JP2017063521A - Power receiving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable charge with sufficient power transmission efficiency even when positioning accuracy of a power receiving device with respect to a power feeding device is low.SOLUTION: The power receiving device includes: a power receiving coil mechanism 2 that receives electricity by a magnetic field; a power supply coil mechanism 3 having a magnetic field generating surface 3a with a coil diameter larger than that of coil surfaces 2a and 2b of the power receiving coil mechanism 2 and being formed so that a magnetic field generating region of a curved magnetic force line in the magnetic field generating surface 3a expands more than a magnetic field generating region of a magnetic force line that travels straight; and a magnetic member 4 disposed in the power receiving coil mechanism 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power supply / reception device that receives and supplies power without contact.

  Conventionally, a configuration has been disclosed in which power is wirelessly transmitted from a power feeding device to a power receiving device and a secondary battery of the power receiving device is charged with power (Patent Documents 1 to 6). These wireless power transmissions are configured to increase the power transmission efficiency under conditions in which the power supply coil, the power reception coil, and the magnetic member are adjusted in coil diameter, arrangement, etc., and the power supply device and the charging device are set in a predetermined positional relationship. ing.

JP 2012-2222989 A JP 2013-233962 A JP2013-240260A JP 2014-183660 A JP 2014-204452 A JP 2014-209913 A

  By the way, since it is necessary to position the power receiving device in a predetermined position and a predetermined posture when trying to set the power receiving device in a predetermined positional relationship with respect to the power feeding device as in the past, handling of the power receiving device is low. It is easy to become. In particular, when the power receiving device is downsized, such as a portable device, the handleability is significantly reduced. Therefore, it is desired that charging can be performed with sufficient power transmission efficiency even if the positioning accuracy of the power receiving device with respect to the power feeding device is low.

  Therefore, an object of the present invention is to provide a power supply / reception device that can be charged with sufficient power transmission efficiency even if the positioning accuracy of the power reception device with respect to the power supply device is low.

  The present invention is a power supply / reception device, and includes a power receiving coil mechanism that receives power by a magnetic field, and a magnetic field generating surface having a coil diameter larger than a coil diameter of the power receiving coil mechanism, and a magnetic field of magnetic field lines that are curved on the magnetic field generating surface. A power supply coil mechanism formed so as to be larger than a magnetic field generation region of magnetic field lines in which the generation region goes straight; and a magnetic member disposed in the power reception coil mechanism.

  According to the above configuration, the magnetic field generation surface of the power supply coil mechanism has a coil diameter larger than the coil diameter of the power reception coil mechanism, and the magnetic field generation region of the curved magnetic field lines is expanded with respect to the power reception coil mechanism. Even if the power receiving coil mechanism is positioned at an arbitrary position on the magnetic field generation surface of the power feeding coil mechanism, there is a high possibility that many curved magnetic fluxes from the power feeding coil mechanism are linked to the power receiving coil mechanism.

  Further, in the power receiving coil mechanism, since the magnetic member is disposed, the mutual inductance is increased. Thereby, as for the receiving coil mechanism, the magnetic flux density is increased by the magnetic member, and the magnetic field strength is increased. Therefore, the magnetic member increases the magnetic field strength of the receiving coil mechanism, thereby maintaining the charging characteristics in a high state and receiving more power than desired in the receiving coil mechanism in a state where the degree of freedom of arrangement of the receiving coil mechanism is increased. It is easy to make.

  The magnetic member in the present invention may be disposed only in the power receiving coil mechanism among the power receiving coil mechanism and the power feeding coil mechanism.

  According to the above configuration, the magnetic member is arranged only in the power receiving coil mechanism, so that the magnetic field generation region of the magnetic force lines moving straight on the magnetic field generation surface is compared with the case where the magnetic member is arranged in the power feeding coil mechanism. In addition, it is limited to a narrow area at the center of the magnetic field generating surface. As a result, the magnetic field generation region of the magnetic field lines that are curved on the magnetic field generation surface can be more easily expanded than the magnetic field generation region of the magnetic field lines that travel straight.

  In the magnetic member of the power receiving coil mechanism according to the present invention, the power receiving coil mechanism may be disposed in an intermediate portion between one end side and the other end side of the magnetic member.

  According to said structure, even if it is a case where any side of the one end side and other end side of a magnetic member is made into the attitude | position which approaches the magnetic field generation surface of a feed coil mechanism, between one end side and the other end side of a magnetic member Since the power receiving coil mechanism is located in the middle portion, the positional relationship between one coil surface of the power receiving coil mechanism and the other coil surface with respect to the magnetic field generation surface of the power feeding coil mechanism is significantly different due to the presence of the magnetic member. There is nothing to do. As a result, there is a significant difference in the charging characteristics of the magnetic member between when the coil surface on one side of the power receiving coil mechanism faces the magnetic field generation surface and when the coil surface on the other side of the power receiving coil mechanism faces the magnetic field generation surface. Therefore, the freedom degree of the attitude | position at the time of arrange | positioning a receiving coil mechanism with respect to a magnetic field generation surface can be raised.

  In the power supply / reception device according to the present invention, the power reception coil mechanism includes a power reception coil and a power reception resonator, and the power supply coil mechanism transmits power by magnetic field resonance between the power supply coil and the power reception resonator. And the power receiving coil mechanism may be arranged at an intermediate portion between one end side and the other end side of the power receiving coil.

  According to said structure, the receiving coil and receiving resonator in a receiving coil mechanism are arrange | positioned in the intermediate part of the one end side and other end side of a magnetic member, and also a receiving resonator is arrange | positioned in the intermediate part of a receiving coil It becomes the composition which was done. As a result, even if either one of the one end side and the other end side of the magnetic member is brought into a posture approaching the magnetic field generation surface of the power feeding coil mechanism, one coil of the power receiving resonator and the power receiving coil mechanism with respect to the magnetic field generation surface The positional relationship between the surface and the other coil surface is not significantly different. Thus, the power transmission characteristics of the power transmission and the charging by the magnetic member are performed when the coil surface on one side of the power receiving coil mechanism faces the magnetic field generation surface and when the coil surface on the other side of the power receiving coil mechanism faces the magnetic field generation surface. Since there is no significant difference in characteristics, the degree of freedom in posture when the power receiving coil mechanism is arranged with respect to the magnetic field generation surface can be increased.

The present invention is a power supply / reception device, and includes a driving device having a power receiving coil mechanism for receiving power by a magnetic field, a base member having a mounting surface on which the driving device can be mounted, and an opposing arrangement to the mounting surface. And a charger having a feeding coil mechanism for generating the magnetic field,
The magnetic field generation surface of the power feeding coil mechanism has a coil diameter larger than the coil diameter of the power receiving coil mechanism, and the driving device is configured so that a part of the driving device is located on a peripheral portion of the mounting surface. The power receiving coil mechanism is formed so as to be positioned on the magnetic field generation region of the curved magnetic field lines on the magnetic field generation surface.

  In the above configuration, in the magnetic field generation region of the magnetic flux that goes straight, when the driving device is placed in a posture in which the coil surface of the power receiving coil mechanism is parallel to the magnetic flux, the power generation of the power receiving coil mechanism is stopped. However, according to the above configuration, since the power receiving coil mechanism is arranged so as to avoid the magnetic field generation region, it is possible to reduce the possibility that the power receiving coil mechanism does not receive power.

The present invention is a power supply / reception device, and includes a driving device having a power receiving coil mechanism for receiving power by a magnetic field, a base member having a mounting surface on which the driving device can be mounted, and an opposing arrangement to the mounting surface. And a feeding coil mechanism having a magnetic field generation surface for generating the magnetic field and formed so that a magnetic field generation region of a curved magnetic force line on the magnetic field generation surface is larger than a magnetic field generation region of a magnetic force line that travels straight. With a charger,
The magnetic field generation surface of the power feeding coil mechanism has a coil diameter larger than the coil diameter of the power receiving coil mechanism, and the power receiving coil mechanism is located in an intermediate portion between one end side and the other end side of the driving device. The receiving coil mechanism is positioned on the magnetic field generation region of the magnetic field lines that are curved on the magnetic field generation surface under the condition that the magnetic member is arranged in a manner and a part is positioned on the peripheral portion of the placement surface. It is formed as follows.

  According to the above configuration, the degree of freedom of the arrangement of the power receiving coil mechanism when charging the power receiving coil mechanism and the degree of freedom of the posture of the power receiving coil mechanism when arranged can be expanded. On the other hand, it becomes possible to place easily without worrying about the positioning and posture at the time of placing.

  The said base member in this invention may have the side peripheral surface which inclines in the outer peripheral direction from the peripheral part of the said mounting surface, and moves the said drive device to the inner peripheral direction of the said mounting surface by sliding.

  According to said structure, the side peripheral surface in a base member inclines in an outer peripheral direction from a peripheral part rather than a mounting surface, and the size of the side peripheral surface on the side away from a mounting surface is larger than a mounting surface. Will also be big. Even when the driving device is placed so as to come into contact with the side circumferential surface, the driving device slides on the side circumferential surface in the inner circumferential direction and moves onto the placement surface. As a result, the side peripheral surface and the mounting surface become a mounting area, and it is possible to mount the driving device on the mounting surface by performing an operation of mounting the driving device on the mounting region. The mounting work on the mounting surface becomes easy.

  The driving device according to the present invention may be formed in an outer shape in which the coil surface of the power receiving coil mechanism is opposed to the magnetic field generation surface of the power feeding coil mechanism by its own weight.

  According to the above configuration, even when the driving device is mounted on the base member in any posture, the coil surface of the power receiving coil mechanism is opposed to the magnetic field generation surface of the power feeding coil mechanism by the weight of the driving device. Therefore, workability when the drive device is placed on the base member can be improved.

  The drive device in the present invention may be a hearing aid.

  The present invention is a power receiving device including a power receiving coil mechanism disposed opposite to a power feeding coil mechanism having a magnetic field generation surface that is expanded from a magnetic field generation region of a magnetic field line in which a magnetic field generation region of a curved magnetic force line goes straight, The power receiving coil mechanism includes a magnetic member having a coil diameter smaller than a magnetic field generation surface of the power feeding coil mechanism, and is disposed only in the power receiving coil mechanism among the power feeding coil mechanism and the power receiving coil mechanism. Yes.

  According to the above configuration, since the receiving coil mechanism has a smaller coil diameter than the magnetic field generation surface of the feeding coil mechanism, the magnetic field generation surface of the feeding coil mechanism has a coil diameter larger than the coil diameter of the receiving coil mechanism. Furthermore, even if the receiving coil mechanism is located at an arbitrary position on the magnetic field generation surface of the feeding coil mechanism, the magnetic field generation region of the magnetic field lines that are further curved is enlarged with respect to the receiving coil mechanism. There is a high possibility that the curved magnetic flux interlinks with the receiving coil mechanism.

  Further, in the power receiving coil mechanism, since the magnetic member is disposed, the mutual inductance is increased. Thereby, as for the receiving coil mechanism, the magnetic flux density is increased by the magnetic member, and the magnetic field strength is increased. Therefore, the magnetic member increases the magnetic field strength of the receiving coil mechanism, thereby maintaining the charging characteristics in a high state and receiving more power than desired in the receiving coil mechanism in a state where the degree of freedom of arrangement of the receiving coil mechanism is increased. It is easy to make.

  The present invention is a power feeding device in which a power receiving coil mechanism that has a magnetic member and receives power by a magnetic field is opposed to each other, and has a magnetic field generation surface having a coil diameter larger than the coil diameter of the power receiving coil mechanism, A feeding coil mechanism is provided that is formed so that the magnetic field generation region of the curved magnetic field lines on the magnetic field generation surface is larger than the magnetic field generation region of the magnetic field lines that advance straight.

  According to the above configuration, the magnetic field generation surface of the power supply coil mechanism has a coil diameter larger than the coil diameter of the power reception coil mechanism, and the magnetic field generation region of the curved magnetic field lines is expanded with respect to the power reception coil mechanism. Even if the power receiving coil mechanism is located at an arbitrary position on the magnetic field generation surface of the power feeding coil mechanism, it is possible to increase the possibility that many curved magnetic fluxes from the power feeding coil mechanism are linked to the power receiving coil mechanism. .

  The power feeding device according to the present invention may not include a magnetic member.

  According to the above configuration, the magnetic field generation region of the curved magnetic field lines is further enlarged with respect to the power receiving coil mechanism, so that a large number of curved magnetic fluxes from the power feeding coil mechanism may be linked to the power receiving coil mechanism. Can be further enhanced.

  According to the present invention, charging can be performed with sufficient power transmission efficiency even if the positioning accuracy of the power receiving device with respect to the power feeding device is low.

It is a block diagram of a power supply / reception device. It is explanatory drawing which shows the charge condition of a receiving coil mechanism. It is a block diagram of a power supply / reception device. It is explanatory drawing which shows the charge condition of a receiving coil mechanism. It is explanatory drawing which shows the charge condition of a receiving coil mechanism. It is explanatory drawing which shows the state in which the drive device was mounted in the base member. It is explanatory drawing which shows the shape and gravity center position of a drive device. It is explanatory drawing which shows the arrangement position of the receiving coil mechanism in a drive device. It is a block diagram of a drive device. It is explanatory drawing which shows the state in which the drive device was mounted in the base member.

An embodiment of the present invention will be described with reference to the drawings.
(Power supply / reception device 1: Overview)
As shown in FIG. 1, a power receiving and feeding device 1 according to this embodiment includes a power receiving coil mechanism 2 that receives power by a magnetic field, a power feeding coil mechanism 3 that has a magnetic field generating surface 3 a that generates a magnetic field, and a power receiving coil mechanism 2. The magnetic member 4 is disposed. The feeding coil mechanism 3 has a magnetic field generation surface 3a having a coil diameter larger than the coil diameter of the power reception coil mechanism 2, and a magnetic field generation region (hereinafter referred to as a bending generation region) of a curved magnetic field line on the magnetic field generation surface 3a. It is formed so as to be larger than the magnetic field generation region (hereinafter referred to as a straight generation region) of the magnetic field lines. The coil diameter of the magnetic field generation surface 3a of the power reception coil mechanism 2 and the power supply coil mechanism 3 is such that the coil surfaces 2a and 2b of the power reception coil mechanism 2 and the magnetic field generation surface 3a of the power supply coil mechanism 3 are circular, elliptical, or rectangular. The average diameter of the coil surfaces 2a and 2b of the power receiving coil mechanism 2 and the magnetic field generation surface 3a of the power feeding coil mechanism 3 is meant.

  As shown in FIG. 2, the power supply / reception device 1 configured as described above is curved on the magnetic field generation surface 3 a of the power reception coil mechanism 2 by the bending generation region A being expanded more than the straight-ahead generation region B. A magnetic field composed of a magnetic flux in which magnetic lines of force are gathered is expanded. Therefore, the magnetic field generation surface 3a of the power feeding coil mechanism 3 has a coil diameter larger than the coil diameter of the power receiving coil mechanism 2, and the magnetic field generation region of the curved magnetic flux is further expanded with respect to the power receiving coil mechanism 2. Even if the power receiving coil mechanism 2 is arranged at an arbitrary position on the magnetic field generation surface 3 a of the power feeding coil mechanism 3, there is a possibility that many curved magnetic fluxes from the power feeding coil mechanism 3 are linked to the power receiving coil mechanism 2. Get higher.

  Moreover, in the receiving coil mechanism 2, since the magnetic member 4 is arrange | positioned, the mutual inductance is increasing. Thereby, as for the receiving coil mechanism 2, magnetic flux density is increased by the magnetic member 4, and the magnetic field strength is raised. Accordingly, the magnetic member 4 increases the magnetic field strength of the power receiving coil mechanism 2 to maintain the charging characteristics in a high state, and in the state where the degree of freedom of arrangement of the power receiving coil mechanism 2 is increased, the power receiving coil receives more power than desired. It is easy for the mechanism 2 to receive power.

  As illustrated in FIG. 1, the power receiving coil mechanism 2 includes a power receiving coil 21 and a power receiving resonator 22 provided on the power receiving coil 21 side. On the other hand, the power supply coil mechanism 3 includes one or more power supply coils 31 and a power supply resonator 32 that is provided on the power supply coil 31 side and transmits power to the power reception resonator 22 by magnetic field resonance. Here, “magnetic field resonance” refers to causing a resonance phenomenon that is tuned at the resonance frequency between the power receiving resonator 22 and the power feeding resonator 323. Examples of the types of coils used for the power receiving coil 21, the power receiving resonator 22, the power feeding coil 31, and the power feeding resonator 32 include a spiral type, a solenoid type, and a loop type.

  In the present embodiment, a configuration in which power transmission between the power receiving coil mechanism 2 and the power feeding coil mechanism 3 is performed by a magnetic resonance method will be described, but the present invention is not limited to this. That is, as shown in FIG. 3, the power supply / reception device 1A is configured to perform power transmission between the power reception coil 21A of the power reception coil mechanism 2A and the power supply coil 31A of the power supply coil mechanism 3A by an electromagnetic induction method. Also good. However, in the electromagnetic induction system, the feeding coil mechanism is only the feeding coil, and the receiving coil mechanism is only the receiving coil.

(Power supply / reception device 1: positional relationship of each member)
As shown in FIG. 1, a magnetic member 4 is disposed on the inner peripheral side of the power receiving coil mechanism 2. The positional relationship in the axial direction between the power receiving coil mechanism 2 and the magnetic member 4 is not particularly limited, but the power receiving coil mechanism 2 is positioned at an intermediate portion between one end side and the other end side of the magnetic member 4. It is preferable that they are arranged. Here, the “intermediate portion” between the one end side and the other end side of the magnetic member 4 means an arbitrary portion excluding one end and the other end in a region sandwiched between the one end side and the other end side.

  Note that the axial positional relationship between the power receiving coil mechanism 2 and the magnetic member 4 is such that the power receiving coil mechanism 2 is positioned at the center between the one end side and the other end side of the magnetic member 4. preferable. Further, the axial positional relationship between the power receiving coil mechanism 2 and the magnetic member 4 is such that the coil surface 2a on one side of the power receiving coil mechanism 2 faces the magnetic field generating surface 3a and the coil surface on the other side of the power receiving coil mechanism 2. It is preferable that the charging characteristics of the magnetic member 4 are not significantly different between the case where 2b faces the magnetic field generating surface 3a. That is, the difference in charging characteristics due to the magnetic member 4 is preferably within 30%, and more preferably within 10%.

  According to the above configuration, even if either one of the one end side and the other end side of the magnetic member 4 is brought into a posture approaching the magnetic field generation surface 3 a of the power feeding coil mechanism 3, Since the power receiving coil mechanism 2 is located in the middle of the end side, the positional relationship between one coil surface 2a and the other coil surface 2b of the power receiving coil mechanism 2 with respect to the magnetic field generating surface 3a is due to the presence of the magnetic member 4. It will not be significantly different. Thus, the magnetic member 4 is used when the coil surface 2a on one side of the power receiving coil mechanism 2 faces the magnetic field generation surface 3a and when the coil surface 2b on the other side of the power receiving coil mechanism 2 faces the magnetic field generation surface 3a. Since there is no significant difference in charging characteristics, it is possible to increase the degree of freedom of the posture when the power receiving coil mechanism 2 is arranged with respect to the power feeding coil mechanism 3 (magnetic field generation surface 3a).

  In addition, the power receiving resonator 22 in the power receiving coil mechanism 2 is disposed so that the power receiving coil 21 is positioned on the inner peripheral side. That is, the power receiving coil mechanism 2 is configured such that the power receiving coil 21 is disposed between the power receiving coil 21 on the outermost peripheral side and the magnetic member 4 on the innermost peripheral side. Although the positional relationship in the axial direction between the power receiving resonator 22 and the power receiving coil 21 is not particularly limited, the power receiving resonator 22 is disposed in an intermediate portion between one end side and the other end side of the power receiving coil 21. It is preferable. In addition, as for the positional relationship in the axial direction between the power receiving resonator 22 and the power receiving coil 21, it is more preferable that the power receiving resonator 22 is arranged at the center between one end side and the other end side of the power receiving coil 21.

  According to the above configuration, the axial relationship among the power receiving resonator 22, the power receiving coil 21, and the magnetic member 4 is such that the power receiving coil mechanism 2 is disposed at an intermediate portion between one end side and the other end side of the magnetic member 4. In addition, the power receiving resonator 22 is disposed in an intermediate portion between the one end side and the other end side of the power receiving coil 21. As a result, even if one of the one end side and the other end side of the magnetic member 4 is brought into a posture approaching the magnetic field generating surface 3a of the power feeding coil mechanism 3, the power receiving resonator 22 and the power receiving coil with respect to the magnetic field generating surface 3a are provided. The positional relationship between one coil surface 2a and the other coil surface 2b of the mechanism 2 is not significantly different. Thereby, when one coil surface 2a of the receiving coil mechanism 2 faces the magnetic field generation surface 3a and when the other coil surface 2b of the receiving coil mechanism 2 faces the magnetic field generation surface 3a, Since there is no significant difference in the charging characteristics of the magnetic member 4, it is possible to increase the degree of freedom in posture when the power receiving coil mechanism 2 is arranged with respect to the magnetic field generating surface 3a.

  For example, as shown in FIG. 4, when the power receiving coil 21 is asymmetrically arranged on one end side of the magnetic member 4, there is a large difference in power generation efficiency depending on the direction of the power receiving coil mechanism 2 in the forward and reverse directions. However, as shown in FIG. 5, such a large difference does not occur when the power receiving resonator 22 and the power receiving coil 21 are symmetrically arranged in the intermediate portion of the magnetic member 4.

(Power supply / reception device 1: Magnetic member 4)
As shown in FIG. 1, the magnetic member 4 is formed in a cylindrical shape so that a secondary battery 10 and an electronic component described later can be accommodated on the inner peripheral side. The magnetic member 4 may have a cylindrical shape, a prismatic cylindrical shape such as a triangular prism shape, a quadrangular prism shape, or a polygonal prism shape, or a solid shape having various external shapes. The central axis of the magnetic member 4 is disposed so as to be orthogonal to the coil surfaces 2 a and 2 b at the center point of the coil surfaces 2 a and 2 b of the power receiving coil mechanism 2. That is, in the power receiving coil mechanism 2, the central axis of the magnetic member 4 is aligned with the coil central axis of the power receiving coil mechanism 2, and the distance between the side peripheral surface of the magnetic member 4 and the inner peripheral surface of the power receiving coil 21 is the entire circumference. Identical. Note that the central axis of the magnetic member 4 may intersect the coil central axis of the power receiving coil mechanism 2. The magnetic member 4 may be disposed on the outer peripheral side of the power receiving coil mechanism 2, or may be disposed on the inner peripheral side and the outer peripheral side of the power receiving coil mechanism 2.

  The magnetic member 4 is disposed only in the power receiving coil mechanism 2 among the power receiving coil mechanism 2 and the power feeding coil mechanism 3. According to this configuration, since the magnetic member 4 is disposed only in the power receiving coil mechanism 2, the straight travel generation region in the magnetic field generation surface 3 a is compared with the case where the magnetic member 4 is disposed in the power feeding coil mechanism 3. , The magnetic field generating surface 3a is limited to a narrow region. As a result, the curve generation region can be more easily enlarged than the straight travel generation region.

  The magnetic member 4 is made of a resin in which magnetic powder is dispersed. The resin used in the magnetic member 4 may be a thermosetting resin or a thermoplastic resin, and is not particularly limited. For example, if it is a thermosetting resin, an epoxy resin, a phenol resin, a melamine resin, a vinyl ester resin, a cyano ester resin, a maleimide resin, a silicon resin, etc. are mentioned. Examples of thermoplastic resins include acrylic resins, vinyl acetate resins, polyvinyl alcohol resins, and the like. In this embodiment, a resin mainly composed of an epoxy resin is used.

  Also, soft magnetic powder is used as the magnetic powder dispersed in the resin. The soft magnetic powder is not particularly limited, but pure Fe, Fe-Si, Fe-Al-Si (Sendust), Fe-Ni (permalloy), soft ferrite, Fe-based amorphous, Co-based amorphous, Fe -Co (permendule) or the like can be used. Further, the shape of the magnetic member 4 is also appropriately selected.

(Application example of power supply / reception device 1)
Next, the case where the power supply / reception device 1 is configured to supply power to the driving device 5 provided in the charger 7 by wireless transmission will be described.

  The power supply / reception device 1 includes a drive device 5 including a power receiving coil mechanism 2 that receives power by a magnetic field, and a charger 7 that supplies power to the drive device 5 by wireless transmission. The charger 7 includes a base member 6 having a mounting surface 6a on which the driving device 5 can be mounted, and a magnetic field generating surface 3a disposed to face the mounting surface 6a, and generates a magnetic field. And. The magnetic field generation surface 3 a of the power feeding coil mechanism 3 has a coil diameter larger than the coil diameter of the power receiving coil mechanism 2. The drive device 5 is formed so that the power receiving coil mechanism 2 is positioned in the bending generation region in the magnetic field generation surface 3a of the power feeding coil mechanism 3 under a condition that a part thereof is positioned on the peripheral edge of the placement surface 6a. .

  In the above configuration, when the drive device 5 is placed in a posture in which the coil surfaces 2a and 2b of the power receiving coil mechanism 2 are parallel to the magnetic flux in the straight traveling generation region, the power generation of the power receiving coil mechanism 2 is generated. Although it is stopped, according to the above configuration, the receiving coil mechanism 2 is arranged avoiding the magnetic field region, so that the possibility that the receiving coil mechanism 2 will not receive power is reduced. Can do.

  In the power supply / reception device 1, the drive device 5 and the charger 7 may be configured as follows. The charger 7 includes a base member 6 having a mounting surface 6a on which the driving device 5 can be mounted, a magnetic field generating surface 3a that is disposed opposite to the mounting surface 6a and generates a magnetic field, and the magnetic field generating surface 3a. And a feed coil mechanism 3 formed so that the curve generation region is larger than the straight travel generation region. The magnetic field generation surface 3 a of the power feeding coil mechanism 3 has a coil diameter larger than the coil diameter of the power receiving coil mechanism 2. The drive device 5 is formed so that the power receiving coil mechanism 2 is positioned on the curve generation region on the magnetic field generation surface 3a under the condition that a part of the drive device 5 is positioned on the periphery of the placement surface 6a.

  According to said structure, since the freedom degree of arrangement | positioning of the receiving coil mechanism 2 in the case of charging the receiving coil mechanism 2 and the freedom degree of the attitude | position of the receiving coil mechanism 2 when arrange | positioning can be expanded, the drive device 5 is a charger. 7 can be placed easily without worrying about the positioning and posture when placed on the base member 6.

(Application example of power supply / reception device 1: drive device 5)
As the driving device 5, a portable device is exemplified. Portable devices include both “handheld” devices (which can be held by hand) and “wearable devices (which can be worn on the body: human-mounted devices)”. Specifically, portable devices include portable computers (laptops, notebook computers, tablet PCs, etc.), headsets, cameras, audio / AV devices (portable music players, IC recorders, portable DVD players, etc.), computers ( Pocket computers, calculators), game consoles, computer peripherals (portable printers, portable scanners, portable modems, etc.), dedicated information devices (electronic dictionaries, electronic notebooks, electronic books, portable data terminals, etc.), portable communication terminals, voice communication terminals (Cell phones, PHS, satellite phones, third party radios, amateur radios, specified low power radios, personal radios, citizen radios, etc.), data communication terminals (cell phones, PHSs (feature phones / smart phones), pagers, etc.), Broadcast receiver (TV / radio), portable radio, Examples include portable TVs, One Seg, other devices (watches, pocket watches), hearing aids, handheld GPS, security buzzers, flashlights / penlights, battery packs, and the like. In addition, examples of the “hearing aid” include ear-hook type hearing aids, ear hole type hearing aids, and glasses type hearing aids. The driving device 5 may be a stationary device such as a personal computer.

  The driving device 5 is formed in an outer shape in which the coil surfaces 2 a and 2 b of the power receiving coil mechanism 2 are opposed to the magnetic field generation surface 3 a of the power feeding coil mechanism 3 by its own weight. As a result, the coil surfaces 2 a and 2 b of the power receiving coil mechanism 2 become the magnetic field generation surface 3 a of the power feeding coil mechanism 3 due to the weight of the driving device 5 regardless of the posture of the driving device 5 placed on the base member 6. Since it becomes the attitude | position which opposes, the workability | operativity in the case of mounting the drive device 5 in the base member 6 can be improved.

  As shown in FIG. 6, the case where the driving device 5 is an ear hole type hearing aid will be specifically described. The driving device 5 includes a housing 51 formed so as to be in contact with the peripheral surface of the ear hole. The casing 51 is formed in an ellipsoidal shape in which a longitudinal cross-sectional shape orthogonal to the insertion direction of the ear hole has a longitudinal direction and a lateral direction.

  As shown in FIG. 7, in the driving device 5, the center of the longitudinal section of the casing 51 and the center of gravity of the driving device 5 are eccentric in the short direction. And the both end walls of the longitudinal direction in the longitudinal cross section of the housing | casing 51 are formed in the shape rotated with dead weight by the effect | action of the eccentric gravity center. As a result, regardless of the posture of the driving device 5, a rotational force is applied to the housing 51 so that the eccentric direction of the center of gravity coincides with the vertical direction (gravity direction). It stops in a posture in which the wall surfaces at both ends in the direction are brought into contact with the placement surface 6a.

  The power receiving coil mechanism 2 is provided in the casing 51 of the driving device 5. The power receiving coil mechanism 2 is disposed so that the coil surfaces 2 a and 2 b face the wall surfaces of both end surfaces in the short direction in the longitudinal section of the housing 51. As a result, when the driving device 5 stops in a posture in which the wall surface in the short direction is in contact with the placement surface 6a due to its own weight, the coil surfaces 2a and 2b of the power receiving coil mechanism 2 are placed on the magnetic field generation surface 3a of the power feeding coil mechanism 3. Are designed to face each other.

  Moreover, the drive device 5 arrange | positions the receiving coil mechanism 2 in the center part of the transversal direction in a longitudinal cross section. Thus, even if the driving device 5 stops in a posture in which the mounting surface 6a is brought into contact with one of the wall surface in the longitudinal direction and the other wall surface in the longitudinal section, the power receiving coil received from the power feeding coil mechanism 3 The magnetic field strength of the mechanism 2 is set to be almost the same.

  As shown in FIG. 8, the drive device 5 has the power receiving coil mechanism 2 disposed on the rear end side in the insertion direction of the ear hole. The power receiving coil mechanism 2 is arranged at a position where the part of the casing 51 is located on the peripheral edge of the mounting surface 6a, and the power receiving coil mechanism 2 is located in the curve generation region A on the magnetic field generating surface 3a of the power feeding coil mechanism 3. Is formed so as to be positioned. More specifically, the tip 51a of the housing 51 in the ear hole insertion direction is positioned on the outer peripheral edge of the mounting surface 6a, and the longitudinal direction of the housing 51 is aligned with the radial direction of the mounting surface 6a. The power receiving coil mechanism 2 is disposed between the straight travel generation region B and the rear end portion 51 b of the casing 51. As a result, the receiving coil mechanism 2 is positioned in the curve generation region A regardless of the longitudinal direction of the driving device 5 placed on the placement surface 6a along the placement surface 6a. Become.

  The drive device 5 includes the above-described power receiving coil mechanism 2 and a power control circuit 91 to which power received by the power receiving coil mechanism 2 is supplied. The power control circuit 91 and the power receiving coil mechanism 2 are integrated as a power receiving module 9 together with the magnetic member 4. The power receiving module 9 is connected to the secondary battery 10.

  The power receiving module 9 will be described in detail. The power receiving module 9 is a power receiving device having a function of receiving power. The power receiving module 9 includes a power receiving coil mechanism 2 disposed opposite to a power feeding coil mechanism 3 having a magnetic field generating surface 3a that is larger than a magnetic field generating region of a magnetic force line in which a magnetic field generating region of a bending magnetic force line goes straight. The power receiving coil mechanism 2 has a smaller coil diameter than the magnetic field generation surface 3a of the power feeding coil mechanism 3, and the magnetic member 4 disposed only on the power receiving coil mechanism 2 is included in the power feeding coil mechanism 3 and the power receiving coil mechanism 2. I have.

  According to the above configuration, since the power receiving coil mechanism 2 has a smaller coil diameter than the magnetic field generation surface 3 a of the power feeding coil mechanism 3, the magnetic field generation surface 3 a of the power feeding coil mechanism 3 is smaller than the coil diameter of the power receiving coil mechanism 2. The receiving coil mechanism 2 is positioned at an arbitrary position on the magnetic field generating surface 3a of the feeding coil mechanism 3 by expanding the magnetic field generation region of the magnetic field lines having a large coil diameter and bending to the receiving coil mechanism 2. Even if it is done, the possibility that many curved magnetic fluxes from the feeding coil mechanism 3 are linked to the receiving coil mechanism 2 is increased.

  Moreover, in the receiving coil mechanism 2, since the magnetic member 4 is arrange | positioned, the mutual inductance is increasing. Thereby, as for the receiving coil mechanism 2, magnetic flux density is increased by the magnetic member 4, and the magnetic field strength is raised. Accordingly, the magnetic member 4 increases the magnetic field strength of the power receiving coil mechanism 2 to maintain the charging characteristics in a high state, and in the state where the degree of freedom of arrangement of the power receiving coil mechanism 2 is increased, the power receiving coil receives more power than desired. It is easy for the mechanism 2 to receive power.

(Application example of power supply / reception device 1: drive device 5: power control circuit 91)
As shown in FIG. 1, the power control circuit 91 is mounted on a circuit board. The circuit board is disposed in a magnetic field space formed by a resonance phenomenon so as to have a magnetic field strength smaller than that of other parts. Specifically, the power receiving coil mechanism 2 causes a space portion with a small magnetic field to appear at a position inside or near the power receiving coil mechanism 2 during power feeding using a resonance phenomenon, and this space portion is used as a circuit board placement location. . In the present embodiment, it is preferable that a space portion appears inside the magnetic member 4 and the circuit board is disposed together with the secondary battery 10 in this space portion. As a result, the drive device 5 can be reduced in size as a result of preventing malfunction and heat generation above a predetermined temperature by suppressing the generation of eddy currents due to the magnetic field in the circuit board. Details of the “space portion with a small magnetic field” will be described later.

  As shown in FIG. 9, the power control circuit 91 has a function of controlling charging of the secondary battery 10. The power control circuit 91 may be a circuit having a function of controlling discharge. The power control circuit 91 has a switch function for switching charging of the secondary battery 10 in the circuit.

  More specifically, the power control circuit 91 includes a rectification / stabilization unit 911 that outputs DC power by rectifying AC power supplied from outside via the power receiving coil mechanism 2 that outputs AC power, A charging unit 912 that supplies DC power output from the stabilization unit 911 to the secondary battery 10 with a charging voltage, a transformer 915 that performs signal processing, and a detection unit that detects input of power to the charging unit 912 917 and a switching control unit 916 that switches the transformer 915 from the operating state to the stopped state only when the detecting unit 917 detects the input of power to the charging unit 912. The transformer 915 is connected to the drive mechanism 11 that is operated by the charging power of the secondary battery 10.

  The rectification / stabilization unit 911 can use a rectification / stabilization IC. The rectification / stabilization IC is an IC in which various functions such as full-bridge synchronous rectification, voltage conditioning and wireless power control, and a protection function against voltage / current / temperature abnormalities are integrated on one chip. Note that when the power output from the power receiving coil mechanism 2 is DC power, the rectification / stabilization unit 911 is omitted.

  The charging unit 912 is an IC (charging circuit) for a constant current / constant voltage linear charger, and has a function for notifying that the charging current has decreased to a predetermined value of the set value, a charging end function by a timer, and thermal feedback. It has a charging current stabilization function, a chip temperature limiting function during high power operation and under high ambient temperature conditions, and the like.

  The transformer unit 915 is a transformer circuit that functions as a transformer unit that performs signal processing for converting the charging power of the secondary battery 10 into the driving power of the driving mechanism 11 and outputting it. The transformer 915 can apply a linear regulator as a step-down use, and can apply a switching regulator as a step-up and step-down use. Each of these regulators can be exemplified by a method of turning on and off current at high speed by a semiconductor element.

  The detection unit 917 is a detection circuit that outputs a detection signal indicating that DC power is output from the rectification / stabilization unit 911 to the charging unit 912. The detection unit 917 may be formed of an analog circuit such as a transistor. More specifically, the detection unit 917 connects the base terminal of the NPN transistor to the output power line between the rectification / stabilization unit 911 and the charging unit 912, and connects the emitter terminal to the ground. In addition, the collector terminal is connected to the positive side of the secondary battery 10 via a resistor, whereby the high impedance state is established and the collector terminal is connected to the input terminal of the switching control unit 916.

  As a result, when DC power is not output from the rectifying / stabilizing unit 911, the base terminal of the detecting unit 917 is at a low level and the emitter terminal and the collector terminal are in a non-conductive state. The signal is input to the input terminal of the switching control unit 916. On the other hand, when DC power is sent from the rectifying / stabilizing unit 911 to the charging unit 912 via the output power line, the base terminal becomes high level, and as a result, the collector terminal and the emitter terminal become conductive, and the collector terminal is grounded. It changes to a low level detection signal. As a result, when DC power is output from the rectification / stabilization unit 911 to the charging unit 912, a low-level detection signal is input to the input terminal of the switching control unit 916. Note that the detection unit 917 may be formed of a digital circuit.

  The switching control unit 916 stops the transformation unit 915 when a low level detection signal is input from the detection unit 917, while the high level detection signal is input (a low level detection signal is input). A switching control circuit that causes the transformer 915 to be in an activated state. In this embodiment, the low level detection signal is used as the stop condition for the transformer 915 and the high level detection signal is used as the operation condition for the transformer 915. However, the present invention is not limited to this. The signal may be the start condition of the transformer 915 and the high level detection signal may be the stop condition of the transformer 915.

  As a result, the power control circuit 91 prohibits the operation of the drive mechanism 11 when charging the secondary battery 10 and permits the operation of the drive mechanism 11 when charging is stopped. By being formed as an integrated circuit substrate that can be switched automatically depending on the presence or absence, it can be formed with high density with a simple circuit configuration.

(Application example of power supply / reception device 1: drive device 5: drive mechanism 11)
The drive mechanism 11 includes a mechanism that incorporates components such as a speaker and a motor that convert electric power into kinetic energy, a light emitting mechanism and illumination mechanism that incorporate components such as an LED light source and a laser light source that convert electric power into light energy, and a microcomputer. Although illustrated, all types of equipment that operates with electrical power are applicable. The power receiving coil mechanism 2 is configured to support wireless power feeding in which power is fed in a mechanically non-contact state. Examples of the wireless power feeding include an electromagnetic induction method and a magnetic field resonance method (magnetic resonance method).

(Application example of power supply / reception device 1: drive device 5: secondary battery 10)
As the secondary battery 10, all kinds of chargeable / dischargeable batteries can be applied. For example, lead acid battery, control valve type lead acid battery, lithium ion battery, lithium ion polymer battery, iron phosphate lithium ion battery, lithium / sulfur battery, titanic acid / lithium battery, nickel / cadmium battery, nickel / hydrogen rechargeable battery, nickel・ Secondary iron batteries, nickel / lithium batteries, nickel / zinc batteries, rechargeable alkaline batteries, sodium / sulfur batteries, redox flow batteries, zinc / bromine flow batteries, silicon batteries, silver-zinc batteries (Silver-Zinc), etc. The battery 10 can be exemplified.

  The nominal voltage of the nickel metal hydride secondary battery 10 is 1.2V to 1.4V, similar to the nominal voltage of the air battery that is the primary battery. Here, “nominal voltage” is a value determined as a measure of the voltage between the terminals obtained when the battery is used in a normal state. For a battery that is nearly fully charged, a terminal that is higher than the nominal voltage. A voltage can be obtained, but when discharging progresses or when a large current is supplied to the load, the terminal voltage is lower than the nominal voltage.

  As the secondary battery 10 whose nominal voltage exceeds the nominal voltage of the air battery, a lead storage battery, a control valve type lead storage battery, a lithium ion battery, a lithium polymer battery, a manganese dioxide lithium secondary battery, a carbon lithium titanate secondary battery, etc. It can be illustrated.

  Moreover, the nominal voltage of a lithium ion battery and a lithium polymer battery is 3.6V-3.7V. The nominal voltage of the manganese dioxide lithium secondary battery is 3.0V. The nominal voltage of the carbon lithium titanate secondary battery is 1.5V. Further, the voltage range between the “end-of-discharge voltage” and the “end-of-charge voltage” in the lithium ion battery is 2.7V to 4.2V. The “end-of-discharge voltage” refers to the lowest value of the discharge voltage that allows safe discharge, and the “end-of-charge voltage” refers to the highest value of the charge voltage that allows safe charge.

  The secondary battery 10 is preferably a lithium ion battery. In this case, since the nominal voltage of the lithium ion battery is in the range of 3.6 V to 3.7 V, it exceeds 1.2 V to 1.4 V, which is the nominal voltage of the air battery or nickel hydride secondary battery. Moreover, although the battery voltage of a lithium ion battery will show the discharge characteristic which falls from about 4.2V to about 2.7V with discharge, since an energy density is higher than an air battery or a nickel-hydrogen secondary battery, The device can be driven for a longer time than when an air battery or a nickel hydride secondary battery is used.

(Application example of power supply / reception device 1: charger 7)
As shown in FIG. 10, the charger 7 that charges the driving device 5 configured as described above includes a base member 6 in which the feeding coil mechanism 3 is built. The base member 6 has a mounting surface 6a on which the driving device 5 is mounted and a side peripheral surface 6b formed on the peripheral edge of the mounting surface 6a. The placement surface 6a is formed in the same circular shape as the magnetic field generation surface 3a of the power feeding coil mechanism 3, and the center portion of the placement surface 6a and the center portion of the magnetic field generation surface 3a are aligned in the vertical direction. . The side peripheral surface 6b is inclined in the outer peripheral direction from the peripheral edge of the mounting surface 6a, and is formed so as to move the driving device 5 in the inner peripheral direction of the mounting surface 6a by sliding.

  According to said structure, when the side peripheral surface 6b in the base member 6 inclines in an outer peripheral direction from a peripheral part rather than the mounting surface 6a, the side peripheral surface of the upper surface side used as the side away from the mounting surface 6a. The size of 6b is larger than the placement surface 6a. Even when the driving device 5 is placed so as to come into contact with the side circumferential surface 6b, the driving device 5 slides on the side circumferential surface 6b in the inner circumferential direction and moves onto the placement surface 6a. As a result, the side peripheral surface 6b and the mounting surface 6a serve as a mounting region, and it is possible to mount the driving device 5 on the mounting surface by performing the operation of mounting the driving device 5 on the mounting region. The mounting operation of the driving device 5 on the mounting surface 6a is facilitated.

  The side peripheral surface 6b is formed such that the resultant force of the maximum static friction force on the driving device 5 by the mounting surface 6a and the maximum static friction force on the driving device 5 by the side peripheral surface 6b is smaller than the weight of the driving device 5. It is preferable that As a result, the driving device 5 can be slid down onto the placement surface 6a by its own weight.

  Moreover, it is preferable that the mounting surface 6a and the side peripheral surface 6b have many unevenness | corrugations so that a contact area with the drive device 5 may become small. In this case, the maximum static friction coefficient of the mounting surface 6a and the side peripheral surface 6b can be easily reduced. Further, the mounting surface 6a and the side peripheral surface 6b have a contact layer formed of a fluorine coat (Teflon (registered trademark)) or a glass coat for improving smoothness to improve the slipperiness with respect to the drive device 5. 6 is preferably laminated on the base material. Furthermore, the mounting surface 6a and the side peripheral surface 6b may be a combination of a laminated structure of contact layers and an uneven surface shape. A combination of a laminated structure and an uneven surface shape may be applied. Further, a contact layer may be formed on one of the placement surface 6a and the side peripheral surface 6b, and an uneven surface shape may be provided on the other of the placement surface 6a and the side peripheral surface 6b.

  Below the placement surface 6 a of the charger 7, the feeding coil mechanism 3 is arranged. An oscillation control circuit 81 that supplies AC power to the power supply coil mechanism 3 is connected to the power supply coil mechanism 3. The oscillation control circuit 81 and the power feeding coil mechanism 3 are integrated as a power feeding module 8 so as to improve handling. A USB terminal 61 is connected to the oscillation control circuit 81. The USB terminal 61 can be connected to a USB cable (not shown) from an external device such as a personal computer provided outside the base member 6, and can supply 5 V DC power to the oscillation control circuit 81 from the external device. . The charger 7 is connected to a household AC power cord instead of the USB terminal 61 so that the DC power converted from the AC power by the rectifier circuit and the transformer can be supplied to the oscillation control circuit 81. May be.

  The power supply module 8 will be described in detail. The power supply module 8 is a power supply device having a function of supplying power. The power supply module 8 includes a magnetic member 4 and a power receiving coil mechanism 2 that receives power by a magnetic field, and is opposed to the power supply module 8. The power supply coil mechanism 3 is provided so that the magnetic field generation region of the magnetic field lines that are curved on the magnetic field generation surface 3a is larger than the magnetic field generation region of the magnetic field lines that advance straight.

  According to the above configuration, the magnetic field generation surface 3 a of the power supply coil mechanism 3 has a coil diameter larger than the coil diameter of the power reception coil mechanism 2, and the magnetic field generation region of the magnetic field lines that are further curved is enlarged with respect to the power reception coil mechanism 2. As a result, even when the power receiving coil mechanism 2 is positioned at an arbitrary position on the magnetic field generation surface 3 a of the power feeding coil mechanism 3, many curved magnetic fluxes from the power feeding coil mechanism 3 are chained to the power receiving coil mechanism 2. It is possible to increase the possibility of crossing.

  The power supply module 8 may not include the magnetic member 4. According to this configuration, the magnetic field generation region of the curved magnetic field lines is further expanded with respect to the power receiving coil mechanism 2, so that many curved magnetic fluxes from the power feeding coil mechanism 3 are linked to the power receiving coil mechanism 2. The possibility can be further increased.

(Space part with small magnetic field)
Next, the “space portion with a small magnetic field” in the drive device 5 will be described in detail.

  As shown in FIG. 1, the driving device 5 is configured to form a “space portion with a small magnetic field” at a desired position. Formation of the space portion at a desired position can be realized by setting power supply conditions such as a positional relationship with the charger 7, a power supply state, and an internal configuration.

  For example, when the driving device 5 supplies power from the power feeding resonator 32 of the charger 7 to the power receiving resonator 22 by a resonance phenomenon, the driving device 5 is placed at a desired position between the power feeding resonator 32 and the power receiving resonator 22. A magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the position may be formed as a “space portion”.

  The method of forming the “space portion” will be described in detail. When electric power is supplied from the power supply resonator 32 of the charger 7 to the power reception resonator 22 of the drive device 5 by a resonance phenomenon, the current flowing through the power supply resonator 32. A method of setting the frequency of the power supplied to the power feeding resonator 32 so that the direction of current and the direction of the current flowing through the power receiving resonator 22 are opposite is illustrated.

  According to the above formation method, when power transmission is performed using a resonance phenomenon, the feeding resonator 32 and the power receiving resonator 22 are arranged close to each other, thereby strengthening the coupling between the power feeding resonator 32 and the power receiving resonator 22. The coupling coefficient representing the height increases. When the transmission characteristic “S21” (a value serving as an index of power transmission efficiency when power is transmitted from the power feeding resonator 32 to the power receiving resonator 22) is measured in a state where the coupling coefficient is high in this way, the measurement waveform is a low frequency. Peaks are separated on the high frequency side. Then, by setting the frequency of the power supplied to the power supply resonator 32 to the frequency near the peak on the high frequency side, the direction of the current flowing through the power supply resonator 32 and the direction of the current flowing through the power reception resonator 22 are reversed. The magnetic field generated on the inner peripheral side of the power feeding resonator 32 and the magnetic field generated on the inner peripheral side of the power receiving resonator 22 cancel each other, so that the power feeding resonator 32 and the power receiving resonator 22 have the inner peripheral side. The influence of the magnetic field is reduced, and a magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the inner peripheral side of the power feeding resonator 32 and the power receiving resonator 22 can be formed as a “space portion”.

  As another method for forming the “space portion”, when power is supplied from the power supply resonator 32 to the power reception resonator 22 by a resonance phenomenon, the direction of the current flowing through the power supply resonator 32 and the power reception resonator 22 are supplied. The method of setting the frequency of the electric power supplied to the electric power feeding resonator 32 so that the direction of the electric current which flows may become the same direction is illustrated.

  According to the above formation method, when power transmission using the resonance phenomenon is performed, the feeding resonator 32 and the power receiving resonator 22 are disposed in proximity to each other, thereby coupling the power feeding resonator 32 and the power receiving resonator 22. The coupling coefficient representing strength increases. When the transmission characteristic is measured in such a state where the coupling coefficient is high, the peak of the measurement waveform is separated into the low frequency side and the high frequency side. Then, by setting the frequency of the power supplied to the power supply resonator 32 to the frequency near the peak on the low frequency side, the direction of the current flowing through the power supply resonator 32 and the direction of the current flowing through the power reception resonator 22 are changed. In the same direction, the magnetic field generated on the outer peripheral side of the power feeding resonator 32 and the magnetic field generated on the outer peripheral side of the power receiving resonator 22 cancel each other, so that a magnetic field is generated on the outer peripheral side of the power feeding resonator 32 and the power receiving resonator 22. Thus, the magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the outer peripheral side of the power feeding resonator 32 and the power receiving resonator 22 can be formed as a “space portion”.

  In addition, the “space portion” is set based on the strength of the magnetic field coupling generated between the power supply resonator 32 and the power reception resonator 22 by changing the adjustment parameters related to the power supply resonator 32 and the power reception resonator 22. May be. For example, the size of the magnetic field space can be expanded by relatively weakening the magnetic field coupling generated between the power feeding resonator 32 and the power receiving resonator 22. On the other hand, the size of the magnetic field space can be reduced by relatively strengthening the magnetic field coupling generated between the power feeding resonator 32 and the power receiving resonator 22. Thereby, the “space portion” that is optimal for the size of the drive device 5 can be formed.

  The placement relationship of the power feeding resonator 32 and the placement relationship of the power receiving resonator 22 are used as adjustment parameters, and the strength of the magnetic field coupling generated between the power feeding resonator 32 and the power receiving resonator 22 by changing the adjustment parameters. The size of the magnetic field space may be changed by changing.

  Further, the “space portion” uses the shapes of the power feeding resonator 32 and the power receiving resonator 22 as adjustment parameters, and changes the shape of these coils to a desired shape, and between the power feeding resonator 32 and the power receiving resonator 22. The shape may be set to a desired shape by changing the strength of magnetic field coupling generated in the periphery. In this case, by making the power feeding resonator 32 and the power receiving resonator 22 into desired shapes, a magnetic field space having a relatively weak magnetic field strength can be formed in a desired shape along the shape of the coil.

  The “space portion” has at least one of a first distance between the power feeding resonator 32 and the power feeding coil 31 and a second distance between the power receiving coil 21 and the power receiving resonator 22 as an adjustment parameter. The size may be set based on this adjustment parameter. For example, by relatively shortening the first distance between the power feeding resonator 32 and the power feeding coil 31 and the second distance between the power receiving coil 21 and the power receiving resonator 22, the magnetic field coupling is relatively It can be weakened to increase the size of the magnetic field space. On the other hand, by relatively increasing the first distance between the power supply resonator 32 and the power supply coil 31 and the second distance between the power reception coil 21 and the power reception resonator 22, the magnetic field coupling is relatively increased. By strengthening, the size of the magnetic field space can be reduced.

  Furthermore, the “space portion” may be formed using the magnetic member 4 or by adding a magnetic member for a magnetic field space. Specifically, a magnetic member is disposed so as to cover at least a part of the surface excluding the facing surfaces of the power receiving resonator 22 and the power feeding resonator 32, and a magnetic field is generated between the power feeding resonator 32 and the power receiving resonator 22. By performing power transmission while changing, a magnetic field space having a magnetic field strength smaller than the magnetic field strength other than the desired position at a desired position may be formed as a “space portion”. For example, the magnetic member may be disposed so as to cover the inner peripheral surface of the power receiving resonator 22. In this case, the magnetic field generated on the inner peripheral side of the power receiving resonator 22 is cut off, and a magnetic field space having a relatively small magnetic field strength is formed as a “space portion” on the inner peripheral side of the power receiving resonator 22. Can do.

  Further, the magnetic member may be disposed so as to cover a surface opposite to the facing surfaces of the power feeding resonator 32 and the power receiving resonator 22. In this case, the magnetic field generated near the surface opposite to the surface opposite to the power receiving resonator 22 is cut off, and the magnetic field strength is relatively small near the surface opposite to the surface facing the power receiving resonator 22. The magnetic field space can be formed as a “space part”.

  In this way, the drive device 5 intends a magnetic field space having a small magnetic field strength as a “space part” at a desired position inside or in the vicinity of the power receiving coil mechanism 2 based on one or more combinations of the above-described space part forming methods. The size and shape of the “space portion” can be set. That is, the drive device 5 can form a desired space portion depending on the installation mode of the power receiving coil mechanism 2.

  In the above detailed description, the present invention has been described mainly with respect to characteristic parts so that the present invention can be more easily understood. However, the present invention is not limited to the embodiments described in the above detailed description, and other implementations are possible. It can also be applied to forms and its scope should be interpreted as widely as possible. The terms and terminology used in the present specification are used to accurately describe the present invention, and are not used to limit the interpretation of the present invention. Moreover, it would be easy for those skilled in the art to infer other configurations, systems, methods, and the like included in the concept of the present invention from the concept of the invention described in this specification. Accordingly, the description of the claims should be regarded as including an equivalent configuration without departing from the technical idea of the present invention. In addition, in order to fully understand the object of the present invention and the effects of the present invention, it is desirable to fully consider the literatures already disclosed.

DESCRIPTION OF SYMBOLS 1 Power supply / reception apparatus 1A Power supply / reception apparatus 2 Power reception coil mechanism 3 Power supply coil mechanism 3a Magnetic field generation surface 4 Magnetic member 5 Driving device 6 base member 6a Mounting surface 6b Side peripheral surface 7 Charger 8 Power supply module 9 Power reception module 10 Secondary battery 21 Power receiving coil 22 Power receiving resonator 31 Power feeding coil 32 Power feeding resonator 51 Housing

Claims (12)

A receiving coil mechanism for receiving power by a magnetic field;
A power supply having a magnetic field generation surface having a coil diameter larger than the coil diameter of the power receiving coil mechanism, and the magnetic field generation region of the curved magnetic force lines on the magnetic field generation surface is larger than the magnetic field generation region of the magnetic force lines moving straight. A coil mechanism;
A magnetic member disposed in the power receiving coil mechanism;
A power supply / reception device comprising:   The power supply / reception device according to claim 1, wherein the magnetic member is disposed only in the power reception coil mechanism among the power reception coil mechanism and the power supply coil mechanism.   The magnetic member of the power receiving coil mechanism is disposed so that the power receiving coil mechanism is positioned at an intermediate portion between one end side and the other end side of the magnetic member. Power supply / reception device. The power receiving coil mechanism includes a power receiving coil and a power receiving resonator,
The power supply coil mechanism includes a power supply coil and a power supply resonator that transmits power by magnetic field resonance between the power reception resonator and the power supply coil mechanism.
The power receiving coil mechanism is
The power receiving / feeding device according to claim 3, wherein the power receiving resonator is disposed in an intermediate portion between one end side and the other end side of the power receiving coil. A drive device having a power receiving coil mechanism for receiving power by a magnetic field;
A battery charger comprising: a base member having a mounting surface on which the driving device can be mounted; and a feeding coil mechanism that has a magnetic field generating surface disposed opposite to the mounting surface and generates the magnetic field. Have
The magnetic field generating surface of the power feeding coil mechanism has a coil diameter larger than the coil diameter of the power receiving coil mechanism,
The drive device is formed so that the power receiving coil mechanism is positioned on a magnetic field generation region of a curved magnetic field line on the magnetic field generation surface under a condition that a part of the drive device is positioned on a peripheral portion of the placement surface. A power supply / reception device. A drive device having a power receiving coil mechanism for receiving power by a magnetic field;
A base member having a mounting surface on which the driving device can be mounted, and a magnetic field generation surface that is disposed opposite to the mounting surface and generates the magnetic field, and generates a magnetic field line that curves on the magnetic field generation surface. A power supply coil mechanism formed so as to expand more than the magnetic field generation region of the magnetic field lines in which the region goes straight,
The magnetic field generation surface of the power feeding coil mechanism has a coil diameter larger than the coil diameter of the power receiving coil mechanism,
The drive device has a magnetic member disposed so that the power receiving coil mechanism is positioned at an intermediate portion between one end side and the other end side, and a part of the drive device is positioned on the peripheral portion of the mounting surface. Thus, the power receiving / feeding device is characterized in that the power receiving coil mechanism is positioned on a magnetic field generating region of a magnetic field line that is curved on the magnetic field generating surface. The base member is
7. The apparatus according to claim 5, further comprising a side peripheral surface that is inclined in an outer peripheral direction from a peripheral portion of the mounting surface and moves the driving device in an inner peripheral direction of the mounting surface by sliding. The power supply / reception device described. The drive device is
8. The power supply / reception device according to claim 5, wherein the power reception device is formed in an outer shape that causes a coil surface of the power reception coil mechanism to face a magnetic field generation surface of the power supply coil mechanism by its own weight.   The power supply / reception device according to claim 5, wherein the driving device is a hearing aid. A power receiving device including a power receiving coil mechanism disposed opposite to a power feeding coil mechanism having a magnetic field generating surface that is larger than a magnetic field generating region of a magnetic force line in which a magnetic field generating line of curved magnetic force lines goes straight.
The power receiving coil mechanism has a smaller coil diameter than the magnetic field generation surface of the power feeding coil mechanism,
A power receiving device comprising a magnetic member disposed only in the power receiving coil mechanism among the power feeding coil mechanism and the power receiving coil mechanism. A power receiving coil mechanism that has a magnetic member and receives power by a magnetic field is a power feeding device that is disposed oppositely,
A power supply having a magnetic field generation surface having a coil diameter larger than the coil diameter of the power receiving coil mechanism, and the magnetic field generation region of the curved magnetic force lines on the magnetic field generation surface is larger than the magnetic field generation region of the magnetic force lines moving straight. A power supply device comprising a coil mechanism.   The power feeding device according to claim 11, wherein the power feeding device does not include a magnetic member.

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