JP6566114B2 - Non-contact power feeding device and non-contact power transmission device - Google Patents

Description

  The present invention relates to a non-contact power supply device that supplies power to a power supply target device such as a portable electronic device in a non-contact manner and a non-contact power transmission device including the same.

  In recent years, in portable electronic devices including wearable devices such as earphones, headsets, and hearing aids, miniaturization has progressed and the use of secondary batteries as power sources has progressed. When the power source is a secondary battery, a method of charging by charging a connector of a charging cable into a portable electronic device can be considered, but the operation of inserting the connector is complicated. In addition, if the connector can be easily inserted, it will be difficult to waterproof. On the other hand, if charging is performed using non-contact power transmission, there is no trouble of inserting the connector into the portable electronic device, and a waterproof structure is easy to take.

  The following Patent Document 1 relates to a wireless charging device, and “a charger has a power supply cut core around which a power supply coil is wound, a transmission circuit unit, and a power supply capable of supplying power, and a first exterior case. The portable device has a power receiving core around which a power receiving coil is wound, a rechargeable secondary battery, a power receiving circuit unit, and a system circuit unit, and is stored in a second exterior case. The power receiving core is surrounded by the power supply cut core, and the power reception core and the power supply cut core are electromagnetically coupled to each other with the second outer case interposed therebetween, and an AC magnetic field induced in the power supply coil is formed from the power supply cut core to the cylindrical cut core. Then, when an alternating current is induced in the power receiving coil, the contents of “the battery of the portable device is charged with the power conveyed from the power source of the charger to the power receiving coil from the power supply coil” are disclosed.

Japanese Patent Laying-Open No. 2015-2580

  In the wireless charging device of Patent Document 1, when the mobile device is attached to the charger, if the rotational deviation in the in-plane direction with respect to the attachment surface occurs, the power receiving core is not surrounded by the power feeding cut core. There was a possibility that the power cut core could not be electromagnetically coupled, resulting in poor charging. Here, if the structure on the charger side is such that the mounting position of the portable device is regulated so that the power receiving core and the power feeding cut core can be electromagnetically coupled, there is a problem that the mounting of the portable device to the charger becomes difficult. That is, in the related art, there is a problem that it is difficult to appropriately arrange the portable device (power-supply target device) in the charger (non-contact power supply device), and the burden on the user is large and convenience is impaired.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a non-contact power supply apparatus that can easily arrange a power supply target device and a non-contact power transmission apparatus including the same. is there.

One embodiment of the present invention is a contactless power supply device. This non-contact power feeding device
A housing having a recess capable of accommodating at least a part of the power supply target device;
A first magnetic body, a second magnetic body, and a feeding coil housed in the housing,
The power supply coil includes a first coil in which a conducting wire is wound around the first magnetic body, and a second coil in which a conducting wire is wound around the second magnetic body,
A pair of magnetic pole portions appearing in the first magnetic body by energizing the first coil are opposed to each other through the recess,
A pair of magnetic pole portions appearing in the second magnetic body by energizing the second coil are opposed to each other through the recess,
A first imaginary line connecting the pair of magnetic pole portions appearing in the first magnetic body and a second imaginary line connecting the pair of magnetic pole portions appearing in the second magnetic body are viewed from the opening direction of the recess. Cross each other.

  The first and second imaginary lines may be substantially orthogonal to each other when viewed from the opening direction of the recess.

  Each of the first and second magnetic bodies may be arranged so as to sandwich the recess.

  The first magnetic body may have first and second convex portions projecting toward the concave portion at both ends.

  The second magnetic body may have third and fourth convex portions protruding toward the concave portion at both ends.

The first coil includes a first winding portion in which a conductive wire is wound around the first convex portion, and a second winding portion in which a conductive wire is wound around the second convex portion,
The second coil includes a third winding portion in which a conductive wire is wound around the third convex portion, and a fourth winding portion in which a conductive wire is wound around the fourth convex portion,
The first and second winding parts are connected to each other so as to generate magnetic fields in the same direction,
The third and fourth winding portions may be connected to each other so as to generate magnetic fields in the same direction.

The first magnetic body has rod-shaped first and second portions whose end faces face each other through the recess,
The second magnetic body has rod-shaped third and fourth portions whose end faces face each other through the recess,
A third magnetic body interconnecting the first to fourth portions;
The first coil includes a first winding portion in which a conducting wire is wound around the first portion, and a second winding portion in which a conducting wire is wound around the second portion,
The second coil includes a third winding portion in which a conducting wire is wound around the third portion, and a fourth winding portion in which a conducting wire is wound around the fourth portion,
The first and second winding parts are connected to each other so as to generate magnetic fields in the same direction,
The third and fourth winding portions may be connected to each other so as to generate magnetic fields in the same direction.

  A power transmission circuit for energizing the first and second coils at different timings may be provided.

  The power transmission circuit may include a power supply device that generates an alternating current, and a positive current among the alternating currents may flow through the first coil, and a negative current among the alternating currents may flow through the second coil. .

  You may provide the auxiliary coil which circulates around the said recessed part helically in the said housing | casing.

  You may provide the additional coil provided in the position facing the bottom part of the said recessed part in the said housing | casing around the plane.

  A sheet-like or plate-like magnetic body may be provided on the side of the additional coil opposite to the bottom of the recess.

  Another aspect of the present invention is a contactless power transmission device. The contactless power transmission device includes the contactless power supply device and a portable electronic device at least partially accommodated in the concave portion of the contactless power supply device. The portable electronic device is a secondary battery. And a non-contact power receiving device including a power receiving coil.

  The opening width of the recess may be shorter than the dimension in the longitudinal direction of the portable electronic device.

  The power receiving coil may have a winding axis that is substantially parallel to a thickness direction of the secondary battery and spirals around the secondary battery.

  In the power receiving coil, the winding axis may be curved along the outer peripheral side surface of the secondary battery.

  It should be noted that any combination of the above-described constituent elements, and those obtained by converting the expression of the present invention between methods and systems are also effective as aspects of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the non-contact electric power feeder which can arrange | position an electric power feeding object apparatus appropriately, and a non-contact electric power transmission apparatus provided with the same can be provided.

The perspective view of the portable electronic device 80 as an electric power feeding object apparatus in Embodiment 1 of this invention. The principal part disassembled perspective view of the portable electronic device 80. FIG. FIG. 3 is a schematic cross-sectional view of a first configuration example of a non-contact power receiving device 90 of a portable electronic device 80. The schematic sectional drawing of the 2nd structural example of the non-contact electric power receiving apparatus 90. FIG. The perspective view which shows the arrangement | positioning method of the non-contact electric power feeder 10 in Embodiment 1 of this invention and the portable electronic device 80 with respect to it. Arrangement example 1 of the non-contact power receiving device 90, the first magnetic body 20, the first coil 25, the second magnetic body 30, and the second coil 35 in the non-contact power transmission apparatus 1 according to the first embodiment of the present invention is shown. Perspective view. FIG. 3 is a plan sectional view of Arrangement Example 1. The front sectional view of Arrangement Example 1. The perspective view which shows the example 2 of arrangement | positioning of the non-contact electric power receiving apparatus 90, the 1st magnetic body 20, the 1st coil 25, the 2nd magnetic body 30, and the 2nd coil 35 in the non-contact electric power transmission apparatus 1. FIG. FIG. 6 is a plan sectional view of Arrangement Example 2. The front sectional view of Arrangement Example 2. FIG. 9 is an assembly explanatory diagram of a third configuration example of the non-contact power receiving apparatus 90. The perspective view of the 3rd structural example of the non-contact power receiving apparatus 90. FIG. FIG. The front view. The perspective view which shows the example 3 of arrangement | positioning of the non-contact electric power receiving apparatus 90, the 1st magnetic body 20, the 1st coil 25, the 2nd magnetic body 30, and the 2nd coil 35 in the non-contact electric power transmission apparatus 1. FIG. FIG. 6 is a plan sectional view of Arrangement Example 3. The front sectional view of Arrangement Example 3. The perspective view which shows the example 4 of arrangement | positioning of the non-contact electric power receiving apparatus 90, the 1st magnetic body 20, the 1st coil 25, the 2nd magnetic body 30, and the 2nd coil 35 in the non-contact electric power transmission apparatus 1. FIG. FIG. 7 is a plan sectional view of Arrangement Example 4. The front sectional view of Arrangement Example 4. FIG. 3 is a diagram illustrating the principle of operation of the non-contact power transmission device 1. The circuit diagram of the non-contact electric power feeder 10 and the portable electronic device 80. FIG. The wave form diagram of the electric current which flows into the 1st coil 25 and the 2nd coil 35 in arbitrary cycles. The front sectional view of the non-contact electric power transmission apparatus 2 concerning Embodiment 2 of this invention. The front sectional view of non-contact electric power transmission apparatus 3 concerning Embodiment 3 of the present invention. The perspective view which shows the non-contact electric power feeder 10 in Embodiment 4 of this invention, and the arrangement | positioning method of the portable electronic device 80 with respect to it. The perspective view which shows the example of arrangement | positioning of each magnetic body and each coil of the non-contact electric power receiving apparatus 90 and the non-contact electric power feeder 10 in the non-contact electric power transmission apparatus 4 of Embodiment 4 of this invention. FIG. 29 is a plan sectional view of the arrangement example shown in FIG. 28. FIG. The perspective view which shows the other example of arrangement | positioning of each magnetic body of each of the non-contact electric power receiving apparatus 90 and the non-contact electric power feeder 10, and each coil. The perspective view which shows the other structural example 1 of the magnetic body group in the non-contact electric power feeder 10 of Embodiment 1. FIG. The perspective view which shows the other structural example 2 of the same magnetic body group. The perspective view which shows the other structural example of the magnetic body group in the non-contact electric power feeder 10 of Embodiment 1, and a coil group. The top view of the magnetic body group and coil group of the structure which made the number of magnetic poles six in the non-contact electric power feeder 10 of Embodiment 4. FIG. The top view of the magnetic body group and coil group of the structure which made the number of magnetic poles eight in the non-contact electric power feeder 10 of Embodiment 4. FIG. The top view of the magnetic body group of the structure which cut off a part of 3rd magnetic body 40 in the non-contact electric power feeder 10 of Embodiment 4, and a coil group.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted suitably. In addition, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

Embodiment 1
A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the portable electronic device 80 is a hearing aid in the present embodiment, and has an insertion portion 83 for an ear at the distal end of a cable 82 drawn from a housing 81. The housing 81 can be fastened to the user's clothes by locking means such as a clip (not shown). Note that the portable electronic device 80 may be of a type that is hooked into the ear or inserted into the ear. The portable electronic device 80 includes functional parts such as a non-contact power receiving device 90 and a microphone (not shown) shown in FIG. 3 or 4 inside the housing 81. Note that the non-contact power receiving device 90 shown in FIG. 2 is a schematic exploded perspective view of the first configuration example shown in FIG.

  As illustrated in FIG. 3, the non-contact power receiving device 90 according to the first configuration example includes a secondary battery 84 such as a lithium ion secondary battery, a power receiving coil 85, a case 86, and a lid 87. The case 86 and the lid 87 are sintered bodies of magnetic powder such as ferrite, for example. The power receiving coil 85 has a winding axis that is substantially parallel to the thickness direction of the secondary battery 84 and spirals around the secondary battery 84. The axial direction of the power receiving coil 85 is parallel to the thickness direction of the housing 81. However, the secondary battery 84 may be disposed obliquely with respect to the thickness direction in the housing 81, and in such a case, the axial direction of the power receiving coil 85 is not parallel to the thickness direction of the housing 81. Sometimes. The case 86 has a box shape having an internal space for accommodating the secondary battery 84, and covers the bottom surface and the outer peripheral surface (side surface) of the secondary battery 84. A side surface of the case 86 is interposed between the power receiving coil 85 and the outer peripheral surface of the secondary battery 84. The lid 87 covers the case 86 and covers the upper opening of the case 86 (covers the upper surface of the secondary battery 84). Case 86 preferably has a flange 86a on the bottom surface that extends outward from the side surface. The lid 87 preferably has a flange 87 a that extends outward from the side surface of the case 86. The flange portions 86a and 87a are respectively located on the outer sides of both ends of the power receiving coil 85 in the axial direction (the lower side and the upper side of the power receiving coil 85 in FIG. 3), and prevent a deviation when the power receiving coil 85 is wound around the side surface of the case 86. To do.

  As shown in FIG. 4, the non-contact power receiving apparatus 90 according to the second configuration example is different in that the case 86 and the lid 87 shown in FIG. 3 are changed to flexible magnetic sheets 88, 89a, 89b. Matches in other respects. The magnetic sheet 88 has a hollow cylindrical shape (for example, a cylindrical shape) that accommodates the secondary battery 84 inside and is open at both ends. The magnetic sheet 88 is provided between the power receiving coil 85 and the outer peripheral surface of the secondary battery 84. The magnetic sheet 89 a covers one opening (here, the upper opening) of the magnetic sheet 88. The magnetic sheet 89b covers the other opening (here, the lower opening) of the magnetic sheet 88.

  As shown in FIG. 5, the non-contact power feeding device 10 includes a housing (housing) 12 having a recess 12 a that can accommodate at least a part of a portable electronic device 80 that is an example of a power feeding target device, and a housing 12. The first magnetic body 20, the first coil 25, the second magnetic body 30, and the second coil 35 housed (for example, integrated or held) are provided. The housing 12 is made of, for example, an insulating resin. The opening width W of the recess 12 a is shorter than the dimension L in the longitudinal direction of the portable electronic device 80. The first coil 25 and the second coil 35 constitute a feeding coil. The first coil 25 is obtained by winding a conducting wire around a first magnetic body 20 made of a magnetic material such as ferrite in a spiral shape, for example. The second coil 35 is obtained by winding a conducting wire around a second magnetic body 30 made of a magnetic material such as ferrite in a spiral shape, for example.

  A pair of magnetic pole portions (end portions of the first magnetic body 20) appearing in the first magnetic body 20 by energizing the first coil 25 oppose each other via the recess 12 a. Similarly, a pair of magnetic pole portions (end portions of the second magnetic body 30) appearing in the second magnetic body 30 by energizing the second coil 35 face each other through the recess 12a. As shown in FIG. 7, the first imaginary line x <b> 1 connecting a pair of magnetic pole parts appearing on the first magnetic body 20 (hereinafter also referred to as “magnetic pole part of the first magnetic body 20”) appears on the second magnetic body 30. A second imaginary line x2 connecting a pair of magnetic pole portions (hereinafter also referred to as “magnetic pole portions of the second magnetic body 30”) intersects each other when viewed from the opening direction of the concave portion 12a (that is, in plan view), preferably approximately. Orthogonal.

  As shown in FIGS. 6-8, the 1st magnetic body 20 and the 2nd magnetic body 30 are respectively arrange | positioned so that the recessed part 12a may be pinched | interposed into a semicircle. The first magnetic body 20 has a semi-annular shape that is larger than the second magnetic body 30, and has a first convex portion 21 and a second convex portion 22 that protrude toward the concave portion 12 a at both ends. The 1st convex part 21 and the 2nd convex part 22 strengthen the magnetic coupling of the magnetic pole parts of the 1st magnetic body 20, and the distance of the said magnetic pole parts is the distance between the magnetic pole parts of the 2nd magnetic body 30. Have a role to align.

  As shown in FIGS. 6 to 11, in the non-contact power transmission device 1, the non-contact power receiving device 90 built in the portable electronic device 80 includes a part of the portable electronic device 80 in the recess 12 a of the housing 12. In the accommodated state, it is located between the magnetic pole portions of the first magnetic body 20 and between the magnetic pole portions of the second magnetic body 30. 6 and 9, the housing 12 and the housing 81 are not shown. In the arrangement example 1 shown in FIGS. 6 to 8 and the arrangement example 2 shown in FIGS. 9 to 11, the arrangement angle of the portable electronic device 80 (that is, the non-contact power receiving device 90) with respect to the recess 12a is 90 ° in plan view. It is different in different points and matches in other points.

  6 to 8, the magnetic flux generated between the magnetic pole portions of the first magnetic body 20 is linked to the power receiving coil 85 of the non-contact power receiving device 90, and the power receiving coil 85 is changed by the time change of the magnetic flux. The secondary battery 84 is charged by the generated electromotive force. 9 to 11, the magnetic flux generated between the magnetic pole portions of the second magnetic body 30 is linked to the power receiving coil 85 of the non-contact power receiving device 90, and the power receiving coil 85 is changed by the time change of the magnetic flux. The secondary battery 84 is charged by the generated electromotive force.

  As shown in FIGS. 12 to 15, the non-contact power receiving device 90 according to the third configuration example includes two power receiving coils 85 each having a conductive sheet spirally wound around a magnetic sheet 98 (a flexible magnetic body). The secondary battery 84 is provided on the outer peripheral surface over a half circumference. That is, the winding coil of the power receiving coil 85 is curved along the outer peripheral side surface of the secondary battery 84. The arrangement example 3 shown in FIGS. 16 to 18 is different from the arrangement example 1 shown in FIGS. 6 to 8 in that the non-contact power receiving device 90 is changed to the third configuration example shown in FIGS. And match in other respects. In the arrangement example 3 shown in FIGS. 16 to 18 and the arrangement example 4 shown in FIGS. 19 to 21, the arrangement angle of the portable electronic device 80 (that is, the non-contact power receiving device 90) with respect to the recess 12 a is 90 ° in plan view. It is different in different points and matches in other points.

  In the arrangement example 3 shown in FIGS. 16 to 18, the magnetic flux generated between the magnetic pole portions of the second magnetic body 30 is linked to the power receiving coil 85 of the non-contact power receiving device 90, and the power receiving coil 85 is changed by the time change of the magnetic flux. The secondary battery 84 is charged by the generated electromotive force. In the arrangement example 4 shown in FIG. 19 to FIG. 21, the magnetic flux generated between the magnetic pole portions of the first magnetic body 20 is linked to the power receiving coil 85 of the non-contact power receiving device 90, and the power receiving coil 85 is changed by the time change of the magnetic flux. The secondary battery 84 is charged by the generated electromotive force.

  22A to 22D, the angle of the non-contact power receiving device 90 and the flow of magnetic flux in plan view will be described. FIG. 22A shows an arrangement corresponding to FIG. In FIG. 22A, the magnetic flux generated between the magnetic pole portions of the first magnetic body 20 is linked to the non-contact power receiving device 90. FIG. 22B is a diagram in which the non-contact power receiving device 90 is rotated about 30 ° clockwise from FIG. 22A. In FIG. 22B, the magnetic flux generated between the magnetic pole portions of the first magnetic body 20 is linked to the non-contact power receiving device 90. FIG. 22C is a diagram in which the non-contact power receiving device 90 is further rotated about 30 ° clockwise from FIG. 22B. In FIG. 22C, the magnetic flux generated between the magnetic pole portions of the second magnetic body 30 is linked to the non-contact power receiving device 90. FIG. 22D shows an arrangement corresponding to FIG. In FIG. 22D, the magnetic flux generated between the magnetic pole portions of the second magnetic body 30 is linked to the non-contact power receiving device 90. As described above, the magnetic flux generated between the magnetic pole portions relatively close to the magnetic flux inlets (both ends of the power receiving coil 85) of the non-contact power receiving device 90 is not dependent on the angle of the non-contact power receiving device 90 in plan view. The secondary battery 84 is charged with the induced electromotive force generated in the power receiving coil 85 by interlinking with the contact power receiving device 90 (the power receiving coil 85) and the change of the magnetic flux with time. In the case of FIG. 22B and FIG. 22C, the power supply efficiency is lower than that of FIG. 22A and FIG. 22D, but the secondary battery 84 can be charged without any problem.

  FIG. 23 is a circuit diagram of the contactless power supply device 10 and the portable electronic device 80 in the contactless power transmission device 1. In addition, in this circuit diagram, although the case where the magnetic flux which the 1st coil 25 generate | occur | produces is linked to the receiving coil 85, the magnetic flux which the 2nd coil 35 generate | occur | produces is received depending on the arrangement | positioning form of the non-contact power receiving apparatus 90. Interlink with the coil 85. The non-contact power supply apparatus 10 includes an AC power supply 18 and diodes D1 and D2 as a power transmission circuit for energizing the first coil 25 and the second coil 35. The AC power source 18 generates a high-frequency AC voltage and supplies an AC current. The forward current supplied from the AC power supply 18 is supplied to the first coil 25 via the diode D1, while being blocked from the second coil 35 by the diode D2. The negative current supplied from the AC power supply 18 is supplied to the second coil 35 via the diode D2, while being blocked from the first coil 25 by the diode D1. Thus, the first coil 25 and the second coil 35 are energized alternately (at different timings). Specifically, among the alternating current of each cycle supplied from the alternating current power supply 18, the current during the period from time T <b> 0 to T <b> 1 (first half of the cycle) shown in FIG. 24 flows to the first coil 25 and flows to the second coil 35. Does not flow, and the current (second half of the period) from time T1 to T2 flows through the second coil 35 and does not flow through the first coil 25.

  According to the present embodiment, the following effects can be achieved.

(1) In the non-contact power transmission device 1, the non-contact power feeding device 10 is configured so that the first magnetic body 20, the first coil 25, the second magnetic body 30, and the second coil 35 cross each other inside the recess 12 a of the housing 12. Since magnetic fluxes in two different directions are generated, contactless power transmission can be reliably performed even when the arrangement angle of the contactless power receiving device 90 in plan view changes as shown in FIGS. 22 (A) to 22 (D). . For this reason, it is not necessary to finely regulate the angle of the portable electronic device 80 in a plan view due to the shape of the concave portion 12a, and the user can arrange the portable electronic device 80 in the concave portion 12a having a sufficient size without contact. The secondary battery 84 can be charged. That is, it is easy to appropriately arrange the portable electronic device 80 (the device to be fed) in the non-contact power feeding apparatus 10 (so that non-contact power feeding is possible), and the burden on the user is small and the convenience is high.

(2) With the circuit illustrated in FIG. 23, the first coil 25 and the second coil 35 are energized at different timings to suppress mixing of the magnetic flux generated by both coils in the recess 12a, and cross each other across the recess 12a. Magnetic fluxes in two different directions can be reliably generated.

(3) Due to the rectifying action of the diodes D1 and D2, a positive current supplied from the AC power supply 18 is supplied to the first coil 25 and a negative current is supplied to the second coil 35. The circuit configuration for energizing the two coils 35 at different timings is simple.

(4) Since the first magnetic body 20 has the first convex portion 21 and the second convex portion 22 projecting toward the concave portion 12a at both ends, the magnetic coupling between the magnetic pole portions of the first magnetic body 20 is strengthened. The In addition, since the distance between the magnetic pole portions is approximately equal to the distance between the magnetic pole portions of the second magnetic body 30, the balance of the magnetic flux generated between the magnetic pole portions (the magnetic flux in the recess 12a) is improved.

(5) As shown in FIG. 5, the opening width W of the recess 12 a is shorter than the dimension L in the longitudinal direction of the portable electronic device 80, and therefore the posture in which contactless power feeding is not possible (the entrance of the magnetic flux of the contactless power receiving device 90 and It is possible to prevent the non-contact power receiving device 90 from being disposed in the recess 12a in a posture in which a virtual line connecting the outlets is in the vertical direction.

Embodiment 2
FIG. 25 is a front sectional view of non-contact power transmission apparatus 2 according to Embodiment 2 of the present invention. The non-contact power transmission device 2 of the present embodiment is different from that of the first embodiment in that the non-contact power feeding device 10 includes the auxiliary coil 11 and the bobbin 13, and the other points match. The auxiliary coil 11 is formed by winding a conducting wire around a bobbin 13 and is accommodated (for example, integrated or held) in the casing 12, and spirals around the recess 12 a in the casing 12. The auxiliary coil 11 may be used supplementarily for non-contact power feeding or may be used for communication with the portable electronic device 80. The present embodiment can achieve the same effects as those of the first embodiment.

Embodiment 3
FIG. 26 is a front sectional view of the non-contact power transmission apparatus 3 according to Embodiment 3 of the present invention. The non-contact power transmission device 3 of the present embodiment is different from that of the first embodiment in that the non-contact power feeding device 10 includes an additional coil 16 and a flat plate-like magnetic body 17. Match. The additional coil 16 is accommodated (for example, integrated or held) in the housing 12 and circulates in a plane (spiral shape) in the housing 12 at a position facing the bottom of the recess 12a. The flat magnetic body 17 (sheet-like or plate-like magnetic body) is provided on the side of the additional coil 16 opposite to the bottom of the recess 12a. The additional coil 16 may be supplementarily used for non-contact power feeding or may be used for communication with the portable electronic device 80. The additional coil 16 may coexist with the auxiliary coil 11 of FIG. The present embodiment can achieve the same effects as those of the first embodiment.

Embodiment 4
A fourth embodiment of the present invention will be described with reference to FIGS. 27, the magnetic body group and the coil group housed in the housing 12 are shown in more detail in FIGS. 28, 29 and 31, the housing 12 and the housing 81 are not shown. The arrangement example shown in FIG. 31 is different from the arrangement example shown in FIG. 28 in that the arrangement angle of the portable electronic device 80 (that is, the non-contact power receiving device 90) with respect to the recess 12a differs by 90 ° in plan view. And match in other respects.

  The magnetic body set in the present embodiment includes a first portion 20a and a second portion 20b that constitute the first magnetic body, a third portion 30a and a fourth portion 30b that constitute the second magnetic body, and the first portion 20a. It consists of the cyclic | annular 3rd magnetic body 40 which connects the 4th part 30b mutually. The first portion 20a and the second portion 20b are rod-like portions that protrude from the third magnetic body 40 toward the concave portion 12a and whose end faces face each other via the concave portion 12a. Similarly, the third portion 30a and the fourth portion 30b are rod-shaped portions that protrude from the third magnetic body 40 toward the concave portion 12a and whose end faces face each other via the concave portion 12a. An imaginary line connecting the first portion 20a and the second portion 20b and an imaginary line connecting the third portion 30a and the fourth portion 30b are substantially orthogonal to each other.

  The coil set in the present embodiment includes a first winding portion 25a and a second winding portion 25b that constitute the first coil, and a third winding portion 35a and a fourth winding portion 35b that constitute the second coil. Including. The first winding portion 25a is obtained by winding a conducting wire around the first portion 20a. The second winding portion 25b is obtained by winding a conducting wire around the second portion 20b. The third winding portion 35a is obtained by winding a conducting wire around the third portion 30a. The fourth winding portion 35b is obtained by winding a conductive wire around the fourth portion 30b. The first winding portion 25a and the second winding portion 25b are connected to each other (for example, connected in series) so as to generate magnetic fields in the same direction. Similarly, the third winding portion 35a and the fourth winding portion 35b are connected to each other (for example, connected in series) so as to generate magnetic fields in the same direction.

  The principle of contactless power transmission in the present embodiment is the same as that in the first embodiment. The present embodiment can achieve the same effects as those of the first embodiment. In addition, this embodiment is advantageous when the height of the housing 12 is desired to be suppressed as compared with the first embodiment because the dimension of the magnetic body set in the height direction is small. Also in this embodiment, at least one of the auxiliary coil 11 in FIG. 25 and the additional coil 16 in FIG. 26 may be added.

  The present invention has been described above by taking the embodiment as an example. However, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. Hereinafter, modifications will be described.

  In the first embodiment, the case where both the first magnetic body 20 and the second magnetic body 30 are arranged to sandwich the recess 12a from below is illustrated, but either the first magnetic body 20 or the second magnetic body 30 is the recess 12a. May be arranged to be sandwiched from the side. FIG. 32 shows an example in which the first magnetic body 20 sandwiches the recess 12a from the side. The configuration of the magnetic body set shown in FIG. 32 is that the first magnetic body 20 is rotated by 90 ° about both ends of the first magnetic body 20 as a fulcrum, and the first convex portion of the first magnetic body 20 is compared with that of FIG. 21 and the 2nd convex part 22 differ, and it differs in other points. When the first convex portion 21 and the second convex portion 22 are eliminated, the magnetic coupling between the magnetic pole portions of the first magnetic body 20 is weakened, but non-contact power transmission is possible in principle. In FIG. 32, at least one end of at least one of the first magnetic body 20 and the second magnetic body 30 may be provided with a protrusion that protrudes toward the recess 12a.

  In Embodiment 1, the case where both the first magnetic body 20 and the second magnetic body 30 have a semicircular arc shape is illustrated, but either or both of the first magnetic body 20 and the second magnetic body 30 are U-shaped. Alternatively, it may be V-shaped. FIG. 33 shows an example in which both the first magnetic body 20 and the second magnetic body 30 are U-shaped. In FIG. 33, at least one end of each of the first magnetic body 20 and the second magnetic body 30 may be provided with a protruding portion that protrudes toward the recessed portion 12a.

  In the first embodiment, the example in which the convex portions are not provided at both end portions of the second magnetic body 30 has been described. However, as shown in FIG. 34, the third convex portions projecting toward the concave portion 12a at both end portions of the second magnetic body 30. The part 31 and the fourth convex part 32 may be provided. In the first embodiment, the example in which the first coil 25 and the second coil 35 are provided in the annular portions of the first magnetic body 20 and the second magnetic body 30 has been described. However, as shown in FIG. The first winding portion 25a and the second winding portion 25b to be configured are provided on the first convex portion 21 and the second convex portion 22 of the first magnetic body 20, and the third winding portion 35a and the second winding portion constituting the second coil are provided. The four winding portions 35 b may be provided on the third convex portion 31 and the fourth convex portion 32 of the second magnetic body 30. According to the configuration of FIG. 34, both the magnetic coupling between the magnetic pole portions of the first magnetic body 20 and the magnetic coupling between the magnetic pole portions of the second magnetic body 30 are enhanced, and the efficiency of non-contact power feeding is enhanced.

  In the fourth embodiment, as shown in FIG. 29, the example in which four convex portions protruding from the annular third magnetic body 40 toward the concave portion 12a are provided at 90 ° intervals, but the number of convex portions is six. The even number above may be used. FIG. 35 shows an example in which there are six convex portions 41 protruding from the third magnetic body 40 toward the concave portion 12a at intervals of 60 °. FIG. 36 shows an example in which there are eight convex portions 41 at 45 ° intervals. In any case, each of the convex portions 41 is provided with a winding portion 42 that constitutes a part of the feeding coil, and the pair of winding portions 42 having a common winding axis is energized in an arbitrary order, so that the inside of the concave portion 12a is obtained. Magnetic fluxes in 3 to 4 directions different from each other can be generated. In the fourth embodiment, the example in which the third magnetic body 40 has a closed ring shape has been described. However, as shown in FIG. 37, the third magnetic body 40 may have a ring shape in which a part thereof is cut out. Good.

  In the embodiment, the example in which only a part of the portable electronic device 80 is accommodated in the recess 12a has been described. However, the portable electronic device may be a type in which the portable electronic device 80 is hooked or inserted into the ear. You may accommodate 80 whole in the recessed part 12a.

1-4 Non-contact power transmission device, 10 Non-contact power feeding device, 11 Auxiliary coil, 12 Housing, 12a Recess, 13 Bobbin, 16 Additional coil, 17 Flat magnetic body, 18 AC power source, 20 First magnetic body, 20a 1st part, 20b 2nd part, 21 1st convex part, 22 2nd convex part, 25 1st coil, 25a 1st winding part, 25b 2nd winding part, 30 2nd magnetic body, 30a 3rd part , 30b 4th part, 31 3rd convex part, 32 4th convex part, 35 2nd coil, 35a 3rd winding part, 35b 4th winding part, 40 3rd magnetic body, 41 convex part, 42 winding Part, 80 portable electronic device, 81 housing, 82 cable, 83 insertion part, 84 secondary battery, 85 power receiving coil, 86 case, 86a collar part, 87 lid, 87a collar part, 88, 89a, 89b magnetic sheet, 90 Non-contact Power receiving device, 92 DC-DC converter (voltage conversion circuit), 93 Power receiving circuit, 94 Charging circuit, 95 Main body, 98 Magnetic sheet

Claims (16)

A housing having a recess capable of accommodating at least a part of the power supply target device;
A first magnetic body, a second magnetic body, and a feeding coil housed in the housing,
The power supply coil includes a first coil in which a conducting wire is wound around the first magnetic body, and a second coil in which a conducting wire is wound around the second magnetic body,
A pair of magnetic pole portions appearing in the first magnetic body by energizing the first coil are opposed to each other through the recess,
A pair of magnetic pole portions appearing in the second magnetic body by energizing the second coil are opposed to each other through the recess,
A first imaginary line connecting the pair of magnetic pole portions appearing in the first magnetic body and a second imaginary line connecting the pair of magnetic pole portions appearing in the second magnetic body are viewed from the opening direction of the recess. Non-contact power feeding devices that cross each other.   The contactless power feeding device according to claim 1, wherein the first and second virtual lines are substantially orthogonal to each other when viewed from the opening direction of the recess.   The non-contact power feeding device according to claim 1 or 2, wherein the first and second magnetic bodies are respectively disposed so as to sandwich the concave portion.   The non-contact power feeding device according to claim 3, wherein the first magnetic body has first and second convex portions protruding toward the concave portion at both ends.   5. The non-contact power feeding device according to claim 4, wherein the second magnetic body has third and fourth convex portions projecting toward the concave portion at both end portions. The first coil includes a first winding portion in which a conductive wire is wound around the first convex portion, and a second winding portion in which a conductive wire is wound around the second convex portion,
The second coil includes a third winding portion in which a conductive wire is wound around the third convex portion, and a fourth winding portion in which a conductive wire is wound around the fourth convex portion,
The first and second winding parts are connected to each other so as to generate magnetic fields in the same direction,
The non-contact power feeding device according to claim 5, wherein the third and fourth winding sections are connected to each other so as to generate magnetic fields in the same direction. The first magnetic body has rod-shaped first and second portions whose end faces face each other through the recess,
The second magnetic body has rod-shaped third and fourth portions whose end faces face each other through the recess,
A third magnetic body interconnecting the first to fourth portions;
The first coil includes a first winding portion in which a conducting wire is wound around the first portion, and a second winding portion in which a conducting wire is wound around the second portion,
The second coil includes a third winding portion in which a conducting wire is wound around the third portion, and a fourth winding portion in which a conducting wire is wound around the fourth portion,
The first and second winding parts are connected to each other so as to generate magnetic fields in the same direction,
The non-contact power feeding device according to claim 1, wherein the third and fourth winding sections are connected to each other so as to generate magnetic fields in the same direction.   The non-contact electric power feeder as described in any one of Claim 1 to 7 provided with the power transmission circuit which supplies with electricity to the said 1st and 2nd coil at a mutually different timing.   The power transmission circuit includes a power supply device that generates an alternating current, wherein a positive current of the alternating current is passed through the first coil, and a negative current of the alternating current is passed through the second coil. The non-contact power feeding device according to 8.   The non-contact electric power feeder as described in any one of Claim 1 to 9 provided with the auxiliary coil which circulates around the said recessed part helically in the said housing | casing.   The non-contact electric power feeder as described in any one of Claim 1 to 10 provided with the additional coil provided in the position which opposes the bottom part of the said recessed part in the said housing | casing planarly.   The non-contact electric power feeder of Claim 11 provided with a sheet-like or plate-shaped magnetic body on the opposite side to the bottom part of the said recessed part of the said additional coil. A contactless power supply device according to any one of claims 1 to 12, and a portable electronic device at least partially housed in the recess of the contactless power supply device,
The portable electronic device is a contactless power transmission device having a contactless power receiving device including a secondary battery and a power receiving coil.   The contactless power transmission device according to claim 13, wherein an opening width of the concave portion is shorter than a dimension in a longitudinal direction of the portable electronic device.   The contactless power transmission device according to claim 13 or 14, wherein the power receiving coil has a winding axis that is substantially parallel to a thickness direction of the secondary battery and spirals around the secondary battery.   The contactless power transmission device according to claim 13 or 14, wherein the power receiving coil has a winding axis that is curved along an outer peripheral side surface of the secondary battery.

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