JP2003205040A - Magnetic flux radiation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic flux radiation apparatus with which the magnetic flux of a high density can be efficiently concentrated to a magneto- sensitive heating element in a biopsy sample without need of a circuit to have high voltage. <P>SOLUTION: The magnetic flux radiation apparatus has a solenoid coil 11a and a magnetic core 11b inserted thereto and composed of a ferrite. The solenoid coil 11a is equipped with a basic winding part 11aa wound on the inner peripheral side approximately over the full length of an operation part 11 and a reinforced winding part 11ab wound insides over a short block on the side of an operating terminal 11z. In the operating terminal 11z, magnetic flux generated by the reinforced winding part 11ab is added to magnetic flux generated by the basic winding part 11aa and magnetic flux 12 having a strong magnetic field is efficiently generated. Therefore, the reinforcement of radiation magnetic flux which can not be realized by extending the length of the operation part 11 can be realized by magnetic flux adding operation by the magnetic field of the reinforced winding part 11ab, and the biopsy sample is irradiated with the magnetic flux 12 of the high density. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic flux irradiating device for generating a magnetic flux using a solenoid coil and irradiating a subject with the magnetic flux.

[0002]

2. Description of the Related Art Conventionally, as a magnetic flux irradiator of this type,
For example, there is one used in a living body interior heating device used for local hyperthermia (hyperthermia method). One method of this hyperthermia method is disclosed in JP-A-11-57.
As disclosed in Japanese Patent Publication No. 031, a magnetically sensitive heating element containing iron-based oxide fine particles as a main component is introduced into a diseased part of a living body, and a magnetic flux irradiating device irradiates the magnetically sensitive heating element with magnetic flux. The magnetically sensitive heating element causes a magnetic hysteresis loss due to the applied magnetic flux, and the affected area is locally heated by the magnetic hysteresis loss. This heating is performed at a temperature at which normal cells are not invaded, and only the cancer cells in the affected area are selectively heated and necrosed.

FIG. 1 shows an operating portion 1 of such a magnetic flux irradiation device.
Shows a schematic configuration of. The action part 1 has a solenoid coil 1a and a magnetic core 1b which are transversely arranged with respect to a living body as a subject. When an electric current is applied to the solenoid coil 1a from a drive unit (not shown), the living body is irradiated with the magnetic flux 2 from the working end 1z, and the above-mentioned magnetically sensitive heating element 3 introduced into the living body is heated. The working end 1z functions by filling one end of the working portion 1 in a transverse configuration in which this end faces the living body.

[0004]

Here, it is desirable that the magnetic flux applied to the living body reaches the deep portion with a high magnetic flux density, even if the portion requiring heating is in the deep portion inside the living body.

As a measure for satisfying this requirement, first, in order to increase the density of the magnetic flux 2 output from the working end 1z, the current flowing through the solenoid coil 1a is increased, or the length of the working portion 1 is increased. Solenoid coil 1a
It is conceivable to increase the number of turns. In addition, in order to thicken the output magnetic flux 2, the action portion 1 (solenoid coil 1a
It is also conceivable to increase the effective area of the magnetic core 1b). In this measure, the convection magnetic flux line pattern drawn by the magnetic flux 2 extends to a position far from the working end 1z,
It is also useful for increasing the depth of arrival of the magnetic flux 2 inside the living body.

However, in all of the above three measures, it is necessary to increase the voltage applied to the solenoid coil 1a. This increase in voltage extends from several kV to several tens of kV, which increases the risk of electric shock and further causes an inconvenient dielectric side effect by a strong electric field, which is not preferable.

Further, if each argument is added,
However, there is a limit that the increase in the magnetic flux density reaches the ceiling with the saturation magnetic flux density of the magnetic core 1b. Incidentally, the magnetic core 1b is often used in such a form that it does not have a large margin up to the saturation magnetic flux density, so that a large improvement amount (improvement) of the magnetic flux density cannot be expected as a whole.

Measures for increasing the length of the action part 1 are:
The contribution itself to the improvement of the output magnetic flux density is small. This is because the portion where the number of turns of the solenoid coil 1a is added exists at the end opposite to the working end 1z, and the magnetic field at this portion is the magnetic field strength due to the large magnetic resistance between the working end 1z. Only in the form that is significantly weakened after descending, the working end 1z
This is because it cannot contribute to the increase in the output.

In addition, since the measure (1) is accompanied by an increase in the circuit impedance that does not contribute to heating, there is a problem that the power loss rate becomes large and the heating efficiency cannot be improved for the required amount of power. In addition, the measure (1) is the most useful of the above three measures because the saturation magnetic flux amount increases due to the increase in the cross-sectional area, but it is used in applications where local concentration of magnetic flux is particularly desired. For the purpose, increasing the magnetic flux thickness may be inconvenient.

The increase in the voltage applied to the coil and the power loss rate described above leads to an increase in the size of the drive section for supplying a current to the action section 1, and the portability, operability, and economical efficiency of the entire magnetic flux irradiation apparatus. Will be a negative factor to reduce.

The present invention has been made in view of the above circumstances, and a magnetic flux is generated using a solenoid coil,
Regarding the magnetic flux irradiating device for irradiating this magnetic flux to the object, the high magnetic flux to the deep part of the object without the requirement of increasing the voltage applied to the coil or with the increase of the power loss rate. It meets the demand for reaching a magnetic flux of high density.

[0012]

In order to meet this demand, the present invention comprises an operating portion having a solenoid coil and a magnetic core inserted therein, and a drive portion for supplying a current to the solenoid coil to generate a magnetic flux. In a magnetic flux irradiating device in which a magnetic flux is radiated to an object from an operating end that fills one end of the operating part to function, a solenoid coil is wound on the inner peripheral side and over substantially the entire length of the operating part. Basic winding part,
A reinforcing winding portion wound outside the wire and over a short section on the working end side is provided.

According to this structure, the strengthening of the irradiation magnetic flux, which cannot be achieved by increasing the length of the working portion, is arranged near the working end, and the magnetic field strength of the reinforcing winding portion in the magnetic circuit is little attenuated. The magnetic flux having a high density is radiated to the object to be irradiated by the magnetic flux adding action of the.

Further, the present invention is characterized in that the solenoid coil is provided with a magnetic flux control winding portion formed so as to project around the working end.

According to this structure, the magnetic flux is generated around the working end by the magnetic flux control winding portion, and the magnetic flux generated at the central portion of the shaft of the solenoid is affected by the magnetic flux generated by the protruding portion, and is further expanded from the working end. Form magnetic field lines that draw an arc at a distant point. That is, the magnetic flux generated in the central portion of the solenoid shaft reaches and is distributed farther from the working end due to the magnetic flux control effect of the magnetic flux control winding portion.

Further, according to the present invention, the acting portion is composed of a plurality of unit acting portions having uniform polarities, and each unit acting portion has its axis gathered in a centripetal manner on the side of the subject to thereby reduce the magnetic flux density. It is characterized by being coordinated so as to be added and strengthened.

According to this structure, the magnetic flux to which the respective magnetic fluxes generated in each of the plurality of unit action parts are added is applied to the subject,
A magnetic flux having an increased density or thickness is applied to the object as compared with the case where the magnetic flux generated in one unit acting portion is applied.

Further, the present invention is characterized in that the operating portion is provided with a magnetic flux control winding portion formed so as to project around the enveloped peripheral edge of the operating end group belonging to the plurality of unit operating portions. To do.

According to this structure, the magnetic flux is generated by the magnetic flux control winding portion swelling around the outer periphery of the operating ends of the plurality of unit operating portions, and the magnetic fluxes of the respective solenoids that are added and strengthened are generated. Under the influence of the magnetic flux, a magnetic field line is formed which draws an arc at a point farther from each working end. That is, the magnetic fluxes of the respective solenoids, which add and reinforce each other, reach the points farther from the respective working ends and are distributed.

Further, the present invention is characterized in that the magnetic flux control winding portion is formed of a conductive wire having flexibility.

According to this structure, by flexing the shape of the magnetic flux control winding portion in accordance with the shape of the object to be irradiated, the distribution of magnetic flux generated in the magnetic flux control winding portion can be further enhanced. Can be changed appropriately.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a first embodiment in which the magnetic flux irradiating apparatus according to the present invention is applied to a living body interior heating apparatus will be described.

The magnetic flux irradiation device according to the present embodiment is shown in FIG.
The action part 11 shown in (a) and the drive part 2 shown in FIG.
1 and 1.

The acting portion 11 shown in FIG. 3A has a solenoid coil 11a and a magnetic core 11b made of ferrite inserted therein. The solenoid coil 11a is
A basic winding portion 11aa wound on the inner peripheral side over substantially the entire length of the acting portion 11, and a reinforcing winding portion 11ab wound on the outside thereof and over a short section on the acting end 11z side. Is equipped with. The working end 11z is filled with one end of the working portion 11 in such a manner that it is transversely coordinated to the object to be operated. The magnetic flux 12 generated at the working end 11z of the solenoid coil 11a is applied to the living body, which is the subject, and reaches the magnetically sensitive heating element 13 introduced into the living body. Magnetic heating element 13
Is mainly composed of iron oxide fine particles having a relative magnetic permeability of 100 to 2000, and the average particle diameter of the fine particles is 10 to 1
It is 00 [nm].

The drive unit 21 shown in FIG.
Power is supplied from an AC power supply 22 that generates 0 [V], and this AC 200 [V] is pulsated by the rectifier 23 to be 200 [V].
Convert to. The converted pulsating flow of 200 [V] is stored in the condenser 24.
Is smoothed by the oscillating device 25 and converted into a rectangular wave AC 250 [V] by the oscillator 25. A capacitor 26 is provided on the output side of the oscillator 25, and the solenoid coil 11a is connected to the output terminals 21a and 21b of the drive unit 21.
Is connected, the capacitor 26 and the solenoid coil 1 are connected.
A resonant circuit is formed by 1a. Due to the resonance of this resonance circuit, 50 to 400 is applied to the solenoid coil 11a.
A high-frequency current having a frequency of [kHz] flows, and a magnetic flux 12 is generated at the working end 11z.

In this structure, the working end 1 of the working portion 11
When 1z is placed facing the chest or abdomen of the living body,
The magnetic flux 12 generated at the working end 11z is applied to the magnetosensitive heating element 13 in the living body. Magnetically sensitive heating element 13 emits magnetic flux 1
2 causes a magnetic hysteresis loss, and the affected area is heated by this magnetic hysteresis loss. On the other hand, since the living body has good conductivity, an eddy current is generated in the surrounding living body in which the magnetosensitive heating element 13 is arranged, and Joule heat is generated. However, since the formation of the AC magnetic flux 12 having the above-mentioned frequency is concentrated in the region where the magnetically sensitive heating element 13 is arranged, the heat generation due to the hysteresis loss of the magnetically sensitive heating element 13 itself increases, and under the influence thereof, it occurs in the surrounding living body. Heat generation due to Joule loss is suppressed. As a result, a sharp temperature distribution is formed centering on the arrangement area of the magnetosensitive heating element 13, and normal cells are not invaded by heating but only the cancer cells in the affected area are selectively heated and necrosed.

From the working end 11z of the working portion 11 of the magnetic flux irradiating device according to the first embodiment, in the graph of FIG. 2 (c), the output magnetic flux of the sum of the magnetic fluxes derived from the respective portions of the solenoid coil 11a is calculated. The magnetic flux whose density is represented by the characteristic line z is output. The horizontal axis of the graph represents the distance L from the working end 11z of the unit winding (one winding) of the solenoid coil 11a, and the vertical axis of the graph represents the magnetic flux density B of the magnetic flux output from the working end 11z. There is. The characteristic line z is obtained by synthesizing the characteristic line x representing the output magnetic flux derived from the basic winding portion 11aa and the characteristic line y representing the output magnetic flux originating from the reinforcing winding portion 11ab. Working unit 1 having such characteristics
According to 1, the magnetic flux generated by the reinforcing winding portion 11ab is added to the magnetic flux generated by the basic winding portion 11aa at the working end 11z of the acting portion 11, and the magnetic flux 1 having a strong magnetic field is generated.
2 can be efficiently generated.

Therefore, the strengthening of the irradiation magnetic flux, which cannot be achieved by increasing the length of the action portion 11, is caused by the magnetic field of the reinforcing winding portion 11ab which is arranged near the action end 11z and has little attenuation of the magnetic field strength in the magnetic circuit. The living body is irradiated with the high-density magnetic flux 12 which is fulfilled by the magnetic flux addition action.

Therefore, according to the magnetic flux irradiating apparatus of the first embodiment, the high density magnetic flux 12 can be efficiently generated in the living body without generating a high voltage in the resonance circuit of the drive section 21. The magnetic flux can be concentrated on the magnetosensitive heating element 13, and the effective depth of the magnetic flux 12 applied to the living body (the depth at which the magnetic flux having an effective magnetic flux density acts) can be increased. In addition, since the action portion 11 does not need to be enlarged in size by increasing its effective length or increasing its cross-sectional area, increase in circuit impedance that does not contribute to heating is suppressed, and increase in power loss rate is prevented. Can be done. further,
Since the portability of the action part 11 is not impaired, the action end 11 can be easily applied to a living body part such as the chest or abdomen that requires heating.
z can be arranged.

Next, a second embodiment in which the magnetic flux irradiating device according to the present invention is applied to a living body interior heating device will be described.

The magnetic flux irradiating device according to the second embodiment comprises an operating portion 31 shown in FIG. 3 (a) and a driving portion 21 shown in FIG. 2 (b). The magnetic flux irradiating device of FIG. In FIG. 3, parts that are the same as or correspond to those in FIG. 2A are assigned the same reference numerals and explanations thereof are omitted.

The action portion 31 according to the second embodiment is formed by surrounding the solenoid coil 31a at the action end 31z with a magnetic flux control winding portion 31b, which is shaded in the figure, protruding. The magnetic flux control winding portion 31b is formed by winding the winding of the solenoid coil 31a so as to project around the working end 31z, and the solenoid coil 31a including the magnetic flux control winding portion 31b is formed from one conductor wire. Has been formed. The magnetic flux control winding portion 31b is formed by a winding different from the solenoid coil 31a, and
The same phase current may be applied to the solenoid coil 31a and the solenoid coil 31a.

In the magnetic flux irradiating device according to the second embodiment having such an action portion 31, a magnetic flux 33 is generated by the magnetic flux control winding portion 31b so as to project around the action end 31z as shown by a dotted line in the figure, and the solenoid The magnetic flux 32 generated in the axial center portion of the coil 31a is affected by the magnetic flux 33 generated by the protrusion, and forms a magnetic force line that draws an arc at a position farther from the working end 31z. That is, the magnetic flux 32 generated at the axial center of the solenoid coil 31a reaches and is distributed farther from the working end 31z due to the magnetic flux control effect of the magnetic flux control winding portion 31b.

Therefore, even with the magnetic flux irradiating device according to the second embodiment described above, it is not necessary to increase the voltage of the resonance circuit, and moreover, the magnetic flux 32 having a high density can be efficiently and efficiently supplied to the magnetosensitive heating element 13 in the living body. The magnetic flux 32 can be concentrated and the effective depth of the magnetic flux 32 applied to the living body can be further increased. Further, also in the second embodiment, since it is not necessary to increase the size of the action portion 31, it is possible to suppress an increase in circuit impedance that does not contribute to heating and prevent an increase in power loss rate. Furthermore, since the portability of the action part 31 is not impaired, the action end 31z can be easily arranged at each part of the living body that requires heating.

Next, a third embodiment in which the magnetic flux irradiating device according to the present invention is applied to a living body interior heating device will be described.

The magnetic flux irradiating device according to the third embodiment comprises an operating portion 41 shown in FIG. 3 (b) and a driving portion 21 shown in FIG. 2 (b). The magnetic flux irradiating device of FIG.

The action portion 41 according to the third embodiment is formed by a magnetic flux control winding portion 41b, which is shaded in the figure, projecting around the solenoid coil 41a at the action end 41z. It is similar to the operating portion 31 of the second embodiment, but is different from the operating portion 31 of the second embodiment in that the magnetic flux control winding 41b is formed of a flexible conductive wire. In the third embodiment, the winding of the solenoid coil 41a is also formed of a flexible conductor wire,
In the magnetic flux control winding portion 41b, this flexible conductor wire is used as the working end 41.
It is formed by projecting and winding around z.
Alternatively, only the magnetic flux control winding portion 41b may be formed of a flexible conductive wire and connected so as to be connected in series with the conductive wire of the solenoid coil 41a. Alternatively, the magnetic flux control winding portion 41b may be formed of a flexible conductor different from the solenoid coil 41a, and a current of the same phase may flow through the magnetic flux control winding portion 41b and the solenoid coil 41a.

In the magnetic flux irradiating device according to the third embodiment, which is composed of the acting portion 41 as described above, the shape of the magnetic flux control winding portion 41b is bent as shown in FIG. The distribution of the magnetic flux generated in the magnetic flux control winding portion 41b can be appropriately changed so that the magnetic flux control effect of the magnetic flux control winding portion 41b is further enhanced. Therefore, the solenoid coil 41a is affected by the distribution of the magnetic flux.
The distribution of the magnetic flux 42 that is generated in the center of the axis and is applied to the living body 14 is made to reach a point farther from the working end 41z by changing the shape of the magnetic flux control winding portion 41b.
Moreover, it can be distributed in an optimum desired state according to the situation of the living body 14. Therefore, according to the magnetic flux irradiation device of the third embodiment, not only the function and effect of the second embodiment described above can be obtained, but also the optimum magnetic flux can be appropriately irradiated depending on the condition of the affected area. become.

Next, a fourth embodiment in which the magnetic flux irradiating device according to the present invention is applied to a living body interior heating device will be described.

The magnetic flux irradiating device according to the fourth embodiment is composed of an operating portion composed of two unit operating portions 51 and 52 shown in FIG. 3 (c) and a drive portion 21 shown in FIG. 2 (b). Therefore, only the configuration of the drive unit 21 is common to the magnetic flux irradiation apparatus according to the first embodiment described above. In the present embodiment, for the sake of convenience of illustration, two action units 51,
Although it is composed of 52, in actuality, when the action portion is made up of about 3 or 4 unit action portions, the action end of each unit action portion is arranged along the outer surface of the three-dimensional object. Is preferred.

In the magnetic flux irradiation device according to the fourth embodiment,
As shown in FIG. 3C, the two unit action parts 51 and 52 are arranged such that their action ends are close to each other, and the axis of the solenoid coil forming each unit action part 51 and 52 is located on the side of the subject. They are arranged in a centripetal manner so that the magnetic flux density is added and strengthened. Further, in the fourth embodiment, the magnetic flux control winding portion 53 is formed so as to project around the outer periphery that encloses each of the leaning action ends. In this fourth embodiment,
The solenoid coil and the magnetic flux control winding portion 53 of each unit acting portion 51, 52 are connected in series so that the phases of the magnetic fields generated by them are aligned, and are connected to the driving portion 21 to be energized. Therefore, the magnetic fluxes of the same phase are uniformly output to the action ends of the respective unit action portions 51 and 52, and these are merged by the magnetically sensitive heating element 13 in the living body to be added and strengthened. That is, according to the fourth embodiment, it is possible to perform the heating while focusing on a specific part of the living body.

As described above, even in the present embodiment, it is not necessary to increase the voltage of the circuit, and moreover, it is possible to efficiently concentrate the high-density magnetic fluxes 54 and 55 on the magnetosensitive heating element 13 in the living body. And the magnetic flux 54 that irradiates the living body,
The concentration of 55 can be improved also in the depth direction.

Further, in the present embodiment, the magnetic flux control winding section 5
The magnetic fluxes 56 and 55 of the unit action parts 51 and 52, which are added and reinforce each other, are generated by the magnetic flux 56 shown by a dotted line in the figure projecting around the outer periphery enclosing the action ends of the unit action parts 51 and 52 by 3.
Under the influence of the magnetic flux 56 generated by the overhang, magnetic force lines that form an arc are formed at points farther from the respective action ends of the unit action portions 51 and 52. That is, the magnetic fluxes 54 and 55 of the unit action portions 51 and 52 that add and reinforce each other reach the points farther from the respective action ends and are distributed.

Therefore, the magnetic flux irradiating apparatus according to the fourth embodiment having the magnetic flux controlling winding portion 53 can further increase the effective depth of the magnetic fluxes 54 and 55 applied to the living body. In addition, in the fourth embodiment, when the magnetic flux control winding portion 53 is formed of a flexible conductive wire,
The same effect as that of the above-described third embodiment is obtained.
In addition, although it has the plurality of unit action parts 51 and 52,
A configuration not provided with the magnetic flux control winding section 53 is also useful according to the use and purpose.

Further, a magnetic flux irradiating device can be constructed by appropriately combining the above-mentioned respective embodiments.

For example, in the magnetic flux irradiating device according to the first embodiment, the operating portion of which is shown in FIG. 2A, the solenoid coil 11a having the basic winding portion 11aa and the reinforcing winding portion 11ab is further provided in FIG. It can be configured to include the magnetic flux control winding portion 31b in the second embodiment in which the acting portion 31 is shown in a). Also, in this case, FIG.
As in the third embodiment in which the action portion 41 is shown in (b), the magnetic flux control winding portion 31b can be a flexible magnetic flux control winding portion 41b. Further, in the magnetic flux irradiating device according to the fourth embodiment in which the operating portion is shown in FIG. 3C, the plurality of unit operating portions 51 and 52 are basically the same as the operating portion 11 of the first embodiment. The solenoid coil 11a may include a winding portion 11aa and a reinforcing winding portion 11ab.

According to such respective configurations, the actions and effects of the combined configurations are synergistically generated, and a magnetic flux generating effect higher than the effect obtained in the above-described respective embodiments alone is exerted. A magnetic flux irradiation device is realized.

In each of the above-described embodiments, the case where the magnetic flux irradiating device according to the present invention is applied to the living body interior heating device to irradiate the living body with magnetic flux is described, but the present invention is not limited to this. . For example, it can be similarly applied to the case of irradiating magnetic flux to an object such as a metal to heat the metal or the like, and in this case, the same effect as that of each of the above-described embodiments can be obtained.

[0049]

As described above, according to the present invention, the working portion has the basic winding portion wound on the inner peripheral side and over substantially the entire length of the working portion, and on the outer side and the working end side. In the case of a solenoid coil having a reinforcing winding part wound over a short section of, the strengthening of the irradiation magnetic flux, which could not be achieved by increasing the length of the operating part, is arranged near the operating end. Then, the attenuation of the magnetic field strength in the magnetic circuit is reduced, and the magnetic field is added by the magnetic field of the reinforcing winding portion, and the dense magnetic flux is applied to the object.

Therefore, it is not necessary to increase the voltage of the circuit,
Moreover, the magnetic flux having a high density can be efficiently concentrated in the subject, and the effective depth of the magnetic flux applied to the subject can be increased. Further, since it is not necessary to increase the size of the acting portion and the increase of the circuit impedance that does not contribute to heating is suppressed, it is possible to prevent the increase of the power loss rate. Furthermore, since the portability of the action part is not impaired,
The working end can be easily arranged at a desired position on the subject.

Further, in the case where the solenoid coil is provided with the magnetic flux control winding portion formed to project around the working end, the magnetic flux control winding portion causes the magnetic flux to project around the working end. The magnetic flux generated in the central part of the solenoid shaft reaches and is distributed farther from the working end. Therefore, even with this configuration, it is possible to efficiently concentrate the high-density magnetic flux in the object without increasing the voltage of the circuit, and further, to increase the effective depth of the magnetic flux applied to the object. Can be further increased. Also,
It is possible to prevent an increase in the power loss rate, and further it is possible to easily arrange the working end at a desired position on the subject.

Further, the acting portion is composed of a plurality of unit acting portions having uniform polarities, and the axis lines of each unit acting portion are gathered in a centripetal manner on the side of the object to add and strengthen the magnetic flux density. In the case of such a configuration, the magnetic flux generated in each unit action portion of the plurality of groups is applied to the irradiation target, and the density or The magnetic flux with the increased thickness is applied to the object. Therefore, even with this configuration, it is possible to efficiently concentrate the high-density magnetic flux in the object without increasing the voltage of the circuit, and further, to increase the effective depth of the magnetic flux applied to the object. Can be increased.

Further, in the case of a structure in which the operating portion is provided with a magnetic flux control winding portion formed so as to project around the enveloping peripheral edge of the operating end group belonging to a plurality of unit operating portions, the magnetic flux control is performed. The magnetic flux of the solenoids is generated by the winding portion swelling around the outer circumference of each working end of the plurality of unit working portions, and the magnetic fluxes of the respective solenoids, which add and reinforce each other, reach a point farther from each working end and are distributed. Therefore, according to this configuration, the effective depth of the magnetic flux with which the subject is irradiated can be further increased.

In the case where the magnetic flux control winding portion is formed of a flexible conductive wire, the shape of the magnetic flux control winding portion is bent in accordance with the shape of the object, The distribution of the magnetic flux generated in the magnetic flux control winding portion can be appropriately changed so that the magnetic flux control effect is further enhanced. Therefore, the magnetic flux applied to the object is distributed in an optimum desired state according to the situation of the object.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a working portion of a conventional magnetic flux irradiation device.

FIG. 2A is a schematic configuration of an action part used in the magnetic flux irradiation device according to the first embodiment of the present invention, and FIG. 2B is used in the magnetic flux irradiation device according to each embodiment of the present invention. It is a figure which shows schematic structure of a drive part, (c) is a graph which shows typically the relationship between the winding position of the transverse type solenoid coil shown to (a), and the magnetic flux density which acts on a working end.

3A is a schematic configuration of a working portion of a magnetic flux irradiation device according to a second embodiment of the present invention, and FIG. 3B is a schematic configuration of a working portion of a magnetic flux irradiation device according to a third embodiment of the present invention; (C)
[Fig. 8] is a diagram showing a schematic configuration of two unit action parts constituting an action part of a magnetic flux irradiator according to a fourth embodiment of the present invention.

[Explanation of symbols]

11, 31, 41 ... Working parts 51, 52 ... Unit working parts 11a, 31a, 41a ... Transverse solenoid coil 11aa ... Basic winding part 11ab ... Reinforcing winding part 11b ... Magnetic cores 11z, 31z, 41z ... Working part 11 , 31, 41 working ends 12, 32, 33, 42, 54, 55, 56 ... Magnetic flux 13 ... Magnetically sensitive heating element 14 ... Living body 21 ... Drive portions 31b, 41b, 53 ... Magnetic flux control winding portion

Claims (8)

[Claims] 1. A functioning part having a solenoid coil and a magnetic core inserted therein, and a drive part for causing a current to flow through the solenoid coil to generate a magnetic flux. One end of the functioning part is filled to function. In the magnetic flux irradiating device in which magnetic flux is radiated from the working end to the object to be radiated, the solenoid coil has a basic winding part wound on the inner peripheral side and over substantially the entire length of the operating part, and on the outside thereof. A magnetic flux irradiating device comprising: a reinforcing winding part wound over a short section on the working end side. 2. A solenoid coil and an action part having a magnetic core inserted therein, and a drive part for causing an electric current to flow through the solenoid coil to generate a magnetic flux, and one end of the action part is filled to function. In the magnetic flux irradiating device in which magnetic flux is radiated from the working end to the object to be radiated, the solenoid coil includes a magnetic flux control winding portion formed to project around the working end. apparatus. 3. A functioning part having a solenoid coil and a magnetic core inserted in the solenoid coil, and a drive part for causing a current to flow through the solenoid coil to generate a magnetic flux. In the magnetic flux irradiating device in which magnetic flux is radiated from the working end to the subject, the acting portion is composed of a plurality of unit acting portions having uniform polarities, and each unit acting portion has an axis line on the subject side. A magnetic flux irradiating device, wherein the magnetic flux irradiating device is arranged so that the magnetic flux densities are gathered in a centripetal manner and the magnetic flux density is added and strengthened. 4. The magnetic flux irradiating device according to claim 1, wherein the solenoid coil includes a magnetic flux control winding portion formed to project around the working end. 5. The solenoid coil of the unit acting portion comprises:
A basic winding portion wound on the inner peripheral side over substantially the entire length of the unit operating portion, and a reinforcing winding portion wound on the outer side thereof over a short section on the operating end side. The magnetic flux irradiation device according to claim 3, wherein 6. The action section includes a magnetic flux control winding section formed so as to project around an envelope peripheral edge of a group of the action ends belonging to the plurality of unit action sections. The magnetic flux irradiating device according to claim 3 or 5. 7. The magnetic flux irradiating apparatus according to claim 2, wherein the magnetic flux control winding portion is formed of a flexible conductive wire. 8. The magnetic flux irradiating device according to claim 1, wherein the subject is a living body.