to-be-charged-device-side metal heat transfer section 19 whose other end can be brought into contact with the charger case 7 is provided.

  According to this, the heat generated in the power receiving coil 5 can be quickly moved from the heat transfer sheet 6 to the charger case 7 through the metal heat transfer section 19 on the device to be charged, and charged by the heat generated in the power receiving coil 5. It is possible to effectively prevent the device 3 from being defective. In addition, since the to-be-charged device side metal heat transfer part 19 is provided in the site | part which does not overlap with the receiving coil 5 by planar view in the to-be-charged device case 8, it does not inhibit the electromagnetic induction between the receiving coil 5 and the feed coil 4. Thus, the charged device 3 can be charged without any trouble.

  Moreover, in the non-contact-type electric power feeder which concerns on Claim 7, the charger side metal heat-transfer part made to contact | abut the charger case 7 in Claim 6 to the to-be-charged apparatus side metal heat-transfer part 19 in Claim 6 20 is provided.

  According to this, the heat generated in the power receiving coil 5 that has moved to the charged-device-side metal heat transfer portion 19 through the heat-transfer sheet 6 is made of the charger-side metal made in contact with the charged-device-side metal heat transfer portion 19. It can be received by the heat transfer unit 20 without leakage and moved to the charger case 7, and it is possible to effectively prevent a problem in the charged device 3 due to heat generated in the power receiving coil 5.

  In this invention, it has the advantage that the heat | fever which generate | occur | produces with a receiving coil can be escaped outside a to-be-charged apparatus, and the malfunction generation | occurrence | production by the heat | fever of a to-be-charged apparatus can be prevented.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 1 shows a contactless power supply device 1 according to an embodiment of the present invention.

  This non-contact type power feeding device 1 is composed of a charger 2 with a built-in power feeding coil 4 and a to-be-charged device 3 with a built-in power receiving coil 5, and power can be conveyed between the opposing coils 4 and 5 by electromagnetic induction. Therefore, the device to be charged 3 can be charged. That is, when the device to be charged 3 is placed on the charging placement portion 12 on the upper surface of the charger 2, the power feeding coil 4 and the power receiving coil 5 are opposed to each other and the device to be charged 3 is charged. .

  In the charger 2, a charger case 7 in which the feeding coil 4 is housed constitutes an outer shell thereof. The charger case 7 is a box-like case in which the outer edges of the upper wall portion 9 and the bottom wall portion 11 facing each other are connected by the side wall portion 10, and in this example, the upper case 7a and the lower case 7b are divided into two. And is formed. The upper case 7 a is formed in a container shape in which the upper side wall portion 10 a constituting the upper portion of the side wall portion 10 is suspended from the periphery of the upper wall portion 9 and opened downward, and the lower case 7 b constitutes the lower portion of the side wall portion 10. A lower wall portion 10b is formed in a container shape standing from the periphery of the bottom wall portion 11 and opening upward. By combining the upper case 7a and the lower case 7b so that the upper wall portion 10a and the lower wall portion 10b are continuous, a sealed storage portion 13 is formed inside, and the feeding coil 4 is arranged in the storage portion 13. It is installed. On the other hand, the charged device 3 includes a receiving coil 5 and a rechargeable battery (not shown) in a charged device case 8 constituting the outer shell. In addition, although the mobile device in general, such as a mobile phone, a digital camera, and a physical container, is mentioned as the to-be-charged device 3, In this example, it demonstrates taking the mobile phone as an example.

  Here, the power feeding coil 4 of the charger 2 and the power receiving coil 5 of the device to be charged 3 are positioned as close as possible, so that the magnetic flux A generated by the power feeding coil 4 of the charger 2 is efficiently chained to the power receiving coil 5. The power feeding efficiency can be improved. Therefore, in this example, the feeding coil 4 is disposed in the storage portion 13 so that the upper surface is as close as possible to the inner surface portion of the upper wall portion 9 of the charger case 7 that becomes the charging placement portion 12 of the device to be charged 3. Has been. The charged device case 8 includes a charging ground unit 16 that is placed on the charging platform 12 while being grounded. The power receiving coil 5 is a back side of the charging ground unit 16. It arrange | positions so that it may approach to the inner surface site | part of the charging device case 8 as much as possible. Here, the lower part of the case 8 to be charged has a bottom wall part 14 and a side wall part 15 standing at the periphery thereof, and the outer surface (lower surface) of the bottom wall part 14 is charged. The power receiving coil 5 is disposed on the inner surface (upper surface) of the bottom wall portion 14 as well as the grounding portion 16 for use. In the figure, reference numerals 4a and 5a denote magnetic bodies (yokes) around which the coils 4b and 5b are wound. The wound coils 4b and 5b are appropriately subjected to a shape-retaining treatment with a resin or the like. And the receiving coil 5 is formed. Moreover, since the upper wall part 9 of the charger case 7 and the bottom wall part 14 of the to-be-charged device case 8 are places through which the magnetic flux A passes, they are made of a nonmagnetic material or a nonmetallic material that does not affect the magnetic flux A. I am letting. Further, in this example, the upper surface of the upper wall portion 9 that becomes the charging placement portion 12 of the charger case 7 and the lower surface of the bottom wall portion 14 that becomes the charging ground portion 16 of the device case 8 to be charged have a planar shape. While being formed, the bottom wall part 14 of the to-be-charged device case 8 is constituted by a flat lid 14a that can be attached to and detached from the side wall part 15 to be the to-be-charged device body 3a.

  By the way, in the charger 2 of this example, at least a portion of the charger case 7 on the side facing the power receiving coil where the device case 8 to be charged is grounded is a heat dissipation material having higher heat dissipation than the device case 8 to be charged. It is set as the heat radiation part 21 comprised by these. In this example, the heat radiating portion 21 is constituted by the upper case 7 a of the charger case 7. Here, as the material of the upper case 7a, it is preferable to select a material having a thermal conductivity λ (W / mK) larger than that of the case 8 to be charged. For example, a ceramic material is preferably used. it can. When the upper case 7a of the charger case 7 is made of a ceramic material, the thermal conductivity λ1 is about 200 (W / mK), and when the device case 8 to be charged is made of plastic, the device to be charged Since the thermal conductivity λ2 of the case 8 is about 0.1 to 0.3 (W / mK), the upper case 7a of the charger case 7 has a thermal conductivity λ that is sufficiently larger than the case 8 to be charged. (Λ1> λ2). The upper case 7a of the charger case 7 is preferably molded by mixing a plastic material with a high thermal conductive material such as carbon (thermal conductivity λ = 80 to 230).

  In this way, at least the portion of the charger case 7 on the side facing the power receiving coil where the device case 8 to be charged is grounded is the heat radiating portion 21 made of a heat radiating material having higher heat dissipation than the device case 8 to be charged. Even when heat is generated in the power receiving coil 5 during charging, this heat is quickly transferred from the device case 8 to be radiated to the heat radiating portion 21 of the charger case 7. It is possible to prevent the charging device case 8 from becoming hot, and thus to prevent a problem in the charged device 3 due to heat generated by the power receiving coil 5.

  Hereinafter, other examples of the embodiment of the present invention will be listed. Here, the same parts as those in the previous example are denoted by the same reference numerals, description thereof is omitted, and different parts will be described.

  The example of FIG. 2 is an example in which the upper surface area of the upper wall portion 9 of the charger case 7 is formed larger than the area of the charging ground portion 16 (bottom wall portion 14) of the device case 8 to be charged. In addition, the to-be-charged apparatus case 8 of this example is a box-shaped case which connected each outer edge of the upper wall part 22 and the bottom wall part 14 which oppose with the side wall part 15, Comprising: The lower case 8b is formed. The upper case 8 a is formed in a container shape in which the upper side wall portion 15 a constituting the upper portion of the side wall portion 15 is suspended from the periphery of the upper wall portion 22 and opened downward, and the lower case 8 b constitutes the lower portion of the side wall portion 15. The lower wall portion 15b is formed in a container shape standing from the periphery of the bottom wall portion 14 and opening upward. By combining the upper case 8a and the lower case 8b so that the upper wall portion 15a and the lower wall portion 15b are continuous, a sealed storage portion 23 is formed inside, and the power receiving coil 5 is arranged in the storage portion 23. It is installed.

  Here, FIG. 2B shows a top view of the non-contact power feeding apparatus 1 during charging. As is clear from this figure, the peripheral portion of the upper wall portion 9 of the upper case 7a of the charger case 7 protrudes to the side of the device case 8 to be charged. In other words, a portion facing the outside is secured in the heat radiating portion 21 of the charger case 7 without being contacted, and the heat transmitted to the heat radiating portion 21 of the charger case 7 is transmitted from the heat radiating portion 21. The heat could be reliably radiated to the outside air, the movement of the heat generated in the power receiving coil 5 to the charger 2 side can be promoted, and it is effective that the charged device 3 is defective due to the heat generated in the power receiving coil 5. It was possible to prevent.

  The example of FIG. 3 is an example in which the charger case 7 is integrally formed of a heat dissipating material having a higher heat dissipating property than the charged device case 8. That is, the entire outer surface of the charger case 7 constitutes the heat radiating portion 21. Therefore, compared with the previous example, the contact area to the outside air in the heat radiating portion 21 is increased and the heat radiating performance can be improved. As a result, the heat transfer from the charged device case 8 to the charger case 7 is promoted. Thus, it is possible to effectively prevent the charged device 3 from being defective due to the heat generated in the power receiving coil 5. For example, if the bottom wall portion 11 of the charger case 7 is brought into contact with an object made of a material having a higher thermal conductivity, the heat transfer can be further promoted, and the charged device 3 of the charged device 3 due to the heat generated in the power receiving coil 5 can be promoted. It is also preferable because the occurrence of defects can be prevented more effectively.

  In the example of FIG. 4, in the charged device 3, the receiving coil 5 is attached to the inner surface of the charged device case 8 via the non-metallic heat transfer sheet 6, and the charged device case 8 is brought into contact with the heat transfer sheet. The heat transfer sheet contact side portion 17 is provided with a contact portion to the charger case 7 and is divided into a heat transfer sheet contact side portion 17 and a heat transfer sheet contact side portion 17. This is an example in which the heat transfer sheet is made of a heat dissipating material having a heat dissipating property higher than that of the heat transfer sheet non-contact side portion 18.

  Specifically, the heat transfer sheet 6 of this example is laminated along the inner surface of the bottom wall portion 14 of the lower case 8 b of the charged device case 8, and the bottom of the charged device case 8 is interposed via the heat transfer sheet 6. The power receiving coil 5 is attached to the wall portion 14. The heat transfer sheet 6 is preferably made of a non-metallic material having a large thermal conductivity λ, such as ceramic, thermoplastic, or elastomer material containing a heat conductive filler. Can do. Here, the heat transfer sheet 6 is in contact with only the lower case 8b of the device case 8 to be charged including the upper case 8a and the lower case 8b. Further, the lower case 8b of the device case 8 to be charged is formed of a heat radiating material having a higher heat radiating property than the upper case 8a. That is, the heat transfer sheet contact side portion 17 is constituted by the lower case 8b, and the heat transfer sheet non-contact side portion 18 is constituted by the upper case 8a. For example, when the lower case 8b of the charged device case 8 is formed of a ceramic material, the thermal conductivity λ3 is about 200 (W / mK), and the upper case 8a of the charged device case 8 is formed of plastic. In this case, since the thermal conductivity λ4 is about 0.1 to 0.3 (W / mK), the lower case 8b can have a thermal conductivity λ sufficiently larger than that of the upper case 8a (λ3> λ4). ). The lower case 8b of the to-be-charged device case 8 is preferably molded by blending, for example, a plastic material with a high thermal conductive material such as carbon (thermal conductivity λ = 80 to 230). In this example, as in the previous example, the upper case 7a that is the heat radiating portion 21 of the charger case 7 is one that has better heat dissipation than the case 8 to be charged (lower case 8b) ( λ1> λ3).

  Therefore, in the non-contact power supply device 1 of the present example, the heat generated in the power receiving coil 5 is smoothly transferred to the lower case 8b of the device case 8 to be charged via the heat transfer sheet 6, and this The battery case 8 is immediately moved from the lower case 8b to the heat radiating portion 21 of the charger case 7 to dissipate heat. That is, the heat generated in the power receiving coil 5 is generated in the case 8 to be charged. Therefore, it is effectively prevented that the device to be charged 3 is heated, and a problem occurs in the device to be charged 3 due to heat generated by the power receiving coil 5. In particular, the lower case 8b of the to-be-charged device case 8 with which the heat transfer sheet 6 is brought into contact is made of a heat dissipating material having higher heat dissipation than the upper case 8a. Heat transfer to the upper case 8a is less likely to occur, and there is an advantage that heat transfer from the power receiving coil 5 to the heat radiating portion of the charger 2 can be smoothly performed without delay. In addition, according to the non-metallic heat transfer sheet 6, the electromagnetic induction between the power receiving coil 5 and the power feeding coil 4 can be prevented from being obstructed, and the charged device 3 can be charged without any trouble. .

  The example of FIG. 5 is an example in which the lower case 8b of the charged device 3 of the example of FIG. 4 is modified. That is, the lower case 8b of FIG. 4 is formed such that the height dimension of the lower side wall part 15b erected from the peripheral edge of the bottom wall part 14 is sufficiently larger than the thickness dimension of the heat transfer sheet 6. 5 has a flat lid shape in which the height of the lower side wall 15b is formed to be approximately the same as the thickness of the heat transfer sheet 6. In this example, the thickness of the lower case 8b is reduced as described above, thereby reducing the thickness of the device 3 to be charged. In the example of FIG. 4, since the contact area of the lower case 8 b to the outside air (the outer surface area of the side wall portion 15) can be increased, the heat generated in the power receiving coil 5 is transferred to the lower case 8 b via the heat transfer sheet 6. Therefore, heat can be radiated from the lower case 8b to the outside air after the movement to the outside, and as a result, the device to be charged 3 can be prevented from malfunctioning due to the heat generated in the power receiving coil 5.

  4 and 5, all the surfaces of the heat transfer sheet 6 other than the contact surface of the power receiving coil 5 are in contact with the lower case 8b. Since it only needs to function as a thermal bridge with the case 8b, there is no restriction that the entire surface other than the contact surface of the power receiving coil 5 of the heat transfer sheet 6 is in contact with the lower case 8b, and it can be applied in any shape. Needless to say.

  In the example of FIG. 6, the charged object case 8 is configured such that one end abuts on the heat transfer sheet 6 and the other end abuts on the charger case 7 at a portion that does not overlap the power receiving coil 5 in a plan view of the device case 8 to be charged. This is an example in which a device-side metal heat transfer section 19 is provided. According to this, the heat generated in the power receiving coil 5 can be quickly moved from the heat transfer sheet 6 to the charger case 7 through the metal heat transfer section 19 on the device to be charged, and charged by the heat generated in the power receiving coil 5. It is possible to effectively prevent the device 3 from being defective. In this example, the power receiving coil 5 is laminated on the bottom wall portion 14 of the lower case 8b of the device case 8 to be charged, and the device-side metal heat transfer portion 19 is connected to the bottom wall portion 14 of the lower case 8b. It is embedded in the corner portion with the side wall portion 15, and is provided so that only the lower surface which is a contact surface to the charger 2 side is exposed on the lower surface of the bottom wall portion 14. That is, the part to be charged-side metal heat transfer section 19 is a part where the magnetic flux A between the power feeding coil 4 and the power receiving coil 5 does not pass through, and a part that does not overlap with the power receiving coil 5 in a plan view of the case to be charged 8. Therefore, it is possible to prevent the electromagnetic induction between the power receiving coil 5 and the power feeding coil 4 from being hindered, and to charge the charged device 3 without any trouble.

  The example of FIG. 7 is an example in which the charger case 7 is provided with a charger-side metal heat transfer portion 20 that is brought into contact with the device to be charged-side metal heat transfer portion 19. According to this, the heat generated in the power receiving coil 5 that has moved to the charged-device-side metal heat transfer portion 19 through the heat-transfer sheet 6 is made of the charger-side metal made in contact with the charged-device-side metal heat transfer portion 19. Since it can be received by the heat transfer unit 20 without leakage and moved to the charger case 7, it is effectively prevented that a problem occurs in the device to be charged 3 due to heat generated in the power receiving coil 5. In this example, the feeding coil 4 is laminated on the upper wall portion 9 of the upper case 7a of the charger case 7, and the charger-side metal heat transfer portion 20 includes the upper wall portion 9 and the side wall portion of the upper case 7a. 10 is embedded so that only the upper surface which is a contact surface to the to-be-charged device side metal heat transfer portion 19 is exposed on the upper surface of the upper wall portion 9. In other words, the charger-side metal heat transfer section 20 is provided in a portion where the magnetic flux A between the power feeding coil 4 and the power receiving coil 5 does not pass, which is not overlapped with the power feeding coil 4 in plan view in the charger case 7. Therefore, the electromagnetic induction between the power receiving coil 5 and the power feeding coil 4 can be prevented from being hindered, and the charged device 3 can be charged without any trouble. Moreover, since the heat of the to-be-charged device 3 received by the charger-side metal heat transfer unit 20 can be radiated to the outside air by the heat radiating unit 21 of the upper case 7a in which it is embedded, charging is performed from the to-be-charged device 3 side. The movement of heat to the battery 2 is promoted, and it is effectively prevented that a malfunction occurs in the charged device 3 due to the heat generated in the power receiving coil 5.

It is a partially cutaway side view of the non-contact type electric power feeder of the example of embodiment of this invention. It is another example same as the above, (a) is a sectional side view, (b) is a top view. It is a sectional side view of the other example same as the above. It is a sectional side view of the other example same as the above. It is a sectional side view of the other example same as the above. It is a sectional side view of the other example same as the above. It is a sectional side view of the other example same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Non-contact-type electric power feeder 2 Charger 3 Charged device 4 Feeding coil 5 Power receiving coil 6 Heat transfer sheet 7 Charger case 8 Charged device case 17 Heat transfer sheet contact side part 18 Heat transfer sheet non-contact side part 19 Charger side metal heat transfer part 20 Charger side metal heat transfer part

Claims (7)

  It consists of a charger with a power supply coil housed in a charger case and a device to be charged with a power receiving coil housed in a device case to be charged. Power transfer by electromagnetic induction is enabled between the opposing coils. In the non-contact type power supply apparatus, at least a portion of the charger case on the side facing the power receiving coil that is in contact with the case to be charged is made of a heat radiating material having higher heat dissipation than the case to be charged. Non-contact power supply device.   The non-contact type power feeding device according to claim 1, wherein a flat area of a portion of the charger case facing the power receiving coil is formed larger than a contact area of the device case to be charged.   The non-contact type power feeding device according to claim 1 or 2, wherein the charger case is integrally formed of a heat dissipating material having a higher heat dissipating property than the case to be charged.   The non-contact type power feeding device according to any one of claims 1 to 3, wherein a power receiving coil is attached to an inner surface of a case to be charged via a non-metallic heat transfer sheet.   The to-be-charged device case is divided into a heat transfer sheet contact side part and a heat transfer sheet non-contact side part, and the heat transfer sheet contact side part is provided with a contact part to the charger case, and the heat transfer The non-contact type power feeding device according to claim 4, wherein the sheet contact side portion is made of a heat radiation material having higher heat dissipation than the heat transfer sheet non-contact side portion.   In a portion of the device to be charged that is not overlapped with the power receiving coil in a plan view, a device to be charged-side metal heat transfer portion in which one end contacts the heat transfer sheet and the other end can contact the charger case is provided. The non-contact type electric power feeder according to claim 4 characterized by things.   The non-contact type power feeding device according to claim 6, wherein the charger case is provided with a charger-side metal heat transfer portion that is brought into contact with the charged-device-side metal heat transfer portion.

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