Electrode device for blocking or modulating nerves in the body

Abstract

The electrode device according to the present invention is for blocking or regulating nerves in the body, and includes a main body having a shaft, an electrode unit formed to protrude from one end of the shaft and for blocking or regulating at least a part of the nerves in the internal vessel, and an electrode guide supporting the electrode unit and guiding the electrode unit to contact the internal vessel, the electrode guide having a plurality of joints protruding sequentially from one end of the shaft while forming a curved winding path.

Description

Technical Field

[0001] The present invention relates to an electrode device for blocking or regulating nerves in the body.

Background Art

[0002] Neurotomy refers to a procedure that damages specific nerves to control an autonomic nervous system that is abnormally and overly activated. For example, renal denervation can treat hypertension and heart disease by damaging the renal sympathetic nerves leading to the kidneys, and pulmonary denervation can treat lung diseases by damaging the parasympathetic nerves leading to the lungs.

[0003] Nerves are usually wrapped around the outer walls of tubes such as blood vessels and bronchi. It may be necessary to wrap around the outer walls of such tubes to measure nerve signals, transmit electrical stimulation to the nerves, or transmit various energies to damage or destroy the nerves.

[0004] For example, when performing a procedure on the renal artery, the diameter of the main renal artery to be treated is 5 - 7 mm, and sometimes the accessory renal artery with a diameter of 1 - 2 mm may also be the target. In addition, the tubes with nerves distributed vary in size from person to person and change in size depending on the location.

[0005] In performing such a procedure, it is important to accurately position the component including the electrode formed at the end of the catheter so that it wraps around the outer wall of the tube. Specifically, in order to effectively block or regulate the nerves, the outer wall of the tube where the nerves are distributed must be wound circumferentially, and the operation of arranging the component with the electrode formed on the tube in a wound state must be performed reliably and quickly.

Summary of the Invention

Problems to be Solved by the Invention

[0006] One object of the present invention is to provide an electrode device having a configuration in which a plurality of unit elements are sequentially projected along a preset path and guide the electrodes to be wound around a tube in the body.

[0007] Another object of the present invention is to provide an electrode device having a configuration in which a curved path along which a plurality of unit elements are arranged is completely wound around a tube in the body.

[0008] Still another object of the present invention is to provide an electrode device in which a configuration for guiding electrodes to which a plurality of unit elements are connected can be manufactured from a single member without assembly.

[0009] However, the technical problems to be solved by the present embodiment are not limited to the technical problems as described above, and other technical problems may exist.

Means for Solving the Problems

[0010] To achieve one object of the present invention, an electrode device according to the present invention is for blocking or regulating a nerve in the body, and includes a main body having a shaft, and an electrode unit formed to project from one end of the shaft and configured to block or regulate at least a part of the nerve of the tube in the body, and an electrode guide that supports the electrode unit and guides the electrode unit to contact the tube in the body, wherein the electrode guide includes a plurality of joint portions that are sequentially projected while forming a curved winding path from one end of the shaft.

[0011] The electrode guide is formed to sequentially penetrate the plurality of joint portions, and further includes a wire that provides a pulling force for winding the plurality of joint portions in a direction around the tube, and the wire may be projected in an amount smaller than an amount by which the plurality of joint portions are projected per unit time during an operation in which the wire is projected together with the plurality of joint portions from one end of the shaft.

[0012] To achieve other objects of the present invention, the winding path may include a first path formed to have a first radius of curvature by a part of the plurality of joints, and a second path formed by another part of the plurality of joints protruding following a part of the plurality of joints and formed to have a second radius of curvature larger than the first radius of curvature.

[0013] To achieve still other objects of the present invention, the plurality of joints may be integrally formed of an elastically deformable material, and a winding support groove may be formed between adjacent joints of the electrode guide so as to be deformed while being disposed on the winding path and at least a part thereof being closed.

[0014] The means for solving the above-described problems is merely an example and should not be construed as intending to limit the present invention. In addition to the above-described exemplary embodiments, there may be additional embodiments described in the drawings and the detailed description of the invention.

Effects of the Invention

[0015] According to the electrode device of the present invention, in order to closely adhere the electrode to the outer surface of the tube and efficiently transmit energy, the position of the electrode unit can be accurately adjusted by configuring the electrode guide with a plurality of joints. Here, since the plurality of joints protrude and at the same time form a winding path, the space required for the operation of the electrode guide is minimized and can be precisely controlled.

[0016] Furthermore, according to the electrode device of the present invention, by forming the radius of curvature of the winding path to be different from each other step by step, the shape of the electrode guide can be precisely designed, and the electrode guide can be positioned so as to be completely wound around the tube in the body. Thereby, an operation for blocking or adjusting a nerve can be effectively performed.

[0017] On the one hand, according to the electrode device of the present invention, while realizing the driving of a plurality of joint parts, an electrode guide in which the joint parts are integrated is formed, thereby simplifying the manufacturing process of the electrode device and miniaturizing the product, and the manufacturing cost can be reduced.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3a

Figure 3b

Figure 3c

Figure 3d

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those having ordinary knowledge in the technical field to which the present invention pertains can easily implement it. However, the present invention can be embodied in various different forms and is not limited to the embodiments described herein. And in the drawings, in order to clearly explain the present invention, parts not related to the explanation are omitted, and similar reference numerals are given to similar parts throughout the specification.

[0020] Throughout the specification, when a part is described as being "connected" to another part, this includes not only the case where it is "directly connected", but also the case where it is "electrically connected" with other elements interposed therebetween. Also, when a part is described as "including" a certain component, this means that, unless otherwise stated to the contrary, it does not exclude other components, but may further include other components, and it should not be understood as precluding the existence or addition possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. Furthermore, throughout the specification of the present application, when a member is described as being "on" another member, this includes not only the case where a member is in contact with another member, but also the case where there are other members between the two members.

[0021] FIG. 1 is a side view of an electrode device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the electrode guide shown in FIG. 1. FIGS. 3a to 3c are diagrams showing the process in which an electrode guide according to an embodiment of the present invention protrudes along a winding path. FIG. 3d is a diagram showing the winding path along which the electrode guide according to an embodiment of the present invention moves. Also, FIG. 4 is a perspective view showing the joint part and the tip joint shown in FIG. 2, FIG. 5 is an exploded perspective view of a part of the joint part shown in FIG. 4, and FIG. 6 is a side view of a part of the joint part shown in FIG. 4. FIG. 7 is a diagram showing the connection between the electrode unit and the tip joint shown in FIGS. 3a to 3c.

[0022] Referring to FIG. 1, an electrode device 100 according to an embodiment of the present invention includes a main body 110, an electrode unit 120, and an electrode guide 130. The main body 110 may include a shaft 111 extending in one direction, a grip portion 112 formed to be connected to the shaft 111 so that an operator can hold it, a guide operation portion 113 formed on the grip portion 112 to operate the operation of the electrode guide 130, and an electrode operation portion 114 formed on the grip portion 112 to operate the energy transmission of the electrode unit 120. Inside the main body 110, elements for driving and controlling the electrode unit 120 and the electrode guide 130 may be arranged.

[0023] The electrode unit 120 is formed to protrude from one end of the shaft 111 and is configured to block or adjust at least a part of the nerves distributed in tissues including tubes in the body by an operator's operation or the like.

[0024] Referring to FIG. 2, the electrode unit 120 may include a base layer 121, an electrode layer 122, and a sensor unit 123. In the electrode device 100 according to the present invention, an electrode may be wound around the outer surface of a tube or tubular tissue V in the body, and energy may be transmitted through the electrode. For this purpose, the base layer 121 may be made of a flexible printed circuit board (Flexible PCB).

[0025] The electrode layer 122 is formed on the base layer 121. In the embodiment of FIG. 2, the electrode layer 122 may be composed of two electrodes extending parallel to each other on the base layer 121. In this embodiment, the base layer 121 and the electrode layer 122 may be configured to extend circumferentially and wind around a tube or the like in the body.

[0026] The electrode layer 122 may be made of a material that is harmless to the human body and can conduct electricity, such as stainless steel, gold, etc., in order to block or denervate or control or modulate nerves. Also, the electrode layer 122 may transmit various types of energy from an energy source generator. For example, radio-frequency (RF) energy, electrical energy, laser energy, ultrasonic energy, high-intensity focused ultrasound energy, cryogenic energy, and other thermal energies may be utilized.

[0027] Also, the electrode layer 122 may be embodied in a flexible printed circuit board (Flexible PCB) for transmitting RF energy, a transducer for transmitting ultrasonic energy, a metal electrode for transmitting high high-voltage energy, etc., and may transmit energy for damaging nerves.

[0028] Also, a sensor unit 123 may be formed on the base layer 121. In one example, the sensor unit 123 may be a thermocouple that contacts a tube in the body and measures temperature. When a neurotomy is performed by the electrode device 100 according to the present invention, the sensor unit 123 may monitor the temperature of the surgical site. The sensor unit 123 may be, for example, a thermocouple composed of a pair of copper and constantan. In another example, the sensor unit 123 may measure the signal of the nerve of the tube.

[0029] On the other hand, referring to FIG. 7, the electrode unit 120 may further include a top layer 124. The top layer 124 may be formed so as to overlap at least a part of each of the base layer 121 and the electrode layer 122.

[0030] The electrode guide 130 functions to bring the electrode unit 120 into contact with a tube inside the body. The electrode guide 130 supports the electrode unit 120 and guides it so as to bring the electrode unit 120 into contact with a tube inside the body.

[0031] Referring further to FIGS. 3A to 3D and FIG. 4, the electrode guide 130 provided in the present invention includes a plurality of joint portions 131. The plurality of joint portions 131 are moved while forming a curved winding path P so as to be wound around a tube V inside the body with the electrode unit 120 interposed therebetween. For example, the state shown in FIGS. 2 and 3C may be a state in which the plurality of joint portions 131 are arranged along the curved winding path P.

[0032] According to the electrode device 100 according to the present invention, the operation of the electrode guide 130 may be implemented by a joint portion 131 driving method in order to closely adhere the electrode layer 122 to the outer surface of a tube inside the body and efficiently transmit energy. By using a joint type operation method, the operation timing and shape of the electrode guide 130 can be directly controlled, and the reliability of repeated operations can be improved. Therefore, customized and delicate treatments can be performed using the electrode device 100 according to the present invention.

[0033] According to an embodiment of the present invention, the electrode guide 130 may be housed inside the shaft 111 together with the electrode unit 120 and may protrude while forming a curved winding path forward F from one end for treatment. As shown in FIGS. 3A to 3D, the plurality of joint portions 131 are moved along the curved winding path P while being sequentially pulled out, and may be wound around the tube V as a whole. The electrode guide 130 may be positioned away from the outer peripheral surface of the tube, and the electrode unit 120 disposed on the wound inner side of the electrode guide 130 may be closely adhered to the outer peripheral surface of the tube V. Since the plurality of joint portions 131 according to the present invention are pulled out along the winding path P wound from the shaft 111 to the tube V, the space in which the electrode guide 130 operates can be minimized. Thereby, an operation of safely and accurately blocking or adjusting a nerve can be performed even in a narrow space.

[0034] Hereinafter, with further reference to FIGS. 5 and 6, the detailed configurations of the electrode guide 130 and the joint portion 131 will be described.

[0035] The electrode guide 130 may further include a tip joint 132 and a wire 133. The tip joint 132 supports the electrode unit 120 and may be coupled to the ends of a plurality of sequentially connected joint portions 131. The tip joint 132 may protrude from one end of the shaft 111 ahead of the plurality of joint portions 131. As shown in FIGS. 3c and 7, the tip joint 132 may be positioned close to the tube V in the body, and may have a tapered shape in which the width or thickness becomes thinner towards the end so as to prevent interference with the electrode unit 120 or to maximize the surface wound around the tube in the body. The tip joint 132 may have a structure in which the end of the electrode unit 120 can be fastened and fixed. The electrode unit 120 may cover at least a part of the surface of the tip joint 132 facing the tube V and may be coupled to the tip joint 132.

[0036] The wire 133 may be formed to sequentially penetrate a plurality of joint portions 131. Referring to FIG. 5, in order to penetrate the wire 133, through holes 131c may be formed in the joint portion 131 in the longitudinal direction. The ends of the wire 133 sequentially penetrating the through holes 131c may be coupled and fixed to the tip joint 132, and the wire 133 is slidable with respect to each joint portion 131 in the longitudinal direction within the through hole 131c. Thereby, the wire 133 can guide the plurality of joint portions 131 and the tip joint 132 to be arranged on the winding path, and provide a pulling force in the direction of winding the plurality of joint portions 131 and the tip joint 132 around the tube V.

[0037] The wire 133 may be operated to protrude from one end of the shaft 111 together with the plurality of joint portions 131. At this time, it may be designed such that the amount by which the wire 133 protrudes is smaller than the amount by which the plurality of joint portions 131 protrude per unit time. Thereby, the wire 133 can provide a force for pulling the plurality of joint portions 131 along a curved path.

[0038] On the other hand, the joint portion 131 may include a hinge portion 131a and a winding support portion 131b. The hinge portion 131a is configured for rotatable connection with adjacent joints, and may be formed on one or both sides in the longitudinal direction in which the joint portions 131 are connected in series. As shown in the drawing, the hinge portion 131a may form a rotation axis in a direction intersecting the longitudinal direction, and may be connected to the hinge portion 131a of an adjacent joint portion 131. A hinge pin (not shown) may be inserted into each hinge portion 131a in the direction in which the rotation axis is formed to be fastened.

[0039] The winding support portion 131b is configured to support the plurality of joint portions 131 on the winding path, and may be formed on one or both sides in the longitudinal direction so as to be supported by adjacent joint portions 131. As shown in the drawing, the winding support portion 131b may be formed at a position adjacent to the hinge portion 131a in the direction inside the electrode guide 130 (wrapped around the joint portion 131). The winding support portion 131b may be composed of, for example, a surface having a preset angle and area, and the wound form of the electrode guide 130 may be fixed by being supported in surface contact with an adjacent winding support portion 131b.

[0040] In the embodiments of FIGS. 3a and 3c, when the wire 133 is pulled rearward relative to the electrode guide 130 (when the length of the wire 133 drawn from the shaft 111 is smaller than that of the electrode guide 130), a tension may be applied to the wire 133 in the direction of winding the electrode guide 130. On the contrary, the winding support portion 131b may provide a force for supporting the joints 131 of each other in a direction that suppresses the winding of the electrode guide 130. By the wire 133 and the winding support portion 131b balancing the forces in opposite directions, the electrode guide 130 can be fixed on the winding path.

[0041] More specifically, the through hole 131c may be formed at a position away from the rotation center of the hinge portion 131a toward the inside (the upper direction in FIG. 6). When the wire 133 with its end fixed to the chip joint 132 is pulled relatively rearward (the right side direction in FIG. 6), the plurality of joint portions 131 may be arranged to bend inward as a whole. If the joint portion 131 is rotated with respect to the adjacent joint portion 131 around the hinge portion 131a and the winding support portions 131b are brought into contact with each other, the positions of the plurality of joint portions 131 can be fixed. At this time, the wire 133 may provide a force (tension) for the winding support portions 131b to support each other. By the winding support portions 131b supporting the adjacent joint portions 131 of each other, the plurality of joint portions 131 can be fixed in a position away from the tube V.

[0042] As described above, the electrode guide 130 of the electrode device 100 according to the present invention can maintain an accurate path and position during repeated operations by being aligned on the winding path and having its position change suppressed by the wire 133 and the winding support portion 131b.

[0043] Hereinafter, embodiments will be described in which the shape of the electrode guide 130, that is, the winding path P can be set according to the difference in the shape of the joint portion 131.

[0044] According to an embodiment of the present invention, the electrode guide 130 may include a first joint group 131x and a second joint group 131y. That is, the plurality of joint portions 131 may be divided into a first joint group 131x and a second joint group 131y having different shapes from each other.

[0045] In the embodiments of FIGS. 2 to 7, the first joint group 131x may include a joint portion 131 having a first length L1 in the longitudinal direction, and the second joint group 131y may include a joint portion 131 having a second length L2 longer than the first length L1. In this embodiment, the first joint group 131x and the second joint group 131y may each include, for example, six joint portions 131 having the same length.

[0046] Due to such a difference in length, the first joint group 131x can form a first radius of curvature, and the second joint group 131y can form a second radius of curvature larger than the first radius of curvature. As can be seen from FIG. 3c, a joint portion having a relatively short length (the first joint group 131x) can form a small radius of curvature, and a joint portion having a long length (the second joint group 131y) can form a large radius of curvature.

[0047] More specifically, the first joint group 131x forming the first radius of curvature may be disposed closer to the chip joint 132, and the second joint group 131y forming the second radius of curvature may be disposed closer to the shaft 111.

[0048] Referring to FIG. 3d, the winding path P may include a first path P1 and a second path P2. The first path P1 may be formed to have a first radius of curvature by the first joint group 131x which is a part of the plurality of joint portions. The second path P2 may be formed to have a second radius of curvature by the second joint group 131y which is another part that sequentially protrudes following a part of the plurality of joint portions.

[0049] If the winding path forms a first path with a smaller radius of curvature by the joint portion 131 disposed closer to the chip joint 132, a path can be created for the chip joint 132 to enter the space between the tube in the body and the shaft 111 as shown in FIGS. 3c and 3d. For example, the electrode guide 130 including the joint portion 131 may entirely have a spiral shape.

[0050] Thus, the electrode device 100 according to the present invention can easily and precisely set the operating position of the electrode guide 130 through the length design of the plurality of joint portions 131. Also, excellent repeatability of the winding path P can be ensured. Further, the winding path P can be subdivided by the radius of curvature and positioned so that the electrode guide 130 is completely wound around the tube in the body. Therefore, the nerves around the tube can be entirely blocked or adjusted in one operation, enhancing the surgical effect.

[0051] The above-described embodiments of FIGS. 2 to 7 are based on the premise that all the joint portions 131 have a constant angle of inclination with respect to the adjacent joint portion 131 when forming the winding path. Specifically, the joint portion 131 may be arranged to intersect the adjacent joint portion 131 at an angle of, for example, 30 degrees in the length direction. For this purpose, the surfaces of the winding support portions 131b of each joint portion 131 may have inclination angles θ1, θ2 of, for example, 75 degrees with respect to the length direction.

[0052] On the other hand, the electrode guide 130 of the present invention may have another example in which a winding path having a plurality of radii of curvature is embodied on the premise that the lengths of the joint portions 131 are the same. As described above, the inclination angles of the adjacent joint portions 131 on the winding path may be determined by the angle at which the surface of the winding support portion 131b is inclined with respect to the length direction of the joint portion 131 in the design of each joint portion 131.

[0053] Specifically, the first joint group may include a joint portion where the surface of the winding support portion has a first inclination angle with respect to the length direction, and the second joint group may include a joint portion where the surface of the winding support portion has a second inclination angle greater than the first inclination angle. Thus, when the first joint group having the first inclination angle has a first radius of curvature, the second joint group having the second inclination angle can be arranged to have a second radius of curvature greater than the first radius of curvature.

[0054] Accordingly, even if the lengths of all the joint portions are formed to be the same as each other, by designing with different inclination angles of the winding support portion, a winding path with a changing radius of curvature can be realized.

[0055] In the above, an embodiment in which the joint portion 131 is formed by two joint groups has been described. However, by designing the electrode guide 130 to have two or more joint groups with different shapes respectively, it is also possible to design a more delicate winding path.

[0056] On the other hand, referring to FIG. 7, the chip joint 132 may include a first clamp piece 132a and a second clamp piece 132b in order to fix or support the end portion of the electrode unit 120. Referring to FIG. 7, the first clamp piece 132a may be formed to be fixed to the joint portion 131. The second clamp piece 132b may be coupled to the first clamp piece 132a while sandwiching a part of the electrode unit 120, and may have the tapered shape described above. Further, the electrode unit 120 according to the present invention may be extended so as to wrap the second clamp piece 132b and be coupled so as to be inserted between the first clamp piece 132a and the second clamp piece 132b. That is, the end portion of the electrode unit 120 may be sandwiched and fixed when the first clamp piece 132a and the second clamp piece 132b are fastened. In order to fix the wire 133, a fixing plate 132b3 may be further interposed between the first clamp piece 132a and the second clamp piece 132b.

[0057] FIG. 8 is a perspective view of an electrode guide 230 according to another embodiment of the present invention. Hereinafter, an embodiment in which the joint portion 231 of the electrode guide 230 of the present invention is integrally formed will be described.

[0058] The joint portion 231 of the electrode guide 230 according to another embodiment of the present invention is made of a material such as an elastically deformable polymer, and a plurality of joint portions 231 may be integrally formed, for example, may have a living hinge structure.

[0059] As shown in FIG. 8, each joint portion 231 may be integrally formed with the joint portions 231 adjacent to each other in the length direction, and a winding support groove 231b may be formed between the adjacent joint portions 231. The winding support groove 231b may be such that at least a part of the space of the groove is reduced or closed while the joint portion 231 is positioned on the winding path.

[0060] Specifically, the winding support groove 231b may be formed to be recessed in a wedge shape on the inner surface of the electrode guide 230 (the surface facing the electrode unit 120). When the joint portion 231 protrudes, the side surfaces of the wedge-shaped winding support groove 231b may be in contact with and supported by each other.

[0061] In addition, the electrode guide 230 in another embodiment of the present invention may further include a wire 233. The wire 233 may be formed to sequentially penetrate through the plurality of joint portions 231. Similar to the above-described embodiment, the wire 233 can guide the electrode guide 230 to be deformed into a shape wound around a tube by being drawn out from the shaft 111 at a shorter distance than the electrode guide 230, and can provide a force for supporting at least a part of the winding support groove 231b to be closed.

[0062] According to the electrode guide 230 according to another embodiment of the present invention, while embodying the drive of the joint part that ensures reliable operation, the electrode guide 230 can be integrally manufactured. Since there is no need for the process of manufacturing and assembling the joint elements individually, simplification of the manufacturing process, miniaturization of the product, and reduction of manufacturing costs are possible.

[0063] The above description of the present invention is for illustrative purposes, and those having ordinary knowledge in the technical field to which the present invention pertains should be able to understand that it can be easily deformed into other specific forms without changing the technical idea and essential features of the present invention. Therefore, it should be understood that the above-described embodiments are exemplary in all aspects and not restrictive.

[0064] Also, the scope of the present invention is shown by the claims described later rather than the above detailed description, and all changes or modified forms derived from the meaning and scope of the claims and the equivalent concept thereof should be construed as being included in the scope of the present invention.

Claims

1. In an electrode device for blocking or regulating nerves in the body, a main body having a shaft, an electrode unit formed to be drawn out from one end of the shaft and configured to block or regulate at least a part of the nerves in the tube in the body, and an electrode guide for guiding the electrode unit into contact with the tube in the body, wherein the electrode guide includes a plurality of joint portions that sequentially protrude from one end of the shaft to form a winding path of a curve, a tip joint coupled to the ends of the plurality of sequentially connected joint portions and protruding from one end of the shaft ahead of the plurality of joint portions, and a wire that penetrates through the plurality of joint portions and is coupled to the tip joint to apply a pulling force in a direction in which the plurality of joint portions are wound around the tube, and the electrode unit is separated from the plurality of joint portions, and an end of the electrode unit is fixed to the tip joint. An electrode device.

2. The wire is characterized in that, during operation of protruding from one end of the shaft together with the plurality of joint portions, the wire protrudes in an amount smaller than the amount by which the plurality of joint portions protrude per unit time. The electrode device according to claim 1.

3. The joint portion includes a hinge portion formed on one or both sides in a length direction in which the plurality of joint portions are arranged and connected, and a through hole formed along the length direction at a position away from the rotation center of the hinge portion so that the wire is inserted therethrough. The electrode device according to claim 1.

4. The joint portion includes a hinge portion formed on one or both sides in a length direction in which the plurality of joint portions are arranged and connected, and a winding support portion formed on one or both sides in the length direction so as to be supported by adjacent joint portions, wherein the plurality of joint portions are positioned away from the tube by being supported by the winding support portion by adjacent joint portions. The electrode device according to claim 1.

5. The winding path includes a first path formed to have a first radius of curvature by a part of the plurality of joint portions, and a second path formed by another part of the plurality of joint portions that protrude following a part of the plurality of joint portions and formed to have a second radius of curvature larger than the first radius of curvature. The electrode device according to claim 1.

6. The electrode device according to claim 1, wherein at least a part of the surface of the chip joint facing the tube is covered by the electrode unit, and the chip joint has a tapered shape that becomes thinner toward the end.

7. The electrode device according to claim 1, wherein the plurality of joint portions are integrally formed of an elastically deformable material, and winding support grooves are formed between the adjacent joint portions in the electrode guide so as to be arranged on the winding path and at least a part thereof is deformed to be closed.

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