WO2006115120A1

WO2006115120A1 - Magnetic coil

Info

Publication number: WO2006115120A1
Application number: PCT/JP2006/308120
Authority: WO
Inventors: Kazutomo Yunokuchi
Original assignee: Thoshin Co. Ltd.
Priority date: 2005-04-19
Filing date: 2006-04-18
Publication date: 2006-11-02
Also published as: TW200637627A; JP2006296669A

Abstract

A magnetic coil which can promote recovery of a body function through an arrangement as simple as possible. A pulse magnetic field of 0.1-1.0 [T] is generated by using magnetic coils (12-14) so that muscle fatigue, or the like, of a body can be alleviated. The magnetic coils (12-14) (mat (15)) are permitted to bend by forming the magnetic coils (12-14) by using a thinner wire as compared with a conventional one. Consequently, the magnetic coils (12-14) can be fitted as much as possible to a curved portion such as the shoulder or knee of the body. Recovery of a body function is promoted with the magnetic coils (12-14) having an arrangement as simple as possible.

Description

Specification

Magnetic coil

Technical field

[0001] The present invention relates to a magnetic coil, and is particularly suitable for use in applying a magnetic field to promote the recovery of body functions.

Background art

Conventionally, there is a treatment device that applies a pulsed magnetic field to the body to reduce muscle fatigue and the like. In a conventional magnetic stimulator that works, a very large pulse current of 3000 [A] or more is passed through a magnetic coil placed near the body for a short time (100 [s]), and the value is greater than 1 [T]. A pulsed magnetic field having the following is applied to the body. Then, an eddy current is generated in the body, and the excitable tissue of the body is stimulated by this eddy current.

[0003] As described above, the conventional magnetic stimulation apparatus is intended to stimulate (convulsions) the excitable tissue of the body, and therefore has a force that requires a large current to flow through the magnetic coil. Therefore, it is necessary to form a magnetic coil that is strong and has high insulation strength, as described in Non-Patent Document 1 that can withstand the heat generated by the flow of a large current and mechanical stress. I got. More specifically, for example, a magnetic coil was formed using a copper wire having a diameter of about 2 [mm].

[0004] ^^ Special Reference 1: Sudhansu chokroverty, "Magnetic Stimulation in linicalNeurophysioiogy", Butterworths, p.63

Disclosure of the invention

However, as described above, the conventional magnetic coil has been strong. Therefore, it is difficult to fit the magnetic coil to the body, and there is a problem that it is not easy to make the structure capable of promoting the recovery of the function of the body.

The present invention has been made in view of such problems, and an object of the present invention is to provide a magnetic coil that can realize the recovery of body functions with the simplest possible structure. .

[0006] A magnetic coil of the present invention is used in a magnetic therapy device that applies a magnetic field to a body. And when it is attached to the body, it is characterized in that it fits into the shape of the body.

[0007] According to the present invention, the magnetic coil is configured so as to fit the body, so that the magnetic coil can be fitted to the body as much as possible with the simplest possible structure. The recovery of performance can be promoted as appropriately as possible.

Brief Description of Drawings

FIG. 1 shows an embodiment of the present invention and is a diagram showing an example of a functional configuration of a magnetic stimulation apparatus.

FIG. 2 is a view showing an embodiment of the present invention and showing an example of an external configuration of the magnetic stimulation apparatus.

FIG. 3 is a view showing an embodiment of the present invention and showing an example of attachment of a magnetic stimulation apparatus.

FIG. 4 shows an embodiment of the present invention and is a diagram showing the relationship between the number of test sets composed of exercise load and rest and the muscular strength of the test subject.

FIG. 5 shows an embodiment of the present invention, and is a diagram showing the relationship between the number of test sets consisting of the exercise load and rest and the integrated electromyogram.

FIG. 6 is a view showing an embodiment of the present invention and showing an example of a magnetic coil formed by using a thin plate-shaped electric wire.

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] As described above, the conventional magnetic stimulation apparatus is intended to stimulate (convulsions) the excitable tissue of the body. On the other hand, the present inventors have found for the first time that recovery of body functions (for example, muscle fatigue of the body) can be promoted without stimulating (convulsions) the body's excitable tissue. It was In other words, it was found that the recovery of the body's function can be promoted even if the magnitude of the pulse current flowing through the magnetic coil is made so small that no muscle spasm is observed. It was found that this phenomenon was caused by the application of a pulsed magnetic field to generate ions when eddy currents were generated in the body, and these ions acted on the muscles.

In the following, an embodiment of the present invention will be described on the assumption that the inventors of the present application have found the first time in this way. FIG. 1 is a diagram illustrating an example of a functional configuration of a magnetic stimulation device (magnetic therapy device) in which the magnetic coil of the present embodiment is used. In the following description, the values of current, voltage, and magnetic field indicate peak values.

In FIG. 1, the magnetic stimulation apparatus 10 includes a pulse generator 11 and magnetic coils 12 to 14.

The pulse generator 11 generates a pulse signal and gives it to the magnetic coils 12 to 14.

The pulse generator 11 of the present embodiment includes a pulse generation circuit that generates the pulse signal, a microcomputer, a power switch, and a magnetic field adjustment switch.

[0012] When a user turns on a power switch provided in the noise generating device 11, electric power is supplied to the pulse generating device 11. Then, the microcomputer controls the pulse generation circuit so as to generate a pulse signal having a magnitude that can be set by the magnetic field adjustment switch. Under the control of the microcomputer, the pulse generation circuit generates a pulse signal, the generated pulse signal is applied to the magnetic coils 12 to 14, and the magnetic field of the magnetic coils 12 to 14 generates a pulse magnetic field.

[0013] The magnetic coils 12 to 14 are the same. Each of the magnetic coils 12 to 14 is configured by winding an electric wire (copper wire) having a diameter of 0.1 [mm] 50 times, for example, and has a diameter of about 10 [cm], for example.

As shown in FIG. 1, terminals 12a to 14a on the winding start side of the magnetic coils 12 to 14 are connected to the pulse generation terminal 11a of the pulse generation circuit. On the other hand, the winding end terminals 12b to 14b of the magnetic coils 12 to 14 are connected to the pulse generation terminal l ib of the above-mentioned noise generation circuit. Thus, the magnetic coils 12-14 are connected in parallel.

Note that the magnetic coils 12 to 14 are preferably processed using an insulating material so that dielectric breakdown does not occur due to an applied voltage. For example, the magnetic coils 12 to 14 are configured by passing an electric wire through a tube formed using an insulating material such as Teflon (registered trademark).

FIG. 2 is a diagram illustrating an example of an external configuration of the magnetic stimulation apparatus 10.

In FIG. 2, the magnetic coils 12 to 14 are arranged inside the mat 15 made of Teflon (registered trademark). It is fixed in place. That is, the magnetic coils 12 to 14 are arranged in a line inside the mat 15. The material forming the mat 15 is not limited to Teflon (registered trademark). For example, a cloth mat 15 may be used.

Simple fasteners (so-called Velcro (registered trademark)) 15 a and 15 b are attached to the mat 15. In use, for example, as shown in FIG. 3 (a), the mat 15 is wound around the knee of the human foot 31 and both ends of the mat 15 are fastened with the simple fasteners 15a and 15b. At this time, the magnetic coil 12-14 force is crouched according to the shape of the human foot 31 near the knee. FIG. 3 (b) is a cross-sectional view also showing the AA ′ direction force in FIG. 3 (a). In addition, it is preferable that the magnetic coils 12 to 14 have a 30 degree force of about 45 degrees. However, if the magnetic coils 12 to 14 are given according to the affected part, the angle of the magnetic coils 12 to 14 is not limited to such a range. Yes.

[0017] (Test results)

The inventors of the present application conducted the following tests in order to evaluate the usefulness of the magnetic coils 12 to 14 of the present embodiment.

The subjects were five healthy adults who had no history of bone strength, joints, and nerves and who had not performed special strength training. The average age of subjects is 23.6 years. The subject's forearm was also measured.

[0018] There was no burden on the arm in the supine position! / The subject gripped the grip strength meter with the posture, and the exercise task was performed using this grip strength meter. The exercise task was an isometric grasping exercise. The exercise load was 50% of the maximum voluntary contraction (MVC). By maintaining such an exercise load for 30 seconds, after applying local muscle fatigue to the forearm, they were allowed to rest for 180 seconds. The test was performed with such exercise load and rest as one set.

[0019] In such a test, after having the exercise load maintained for 30 seconds, a pulse magnetic field (magnetic stimulation) is applied to the forearm of the subject using the magnetic stimulation device 10 of the present embodiment. How does the muscular strength and the integrated electromyogram (the value obtained by integrating the electromyogram's potential over time) differ between when resting and when resting without magnetic stimulation? I asked about it. FIG. 4 is a diagram showing the relationship between the number of tests (number of sets) consisting of the exercise load and rest and the muscular strength of the subject. In Fig. 4, 0 [T] indicates a case where the patient was rested without applying a pulse magnetic field. On the other hand, 0.1 [Τ], 0.5 [Τ], and 1.0 [Τ] are 0.1 [T], 0 on the subject's forearm using the magnetic stimulation device 10 of the present embodiment, respectively. . 5 [T], 1.0 indicates that a pulse magnetic field of 0 [Τ] was applied. In FIG. 4, the average value of the muscular strength exerted by the subject when the exercise load is applied to the subject in each set, and the average of the muscular strength exerted by the subject when the exercise load is applied to the subject before fatigue are shown. The value normalized by the value is shown. In other words, Fig. 4 shows the average muscle strength in each set divided by the average muscle strength in the first set.

[0021] As shown in FIG. 4, when the pulse magnetic field is not applied to the test subject, it is found that the exercise load cannot be maintained and the muscular strength is reduced as the number of sets increases. . On the other hand, it can be seen that when the subject is given a pulse magnetic field of 1.0 [Τ], 0.5 [Τ], and 0.1 [Τ], the decrease in muscular strength can be suppressed. Thus, it can be seen that even when a pulse magnetic field of 1.0 [Τ] or less is applied, a decrease in the muscular strength can be suppressed.

FIG. 5 is a graph showing the relationship between the number of tests (number of sets) consisting of the exercise load and rest and the integrated electromyogram. In FIG. 5, “no magnetic stimulation” indicates a case where the patient is rested without applying a pulse magnetic field. On the other hand, “with magnetic stimulation” indicates that a pulse magnetic field of 0.1 [Τ] was applied to the subject's forearm using the magnetic stimulation apparatus 10 of the present embodiment. In FIG. 5 as well, as in FIG. 4, the average value of the integrated electromyogram when the exercise load is applied to the subject in each set, and the integrated electromyogram when the exercise load is applied to the subject before fatigue. A value obtained by standardizing the average value in the figure is shown. In other words, Fig. 5 shows the value obtained by dividing the average value of the integrated electromyogram in each set by the average value of the integrated electromyogram in the first set.

[0023] As shown in FIG. 5, when the pulse magnetic field is not given to the subject, the integral electromyogram increases rapidly as the number of sets increases. In contrast, when the subject is given a pulse magnetic field of 0.1 [Τ], the increase in the integrated electromyogram can be suppressed.

From Fig. 4 and Fig. 5, the pulse current passed through the magnetic coil to the extent that no muscle spasm is observed. It was proved that recovery of muscle fatigue can be promoted even if the size of the muscle is reduced. The recovery of muscle fatigue is thus promoted because ions generated in the body act on the muscle.

[0024] As described above, in the present embodiment, a pulse magnetic field of 0.1 [T] or more and 1.0 [Τ] or less is generated using the magnetic coils 12 to 14, thereby reducing muscle fatigue of the body. Therefore, the magnetic coils 12 to 14 can be formed using a thinner wire than the conventional one. Thereby, the magnetic coils 12 to 14 (mat 15) can be deformed relatively freely, and the magnetic coils 12 to 14 can be bent in accordance with the shape of the body during use. Therefore, the magnetic coils 12 to 14 can be fitted as much as possible to a curved portion such as a shoulder or knee of the body. Therefore, it is possible to promote the recovery of the function of the body with the magnetic coils 12 to 14 having the simplest possible structure.

[0025] In the present embodiment, the magnetic coils 12-14 are rubbed together in the mat 15 so that the magnetic coils 12-14 are arranged in a row, and the magnetic coils 12-14 are seated. As a result, the magnetic coils 12 to 14 can be easily attached to the body. As a result, the range of use of the magnetic stimulation apparatus 10 can be expanded as compared with the conventional case.

[0026] Furthermore, in this embodiment, a pulse current of 100 [Α] is caused to flow through the magnetic coils 12-14, and the current passed through the magnetic coils 12-14 is significantly lower than in the prior art. It is possible to reduce the restrictions on the place of use and handling method than before. The value of the pulse current flowing through the magnetic coils 12 to 14 can be 50 [50] or more and 300 [Α] or less, preferably 100 [Α] or more and 150 [Α] or less. Further, this pulse current is given to the magnetic coils 12 to 14 for a short time (for example, 100 [s]), and the magnetic coils 12 to 14 do not cause dielectric breakdown due to heat generated from the magnetic coils 12 to 14. As given at intervals.

In the present embodiment, the number of force magnetic coils using three magnetic coils 12 to 14 may be any number as long as it is one or more.

Moreover, in this embodiment, the magnitude | size of the force magnetic coils 12-14 which made the magnitude | size of the magnetic coils 12-14 about 10 [cm] can be match | combined with the location to be used. For example, the size of the magnetic coils 12 to 14 can be about 20 [cm]. This embodiment The size of the magnetic coils 12 to 14 can be appropriately determined in the range of 5 [cm] to 15 [cm], preferably 6 [cm] to 12 [cm].

[0028] In this embodiment, a pulse magnetic field of 0.1 [T] or more and 1.0 [T] or less is generated. However, the pulse magnetic field generated from the magnetic coils 12 to 14 is made smaller. May be. For example, even if a pulse magnetic field of 0.05 [T] or more and 0.1 [Τ] or less is applied, a decrease in muscular strength can be suppressed. That is, the pulse magnetic field generated by the magnetic stimulation apparatus 10 of the present embodiment is 0.05 [Τ] or more and 1.0 [Τ] or less, preferably 0.05 [Τ] or more and 0.2 [Τ]. It becomes as follows. In this way, the current flowing through the magnetic coils 12 to 14 can be further reduced. Thereby, the electric wire used for magnetic coils 12-14 can be made still thinner, and magnetic coils 12-14 can be bent more freely. Therefore, the magnetic coils 12 to 14 can be further fitted to the curved portion such as the shoulder or knee of the body.

The diameter of the wire used for the magnetic coils 12 to 14 is 0.05 [mm] or more and l [mm] or less, preferably 0.1 [mm] or more and 0.5 [mm] or less. be able to.

[0029] In the present embodiment, the magnetic coils 12 to 14 are formed using electric wires having a circular cross section. However, the magnetic coils need not necessarily be formed using electric wires having a circular cross section. Absent. For example, the magnetic coil may be formed using a thin plate-shaped electric wire (copper wire).

[0030] For example, as shown in FIG. 6, a thin plate-like electric wire (for example, copper wire) 61a to 61n having a width of 20 [mm] and a thickness of 0.1 [mm] is rounded, A plurality of electric wires (for example, copper wires) 6 la to 61n processed into a circular shape are electrically connected so that the directions in the order (directions of arrows in the figure) are the same direction to form a magnetic coil. That's fine. In this case, it is preferable to prevent a dielectric breakdown from occurring in the formed magnetic coil by wrapping a cloth-like tape formed of an insulating material around the electric wire 6 la to 6 In.

This makes it possible to increase the current flowing through the magnetic coil as much as possible while reducing the thickness of the mat 15 as much as possible in view of the effects described above. Thereby, the range of the pulse magnetic field that also generates the magnetic coil force can be made wider, and the dynamic range of the magnetic stimulation apparatus 10 can be further expanded. In addition, the width and thickness of the thin plate-like electric wires 61a to 61n are not limited to those described above. For example, the width can be 7.5 [mm] or more and 25 [mm] or less, preferably 10 [mm] or more and 20 [mm] or less. Further, the thickness can be 0.02 [mm] or more and 0.5 [mm] or less, preferably 0.05 [mm] or more and 0.2 [mm] or less.

In this embodiment, both ends of the mat 15 are fastened with the simple fasteners 15a and 15b. However, in addition to the simple fasteners 15a and 15b, a band is placed around the mat 15 attached to the affected part. In addition, the mat 15 may be further prevented from being displaced.

Explanation of symbols

[0033] 10 Magnetic stimulator

11 Pulse generator

12-14 magnetic coil

15 Pine

31 Affected part (human foot)

Claims

The scope of the claims

[1] A magnetic coil used in a magnetic therapy device that applies a magnetic field to the body,

A magnetic coil that fits into the body when attached to the body.

[2] The magnetic coil according to [1], which is formed using a conductor having a cross-sectional diameter of 0.05 [mm] or more and 1 [mm] or less.

[3] The cross-sectional width is 7.5 [mm] or more and 25 [mm] or less, and the thickness is 0.02 [mm] or more, 0.5

2. The magnetic coil according to claim 1, wherein the magnetic coil is formed using a conductor having a length of [mm] or less.

[4] The method according to any one of claims 1 to 3, further comprising first and second terminals connected to a circuit for passing a current having a peak value of 50 [A] or more and 300 [A] or less. The magnetic coil according to 1.