JP2022122646A - Wireless power feeding system - Google Patents

Abstract

To provide a wireless power feeding system capable of securing the degree of freedom of movement of a transmitter and a receiver while reducing the misalignment of the transmitter and the receiver to each other than the conventional technology.SOLUTION: A wireless power feeding system 10 includes a power transmitter device 20 having a coil 22 for transmitting power from an AC power supply 40 and a power receiving device 30 including a coil 33 for wirelessly receiving power from the coil 22 by means of an electromagnetic induction method. The power receiving device 30 includes a mounting portion 32 for mounting the power transmitter device 20.SELECTED DRAWING: Figure 3

Description

The present invention relates to a wireless power supply system that wirelessly supplies power to a power receiving device using an electromagnetic induction method.

As an example of a wireless power supply system that wirelessly supplies power to a power receiving device, for example, Patent Document 1 discloses a wireless power transmission system that includes a power transmitting device and a power receiving device.

In the wireless power transmission system disclosed in Patent Literature 1, the power transmission device has an L-shaped housing when viewed from the side. The housing of the power transmission device has a mounting surface and a backrest surface extending substantially perpendicularly upward to the mounting surface. The power receiving device is mounted on the power transmitting device such that the bottom surface of the power receiving device faces the mounting surface and the back surface of the power receiving device faces the backrest surface. That is, the power receiving device is attached to the power transmitting device. An electrode is provided on each of the backrest surface of the power transmitting device and the back surface of the power receiving device. With the power receiving device attached to the power transmitting device, power is wirelessly transmitted from the electrodes of the power transmitting device to the electrodes of the power receiving device.

The wireless power transmission system disclosed in Patent Literature 1 wirelessly transmits power using an electric field coupling method. When this wireless power transmission system wirelessly transmits power by an electromagnetic induction method, coils are provided instead of the electrodes described above.

Japanese Patent No. 5500269

In the wireless power transmission system disclosed in Patent Literature 1, the power receiving device is only placed on the power transmitting device and is not fixed. Therefore, the power receiving device may be displaced with respect to the power transmitting device. When one of the power transmitting device and the power receiving device is displaced with respect to the other, one of the opposing coils is displaced with respect to the other. As a result, the efficiency of power supply to the power receiving device may decrease.

As a means for reducing the possibility of the above-described positional deviation, it is conceivable to fix the power transmission device on the support surface of the control panel or the like. However, when the power transmission device is fixedly arranged on a support surface or the like, the freedom of movement of the power transmission device is lost. In addition, the position of the power receiving device during charging is limited to the position where the power transmitting device is fixed, and the power receiving device cannot be moved while power is being supplied. In other words, the degree of freedom of movement of the power receiving device is also lost.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems, and to secure the degree of freedom of movement of the power transmission device and the power reception device while reducing the positional deviation of the power transmission device and the power reception device compared to the conventional technology. To provide a wireless power feeding system capable of

In order to achieve the above object, the present invention is configured as follows.
A wireless power supply system according to one aspect of the present invention includes:
a power transmission device having a power transmission coil for transmitting power from a power source;
a power receiving device including a power receiving coil that wirelessly receives power from the power transmitting coil by an electromagnetic induction method;
The power receiving device includes a mounting portion for mounting the power transmitting device.

ADVANTAGE OF THE INVENTION According to this invention, the freedom degree of a movement of a power transmission apparatus and a power receiving apparatus can be ensured, reducing a positional deviation of a power transmission apparatus and a power receiving apparatus compared with a prior art.

1 is an external perspective view of a wireless power feeding system according to a first embodiment of the present invention; FIG. FIG. 2 is an external perspective view of a control panel on which a plurality of power receiving devices are mounted; 1 is an external perspective view of a wireless power feeding system according to a first embodiment of the present invention; FIG. 1 is a block diagram of a wireless power feeding system according to a first embodiment of the present invention; FIG. FIG. 2 is an external perspective view of a wireless power feeding system according to a second embodiment of the present invention; The block diagram of the wireless electric power feeding system which concerns on 2nd Embodiment of this invention. The external perspective view of the wireless electric power feeding system which concerns on 3rd Embodiment of this invention. Sectional drawing of the wireless electric power feeding system which concerns on 4th Embodiment of this invention.

A wireless power supply system according to one aspect of the present invention includes:
a power transmission device having a power transmission coil for transmitting power from a power source;
a power receiving device including a power receiving coil that wirelessly receives power from the power transmitting coil by an electromagnetic induction method;
The power receiving device includes a mounting portion for mounting the power transmitting device.

According to this configuration, the power transmitting device is attached to the power receiving device. Therefore, it is possible to reduce the positional deviation of the power transmitting coil with respect to the power receiving coil as compared with the conventional technology.

According to this configuration, the power transmission device is attached to the power reception device. Therefore, unlike the prior art in which the power receiving device is attached to the power transmitting device, the position of the power transmitting device does not limit the freedom of movement of the power receiving device. Further, according to this configuration, the power receiving device can be moved integrally with the power transmitting device while the power transmitting device is attached to the power receiving device. In other words, it is possible to secure the degree of freedom of movement of the power transmitting device and the power receiving device during power feeding.

In the wireless power supply system, the power transmission coil and the power reception coil may face each other when the power transmission device is attached to the attachment portion. According to this configuration, power is supplied while the power transmitting coil and the power receiving coil face each other. Therefore, the power supply efficiency can be improved as compared with the configuration in which the power transmission coil and the power reception coil are not opposed to each other.

In the wireless power feeding system, the power receiving device may include a lock mechanism that locks the power transmitting device in a state of being attached to the attachment portion. According to this configuration, the lock mechanism can prevent the power transmitting device from unintentionally slipping out of the power receiving device.

In the wireless power feeding system, the power transmitting device may include a first wireless communication unit that wirelessly communicates using a control signal, and the power receiving device wirelessly communicates with the first wireless communication unit using the control signal. A second wireless communication unit for communication may be provided. According to this configuration, the power transmission device and the power reception device can transmit and receive control signals between the power transmission device and the power reception device, in addition to power supply from the power transmission coil to the power reception coil.

In the wireless power supply system, the power transmission device may further include a third wireless communication unit that wirelessly communicates with the second wireless communication unit using a control signal in a wireless communication scheme different from that of the first wireless communication unit. Preferably, the first wireless communication unit and the third wireless communication unit may be selectively attached to the attachment unit. According to this configuration, it is possible to mount the power transmitting device corresponding to various wireless communication methods to the power receiving device.

In the wireless power supply system, the first wireless communication unit may be arranged inside the power transmission coil. According to this configuration, it is not necessary to provide a space for arranging the first wireless communication unit outside the power transmission coil in the power transmission device. Therefore, it is possible to suppress an increase in the size of the power transmission device due to the provision of the first wireless communication unit.

In the wireless power supply system, the second wireless communication unit may be arranged inside the power receiving coil. According to this configuration, it is not necessary to provide a space for arranging the second wireless communication unit outside the power receiving coil in the power receiving device. Therefore, it is possible to suppress an increase in the size of the power receiving device due to the provision of the second wireless communication unit.

A wireless power supply system according to an aspect of the present invention may further include a control panel that accommodates the plurality of power receiving devices. According to this configuration, power can be supplied to the plurality of power receiving devices by simply attaching the power transmitting device to each of the plurality of power receiving devices, without moving the plurality of power receiving devices supported by the control panel.

<First embodiment>
FIG. 1 is an external perspective view of a wireless power feeding system according to a first embodiment of the present invention. FIG. 2 is an external perspective view of a control panel on which a plurality of power receiving devices are mounted. The wireless power supply system 10 wirelessly supplies power from the power transmission device 20 to the power reception device 30 by electromagnetic induction.

As shown in FIGS. 1 and 2, the wireless power feeding system 10 includes a power transmitting device 20, a power receiving device 30, and a control panel 100. FIG.

The power transmission device 20 transmits power to the power reception device 30 . As shown in FIG. 1 , the power transmission device 20 includes a substrate 21 and coils 22 . Coil 22 is an example of a power transmission coil.

The substrate 21 is an insulator. In the first embodiment, the substrate 21 is a multilayer substrate made of glass epoxy. The material of the substrate 21 is not limited to glass epoxy, and may be, for example, resin other than glass epoxy such as paper phenol, or ceramic such as alumina. The substrate 21 is not limited to a multilayer substrate, and may be a single-sided substrate or a double-sided substrate.

Conductor wiring can be formed on at least one of the front surface of the substrate 21 , the rear surface of the substrate 21 , and the boundaries between the layers of the substrate 21 . The conductor is for example copper. Also, vias may be formed in at least one layer of the substrate 21 .

In the first embodiment, the coil 22 includes a conductor formed on the surface of the substrate 21, a conductor formed at one of the boundaries of each layer of the substrate 21, and vias electrically connecting the conductors. formed by 1 and FIGS. 3, 5, and 7, which will be described later, the conductor formed on the surface of the substrate 21 of the coil 22 is schematically illustrated as a double ring. The coil 22 may have a spiral shape or a spiral shape.

Coil 22 is electrically connected to AC power supply 40 . AC power supply 40 is an example of a power supply. One end of the coil 22 is electrically connected to the AC power supply 40 via the electric wire 61 . The other end of coil 22 is electrically connected to AC power supply 40 via electric wire 62 . As a result, power is supplied from the AC power supply 40 to the coil 22 . A DC power supply may be provided instead of the AC power supply 40, and the DC power supply and the coil 22 may be electrically connected via a D/A converter.

The power receiving device 30 is supplied with power from the coil 22 of the power transmitting device 20 . The power receiving device 30 is, for example, a temperature control device, a sensor unit, a communication unit, or the like.

As shown in FIG. 2 , the power receiving device 30 is mounted on the control panel 100 . In FIG. 2 , three power receiving devices 30 are housed in a drawer 110 provided on the control panel 100 .

The number of power receiving devices 30 housed in the drawer 110 is not limited to three, and may be one or five, for example. When a plurality of power receiving devices 30 are accommodated in the drawer 110, the type of each power receiving device 30 may be the same or different. For example, all of the three power receiving devices 30 shown in FIG. 2 may be temperature control units, or the three power receiving devices 30 may each be a temperature control device, a sensor unit, and a communication unit.

Although the control panel 100 has one drawer 110 in FIG. 2, the control panel 100 may have multiple drawers 110 . In this case, each drawer 110 may house at least one power receiving device 30 . The control panel 100 is not limited to the configuration shown in FIG. For example, the control panel 100 may have a plurality of stages of DIN rails extending in the width direction in the vertical direction. In this case, at least one power receiving device 30 is supported on each DIN rail, and each DIN rail supporting the power receiving device 30 is accommodated in the control panel 100 .

In the first embodiment, the wireless power supply system 10 includes a control panel 100 , a plurality of power receiving devices 30 accommodated in the control panel 100 , and a power transmitting device 20 that supplies power to the plurality of power receiving devices 30 . In this case, the wireless power supply system 10 may include the same number of power transmitting devices 20 as the power receiving devices 30 corresponding to each of the plurality of power receiving devices 30, or may include a smaller number of power transmitting devices than the plurality of power receiving devices 30. 20 may be provided. If the wireless power feeding system 10 includes the same number of power transmitting devices 20 as the power receiving devices 30, power can be supplied to the plurality of power receiving devices 30 all at once. When the wireless power feeding system 10 includes the power transmitting devices 20 that are fewer in number than the power receiving devices 30, power is fed to the plurality of power receiving devices 30 in a predetermined order.

In the first embodiment, the wireless power feeding system 10 includes a control panel 100 , a power receiving device 30 and a power transmitting device 20 . However, the wireless power supply system 10 does not have to include the control panel 100 . In this case, the wireless power feeding system 10 includes, for example, one power transmitting device 20 and one power receiving device 30, as shown in FIG.

FIG. 3 is an external perspective view of the wireless power feeding system according to the first embodiment of the present invention. FIG. 4 is a block diagram of the wireless power feeding system according to the first embodiment of the present invention.

As shown in FIGS. 3 and 4 , the power receiving device 30 includes a housing 31 , a mounting section 32 , a coil 33 and a load 34 . Coil 33 is an example of a power receiving coil.

The housing 31 is made of resin, metal, or the like. A mounting portion 32 is formed inside the housing 31 . A coil 33 and a load 34 are arranged inside the housing 31 . In the first embodiment, as shown in FIG. 3, the housing 31 has a cubic shape. The housing 31 may have a shape other than a cube.

In the first embodiment, the mounting portion 32 is a recess formed from the outer surface of the housing 31 to the interior of the housing 31 . The mounting portion 32 communicates with the outside of the power receiving device 30 via an opening 32</b>A formed on the outer surface of the housing 31 . The power transmission device 20 is inserted into the mounting portion 32 through the opening 32A (see the arrow in FIG. 3). As a result, the power transmission device 20 is attached to the attachment portion 32 . The power transmission device 20 attached to the attachment portion 32 is extracted from the attachment portion 32 through the opening 32A.

In the first embodiment, the coil 33 is arranged close to the mounting portion 32 .

The coil 33 is configured similarly to the coil 22 of the power transmission device 20 in the first embodiment. That is, the coil 33 includes a conductor formed on the surface of a substrate (not shown) arranged inside the housing 31, a conductor formed on one of the boundaries of each layer of the substrate, and each of the conductors. are formed by vias that electrically connect the Note that the coil 33 is schematically illustrated as a double ring in FIG. 3 and FIG. 5 described later. The coil 33 may have a spiral shape or a spiral shape. One end and the other end of the coil 33 are electrically connected to the load 34 .

In the first embodiment, the coil 33 and the coil 22 of the power transmission device 20 face each other when the power transmission device 20 is mounted on the mounting portion 32 . Specifically, the winding axis of the coil 33 and the winding axis of the coil 22 are coaxial.

When the AC power supply 40 applies an AC voltage to the coil 22 and an AC current flows through the coil 22 while the power transmission device 20 is attached to the attachment portion 32 , the coil 22 is energized according to the fluctuation of the current flowing through the coil 22 . A magnetic flux is generated to penetrate. An induced electromotive force is generated in the coil 33 so as to cancel the magnetic flux generated in the coil 22 . That is, the coil 22 transmits power from the AC power supply 40, and the coil 33 wirelessly receives power from the coil 22 by electromagnetic induction.

The arrangement position of the coil 33 is not limited to the position described above, provided that it is a position where electric power can be wirelessly supplied from the coil 22 by an electromagnetic induction method. For example, the winding axis of the coil 33 and the winding axis of the coil 22 may be shifted from each other or may cross each other. Also, for example, the coil 33 does not have to face the coil 22 .

The load 34 is a device that converts flowing current into heat and the like, and is, for example, a circuit having various electronic components such as resistors, capacitors, inductors, and transistors. In the first embodiment, the load 34 is a circuit for operating the power receiving device 30 . For example, various electronic components are mounted on a substrate on which the coil 33 is formed, and the load 34 is configured by electrically connecting each electronic component to the substrate by wiring formed of a conductor. A circuit forming the load 34 is electrically connected to one end and the other end of the coil 33, for example, via wiring formed on the substrate. Thereby, the electric power supplied from the coil 22 to the coil 33 is supplied to the load 34 . As a result, the power receiving device 30 operates.

In FIG. 4, wired power transfer is indicated by a solid line, and wireless power transfer is indicated by a dashed line. In the first embodiment, as shown in FIG. 4 , power is supplied from the AC power supply 40 to the coil 22 of the power transmission device 20 by wire, and power is wirelessly supplied from the coil 22 to the coil 33 of the power reception device 30 . power is supplied to the load 34 of the power receiving device 30 by wire.

According to the first embodiment, the power transmission device 20 is attached to the power reception device 30 . Therefore, positional deviation of the coil 22 with respect to the coil 33 can be reduced as compared with the prior art.

According to the first embodiment, the power transmission device 20 is attached to the power reception device 30 . Therefore, unlike the conventional technology in which the power receiving device 30 is attached to the power transmitting device 20 , the position of the power transmitting device 20 does not restrict the freedom of movement of the power receiving device 30 . Further, according to the first embodiment, the power receiving device 30 can be moved integrally with the power transmitting device 20 while the power transmitting device 20 is attached to the power receiving device 30 . In other words, the degree of freedom of movement of the power transmitting device 20 and the power receiving device 30 can be secured during power feeding.

If the space between the facing coils is located outside the wireless power supply system as in the conventional technology, the power transmission device 20 may Power supply to the power receiving device 30 may be affected. According to the first embodiment, power is supplied from the coil 22 to the coil 33 while the power transmitting device 20 is positioned inside the power receiving device 30 . Therefore, it is possible to reduce the possibility that the coil 22 and the coil 33 being supplied with power will come into contact with the user's hand or the like from the outside as compared with the prior art. As a result, the possibility that the power supply from the coil 22 to the coil 33 is influenced from the outside can be made lower than in the prior art.

According to the first embodiment, power is supplied while the coil 22 and the coil 33 face each other. Therefore, the power supply efficiency can be improved as compared with the configuration in which the coil 22 and the coil 33 are not opposed to each other.

According to the first embodiment, power can be supplied to a plurality of power receiving devices 30 only by attaching the power transmitting device 20 to each power receiving device 30 without moving the plurality of power receiving devices 30 supported by the control panel 100. can.

In the first embodiment, the coil 22 is formed by conductors and vias formed on the substrate 21, but is not limited to this. For example, the coil 22 may be an electronic component such as a chip component mounted on the substrate 21 . Like the coil 22 , the coil 33 may be an electronic component mounted on a substrate arranged inside the power receiving device 30 .

In the first embodiment, the power transmission device 20 includes the substrate 21 and the coil 22 formed on the substrate 21, but the configuration of the power transmission device 20 is not limited to this. For example, the power transmission device 20 may be composed of a housing and a coil built into the housing.

In the first embodiment, the mounting portion 32 is a recess formed in the housing 31 of the power receiving device 30, but is not limited to this. For example, the power receiving device 30 may include two housings that are detachable from each other, and the power transmitting device 20 may be mounted inside the power receiving device 30 by sandwiching the power transmitting device 20 between the two housings. In this case, the surface portions of the two housings sandwiching the power transmission device 20 correspond to the mounting portion.

<Second embodiment>
FIG. 5 is an external perspective view of a wireless power feeding system according to a second embodiment of the present invention. FIG. 6 is a block diagram of a wireless power feeding system according to the second embodiment of the present invention. The wireless power supply system 10A according to the second embodiment differs from the wireless power supply system 10 according to the first embodiment in that the wireless power supply system 10A according to the second embodiment includes wireless communication units 23 and 35. be. Differences from the first embodiment will be described below. Points in common with the wireless power supply system 10 of the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted in principle, and will be described as necessary. This also applies to each embodiment described later.

As shown in FIGS. 5 and 6 , the power transmission device 20A has a wireless communication section 23 . The wireless communication unit 23 is an example of a first wireless communication unit. Other configurations of the power transmission device 20</b>A are the same as those of the power transmission device 20 .

The wireless communication unit 23 transmits and receives control signals using a wireless communication method that complies with wireless communication standards such as Bluetooth (registered trademark) and RFID (Radio Frequency Identifier). That is, the wireless communication unit 23 wirelessly communicates using the control signal.

In the second embodiment, the wireless communication unit 23 is an IC (Integrated Circuit), and is mounted inside the coil 22 on the substrate 21 as shown in FIG. The wireless communication section 23 is electrically connected to the external device 50 via the electric wire 63 . That is, the wireless communication unit 23 communicates with the external device 50 by wire. Note that the wireless communication unit 23 may wirelessly communicate with the external device 50 .

The external device 50, for example, controls the power receiving device 30A, displays input information from the power receiving device 30A, and performs predetermined calculations on information input from the power receiving device 30A. Specifically, the external device 50 is a personal computer, a tablet terminal, a smart phone, or the like.

As shown in FIGS. 5 and 6 , the power receiving device 30A has a wireless communication section 35 . The wireless communication unit 35 is an example of a second wireless communication unit. Other configurations of the power receiving device 30</b>A are the same as those of the power receiving device 30 .

The wireless communication unit 35 transmits and receives control signals to and from the wireless communication unit 23 . That is, the wireless communication unit 35 wirelessly communicates with the wireless communication unit 23 using the control signal. Transmission and reception of the control signal by the wireless communication unit 35 is performed by a wireless communication system conforming to a wireless communication standard such as Bluetooth (registered trademark) or RFID (Radio Frequency Identifier), like the wireless communication unit 23 .

The wireless communication unit 35 is arranged inside the housing 31 of the power receiving device 30A, that is, inside the power receiving device 30A. In the second embodiment, the wireless communication section 35 is an IC like the wireless communication section 23, and is mounted on the substrate on which the coil 33 is mounted. The wireless communication section 35 is mounted inside the coil 33 . Accordingly, in a state in which the power transmission device 20A is attached to the attachment portion 32 of the power reception device 30A, the wireless communication portion 35 is close to and faces the wireless communication portion 23 . The wireless communication unit 35 is electrically connected to the load 34 via wiring formed on the substrate, for example.

In FIG. 6, similarly to FIG. 4, wired power transmission is indicated by a solid line, and wireless power transmission is indicated by a broken line. In the second embodiment, as shown in FIG. 6, the external device 50 and the wireless communication unit 23 transmit and receive control signals to and from each other by wire. The wireless communication units 23 and 35 wirelessly transmit and receive control signals to and from each other. The wireless communication unit 35 and the load 34 transmit and receive control signals to and from each other by wire.

According to the second embodiment, the power transmitting device 20A and the power receiving device 30A can transmit and receive control signals between the power transmitting device 20A and the power receiving device 30 in addition to power feeding from the coil 22 to the coil 33 .

According to the second embodiment, the wireless communication section 23 is arranged inside the coil 22 . Therefore, it is not necessary to provide a space for arranging the wireless communication unit 23 outside the coil 22 in the power transmission device 20A. Therefore, it is possible to suppress an increase in the size of the power transmission device 20A due to the provision of the wireless communication unit 23 .

According to the second embodiment, the wireless communication section 35 is arranged inside the coil 33 . Therefore, it is not necessary to provide a space for arranging the wireless communication unit 35 outside the coil 33 in the power receiving device 30A. Therefore, it is possible to suppress an increase in the size of the power receiving device 30A due to the provision of the wireless communication unit 35 .

In the second embodiment, the wireless communication section 23 is mounted inside the coil 22 on the substrate 21 . However, the position of the wireless communication unit 23 is not limited to inside the coil 22 . For example, the wireless communication unit 23 may be mounted outside the coil 22 on the substrate 21, or may be mounted on the back surface of the substrate 21 where the coil 22 is not mounted. Similarly, the position of the wireless communication unit 35 is not limited to the inner side of the coil 33 on the board on which the coil 33 is mounted.

In the second embodiment, the wireless communication section 23 is an IC mounted on the board 21 . However, the wireless communication unit 23 is not limited to an IC, and may be a component arranged separately from the substrate 21, for example. In this case, the power transmission device 20 includes, for example, a housing that accommodates the coil 22 and the wireless communication section 23 . Similarly to the wireless communication unit 23, the wireless communication unit 35 is not limited to an IC, and may be a component arranged inside the housing 31 separately from the substrate on which the coil 33 is mounted, for example.

In the second embodiment, as shown in FIG. 5, the external device 50 and the AC power supply 40 are provided separately, but the present invention is not limited to this. For example, AC power supply 40 may be built in external device 50 .

<Third Embodiment>
FIG. 7 is an external perspective view of a wireless power feeding system according to a third embodiment of the present invention. The wireless power supply system 10B according to the third embodiment is different from the wireless power supply system 10A according to the second embodiment in that, in the wireless power supply system 10B according to the third embodiment, the plurality of types of power transmission devices 20B and 20C are connected to the power reception device 30A. It is to be selectively attached to the Differences from the second embodiment will be described below.

As shown in FIG. 7, in a wireless power supply system 10B according to the third embodiment, a plurality of types of power transmission devices 20B and 20C are selectively attached to a power reception device 30A.

The power transmission device 20B includes a substrate 21, a coil 22, and a wireless communication section 23A. 20 C of power transmission apparatuses are provided with the board|substrate 21, the coil 22, and the radio|wireless communication part 23B. In other words, the power transmission devices 20B and 20C have a common substrate 21 and coil 22, but different wireless communication units. The wireless communication unit 23A is an example of a second wireless communication unit. The radio communication section 23B is an example of a third radio communication section.

The coil 22 of the power transmission device 20B is electrically connected to the AC power supply 40A as in the second embodiment. The coil 22 of the power transmission device 20C is electrically connected to the AC power supply 40B as in the second embodiment. AC power supplies 40A and 40B have the same configuration as AC power supply 40 .

23 A of radio|wireless communication parts of the power transmission apparatus 20B are electrically connected with 50 A of external apparatuses similarly to 2nd Embodiment. A wireless communication unit 23B of the power transmission device 20C is electrically connected to an external device 50B, as in the second embodiment. External devices 50A and 50B have the same configuration as external device 50 .

The wireless communication unit 23B wirelessly communicates with the wireless communication unit 35 using a control signal in a wireless communication method different from that of the wireless communication unit 23A.

For example, while the wireless communication unit 23A supports version 5.0 of the Bluetooth (registered trademark) wireless communication standard, the wireless communication unit 23B supports version 4.0 of the Bluetooth (registered trademark) wireless communication standard. Only up to . In this case, the wireless communication unit 23A receives and transmits control signals at a higher speed than the wireless communication unit 23B, and receives and transmits control signals over a wide range from the wireless communication unit 23B.

Further, for example, the wireless communication unit 23A transmits and receives control signals by a wireless communication method conforming to the wireless communication standard of Bluetooth (registered trademark), whereas the wireless communication unit 23B transmits and receives control signals by WIFI (registered trademark). send and receive

According to the third embodiment, the power transmitting devices 20B and 20C corresponding to various wireless communication methods can be attached to the power receiving device 30A.

In the third embodiment, the positions of the wireless communication units 23A and 23B are not limited to the inside of the coil 22, and the position of the wireless communication unit 35 is not limited to the inside of the coil 33, as in the second embodiment.

In the third embodiment, as in the second embodiment, the wireless communication units 23A, 23B, and 35 are not limited to ICs.

In the third embodiment, as shown in FIG. 7, external devices 50A and 50B are provided separately from AC power supplies 40A and 40B, respectively, but this is not the only option. For example, the AC power supply 40A may be built in the external device 50A.

In the third embodiment, power transmission devices 20B and 20C are electrically connected to separate AC power sources 40A and 40B and external devices 50A and 50B, respectively. However, the power transmission devices 20B and 20C may be electrically connected to the same AC power supply, or may be electrically connected to the same external device.

<Fourth Embodiment>
FIG. 8 is a cross-sectional view of a wireless power supply system according to a fourth embodiment of the invention. The wireless power supply system 10C according to the fourth embodiment differs from the wireless power supply system 10 according to the first embodiment in that the power receiving device 30B of the wireless power supply system 10C according to the fourth embodiment has a lock mechanism. The configuration of the lock mechanism, which is different from the first embodiment, will be described below.

The power receiving device 30B has a lock mechanism. Other configurations of the power receiving device 30B are the same as those of the power receiving device 30 . The lock mechanism locks the power transmission device 20 in a state in which it is attached to the attachment portion 32 . In the fourth embodiment, the lock mechanism includes a rotating member 36, coil springs 37 and 38, and a support member 39, as shown in FIG.

A pair of recesses 31A are formed on the outer surface of the housing 31 . The pair of concave portions 31A sandwich the mounting portion 32 from both sides and are continuous with the mounting portion 32 .

The rotating member 36 and the coil spring 37 are accommodated in each of the pair of recesses 31A.

The rotating member 36 is supported by the housing 31 so as to be rotatable around a rotating shaft 36A. The rotating member 36 is rotated between the locking posture indicated by the solid line in FIG. 8 and the releasing posture indicated by the broken line in FIG. The rotating member 36 has a protrusion 36B at its tip. The convex portion 36B protrudes toward the mounting portion 32 . The convex portion 36B has an inclined surface 36C. The inclined surface 36C faces the outside of the housing 31 .

One end of the coil spring 37 is connected to the rotating member 36 . The other end of the coil spring 37 is connected to the surface 31Aa forming the recess 31A in the housing 31 . A coil spring 37 urges the rotating member 36 to the locking posture.

The support member 39 is arranged in the inner part of the mounting portion 32 . The coil spring 38 is arranged between the support member 39 and the inner surface 32B of the mounting portion 32 . One end of the coil spring 38 is connected to the support member 39 . The other end of the coil spring 38 is connected to the inner surface 32B of the mounting portion 32 . A coil spring 38 biases the support member 39 toward the opening 32A.

The operation of mounting the power transmission device 20 on the mounting portion 32 will be described below. The power transmission device 20 is inserted into the mounting portion 32 from above in FIG. 8 through the opening 32A. At this time, the power transmission device 20 contacts and pushes the inclined surface 36C of the rotating member 36 from above. As a result, the rotating member 36 rotates from the locking posture to the releasing posture against the biasing force of the coil spring 37 . As a result, the power transmission device 20 is inserted into the mounting portion 32 . When the power transmission device 20 passes through the rotating member 36, the rotating member 36 is biased by the coil spring 37 to rotate from the release posture to the lock posture. As a result, the power transmission device 20 is held in a state in which it is attached to the attachment portion 32 (see FIG. 8).

Also, the power transmission device 20 inserted into the mounting portion 32 contacts and presses the support member 39 . This causes the coil spring 38 to contract. As a result, the support member 39 is biased by the coil spring 38 and pushes the power transmission device 20 out of the mounting portion 32 . However, as described above, since the power transmitting device 20 is locked by the rotating member 36 , that is, it is held in a state of being attached to the mounting portion 32 by the rotating member 36 , it cannot come out of the mounting portion 32 . no.

The operation of removing the power transmitting device 20 from the mounting portion 32 will be described below. In the state shown in FIG. 8, the user manually rotates the rotating member 36 from the locking posture to the releasing posture. Then, the power transmission device 20 is pushed against the support member 39 by the biasing force of the coil spring 38 . As a result, part of the power transmission device 20 protrudes from the mounting portion 32 , and the power transmission device 20 can be easily pulled out from the mounting portion 32 .

The configuration of the lock mechanism is not limited to the configuration shown in FIG. 8 as described above, and various known configurations can be employed.

According to the fourth embodiment, the locking mechanism can prevent the power transmitting device 20 from unintentionally slipping out of the power receiving device 30B.

By appropriately combining any of the various embodiments described above, the respective effects can be obtained.

Although the invention has been fully described in connection with preferred embodiments and with appropriate reference to the drawings, various variations and modifications will become apparent to those skilled in the art. Such variations and modifications are to be included therein insofar as they do not depart from the scope of the invention as set forth in the appended claims.

10 wireless power supply system 20 power transmission device 22 coil (power transmission coil)
23 wireless communication unit (first wireless communication unit)
23A wireless communication unit (first wireless communication unit)
23B wireless communication unit (third wireless communication unit)
30 Power receiving device 32 Mounting part 33 Coil (power receiving coil)
35 wireless communication unit (second wireless communication unit)
36 Rotating member (locking mechanism)
37 Coil spring (locking mechanism)
38 Coil spring (locking mechanism)
39 support member (locking mechanism)
40 AC power supply (power supply)
100 control panel

Claims (8)

a power transmission device having a power transmission coil for transmitting power from a power source;
a power receiving device including a power receiving coil that wirelessly receives power from the power transmitting coil by an electromagnetic induction method;
The wireless power feeding system, wherein the power receiving device includes a mounting portion for mounting the power transmitting device. The wireless power feeding system according to claim 1, wherein the power transmitting coil and the power receiving coil face each other when the power transmitting device is mounted on the mounting portion. 3. The wireless power supply system according to claim 1, wherein the power receiving device includes a locking mechanism that locks the power transmitting device in a state of being attached to the attachment portion. The power transmission device includes a first wireless communication unit that wirelessly communicates using a control signal,
The wireless power supply system according to any one of claims 1 to 3, wherein the power receiving device includes a second wireless communication unit that wirelessly communicates with the first wireless communication unit using the control signal. The power transmission device further includes a third wireless communication unit that wirelessly communicates with the second wireless communication unit using a control signal in a wireless communication method different from that of the first wireless communication unit,
5. The wireless power supply system according to claim 4, wherein the first wireless communication unit and the third wireless communication unit are selectively attached to the attachment unit. The wireless power supply system according to claim 4 or 5, wherein the first wireless communication unit is arranged inside the power transmission coil. The wireless power supply system according to any one of claims 4 to 6, wherein the second wireless communication unit is arranged inside the power receiving coil. The wireless power supply system according to any one of claims 1 to 7, further comprising a control panel that accommodates the plurality of power receiving devices.

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