JP7463975B2 - In-vehicle wireless charging device - Google Patents

Description

The present invention relates to an in-vehicle wireless charging device.

Various technologies related to in-vehicle wireless charging devices have been proposed. For example, the following Patent Document 1 describes an in-vehicle wireless charging device that allows passengers to intuitively recognize when they have left their mobile phone behind. With such in-vehicle wireless charging devices, there is a risk that the mobile phone may move out of the charging range of the wireless charging device due to vibrations and shocks caused while the vehicle is traveling, making it impossible to charge. To address this issue, a moving coil system has been proposed that includes a two-dimensional movement mechanism that moves the power transmission coil of the wireless charging device in the X-Y directions in accordance with the mobile phone's position (see Patent Document 2, etc.).

JP 2013-38870 A JP 2012-130139 A

However, with in-vehicle wireless charging devices, the amount of space available inside a vehicle is limited, making it difficult to enlarge the two-dimensional movement mechanism that moves the power transmission coil, and therefore making it difficult to expand the charging range of devices to be charged, such as mobile phones.

The present invention was conceived in light of these points, and aims to provide an in-vehicle wireless charging device that can expand the charging range of a charged device such as a mobile phone without changing the mounting space inside the vehicle.

In order to solve the above problem, the first aspect of the present invention includes a power transmission coil that transmits power contactlessly by electromagnetic induction to a power receiving coil built into a charged device, a power transmission coil support base on which the power transmission coil is attached, a case that houses the power transmission coil support base and has an upper surface plate on which the charged device is placed, and is mounted in a vehicle, a two-dimensional movement mechanism that is disposed in the case and moves the power transmission coil support base along the inner surface of the upper surface plate, a position detection device that detects the position of the power receiving coil of the charged device placed on the upper surface plate, and a power transmission coil that moves the power transmission coil close to the position of the power receiving coil detected by the position detection device. and a control device that drives and controls the two-dimensional movement mechanism to move the power transmission coil support base in the X direction, the two-dimensional movement mechanism having an X-direction movement mechanism that moves the power transmission coil support base in the X direction and a Y-direction movement mechanism that moves the power transmission coil support base in the Y direction perpendicular to the X direction, the X-direction movement mechanism having an X-direction guide mechanism that guides the central axis of the power transmission coil to tilt diagonally outward in the X direction as the power transmission coil support base moves from the center position in the X direction to both ends, and the Y-direction movement mechanism having a Y-direction guide mechanism that guides the central axis of the power transmission coil to not tilt in the Y direction.

The second invention of the present invention is an in-vehicle wireless charging device according to the first invention, in which the X-direction movement mechanism includes an axial X-direction slider with a circular cross section that moves in the X-direction while supporting the power transmission coil support base so that it can slide in the Y-direction, an X-direction drive motor attached to one end of the X-direction slider, and a pinion gear fixed to the motor shaft of the X-direction drive motor, and the X-direction guide mechanism includes a pair of X-direction guide shafts that are formed in an arc shape with a predetermined radius of curvature protruding upward and support both ends of the X-direction slider so that they can slide in the X-direction, and a rack that is formed in an arc shape with a predetermined radius of curvature protruding upward so as to face each other over the entire length of the X-direction guide shaft that supports the one end of the X-direction slider and meshes with the pinion gear.

The third aspect of the present invention is an in-vehicle wireless charging device according to the second aspect of the present invention, in which the X-direction slider has a pair of X-direction guide parts at both ends, each of which has an X-direction guide hole that protrudes upward along the X-direction and penetrates in an arc shape with a predetermined radius of curvature, and the pair of X-direction guide shafts are slidably inserted into the X-direction guide holes of the pair of X-direction guide parts.

The fourth aspect of the present invention is an in-vehicle wireless charging device according to the second or third aspect of the present invention, in which the power transmission coil support base is provided with a Y-direction insertion hole with a circular cross section that penetrates along the Y direction and through which the X-direction slider is inserted.

Next, the fifth invention of the present invention is an in-vehicle wireless charging device according to any one of the second to fourth inventions, in which the Y-direction movement mechanism is formed in an arc shape with a predetermined radius of curvature protruding upward, and has a Y-direction slider that moves in the Y direction while supporting the power transmission coil support base so that it can slide in the X direction, a screw shaft that is arranged along the Y direction so as to face the X-direction slider over the entire length, and into which a nut member provided on one end of the Y-direction slider is screwed, and a Y-direction drive motor that rotates and drives the screw shaft, and the Y-direction guide mechanism unit has a Y-direction guide shaft that is arranged along the Y direction so as to face the X-direction slider over the entire length, and supports the other end of the Y-direction slider so that it can slide.

The sixth aspect of the present invention is an in-vehicle wireless charging device according to the fifth aspect of the present invention, in which the Y-direction slider has a Y-direction guide portion provided on the other end side and having a Y-direction guide hole penetrating along the Y direction, and the Y-direction guide shaft is slidably inserted into the Y-direction guide hole of the Y-direction guide portion.

The seventh aspect of the present invention is an in-vehicle wireless charging device according to the fifth or sixth aspect of the present invention, in which the power transmission coil support base is provided with an X-direction insertion hole through which the Y-direction slider is inserted, penetrating the power transmission coil support base in an arc shape with a predetermined radius of curvature protruding upward along the X-direction.

According to the first invention, a two-dimensional movement mechanism is disposed in a case mounted in a vehicle, which moves a power transmission coil support base, on which a power transmission coil is mounted, in the X and Y directions along the inner surface of the top plate. As the power transmission coil support base moves from the center position in the X direction to both ends, the power transmission coil support base is guided so that the central axis of the power transmission coil is tilted diagonally outward in the X direction, and is guided so that the central axis of the power transmission coil is not tilted in the Y direction.

Therefore, as the power transmission coil moves from the center position in the X direction to both ends, the central axis of the power transmission coil tilts diagonally outward in the X direction, so that the chargeable area formed around the central axis of the power transmission coil tilts diagonally outward in the X direction. On the other hand, the central axis of the power transmission coil does not tilt in the Y direction, so the chargeable area formed around the central axis of the power transmission coil does not tilt in the Y direction. As a result, the chargeable range on the top plate of the case in which the charged device can be charged by the power transmission coil is expanded outward in both directions in the X direction by the tilt angle of the chargeable area formed around the central axis of the power transmission coil. This makes it possible to expand the chargeable range of a charged device, such as a mobile phone, on the top plate in both directions in the X direction without changing the installation space for installing the case in the vehicle.

According to the second invention, the rack that meshes with the pinion gear is formed in an arc shape with a predetermined radius of curvature that protrudes upward, and is arranged to face the entire length of the X-direction guide shaft that supports one end of the X-direction slider. Then, by rotating the X-direction drive motor forward and backward, the shaft-like X-direction slider with a circular cross section slides along a pair of X-direction guide shafts that are formed in an arc shape with a predetermined radius of curvature that protrudes upward. This makes it possible, with a simple configuration, to tilt the central axis of the power transmission coil diagonally outward in the X-direction as the power transmission coil moves from the center position in the X-direction to both ends.

According to the third invention, the X-direction slider has an X-direction guide hole formed in a pair of X-direction guide sections provided at both ends, which penetrates in an arc shape with a predetermined radius of curvature protruding upward along the X direction. The pair of X-direction guide shafts are slidably inserted into the X-direction guide holes of the pair of X-direction guide sections. This allows the X-direction slider to move in an arc shape with a predetermined radius of curvature protruding upward, and the power transmission coil support base to move in an arc shape with a predetermined radius of curvature protruding upward.

According to the fourth invention, the power transmission coil support base is provided with a Y-direction insertion hole with a circular cross section that penetrates along the Y direction and through which the X-direction slider is inserted. This allows the power transmission coil support base to freely rotate around the X-direction slider when the X-direction slider moves in the X direction, and the central axis of the power transmission coil can be tilted diagonally outward in the X direction. In addition, the power transmission coil support base can be moved smoothly to both ends in the Y direction without tilting the central axis of the power transmission coil in the Y direction.

According to the fifth invention, the shaft-shaped Y-direction slider is formed in an arc shape with a predetermined radius of curvature protruding upward, and a nut member provided on one end side is screwed into a screw shaft arranged along the Y direction, while the other end side is supported so as to be slidably movable on the Y-direction guide shaft. As a result, by rotating the Y-direction drive motor forward and backward, the Y-direction slider slides along the Y-direction guide shaft. This allows the power transmission coil to be moved smoothly to both ends in the Y direction with a simple configuration without tilting the central axis of the power transmission coil in the Y direction. In addition, as the X-direction slider moves in the X direction, the power transmission coil support base can be moved along the Y-direction slider formed in an arc shape with a predetermined radius of curvature protruding upward.

According to the sixth aspect of the present invention, the Y-direction slider has a Y-direction guide hole formed in a Y-direction guide section provided on the other end side thereof, which penetrates along the Y direction. The Y-direction guide shaft is slidably inserted into the Y-direction guide hole of the Y-direction guide section. This allows the Y-direction slider to be moved in the Y direction without causing the central axis of the power transmission coil mounted on the power transmission coil support base to tilt in the Y direction.

According to the seventh invention, the power transmission coil support base is provided with an X-direction insertion hole that penetrates in an arc shape with a predetermined radius of curvature protruding upward along the X-direction and through which the Y-direction slider is inserted. As a result, when the Y-direction slider moves in the Y-direction, the power transmission coil support base moves along the X-direction slider that is formed in an axial shape, so that the power transmission coil can be moved without tilting its central axis in the Y-direction. As a result, when the X-direction slider moves in the X-direction, the power transmission coil support base can be moved smoothly along the Y-direction slider to both ends in the X-direction.

1 is a diagram showing an example of a state in which an in-vehicle wireless charging device according to an embodiment of the present invention is mounted on a vehicle. FIG. 1 is a schematic perspective view showing an example of a two-dimensional movement mechanism of an in-vehicle wireless charging device. 1 is a schematic plan view showing an example of a two-dimensional movement mechanism of an in-vehicle wireless charging device. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3. FIG. 11 is a perspective view illustrating an example of a power transmission coil support base having a power transmission coil attached to an upper surface thereof. FIG. 2 is a block diagram showing an example of a control configuration of an in-vehicle wireless charging device.

The following is a detailed explanation of one embodiment of the in-vehicle wireless charging device according to the present invention, with reference to the drawings. First, the mounting position of the in-vehicle wireless charging device 11 will be explained with reference to FIG. 1. Note that the arrow X shown appropriately in each figure indicates the rear side of the vehicle, and the arrow Z indicates the upper side of the vehicle. Furthermore, the arrow Y indicates the left side in the vehicle width direction, which is perpendicular to the arrow X. In the following explanation, descriptions of directions will be made based on this direction.

As shown in FIG. 1, a handle 3 is disposed at the front of the vehicle interior 2 of the vehicle body 1, and vehicle electronic devices 5 are disposed to the left of the handle 3. Furthermore, a console box 6 provided to the left of the handle 3 and below the vehicle electronic devices 5 is equipped with a vehicle wireless charging device (hereinafter simply referred to as "charging device") 11 that charges a portable device, for example, a charged device 8 such as a mobile phone (see FIG. 4), in a non-contact manner by electromagnetic induction. In addition, a charging switch 12 that turns the charging device 11 on and off is disposed on the upper surface of the console box 6 adjacent to the right side of the charging device 11 in the vehicle width direction, that is, on the driver's seat side. The charging switch 12 may be disposed adjacent to the charging device 11 on the front side or rear side of the vehicle.

Next, the schematic configuration of the charging device 11 will be described with reference to Figs. 2 to 5. As shown in Figs. 2 and 4, the charging device 11 includes a built-in power transmission coil 13 that generates an electromotive force by electromagnetic induction in a power receiving coil 8A built into the charged device 8 and transmits power contactlessly, a case 16 having a top plate 15 on which the charged device 8 is placed, and a two-dimensional movement mechanism 17 housed within the case 16. In addition, power for driving the charging device 11 and power used for transmitting power to the power receiving coil 8A are supplied from a car battery (not shown) mounted on the vehicle body 1.

The two-dimensional movement mechanism 17 moves the power transmission coil 13 in the X direction (front-rear direction of the vehicle) and the Y direction (vehicle width direction) so that the central axis 13A of the power transmission coil 13 tilts diagonally outward in the X direction as the power transmission coil 13 moves from the center position in the X direction along the inner surface of the top plate 15 to both sides outward in the X direction. In addition, a known position detection sensor 18 (see, for example, JP 2009-247194 A) that detects the position of the power receiving coil 8A built into the charged device 8 placed on the top plate 15 and outputs a detection signal is provided over almost the entire inner surface of the top plate 15.

Next, the two-dimensional movement mechanism 17 will be described with reference to Figs. 2 to 5. As shown in Figs. 2 to 4, the two-dimensional movement mechanism 17 is composed of an X-direction movement mechanism 23 that moves the power transmission coil support base 21, on whose upper surface the power transmission coil 13 is mounted, in the X-direction (the front-to-rear direction of the vehicle), and a Y-direction movement mechanism 25 that moves the power transmission coil support base 21 in the Y-direction (the width direction of the vehicle).

The X-direction movement mechanism 23 is provided with an X-direction slider 27 arranged along the Y direction and formed in the shape of a shaft with a circular cross section that moves in the X direction, and a pair of X-direction guide shafts 28A, 28B arranged to face each other in the Y direction over almost the entire length in the X direction near both side walls 16A, 16B on the Y direction side of the case 16. The X-direction movement mechanism 23 also includes a pair of X-direction guide parts 29A, 29B fixed to both ends of the X-direction slider 27 and through which the pair of X-direction guide shafts 28A, 28B are slidably inserted.

The pair of X-direction guide shafts 28A, 28B are formed in an arc shape with a predetermined radius of curvature protruding upward, and both ends of each are fixed to plate-shaped shaft support parts 31 erected on the bottom surface of the case 16. Each X-direction guide part 29A, 29B is formed with an X-direction guide hole 32 with the same radius of curvature as each X-direction guide shaft 28A, 28B, through which each X-direction guide shaft 28A, 28B is slidably inserted. In addition, an X-direction drive motor 33 composed of a stepping motor or the like is attached to the Y-direction outer surface of the X-direction guide part 29A that supports the end (one end side) of the X-direction slider 27 on the outer side in the Y-direction (left side in the vehicle width direction) with the motor shaft 33A facing outward in the Y-direction.

A pinion gear 35 is attached to the motor shaft of the X-direction drive motor 33. A rack 36 that meshes with the pinion gear 35 is arranged to face the entire length of the X-direction guide shaft 28A that is slidably inserted into the X-direction guide portion 29A. The rack 36 is formed in an arc shape with a predetermined radius of curvature that protrudes upward, and is arranged along the X direction on the bottom surface of the case 16. As a result, by driving the X-direction drive motor 33 in forward and reverse rotation, the X-direction slider 27 is guided by the pair of X-direction guide shafts 28A, 28B and can move back and forth in the X direction along an arc-shaped track with a predetermined radius of curvature that protrudes upward.

Next, the Y-direction movement mechanism 25 is provided with a Y-direction slider 41 arranged along the X-direction and formed in an arc shape with a circular cross section and a predetermined radius of curvature protruding upward, which moves in the Y-direction, a Y-direction guide shaft 42 arranged along the Y-direction over almost the entire length between the pair of X-direction guide shafts 28A, 28B near the side wall 16C on one side of the X-direction side of the case 16 (e.g., the rear side of the vehicle), and a screw shaft 43 arranged along the Y-direction so as to be parallel to the Y-direction guide shaft 42 over almost the entire length between the pair of X-direction guide shafts 28A, 28B near the side wall 16D on the other side of the X-direction side of the case 16 (e.g., the front side of the vehicle).

The Y-direction movement mechanism 25 also includes a Y-direction guide section 45 that is fixed to the end of the Y-direction slider 41 on the Y-direction guide shaft 42 side (the other end side) and through which the Y-direction guide shaft 42 is slidably inserted, and a nut member 46 that is fixed to the end of the Y-direction slider 41 on the screw shaft 43 side (one end side) and screwed onto the screw shaft 43. A Y-direction guide hole 45A is formed through the Y-direction guide section 45, and the Y-direction guide shaft 42 is slidably inserted. The nut member 46 is formed with a female thread 46A that meshes with the screw shaft 43.

The Y-direction guide shaft 42 is formed in a shaft shape with a circular cross section, and both ends are fixed to a pair of plate-shaped shaft supports 47 erected on the bottom surface of the case 16. The screw shaft 43 is rotatably attached to a pair of plate-shaped screw shaft supports 48A, 48B erected on the bottom surface of the case 16. A gear 51 is fixed to the end of the screw shaft 43 on the opposite side in the Y direction to the X-direction drive motor 33.

In addition, a Y-direction drive motor 53, which has a pinion gear 52 that meshes with a gear 51 attached to a motor shaft 53A, is fixed to the back surface of the screw shaft 43 on the opposite side in the Y direction to the screw shaft support part 48A on the opposite side in the Y direction to the X-direction drive motor 33. The Y-direction drive motor 53 is composed of a stepping motor or the like. As a result, by driving the Y-direction drive motor 53 in forward and reverse rotation, the screw shaft 43 is rotated in reverse and forward, and the Y-direction slider 41 is guided in parallel to the Y direction along the Y-direction guide shaft 42 via the Y-direction guide part 45, and can move back and forth in the Y direction via the nut member 46 that meshes with the screw shaft 43.

Next, the power transmission coil support base 21 will be described with reference to Figs. 3 to 5. As shown in Fig. 5, the power transmission coil support base 21 has a rectangular shape in plan view with each side formed along the X and Y directions, and has a flat plate portion 61 on whose upper surface the power transmission coil 13 is attached, and a rib portion 62 with a rectangular cross section that protrudes downward in the Y direction from approximately the center in the X direction on the lower surface of the flat plate portion 61 across the entire width in the Y direction.

As shown in Figures 3 and 5, the power transmission coil support base 21 has a cylindrical portion 63 that is provided at the end edge of the flat plate portion 61 opposite the X-direction drive motor 33 and that protrudes upward from the bottom surface over the entire width in the X direction. The cylindrical portion 63 has an X-direction insertion hole 65 that is circular in cross section and penetrates in an arc shape with a predetermined radius of curvature that protrudes upward along the X direction, through which the Y-direction slider 41 is slidably inserted. Therefore, the Y-direction slider 41 moves in the Y direction while supporting the power transmission coil support base 21 so that it can slide in the X direction.

As shown in Figs. 4 and 5, the rib portion 62 is provided with a Y-direction insertion hole 66 having a circular cross section that penetrates along the Y direction and through which the shaft-shaped X-direction slider 27 having a circular cross section is slidably inserted. Therefore, the X-direction slider 27 moves in the X direction while supporting the power transmission coil support base 21 so as to be slidably movable in the Y direction.

As a result, as shown in FIG. 2, when the X-direction slider 27 moves in the X direction, the power transmission coil support base 21 moves in the X direction along the Y-direction slider 41, and when the Y-direction slider 41 moves in the Y direction, the power transmission coil support base 21 moves in the Y direction along the X-direction slider 27. Therefore, the power transmission coil support base 21 moves in the X-Y directions in accordance with the movements of the X-direction slider 27 and the Y-direction slider 41.

Next, the control configuration of the charging device 11 will be described. First, as shown in Figs. 2 to 4, the charging device 11 has a circuit board 56 disposed on the inner bottom surface of the case 16. As shown in Fig. 6, the circuit board 56 is equipped with a control device 71 that controls the entire charging device 11, a position detection circuit 73, a motor drive control circuit 75, a power transmission control circuit 77, and the like. The control device 71 is a well-known device that includes a CPU 71A, a RAM 71B, an EEPROM 71C, a timer 71D, and the like. The CPU 71A executes various calculation processes based on various programs and various parameters stored in the EEPROM 71C. In addition, the RAM 71B temporarily stores the results of calculations by the CPU 71A and data input from each detection device, and the like.

The position detection circuit 73 receives a detection signal from the position detection sensor 18. Based on the detection signal input from the position detection sensor 18, the position detection circuit 73 detects the position of the receiving coil 8A built into the charged device 8 placed on the upper plate 15, and outputs position information of the receiving coil 8A to the control device 71. The motor drive control circuit 75 outputs drive pulses to each of the X-direction drive motor 33 and the Y-direction drive motor 53 according to the control signal input from the control device 71. The power transmission control circuit 77 supplies high-frequency power of 20 kHz to 1 MHz to the power transmission coil 13 according to the ON/OFF signal input from the control device 71. The charging switch 12 is also electrically connected to the control device 71, and ON/OFF signals are input.

In the charging device 11 configured as described above, when the user places the charged device 8 on the top plate 15 and turns the charging switch 12 ON, the control device 71 repeats the following operations at predetermined intervals (e.g., several tens to several hundreds of milliseconds) until the charging switch 12 is turned OFF again. Then, when the user turns the charging switch 12 OFF, the control device 71 ends the following operations. Note that the charging switch 12 is normally OFF.

Specifically, the control device 71 calculates the center position (X-Y coordinates) of the power receiving coil 8A on the upper panel 15 from the position information of the power receiving coil 8A input from the position detection circuit 73. The control device 71 then calculates the amount of movement in each of the X and Y directions from the current position (X-Y coordinates) of the power transmitting coil 13 to the power transmitting position (X-Y coordinates) where the central axis 13A of the power transmitting coil 13 passes through the center position of the power receiving coil 8A.

Then, the control device 71 calculates the number of drive pulses and rotation direction of the X-direction drive motor 33 corresponding to the amount of movement in the X-direction, and outputs them to the motor drive control circuit 75. The control device 71 also calculates the number of drive pulses and rotation direction of the Y-direction drive motor 53 corresponding to the amount of movement in the Y-direction, and outputs them to the motor drive control circuit 75. The motor drive control circuit 75 then drives the X-direction drive motor 33 in the specified rotation direction by the specified number of drive pulses, and drives the Y-direction drive motor 53 in the specified rotation direction by the specified number of drive pulses. As a result, the power transmission coil support base 21 is moved closer to the power receiving coil 8A, and the central axis 13A of the power transmission coil 13 moves to the power transmission position (X-Y coordinates) that passes through the center position of the power receiving coil 8A.

The control device 71 then reads out a predetermined transmission power previously stored in the EEPROM 71C and outputs it to the transmission control circuit 77. As a result, the transmission control circuit 77 outputs high-frequency power of 20 kHz to 1 MHz to the transmission coil 13 with the transmission power input from the control device 77. As a result, the transmission coil 13 is mounted spirally wound on a plane parallel to the upper surface of the transmission coil support base 21, and radiates AC magnetic flux perpendicular to the transmission coil support base 21 upward from the transmission coil support base 21. As a result, an electromotive force is generated in the receiving coil 8A by electromagnetic induction, and power is transported, charging the built-in secondary battery (not shown) of the charged device 8.

As shown in FIG. 4, in the charging device 11 configured as described above, the Y-direction slider 41 is formed in an arc shape with a predetermined radius of curvature that protrudes upward along the X-direction. Therefore, when the power transmission coil support base 21 moves to both ends in the X-direction along the Y-direction slide shaft 41, the central axis 13A of the power transmission coil 13 is inclined diagonally outward in the X-direction by an angle θ1 with respect to the direction perpendicular to the top plate 15. As a result, the AC magnetic flux radiated from the power transmission coil 13 is also inclined diagonally outward in the X-direction by an angle θ1 with respect to the direction perpendicular to the top plate 15.

On the other hand, because the X-direction slider 27 is formed in an axial shape, when the power transmission coil support base 21 moves along the X-direction slider 27, the central axis 13A of the power transmission coil 13 moves parallel to the direction perpendicular to the top plate 15 and does not tilt in the Y direction. As a result, the AC magnetic flux radiated from the power transmission coil 13 also moves parallel to the direction perpendicular to the top plate 15 and does not tilt in the Y direction.

3, the chargeable range 81 of the charged device 8 on the top plate 15 of the charging device 11 is set to a rectangular shape in plan view that is long in the X direction. This chargeable range 81 is expanded by a length X1 in plan view to both sides outward in the X direction by an inclination angle θ1 of the chargeable area formed around the central axis 13A of the power transmission coil 13, compared to the chargeable range 82 of the charged device 8 when the Y-direction slider 41 is formed into a straight shaft shape with a circular cross section. This allows the chargeable range 81 of the charged device 8, such as a mobile phone, on the top plate 15 to be expanded to both sides outward in the X direction (both outward in the front-rear direction of the vehicle) without changing the mounting space for mounting the case 16 in the console box 6.

Here, the pair of X-direction guide shafts 28A, 28B and the rack 36 constitute an example of an X-direction guide mechanism. The Y-direction guide shaft 42 functions as an example of a Y-direction guide mechanism. The position detection sensor 18 and the position detection circuit 73 constitute an example of a position detection device.

The in-vehicle wireless charging device of the present invention is not limited to the configuration, structure, appearance, shape, processing procedure, etc. described in the above embodiment, and various modifications, improvements, additions, and deletions are possible without changing the gist of the present invention. In the following description, the same reference numerals as those of the charging device 11, etc. in the above embodiment in Figures 1 to 6 indicate the same or equivalent parts as the charging device 11, etc. in the above embodiment.

(A) For example, the two-dimensional movement mechanism 17 of the charging device 11 may be arranged such that the X-direction movement mechanism 23 is arranged along the Y direction (vehicle width direction) and the Y-direction movement mechanism 25 is arranged along the X direction (vehicle front-rear direction). This allows the chargeable range 81 of the charged device 8 on the top plate 15 of the charging device 11 to be expanded to both outside in the Y direction (both outside in the vehicle width direction).

(B) For example, the charging device 11 may be fixedly installed not only in the console box 6 but also in an instrument panel tray, on top of the dashboard, etc. This allows the user to charge the secondary battery built into the charged device 8 while driving the vehicle, etc.

Reference Signs List 8: Charged device 8A: Power receiving coil 11: Vehicle wireless charging device 13: Power transmitting coil 15: Upper plate 16: Case 17: Two-dimensional movement mechanism 18: Position detection sensor 21: Power transmitting coil support base 23: X-direction movement mechanism 25: Y-direction movement mechanism 27: X-direction slider 28A, 28B: X-direction guide shaft 29A, 29B: X-direction guide section 32: X-direction guide hole 33: X-direction drive motor 35: Pinion gear 36: Rack 41: Y-direction slider 42: Y-direction guide shaft 43: Screw shaft 45: Y-direction guide section 45A: Y-direction guide hole 46: Nut member 53: Y-direction drive motor 65: X-direction insertion hole 66: Y-direction insertion hole 71: Control device

Claims (7)

a transmitting coil that transmits electric power to a receiving coil built in the charged device in a wireless manner by electromagnetic induction;
a power transmission coil support base on which the power transmission coil is mounted; and
a case that houses the power transmission coil support base and has an upper plate on an upper surface of which the charged device is placed, the case being mounted in a vehicle;
a two-dimensional movement mechanism that is disposed in the case and moves the power transmitting coil support base along an inner surface of the top plate;
a position detection device that detects the position of the power receiving coil of the charged device placed on the upper plate;
a control device that drives and controls the two-dimensional movement mechanism so as to move the power transmitting coil closer to the position of the power receiving coil detected by the position detection device;
Equipped with
The two-dimensional movement mechanism includes:
an X-direction moving mechanism that moves the power transmission coil support base in an X-direction;
a Y-direction moving mechanism that moves the power transmitting coil support base in a Y direction perpendicular to the X direction;
having
the X-direction movement mechanism includes an X-direction guide mechanism that guides the power transmission coil so that a central axis of the power transmission coil is inclined obliquely outward in the X-direction as the power transmission coil support base moves from a central position in the X-direction to both ends,
the Y-direction movement mechanism has a Y-direction guide mechanism that guides the central axis of the power transmission coil so as not to incline in the Y direction;
In-vehicle wireless charging device. The in-vehicle wireless charging device according to claim 1,
The X-direction movement mechanism includes:
an X-direction slider having a circular cross section and a shaft shape that moves in the X direction in a state in which the power transmission coil support base is supported so as to be slidable in the Y direction;
an X-direction drive motor attached to one end side of the X-direction slider;
a pinion gear fixed to a motor shaft of the X-direction drive motor;
having
The X-direction guide mechanism includes:
a pair of X-direction guide shafts each formed in an upwardly protruding arc shape having a predetermined radius of curvature, and supporting both ends of the X-direction slider so as to be slidable in the X-direction;
a rack that is disposed to face the pinion gear over the entire length of the X-direction guide shaft that supports the one end of the X-direction slider, the rack being formed in an arc shape having a predetermined radius of curvature protruding upward, and meshing with the pinion gear;
having
In-vehicle wireless charging device. The in-vehicle wireless charging device according to claim 2,
the X-direction slider has a pair of X-direction guide portions provided at both ends, each having an X-direction guide hole that projects upward along the X-direction and penetrates in an arc shape with a predetermined radius of curvature;
The pair of X-direction guide shafts are slidably inserted into the X-direction guide holes of the pair of X-direction guide portions, respectively.
In-vehicle wireless charging device. The in-vehicle wireless charging device according to claim 2 or 3,
The power transmission coil support base is provided with a Y-direction insertion hole having a circular cross section, the Y-direction insertion hole penetrating along the Y direction and through which the X-direction slider is inserted.
In-vehicle wireless charging device. The in-vehicle wireless charging device according to any one of claims 2 to 4,
The Y-direction moving mechanism includes:
a Y-direction slider that is formed in an arc shape having a predetermined radius of curvature and protrudes upward, and that moves in the Y direction while supporting the power transmission coil support base so as to be slidable in the X direction;
a screw shaft disposed along the Y direction so as to face the X direction slider over the entire length thereof, and into which a nut member provided on one end of the Y direction slider is screwed;
A Y-direction drive motor that rotates the screw shaft;
having
The Y-direction guide mechanism includes:
a Y-direction guide shaft that is disposed along the Y direction so as to face the X-direction slider over the entire length thereof and that slidably supports the other end side of the Y-direction slider;
In-vehicle wireless charging device. The in-vehicle wireless charging device according to claim 5,
the Y-direction slider has a Y-direction guide portion provided on the other end side and having a Y-direction guide hole penetrating along the Y direction;
The Y-direction guide shaft is slidably inserted into the Y-direction guide hole of the Y-direction guide portion.
In-vehicle wireless charging device. The in-vehicle wireless charging device according to claim 5 or 6,
The power transmission coil support base is provided with an X-direction insertion hole that penetrates the power transmission coil support base in an arc shape having a predetermined radius of curvature and protrudes upward along the X-direction, and through which the Y-direction slider is inserted.
In-vehicle wireless charging device.

Images