JP2010273466A - Device for moving transmission coil in contactless charger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a device for moving transmission coils of a contactless charger, capable of efficiently moving transmission coils to positions for efficient charge, even at readily positioning of electronic equipment including built-in power receiving coils in the contactless charger, and capable of being thinned. <P>SOLUTION: The moving device includes: a link table attached to a baseplate slidably and movably in an X direction; an X-direction moving mechanism for allowing an X-axis control motor to slide and move the link table in an X direction; a Y-direction moving mechanism including a screw shaft rotated by a Y-axis control motor attached to the link table to position a shaft center in a direction perpendicular to a moving direction in the X direction; a power transmission coil support including a power transmission coil moving in a Y direction by the forward/reverse rotation of the screw shaft in the Y-direction moving mechanism; a detection sensor for detecting the position of a power receiving coil in the electronic equipment including the built-in power receiving coil; and an operation control circuit that moves the power transmission coil to a detected position and operates the X- and Y-direction moving mechanisms. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a power transmission coil of a non-contact charger that moves a power transmission coil to a position detected by a detection sensor and charges an electronic device incorporating a power reception coil such as a mobile phone, a camera, a PDA, or a portable electronic terminal in a non-contact manner. It relates to a mobile device.

  Conventionally, a non-contact charger that charges a power receiving coil of an electronic device in a non-contact manner cannot be efficiently charged unless the power receiving coil of the electronic device is accurately positioned in a power transmission coil portion of the non-contact charger. For this reason, the power transmission coil portion of the non-contact charger is fixedly installed, and the power reception coil of the electronic device is accurately positioned on the power transmission coil portion to perform charging.

  Further, it is considered by the present applicant that the position of the power receiving coil of the electronic device is detected by a detection sensor, and the power transmitting coil is moved to the detection position by using a planetary gear. It is difficult to accurately position the power receiving coil of the electronic device on the power transmitting coil portion of the contact charger, and there is a drawback that the charging efficiency decreases if the position is slightly shifted. The latter has a complicated structure and tends to be expensive. However, it was difficult to cope with further thinning.

JP 2009-89464 A JP2008-301553 JP-A-9-190938

  In view of the above-described conventional drawbacks, the present invention can move the power transmission coil to a position where the power reception coil can be efficiently charged even if the electronic device having the power reception coil built in the non-contact charger is easily positioned. And it aims at providing the moving device of the power transmission coil of the non-contact charger which can achieve thickness reduction.

  The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.

  However, the drawings are for explanation only and do not limit the technical scope of the present invention.

  To achieve the above object, the present invention provides a base plate, a plate-like link table attached to the base plate so as to be slidable in the X direction, and a reduction mechanism for reducing the driving force of the X-axis control motor. The movement mechanism in the X direction is slid in the X direction with a plate-like operating arm via the, and the shaft is attached to the link table so that the axis is positioned in a direction perpendicular to the movement direction in the X direction of the link table. A Y-direction moving mechanism having a screw shaft rotated by a Y-axis control motor, and a power transmission coil support base provided with a power transmission coil that moves in the Y direction by forward / reverse rotation of the screw shaft of the Y-direction moving mechanism; A case body attached to the base plate so as to cover the X-direction movement mechanism, the Y-direction movement mechanism and the power transmission coil, and a power receiving coil mounted on the case body A detection sensor provided in the case body that can detect the position of the power receiving coil of the electronic device incorporating the sensor, and the X-direction moving device that moves the power transmission coil to the position detected by the detection sensor; A moving device for the power transmission coil of the non-contact charger is configured with an operation control circuit that operates the moving device in the Y direction.

As is clear from the above description, the present invention has the following effects.
(1) The plate-like link table is moved in the X direction by an X-direction moving mechanism using a plate-like operating arm, and the Y-direction moving mechanism using a screw shaft attached to the link table is moved in the Y direction. Since it is moved, the power transmission coil can be moved in the X and Y directions with substantially the thickness of the moving mechanism in the Y direction.
Therefore, the movement mechanism in the X direction and the movement mechanism in the Y direction overlap each other as in the conventional case, so that the movement device can be prevented from becoming thicker, and the thickness can be reduced.
(2) The X-direction moving mechanism using a plate-like operating arm can reduce the thickness, and an X-axis control motor and a speed reduction mechanism can be arranged near the plate-like link table, making it compact and compact. And can be driven with small electric power.
(3) Since the power transmission coil is moved by the movement mechanism in the Y direction and the movement mechanism in the X direction, it is compact and can be moved quickly, and the movement control of the power transmission coil can be easily performed.
(4) In claim 2, the same effects as in the above (1) to (3) can be obtained, and the power transmission coil can be moved with low noise by a plurality of rollers.

Explanatory drawing of the use condition of the 1st form for implementing this invention. The disassembled perspective view of the 1st form for implementing this invention. The perspective view of the state which released | separated the case body of the 1st form for implementing this invention. The top view of the state which removed the case body of the 1st form for implementing this invention. Sectional drawing which follows the 5-5 line of FIG. Explanatory drawing which shows the movement state of the X direction of the 1st form for implementing this invention. Explanatory drawing which shows the movement state of the Y direction of the 1st form for implementing this invention. Explanatory drawing of the theoretical formula of the movement of the X direction of the 1st form for implementing this invention. Explanatory drawing for the conversion formula of the movement of the X direction of the 1st form for implementing this invention. The disassembled perspective view of the 2nd form for implementing this invention. The rear view of the link table of the 2nd form for carrying out the present invention. Explanatory drawing which shows the movement state of the X direction of the link table of the 2nd form for implementing this invention. The disassembled perspective view of the 3rd form for implementing this invention. The top view of the state which removed the case body of the 3rd form for implementing this invention. Explanatory drawing of the action | operation arm of the 3rd form for implementing this invention.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

  In the first embodiment for carrying out the present invention shown in FIG. 1 to FIG. 9, 1 is a method for charging an electronic device 2 such as a mobile phone, a camera, a PDA, or a portable electronic terminal with a built-in power receiving coil without contact. In the non-contact charger power transmission coil moving device of the present invention, the non-contact charger power transmission coil moving device 1 includes a base plate 3 and X-direction slide rails 4, 4 formed on the base plate 3. Can be slidably moved in the X direction via rollers 5, 5 and 5 that roll along, and can be detected by an X direction position detection sensor such as a magnetic sensor or an optical sensor (not shown) provided on the substrate 42. A plate-like link table 7 provided with a detection piece 6 of the X-direction sensor, and an X-direction moving mechanism attached to the base plate 3 for sliding the plate-like link table 7 in the X direction. And a Y-direction moving mechanism 10 having a Y-direction screw shaft 9 attached to the plate-like link table 7 and a forward / reverse rotation of the Y-direction moving mechanism 10 screw shaft 9 in the Y-direction. Attached to the base plate 3 so as to cover the power transmission coil support 12 provided with the power transmission coil 11 moving in the direction, the X-direction movement mechanism 8, the Y-direction movement mechanism 10, the power transmission coil 11, and the like. A case body 13 and a detection sensor 14 provided on the case body 13 that is generally used, and can detect the position of the power receiving coil of the electronic device 2 including the power receiving coil mounted on the case body 13; Then, the operation control circuit 15 that positions the power transmission coil 11 to the position detected by the detection sensor 14 by operating the moving mechanism 8 in the X direction and the moving mechanism 10 in the Y direction. In is configured.

  The moving mechanism 8 in the X direction is outside the moving range in the X direction of the link table 7, and the drive shaft 16 is positioned on the base plate 3 side in the base plate 3 in the vicinity of the portion where the link table 7 moves to the maximum. Thus, an X-axis control motor 18 using a pulse motor fixed by screws 17, 17, a pinion 19 fixed to the drive shaft 16 of the X-axis control motor 18, and a first reduction gear 20 meshing with the pinion 19 A pinion 22 attached to the attachment shaft 21 of the first reduction gear 20, a second reduction gear 23 meshing with the pinion 22, and a pinion 25 attached to the attachment shaft 24 of the second reduction gear 23. A quarter-arc arc-shaped gear 28 that is rotatably attached to a shaft 27 that meshes with the pinion 25 of the speed-reducing mechanism 26, and is integrated with the arc-shaped gear 28. A plate-shaped arm 29 having a square shape, and an engagement pin 31 provided at the front end of the link table 7 and engaged with a long hole 30 in the Y direction formed on the front side of the link table 7. And an actuating arm 32.

  The Y-direction moving mechanism 10 includes a screw shaft 9 rotatably attached to a pair of support pieces 33 formed by bending both end portions on the rear side of the link table 7, and the X axis of the screw shaft 9. A gear 34 fixed at a position opposite to the control motor 18, a pinion 35 meshing with the gear 34 is attached to the drive shaft 36, and a Y-axis control motor 37 using a pulse motor fixed to the support piece 33, It consists of

  The power transmission coil support base 12 includes a power transmission coil support base body 38 that supports the power transmission coil 11, and a meshing piece 39 that is integrally formed with the power transmission coil support base body 38 and meshes with the screw shaft 9 of the Y-direction moving mechanism 10. And a detection piece 40 of a Y-direction sensor that can be detected by a Y-direction position detection sensor such as a magnetic sensor or an optical sensor (not shown) provided on a substrate 42 provided on the power transmission coil support base body 38. .

  The operation control circuit 15 includes a board 42 provided with a control unit 41, a cable 43 connected to the board 42 and the X-axis control motor 18 of the X-direction moving mechanism 8, a cable 44 connected to the power transmission coil 11, Detection of the cable 46 and the relay board 45 connected to the relay board 45, the flexible cable 47 connected to the Y-axis control motor 37 of the moving mechanism 10 in the Y direction, the signal from the detection sensor 14, and the detection of the X direction sensor The signal of the detection piece 40 of the piece 6 and a Y direction sensor is comprised so that the said control part 41 may enter.

  The link table 7 and the power transmission coil 11 are set so as to be movable in the X and Y directions and supported by the case body 13 so as not to be detached from the slide rails 4 and 4 and the power transmission coil support 12.

  When the electronic device (not shown) to be charged is placed on the case body 13, the moving device 1 for the power transmission coil of the non-contact charger configured as described above uses the detection sensor 14 to determine the position of the power receiving coil built in the electronic device. The detected signal is input to the control unit 41 of the operation control circuit 15.

  When the detection signal of the detection sensor 14 is input to the control unit 41, the X-axis control motor 18 of the X-direction moving mechanism 8 and the Y-axis control motor 37 of the Y-direction moving mechanism 10 are driven to transmit the power transmission coil 11. Can be moved to a position where the power receiving coil can be efficiently charged.

  The power transmission coil 11 is moved to (x, y) with respect to the position coordinates (X, Y) of the power receiving coil detected by the detection sensor 14. Both the X direction and the Y direction move according to the following theoretical formula with respect to the detected position coordinates (X, Y) of the receiving coil.

As shown in FIG. 8, the movement in the X direction is 1 / n as the reduction ratio from the X-axis control motor 18 to the rotation of the operating arm 32, and 1 step angle of the X-axis control motor 18 as θ.
One step angle of the operating arm 32 P = θ / n
Driving in the X direction converts rotational motion into linear motion, and the operating arm 32 moves on the circumference of the radius L around the center D of the operating arm 32.

The position where both the X-direction sensor 6 and the Y-direction sensor 40 are turned ON is defined as the origin 0, and the joint between the operating arm 32 and the link table 7 at that time passes through the point A or the center D of the operating arm 32 and is parallel to the traveling direction. The angle between the straight line segment EE ¹ and AD is α, the point where the angle between the line segment EE ¹ and BD is 90 ° is the point B, and the point symmetric with the point A is the point C in the line segment BD. And the actuating arm 32 moves within the range of the arc AC.

Now, given the coordinates x and x ¹ , let F and G be the intersections of the line segment extending perpendicularly from EE ¹ and the radius L, and let r and δ be the angles FD and GD form EE ¹ . When the X coordinate of the power receiving coil is given, the number of input pulses of the X-axis control motor 18 can be obtained from β / P by obtaining the angle β as shown in FIG.
Here, H shown in FIG. 9 is a length that bisects the operating range AC of the operating arm 32.
H = Lcosα
And can be put.
Using this H, the condition is divided as follows in relation to the X coordinate of the power receiving coil.
(1) H> X
t = H−X J = √L ² −t ²
r = COS ⁻¹ (L ² + t ² −J ² / 2Lt)
β = r−α
(2) H = X
β = 90−α
(3) H <X
t ¹ = X ¹ −H J = √L ² −t ²
δ = COS ⁻¹ (L ² + t ² −J ² / 2Lt ¹ )
β = 180− (α + δ)
As described above, in all the conditional expressions, the number of input pulses of the X control motor 18 is β / P (Puls).
The movement in the Y direction is 1 / n as the reduction ratio until the screw shaft 9 is rotated.
If one step angle of the Y-axis control motor 37 is θ,
One step rotation angle of screw shaft 9 P = θ / n
When the pitch of the screw shaft 9 is K, the linear component in the Y direction of the power transmission coil 11 in one step of the Y-axis control motor 37 W = KP / 360
From the above, the number of input pulses of the Y-axis control motor 37 is Y / W (Puls)

[Different forms for carrying out the invention]
Next, different modes for carrying out the present invention shown in FIGS. 10 to 15 will be described. In the description of the different embodiments for carrying out the present invention, the same components as those in the first embodiment for carrying out the present invention are denoted by the same reference numerals, and redundant description is omitted.

  The second embodiment for carrying out the present invention shown in FIGS. 10 to 12 is mainly different from the first embodiment for carrying out the present invention in that the slide rails 4 and 4 are provided on the bottom surface of the link table 7. The sliding members 48, 48 slidably moving along are fixed, and the power transmission coil moving device 1 </ b> A of the non-contact charger configured in this way is the same as the first embodiment for carrying out the present invention. Effects can be obtained.

  The third embodiment for carrying out the present invention shown in FIGS. 13 to 15 is mainly different from the first embodiment for carrying out the present invention in that a gap is generated between the link table 7 and the third embodiment. In the non-contact charger configured using such an operating arm 32A, the wide arm 29A does not generate a gap so as to surely prevent the cable 44 from being tangled. Even with the power transmission coil moving device 1B, the same effects as those of the first embodiment for carrying out the present invention can be obtained, and interference between the link table 7 and the operating arm 32A can be reliably prevented. .

  In each of the embodiments of the present invention, the X-axis control motor 18 using a pulse motor and the Y-axis control motor 37 using a pulse motor have been described. However, the present invention is not limited to this, and the control Any motor that can do this can be used.

  The present invention is used in an industry for manufacturing a moving device for a power transmission coil of a non-contact charger.

1, 1A, 1B: a moving device for a power transmission coil of a non-contact charger,
3: Base plate,
4: Slide rail, 5: Roller,
6: detection piece of X direction sensor, 7: link table,
8: Movement mechanism in the X direction, 9: Screw shaft,
10: Y-direction moving mechanism, 11: Power transmission coil,
12: Power transmission coil support, 13: Case body,
14: detection sensor, 15: operation control circuit,
16: Drive shaft, 17: Screw,
18: X-axis control motor, 19: Pinion,
20: First reduction gear, 21: Mounting shaft,
22: Pinion, 23: Second reduction gear,
24: Mounting shaft, 25: Pinion,
26: Deceleration mechanism, 27: Shaft,
28: Arc gear, 29, 29A: Arm,
30: long hole, 31: engagement pin,
32, 32A: working arm, 33: support piece,
34: Gear, 35: Pinion,
36: Drive shaft, 37: Y-axis control motor,
38: Power transmission coil support base body, 39: Engagement piece,
40: detection piece of Y direction sensor, 41: control unit,
42: Board, 43: Cable,
44: Cable, 45: Relay board,
46: Cable, 47: Flexible cable,
48: Slipper material.

Claims (3)

A base plate, a plate-like link table attached to the base plate so as to be slidable in the X direction, and the link table using the drive force of the X-axis control motor via a speed reduction mechanism with a plate-like operating arm in the X direction An X-direction moving mechanism that slides and a screw shaft that is rotated by a Y-axis control motor attached to the link table so that the axis is positioned in a direction perpendicular to the X-direction moving direction of the link table. A Y-direction moving mechanism, a power-transmission-coil support provided with a power-transmission coil that moves in the Y-direction by forward / reverse rotation of the screw shaft of the Y-direction moving mechanism, the X-direction moving mechanism, A case body attached to the base plate so as to cover the moving mechanism and the power transmission coil, and a power receiving coil position of an electronic device having a power receiving coil mounted on the case body A detection sensor provided on the case body and an operation for operating the X-direction movement mechanism and the Y-direction movement mechanism for moving the power transmission coil to a position detected by the detection sensor. A device for moving a power transmission coil of a non-contact charger, comprising: a control circuit. The power transmission of the non-contact charger according to claim 1, wherein the plate-like link table is provided with a plurality of rollers that slide along a pair of X-direction guide rails formed on the base plate. Coil moving device. A plate-like operating arm of the X-direction moving mechanism is provided at a quarter-arc-shaped gear meshing with the gear of the speed reduction mechanism, a plate-shaped arm integrally formed with the gear, and a tip of the arm. 2. The device for moving a power transmission coil of a non-contact charger according to claim 1, wherein the device is formed by an engagement pin that engages with a long hole in the Y direction formed in the link table.

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