JPH07231586A - Cordless power station - Google Patents

Abstract

PURPOSE:To increase the power to be transmitted while enhancing the conversion efficiency by a structure wherein the opposing coils includes an output side part and an input side part and a soft magnetic member is provided at the outside part at least for the output side part. CONSTITUTION:A flat spiral coil 2 having an air core and a lead wire 3 is formed using a copper wire Lc. A pair of flat spiral coils 2a, 2b are employed as opposing coils while a soft magnetic ferrite plate 1 is employed as a soft magnetic member being mounted on the outside at the output side part 2a of the flat spiral coil. The reason of enhancing the transmission power, conversion efficiency, etc., by mounting the soft magnetic member or members onto the output side coil or the input and output side coils is that the flux generated from the coil passes intensively through the soft magnetic member thus reducing the flux leakage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless power station for transmitting electric power in a contactless manner by an electromagnetic induction effect generated between coils.

[0002]

2. Description of the Related Art Conventionally, a method of transmitting electric power in a contactless manner by utilizing an electromagnetic induction effect generated between coils opposed to each other via a gap is called a cordless power station. This cordless power station is a journal of the Japan Society for Applied Magnetics [17,485-488] published in 1993.
Since the noncontact power transmission can be performed as an example of its use, as disclosed in, for example, the Institute of Electrical Engineers of Japan, published in 1991 [A, 111-A, 807], Studies include effective means for supplying power to the heart drive device.

Incidentally, a pair of coils are used in a transformer for a completely implantable artificial heart, and the transformer is required to be thin. The thickness of the transformer using amorphous magnetic material as the magnetic material for energy transmission of the drive device of the artificial heart is about 3 mm, but in the pot core type using ferrite, the thickness of the transformer is Is about 15 mm.

Such a cordless power station is used for supplying electric power to and charging a microcomputer, a portable electric home appliance, and the like, as well as supplying electric power to a drive device for an artificial heart, and functional electrical stimulation (FES; Function).
It can also be applied to the null Electric Stimulation). The application in each of these fields is industrially beneficial and is regarded as very important since a safe and highly flexible system can be constructed.

Particularly, the functional electrical stimulation is to restore the damaged sensory function and motor function by applying electrical stimulation to the nervous system and the muscular system. Generally, conventional methods for applying electrical stimulation to the nervous system and muscular system include a surface electrode method, a percutaneous twisted wire electrode method, and an embedded electrode method.

However, the surface electrode method has a drawback in that it cannot roughly stimulate individual muscles because it roughly stimulates the muscle system electrically. In the case of the percutaneous twisted electrode method, the electrode is wound around the target nerve fiber through the skin or a needle-shaped electrode is pierced into the muscular system, which causes another disease such as infection. There is a possibility that it will require hygienic strict management. Moreover, in the case of the percutaneous twisted electrode method, there is a problem that the range of activity of the patient is limited, and rehabilitation takes a very long time.In some cases, the electrodes must be replaced at each recovery stage. Instead, this becomes a factor that delays the recovery of physical function.

Therefore, the embedded electrode method is drawing attention as a solution to the problems of the surface electrode method and the percutaneous twisted wire electrode method. In the embedded electrode method, adoption of a non-contact signal transmission system is being considered, but as a conventional method, a method using a ferrite pot core or a method using the above cordless power station is known. In the latter method, a non-contact type signal transmission device configured by replacing the primary side (input side) connected to the power supply of the opposing coil in the cordless power station with a signal source is replaced as a part of the physical function recovery device. Used.

By the way, a general IC card is operated in a card utilization system, and has a high functionality such as having a memory function and an arithmetic function, and a security function can be easily provided. There is.

FIG. 15 shows the basic structure of a conventional IC card. This IC card 8 is an IC module 9, an electric power control unit 11 that controls electric power supplied to the IC module 9, an electric power receiving contact terminal 24 that guides electric power to the electric power control unit 11 from the outside, and information about an external device. The signal input / output contact terminals 23 and the like for delivering and receiving are connected by the lead wires 25, 26 and 27, and are housed in a plate-like case 10 made of metal or resin. . In addition, the power control unit 11 may include a power storage device 28 if necessary.
Are connected via the power storage control unit 29 and are used as a power source for the memory of the IC card 8 being carried. The IC card 8 having such a structure is usually carried by the owner and inserted into card reader / writers arranged at various places for use. At this time, the IC card 8 receives electric power from the contact terminal 24 or the built-in power storage device 28, and exchanges a predetermined signal with the stationary device to operate.

Here, as the storage battery 28 for the power control unit 11, a disposable battery or a rechargeable secondary battery that is replaced every time it is consumed, and a rechargeable secondary battery are built-in. However, it is used in such a form that it is charged when it is moored and stored on a fixed machine such as a card reader / writer having a charging circuit or a charging stand, and discharged from the secondary battery when carrying it. There is.

However, the exchangeable type has a problem that the replacement is complicated in both the disposable type and the rechargeable type, and it may be completely consumed during storage and cannot be used when desired. Managing batteries during storage is complicated.

[0012] Therefore, as a countermeasure for this, a fixed machine using a rechargeable battery provided with contact terminals for power supply and an IC card provided with contact terminals for power reception are combined to fix the card reader / writer. Needed by supplying power to the IC card through the contact terminals to operate the IC module or charging the built-in battery when it is inserted into the machine or placed on a stationary charging machine. At any time, I take out the IC card so that I can use it.

Further, in a general portable telephone, a transmission / reception portion of a general-purpose telephone terminal device is separated from the terminal device to be a portable mobile device, which is incorporated so that it can be carried without a connection cord. It is structured to operate with the electric power of a storage battery, and for example, mobile phones such as a child device of a parent-child phone, a paging device, and a mobile wireless phone are known.

FIG. 16 shows a basic structure of a rechargeable portable telephone in which a conventional stationary machine and a mobile machine are combined. In this mobile phone, a mobile device 32 is equipped with a mobile device terminal device 33 corresponding to a part or all of the phone, and the mobile device terminal device 33 is provided for communicating with an antenna 42 of a stationary device 43. The antenna 34 is attached. Further, the mobile device terminal device 33 is connected to a power storage control unit 35 as a power source for driving the mobile device terminal device 33 while being carried,
The power storage control unit 35 is connected to a power receiving contact terminal 48 exposed on the surface of the mobile device 32 that contacts the stationary device 43. Further, the stationary device 43 is provided with a stationary device terminal device 41 having a signal line 44 for controlling communication with the mobile device 32, and the stationary device terminal device 41 is provided with the stationary device 43.
An antenna 42 for communicating with 2 is attached. Further, at a predetermined position of the stationary machine 43 where the mobile machine 32 is moored, a power supply contact terminal 47 for supplying electric power to the mobile machine 32 is provided, and the power supply contact terminal 47 is provided on the stationary machine 43. Power control unit 4 having a fixed power line 45
Connected to 6.

In this portable telephone, the power control unit 4
6 charges the storage device of the mobile device 32 through the contact terminals 47 and 48, and directly charges the mobile device terminal device 33 as necessary.
The electric power is also supplied to the terminal device 41 for stationary equipment. When the power receiving contact terminal 48 comes into contact with the power feeding contact terminal 47 of the stationary machine 43 and is electrically connected, the power supply control unit 46 of the stationary machine 43 passes the contact point to the power storage control unit 46 of the mobile machine 32 to supply power. Is supplied, and as a result, the power storage control unit 35 stores power.

[0016] Such a portable telephone is operated by the electric power of the built-in electric storage device, and even in the case of this electric storage device, the same type of electric storage device as the electric storage device for the electric power control unit 11 in the above-mentioned IC card is used, and is exactly the same. I have a problem.

To solve this problem, a rechargeable battery is used to combine a stationary machine for power supply with a mobile machine containing a handset to charge a battery built in the mobile machine while mooring the stationary machine. By doing so, it is possible to take it out and use it without connecting the connection cord for the power supply when necessary.

[0018]

However, in the case of the above-mentioned cordless power station, the coil in which the air core is formed by using the amorphous magnetic wire material is capable of non-contact power transmission and has realized a thin structure. There are major drawbacks such as high transmission power not being obtained and low conversion efficiency. That is, in the case of the conventional cordless power station, the transmission coil for the low impedance load can be constructed relatively easily, but in order to construct the transmission coil for the high impedance load, the number of windings of the coil must be increased in order to improve the inductance. Must be increased, and in such a case, the signal transmission level is lowered due to the increase in winding resistance.

Further, a coil using a ferrite pot core is excellent in transmission power and conversion efficiency, but on the other hand, there is a drawback that the thickness of the transformer cannot be made sufficiently thin. Therefore, if it is attempted to be applied to the above-mentioned embedded electrode method in the field of functional electrical stimulation, the height for implanting in the body becomes too high and it is difficult to apply. Incidentally, a non-contact type signal transmission device using a cordless power station also has a problem that the cordless power station itself lowers the signal transmission level due to the increase in winding resistance as described above. However, its suitability as a body function recovery device has not been sufficiently achieved.

On the other hand, in the case of the conventional IC card, the electrical connection for supplying power from the stationary device such as the IC card reader / writer or the dedicated charging stand is carried out on the surface at a predetermined position of both cases as described above. Between the contact terminals arranged to be exposed. Since the electrical connection is made by mechanical contact as described above, a spring structure or the like is adopted for the contact terminal in order to obtain a reliable connection.

Further, also in the case of the conventional portable telephone, the electrical connection between the mobile unit and the stationary unit is such that the contact terminals are arranged so as to be exposed on the surfaces of the predetermined positions of both cases as described above. Are done in contact with each other. As described above, since electrical connection is made by mechanical contact, a spring structure or the like is used for one of the contact terminals in order to ensure a reliable connection.

However, since the contact terminal is exposed to the outside in such a structure, if dust or dirt adheres to the contact terminal or the surface of the terminal oxidizes, contact failure occurs and an IC card or a mobile unit is mounted on the stationary machine. There is a risk that charging will not be performed even if the battery is placed, and as a result, there is a risk that the device cannot be used when necessary or that abnormal heat is generated at the contact point and the device is damaged.

The present invention has been made to solve the above problems, and its technical problem is to provide a thin cordless power station capable of sufficiently increasing the transmission power and the conversion efficiency. is there.

Another technical object of the present invention is to provide a body function recovery device using a non-contact type signal transmission device which can be effectively adopted for the embedded electrode method in the field of functional electrical stimulation.

Still another technical problem of the present invention is an IC card having a structure in which electric power can be safely and surely supplied from a stationary machine without causing connection failure due to corrosion or contamination of contacts.
Another object of the present invention is to provide a mobile phone having a structure in which electric power can be safely and surely supplied from a stationary device without causing connection failure due to corrosion or contamination of contacts and spark discharge due to connection.

[0026]

According to the present invention, there is provided a cordless power station which includes coils facing each other through a gap, and which transmits electric power in a contactless manner by utilizing an electromagnetic induction effect generated between the coils facing each other. , The opposing coils include an output side portion and an input side portion, and a cordless power station in which a soft magnetic material portion is attached to at least the outside portion of the output side portion can be obtained.

Further, according to the present invention, in the above cordless power station, a cordless power station in which a capacitor is inserted in the output side portion can be obtained.

Furthermore, according to the present invention, in any one of the above cordless power stations, the opposing coil is a flat spiral coil, and the soft magnetic material portion is a soft magnetic ferrite plate. The ferrite plate is a cordless power station mounted on the outer side of each of the input side portion and the output side portion.

In addition, according to the present invention, in the above cordless power station, the opposing coils are composed of a plurality of opposing groups by connecting a plurality of planar spiral type coils, and each of the input side portion and the output side portion. Including a portion, the soft magnetic material portion is a soft magnetic ferrite plate, and a cordless power station in which the soft magnetic ferrite plate is mounted at least on the outer side of the output side portion, or a plane composed of a plurality of opposing pairs. Adjacent ones of the spiral type coils are connected to each other so that the directions of the magnetic flux are opposite to each other, or a soft magnetic ferrite plate is attached to the outer side of each of the input side portion and the output side portion. A cordless power station is obtained.

Further, according to the present invention, in any one of these cordless power stations, a cordless power station in which the thickness of the soft magnetic ferrite plate is in the range of 0.1 to 5.0 [mm] can be obtained. .

[0031]

As a result of various studies, the present invention selects the number and connection method of the coils, the type of magnetic material to be mounted on the coils, the thickness of the magnetic material plate, the configuration of the output side circuit, etc. It has been found that the cordless power station can realize a significant increase in transmission power and an improvement in conversion efficiency. As a configuration for that, for example, by mounting a soft magnetic material portion on the outer side of the output side portion of the opposing flat spiral coil, on the outer side of each of the input side portion and the output side portion of the opposing flat spiral coil. Mounting a soft magnetic material portion, connecting a plurality of planar spiral coils to form a plurality of opposing sets, and mounting the soft magnetic material portion at least on the outer side of the output side portion; In the set of flat spiral coils, the adjacent ones are connected so that the directions of the magnetic flux are opposite to each other, a capacitor is inserted in the output side portion of the flat spiral coil, and the soft magnetic material part to be mounted Examples of the method include setting the thickness of the soft magnetic ferrite plate to 0.1 to 5.0 [mm].

In the cordless power station, a mobile device including an output side portion and a power storage unit connected to the output side portion, and a fixing device including an input side portion and a power feeding unit connected to the input side portion, A cordless power station system that supplies power from the power supply unit to the power storage unit of the mobile device is configured to enable application in various fields.

For example, in the IC card system in which the moving device is provided in the IC card and the fixing device is provided in the card reader / writer, the power receiving coil on the output side (secondary side) of the IC card and the input in the card reader / writer are provided. Side (primary side) power supply coil is structurally formed separately, and is placed in a predetermined position close to each other in a non-contact state during use, so that the power receiving coil and the power supply coil are in a mutual induction state. Electric power is supplied between the fixed machine and the mobile machine. That is, the electrical connection between the IC card and the fixing device is a non-contact type instead of the conventional mechanical contact. Therefore, this IC
In the card system, electric power can be supplied from the stationary device to the IC card without having mechanical contacts, and charging can be turned on / off by moving the coils closer or farther apart. This makes it possible to provide an IC card that is safe and can always operate normally without worrying about sparks or noise when the power receiving circuit is opened or closed, and can be accommodated in an insulated state in the case without worrying about corrosion of contacts. By the way, in this IC card system as well, the soft magnetic material portion is attached to the outside of the power receiving coil or the power feeding coil, so that the power transfer efficiency from the power feeding coil to the power receiving coil is improved, and the entire system is downsized. It will be possible.

Also in the portable telephone system comprising the mobile device having the mobile device and the stationary device having the stationary device, the power receiving coil on the output side (secondary side) of the mobile device and the input of the stationary device. Side (primary side) power supply coil is structurally formed separately, and is placed in a predetermined position close to each other in a non-contact state during use, so that the power receiving coil and the power supply coil are in a mutual induction state. Electric power is supplied between the fixed machine and the mobile machine. Therefore, in the case of this mobile phone system, the same operational effects as in the case of the IC card system can be obtained. Further, in the mobile phone system, by disposing a sensor capable of detecting the presence of each other in each of the mobile device and the fixed device, it is possible to efficiently supply and manage power to the mobile device.

[0035]

The cordless power station of the present invention will be described in detail below with reference to examples. First, the outline of the cordless power station of the present invention will be briefly described.

This cordless power station transmits electric power in a non-contact manner by utilizing the electromagnetic induction effect generated between the coils facing each other through a gap, and the coils facing each other include an output side portion and an input side portion. In addition, the soft magnetic material portion is attached to at least the outer side portion of the output side portion. The soft magnetic material portion has an effect of preventing magnetic flux leakage, as described later. In the case of such a cordless power station, an increase in transmission power and an improvement in conversion efficiency are remarkable as will be described later.

Here, of the opposing coils, the coil connected to the power source (signal source) is the primary side (input side), and the coil connected to the device is the secondary side (output side).
Then, several different cordless power stations can be configured to further enhance the transmission power and the conversion efficiency.

For example, if the opposing coils include an output side portion, a configuration (not shown) in which a capacitor is inserted in the output side portion can be used. Further, as shown in FIG. 1, a flat spiral coil 2 formed so as to have an air core by using a copper wire L _c and a lead wire 3 is used so that an opposing coil is formed as shown in FIG. A configuration in which a pair of planar spiral coils 2a and 2b are used, the soft magnetic material portion is a soft magnetic ferrite plate 1, and the soft magnetic ferrite plate 1 is attached to the outer side of the output side portion 2a of the planar spiral coil. Alternatively, as shown in FIG. 3, the soft magnetic ferrite plate 1 is provided on the outer side of each of the input side portion 2b and the output side portion 2a of the pair of planar spiral coils 2a, 2b.
An example is a configuration in which b and 1a are mounted.

In addition, as shown in FIG. 4, a plurality of flat spiral coils are connected to form a plurality of opposing groups, and the input side portions 2b and 2b 'and the output side portions 2a and 2a are respectively formed.
′ Is included, and a large soft magnetic ferrite plate 1 ′ is provided at least on the outer side of the output side portions 2a, 2a ′.
A cordless power station equipped with the
As shown in FIG. 2, the output side portions 2a and 2a ′ and the input side portion 2
b, 2b 'on the outer side of each soft magnetic ferrite plate 1
a ', 1b' are attached, and with respect to a plurality of opposing sets of planar spiral coils, adjacent ones (2a, 2b and 2a ', 2b') in those sets are made to have opposite magnetic flux directions. A configuration in which they are connected is also included.

However, the thickness of the soft magnetic ferrite plate used in these cordless power stations is 0.1-5.
It is preferably 0 [mm].

In some of these cordless power stations, the reason why the transmission power, the conversion efficiency, etc. are improved by mounting the soft magnetic material portion on the outer side of the output side coil or the input side and output side coils is as follows. This is because the magnetic flux generated from the coil passes through the soft magnetic material portion in a concentrated manner, so that the leakage magnetic flux can be reduced. The reason for using soft magnetic ferrite as the magnetic material of the soft magnetic material part to be mounted is that the soft magnetic ferrite has high electric resistance and excellent AC characteristics. Further, the reason for limiting the thickness of the soft magnetic ferrite plate to the range of 0.1 to 5.0 [mm] is that the effect of trapping magnetic flux is clearly recognized when it is set to 0.1 mm or more, but 5.0 mm or more. This is because the effect of reducing the thickness is significantly reduced. In addition, the reason why the opposing coils are plane spiral coils is that when multiple air-core coils are densely arranged on the same plane, the amount of magnetic flux increases correspondingly. This is because

On the other hand, when a plurality of flat spiral coils are connected to form a flat spiral coil with a plurality of opposing pairs,
There are a connection method in which all the generated magnetic fluxes have the same direction, and a connection method in which the directions of the magnetic fluxes of adjacent ones in the set are reversed. The latter configuration has the advantage that the magnetic fluxes are mutually strengthened and the leakage magnetic flux to the outside is small, and the influence on the peripheral devices can be reduced. When the planar spiral coil is placed in close contact with such a configuration, the mutual inductance between the adjacent coils effectively acts in addition to the mutual inductance between the primary and secondary coils, resulting in remarkable transmission power and conversion efficiency. Will be improved. Incidentally, if a capacitor is inserted in the output side portion of the coil, the conversion efficiency is improved, but this is because the supply power consumed for the excitation is reduced. Further, when the primary side (input side) of such a cordless power station is connected to the signal source, it functions as a non-contact type signal transmission device.

The cordless power station and the non-contact type signal transmission device described above will be described below with reference to some specific embodiments including the manufacturing method thereof.

Example 1 In Example 1, first, the chemical composition ratio was 14NiO.6CuO.32ZnO.4 respectively.
8Fe ₂ O ₃ (hereinafter, Ni-Cu-Zn system ferrite A
, 12NiO ・ 6CuO ・ 32.5ZnO ・ 4
9.5Fe ₂ O ₃ (hereinafter, referred to as Ni-Cu-Zn ferrite B), and 35.7MnO · 11.0ZnO ·
53.3Fe ₂ O ₃ in additives was added in small quantities SiO _2, CaO (hereinafter referred to as Mn-Zn ferrite) so that the iron oxide _{(α-Fe 2 O 3)} , nickel oxide (N
iO), cupric oxide (CuO), zinc oxide (ZnO),
And manganese tetraoxide (Mn ₃ O ₄ ) were used as raw material powders and wet mixed in a ball mill for 20 hours.

Next, these raw material mixed powders were mixed with each other in the air at 80
After calcination at 0 ° C. for 2 hours, it was wet pulverized with a ball mill for 3 hours to obtain a molding powder. Subsequently, 1 wt% of PVA was mixed with this molding powder, and a molding pressure of 1 [ton was used so that the outer diameter was about 40 mm and the thickness was about 3 mm.
/ Cm ² ]. Separately, for measuring the characteristics of the sintered body, it was molded into a ring shape with an outer diameter of about 20 mm, an inner diameter of about 14 mm, and a height of about 7 mm.

Further, Ni-Cu-Zn type ferrite A,
Regarding B, it was sintered by holding it at about 1100 ° C. for 2 hours by gradually heating it in the air and cooling it in the furnace. The Mn-Zn ferrite was sintered by holding it at 1280 ° C for 2 hours in a nitrogen atmosphere containing 0.5% oxygen. Next, these spinel type ferrite sintered bodies were processed into a disk shape to prepare a ferrite disk having a diameter of 35 mm and a thickness of 1 mm.

Next, the electromagnetic characteristics relating to the DC specific resistance ρ _DC and relative permeability μ of these ferrite sintered bodies were measured. However, the DC specific resistance ρ _DC uses a bridge, and the relative permeability μ uses an impedance analyzer.
The relative permeability μ ₁₀₀ kHz at _kHz was measured. As a result, N
i-Cu-Zn-based ferrite A has a DC resistivity ρ _DC of 3 ×
10 ⁹ [Ω · m], relative permeability μ _{100 kHz} is 970,
The direct current resistivity ρ _{DC of} Ni-Cu-Zn ferrite B is 8
× 10 ⁹ [Ω · m], relative permeability μ _{100 kHz} is 2100, and Mn-Zn ferrite has a DC specific resistance ρ _DC of 3 × 1.
0 ² [Ω · cm], and relative permeability μ _{100 kHz} was 2250.

On the other hand, as a comparative example using a metal material,
An amorphous thin wire having excellent high frequency characteristics was prepared. The electromagnetic characteristics of this amorphous thin wire are those having a diameter of 50 μm and a relative permeability μ _{100 kHz} of 40,000. 15 bundles of 400 amorphous thin wires are arranged in a radial pattern,
Amorphous magnetic wire rods were produced so that the outer diameter of these was 35 mm and the thickness thereof was 2.5 mm.

As a donut-shaped flat spiral coil, a bundle of 100 copper wires each having a diameter of 100 μm is wound for 5 turns, and the outer diameter is 30 mm, the inner diameter is 15 mm, and the thickness is 1.5.
The one that is connected to the power supply with these facing each other is the primary side (input side), and the one that outputs by electromagnetic induction is 2
It was the next side (output side).

Next, these planar spiral coils are made to face each other with a gap of 1 mm, and the air core and the outer side of both the primary side and the secondary side of the facing planar spiral coils are respectively opposed. Each of the above-mentioned soft magnetic ferrites and amorphous magnetic wire rods was mounted, and a pure resistance load was further connected to the secondary side to manufacture various cordless power stations having the configurations shown in FIGS. 2 and 3.

Therefore, for each of these cordless power stations, the secondary side output (maximum transmission power) P ₂ and the conversion efficiency η [under the constant conditions of the power source frequency f = 100 kHz and the primary side voltage V ₁ = 4 V, respectively. However, when η = (output power / input power) · 100] (%) was obtained, the results shown in Table 1 were obtained.

[0052]

[Table 1]

From Table 1, it is apparent that when the magnetic material is attached, the secondary side output P ₂ and the conversion efficiency η are improved as compared with the case of the air core in which the magnetic material is not attached. It can be seen that the secondary output P ₂ and the conversion efficiency η are significantly improved by using soft magnetic ferrite as compared with the wire material. Furthermore, it can be seen that the soft magnetic ferrite shows significantly higher values in each measured value when it is attached to both the primary and secondary sides than when it is attached only to the secondary side.

Therefore, from Table 1, it is necessary to mount a magnetic material on the coil, or to mount a magnetic material on the outside of at least the secondary coil, or preferably on the outside of both the primary and secondary coils. It can be said that when the cordless power station is mounted and the magnetic material to be mounted is a soft magnetic ferrite plate, a clear effect can be recognized in the increase of the transmission power and the improvement of the conversion efficiency in the cordless power station.

On the other hand, in place of the Mn-Zn ferrite material used here, another Mn-Zn ferrite material is used.
Ferrite disk sintered by holding it at 1290 ° C for 2 hours in a nitrogen atmosphere containing 0.8% oxygen (DC specific resistance ρ _DC is 3 ×
10 ² [Ω · cm], the relative permeability mu _100kHz those 2320) 1 who is connected to a signal source by exactly the same conditions as in the above except for employing primary (input side), an electromagnetic induction The plane spiral coil whose output is generated at the secondary side (output side) is made to face each other with a gap of 1 mm, and the air core and the secondary side, the primary side of the pair of plane spiral coils are arranged. And the soft magnetic ferrites described above on the outer sides of the secondary sides,
Amorphous magnetic wire was attached, and a pure resistance load was further connected to the secondary side to produce various non-contact signal transmission devices. For these various non-contact signal transmission devices, the signal source frequency f = 100 kHz, Primary voltage V ₁ = 2 mV
Secondary output (maximum transmission power) under constant conditions of
P ₂ , conversion efficiency η [where η = (output power / input power)
.100] (%) was obtained, and the results shown in Table 2 were obtained.

[0056]

[Table 2]

From Table 2, the conversion efficiency η for the Ni-Cu-Zn ferrite materials A and B and the Mn-Zn ferrite material is 80% or more. However, when the amorphous magnetic wire is used, the conversion efficiency η is shown. Was found to be as low as 20% or less. That is, if the magnetic material to be mounted is also a soft magnetic ferrite plate, a clear effect can be recognized in the increase of the transmission output and the improvement of the conversion efficiency in the non-contact signal transmission device.

(Example 2) In Example 2, the Ni-Cu-Zn ferrite A disk prepared in Example 1 was further polished to a thickness of 0.5 mm.

Next, with respect to the doughnut-shaped opposing flat spiral type coil obtained by the same procedure as in Example 1, the ferrite disk having a thickness of 0.5 mm prepared here was used for the secondary side, the primary side and the secondary side. The cordless power stations and various non-contact type signal transmission devices having the configurations shown in FIGS. 2 and 3 were produced by mounting the secondary side outer portions.

Therefore, regarding each cordless power station, the power source frequency f = 100 kHz, the primary side voltage V ₁ = 1.3 V, and the secondary side current I ₂ is 0 to 0.
When the secondary side output P ₂ and the conversion efficiency η were measured while being varied within the range of 2 [A], the results shown in FIGS. 6A and 6B were obtained. For comparison, measurement was also performed on the case of an air core without a ferrite disk attached under the same conditions.

From FIG. 6 (a), it can be seen that the conversion efficiency η and the transmission capacity are remarkably improved by mounting the ferrite disks on the secondary side or both the primary side and the secondary side as compared with the air core. I understand. Further, it can be seen from FIG. 6 (b) that the secondary side output P ₂ can be increased by mounting the ferrite discs on the secondary side or both the primary side and the secondary side as compared with the air core. Further, from FIGS. 6 (a) and 6 (b), the ferrite disk is
It can be seen that both the secondary output P ₂ and the conversion efficiency η are remarkably improved when they are mounted on both the secondary and secondary sides.

By the way, regarding each non-contact type signal transmission device as well, the signal source frequency f = 100 kHz and the primary side voltage V ₁
= 1.3 V and the secondary side current I ₂ is 0 to 0.
When the conversion efficiency η with respect to the secondary side output P ₂ was measured while varying the range of 3 [mA], the result shown in FIG. 7 was obtained. For comparison, measurement was also performed on the case of an air core without a ferrite disk attached under the same conditions.

From FIG. 7, the curve C2 when the ferrite disk is mounted on the secondary side is different from the curve C2 when the air core is used.
And, comparing the curves C1 when mounted on both the primary and secondary sides, obviously, the conversion efficiency η and the transmission capacity are significantly improved when the ferrite disk is mounted, compared with the case where the air core is used.
Further, it can be seen that the conversion efficiency η and the transmission capacity are further improved when the ferrite discs are mounted on both the primary and secondary sides than when the ferrite discs are mounted on the secondary side.

Incidentally, FIG. 8 shows an equivalent circuit in the case of the air core in the second embodiment. This equivalent circuit is 1
Winding resistances r ₁ and r ₂ in the secondary and secondary coils, self-inductances L ₁ and L ₂ in the primary and secondary coils, and windings in the secondary coil It includes a capacitor C and a pure load resistor R _L interposed between a resistor r ₂ and a self-inductance L ₂ . Here, there is a mutual inductance M between the self-inductances L ₁ and L ₂ , and the primary side current I ₁ flows from the self-inductance L ₁ to the terminal side and the secondary side current I ₂
From the pure load resistance R _L side to the self-inductance L ₂ side,
It is shown that the secondary voltage V ₂ goes from the pure load resistance R _L side to the capacitor C side, but the pure load resistance R _L has 10
The one with 0 Ω is used. Therefore, the non-contact signal transmission device according to the second embodiment has a signal transmission characteristic suitable for a high load impedance circuit of about 100Ω.

(Example 3) In Example 3, Ni-Cu-Zn ferrite A was used in the same procedure as in Example 1,
A ferrite disk having a diameter of 35 mm and a thickness of 1 mm and a ferrite disk having a short diameter of 35 mm, a long diameter of 70 mm and a thickness of 1 mm were produced.

Next, with respect to the doughnut-shaped opposing flat spiral spiral coil having a diameter of 30 mm, which was manufactured by the same procedure as in Example 1, the ferrite disks were attached to the outer sides of the secondary side, the primary side and the secondary side. Attached to the cordless power station as shown in FIG. 2 and FIG. 3 and two flat spiral coils produced in the same manner are connected to each other, and two pairs of flat spiral spiral coils facing each other are provided with ferrite. The ellipse is the secondary side, the primary and the second
Next, the cordless power station as shown in FIGS. 4 and 5 was manufactured by mounting the cordless power station on both outer sides. Incidentally, regarding the two sets of opposed planar spiral coils in the latter cordless power station, the two adjacent sets are connected so that the directions of the magnetic fluxes of the adjacent ones are opposite to each other, and the two of the opposed planar spiral coils are opposed to each other. The gap is 1 mm.

Then, for each of these cordless power stations, the secondary side output P ₂ and the conversion efficiency η were obtained under the same conditions as in Example 1, including the case of the air core without the ferrite disk. The results are shown in Table 3.

[0068]

[Table 3]

It can be seen from Table 3 that two flat spiral type coils are connected to each other to form two sets of opposed flat spiral type coils, as compared with those using one flat spiral type coil. It can be seen that the secondary output P ₂ and the conversion efficiency η are improved.
Further, it can be seen that in comparison with these, the air-core type has deteriorated much in both the secondary side output P ₂ and the conversion efficiency η.

On the other hand, here also, the primary side (input side) of the planar spiral coil is connected to the signal source, and 2
The secondary side (output side) is the one where the output is generated by electromagnetic induction, and the ferrite cores described above are provided on the air core of the flat spiral coil facing each other and on the outer side of each of the secondary side, the primary side and the secondary side. Also, various non-contact type signal transmission devices were manufactured by mounting the ferrite elliptical disk, and with respect to these various non-contact type signal transmission devices, the signal source frequency f = 100 kHz and the primary side voltage V ₁ = 2 mV under constant conditions. Then, when the secondary side output (maximum transmission power) P ₂ and the conversion efficiency η [where η = (output power / input power) · 100] (%) are obtained, the results shown in Table 4 are obtained. It was

[0071]

[Table 4]

As in the case of Table 3, from Table 4 as well, two flat spiral spiral coils are connected to each other to form two sets of opposed flat spiral coil (represented as two pairs of coil connections). Is 2 compared to the one using one flat spiral coil
Although the secondary output P ₂ and the conversion efficiency η are improved, the air-core ones are significantly deteriorated in comparison with the secondary output P ₂ and the conversion efficiency η regardless of the coil connection state. I understand.

(Example 4) In Example 4, Ni-Cu-Zn ferrite A was used in the same procedure as in Example 1,
Outer diameter is 35 mm and thickness is 0.2, 0.5, 1.
0, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0
A [mm] ferrite disk was prepared.

Next, in the same procedure as in Example 2, the above-mentioned ferrite disks were attached to the outer sides of both the primary and secondary sides with respect to the donut-shaped opposing flat spiral type coil, and FIG. Various cordless power stations having the structure as shown in were manufactured.

When the conversion efficiencies η of these various cordless power stations were determined, the results shown in FIG. 9 were obtained.

From FIG. 9, it can be seen that the conversion efficiency η is obviously improved by mounting the ferrite disk.
Especially when the thickness of the ferrite disk is 0.1 mm or more,
It can be seen that the conversion efficiency η is significantly improved.

On the other hand, the thickness of the ferrite disk is 0.1, 0.2, 0.5, 1.0, 1.5, 2.0, respectively.
Various non-contact type signal transmission devices were manufactured under exactly the same conditions except that the values were 2.5, 3.0, 4.0 and 5.0 [mm], and the conversion efficiencies η of these were calculated. As shown in 10, it can be seen that the conversion efficiency η is significantly improved when the thickness of the ferrite disk is 0.1 mm or more.

(Example 5) In Example 5, Ni-Cu-
A disk having a thickness of 0.5 mm and a thickness of 1.0 mm prepared in Example 4 using Zn-based ferrite A was prepared, and Example 2 was used.
In the same procedure as above, mount these ferrite disks on the outer sides of the primary and secondary sides of the opposing flat spiral coil, and insert a 1 μF capacitor on the secondary side (output side). Various cordless power stations were made as inserts.

When the maximum transmission efficiency η _max of these various cordless power stations was determined, the results shown in Table 5 were obtained.

[0080]

[Table 5]

It can be seen from Table 5 that the maximum transmission efficiency η _max is obviously improved by inserting the capacitor in the output side portion.

On the other hand, when various non-contact type signal transmission devices were produced using the same ferrite disk and the maximum transmission efficiency η _{max of them} was determined, it was the same as that of the various cordless power stations shown in Table 5. It turns out that the results are obtained.

As described above, according to each of the above-described embodiments, the soft magnetic material portion is attached to the outer side of the output side portion of the facing flat spiral coil, and the input side portion and the output of the facing flat spiral coil are mounted. A soft magnetic material part is attached to each outer part of the side part, and a plurality of flat spiral coils are connected to form a plurality of facing pairs, and at least the soft magnetic material part is attached to the outer part of the output side part. In such a case, the pair of flat spiral coils composed of a plurality of facing pairs are connected so that the magnetic fluxes of adjacent ones are opposite to each other, and a capacitor is inserted in the output side portion of the flat spiral coil. By satisfying various conditions such as the thickness of the soft magnetic ferrite plate being 0.1 to 5.0 [mm] as the soft magnetic material part to be mounted, the cordless power station and the non-contact type signal transmission device can be obtained. Oh Transmission power that the conversion efficiency is seen to be remarkably improved.

In each of the embodiments, the case where the opposing coils are constituted by doughnut-shaped planar spiral coils having an outer diameter of 30 mm, an inner diameter of 15 mm and a thickness of 1.5 mm and facing each other with a gap of 1 mm has been described. However, the opposing coils are not limited to this, and in principle, even if the conductor diameter, shape, number of turns, size, and the gap between the coils are changed, electromagnetic induction is caused to act through the gap. It is applicable as long as it is obtained. Further, in each of the embodiments, the frequency of the power source or the signal source used for the measurement is set to 100 kHz, but the frequency is not limited, and if it is an alternating current, the frequency can be arbitrarily selected based on the principle of electromagnetic induction. . Further, the number of flat spiral coils used when forming a coil with a plurality of facing pairs is not limited, and the numbers of primary side and secondary side do not necessarily have to be the same. In addition, in the fifth embodiment, the capacitance of the capacitor inserted on the secondary side is described as 1 μF. However, since this value changes the optimum value depending on the input power condition and the load condition, it can be set arbitrarily according to it.

On the other hand, in each of the examples, the composition of the soft magnetic ferrite plate to be mounted was 14NiO.6CuO.
48Fe ₂ O ₃ , 12NiO ・ 6CuO ・ 32.5Zn
O · 49.5Fe ₂ O _3, and 35.7MnO · 11.
Ni-Cu- of 0ZnO · 53.3Fe ₂ O ₃ having a composition
A Zn-based ferrite or a spinel-type ferrite belonging to the Mn-Zn-based ferrite was manufactured, but since the present invention uses the transmission principle by electromagnetic induction,
The soft magnetic ferrite material is not limited to the above composition. For example, other soft magnetic ferrites include Mn-based ferrite, Mg, which is a general spinel type ferrite.
Series ferrite, Ni series ferrite, Cu series ferrite,
Li-based ferrite, Co-based ferrite and the like are mentioned, and further, a part thereof is substituted with ZnO or the like, or an additive is added, or a composition in which these are mixed is present in various kinds. As other soft magnetic ferrite materials other than the above, garnet-based ferrite materials and ferro-sprayer-based materials are known. The cordless power station and the non-contact type signal transmission device of the present invention can be made thin even in a variety of configurations using these various soft magnetic ferrite materials, and the transmission power and conversion efficiency can be remarkably improved.

(Embodiment 6) In Embodiment 6, a non-contact type signal transmission device constructed by connecting a primary side (input side) to a signal source in a cordless power station configured as shown in FIG. 3 is used. We constructed a device for recovering body function using the embedded electrode method in the field of functional electrical stimulation.

In this body function recovery device, as shown in FIG. 11, the primary side (input side) portions 2 of the flat spiral coils 2a and 2b facing each other of the cordless power station.
For the non-contact type signal transmission device configured by connecting b to the signal source unit 5 as a signal source, the planar spiral coils 2a and 2b
The secondary side (output side) portion 2a in the configuration is connected to the amplifying section 4 having the lead section 4a as a conductive nerve connecting member connected to the nerve 7 existing under the skin 6.

Here, the lead portions 4a of the amplifying section 4 are contact-connected to the respective ends of the nerve 7 that has been ruptured by the ruptured portion 7a, and an electrical signal generated by the electromagnetic induction action of the non-contact type signal transmission device is applied to the nerve. 7 is transmitted to each end.

According to this body function recovery device, as described above, the non-contact type signal transmission device is thin and the secondary side (output side) portion 2a embedded in the body thereof has a small space and the electrical signal generated without a cord is used. Since the transmission power and the conversion efficiency of the device are remarkably improved, the activity range of the patient is not restricted, and the hygienic management can be remarkably reduced as compared with the conventional one.

By the way, in the cordless power station as described above, it is fixed by the moving device including the output side part and the power storage part connected thereto and the fixing device including the input side part and the power feeding part connected thereto. By configuring a cordless power station system that supplies power from the power supply unit of the device to the power storage unit of the mobile device, application in various fields becomes possible.

For example, the moving device here is provided in an IC card and the fixing device is provided in a card reader / writer (fixing device) to configure an IC card system, or the moving device and the fixing device having the moving device are provided. A mobile phone system can be constructed from the provided fixed machine.

Therefore, in each of the following embodiments, an IC card system using a cordless power station and a mobile phone system will be described.

(Embodiment 7) In Embodiment 7, an IC card provided with a moving device including an output side portion of a cordless power station and a power storage unit connected to the cordless power station, and an input side portion of the cordless power station and connected thereto. And an IC card system including a card reader / writer provided with a fixing device including the power feeding unit.

In this IC card system, the IC card is, as shown in FIG. 12, an IC module 9 that performs information processing such as storage, calculation, and input / output control, and an antenna that transfers signals to and from this IC module 9. 12 and
The power control unit 11 is connected to the power storage unit 28 including an alkaline secondary battery and controls the power supplied to the IC module 9, and the power receiving coil 13 used as an output side (secondary side) portion of the cordless power station. And are connected by lead wires 14, 15 and 16 and then housed in a plastic case 10. Incidentally, the magnetic body 30 made of a soft magnetic ferrite plate is provided near the outer side of the power receiving coil 13, but the power receiving coil 13 has a surface which contacts the card reader / writer when the IC card 8 is inserted into the card reader / writer. The surface is housed near the inner surface at a predetermined position so as to be insulated from the outside by being covered with an insulating resin.

On the other hand, a card reader / writer provided with a fixing device which is used as a pair with such an IC card 8 is as follows.
A power feeding coil that is provided so as to face the power receiving coil 13 in a state where the IC card 8 is completely inserted, and that is used as an input side (primary side) portion of the cordless power station, and this power feeding coil. A power supply unit as a power supply unit that supplies power to the IC module, a signal control unit that controls an information processing signal exchanged with the IC module 9, and an IC by exchanging signals with the signal control unit. An antenna for communicating with the antenna 12 provided on the card 8 is connected by a lead wire and is housed in the housing. Incidentally, in this case as well, the feeding coil is housed with its surface covered with an insulating resin.

In this IC card system, when the IC card 8 is inserted into a predetermined position of the card reader / writer,
The power receiving coil 13 and the power feeding coil are arranged to face each other at a predetermined distance, and the mutual induction action is efficiently performed. At this time, the IC card 8 is supplied with power through the power receiving coil 13, and receives the supplied power through the power control unit 11 to operate the IC module 9 or charge the battery 28. Therefore, the power control unit 11
Functions as a power storage control unit 29 for the power storage device 28, which allows the power of the power storage device 28 to operate even when the IC card 8 is not moored to the card reader / writer.
The contents of the volatile memory in the C module 9 are retained.

In the IC card system of the seventh embodiment,
The receiving coil 13 and the feeding coil have an outer diameter of 15 m.
m, the inner diameter is 7 mm, and the thickness on the joint surface side of the case 10 is about 0.25 mm so that an interval of about 0.5 mm is maintained when the coils are coaxially close to each other. Further, when an alternating current of 100 kHz and 5V was supplied to the power supply coil as a power source through a power supply unit in the card reader / writer, the IC card 8 and the card reader / writer were normally operated and the battery 28 of the IC card 8 was charged. It was confirmed that it could be performed stably.

(Embodiment 8) In Embodiment 8, as shown in FIG. 13, a magnetic body 30 made of a soft magnetic ferrite plate is provided near the outer portions of the power receiving coil 13 and the power feeding coil 20, respectively.
An IC card system having the same configuration as that of the seventh embodiment except that the IC card system is provided is configured. Incidentally, the power receiving coil 13 and the power feeding coil 20 here are housed with their surfaces covered with an insulating resin,
The magnetic substance 30 has a magnetic permeability of about 1000 at 100 kHz.

Referring to FIG. 13, the card reader / writer 19 includes a power supply unit 3 as a power supply unit for supplying power to the power supply coil 20 with the IC card 8 completely inserted.
1 and the signal control unit 22 that controls the information processing signals exchanged between the IC module 9 and the antenna 12 provided in the IC card 8 by passing signals to and from the signal control unit 22. The antenna 21 for communication between the two is connected by the lead wires 14, 17, and 18, and is housed in the housing.

Also in the IC card system of the eighth embodiment, when an alternating current of 100 kHz and 5 V is supplied to the power feeding coil 20 as a power source through the power supply unit 31 in the card reader / writer 19, the IC card 8 and the card reader / writer 19 are connected. IC card 8 is operated normally
It was found that the battery 28 can be charged safely without fear of failure due to poor contact. That is, after inserting the IC card 8 into a predetermined position of the card reader / writer 19 and mooring it, the IC card 8 is carried and the other card reader / writer 1 is carried.
When used in No. 9, it was found to be stable and usable.

Further, in the IC card system of the eighth embodiment, the transfer efficiency of the electric power transferred from the card reader / writer 19 side to the IC card 8 side through the coils 20 and 13 is about 75%, which is the same as the seventh embodiment. It has been found that the improvement is about 70% of the case where the magnetic body 30 is mounted only on the outer side of the power receiving coil 13 on the IC card 8 side as in the IC card system. By the way, each coil 2 is moved from the card reader / writer 19 side to the IC card 8 side without mounting the magnetic body 30.
The transfer efficiency of the electric power transferred through 0 and 13 was about 50%.

By the way, in the case of the IC card systems of the seventh and eighth embodiments, since the power receiving coil 13 is connected to the power control unit 11 and the storage battery 28, the power control unit 11
Manages charge and discharge and can use electric power efficiently,
It was found that the volatile memory can be used for a long time by incorporating the electric storage device 28. Further, in the IC card system of the seventh and eighth embodiments, the feeding coil 20 is connected to the card reader / writer 1.
Although the example installed in 9 has been described, a charging stand for charging is provided as another fixing device exclusively for power supply, and the feeding coil 20 is housed inside the predetermined position where the IC card 8 is placed on this charging stand. However, there is a configuration in which charging is performed from a commercial power source through a power control device as needed. In this case, the expensive card reader / writer 19 can be used for other functions by placing the IC card 8 on the charging stand and charging it.

In any of the IC card systems of Embodiments 7 and 8, since the electrical contacts of the IC card 8 and the card reader / writer are not exposed, there is no fear of failure due to contact failure and safe use is possible.

(Ninth Embodiment) In a ninth embodiment, a mobile unit including a mobile device including an output side portion and a power storage unit connected to the output side portion of a cordless power station, an input side portion, and a power feeding portion connected to the input side portion. And a stationary machine having a stationary device including the above.

As shown by the solid line in FIG. 14, this portable telephone system has an antenna 34 and a terminal device 3 for a mobile device.
3, a mobile device 32 including a power storage control unit 35 that controls charging and discharging of a built-in power storage device such as an alkaline secondary battery, and a power receiving coil 38 used as an output side (secondary side) portion of a cordless power station, and an antenna 42, terminal device 4 for stationary machine connected to signal line 44
1, a power supply control unit 46 as a power supply unit connected to the power supply line 45, and a power supply coil 39 used as an input side (primary side) portion in a cordless power station
And a stationary machine 43 having a.

Here, the stationary machine 43 uses the lines 44 and 45.
Is fixed so as to be movable within the range of the cable length, the feeding coil 39 is connected to the power supply controller 46, and the stationary machine 3 near the surface where the mobile machine 32 is mounted.
A magnetic body 40 made of a soft magnetic ferrite material is attached to the outside of the housing 2 and insulated from the outside. If necessary, the power supply control unit 46 is used for the stationary device terminal device 4.
1 can also be supplied with power. A dial device, a display device, and the like are incorporated in the mobile terminal device 33, which is a transmission / reception terminal, and a handset and a fixed device 43 are provided.
An antenna 34 is attached to communicate with
The mobile device terminal device 33 operates by receiving power supply from the power storage device of the power storage control unit 35 incorporated in the mobile device 32. When the mobile device 32 is mounted on the stationary device 43, the power receiving coil 38 is housed near the inside surface of the mobile device 32 in contact with the stationary device 43 in an insulated state from the outside and connected to the power storage control unit 35. ing. The power receiving coil 38 and the power feeding coil 39 are
When the mobile device 32 is placed at a predetermined position of the stationary device 43, the mobile devices 32 are arranged so as to face each other at a predetermined distance, and mutual guidance is performed efficiently.

That is, in this portable telephone system, the power storage control unit 35 and the power supply control unit 46 accommodate circuits for controlling rectification, charging / discharging, etc., and in the power storage control unit 35, the voltage from the power receiving coil 38 and the power storage device are used. The voltage of is detected and compared,
When the voltage from the power storage device is lower than the predetermined value and the voltage from the power receiving coil 38 is equal to or higher than the predetermined value, the power is received and the mobile device terminal device 33 is also supplied with power.

In the portable telephone system of the ninth embodiment, the feeding coil 39 and the receiving coil 38 have an outer diameter of 30 m.
m, the inner diameter is 15 mm, and the outer surface of each coil is entirely covered with an insulating resin with a thickness of about 0.5 mm so that a distance of about 1 mm is maintained when the coils are coaxially close to each other. ing. Further, when an alternating current of 100 kHz, 5V is applied to the power feeding coil 39 as a power source and the mobile unit 32 is placed at a predetermined position of the stationary unit 43, the power storage unit of the power storage control unit 35 can be stably charged and when it is carried. It turns out that I can call normally.

(Embodiment 10) In Embodiment 10, as shown by a broken line in FIG. 14, a power receiving coil 38 and a power feeding coil 39.
To detect the presence of the counterpart of the mobile unit 32 and the stationary unit 43 in the storage control unit 35 and the power supply control unit 46, respectively. A mobile phone system having the same configuration as that of the ninth embodiment except that the sensors 36 and 37 of FIG. Incidentally, the power receiving coil 38 and the power feeding coil 39 here are also housed with their surfaces covered with an insulating resin,
The magnetic substance 30 has a magnetic permeability of about 1000 at 100 kHz.

This portable telephone system operates similarly to that of the ninth embodiment, but when the mobile unit 32 moves from a predetermined position, the control circuit of the power storage control unit 35 is generated by the detection signal from the sensor 36. Then, the power receiving coil 38 is released, and power is supplied from the power storage device to the mobile device terminal device 33 to manage consumption of the power storage device. At this time, the stationary machine 43 releases the power feeding coil 39.

Also in the portable telephone system of the tenth embodiment, when AC of 5 V is applied to the power feeding coil 39 at 100 kHz and the mobile unit 32 is placed at a predetermined position of the stationary unit 43, the power storage unit 35 has a power storage unit. It turned out that it is possible to receive power stably and to make normal calls when carrying it. Also, in this portable telephone system, the coils 38, 3 are used as power sources from the fixed machine 43 side to the mobile machine 32 side.
The transfer efficiency of the electric power transferred through 9 is about 75%,
It was found that the improvement is about 70% of the case where the magnetic body 40 is attached only to the outer side portion of the power receiving coil 38 as in the ninth embodiment.

In any of the portable telephone systems of the ninth and tenth embodiments, since the electrical contacts are not exposed, the portable telephone system can be safely used without fear of failure due to poor contact.

[0113]

As described above, according to the cordless power station of the present invention, with respect to the electromagnetic induction action generated between the coils facing each other through the air gap, the soft magnetic device mounted on at least the outside of the output side portion of the coil. Since the magnetic flux leakage is prevented by the material portion, the transmission power and the conversion efficiency are remarkably improved. As a result, the cordless power station and the non-contact type signal transmission device having a configuration in which the input side (primary side) of the opposing coil is connected to the signal source can be significantly thinned, and can be effectively applied in various fields. However, if it is used as a power supply means for the drive device of the artificial heart, a stable power supply can be performed, which is unprecedented, and it is extremely useful in industry.

Further, particularly when the noncontact signal transmission device of the present invention is used to construct a body function recovery device by the embedded electrode method in the field of functional electrical stimulation, the space of the portion embedded in the body of the noncontact signal transmission device. And the transmission power and conversion efficiency of cordless electric signals are significantly improved, so that the patient's activity range is not restricted,
Hygiene management will be much less than before.

Further, in the cordless power station, a moving device including an output side (secondary side) portion and a power storage unit connected thereto, and an input side (primary side) portion and a power feeding unit connected thereto are included. Since the fixed device constitutes a cordless power station system that supplies power from the power feeding part of the fixed device to the power storage part of the mobile device,
Applications in various fields are possible.

For example, an IC card system in which a mobile device is provided in an IC card and a fixed device is provided in a card reader / writer, and a portable telephone system including a mobile device provided with the mobile device and a fixed device provided with the fixed device is provided. Then IC
The power receiving coil on the output side (secondary side) of the card or the mobile unit and the power feeding coil on the input side (primary side) of the card reader / writer or the fixed unit are structurally formed separately, and are not placed at predetermined positions during use. By placing them close to each other in a contact state, the power receiving coil and the power feeding coil are in a mutual induction state to supply power between the moving device and the stationary device, and the electrical connection in each of these parts is made by the conventional mechanical connection. The contactless structure results in a non-contact type structure.

Therefore, in the IC card system and the portable telephone system, electric power can be supplied from the fixed device to the mobile device without having mechanical contacts, and charging can be turned on / off by moving the coils closer or farther apart. Like As a result, a structure that does not need to expose the electrical contact part is realized, there is no concern about the generation of sparks or electrical noise due to opening and closing, and the contact part does not directly touch the outside air, so the contact part is not corroded or contaminated. There is no fear of charging failure due to the above, and even when the mobile device is used after being stored for a long period of time, the mobile device is constantly and reliably charged while it is moored to the stationary device, so that it can be used in a constantly charged state when necessary. Furthermore, in the mobile phone system, by disposing sensors capable of detecting the presence of each other in the mobile device and the fixed device, it is possible to efficiently supply and manage power to the mobile device.

[Brief description of drawings]

FIG. 1 shows a basic configuration of a planar spiral coil provided in a cordless power station of the present invention.

FIG. 2 is a perspective view showing a basic configuration according to an example of a cordless power station of the present invention.

FIG. 3 is a perspective view showing a basic configuration according to another example of the cordless power station of the present invention.

FIG. 4 is a perspective view showing a basic configuration according to another example of the cordless power station of the present invention.

FIG. 5 is a perspective view showing a basic configuration according to still another example of the cordless power station of the present invention.

FIG. 6 shows the results of measuring the power conversion efficiency and the secondary output by varying the secondary current for various cordless power stations manufactured in Example 2 of the present invention. Indicates the secondary side current-conversion efficiency characteristic,
(B) shows the secondary current-conversion efficiency characteristic.

FIG. 7 shows the results of measuring the power conversion efficiency and the secondary output of the various non-contact signal transmission devices manufactured in Example 2 of the present invention by varying the secondary current. .

FIG. 8 is an equivalent circuit diagram of an air-core non-contact signal transmission device manufactured in Example 2 of the present invention.

FIG. 9 shows the results of measuring the power conversion efficiency with respect to the thickness of the ferrite disk for various cordless power stations manufactured by changing the thickness of the ferrite disk in Example 4 of the present invention. .

FIG. 10 shows various non-contact type signal transmission devices manufactured by changing the thickness of the ferrite disk in Example 4 of the present invention.
It shows the result of measuring the power conversion efficiency with respect to the thickness of the ferrite disk.

FIG. 11 shows a basic configuration of a body function recovery device manufactured using a non-contact type signal transmission device according to a sixth embodiment of the present invention.

FIG. 12 is a perspective view showing a part of the basic structure of an IC card in the IC card system described in Embodiment 7 of the present invention.

FIG. 13 is a perspective view partially showing a state in which an IC card in the IC card system described in Embodiment 8 of the present invention is inserted into a card reader / writer.

FIG. 14 is a side view showing a part of the basic configurations of a mobile device and a fixed device in the mobile phone system described in Embodiments 9 and 10 of the present invention.

FIG. 15 is a perspective view showing a part of the basic configuration of an IC card in a conventional IC card system in a partially see-through manner.

FIG. 16 is a side view showing a part of the basic configurations of a mobile device and a stationary device in a conventional mobile phone system.

[Explanation of symbols]

1, 1a, 1b, 1 ', 1a', 1b 'Soft magnetic ferrite plate 2, 2a, 2b, 2a', 2b 'Planar spiral coil 3 Lead wire 4 Amplifying part 4a Lead part 5 Signal source part 6 Skin 7 Nerve 7a Rupture part 8 IC card 9 IC module 10 Case 11 Power control unit 12, 21, 34, 42 Antenna 13, 38 Power receiving coil 14, 15, 16, 17, 18, 25, 26, 27 Lead wire 19 IC card reader / writer 20, 39 Power feeding coil 22 Signal control unit 23 (for signal input / output) contact terminal 24 (for receiving power) 28 storage battery 29, 35 storage control unit 30, 40 magnetic material 31 power supply unit 32 mobile unit 33 (movement) Terminal device 36, 37 Sensor 41 (For fixed device) Terminal device 43 Fixed device 44 Signal line 45 Power line 46 Power control unit 47 Contact terminal (for power supply) 48 Contact terminal (for power reception)

Claims (16)

[Claims] 1. In a cordless power station, which includes coils facing each other through an air gap, and which transmits electric power in a contactless manner by utilizing an electromagnetic induction effect generated between the coils facing each other, the coils facing each other include an output side portion and an output side portion. A cordless power station including a soft magnetic material portion including an input side portion and at least an outer side portion of the output side portion. 2. The cordless power station according to claim 1, wherein a capacitor is inserted in the output side portion. 3. The cordless power station according to claim 1, wherein the opposing coils are plane spiral coils and the soft magnetic material portion is a soft magnetic ferrite plate. 4. The cordless power station according to claim 3, wherein the soft magnetic ferrite plates are attached to outer portions of the input side portion and the output side portion, respectively. 5. The cordless power station according to claim 1, wherein the facing coils are formed of a plurality of facing pairs by connecting a plurality of planar spiral coils, and each of the input side part and the output side. Including parts,
The cordless power station, wherein the soft magnetic material portion is a soft magnetic ferrite plate, and the soft magnetic ferrite plate is attached to at least an outer portion of the output side portion. 6. The cordless power station according to claim 5, wherein adjacent ones of the flat spiral type coils formed of the plurality of facing groups are connected so that magnetic flux directions thereof are opposite to each other. A cordless power station characterized by that. 7. The cordless power station according to claim 5, wherein the soft magnetic ferrite plate is attached to an outer side portion of each of the input side portion and the output side portion. 8. The cordless power station according to claim 3, wherein the soft magnetic ferrite plate has a thickness in the range of 0.1 to 5.0 [mm]. Cordless power station to do. 9. The cordless power station according to claim 1, wherein the input side portion is connected to a signal source. 10. The non-contact signal transmission device according to claim 9, and an electric signal obtained by electromagnetic induction of the non-contact type signal transmission device, which is connected to the output side portion and the nerve, to the nerve. A body function recovery device comprising: a conductive nerve connecting member for transmission. 11. The cordless power station according to claim 1, further comprising an output side portion and a power storage unit connected to the output side portion, the input side portion and the input side portion. A mobile device, wherein power is supplied from the power supply unit to the power storage unit between the power storage unit and a fixed device connected to the power supply unit. 12. The cordless power station according to claim 1, further comprising an input side portion and a power feeding portion connected to the input side portion, the output side portion and the output side portion. A fixed device characterized in that power can be supplied from the power feeding unit to the power storage unit with a mobile device including a power storage unit connected to the power storage unit. 13. An IC including the moving device according to claim 11.
An IC card system comprising a card and a card reader / writer including the fixing device according to claim 12. 14. The IC card system according to claim 13, wherein the capacitor is connected to at least a power control unit that controls power supply. 15. A mobile phone system comprising a mobile device including the mobile device according to claim 11 and a stationary device including the stationary device according to claim 12. 16. The mobile phone system according to claim 15, wherein the mobile device includes a power storage control unit that controls charging and discharging of the power storage unit, and the stationary device includes a power supply control unit that serves as the power supply unit. A mobile phone system, wherein a sensor for detecting the presence of a counterpart in the mobile unit or the fixed unit is connected to each of the power storage control unit and the power supply control unit.