Wireless power supply device

Abstract

To provide a wireless power supply device capable of further improving power transmission efficiency.SOLUTION: A wireless power supply device includes a power transmission coil provided in an outer frame installed around an opening portion and a power reception coil provided in an inner frame that is movable in a first direction in which the opening portion is in a closed state and in a second direction in which the opening portion is in an open state to perform transmission of power from the power transmission coil to the power reception coil. Each of the power transmission coil and the power reception coil has an elongated cylindrical body penetrating in an axial direction and a conductive wire wound around an outer periphery of the cylindrical body, is provided so as to extend in the first direction and the second direction, and is configured such that one of the power transmission coil and the power reception coil is inserted into the other when the inner frame moves in the first direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a wireless power supply device. [Background technology]

[0002] Conventionally, a wireless power supply device has been known that has a power transmitting coil provided on the outer frame of a sash and a power receiving coil provided on a glass window that slides left and right along a rail on the outer frame (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-163840 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the device in Patent Document 1 uses a power transmitting coil and a power receiving coil that are wound in a plane parallel to the surface of the glass window, leaving room for improvement in terms of power transmission efficiency.

[0005] An object of one aspect of the present disclosure is to provide a wireless power supply device that can further improve power transmission efficiency. [Means for solving the problem]

[0006] A wireless power supply device according to one embodiment of the present disclosure comprises a transmitting coil provided in an outer frame arranged around an opening portion, and a receiving coil provided in an inner frame that is movable in a first direction in which the opening portion is closed and in a second direction in which the opening portion is open, and transmits power wirelessly from the transmitting coil to the receiving coil, wherein the transmitting coil and the receiving coil each have a long cylindrical body that penetrates in the axial direction and a conductive wire wound around the outer periphery of the cylindrical body, and are arranged to extend along the first direction and the second direction, and are configured such that when the inner frame is moved in the first direction, one of the transmitting coil and the receiving coil is inserted inside the other. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to further improve the power transmission efficiency. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view schematically illustrating a sash according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is a perspective view illustrating a non-inserted state of a wireless power feeder according to an embodiment of the present disclosure. [Figure 3] FIG. 1 is a perspective view illustrating a partially inserted state of a wireless power feeder according to an embodiment of the present disclosure. [Figure 4] FIG. 1 is a perspective view showing a fully inserted state of a wireless power feeder according to an embodiment of the present disclosure. [Figure 5] FIG. 1 is a perspective view illustrating a state in which a wireless power supply device is not inserted into a sash according to an embodiment of the present disclosure. [Figure 6] FIG. 1 is a perspective view illustrating a state in which a wireless power supply device is partially inserted into a sash according to an embodiment of the present disclosure. [Figure 7] FIG. 1 is a perspective view illustrating a state in which a wireless power supply device is fully inserted into a sash according to an embodiment of the present disclosure. [Figure 8] FIG. 10 is a perspective view showing a state in which a wireless power supply device is not inserted into a sash according to a first modification of the present disclosure. [Figure 9]FIG. 10 is a front view schematically showing a housed state of a mechanical movement mechanism according to a second modification of the present disclosure. [Figure 10] FIG. 10 is a front view schematically illustrating a protruding state of a mechanical movement mechanism according to a second modification of the present disclosure. [Figure 11] FIG. 10 is a diagram schematically illustrating a housed state of an electric movement mechanism according to a third modification of the present disclosure. [Figure 12] FIG. 10 is a diagram schematically illustrating a protruding state of an electric movement mechanism according to a third modification of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments and modifications of the present disclosure will be described with reference to the drawings. Note that common components in the drawings are denoted by the same reference numerals, and descriptions thereof will be omitted as appropriate.

[0010] First, a sash 100 of this embodiment will be described with reference to Fig. 1. Fig. 1 is a front view that schematically shows the sash 100 of this embodiment.

[0011] As shown in Figure 1, the sash 100 comprises an outer frame 1 arranged around an opening portion (not shown), and an inner shroud 2 and an outer shroud 3 (both examples of opening and closing members) arranged inside the outer frame 1.

[0012] The inner shoji screen 2 and the outer shoji screen 3 slide horizontally along rails (not shown) provided on the outer frame 1. Arrows A and B in the drawing indicate the direction of the sliding movement.

[0013] Arrow A indicates the direction in which the inner shoji screen 2 closes (the direction in which the opening is closed) and the direction in which the outer shoji screen 3 opens (the direction in which the opening is opened). On the other hand, arrow B indicates the direction in which the inner shoji screen 2 opens (the direction in which the opening is opened) and the direction in which the outer shoji screen 3 closes (the direction in which the opening is opened).

[0014] The inner shoji screen 2 and the outer shoji screen 3 each have an inner frame 4 made of a non-transparent material. The inner frame 4 is provided with a handle 5 that is gripped when opening or closing the inner shoji screen 2 or outer shoji screen 3, and a transparent electrode glass 6, which is transparent glass provided with a transparent conductive film (not shown; an example of a heating element). Note that although the example given here is one in which the substrate is transparent glass, materials other than transparent glass (for example, transparent resin) may also be used for the substrate.

[0015] An electrode 8 (e.g., a negative electrode) is provided at one end of the transparent electrode glass 6, and an electrode 9 (e.g., a positive electrode) is provided at the other end of the transparent electrode glass 6. The electrode 8 is connected to a conductor 10 provided on the inner frame 4, and the electrode 9 is connected to a conductor 11 provided on the inner frame 4. The other ends of the conductors 10 and 11 are connected to a large coil 13 (see FIGS. 2 to 7) of a wireless power feeder 200, which will be described later. The wireless power feeder 200 is provided in the area enclosed by a dotted line in the figures.

[0016] Although not shown in Fig. 1, the electrodes 8, 9, conductors 10, 11, and wireless power supply device 200 are also provided in the inner frame 4 of the outer screen 3. Also, for the sake of convenience, the electrodes 8, 9, and conductors 10, 11 are explicitly shown in Fig. 1, but in reality, they are provided inside the inner frame 4 so as not to be visible from the outside.

[0017] In addition, although the case where the conductors 10 and 11 are used has been given as an example here, electrodes (rod-shaped or plate-shaped conductive members) may be used instead of the conductors 10 and 11. Although not shown in the figures, a power receiving circuit for receiving power from the large coil 13 may be provided midway along the conductor 11.

[0018] In addition, although the case where the electrodes 8 and 9 are provided at the left and right ends of the transparent electrode glass 6 has been exemplified here, the electrodes 8 and 9 may also be provided at the top and bottom ends of the transparent electrode glass 6.

[0019] Additionally, a key 7 is provided on the inner frame 4 of the inner shoji 2 to lock and unlock the inner shoji 2 and outer shoji 3. Although not shown in the figure, a key receiver that engages with the key 7 is provided on the inner frame 4 of the outer shoji 3. An example of the key 7 is a crescent lock, but it is not limited to this.

[0020] Next, the wireless power feeder 200 of the present embodiment provided in the above-mentioned sash 100 will be described with reference to Figs. 2 to 4. Fig. 2 is a perspective view showing the wireless power feeder 200 in an uninserted state. Fig. 3 is a perspective view showing the wireless power feeder 200 in a partially inserted state. Fig. 4 is a perspective view showing the wireless power feeder 200 in a fully inserted state.

[0021] The wireless power supply device 200 is a device that transmits power wirelessly using an electromagnetic induction method.

[0022] 2 to 4, the wireless power feeder 200 has a small coil 12 and a large coil 13. In this embodiment, an example will be described in which the small coil 12 is used as a power transmitting coil and the large coil 13 is used as a power receiving coil.

[0023] The small coil 12 has a long cylindrical body 14 that penetrates in the axial direction, and a conducting wire 15 that is wound around the outer periphery of the cylindrical body 14.

[0024] The large coil 13 has a long cylindrical body 16 that penetrates in the axial direction, and a conducting wire 15 that is wound around the outer periphery of the cylindrical body 16.

[0025] The inner diameter of the cylindrical body 16 is larger than the outer diameter of the portion of the small coil 12 around which the conductor 15 is wound (hereinafter referred to as the conductor wound portion), which makes it possible to insert the small coil 12 into the large coil 13 (cylindrical body 16).

[0026] Fig. 2 shows a state in which the conductor winding portion of the small coil 12 is not inserted into the large coil 13 (non-inserted state, which can also be said to be a state in which the small coil 12 is close to the large coil 13). Fig. 3 shows a state in which about half of the conductor winding portion of the small coil 12 is inserted into the large coil 13 (half-inserted state). Fig. 4 shows a state in which the conductor winding portion of the small coil 12 is entirely inserted into the large coil 13 (fully inserted state).

[0027] The conducting wire 15 wound around the small coil 12 is connected to a power source (not shown) via a power transmission circuit (not shown).

[0028] The power transmission circuit transmits AC power to the large coil 13 via the small coil 12 when the small coil 12 is close to the large coil 13 (for example, when it is in the non-inserted state shown in FIG. 2) or when the small coil 12 is inserted into the large coil 13 (for example, when it is in the half-inserted state shown in FIG. 3 or the fully-inserted state shown in FIG. 4). The magnitude of the transmitted power is smallest in the non-inserted state shown in FIG. 2, next largest in the half-inserted state shown in FIG. 3, and largest in the fully-inserted state shown in FIG. 4.

[0029] The power sent to the large coil 13 is supplied to the transparent electrode glass 6 via the conductor 11 (and a power receiving circuit, not shown) and the electrode 9. This causes the transparent conductive film to generate heat, preventing the transparent electrode glass 6 from fogging and becoming drenched with moisture.

[0030] Next, the manner in which the small coil 12 and the large coil 13 are installed in the sash 100 and the positional relationship between the small coil 12 and the large coil 13 will be described with reference to Figs. 5 to 7. Figs. 5, 6, and 7 are perspective views showing the non-inserted state, the half-inserted state, and the fully-inserted state of the wireless power feeder 200 in the sash 100, respectively. Note that the following description will be given taking as an example a case in which the small coil 12 and the large coil 13 are installed in the area enclosed by the dotted line in Fig. 1.

[0031] As shown in FIG. 5, the small coil 12 is provided on the outer frame 1, and the large coil 13 is provided on the inner frame 4 of the inner shoji screen 2.

[0032] Specifically, the portion of the small coil 12 other than the portion around which the conductor wire 15 is wound (the portion of the cylindrical body 14 on which the conductor wire 15 is not wound) is housed and fixed within the outer frame 1. The portion around which the conductor wire is wound of the small coil 12 protrudes outside the outer frame 1. The large coil 13 is entirely housed and fixed within the inner frame 4 of the inner screen 2.

[0033] The small coil 12 and the large coil 13 are arranged to face each other and extend along the opening and closing direction of the inner screen 2 (the directions indicated by arrows A and B, respectively).

[0034] The inner screen 2 shown in Figure 5 is slightly open, with the large coil 13 and the small coil 12 spaced apart.

[0035] When the inner screen 2 shown in Fig. 5 moves slightly in the closing direction (the direction of arrow A), the inner screen 2 is in a slightly open state, although it is closer to the state shown in Fig. 5, as shown in Fig. 6. At this time, the wireless power supply device 200 is in a state where about half of the conductor winding portion of the small coil 12 is inserted into the large coil 13 (half-inserted state).

[0036] Furthermore, when the inner screen 2 shown in Fig. 6 moves in the closing direction (the direction of arrow A), the inner screen 2 is brought into a completely closed state as shown in Fig. 7. At this time, the wireless power supply device 200 is brought into a state in which the entire conductor winding portion of the small coil 12 is inserted into the large coil 13 (fully inserted state).

[0037] As described above, the wireless power feeder 200 of this embodiment includes a power transmitting coil (for example, the small coil 12) provided in the outer frame 1 provided around the opening, and a power receiving coil (for example, the large coil 13) provided in the inner frame 4 (for example, the inner frame 4 of the inner screen 2) that can move in a first direction (for example, the direction of arrow A) in which the opening is closed and a second direction (for example, the direction of arrow B) in which the opening is opened, and includes a wire that transmits power wirelessly from the power transmitting coil to the power receiving coil. The present invention is a wireless power supply device, characterized in that the transmitting coil and receiving coil each have a long cylindrical body 14, 16 that penetrates in the axial direction and a conductor 15 wound around the outer periphery of the cylindrical body 14, 16, and are arranged to extend along a first direction and a second direction, and are configured so that when an inner frame 4 (e.g., the inner frame 4 of an inner shoji screen 2) moves in the first direction, one of the transmitting coil and receiving coil (e.g., the small coil 12) is inserted inside the other (e.g., the large coil 13).

[0038] This feature allows the power transmitting coil and the power receiving coil to be in close proximity without being spaced apart in their axial direction (the opening and closing direction of the inner frame 4), thereby further improving the power transmission efficiency.

[0039] In addition, since the power transmission coil and the power receiving coil are arranged to extend in the opening and closing direction of the inner frame 4, power can be transmitted even when the inner screen 2 (or outer screen 3) is slightly open, improving convenience.

[0040] The present disclosure is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present disclosure. Modifications will be described below.

[0041] [Variation 1] In the embodiment, the small coil 12 is used as a power transmitting coil and the large coil 13 is used as a power receiving coil, but the small coil 12 may be used as a power receiving coil and the large coil 13 may be used as a power transmitting coil.

[0042] This specific example will be described with reference to Fig. 8. Fig. 8 is a perspective view showing a state in which the wireless power supply device 200 is not inserted into the sash according to this modification.

[0043] As shown in FIG. 8, the large coil 13 is provided in the outer frame 1, and the small coil 12 is provided in the inner frame 4 of the inner shoji screen 2.

[0044] Specifically, the portion of the small coil 12 other than the portion around which the conductor wire is wound (the cylindrical body 14 on which the conductor wire 15 is not wound) is housed and fixed within the inner frame 4 of the inner screen 2. The portion around which the conductor wire is wound of the small coil 12 protrudes outside the inner frame 4. The entire large coil 13 is housed and fixed within the outer frame 1.

[0045] The small coil 12 and the large coil 13 are arranged to face each other and extend along the opening and closing direction of the inner screen 2 (the directions indicated by arrows A and B, respectively).

[0046] The inner screen 2 shown in Figure 8 is slightly open. At this time, the large coil 13 and the small coil 12 are spaced apart. Although not shown, when the inner screen 2 moves in the closing direction (the direction of arrow A), the small coil 12 and the large coil 13 enter the above-mentioned half-inserted state (see Figure 3) or fully inserted state (see Figure 4).

[0047] The configuration of this modification can achieve the same effects as those of the embodiment.

[0048] [Variation 2] The wireless power supply device 200 having the configuration of the first modification may be provided with a mechanical movement mechanism that mechanically moves the small coil 12 serving as the power receiving coil. Specifically, the mechanical movement mechanism moves the small coil 12 to protrude from or retract into the inner frame 4 of the inner shoji screen 2 in conjunction with the locking and unlocking operations of the key 7, respectively.

[0049] This specific example will be described with reference to Figures 9 and 10. Figure 9 is a front view schematically showing the retracted state of the mechanical moving mechanism 30 of this modified example (a state in which the small coil 12 is retracted into the inner frame 4 by the operation of the mechanical moving mechanism 30). Figure 10 is a front view schematically showing the protruding state of the mechanical moving mechanism 30 of this modified example (a state in which the small coil 12 protrudes outside the inner frame 4 by the operation of the mechanical moving mechanism 30).

[0050] As shown in Figures 9 and 10, the mechanical movement mechanism 30 has a wire 17, a coil spring 18, a mounting member 19, and a guide rail 20. These components are provided in the inner frame 4. Note that, for the sake of convenience, these components are explicitly shown in Figures 9 and 10, but in reality, they are provided inside the inner frame 4 so that they are not visible from the outside.

[0051] The wire 17 is attached to the inner frame 4 via a plurality of pulleys (circular parts in the figure; reference numerals omitted) attached to the inner frame 4. One end of the wire 17 is connected to the key 7, and the other end of the wire 17 is connected to a coil spring 18.

[0052] One end of the coil spring 18 is fixed to the inner frame 4 , and the other end of the coil spring 18 is connected to the wire 17 .

[0053] The small coil 12 (specifically, the portion of the cylindrical body 14 on which the conducting wire 15 is not wound) is fixed to a mounting member 19.

[0054] The mounting member 19 is fixed to the wire 17 and slides horizontally along a guide rail 20 provided on the inner frame 4 .

[0055] When an unlocking operation is performed on the key 7 (see Figure 10) in a locked state, the key 7 enters an unlocked state as shown in Figure 9. At this time, the wire 17 is pulled toward the key 7, and the coil spring 18 enters an elongated state. As a result, the mounting member 19 moves in the direction of arrow B, and the small coil 12 enters a state of being housed inside the inner frame 4.

[0056] When a locking operation is performed on the key 7 in the unlocked state shown in Figure 9, the key 7 enters the locked state as shown in Figure 10. At this time, the wire 17 is unwound from the key 7 and the coil spring 18 enters a contracted state. As a result, the mounting member 19 moves in the direction of arrow A, and the small coil 12 protrudes outside the inner frame 4. Although not shown in the figure, the protruding conductor wound portion of the small coil 12 is inserted into the large coil 13.

[0057] The conductors 10 and 11 connected to the small coil 12 have a certain amount of slack in length so as not to hinder the movement of the small coil 12 described above.

[0058] Although not shown in Figures 9 and 10, the mechanical movement mechanism 30 is also provided in the inner frame 4 of the outer shoji screen 3 shown in Figure 1 in a similar manner.

[0059] According to this modification, the small coil 12 can be inserted into or removed from the large coil 13 in response to an operation on the key 7, which further improves convenience.

[0060] [Variation 3] In the second modification, the mechanical moving mechanism 30 that mechanically moves the small coil 12 has been described as an example, but the present invention is not limited to this. For example, the wireless power feeder 200 having the configuration of the first modification may be provided with an electric moving mechanism that electrically moves the small coil 12.

[0061] This specific example will be described with reference to Figures 11 and 12. Figure 11 is a diagram schematically showing the housed state of the electric movement mechanism 31 of this modified example (a state in which the small coil 12 is housed in the inner frame 4 by the operation of the electric movement mechanism 31). Figure 12 is a diagram schematically showing the protruding state of the electric movement mechanism 31 of this modified example (a state in which the small coil 12 protrudes outside the inner frame 4 by the operation of the electric movement mechanism 31).

[0062] 11 and 12, the electric movement mechanism 31 includes the mounting member 19 described in Modification 2, as well as a microswitch 21, a motor controller 22, a battery 23, and an actuator 24. Although not shown in the figures, these components are provided on the inner frame 4 of the inner shoji screen 2, for example.

[0063] The motor controller 22 is electrically connected to each of the microswitch 21, the battery 23, and the actuator 24.

[0064] The motor controller 22 supplies power from the battery 23 to the actuator 24. The motor controller 22 also controls the actuator 24 in accordance with the on / off state of the microswitch 21 so as to move the mounting member 19 to a predetermined position.

[0065] The actuator 24 includes an electric motor (not shown), and is driven by the electric motor to slide the mounting member 19 in the horizontal direction. Specifically, the mounting member 19 is moved in the direction of arrow A or the direction of arrow B. As described in Modification 2, the small coil 12 is fixed to the mounting member 19.

[0066] The microswitch 21 is a switch whose contact point is turned on when pressed by a protrusion (not shown) provided on the key 7 (see FIG. 1, etc.).

[0067] The contact of the microswitch 21 shown in Fig. 11 is in the OFF state. When the key 7 is operated to lock the door, the protrusion of the key 7 presses down on the top of the microswitch 21. This turns the contact of the microswitch 21 ON, as shown in Fig. 12.

[0068] When the microswitch 21 is turned on in this manner, the motor controller 22 supplies power from the battery 23 to the actuator 24 and controls the actuator 24 to move the mounting member 19 (specifically, the mounting member 19 housed within the inner frame 4 of the inner shoji screen 2) from the position shown in Figure 11 to the position shown in Figure 12. As a result, the small coil 12 housed within the inner frame 4 of the inner shoji screen 2 protrudes outside the inner frame 4. The protruding conductor winding portion of the small coil 12 is inserted into the large coil 13.

[0069] The contact of the microswitch 21 shown in Fig. 12 is in the ON state. When the key 7 is operated to unlock the door at this time, the upper part of the microswitch 21, which has been pressed down by the protrusion of the key 7, is released. This causes the contact of the microswitch 21 to turn OFF, as shown in Fig. 11.

[0070] When the microswitch 21 is turned off in this way, the motor controller 22 supplies power from the battery 23 to the actuator 24 and controls the actuator 24 to move the mounting member 19 (specifically, the mounting member 19 protruding outside the inner frame 4 of the inner shoji screen 2 and inserted into the large coil 13) which is in the position shown in Fig. 12 to the position shown in Fig. 11. As a result, the small coil 12 which was inserted into the large coil 13 is removed from the large coil 13 and placed inside the inner frame 4.

[0071] Although the present modification has been described using a microswitch as an example, the present invention is not limited to this and, instead of the microswitch, a magnetic switch or an optical switch may be used.

[0072] In this manner, in this modified example, as described in modified example 2, the small coil 12 can be inserted into or removed from the large coil 13 depending on the operation of the key 7, thereby further improving convenience.

[0073] [Variation 4] In the embodiment, the sliding direction of the inner and outer shoji screens 2 and 3 is horizontal (left and right), but this is not limiting. For example, either the small coil 12 or the large coil 13 may be provided on an opening and closing member (e.g., a sliding window or a sliding door) that slides vertically (up and down).

[0074] Furthermore, the object on which either the small coil 12 or the large coil 13 is provided is not limited to a sliding opening / closing member. For example, either the small coil 12 or the large coil 13 may be provided on an opening / closing member (for example, a hinged window or a hinged door) that rotates (pivots) around one side as an axis. [Industrial Applicability]

[0075] INDUSTRIAL APPLICABILITY The wireless power supply device of the present disclosure is useful in a technology for wirelessly supplying power to an opening / closing member (for example, a window, a door, a shutter, etc.) that opens and closes an opening by moving in a predetermined direction and the opposite direction. [Explanation of symbols]

[0076] 1 Outer frame 2 Inner Shoji Screen 3. Outer Shoji Screen 4 Inner frame 5 Handle 6 Transparent electrode glass 7 keys 8, 9 electrodes 10, 11 Conductor 12 small coil 13 Large coil 15 Conductor 16 Cylindrical body 17 wires 18 Spring 19 Mounting material 20 Guide rail 21 Microswitch 22 Motor Controller 23 Battery 24 Actuators 30 Mechanical movement mechanism 31 Electric movement mechanism 100 sashes 200 Wireless power supply device

Claims

1. a power transmission coil provided on an outer frame provided around the opening; a power receiving coil provided on an inner frame that is movable in a first direction in which the opening portion is in a closed state and in a second direction in which the opening portion is in an open state; A wireless power feeder that wirelessly transmits power from the power transmitting coil to the power receiving coil, The power transmitting coil and the power receiving coil each have The coil has a long cylindrical body that penetrates in the axial direction and a conducting wire wound around the outer periphery of the cylindrical body, The film is provided to extend along the first direction and the second direction, When the inner frame moves in the first direction, one of the power transmitting coil and the power receiving coil is inserted into the other. Wireless power supply device.

2. The power transmitting coil is configured to be inserted inside the power receiving coil, the power transmission coil is provided so as to protrude outside the outer frame, The power receiving coil is provided inside the inner frame. The wireless power supply device according to claim 1 .

3. The receiving coil is configured to be inserted inside the transmitting coil, the power transmission coil is provided inside the outer frame, The power receiving coil is provided so as to protrude outside the inner frame. The wireless power supply device according to claim 1 .

4. The inner frame is provided with a key for locking and unlocking the inner frame, The locking mechanism further includes a moving mechanism that moves the power receiving coil in response to each of the locking operation and the unlocking operation, The moving mechanism includes: When the locking operation is performed, The power receiving coil accommodated inside the inner frame is protruded to the outside of the inner frame and inserted into the power transmitting coil provided inside the outer frame, When the unlocking operation is performed, The power receiving coil inserted inside the power transmitting coil is removed from the power transmitting coil and housed inside the inner frame. The wireless power supply device according to claim 1 .

5. a heating element that generates heat using the electric power is provided in the inner frame, The receiving coil is electrically connected to the heating element; The wireless power supply device according to claim 1 .

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