WO2016171131A1

WO2016171131A1 - Coil device and magnetic stimulation treatment system

Info

Publication number: WO2016171131A1
Application number: PCT/JP2016/062381
Authority: WO
Inventors: 勝志藤本; 貴光岡山; 匡道翠川; 大西　寿章
Original assignee: 帝人ファーマ株式会社; タツタ電線株式会社
Priority date: 2015-04-22
Filing date: 2016-04-19
Publication date: 2016-10-27
Also published as: JPWO2016171131A1

Abstract

Provided is a coil device for use in a magnetic stimulation treatment device, the coil device comprising the following: a coil housing; a cable housing; a communication path that communicates between an internal space of the coil housing and an internal space of the cable housing; a coil comprising a coil conductor housed in the coil housing; and a pair of conductive wires that pass through the cable housing and are lead into the cable housing from outside, the pair of conductive wires being electrically connected to both ends of the coil conductor. The cable housing has a fixed housing portion that is integrally linked to the coil housing, and a rotating housing portion that is linked to the fixed housing portion so as to be rotatable about a prescribed axis. The pair of conductive wires pass through the rotating housing portion.

Description

Coil device and magnetic stimulation treatment system

The present invention relates to a coil device used in a repetitive transcranial magnetic stimulation treatment system. The present invention also relates to a magnetic stimulation treatment system provided with the coil device.

Repetitive transcranial magnetic stimulation is a non-invasive method of applying magnetic stimulation to specific parts of the brain, such as nerves, to treat neurological diseases such as stroke pain, depression, Alzheimer's disease, etc. It is a treatment that can be planned. In this repetitive transcranial magnetic stimulation method, magnetism generating means such as an excitation coil is arranged at a specific position on the patient's scalp surface, and magnetic stimulation is performed from the magnetism generating means to a specific part of the patient's brain. As a specific method, Patent Documents 1 and 2 describe that a current is passed through a coil unit installed on the surface of a patient's scalp to locally generate a small pulsed magnetic field, and the principle of electromagnetic induction is used in the skull. It has been disclosed that stimulation is given to the nerves in the brain directly under the coil unit by causing eddy currents.

¡In order to perform effective magnetic stimulation treatment, it is necessary to arrange magnetic stimulation coils at appropriate locations according to the treatment content. Therefore, prior to actual treatment, it is necessary to move the magnetic stimulation coil along the patient's head surface to determine the optimal coil position. In actual treatment, it is necessary to install a coil at a predetermined optimal coil position. However, a cable for applying a high-frequency current is connected to the magnetic stimulation coil. If you attempt to change the position or angle of the coil, the movement is limited by the cable, and the stimulation coil is placed at the desired position or angle. There is a problem that it is difficult to set. In addition, there is a problem that an attempt to secure a space where the cable can move freely leads to an increase in the size of the system.

JP 2012-125546 A WO2010 / 147064 specification

Therefore, an object of the present invention is to provide a coil device in which position adjustment and angle adjustment of a magnetic stimulation coil are not restricted by a cable, and a magnetic stimulation system including the coil device.

To achieve this object, one aspect of the present invention is:
A coil device for use with a magnetic stimulation therapy system,
A coil housing;
A cable housing;
A communication path communicating the internal space of the coil housing and the internal space of the cable housing;
A coil comprising a coil conductor housed in the coil housing;
Comprising a pair of conductors that penetrate the cable housing and are drawn from the outside to the inside of the cable housing and electrically connected to both ends of the coil;
The cable housing has a fixed housing part integrally connected to the coil housing, and a rotating housing part rotatably connected to the fixed housing part about a predetermined axis,
The pair of conductive wires penetrates the rotating housing portion.

According to this embodiment, since the rotating housing part to which the pair of conductors are connected can rotate around the axis with respect to the fixed housing part, the change is absorbed by the rotation of the rotating housing part even if the direction of the coil device is changed. it can. Therefore, since the movement of the coil device is not restricted by the conducting wire, the coil device can be freely rotated according to the treatment site.

1 is a perspective view showing the overall configuration of a transcranial magnetic stimulation system according to the present invention. The perspective view of the coil unit used for the system of FIG. The perspective view of a coil. Sectional drawing of a cable housing. The top view of the coil housing part which shows the connection state of a cable conducting wire and a coil conductor. The perspective view of the coil unit except an upper cable housing. The top view of the coil housing part which shows the state with which resin was filled inside the cable housing. Side view [FIG. 8A] and perspective view [FIG. 8B] of the cable conducting wire guide block. The partial expanded sectional view of the coil which consists of one conductor, and a coil unit. The partial expanded sectional view of the coil which consists of two conductors, and a coil unit.

Hereinafter, an embodiment of a coil device and a transcranial magnetic stimulation system according to the present invention will be described with reference to the accompanying drawings.

In the following description, terms indicating directions such as “up” and “down” are used to facilitate understanding of the invention with reference to the accompanying drawings. It does not indicate the actual usage of the cranial magnetic stimulation system. Therefore, the technical scope of the present invention should not be limitedly interpreted by these terms.

Referring to FIG. 1, a transcranial magnetic stimulation system (hereinafter simply referred to as “system”) 1 according to an embodiment includes a patient support mechanism (support unit) 3 that supports a patient 2. In the embodiment, the patient support mechanism 3 is a chair, but may be a bed instead. The system 1 also has a magnetic stimulator 4 that provides repetitive magnetic stimulation to the brain of the patient 2 supported by the patient support mechanism 3. The magnetic stimulation device 4 includes a coil unit (coil device) 5 including a coil 11 (detailed shape is shown in FIG. 3) for forming a dynamic magnetic field, and a control unit that controls a high-frequency current applied to the coil. 6. The coil unit 5 is supported by a support mechanism 8 including an appropriate positioning mechanism 7 so that it can freely move to an arbitrary position along the head surface of the patient 2 and can be positioned at an arbitrary position.

The coil unit 5 and the control unit 6 are connected by a flexible cable 10. The cable 10 includes, for example, a pair of conductive wires 12 (see FIG. 2) for supplying a high frequency current to the coil. The cable 10 also includes a shield 61 that surrounds the lead 12. Therefore, even if a high frequency current is applied to the conductive wire 12 in the cable, electrical noise is not emitted to the outside and the peripheral device is not damaged. The cable 10 may include a signal line of a device built in the coil unit 5. The device and the signal line include, for example, an electric wire that connects a temperature detector (not shown) built in the coil unit 5 and the control unit 6.

As shown in FIG. 2, in the embodiment, the coil unit 5 includes a coil housing 13 and a cable housing 14. The coil housing 13 accommodates the coil 11. As shown in FIG. 3, the coil 11 is an eccentric spiral 8-shaped coil (butterfly-shaped coil) in which conductors are arranged in two spirals, and a spiral portion 15 spirally wound is accommodated in the coil housing 13. . Returning to FIG. 2, the cable housing 14 includes a cable tip (

cable conductors

54 and 55 shown in FIG. 5) and a conductor end of the coil 11 electrically connected thereto (conductor end 16 a shown in FIG. 5, 16b).

The coil housing 13 is made of an electrically insulating material, and includes a lower coil housing portion 18 that covers the lower surface of the coil 11 and an upper coil housing portion 19 that covers the upper surface of the coil 11. Spiral shapes 21, 22 (see FIG. 9) corresponding to the outer shape of the coil are provided on the upper surface of the lower coil housing portion 18 and the lower surface of the upper coil housing portion 19, respectively. A spiral coil housing space 23 is formed. The lower surface of the lower coil housing portion 18 is formed by a cubic curved surface similar to the shape of the human head surface. The curved surface may be either a complete concave spherical surface whose distance from a certain point in space is constant or an incomplete concave curved surface whose distance is not constant like a human head surface. Correspondingly, the spiral portion 15 is formed along the curved surface of the lower coil housing portion 18. In addition, while forming the lower surface of the lower coil housing part 18 in a plane, the spiral part 15 may be formed along the plane of the lower coil housing part 18.

As shown in FIG. 2, the cable housing 14 has a substantially cylindrical shape having a vertical shaft 25, and is composed of a lower cable housing portion 26 and an upper cable housing portion 27 made of an electrically insulating material. In the embodiment, the lower cable housing portion 26 is formed integrally with the upper coil housing portion 19 of the coil housing 13. In the embodiment, the upper cable housing portion 27 is rotatably connected to the lower cable housing portion 26 around the shaft 25 as will be described later.

As shown in FIG. 9, the coil 11 is housed in a coil housing space 23 formed between the lower coil housing portion 18 and the upper coil housing portion 19. In the embodiment, the shape 22 formed on the upper surface of the lower coil housing portion 18 has a spiral groove 28 corresponding to the eccentric spiral 8-shaped coil 11 in which the coil 11 is accommodated.

A gap 29 (for example, a gap of about 0.1 to 1.0 mm) existing between the lower coil housing portion 18 and the upper coil housing portion 19 and the coil 11 is filled with a resin 30 of an insulating material. The Joule heat of the conducting wire is efficiently dissipated through the resin by the resin filled in the gap 29. Thereby, compared with the case where air remains in the gap 29, a higher coil cooling effect can be obtained. The resin filling port is formed in the upper coil housing part 19 or the lower coil housing part 18 or both. In the embodiment, as will be described later, the communication port 20 shown in FIG. 5 functions as a filling port. A preferable resin is an epoxy-based or polyester-based resin having high fluidity and adhesiveness. When heat dissipation is important, it is preferable to use a resin with excellent thermal conductivity.

In this embodiment, the coil 11 is composed of one conductor 31 having a square cross section. As shown in FIG. 10, two conductors 32 having a square cross section may be arranged in parallel (superposed vertically). In this case, since the skin resistance is reduced as compared with the case of a single conductor 31, a high-frequency current can be passed through the coil more efficiently. Further, by laying the conductors up and down, the area occupied by the coil 11 becomes the same as that of a coil made of one conductor. Regardless of the number of conductors, from the viewpoint of resin filling and insulating properties, it is preferable that the conductor 31 having a rectangular cross section be chamfered at its corners so that the resin flows smoothly around the conductor.

In the embodiment, the coil housing 13 is divided into the lower coil housing portion 18 and the upper coil housing portion 19, and the lower cable housing portion 26 is integrated with the upper coil housing portion 19. 31 and 32 are arranged efficiently.

Further, although the work of arranging the hard metal coil conductor in the spiral groove 28 is a very time-consuming work, in the embodiment, since the lower cable housing part 26 is integrated with the upper coil housing part 19, When the

coil conductors

31 and 32 are disposed in the spiral groove 28 of the coil housing part 18, the lower cable housing part 26 does not get in the way.

In the embodiment, as shown in FIG. 4, the lower cable housing portion 26 has an outer peripheral cylindrical wall 33 centering on the shaft 25 and a bottom wall 34 that closes the lower end of the outer peripheral cylindrical wall 33. The upper cable housing part 27 has an outer peripheral cylindrical wall 35 centered on the shaft 25 and a ceiling wall 36 that closes the upper end of the outer peripheral cylindrical wall 35. The lower cable housing portion 26 and the upper cable housing portion 27 are assembled to the lower cable housing portion 26 so that the upper cable housing portion 27 can rotate around the shaft 25, and a cable housing space 37 is formed inside them. .

As described above, the lower cable housing portion 26 is formed integrally with the upper coil housing portion 19. As shown in FIG. 5, the cable housing space 37 and the coil housing space 23 communicate with the region where the lower cable housing portion 26 and the upper coil housing portion 19 are integrated in the region where the

housing portions

26 and 19 are adjacent to each other. A communication port (communication passage) 20 is formed, and both end portions (

conductor end portions

16a and 16b) of the coil conductor are drawn from the coil housing space 23 to the cable housing space 37 through the communication port 20. Yes.

As described above, the communication port 20 is formed between the lower coil housing portion 18 and the upper coil housing portion 19 from the cable housing space 37 side because the cable housing space 37 and the coil housing space 23 are communicated with each other. It functions as a resin filling port for filling the coil housing space 23 with resin. Instead of the communication port 20 or in addition to the communication port 20, a filling port may be formed at an appropriate location of the upper coil housing portion 19, and the coil housing space 23 may be filled with resin through the filling port. .

As shown in FIGS. 4 and 5, a central cylindrical wall 38 is formed inside the lower cable housing portion 26 around the shaft 25 and in the center of the lower cable housing portion 26. An inner cylindrical wall 39 and an outer cylindrical wall 40 are formed concentrically on the inner side of the lower cable housing portion 26 and on the outer side of the central cylindrical wall 38. A conducting wire passage 41 is formed, and an outside conducting wire passage 42 is formed between the outer cylindrical wall 40 and the outer cylindrical wall 33, and the

conductor end portions

16a and 16b of the coil 11 are respectively connected to the inner conducting wire passage 41 and the outer conducting wire passage 42. Has been drawn. A part of the outer cylindrical wall 40 is cut away, so that one conductor end 16 a is drawn into the inner conductor passage 41.

As shown in FIG. 4, the upper cable housing portion 27 has a central cylindrical wall 43 formed around the shaft 25.

The lower cable housing portion 26 and the upper cable housing portion 27 are connected to the lower cable housing portion 26 so that the upper cable housing portion 27 is rotatable about the shaft 25. For this purpose, for example, as shown in FIG. 4, the lower cable housing portion 26 and the upper cable housing portion 27 are inserted through the hollow cylindrical collar 44 inside the central

cylindrical walls

38 and 43, and the hollow cylindrical collar 44. A bolt 45 is inserted into the bolt 45, stop rings 46 and 47 are attached to the lower end and upper end of the bolt 45, and a screw 48 is fixed to the lower end of the bolt 45 to be connected.

The upper cable housing portion 27 is formed with an inverted U-shaped opening 51 by cutting a part of the outer cylindrical wall 35 from its lower end, and through a bush 52 (see FIG. 6) attached to the opening 51. Thus, the cable 10 is connected. The bush 52 is designed so that the amount of protrusion into the upper cable housing portion 27 is as small as possible. Therefore, as will be described later, when the upper cable housing portion 27 rotates with respect to the lower cable housing portion 26, the bushing 52 does not contact the cable conductor and obstruct the rotation or limit the rotation angle.

As shown in FIG. 6, the cable portion located outside the cable housing 14 includes a sheath 53, but the cable portion located inside the cable housing 14 has a pair of cable conductors that are covered with insulation by removing the sheath. 54 and 55 are exposed. Although not shown, the

cable conductors

54 and 55 include a core material made of a conductive metal and an insulating material covering the periphery thereof. The

cable conductors

54 and 55 arranged on the inner side of the cable housing 14 are arranged in a spiral shape around the shaft 25 and are preferably wound around the shaft 25 in the same direction at least once. More specifically, as shown in FIG. 5, one of the portions of the

cable conductors

54 and 55 accommodated in the lower cable housing portion 26 is disposed in the inner conductor passage 41, and the other is the outer conductor passage 42. The two ends of the

cable conductors

54 and 55 are electrically connected to the corresponding coil conductor ends 16a and 16b via

appropriate connectors

56 and 57, respectively. The upper cable housing part 27 does not include a wall corresponding to the cylindrical wall of the lower cable housing part 26. Therefore, each part of the

cable conductors

54 and 55 accommodated in a spiral shape in the upper cable housing portion 27 can enlarge or reduce the spiral diameter. The

connection tools

56 and 57 may be any of solder, crimp terminals, and dedicated connectors.

Accordingly, when the upper cable housing portion 27 and the cable 10 connected thereto are rotated with respect to the lower cable housing portion 26, the

cable conductors

54 and 55 accommodated in the cable housing 14, particularly the upper cable housing portion 27. Each portion of the helix diameter expands or contracts depending on the direction of rotation. Therefore, when the position or direction of the coil unit 5 is changed, the upper cable housing part 27 rotates relative to the lower cable housing part 26 accordingly. As a result, the coil unit 5 can be oriented in an arbitrary direction and angle without being constrained by the cable 10, so that the coil unit 5 can be installed at an optimal position and state for the treatment content.

However, in order to prevent the upper cable housing portion 27 from being excessively rotated with respect to the lower cable housing portion 26, as shown in FIG. 5, the lower cable housing portion 26 and the upper cable housing portion 27 are respectively supported. The

rotation restriction portions

58 and 59 may be provided so that the upper cable housing portion 27 can rotate only within a predetermined angle range with respect to the lower cable housing portion 26. Specifically, when the upper cable housing portion 27 is rotated, the rotation restricting portion 59 of the outer cylindrical wall 35 provided in the upper cable housing portion 27 is brought into contact with the rotation restricting portion 58 of the lower cable housing portion 26, thereby rotating the upper cable housing portion 27. Is regulated. Preferably, the predetermined angle range is, for example, 140 to 180 degrees (± 70 to ± 90 degrees to the left and right).

As shown in FIG. 4, the length (height) of the hollow cylindrical collar 44 is slightly longer than the length obtained by adding the height of the central

cylindrical walls

38 and 43 in the upper and lower

cable housing portions

26 and 27. By providing a slight gap between the central

cylindrical walls

38 and 43 and the stop rings 46 and 47, the rotation of the upper cable housing portion 27 relative to the lower cable housing portion 26 is smoothly performed with less resistance.

In the present invention, not only the gap around the coil 11 accommodated in the coil housing 13 is filled with insulating resin, but also the conductor end of the coil drawn into the cable housing 14 as shown in FIG. It is preferable to cover 16a and 16b with resin 60. According to this embodiment, the

conductor end portions

16 a and 16 b do not vibrate in the cable housing 14 due to the Lorentz force. Therefore, when a magnetic stimulation current pulse is applied to the exciting coil, the coil conductor is momentarily displaced by the Lorentz force, and when the current is interrupted, the vibration action is repeated, such as fatigue failure of the conductor, Noise due to vibration may occur, but there is no problem that the end portion of the vibrating coil conductor contacts other parts (housing, cable) and is damaged. Although not shown, a sheet made of a material having excellent slipperiness (for example, polytetrafluoroethylene, polyethylene, polyacetal) is disposed on the resin 60 so that the

cable conductors

54 and 55 receive the friction received from the filling resin 60. It is preferable to make it as small as possible.

It is preferable to cover both ends of the

cable conductors

54 and 55 connected to the coil conductor ends 16 a and 16 b with the resin 60. According to this embodiment, there is no problem that the

cable conductors

54 and 55 that vibrate due to the Lorentz force come into contact with other parts (housing, cables, and other cable portions) and are damaged.

The

cable conductors

54 and 55 covered with the resin 60 are regions having a predetermined length from the connection portions with the

conductor end portions

16a and 16b so that the free rotation of the upper cable housing portion 27 with respect to the lower cable housing portion 26 is not hindered. It is preferable to limit to. For example, as shown in FIG. 5, the

cable conductors

54 and 55 accommodated in the lower cable housing portion 26 are connected to the

conductor end portions

16 a and 16 b at both ends, and the inner conductor passage 41 and the outer conductor passage 42. For example, it is arranged in the counterclockwise direction in the figure along the bottom. Further, the

cable conductors

54 and 55 rise to a predetermined height while being wound along the inner conductor passage 41 and the outer conductor passage 42, and then appear on the resin 60 (see FIG. 7).

In order to avoid the cable conductor portion (free portion) appearing from the resin 60 from coming into contact with the filling resin 60, as shown in FIG. 8, a flexible and slippery resin (for example, fluororesin, silicone rubber, elastomer) May be filled with a cable conductor guide block 65 made of In this embodiment, as shown in the figure, it is preferable to form two conductor guide inclined

passages

66 and 67 in the cable conductor guide block 65 and accommodate the

cable conductors

54 and 55 in these

inclined passages

66 and 67. In this case, the vibration of the

cable conductors

54 and 55 caused by the Lorentz force is absorbed by the flexible block 65, so that the

cable conductors

54 and 55 do not come into contact with the housing or the solidified resin to be damaged. Further, there is a possibility that fatigue is caused by a large repeated bending stress acting on the boundary between the cable portion (fixed portion) buried in the resin 60 and the cable conductor portion (free portion) floating from the resin 60 by Lorentz force. , Since it is held by the flexible block 65, the repetitive stress acting on the boundary between the fixed portion and the free portion is minimized.

The above-described embodiment is not limited and can be variously modified.

For example, the coil may be a coil other than the eccentric spiral 8-shaped coil, for example, a circular coil or a non-coiled 8-shaped coil.

The coil conductor end and the cable conductor may be connected to a place other than the inside of the cable housing, for example, inside the coil housing.

In the cable housing, the resin covering the end portion of the coil conductor and the resin covering the cable conductor may be the same resin or different resins. In the latter case, the resin covering the cable conductor may be a softer resin than the resin covering the coil conductor end.

When filling the resin into the cable housing, the surface of the filled resin is made of a material with excellent slipperiness (in order to avoid contact between the filled resin and the free part of the cable conductor not covered by the resin ( For example, it is preferable to cover it with a sheet (not shown) of fluorine material.

The number of coil conductors housed in the groove of the coil housing is not limited to one or two, but may be three or more. In consideration of workability and skin effect, the number of coil conductors accommodated in the groove is preferably two. Further, when a plurality of conductors are arranged in the groove, it is preferable that the plurality of conductors are stacked in the vertical direction.

The coil 11 is not limited to a conductor having a rectangular cross section, but may be a conductor having a circular, triangular, pentagonal, or other polygonal cross section. Further, a rectangular wire or a litz wire may be used as the conductor of the coil 11.

The coil 11 is not limited to a coil with an insulation coating, and may be a coil without an insulation coating. In the case of a coil without insulation coating, there is an advantage that the interval between conductors adjacent to each other in the radial direction of the spiral can be reduced.

The cable may be connected to the cable housing from the tangential direction of the cable housing rather than from the radial direction.

1: Transcranial magnetic stimulation system 2: Patient 3: Patient support mechanism (support part)
4: Magnetic stimulation device 5: Coil unit (coil device)
6: Control unit 7: Positioning mechanism 8: Support mechanism 10: Cable 11: Coil 12: Conductor 13: Coil housing 14: Cable housing 15: Spiral portion 16 (16a, 16b): Conductor end 18: Lower coil housing portion 19 : Upper coil housing portion 21: Upper surface shape 22: Lower surface shape 23: Coil housing space 25: Shaft 26: Lower cable housing portion 27: Upper cable housing portion 28: Spiral groove 29: Clearance 30: Resin 31, 32: Conductor 33: Outer cylindrical wall 34: Bottom wall 35: Outer cylindrical wall 36: Ceiling wall 37: Cable housing space 38: Central cylindrical wall 39: Inner cylindrical wall 40: Outer cylindrical wall 41: Inner conductor passage 42: Outer conductor passage 43: Central cylinder Wall 44: Hollow cylindrical collar 45: Bolt 46, 47: Stop ring 48: Screw 51: Opening 52: Bush 53: Screw Scan 54, 55: cable leads 56, 57: connector 58, 59: the rotation regulating portion 60: Resin 65: Block 66: inclined path

Claims

A coil device used in a magnetic stimulation treatment system,
A coil housing;
A cable housing;
A communication path communicating the internal space of the coil housing and the internal space of the cable housing;
A coil comprising a coil conductor housed in the coil housing;
A pair of conductors that penetrates the cable housing and is drawn from the outside to the inside of the cable housing and electrically connected to both ends of the coil conductor;
The cable housing has a fixed housing part integrally connected to the coil housing, and a rotating housing part rotatably connected to the fixed housing part about a predetermined axis,
The coil device characterized in that the pair of conducting wires penetrates the rotating housing portion.
The coil device according to claim 1, wherein both ends of the pair of conductive wires and the coil conductor are connected inside the coil housing or inside the cable housing.
The coil device according to claim 1 or 2, wherein the inner conductor portions of the pair of conductors located inside the cable housing are arranged in a circumferential direction around the axis.
The coil device according to claim 3, wherein inner conductor portions of the pair of conductors located inside the cable housing are arranged in one circumferential direction centering on the axis.
The coil device according to claim 3 or 4, wherein the inner conductor portion is wound one or more times in a circumferential direction around the axis.
The coil device according to any one of claims 1 to 5, wherein the predetermined axis is located at a center of the cable housing.
The coil device according to claim 6, wherein the inner conductor portion located inside the cable housing extends spirally around a predetermined axis.
The coil device according to any one of claims 1 to 7, wherein the cable housing includes a restricting portion that restricts a rotation angle of the rotating housing portion within a predetermined range.
The coil device according to claim 8, wherein the predetermined range is 180 degrees or less.
The coil device according to any one of claims 1 to 9, wherein the coil includes one conductor or a plurality of conductors arranged in parallel.
The coil device according to claim 10, wherein the pair of conductive wires has a shield disposed around the pair of conductive wires.
The coil device according to any one of claims 1 to 11, wherein an outer conductor portion of the pair of conductors located outside the cable housing is covered with an insulating sheath.
The coil device according to claim 12, wherein the outer conductor portion is fixed to the cable housing portion via a bush.
The coil housing has a spiral groove;
The coil device according to any one of claims 1 to 13, further comprising a coil arranged spirally along the groove.
15. The coil device according to claim 14, wherein the coil includes first and second conductors arranged to overlap in the depth direction of the groove.
The coil device according to claim 15, wherein the first conductor and the second conductor have a rectangular cross section.
The coil device according to claim 15 or 16, wherein the groove has a rectangular cross section corresponding to the first conductor and the second conductor arranged to overlap in the depth direction of the groove.
The coil device according to any one of claims 14 to 17, wherein the spiral groove is formed along a predetermined curved surface.
The coil device according to any one of claims 14 to 18, wherein the curved surface is a spherical surface.
The coil device according to any one of claims 14 to 19, further comprising an insulating resin filled in a gap between the groove and the coil.
21. The coil device according to claim 20, wherein the resin is filled between the coil housing portion and the cable housing portion.
The coil device according to any one of claims 1 to 21, wherein the coil is made of a conductor having no insulation coating on a surface thereof.
At least one of the coil housing part and the cable housing part,
The coil device according to any one of claims 20 to 22, wherein a filling port for the resin is formed.
Both end portions of the coil conductor located inside the cable housing, and both end conductor portions that are part of the conductor located inside the cable housing and are electrically connected to at least both end portions of the coil conductor, The coil device according to any one of claims 1 to 23, wherein the coil device is fixed by being surrounded by a resin of an insulating material filled in the cable housing.
Both end portions of the coil conductor located inside the cable housing are fixed with a first resin, and are electrically connected to at least both end portions of the coil conductor that are part of the conducting wire located inside the cable housing. The both-end conductive wire portion connected to the second resin is fixed with a second resin, and the second resin is softer than the first resin. Coil device.
The conductive wire part has a free part not fixed to the resin following the fixed part fixed to the resin connected to both ends of the coil conductor, and the free part is held by an elastic member. The coil device according to any one of claims 20 to 25.
A magnetic stimulation treatment system comprising the coil device according to any one of claims 1 to 26.