Magnetic stimulation device

Abstract

To provide a magnetic stimulation device capable of bringing an excitation coil into close contact with a body surface without gaps, regardless of body shape.SOLUTION: A magnetic stimulation device A1 includes a pair of casings 1a, 1b having treatment-side bottom surfaces 3a, 3b facing an affected area, and a pair of excitation coils 10a, 10b which is provided in the casings 1a, 1b, respectively and major portions of which are wound in the same direction along the treatment-side bottom surfaces 3a, 3b. The pair of excitation coils 10a, 10b includes body portions 10h, 10i being main portions arranged along the treatment-side bottom surfaces 3a, 3b, and separation portions 11a, 11b formed by bending opposite edges of the body portions 10h, 10i in a direction away from the treatment-side bottom surfaces 3a, 3b. Portions of the treatment-side bottom surfaces 3a, 3b corresponding to the separation portions 11a, 11b are cut out, and space portions 9a, 9b are formed in the cut-out portions.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an improvement in a magnetic stimulation device, and in particular to a magnetic stimulation device for the spine and sacrum that can repeatedly magnetically stimulate the multifidus muscles on both sides of the spine and the sacral nerves emerging from the sacrum. [Background technology]

[0002] There are various causes of lower back pain. One of them is said to be muscle contraction or imbalance between the left and right sides of the multifidus muscles, which are small muscles that attach across the vertebrae from the neck to the lower back. When the multifidus muscles on both sides of the spine work, the spine extends, and when only one side works, the spine rotates or bends laterally. In the medical field, various symptomatic treatments have been proposed, such as stretching exercises to strengthen the multifidus muscle, but at present it is difficult to train it effectively.

[0003] Additionally, problems related to the sacral nerve include urinary incontinence. Urinary incontinence, the involuntary leakage of urine, has been overlooked because it rarely directly affects life, but it often interferes with daily life, and there is a demand for measures to address it. In particular, with the rapid aging of the population in recent years, the number of urinary incontinence patients, both men and women, is increasing. There is a need for effective treatments to improve the lives of these patients.

[0004] One treatment for urinary incontinence is to electrically stimulate the sacral nerves that emerge from the sacrum. This therapy (sacral nerve stimulation) involves inserting thin electrodes into the sacrum to stimulate the sacral nerves and suppress overactive bladder. To provide continuous electrical stimulation, a device similar to a cardiac pacemaker must be implanted in the body. This therapy is an invasive procedure that requires the implantation of electrodes and devices, and places a significant burden on the patient.

[0005] Therefore, a magnetic stimulation device that applies magnetic stimulation to nerves around the spine and sacrum has been proposed (Patent Document 1). The device described in Patent Document 1 is a magnetic stimulation device that generates a fluctuating magnetic field inside a patient's body to train the muscles and thereby treat the nervous system, magnetically stimulating the nerves or muscles in the affected area. This magnetic stimulation device has multiple one-turn magnetic stimulation coils made of hollow conductors arranged in a circular shape in the center of a container (casing). These magnetic stimulation coils are a group of molded coils molded from synthetic resin and formed into a disk shape. Both ends of each magnetic stimulation coil are connected in turn by an insulating water supply pipe, through which a cooling fluid is flowed.

[0006] This magnetic stimulation device can be installed on the seat of a chair, on the supine side of a bed, or on the rotating arm of a stand, depending on the area of ​​the body that is affected. For the treatment of urinary incontinence, the device is placed under the buttocks to concentrate the magnetic flux and stimulate the pelvic floor muscles, sacral nerve, and pudendal nerve. For the treatment of lower back pain, the magnetic stimulation device is placed close to the lower back and applies continuous or burst magnetic stimulation to relieve or reduce pain. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 9-276418 Summary of the Invention

[0008] However, the coil of the magnetic stimulation device in Patent Document 1 is disk-shaped, and the treatment surface of the device that generates the magnetic flux is flat. Similarly, the treatment surfaces of coils in magnetic stimulation devices currently in general use are often flat. On the other hand, the stimulation areas in the lumbar region on both sides of the spine where the multifidus muscles are located and the buttocks where the sacrum are located are large and have curved surfaces with large irregularities. For effective stimulation, a magnetic stimulation device with a treatment surface roughly the same size as the stimulation site is desirable. However, when a large, disc-shaped magnetic stimulation device is applied to the curved lower back or buttocks, a gap forms between the device's treatment surface and the body surface of the lower back or buttocks, making it difficult to fit the coil inside the device to the body surface. Because the magnetic field generated by the coil of a magnetic stimulation device is roughly inversely proportional to the square of the distance from the coil, this gap significantly attenuates the magnetic field that reaches the stimulation site's body surface. In addition, the shape of the body surface of the lower back or buttocks varies widely, making it impossible to design a magnetic stimulation coil that is suitable for everyone.

[0009] The object of the present invention is to solve the problems of the conventional example and to provide a magnetic stimulation device that can fit the excitation coil without gaps to any body shape. [Means for solving the problem]

[0010] The invention described in claim 1 (magnetic stimulation device A1: Figs. 1 to 8, Fig. 15: without core) is as follows: A magnetic stimulation device (A1) is comprised of a pair of casings (1a, 1b) each having a treatment-side bottom surface (3a, 3b) facing the affected area, and a pair of excitation coils (10a, 10b) provided in the casings (1a, 1b) and having main portions wound in the same direction along the treatment-side bottom surfaces (3a, 3b), The pair of excitation coils 10a and 10b includes main body portions 10h and 10i, which are main parts arranged along the treatment-side bottom surfaces 3a and 3b, and spaced portions 11a and 11b, which are formed by bending opposing sides of the main body portions 10h and 10i in a direction away from the treatment-side bottom surfaces 3a and 3b, The treatment-side bottom surfaces 3a and 3b are cut out at portions that correspond to the separated portions 11a and 11b, and spaces 9a and 9b are formed in the cut-out portions.

[0011] The invention of claim 2 is a magnetic stimulation device A2 (FIGS. 11 to 14, FIG. 16: with core) according to claim 1, The device is characterized by further comprising U-shaped magnetic cores 20a and 20b respectively provided across the main body portions 10h and 10i of the excitation coils 10a and 10b, with magnetic pole generating surfaces 22a and 22b facing the treatment-side bottom surfaces 3a and 3b.

[0012] The invention of claim 3 is the magnetic stimulation device A2 according to claim 2, The magnetic cores 20a and 20b are characterized in that they are arranged along the spaced apart portions 11a and 11b of the exciting coils 10a and 10b.

[0013] The invention of claim 4 is an example in which the power supply portions 18 and 19 of the excitation coils 10a and 10b are pulled out together from one casing 1a (magnetic stimulation device A1: FIG. 8 / magnetic stimulation device A2: FIG. 14), The magnetic stimulation device A1 or A2 according to claim 1 or 2, a pair of power supply portions 18 and 19 provided in one casing 1a and connected to a power source; a first connection portion 16 that connects the winding end 15a of one excitation coil 10a and the winding start end 13b of the other excitation coil 10b; The coil is characterized in that it is further configured to include a second connection portion 17 that connects the lead-out end 19a of the other power supply portion 19 and the winding end 15b of the other exciting coil 10b.

[0014] The invention of claim 5 is an example in which the power supply portions 18 and 19 of the excitation coils 10a and 10b are drawn out from the casings 1a and 1b, respectively (magnetic stimulation device A1: FIG. 15 / magnetic stimulation device A2: FIG. 16 ), The magnetic stimulation device A1 or A2 according to claim 1 or 2, a pair of power supply portions 18 and 19 provided in the casings 1a and 1b, respectively, and connected to a power source; The power supply portions 18 and 19 are characterized in that they are connected to the winding start ends 13a and 13b and winding end ends 15a and 15b of the excitation coils 10a and 10b, respectively. [Effects of the Invention]

[0015] In the magnetic stimulation device A1 (first embodiment) of claim 1, the excitation coils 10a and 10b are divided into left and right halves, and each is housed in a pair of left and right casings 1a and 1b, making it easy to fit the casings 1a and 1b around the back, waist, or buttocks of patients of any body type. In addition, the opposing sides of the pair of excitation coils 10a and 10b are bent in a direction away from the treatment-side bottom surfaces 3a and 3b, and the portions of both casings 1a and 1b that correspond to the separated portions 11a and 11b are cut out, forming spaces 9a and 9b in these areas.When set in place, the rounded bulges of the back, waist, or buttocks fit into the spaces 9a and 9b, making it easy to bring the portions of excitation coils 10a and 10b located on the treatment-side bottom surfaces 3a and 3b (main body portions 10h and 10i) into close contact with the affected area without any gaps.In addition, because the opposing sides of the pair of excitation coils 10a and 10b are bent in a direction away from the treatment-side bottom surfaces 3a and 3b, the magnetic flux in the opposite directions generated between these separated portions 11a and 11b is less likely to reach the affected area, and does not adversely affect the eddy current U flowing in the affected area.

[0016] A magnetic stimulation device A2 (second embodiment) according to claim 2 is a case in which magnetic cores 20a and 20b are provided, whereas magnetic cores 20a and 20b are not provided in the (first embodiment). When magnetic cores 20a and 20b are installed, the magnetic flux changes sharply at "treatment point P" between legs 24 and 26, causing eddy currents U generated inside the body to flow in a concentrated manner. This "treatment point P" is installed at a location that corresponds to the affected multifidus muscle or sacral nerve, so magnetic stimulation is applied to these areas efficiently.

[0017] In the magnetic stimulation device A2 (second embodiment) of claim 3, magnetic cores 20a and 20b are arranged along the spaced apart portions 11a and 11b of excitation coils 10a and 10b. Providing magnetic cores 20a and 20b in these positions makes it easier for the practitioner to recognize the positions of magnetic cores 20a and 20b and to arrange magnetic cores 20a and 20b closely together during treatment. As a result, eddy currents U flow intensively between legs 24 and 26 of two closely arranged magnetic cores 20a and 20b, thereby achieving a high therapeutic effect.

[0018] By providing the excitation coils 10a and 10b as in the invention of claim 4, the power supply portions 18 and 19 of the excitation coils 10a and 10b are combined into one, making it easier to handle the two separate casings 1a and 1b. In contrast to this, if the excitation coils 10a and 10b are provided as in the invention of claim 5, the left and right excitation coils 10a and 10b are separated, and the wiring becomes simpler. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a plan view of a magnetic stimulation device (first embodiment) of the present invention. [Figure 2] FIG. 2 is a bottom view of FIG. 1. [Figure 3] FIG. 2 is a view taken along the arrow AA in FIG. [Figure 4] 2 is a view of the cross section of FIG. 1 taken along the arrow BB. [Figure 5] FIG. 2 is a perspective view of one of the casings in FIG. 1. [Figure 6] FIG. 6 is a half cross-sectional view of FIG. 5. [Figure 7] FIG. 7 is a partially exploded view of FIG. [Figure 8] FIG. 2 is a first wiring diagram of the first embodiment. [Figure 9] FIG. [Figure 10] FIG. 10 is a plan view of FIG. 9. [Figure 11] FIG. 2 is a plan view of a magnetic stimulation device (second embodiment) of the present invention. [Figure 12]FIG. 12 is a bottom view of FIG. [Figure 13] 12 is a view of the cross section of FIG. 11 taken along the arrow CC. [Figure 14] FIG. 10 is a first wiring diagram of the second embodiment. [Figure 15] FIG. 2 is a second wiring diagram of the first embodiment. [Figure 16] FIG. 10 is a second wiring diagram of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] Next, the present invention will be described in detail based on examples. Note that these examples are provided to facilitate understanding by those skilled in the art. In other words, it should be understood that the present invention is limited only by the technical ideas described throughout the specification, and is not limited to these examples.

[0021] The magnetic stimulation device of the present invention is divided into embodiments depending on whether or not magnetic cores 20a and 20b are present, and in each embodiment, there are two winding methods for excitation coils 10a and 10b. A magnetic stimulation device A1 without magnetic cores 20a and 20b is referred to as the first embodiment, and a magnetic stimulation device A2 with magnetic cores 20a and 20b is referred to as the second embodiment. As described above, there are two winding methods for excitation coils 10a and 10b, which are referred to as the first and second wiring methods, respectively. First, the first wiring method of the first embodiment will be described, then the second wiring method of the first embodiment will be described, and then the second embodiment (first and second wiring methods) will be described. The difference between the first and second embodiments is the presence or absence of magnetic cores 20a and 20b as described above, so in the second embodiment, the magnetic cores 20a and 20b will be described, and the description of the first embodiment will be used for the other parts.

[0022] (First embodiment, first wiring method) The main components of the magnetic stimulation device A1 of the first embodiment are a pair of left and right casings 1a and 1b and a pair of left and right excitation coils 10a and 10b. A fan (not shown) may be provided to cool the coils as needed. As shown in Figure 1, casings 1a and 1b are divided and formed symmetrically. The undersides of casings 1a and 1b are treatment-side bottom surfaces 3a and 3b that face the patient. As can be seen in Figure 2, treatment-side bottom surfaces 3a and 3b of both casings 1a and 1b are C-shaped and inverted C-shaped when viewed from the bottom. The open portions of the C and inverted C shapes of casings 1a and 1b are called opposing surfaces 2a and 2b. Concave surfaces 4a and 4b are formed on opposing surfaces 2a and 2b of casings 1a and 1b to accommodate the separated portions 11a and 11b of excitation coils 10a and 10b.

[0023] The treatment-side bottom surfaces 3a and 3b are formed into a C-shape and an inverted C-shape as described above by removing the portions of their opposing surfaces 2a and 2b (the portions inside the main bodies 10h and 10i of the excitation coils 10a and 10b). These removed portions are the spaces 9a and 9b. Specifically, the treatment-side bottom surfaces 3a and 3b of the casings 1a and 1b are removed in the portions that correspond to the separated portions 11a and 11b of the excitation coils 10a and 10b, forming the spaces 9a and 9b. The C-shaped and inverted C-shaped portions serve as the coil holders 5a and 5b. The bottom surfaces of the coil holders 5a and 5b are formed with storage grooves 6a and 6b that open to the treatment-side bottom surfaces 3a and 3b, and their ends on the opposing surfaces 2a and 2b side open to the concave surfaces 4a and 4b. In the embodiment of FIG. 2, the arc portions on the outer periphery of the receiving grooves 6a and 6b are cut away so that the arc portions of the exciting coils 10a and 10b do not interfere with the outer periphery walls of the receiving grooves 6a and 6b. The casings 1a and 1b are provided on their upper surfaces with inverted U-shaped handles 8a and 8b.

[0024] The excitation coils 10a and 10b are made of insulated conductor wires, such as Litz wires, rectangular copper strips, or rectangular aluminum strips.

[0025] Litz wire is a wire material for high-frequency coils, made by twisting together a bundle of enameled wires, for example, copper wire with a circular cross section coated with insulating paint. Litz wire increases the conductor surface area by dividing the conductor into smaller pieces, suppressing increases in AC resistance due to the skin effect and proximity effect at high frequencies. This reduces the temperature rise of the excitation coils 10a and 10b. Flat wire is a long piece of wire with a circular or quadrangular (square or rectangular) cross section, with an insulating coating formed on its surface. It is wound in multiple layers in the radial direction and in multiple layers in the vertical direction, with each turn offset by one in the vertical and radial directions. In this case, too, like Litz wire, the wire is wired in such a way that each turn is offset by one, which, like Litz wire, reduces the skin effect and allows fluctuating current to flow more or less evenly, suppressing temperature rise.

[0026] As an example of the material, for Litz wire, a wire made by twisting together 160 wires with a diameter of 0.2 mm is used, and for insulated conductor wire with a square cross section, a wire made by bundling together 12 wires with a thickness of 0.9 mm and a height of 1.6 mm is used.

[0027] The insulating coating of the insulated copper wire is made of enamel (a polymer compound dissolved in varnish), urethane resin, or polyamideimide. In this example, the thickness of the insulating coating is 20 μm. In addition, in this example, the entire surface of the coil after winding is covered with glass cloth tape to further improve insulation.

[0028] As mentioned above, there are two ways to wind the excitation coils 10a and 10b: the first connection method (Fig. 8) and the second connection method (Fig. 15). In the first connection method, the power supply parts 18 and 19 of the excitation coils 10a and 10b are gathered together in one casing 1a (or casing 1b), while in the second connection method, the left and right excitation coils 10a and 10b are independent, and the power supply parts 18 and 19 are provided in the respective casings 1a and 1b.

[0029] (First wiring method) The first wiring method will be described. The exciting coils 10a and 10b are wound in multiple layers or in multiple stages in the same direction along the treatment-side bottom surfaces 3a and 3b. The excitation coils 10a and 10b include main body portions 10h and 10i arranged along the treatment-side bottom surfaces 3a and 3b, spaced-apart portions 11a and 11b formed by bending the opposing sides of the main body portions 10h and 10i in a direction away from the treatment-side bottom surfaces 3a and 3b, a pair of power supply portions 18 and 19 provided in one casing 1a and connected to a power source, a first connection portion 16 connecting the winding-end end 15a of one excitation coil 10a to the winding-start end 13b of the other excitation coil 10b, and a second connection portion 17 connecting the lead-out end 19a of the other power supply portion 19 to the winding-end end 15b of the other excitation coil 10b. The spaced-apart portions 11a and 11b in the figure are bent vertically. A conductor 19b extending from the lead-out end 19a is wound along or together with one of the separated portions 11a and is led out of one of the casings 1a as a power supply portion 19. The winding start end 13a of one of the main body portions 10h is connected to the power supply portion 18.

[0030] The main body parts 10h and 10i arranged along the treatment side bottom surfaces 3a and 3b are fitted into the storage grooves 6a and 6b of the casings 1a and 1b, respectively, and their spaced apart parts 11a and 11b extend vertically upward from the openings of the storage grooves 6a and 6b and are fitted into the concave surfaces 4a and 4b of the opposing surfaces 2a and 2b.

[0031] The exciting coils 10a and 10b are fixed to the opposing surfaces 2a and 2b of the casings 1a and 1b by fixing members 40. 5 and 6, the fixing member 40 is a plate-shaped member and is provided with mounting grooves 41 in accordance with the exciting coils 10a and 10b. The fixing member 40 is attached to the opposing surfaces 2a and 2b of the casings 1a and 1b so as to straddle the spaced apart portions 11a and 11b of the exciting coils 10a and 10b, and is fixed with screws (not shown). In the illustrated embodiment, auxiliary blocks 7a and 7b, which form part of the casings 1a and 1b, are attached to the inner periphery of the openings of the accommodating grooves 6a and 6b, and the inner part of the fixing member 40 is screwed to these parts.

[0032] (How to use the first embodiment) The magnetic stimulation device A1 configured as described above is used as follows. In this case, it is intended to magnetically stimulate the multifidus muscle in the lumbar region, as shown in Figures 9 and 10. Of course, it can also be applied to the buttocks and used to stimulate the sacral nerve. The handles 8a and 8b of the casings 1a and 1b are grasped with the left and right hands and the casings are placed on the lower back of a patient lying face down. The surface of the waist is made up of a gently undulating curve, and the two halves, casings 1a and 1b, are set around the spine to fit the body surface. Because casings 1a and 1b are separated, they can be positioned to sandwich the device while avoiding the protrusion of the spine, and each casing can be fitted to the body surface, making it easy to fit them closely to the body surface.

[0033] The treatment-side bottom surfaces 3a and 3b of the left and right casings 1a and 1b have spaces 9a and 9b into which the bulging portions of the body surface fit, allowing the main bodies 10h and 10i of the excitation coils 10a and 10b, which are provided along the treatment-side bottom surfaces 3a and 3b, to come into contact with the body surface without any gaps. In this way, the main bodies 10h and 10i of the excitation coils 10a and 10b are set symmetrically on the multifidus muscle. When the magnetic stimulation device A1 is turned on and a fluctuating current is supplied to the excitation coils 10a and 10b, an eddy current U is generated in the affected lumbar region below the excitation coils 10a and 10b against the fluctuating current, thereby providing magnetic stimulation to the nerves of the multifidus muscle.

[0034] At this time, because the excitation coils 10a and 10b are divided into two, magnetic flux in the opposite direction is generated from the gap between the separated portions 11a and 11b of the excitation coils 10a and 10b, but because the separated portions 11a and 11b are far from the affected area and are oriented horizontally, very little of the flux reaches the affected area. Therefore, even though the excitation coils 10a and 10b are divided into left and right halves, the excitation coils 10a and 10b act as if they were a single coil and have almost no effect on the eddy current U generated in the affected area.

[0035] Generally, when a fluctuating current continues to flow through the excitation coils 10a and 10b, the conductor gradually heats up due to the skin effect (a phenomenon in which, when a fluctuating current flows through a conductor, electromagnetic induction makes it difficult for the fluctuating current to flow through the center of the conductor, causing the fluctuating current to flow on the surface of the conductor). However, in the first embodiment, the insulated conductor wire of the excitation coils 10a and 10b is wound in a coil shape with several turns, alternating between the radial and vertical directions, thereby canceling the skin effect and suppressing the temperature rise of the excitation coils 10a and 10b, thereby preventing burns to the affected area.

[0036] (Second wiring method) The second wiring method will now be described. In this wiring method, the left and right excitation coils 10a and 10b are independent, and a pair of power supply parts 18 and 19 connected to a power source are provided on each of the casings 1a and 1b. These power supply parts 18 and 19 are connected to the winding start ends 13a and 13b and the winding end ends 15a and 15b of the excitation coils 10a and 10b, respectively. If a fluctuating current is supplied, an eddy current U will flow in the affected area, as described above.

[0037] (Second embodiment) The magnetic stimulation device A2 of the second embodiment is a device in which magnetic cores 20a and 20b are added to the magnetic stimulation device A1 of the first embodiment (first or second wiring method). The magnetic cores 20a and 20b are U-shaped components with legs 24 and 26 projecting in the same direction from both ends of the magnetic core body, and are made by laminating multiple rolled silicon steel sheets with thin insulating coatings. The magnetic cores 20a and 20b in this embodiment are made by laminating U-shaped punched components as described above, or by multi-wound rolled silicon steel strips that are then divided into two. The rolled silicon steel sheets used in this embodiment are 0.35 mm thick. In this embodiment, the cross section of the legs 24 and 26 taken at a right angle to the longitudinal direction is quadrangular (square or rectangular) or circular (not shown). These surfaces are called magnetic pole generating surfaces 22a and 22b.

[0038] In this case, when electricity is applied, the eddy current U generated inside the body is concentrated between the legs 24 and 26, compared to the first embodiment. As a result, a higher therapeutic effect can be achieved compared to the first embodiment. [Explanation of symbols]

[0039] A1: Magnetic stimulator (without core), A2: Magnetic stimulator (with core), P: Treatment point, U: Eddy current 1a and 1b: casing, 2a and 2b: opposing surfaces, 3a and 3b: treatment side bottom surface, 4a and 4b: concave surface, 5a and 5b: coil holding portion, 6a and 6b: accommodation groove, 7a and 7b: auxiliary block, 8a and 8b: handle, 9a and 9b: space portion, 10a and 10b: excitation coil, 10h and 10i: main body portion, 11a and 11b: separation portion, 13a: winding start end, 13b: winding start end, 15a and 15b: winding end, 16: first connection portion, 17: second connection portion, 18 and 19: power supply portion, 19a: pull-out end, 19b: conducting wire extending from the pull-out end, 20a and 20b: magnetic core, 22a and 22b: magnetic pole generating surface, 24 and 26: legs, 40: fixing member, 41: mounting groove

Claims

1. A magnetic stimulation device A1 is configured with a pair of casings 1a and 1b having treatment-side bottom surfaces 3a and 3b facing the affected area, and a pair of excitation coils 10a and 10b provided in the casings 1a and 1b, the main portions of which are wound in the same direction along the treatment-side bottom surfaces 3a and 3b. The pair of excitation coils 10a and 10b include main body portions 10h and 10i, which are main parts arranged along the treatment-side bottom surfaces 3a and 3b, and spaced portions 11a and 11b, which are formed by bending opposing sides of the main body portions 10h and 10i in a direction away from the treatment-side bottom surfaces 3a and 3b, The magnetic stimulation device is characterized in that the portions of the treatment-side bottom surfaces (3a, 3b) that correspond to the separated portions (11a, 11b) are cut out, and spaces (9a, 9b) are formed in the cut-out portions.

2. The magnetic stimulation device of claim 1, further comprising U-shaped magnetic cores 20a and 20b respectively provided across the main body portions 10h and 10i of the excitation coils 10a and 10b, with magnetic pole generating surfaces 22a and 22b facing the treatment-side bottom surfaces 3a and 3b.

3. 3. The magnetic stimulation device according to claim 2, wherein the magnetic cores (20a, 20b) are arranged along the spaced apart portions (11a, 11b) of the excitation coils (10a, 10b).

4. The pair of power supply portions 18 and 19 are provided in one of the casings 1a and connected to a power source; a first connection portion 16 that connects a winding end 15a of one of the excitation coils 10a and a winding start end 13b of the other excitation coil 10b; 3. The magnetic stimulation device according to claim 1, further comprising a second connection portion 17 that connects the lead-out end 19a of the other power supply portion 19 and the winding end 15b of the other excitation coil 10b.

5. The device further includes a pair of power supply portions 18 and 19 provided in the casings 1a and 1b, respectively, and connected to a power source; 3. The magnetic stimulation device according to claim 1, wherein the power supply portions (18, 19) are connected to the winding start ends (13a, 13b) and winding end ends (15a, 15b) of the excitation coils (10a, 10b), respectively.

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