JP2006296099A - Non-contact power feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the disconnection of a non-contact power feeding device with regard to a device that feeds electric power to a display or the like in a non-contact manner. <P>SOLUTION: A flexible circuit board 21 is divided into a control circuit portion 21a and a non-control circuit one 21b. A coil holding portion 22, an ear portion 23 surrounding the coil holding portion, and a connection portion 24 that connects the coil holding portion to the control circuit portion are formed by blanking in the non-contact circuit portion of the flexible circuit board. The control circuit portion of the flexible circuit portion and the ear portion of the non-control circuit portion are secured on a support plate 20, while a core 12 is secured on the ear portion of the non-control circuit portion of the flexible circuit board. The coil holding portion is fitted into the core with the connection portion riding on the core. Then, the flexible circuit board on the support plate and the surface of the core are covered by a protection body 31. Thereby, electrical disconnection between the coil of a power feeding device or a receiving one and a control circuit portion can be prevented. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for supplying power to a display or the like in a non-contact manner.

  As shown in FIGS. 7A and 7B, a power feeder or power receiver of a conventional non-contact power feeding apparatus has a circuit board 2 on a support plate 1 and is on a non-control circuit portion of the circuit board 2. The core 3 is bonded, and the coil holding sheet 4 that holds the coil is fitted onto the core 3. The control circuit portion and the like of the circuit board 2 are covered with a protective body 5 made of a mold resin such as urethane, and further covered with a covering plate 6 to be integrated with the circuit board 2, the core 3 and the like. Such a power feeder and a power receiver are overlapped so that the cores 3 face each other, the coils on the coil holding sheet 4 face each other, and power is sent from the power feeder to the power receiver.

  As shown in FIGS. 7A and 7B, in the conventional power feeder or power receiver, the connection portion 4a for holding the lead wire of the coil extends from the coil holding sheet 4 in a strip shape, and this connection portion 4a is connected to the circuit board 2 as shown in FIG. The coil on the coil holding sheet 4 is electrically connected to the control circuit unit of the circuit board 2 by soldering to the control circuit unit. However, there is a step between the circuit board 2 and the core 3, and there is a positioning frame 7 for positioning the core 3 on the circuit board 2, so that solder for connecting the connecting portion 4 a to the circuit board 2 is present. Easy to peel off. Also, the operation of soldering the connecting portion 4a to the circuit board 2 in the vicinity of the core 3 and the positioning frame 7 is extremely troublesome because the position of the counterpart terminal is difficult to see from the operator when the terminals are overlapped with each other. .

  Accordingly, an object of the present invention is to provide means capable of solving the above problems.

  In order to solve the above-mentioned problem, in the invention according to claim 1, a single flexible circuit board is divided into a power supply control circuit part and a non-control circuit part, and the non-control circuit part of the flexible circuit board includes: Feeding control of the flexible circuit board is formed by punching a feeding coil holding part, an ear part surrounding the feeding coil holding part, and a connection part for electrically connecting the feeding coil of the feeding coil holding part to the feeding control circuit part. In a state where the circuit portion and the ear portion of the non-control circuit portion are fixed on the support plate, the power supply core is fixed on the ear portion of the non-control circuit portion of the flexible circuit board, and the connection portion is placed on the power supply core. A power feeder is employed in which the power feeding coil holding portion is fitted into the power feeding core, and the flexible circuit board on the support plate and the surface of the power feeding core are covered with a protector.

  According to a second aspect of the present invention, a single flexible circuit board is divided into a power reception control circuit part and a non-control circuit part, and a power reception coil holding part and a non-control circuit part of the flexible circuit board are provided. The ear part surrounding the power receiving coil holding part and the connection part for electrically connecting the power receiving coil of the power receiving coil holding part to the power receiving control circuit part are stamped and molded, and the power receiving control circuit part of the flexible circuit board is not controlled. The receiving part is fixed to the support plate, the receiving core is fixed to the non-control circuit part of the flexible circuit board, and the receiving coil holding part is in a state where the connecting part is placed on the receiving core. A power receiver that is fitted into the power receiving core and in which the surface of the flexible circuit board and the power receiving core on the support plate is covered with a protector is employed.

  According to a third aspect of the present invention, a single flexible circuit board is divided into a power supply control circuit part and a non-control circuit part, and the power supply coil holding part and the non-control circuit part of the flexible circuit board are provided. The ear part surrounding the power supply coil holding part and the connection part for electrically connecting the power supply coil of the power supply coil holding part to the power supply control circuit part are stamped and formed, and are not controlled with the power supply control circuit part of the flexible circuit board. The feeding part is fixed to the support plate, the feeding core is fastened to the non-control circuit part of the flexible circuit board, and the feeding coil holding part is mounted on the feeding part. A flexible circuit board on the support plate and a power feeder in which the surface of the core is covered with a protector are fitted into the power supply core, and one flexible circuit board includes a power reception control circuit unit and a non-control circuit unit. The non-control circuit part of the flexible circuit board, the power receiving coil holding part, and the power receiving core And a connection portion for electrically connecting the power receiving coil of the power receiving coil holding portion to the power receiving control circuit portion, and the power receiving control circuit portion and the non-control circuit portion of the flexible circuit board are stamped and formed. The power receiving core is fixed on the support plate, the power receiving core is fixed on the ear of the non-control circuit portion of the flexible circuit board, and the power receiving coil holding portion is placed on the power receiving core in a state where the connection portion rides on the power receiving core. A non-contact power feeding device including a power receiving device that is fitted in a flexible circuit board on the support plate and the surface of the power receiving core is covered with a protective body is employed.

  According to a fourth aspect of the present invention, in the power feeder, the power receiver or the non-contact power feeding device according to any one of the first to third aspects, the side opposite to the support plate of the power feeder or the power receiver is covered with a covering plate. A power supply, a power receiver, or a non-contact power supply device protected from cracks is used.

  According to a fifth aspect of the present invention, in the power feeder, the power receiver or the non-contact power feeding device according to any one of the first to fourth aspects, the power feeding core or the power receiving core is a non-control circuit having a flexible circuit board. A power feeder, a power receiver, or a non-contact power feeding device fixed on the ear portion of the unit via a plate-like spacer is employed.

  The invention according to claim 6 is the power feeder, the power receiver or the non-contact power feeding device according to any one of claims 1 to 5, wherein the power feeding core or the power receiving core is positioned by a positioning frame, A power receiver or a non-contact power feeding device is adopted.

  Further, the invention according to claim 7 is the power feeder, the power receiver or the non-contact power feeding device according to any one of claims 1 to 6, wherein the end of the broken line generated by the punching molding of the connecting portion or the like is provided. A power feeder, a power receiver or a non-contact power feeding device with a small hole is employed.

  According to an eighth aspect of the present invention, in the power feeder, the power receiver or the non-contact power feeding device according to any one of the first to seventh aspects, the projecting piece is fed when the feeding coil holding portion is stamped and formed. A power feeder, a power receiver, or a non-contact power feeding device formed integrally with the coil holding unit is employed.

  According to the present invention, a single flexible circuit board is divided into a control circuit part and a non-control circuit part, and the non-control circuit part of the flexible circuit board surrounds the coil holding part and the coil holding part. The ear part and the connecting part for connecting the coil holding part to the control circuit part are stamped and molded, and the control circuit part of the flexible circuit board and the ear part of the non-control circuit part are fixed on the support plate to be flexible. The core is fixed on the ear of the non-control circuit portion of the circuit board, the coil holding portion is fitted into the core with the connection portion riding on the core, and the surface of the flexible circuit board and the core on the support plate Since it is covered with a protective body, the connection part is on the same circuit board as the coil holding part, and the coil on the coil holding part is electrically connected to the control circuit part of the circuit board without soldering. . Therefore, electrical disconnection between the coil and the control circuit unit is prevented, and electrical connection work is not required.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, this non-contact power feeding device is used for power feeding to a flat display 8, for example.

  The flat display 8 is specifically an organic EL (electroluminescence) display device, and is formed into a sheet shape having a size of about 30 cm × 20 cm and a thickness of about 2 mm, for example.

  The non-contact power feeding device of the flat display 8 is configured to supply power from the power feeder 9 to the power receiver 10 in a non-contact manner. For example, the power feeder 9 is attached to a wall (not shown) to which the flat display 8 is attached. The power receiver 10 is attached to the back surface of the flat display 8.

  As shown in FIG. 1, the power feeder 9 includes a power feeding coil 11, a power feeding core 12, a power feeding unit 13 that receives power from an external power supply unit 16 and sends the power to the power feeding coil 11, and the power feeding core 12 receives power from the power receiver 10. And a detection unit 15 that detects that the core 17 is directly opposed.

  The external power supply unit 16 is provided at a location that is not visible to the human eye, such as behind a wall surface to which the flat display 8 is attached, and is electrically connected to the power supply unit 13 of the power supply 9 by a lead wire.

  As shown in FIG. 1, the power receiver 10 includes a power receiving coil 14 and a power receiving core 17 that form an electromagnetic induction circuit by facing directly at a position close to the power feeding coil 11 and the power feeding core 12, and the power receiving coil 14. A power receiving unit 18 that receives power and processes current and voltage, and a driving unit 19 that receives a signal from the power receiving unit 18 and outputs a driving signal to the flat display 8 are provided.

  As shown in FIGS. 2A and 2B, the power feeder 9 includes a thin support plate 20 having relatively rigidity, and a flexible circuit board (FPC) 21 is placed on the support plate 20. The support plate 20 is formed of FRP such as epoxy resin containing glass fiber, but may be formed of other metal having good thermal conductivity such as aluminum. The flexible circuit board 21 is formed in a slightly smaller area than the support plate 20 and is disposed slightly inward from the outer periphery of the support plate 20.

  As shown in FIG. 5, the flexible circuit board 21 is divided into a power feeding control circuit unit 21a and a non-control circuit unit 21b. The power supply control circuit unit 21a includes the power supply unit 13, the detection unit 15, and the like illustrated in FIG. The non-control circuit part 21a is stamped and formed with a feeding coil holding part 22, an ear part 23 surrounding the feeding coil holding part 22, and a connection part 24 connecting the feeding coil holding part 22 to the feeding control circuit part 21a. . Reference numeral 25 denotes a cut line formed by this punching. At the end of the cut line 25, a circular small hole 25a is formed so that the flexible circuit board 21 does not crack. In addition, the feeding coil holding portion 22 is integrally formed with a projecting piece 22a at the time of punching.

  The power supply coil 11 is formed on the power supply coil holding part 22, and two conductors extending from the power supply coil 11 toward the power supply control circuit part 21 a are formed on the connection part 24. A lead wire 26 is drawn out of the power feeder 9 from the power supply control circuit unit 21a.

  As shown in FIGS. 2B and 3, the flexible circuit board 21 is placed on the support plate 20, and the feeding control circuit portion 21 a and the ear portion 23 of the non-control circuit portion 21 b are on the support plate 20. It is fixed with a double-sided adhesive tape or the like (not shown). At that time, the feeding coil holding part 22 and the connecting part 24 are released from the support plate 20.

  As shown in FIGS. 2B and 3, the power feeding core 12 is fixed on the ear portion 23 of the non-control circuit portion 21 b of the flexible circuit board 21. As shown in FIGS. 3 and 4, the power supply core 12 is formed in a plate shape that can ride on the non-control circuit portion 21 b of the flexible circuit board 21, and an annular surface on which the power supply coil holding portion 22 is fitted. A groove 12a, a belt-like groove 12b into which the connecting portion 24 is fitted, and a concave groove 12c into which the protruding piece 22a is fitted are formed.

  The power feeding core 12 can be directly fixed on the ear portion 23 of the non-control circuit portion 21b of the flexible circuit board 21. However, as shown in FIG. It is fixed via the spacer 28. The spacer 28 is formed of, for example, FRP such as epoxy resin containing glass fiber. The spacer 28 is fixed on the ear 23 of the flexible circuit board 21 with a double-sided adhesive tape or the like (not shown), and the power supply core 12 is fixed on the spacer 28 with a double-sided adhesive tape or the like (not shown). A plurality of spacers 28 are overlaid as necessary. The height position of the power feeding core 12 is adjusted by the spacer 28, and thereby the distance from the power feeding coil 11 to the surface of a cover plate 29 described later is adjusted.

  As shown in FIGS. 2 and 3, the power feeding core 12 is positioned on the spacer 28 by the positioning frame 30. The positioning frame 30 has a shape along the contour of the spacer 28 and is fixed on the spacer 28 with a double-sided adhesive tape or the like (not shown).

  The feeding coil holding part 22 and the connecting part 24 are lifted above the flexible circuit board 21 as shown in FIG. 3 before the feeding core 12 and the like are attached to the ear part 23. As shown in FIGS. 2A and 2B, the power feeding coil holding portion 22 is fitted into the annular groove 12a of the power feeding core 12, and is fixed to the groove bottom with a double-sided adhesive tape or the like (not shown). At the same time, the connecting portion 24 rides on the power feeding core 12 and is fitted into the belt-like groove 12b. Since the feeding coil holding part 22 is integrally connected to the flexible circuit board 21 via the connection part 24, the feeding coil holding part 22 is attached to the feeding core 12 simply and accurately. Further, there is a step between the flexible circuit board 21 and the power supply core 12, and there is a positioning frame 30 for positioning the power supply core 12 on the flexible circuit board 21, so that the connecting portion 24 is bent. However, since the feeding coil holding part 22 is integrally connected to the flexible circuit board 21 via the connection part 24, no disconnection occurs between the feeding coil 11 and the feeding control circuit part 21a.

  Further, the projecting piece 22a is fitted into the concave groove 12c of the power supply core 12, and thereby the positioning of the coil on the power supply coil holding portion 22 with respect to the power supply core 12 is performed more accurately. Further, since the feeding piece holding part 22 can be pushed into the annular groove 12a of the feeding core 12 by pinching the protruding piece 22a with a finger, the feeding coil holding part 22 can be smoothly stuck to the groove bottom.

  As shown in FIGS. 2A and 2B, a cover plate 29 having the same shape and size as the support plate 20 is applied from above the power supply core 12. The protective body 31 is formed by molding urethane resin between the upper and lower support plates 29 and 21. By filling the protector 31 between the support plates 29 and 21, the upper and lower support plates 29 and 21 are coupled to each other, the power supply coil 11, the power supply core 12, the power supply control circuit unit 21a between the support plates 29 and 21, and the like. Is protected. In the power feeder 9 configured as described above, the distance from the power supply coil 11 to the surface of the support plate 29 is, for example, about 1 mm. The upper cover plate 29 functions as a protector, and when the protector 31 covers the surface of the power feeding core 12 and the like, the cover plate 29 can be omitted.

  As shown in FIG. 6, the power receiver 10 is superposed on the power feeder 9 so that the power receiving core 17 and the power feeding core 12 face each other as shown in FIG. 6. The power receiver 10 is provided with a holding portion of a power receiving coil 14 and a power receiving core 17 having the same configuration as that of the power feeder 9. A power reception control circuit unit 21c is provided on the flexible circuit board. In addition, since the power receiver 10 has substantially the same configuration as that of the power feeder 9, the same components as those of the power feeder 9 are denoted by the same reference numerals in the respective components of the power receiver 10, and detailed descriptions thereof are as follows. Omitted. Due to the superposition of the power feeder 9 and the power receiver 10, the distance between the power receiving core 17 and the power feeding core 12 is, for example, about 2 mm. As described above, the power receiving core 17 and the power feeding core 12 face each other close to each other, so that the power feeding efficiency is improved.

  Next, the operation of the non-contact power feeding apparatus having the above configuration will be described.

  As shown in FIGS. 1 and 6, the power feeder 9 and the power receiver 10 are overlapped so that the power receiving core 17 of the power receiver 10 faces the power feeding core 12 of the power feeder 9 during power feeding.

  As shown in FIG. 1, the power supply unit 16 converts an alternating current into a power supply current of DC 12 volts, for example, and outputs the power supply signal to the power supply unit 13.

  On the other hand, the detection unit 15 detects whether or not the power feeding core 12 and the power receiving core 17 are facing each other in parallel, generates a detection signal indicating that the power feeding core 12 and the power receiving core 17 are facing each other, and outputs the detection signal to the power feeding unit 13.

  The power supply unit 13 converts the power supply signal into a pulsed power supply signal having a preset frequency, and the power supply coil 11 receives the power supply signal only when it is confirmed that the detection signal is output from the detection unit 15. To supply.

  The power receiving coil 14 is fixed to the power receiving core 17, the power feeding coil 11 is fixed to the power feeding core 12, and when the cores 17, 12 come close to each other and face each other in parallel, the power feeding coil 11 and the power receiving coil 14 An electromagnetic induction circuit is formed between them.

  When the power feeding signal is supplied to the power feeding coil 11 in this state, an induced electromotive force corresponding to the magnitude is generated in the power receiving coil 14, and the power receiving signal is output from the power receiving coil 14 to the power receiving unit 18. The

  The power reception unit 18 to which the power reception signal is input processes the current and voltage in the power reception signal and outputs the processed power and voltage to the drive unit 19 as a power source.

  As a result, power is output to the drive unit 19 to generate a drive signal for driving the flat display 8, and this is output to the flat display 8 to perform a desired display on the screen of the flat display 8.

  In addition, although the example which applied this non-contact electric power feeder to the flat display was shown in the said embodiment, it can also be used for the electric power feeding of another display apparatus. Further, the non-contact power feeding device is not limited to a display, and can be applied to power feeding other devices such as vehicles and electric lights.

It is a block diagram of a non-contact electric power feeder. A power supply is shown, (A) is a top view of a power supply, (B) is a BB arrow directional cross-sectional view in (A). It is an exploded sectional view of a feeder. It is a top view of a feeding core. It is a top view of a flexible circuit board. It is a longitudinal cross-sectional view of a state where a power receiver is superimposed on a power feeder. The conventional feeder is shown, (A) is a top view of a feeder, (B) is a BB arrow directional cross-sectional view in (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 ... Power feeder 10 ... Power receiver 20 ... Support plate 21 ... Flexible circuit board 21a ... Power feeding control circuit part 21b ... Non-control circuit part 22 ... Power feeding coil holding part 23 ... Ear part 24 ... Connection part 31 ... Protector

Claims (8)

  One flexible circuit board is divided into a power supply control circuit part and a non-control circuit part, and a non-control circuit part of the flexible circuit board includes a power supply coil holding part and an ear part surrounding the power supply coil holding part. A connecting portion for electrically connecting the feeding coil of the feeding coil holding portion to the feeding control circuit portion is stamped and molded, and the feeding control circuit portion of the flexible circuit board and the ear portion of the non-control circuit portion are on the support plate The power supply core is fixed onto the ear of the non-control circuit portion of the flexible circuit board, and the power supply coil holding portion is fitted into the power supply core with the connection portion riding on the power supply core. A power feeder characterized in that the surface of a flexible circuit board and a power feeding core is covered with a protective body.   One flexible circuit board is divided into a power receiving control circuit part and a non-control circuit part, and the non-control circuit part of the flexible circuit board includes a power receiving coil holding part, and an ear part surrounding the power receiving coil holding part. The connection portion for electrically connecting the power receiving coil of the power receiving coil holding portion to the power receiving control circuit portion is stamped and molded, and the power receiving control circuit portion of the flexible circuit board and the ear portion of the non-control circuit portion are on the support plate. The power receiving core is fixed onto the ear of the non-control circuit portion of the flexible circuit board, and the power receiving coil holding portion is fitted into the power receiving core with the connection portion riding on the power receiving core. A power receiver characterized in that a surface of a flexible circuit board and a power receiving core is covered with a protective body.   One flexible circuit board is divided into a power supply control circuit part and a non-control circuit part, and a non-control circuit part of the flexible circuit board includes a power supply coil holding part and an ear part surrounding the power supply coil holding part. A connecting portion for electrically connecting the feeding coil of the feeding coil holding portion to the feeding control circuit portion is stamped and molded, and the feeding control circuit portion of the flexible circuit board and the ear portion of the non-control circuit portion are on the support plate The power supply core is fixed onto the ear of the non-control circuit portion of the flexible circuit board, and the power supply coil holding portion is fitted into the power supply core with the connection portion riding on the power supply core. A flexible circuit board and a power feeder in which the surface of the power feeding core is covered with a protective body are provided, and one flexible circuit board is divided into a power reception control circuit unit and a non-control circuit unit, and the flexible circuit In the non-control circuit part of the substrate, the receiving coil holding part, and the ear part surrounding the receiving coil holding part, The connecting portion for electrically connecting the receiving coil of the electric coil holding portion to the receiving control circuit portion is stamped and formed, and the receiving control circuit portion of the flexible circuit board and the ear portion of the non-control circuit portion are on the support plate. The power receiving core is firmly fixed on the ear of the non-control circuit portion of the flexible circuit board, and the power receiving coil holding portion is fitted into the core with the connection portion riding on the power receiving core. A non-contact power feeding apparatus comprising a power receiver having a surface of a conductive circuit board and a power receiving core covered with a protective body.   The power feeder, power receiver or non-contact power feeding device according to any one of claims 1 to 3, wherein a side opposite to the support plate of the power feeder or the power receiver is covered and protected by a covering plate. Electric appliance, power receiver or non-contact power supply device.   5. The power feeder, power receiver or non-contact power feeding device according to claim 1, wherein the power feeding core or the power receiving core is a plate-like spacer on the ear portion of the non-control circuit portion of the flexible circuit board. A power feeder, a power receiver, or a non-contact power feeding device characterized by being fixed via a wire.   The power feeder, power receiver or non-contact power feeding device according to any one of claims 1 to 5, wherein the power feeding core or power receiving core is positioned by a positioning frame. Power supply device.   The power feeder, power receiver or non-contact power feeding device according to any one of claims 1 to 6, wherein a small hole is formed at an end of a broken line generated by punching of the connecting portion or the like. A power feeder, a power receiver, or a non-contact power feeding device.   The power feeding device, power receiving device, or non-contact power feeding device according to any one of claims 1 to 7, wherein the projecting piece is formed integrally with the power feeding coil holding portion when the feeding coil holding portion is stamped and formed. A power feeder, a power receiver, or a non-contact power feeding device.

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