JP3697789B2 - Non-contact power supply - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-contact power supply device used for portable communication equipment or electronic equipment.
[0002]
[Prior art]
Such a conventional non-contact type power supply device is configured as shown in FIG. That is, the fitting portion 2 is provided at the peripheral edge portion made of synthetic resin, the boss portion 3 protruding downward is provided at the lower surface middle portion, and the upper case 1 provided with the hollow protrusion portion 4 protruding upward at the central portion is provided in the center. A primary coil 8 formed by winding a primary winding 7 around a bobbin 6 incorporating a magnetic core 5 projecting upward in the part is mounted on the upper surface so as to constitute an electric circuit part together with other electronic components 9. The printed circuit board 10 is coupled to the boss 3 of the upper case 1 using the mounting screw 11, the magnetic core 5 is fitted into the hollow protrusion 4, and the upper case 1 is fitted into the fitting portion 2 rising upward at the peripheral edge. The lower case 13 having the fitting protrusion 12 to be joined is combined to form one power supply unit, which is also made of synthetic resin or the like, and serves as an electronic device such as a communication device or a video camera. Hollow on the end face of the equipment case 14 with built-in parts The projection 15 inward is provided for, to form a power receiving portion constitutes a secondary coil 17 wound around the secondary winding 16 to the outer periphery of the projection 15.
[0003]
That is, when charging the battery in the device case 14 with such a configuration, the power receiving unit is set in the power supply unit. That is, the combination is made so that the protrusion 15 of the device case 14 fits into the hollow protrusion 4 at the center of the upper case 1, and power is applied to the primary coil 8 and magnetically coupled via the magnetic core 2 2. Electric power is induced in the secondary coil 17, and the electric power generated in the secondary coil 17 is charged to the battery in the device case 14.
[0004]
[Problems to be solved by the invention]
In the above configuration, the coupling between the primary side coil 8 and the secondary side coil 17 greatly affects the output capacity and efficiency. Conventionally, in order to eliminate and stabilize the magnetic coupling between the primary side coil 8 and the secondary side coil 17, the distance between the primary winding 7 and the secondary winding 16 and the positional deviation of each center are set to 1. In the process of mounting the secondary coil 8 on the printed circuit board 10, the variation of the primary coil 8 is managed based on the floating standard between the primary coil 8 and the printed circuit board 10.
[0005]
That is, what was mounted on the printed circuit board 10 by soldering the primary coil 8 is fixed to the boss portion 3 of the upper case 1 using the mounting screw 11 to regulate the position of the primary coil 8. .
[0006]
However, the position of the primary coil 8 is uneven in the height of the boss 3 of the upper case 1, the hole position of the printed board 10 is shifted, the mounting position of the printed board 10 and the primary coil 8 is shifted, and the primary side. When the printed circuit board 10 on which the coil 8 is mounted is assembled to the upper case 1, the positional deviation with the secondary coil 17 on the device case 14 side is caused by the positional deviation or the like, so that the magnetic coupling greatly varies, and the output capacity and efficiency are large. It had an adverse effect.
[0007]
It is an object of the present invention to provide a non-contact type power supply apparatus that eliminates the above-described conventional drawbacks, is less likely to cause a positional shift between the primary side coil and the secondary side coil, and has stable magnetic coupling. It is what.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a non-contact power supply device of the present invention houses a printed circuit board in which a primary coil that constitutes an electric circuit together with various electronic components is housed in a case. A power supply unit that mechanically positions and couples the coil, and a power receiving unit that incorporates a secondary coil in a device case that incorporates electrical circuits and mechanical components that constitute communication equipment and electronic equipment. As a mechanical coupling of the primary coil to the case, a bobbin mounting portion of the primary coil is coupled to the boss portion provided on the case together with the printed circuit board by a mounting screw. The receiving portion is configured to fit together so that the primary side coil and the secondary side coil correspond to each other without being displaced.
[0009]
With this configuration, it is possible to provide a non-contact power supply device with excellent output capacity and efficiency.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, a printed circuit board in which a primary coil that constitutes an electrical circuit together with various electronic components is housed in a case, and the case and the primary coil are mechanically connected. A power supply unit that is positioned and coupled to the power supply unit, and a power receiving unit that incorporates a secondary coil in a device case that incorporates electrical circuits and mechanical components that constitute communication equipment and electronic equipment . As a mechanical coupling of the primary coil, a bobbin mounting portion of the primary coil is coupled to the boss portion provided in the case together with the printed circuit board by a mounting screw, and the power supply unit and the power receiving unit are connected to each other. The primary side coil and the secondary side coil are configured to fit together so as not to be displaced. With this configuration, the case and the equipment case are fitted together, thereby the primary side coil. If response without the position of the secondary coil is shifted, the magnetic coupling can be made small variations in the stable output capacity and efficiency.
[0013]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIG.
[0014]
In FIG. 1, the upper case 20 and the lower case 21 made of a synthetic resin having elasticity constitute a case of the power supply unit. The upper case 20 has an inverted U-shaped fitting portion 22 rising upward at the peripheral portion, a boss portion 23 protruding downward in the middle portion, and a hollow protrusion rising upward in the central portion. The configuration has a portion 24. Further, the lower case 21 has a dish shape having a fitting peripheral wall 25 fitted and connected to the fitting portion 22 of the upper case 20 at the peripheral portion.
[0015]
In the upper and lower cases 20 and 21, a printed circuit board 28 in which an electric circuit as a power supply unit is formed by mounting a primary coil 26 and various electronic components 27 is incorporated. The primary coil 26 is provided with terminals 31 for mounting on the printed circuit board 28 on the lower surface of the coil bobbin 30 around which the primary winding 29 is wound, and mounting portions 32 are provided at both ends of the lower end flange of the coil bobbin 30; In addition, a magnetic core 33 made of an I-shaped core is incorporated in the central portion of the coil bobbin 30 so as to protrude upward.
[0016]
The printed circuit board 28 including the primary coil 26 is coupled to the boss portion 23 of the upper case 20 using the mounting screw 34. That is, the mounting screw 34 is inserted into the printed board 28 and the mounting portion 32 of the coil bobbin 30 of the primary coil 26 and is screwed to the boss portion 23 of the upper case 20 to be coupled. That is, the attachment portion 32 of the coil bobbin 30 of the primary side coil 26 comes into contact with the lower surface of the boss portion 23 of the upper case 20 to be positioned and fixed. At this time, the upper portion of the magnetic core 33 of the primary coil 26 is fitted in the hollow protrusion 24 of the upper case 20.
[0017]
On the other hand, 35 is a device case made of a synthetic resin and the like, and although not shown in the drawing, an electrical circuit and components constituting a communication device or an electronic device are incorporated therein. One end portion is formed to have an outer dimension that fits inside the fitting portion 22 of the upper case 20. One end of the device case 35 is provided with a hollow recess 36 projecting inwardly into which the hollow protrusion 24 of the upper case 20 is fitted, and a height position is determined on the outer peripheral surface of the hollow recess 36 via a spacer 37. A secondary coil 39 formed by winding the secondary winding 38 is provided to constitute a power receiving unit.
[0018]
The operation of the above configuration will be described. When the charging energy of the battery in the device case 35 decreases, the device case 35 is fitted into the fitting portion 22 of the upper case 20 of the power supply unit. Then, by supplying power to the power supply unit, power is applied to the primary side coil 26 to induce power in the secondary side coil 39 that is magnetically coupled via the magnetic core 33, and the secondary side coil 39 generates power. The battery in the device case 35 is charged with the electric power.
[0019]
At this time, if the outer dimensions of the upper case 20 and the device case 35 are formed as specified, the primary side coil 26 is directly attached to the boss portion 23 of the upper case 20, and the secondary side coil 39 is a spacer. 37 is positioned at the hollow recess 36 with high dimensional accuracy and is attached to the equipment case 35, so that there is no displacement between the primary side coil 26 and the secondary side coil 39 and there is no variation in magnetic coupling. The output capacity and efficiency are not adversely affected, and a very high quality and stable non-contact power supply device can be obtained.
[0020]
(Embodiment 2)
The second embodiment of the present invention will be described below with reference to FIG.
[0021]
In addition, the same code | symbol is attached | subjected to the part of the same structure as Embodiment 1, and description is abbreviate | omitted and only a different point is demonstrated.
[0022]
In FIG. 2, an engaging protrusion 40 that protrudes downward is provided in the middle of the upper case 20 in place of the boss 23, and the coil bobbin 30 of the primary side coil 26 is engaged with the lower end of the engaging protrusion 40. After the primary coil 26 is mounted on the printed circuit board 28, the coil bobbin 30 is engaged with and fixed to the engaging protrusion 40 of the upper case 20, The lower case 21 is fitted to form a power supply unit.
[0023]
With such a configuration, the operation is basically the same as that of the first embodiment, but it has another effect that the primary coil 26 mounted on the printed circuit board 28 with respect to the upper case 20 can be easily and reliably incorporated. Obtainable.
[0024]
(Embodiment 3)
The third embodiment of the present invention will be described below with reference to FIG.
[0025]
The basic configuration is the same as that of the second embodiment, and only different points will be described.
That is, the primary side coil 26 is dimensioned so that the magnetic core 33 does not protrude upward and is accommodated in the coil bobbin 30, and this is formed in the engagement protrusion 41 of the upper case 20 and the engagement claw 41 and the engagement recess 42 of the coil bobbin 30. Are engaged by engaging. Therefore, the upper case 20 does not have to be provided with the hollow protrusion 24 at the center.
[0026]
On the other hand, the hollow recess 36 is not required on the device case 35 side, and the secondary coil 39 is attached in close contact with the end surface of the device case 35. The secondary coil 39 is attached to a coil bobbin 44 incorporating a magnetic core 43 in the center. The secondary winding 38 is wound.
[0027]
With this configuration, by fitting the device case 35 into the recess on the upper surface of the upper case 20, the primary side coil 26 and the secondary side coil 39 are arranged in close proximity to each other and magnetically interposed via the magnetic cores 33 and 43. Combined, it can receive power.
[0028]
This simplifies the shapes of the upper case 20 and the device case 35 and can be produced at low cost.
[0029]
【The invention's effect】
As described above, since the non-contact type power supply device of the present invention is configured, the primary side coil and the secondary side coil are positioned and coupled with respect to the case and the device case. Sometimes the magnetic coupling between the two coils is remarkably stable, and the output capacity and efficiency can be stabilized.
[Brief description of the drawings]
FIG. 1 is an exploded cross-sectional view of a main part showing a non-contact power supply apparatus according to Embodiment 1 of the present invention. FIG. 2 is an exploded cross-sectional view of a main part of Embodiment 2. FIG. Partial exploded sectional view [Fig. 4] An exploded sectional view of the main part showing a conventional non-contact power supply device [Explanation of symbols]
20 Upper case 21 Lower case 22 Fitting portion 23 Boss portion 24 Hollow protrusion 25 Fitting peripheral wall 26 Primary coil 27 Electronic component 28 Printed circuit board 29 Primary winding 30 Coil bobbin 31 Terminal 32 Mounting portion 33 Magnetic core 34 Mounting screw 35 Device case 36 Hollow recess 37 Spacer 38 Secondary winding 39 Secondary coil 40 Engagement protrusion 41 Engagement claw 42 Engagement recess 43 Magnetic core 44 Coil bobbin

Claims (1)

A power supply unit in which a printed circuit board in which a primary side coil that constitutes an electrical circuit together with various electronic components is incorporated in a case is stored, and the case and the primary side coil are mechanically positioned and coupled, and communication And a power receiving part in which a secondary coil is incorporated in an equipment case in which an electrical circuit and a mechanical component constituting the equipment and the electronic equipment are incorporated, and the case as a mechanical coupling of the primary coil to the case The bobbin mounting portion of the primary coil is coupled with the printed circuit board to the boss portion provided with the mounting board, and the power supply portion and the power receiving portion are misaligned between the primary coil and the secondary coil. A non-contact type power supply device that fits together without having to respond.

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