JPH1197262A - Non-contact plug socket, non-contact plug, and non-contact power transmitter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of conduction noise and to eliminate the possibility of electrical shocks. SOLUTION: A non-contact plug socket 10 incorporates a power transmitting section 30 which transmits electric power to a non-contact plug 20 inserted into the openings 10a of the socket 10 in a non-contact state. The section 30 contains a primary coil 31. On the other hand, the plug 20 incorporates a power receiving section 40, which receives electric power transmitted from the section 30 in a non-contact state. The section 40 contains a secondary coil 41. The electric power is transmitted to the power-receiving section 40 from the power transmitting section 30, by utilizing effect of electromagnetic induction caused between the coils 31 and 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outlet, a plug inserted therein, and a power transmission device.

[0002]

2. Description of the Related Art As is well known, an "outlet" is one type of electric wiring equipment, is provided on a wall or the like, and is a plug insertion port for connecting a cord of an electric equipment to wiring. . On the other hand, a “plug” refers to a plug-in device attached to the end of a cord for connecting to a wiring. Here, the “wiring” refers to an electric wire laid on the power consumer side, and is usually supplied with electric power having an effective voltage of 100 V and a commercial frequency of 50 Hz or 60 Hz.

[0003] The outlet has a pair of grooves and a receiving blade provided at the position of the grooves. On the other hand, the plug has a pair of insert blades (blades) that can be inserted into a pair of grooves of the outlet and are in electrical contact with the receiving blade.

[0004]

As described above, conventional outlets and plugs have receiving blades and insert blades.
In use, the receiving blade and the insert blade need to be in electrical contact. That is, the conventional outlet and plug are of a contact type.

As is well known, various noises (harmonics, lightning surge, high frequency, etc.) are mixed (superimposed) in the AC power supply of the wiring. Induced noise such as lightning can be prevented to some extent by an insulation transformer or lightning arrester, but still not all noise can be completely eliminated. Here, the remaining noise that cannot be removed is referred to as “conduction noise”.

Conventional outlets and plugs are of the contact type, so that conducted noise is transmitted from the plug to an electric device or an electronic device (hereinafter collectively referred to as a device) via a cord, and the device may malfunction. Even if the equipment malfunctions,
If there is a person near the device, the device can be restored immediately, and there is no problem.

However, such a device may be installed in an unoccupied region such as a polar instrument. In such a case, once the polar instrument malfunctions due to the influence of the noise, it takes a very long time to recover the malfunction. This is because in order to recover a malfunctioning polar instrument, the repairman must go to the pole where it is installed.

Further, in the conventional contact-type outlet and the contact-type plug, since the electric contact terminals such as the receiving blade and the insert blade are exposed to the outside, the contact-type outlet uses water for fear of electric shock. It is avoided to install it near a place (for example, kitchen, bathroom, poolside, etc.) (hereinafter, referred to as around water). That is, it has been difficult to use an electric appliance around water with a conventional contact outlet or contact plug.

Therefore, an object of the present invention is to provide an outlet, a plug, and a power transmission device that can prevent conducted noise.

Another object of the present invention is to provide an outlet, a plug, and a power transmission device which are free from electric shock.

[0011]

The inventor of the present invention has made intensive studies on how to prevent induced noise and eliminate the risk of electric shock. As a result, the inventor has noticed that it is only necessary to be able to transmit electric power from the outlet to the plug in a non-contact manner. On the other hand, the present applicant has already proposed a "cordless power station" for transmitting electric power in a non-contact manner (see, for example, JP-A-231586). In this cordless power station,
Electric power is transmitted from the power transmission side to the power reception side in a non-contact manner using electromagnetic induction.

The present inventor has thought that this cordless power station can be applied to transmit electric power from an outlet to a plug in a contactless manner. In other words, if the outlet is provided with a device corresponding to the power transmission side of the cordless power station, and the plug is provided with a device corresponding to the power receiving side of the cordless power station, it is possible to prevent conduction noise and eliminate the risk of electric shock.

[0013] That is, according to the present invention, there is provided a non-contact outlet characterized by incorporating a power transmission means for transmitting electric power to a plug-in non-contact plug in a non-contact manner.

According to the present invention, there is provided a non-contact type plug used together with the non-contact type outlet, wherein the non-contact type plug has a built-in power receiving means for receiving power transmitted from the power transmitting means in a non-contact manner. A contact plug is obtained.

Further, according to the present invention, a non-contact outlet having a built-in power transmitting means for transmitting electric power in a non-contact manner, and an electric power which is inserted into the non-contact outlet and transmitted from the power transmitting means in a non-contact manner. A non-contact type power transmission device characterized by having a non-contact type plug having a built-in power receiving means for receiving power.

[0016]

The electric power is transmitted from the non-contact type outlet to the non-contact type plug in a non-contact manner, so that it is possible to prevent conduction noise and eliminate the possibility of electric shock.

[0017]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a non-contact power transmission device according to an embodiment of the present invention. The non-contact power transmission device includes a non-contact outlet 10 and a non-contact plug 20.
In FIG. 1, (a) is a diagram showing a schematic appearance of a non-contact type outlet 10 and a non-contact type plug 20,
(B) connects the non-contact plug 20 to the non-contact outlet 10.
It is sectional drawing which shows the state at the time of inserting in.

The non-contact outlet 10 has an opening 10a into which the non-contact plug 20 is inserted. The non-contact outlet 10 has a built-in power transmission unit 30 for transmitting electric power to the non-contact plug 20 inserted into the opening 10a in a non-contact manner. The power transmission unit 30 includes a primary coil 31. On the other hand, the non-contact plug 20 has a built-in power receiving unit 40 that receives power transmitted from the power transmitting unit 30 in a non-contact manner. Power receiving unit 40 includes a secondary coil 41. These coils 31,
The power is transmitted from the power transmitting unit 30 to the power receiving unit 40 in a non-contact manner by utilizing the electromagnetic induction effect generated between the power transmitting units 41. When the non-contact plug 20 is inserted into the opening 10a of the non-contact outlet 10, the distance between the primary coil 31 and the secondary coil 41 is preferably in the range of about 0.5 mm to 10 mm.

FIG. 2 shows a circuit configuration of a power transmitting unit 30 built in the non-contact type outlet 10 and a power receiving unit 40 built in the non-contact type plug 20.

The power transmission unit 30 has a commercial frequency of 50 Hz or 60 Hz and an effective voltage of 1
An AC voltage of 00V is supplied.

The power transmission section 30 has the primary coil 31 and a resonance capacitor 32 connected in parallel to the primary coil 31. The primary coil 31 and the resonance capacitor 32
Constitute a parallel resonance circuit. Power transmission unit 30
Has an AC / DC converter 34 and a DC / AC converter 34. This AC / DC converter 3
4 and the DC / AC converter 34 convert the power supply power of the commercial frequency into converted power of a predetermined frequency equal to the resonance frequency of the parallel resonance circuit. The parallel resonance circuit functions as a transmitting means for transmitting the converted power to the outside.

The power receiving section 40 has the secondary coil 41 and a resonance capacitor 42 connected in parallel to the secondary coil 41.
Constitute a parallel resonance circuit. The resonance frequency of this parallel resonance circuit is set to be equal to the resonance frequency of the parallel resonance circuit of power transmission unit 30. Power receiving unit 40
Further includes a rectifier circuit including a rectifier diode 43 and a smoothing capacitor 44. That is, the power receiving unit 5
The zero parallel resonance circuit functions as a receiving unit that receives the power from the transmitting unit of the power transmitting unit 40, and the rectifying circuit of the power receiving unit 50 converts the output of the receiving unit into DC power.

FIG. 3 shows a coil device 50 used as the primary coil 31 or the secondary coil 41. The coil device 50 includes a flat soft magnetic material 51 and the soft magnetic material 5.
And two spiral coils 52 and 53 provided on the first coil. The two spiral coils 52 and 53 are connected in series such that the directions of magnetic flux at a certain moment are opposite to each other.

In the non-contact power transmission device having such a configuration, power is transmitted from the non-contact outlet 10 to the non-contact plug 20 in a non-contact manner. Therefore, it is possible to prevent conduction noise mixed in the AC power supply. In addition, since the fear of electric shock can be eliminated, the non-contact outlet 10 can be installed around the water, and the electric appliance can be used around the water. Furthermore, since it has a structure effective for preventing an electric shock accident, it is safe to install the non-contact type outlet 10 in a show room, a children's room or the like.

The non-contact outlet 10 shown in FIG.
In the structure of the power transmission unit 30 built in the
Then, the exciting current always flows and power is consumed. Regarding this, the following usage method can be considered. For example, for the purpose of preventing conducted noise, there is no problem since it is assumed that the non-contact plug 20 is always inserted into the non-contact outlet 10.

On the other hand, for safety purposes, the non-contact plug 2
Only when 0 is plugged into the contactless outlet 10,
The configuration may be such that AC power is supplied to the non-contact outlet 10. For example, a structure may be adopted in which a power switch is attached to the non-contact outlet 10 and the power switch is turned on only when the non-contact plug 20 is securely inserted into the non-contact outlet 10.

Although the preferred embodiments of the present invention have been described above as examples, the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the gist of the present invention. Needless to say. For example, the resonance capacitor 32.42 shown in FIG. 2 may be omitted. Also,
The number of coils is not limited to two, and may be one, three or more, and the connection method is not limited to the embodiment. Anyway, various structures can be adopted according to the purpose. Here, the “structure corresponding to the purpose” refers to a structure determined by parameters such as power, cost, efficiency, safety, and reliability. Further, in the above embodiment, the electric power is transmitted in a non-contact manner using a magnetic field. However, the present invention is not limited to this. For example, the electric power may be transmitted in a non-contact manner using an electric field.

[0029]

As described above, in the non-contact power transmission device according to the present invention, since power is transmitted from a non-contact type outlet to a non-contact type plug in a non-contact manner, conducted noise can be prevented. , The risk of electric shock can be eliminated.

[Brief description of the drawings]

FIG. 1 shows a schematic configuration of a non-contact power transmission device according to an embodiment of the present invention, where (a) is an external perspective view and (b)
FIG. 3 is a cross-sectional view showing a state when a non-contact plug is inserted into a non-contact outlet.

FIG. 2 is a circuit diagram showing a circuit configuration of a power transmission unit built in a non-contact type outlet and a power reception unit built in a non-contact type plug.

FIG. 3 is a plan view showing a coil device used as a coil constituting a power transmission unit and a power reception unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Non-contact type outlet 10a Opening 20 Non-contact type plug 30 Power transmission part 31 Primary coil 32 Resonance capacitor 33 AC / DC converter 34 DC / AC converter 40 Power reception part 41 Secondary coil 42 Resonance capacitor 43 Rectifier diode 44 Smoothing Capacitor 50 Coil device 51 Soft magnetic material 52, 53 Spiral coil

Claims (10)

[Claims] 1. A non-contact outlet comprising a power transmitting means for transmitting power to a plug-in non-contact plug in a non-contact manner. 2. The power transmission means includes a coil.
Non-contact type outlet described in. 3. The power transmitting means includes: a flat soft magnetic material;
The non-contact outlet according to claim 1, further comprising a plurality of spiral coils provided on the soft magnetic material. 4. The non-contact type outlet according to claim 3, wherein the plurality of spiral coils are connected such that magnetic flux directions of adjacent ones at a certain moment are opposite to each other. 5. A non-contact plug for use with the non-contact outlet according to claim 1, wherein the non-contact plug includes a power receiving means for receiving power transmitted from the power transmitting means in a non-contact manner. Expression plug. 6. The power receiving means includes a coil.
Non-contact type plug described in 1. 7. The power receiving means comprises: a flat soft magnetic material;
The non-contact plug according to claim 5, further comprising a plurality of spiral coils provided on the soft magnetic material. 8. A non-contact outlet having a built-in power transmitting means for transmitting power in a non-contact manner, and a power receiving means inserted into the non-contact type outlet and receiving power transmitted from the power transmitting means in a non-contact manner. A non-contact type power transmission device comprising: a non-contact type plug; 9. The power transmitting unit and the power receiving unit each include a coil, and transmit electric power from the power transmitting unit to the power receiving unit in a non-contact manner by utilizing an electromagnetic induction effect generated between the coils. The non-contact power transmission device according to claim 8. 10. The power transmitting means includes a power transmitting soft magnetic material having a flat plate shape, and a plurality of power transmitting spiral coils provided on the power transmitting soft magnetic material. A power receiving side soft magnetic material, and a plurality of power receiving side spiral coils provided on the power receiving side soft magnetic material and magnetically coupled to the power transmitting side spiral coil,
The non-contact power transmission device according to claim 8, wherein: