Stimulating coil and device

Abstract

The embodiment of the invention discloses a stimulation coil and device. The stimulation coil comprises a diameter part and at least one arc-shaped part, the curvature radius of the diameter part is greater than that of the arc-shaped part; the stimulation coil further comprises an input end and an output end located on the arc-shaped part, the input end and the output end are symmetrically arranged about a preset symmetry axis, and the plane where the preset symmetry axis is located intersects with the diameter part. According to the technical scheme, the strip-shaped induction electric field is formed to act on the target area, and the stimulation accuracy and effect on the target area are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic stimulation, and particularly to a stimulation coil and a device. Background Art

[0002] At present, a magnetic stimulation system usually consists of a pulse generator, a controller, and a stimulation coil. Among them, the characteristics such as the intensity distribution and symmetry of the magnetic field excited by the stimulation coil are of great significance for the quantification of magnetic stimulation. Studying the distribution and symmetry of the coil is beneficial to the applied research of the magnetic stimulation coil and promotes the development of neuromodulation technology.

[0003] However, the common magnetic stimulation coils in the existing market are mostly circular coils, figure-eight coils, H coils, etc. The effective stimulation range is a circular area or an irregular area, and the distribution of the magnetic field intensity generated by them is uneven in space. The magnetic field cannot be accurately focused on the target area, and there are differences in the magnetic field stimulation intensity received by different neurons in the target area. Some neurons may be stimulated too strongly and produce abnormal reactions, while some neurons may not be effectively activated due to insufficient stimulation intensity. This non-uniformity of the magnetic field intensity will affect the normal activities and signal conduction of neurons, thereby reducing the effect and accuracy of stimulation treatment, and the stimulation effect on the target area is not ideal. Summary of the Invention

[0004] An embodiment of the present invention provides a stimulation coil and a device to generate a strip-shaped induced electric field acting on a target area and improve the neuromodulation effect of the target area.

[0005] In a first aspect, an embodiment of the present invention provides a stimulation coil, including: a diameter part and at least one arc part;

[0006] The radius of curvature of the diameter part is greater than the radius of curvature of the arc part;

[0007] The stimulation coil further includes an input end and an output end located at the arc part, and the input end and the output end are symmetrically arranged with respect to a preset symmetry axis, and the plane where the preset symmetry axis is located intersects the diameter part.

[0008] Optionally, the stimulation coil includes one arc part;

[0009] The diameter part includes a first end and a second end arranged oppositely, and the arc part includes a third end and a fourth end arranged oppositely;

[0010] The first end is connected to the third end, and the second end is connected to the fourth end.

[0011] Optionally, the arc portion includes M turns of arc-shaped sub-coils, and the M turns of arc-shaped sub-coils are arranged along the radial direction of the arc portion; where M≥2 and M is an integer;

[0012] The third end of the first turn of the arc-shaped sub-coil is the input end, and the fourth end of the Mth turn of the arc-shaped sub-coil is the output end;

[0013] Or, the fourth end of the first turn of the arc-shaped sub-coil is the input end, and the third end of the Mth turn of the arc-shaped sub-coil is the output end;

[0014] Or, the third end of the first turn of the arc-shaped sub-coil is the output end, and the fourth end of the Mth turn of the arc-shaped sub-coil is the input end;

[0015] Or, the fourth end of the first turn of the arc-shaped sub-coil is the output end, and the third end of the Mth turn of the arc-shaped sub-coil is the input end.

[0016] Optionally, the stimulation coil includes N arc portions, and the N arc portions are arranged in sequence along the circumferential direction of the diameter portion; where N≥2 and N is an integer;

[0017] The diameter portion includes a first end and a second end arranged opposite to each other. The first arc portion includes a fifth end on the side away from the Nth arc portion, and the Nth arc portion includes a sixth end on the side away from the first arc portion;

[0018] The first end is connected to the fifth end, and the second end is connected to the sixth end.

[0019] Optionally, the curvature radii of any two arc portions are the same;

[0020] Or, the curvature radii of two arc portions are different.

[0021] Optionally, the stimulation coil further includes a connecting portion between the arc portion and the diameter portion;

[0022] At least one of the connecting portions is an arc chamfer structure.

[0023] Optionally, the curvature radius of the arc chamfer structure is smaller than the curvature radius of the arc portion.

[0024] Optionally, the stimulation coil includes M turns of sub-stimulation coils; where 5≤M≤15 and M is an integer;

[0025] Along the radial direction of the arc portion, the inner arc radius of the arc portion is R, where 2cm≤R≤7cm;

[0026] The thickness of each turn of the sub-stimulating coil is D, and the width is d, where 0.3 mm ≤ D ≤ 0.7 mm and 1 cm ≤ d ≤ 10 cm;

[0027] The stimulating coil is wound by an oxygen-free pure copper flat strip, a copper tube, a hollow copper tube or a hollow copper strip.

[0028] In a second aspect, an embodiment of the present invention further provides a stimulating device, including a magnetic stimulator and the stimulating coil according to any embodiment of the present invention;

[0029] The first end of the magnetic stimulator is connected to the input end, and the second end of the magnetic stimulator is connected to the output end, and is configured to provide a target current to the stimulating coil.

[0030] Optionally, the magnetic stimulator includes: a power supply, a charging capacitor, a first switch and a second switch;

[0031] The first end of the power supply is connected to the first end of the first switch, the second end of the first switch is connected to the first end of the charging capacitor, and the second end of the charging capacitor is connected to the second end of the power supply;

[0032] The first end of the second switch is connected to the first end of the charging capacitor, the second end of the second switch is connected to the input end of the stimulating coil, and the output end of the stimulating coil is connected to the second end of the charging capacitor.

[0033] In this embodiment, by setting that the stimulating coil includes a diameter part and at least one arc part, and the curvature radius of the diameter part is greater than that of the arc part, while maintaining the rigidity of the stimulating coil, the stability of the fitting between the stimulating coil and the skin of the target area is improved. In addition, the stimulating coil further includes an input end and an output end located at the arc part, and the two are symmetrically arranged about a preset axis of symmetry in the plane intersecting with the diameter part, which enhances the structural stability of the stimulating coil while ensuring the uniform distribution of the preset current in the stimulating coil and the consistency of the flowing direction; an external signal generating device is connected to the input end and the output end to form a current loop including the stimulating coil, so as to form a strip-shaped induced electric field in the spatial section parallel to the plane where the diameter part is located. By fitting the diameter part with the skin surface of the target area, the strip-shaped induced electric field acts on the target area, improving the stimulation accuracy and effect on the target area.

[0034] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0036] Figure 1 It is a schematic structural diagram of a stimulation coil provided by an embodiment of the present invention;

[0037] Figure 2 It is a schematic structural diagram of another stimulation coil provided by an embodiment of the present invention;

[0038] Figure 3 It is a schematic structural diagram of another stimulation coil provided by an embodiment of the present invention;

[0039] Figure 4 It is a schematic application diagram of a stimulation coil provided by an embodiment of the present invention;

[0040] Figure 5 It is another schematic application diagram of a stimulation coil provided by an embodiment of the present invention

[0041] Figure 6 It is a schematic structural diagram of another stimulation coil provided by an embodiment of the present invention;

[0042] Figure 7 It is a schematic structural diagram of another stimulation coil provided by an embodiment of the present invention;

[0043] Figure 8 It is a schematic structural diagram of a stimulation device provided by an embodiment of the present invention;

[0044] Figure 9 It is a schematic structural diagram of another stimulation device provided by an embodiment of the present invention. Detailed implementation manners

[0045] To enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present invention are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0047] As described in the background art, the commonly used magnetic stimulation coils in the existing market have certain limitations in terms of shape, stimulation range, magnetic field focusing and intensity uniformity. These factors together result in unsatisfactory stimulation effects on the target area. In order to improve the effectiveness and safety of magnetic stimulation therapy, it is necessary to further develop more advanced magnetic stimulation coil technologies to meet the needs of clinical applications.

[0048] Based on the above problems, Figure 1 is a schematic structural diagram of a stimulation coil provided by an embodiment of the present invention. As Figure 1 shown, a stimulation coil provided by an embodiment of the present invention includes: a diameter portion 1 and at least one arc portion 2; the radius of curvature of the diameter portion 1 is greater than the radius of curvature of the arc portion 2; the stimulation coil further includes an input end 21 and an output end 22 located at the arc portion 2, and the input end 21 and the output end 22 are symmetrically arranged with respect to a preset symmetry axis S, and the plane where the preset symmetry axis S is located intersects the diameter portion 1.

[0049] Among them, the radius of curvature represents the degree of bending of a curve at a certain point, and its geometric meaning is the radius of the curvature circle. The smaller the radius of curvature, the greater the degree of bending of the curve at a certain point.

[0050] Specifically, the stimulation coil is composed of a diameter portion 1 and at least one arc portion 2. This design enables the stimulation coil to form a continuous and smooth shape in space. The stimulation coil can be connected to the output end and input end of the signal generating device through the input end 21 and the output end 22 of the arc portion 2, respectively. The input end 21 receives the preset current emitted by the signal generating device to input the preset current into the stimulation coil; and the output end 22 returns the current flowing in the stimulation coil to the signal generating device, thereby forming a current loop. The input end 21 and the output end 22 are symmetrically arranged about the preset symmetry axis S. This symmetrical layout is not only beautiful, but also ensures the uniform distribution of the preset current in the stimulation coil and the consistency of the flow direction, thereby improving the stability and controllability of the stimulation coil; at the same time, the plane where the preset symmetry axis S is located intersects with the diameter portion 1, further enhancing the structural stability and spatial positioning ability of the stimulation coil.

[0051] Furthermore, along the radial direction of the arc-shaped portion 2, the diameter portion 1 includes a bottom surface 11. Based on the above-mentioned current loop, after a preset current is passed into the stimulation coil, it can generate a strip-shaped induction electric field along the length extension direction of the diameter portion 1 in a spatial plane parallel to the bottom surface 11. The bottom surface 11 is attached to the skin surface of the user's target area according to the extension direction of its length. The strip-shaped induction electric field generated by the stimulation coil in the spatial plane parallel to the bottom surface 11 can generate a corresponding strip-shaped induction electric field in the tissue where the target area is located through the principle of electromagnetic induction, thereby improving the accuracy and effect of stimulation of the target area.

[0052] It can be understood that the radius of curvature of the diameter portion 1 is greater than the radius of curvature of the arc-shaped portion 2, that is, the diameter portion 1 is flatter than the arc-shaped portion 2. Such a configuration allows the stimulation coil to maintain a certain rigidity while providing a more precise fit to the target area that needs stimulation through the relatively flat bottom surface 11 of the diameter portion 1, which helps to stably position the stimulation coil on the skin surface of the target area, thereby ensuring the accuracy and effectiveness of the stimulation.

[0053] In this embodiment, the stimulation coil includes a diameter portion and at least one arc portion, and the radius of curvature of the diameter portion is greater than the radius of curvature of the arc portion. While maintaining the rigidity of the stimulation coil, the stability of the stimulation coil in contact with the skin of the target area is improved. In addition, the stimulation coil also includes an input end and an output end located in the arc portion, which are symmetrically arranged about a preset symmetry axis in a plane intersecting with the diameter portion, which enhances the structural stability of the stimulation coil while ensuring the uniform distribution of the preset current in the stimulation coil and the consistency of the flow direction; an external signal generating device is connected to the input end and the output end to form a current loop including the stimulation coil, thereby forming a strip-shaped induced electric field in a spatial section parallel to the plane where the diameter portion is located, and the strip-shaped induced electric field acts on the target area through the diameter portion being in contact with the skin surface of the target area, thereby improving the stimulation accuracy and repair effect on the target area.

[0054] Based on the above embodiments, Figure 2 is a schematic structural diagram of another stimulating coil provided by an embodiment of the present invention. As Figure 2 shown, the stimulating coil includes an arc portion; the diameter portion 1 includes a first end 31 and a second end 32 which are oppositely arranged, and the arc portion 2 includes a third end 33 and a fourth end 34 which are oppositely arranged; the first end 31 is connected to the third end 33, and the second end 32 is connected to the fourth end 34.

[0055] Specifically, the stimulating coil is composed of a diameter portion 1 and an arc portion 2. The diameter portion 1 is provided with a first end 31 and a second end 32 which are oppositely arranged, and the arc portion 2 is provided with a third end 33 and a fourth end 34 which are oppositely arranged. Through the connection between the first end 31 and the third end 33, and the connection between the second end 32 and the fourth end 34, an approximately "D"-shaped closed structure with both arc stability and linear conformity is formed. The arc portion 2 provides the reference and stability of the structure, while the diameter portion 1 can be closely attached to the skin surface of the target area. This approximately "D"-shaped structure helps to ensure the continuous flow of the preset current in the stimulating coil, thereby generating a stable and uniform magnetic field at the diameter portion 1. Furthermore, when the bottom of the diameter portion 1 is attached to the skin surface of the target area, a strip-shaped induced electric field generated by the stimulating coil can be accurately transmitted to the nerves in the target area, and the target area can be effectively stimulated along the extension direction of the target area.

[0056] Exemplarily, the target area can be the spinal cord in the spinal column area. When the diameter portion 1 is attached to the skin surface of the user's spinal column in the extension direction of its length, the strip-shaped induced electric field generated by the stimulating coil in the spatial plane parallel to the diameter portion 1 can generate a corresponding strip-shaped induced electric field in the spinal cord tissue through the principle of electromagnetic induction. Since the human spinal column is vertically strip-shaped, the strip-shaped induced electric field generated by the stimulating coil can better adapt to the physiological shape of the spinal cord, ensuring that the electric field is concentrated in the spinal cord injury area, thereby guiding the spinal cord nerve cells to grow, migrate or connect along the extension direction of the spinal cord, improving the stimulation accuracy and repair effect on the spinal cord.

[0057] In this embodiment, by setting that the stimulating coil is composed of a diameter portion and an arc portion, the first end of the diameter portion is connected to the third end of the arc portion, and the second end of the diameter portion is connected to the fourth end of the arc portion, an approximately "D"-shaped closed structure stimulating coil is formed, thereby forming a strip-shaped induced electric field at the diameter portion. By using the attachment of the diameter portion 1 to the skin surface of the target area, the nerves in the target area can be stimulated by the strip-shaped induced electric field, improving the stimulation effect on the target area.

[0058] Optionally, the arc portion includes M turns of arc-shaped sub-coils, and the M turns of arc-shaped sub-coils are arranged in the radial direction of the arc portion; where M≥2 and M is an integer; the third end of the first turn of arc-shaped sub-coil is the input end, and the fourth end of the Mth turn of arc-shaped sub-coil is the output end; or, the fourth end of the first turn of arc-shaped sub-coil is the input end, and the third end of the Mth turn of arc-shaped sub-coil is the output end; or, the third end of the first turn of arc-shaped sub-coil is the output end, and the fourth end of the Mth turn of arc-shaped sub-coil is the input end; or, the fourth end of the first turn of arc-shaped sub-coil is the output end, and the third end of the Mth turn of arc-shaped sub-coil is the input end.

[0059] Specifically, the stimulating coil can be formed by winding the same wire M turns (M≥2 and M is an integer) with a preset inner radius of the arc portion and from the inside to the outside in the radial direction; at the same time, both the starting end and the ending end of the wire need to be located on the arc portion 2 and extend in a direction away from the plane where the radius of the arc portion is located to form the input end and the output end of the stimulating coil, ensuring that when the stimulating coil is externally connected to a signal generating device, a preset current can flow smoothly in the stimulating coil, reducing resistance and voltage drop, improving the utilization rate of electric energy, and also making the distribution of the magnetic field in the arc portion more uniform, which helps to form a more stable strip-shaped induced electric field and achieve more accurate stimulation of the target area. Since the stimulating coil is composed of M turns of coils arranged in the radial direction by a single wire, the starting end and the ending end of the wire are located on both sides of the arc portion in the radial direction. For example, the starting end is on the inner surface of the arc portion and the ending end is on the outer surface of the arc portion.

[0060] Further, the arc portion includes M turns of arc-shaped sub-coils arranged in the radial direction of the arc portion, that is, the radii of multiple arc-shaped sub-coils are coplanar. To ensure the above technical effects, in the radial direction of the arc portion, when the input end and the output end are respectively located on the arc portion and symmetrically arranged with respect to a preset axis of symmetry, and are located on both sides of the arc portion, the input end of the stimulation coil can be the third end of the first turn of the arc-shaped sub-coil, and the output end can be the fourth end of the Mth turn of the arc-shaped sub-coil, so that the preset current emitted by the signal generating device flows into the stimulation coil from the third end of the first turn of the arc-shaped sub-coil, and after being transmitted through the wire of the stimulation coil, returns to the signal generating device from the fourth end of the Mth turn of the arc-shaped sub-coil to form a complete current loop; or, the input end of the stimulation coil can be the fourth end of the first turn of the arc-shaped sub-coil, and the output end can be the third end of the Mth turn of the arc-shaped sub-coil, so that the preset current emitted by the signal generating device flows into the stimulation coil from the fourth end of the first turn of the arc-shaped sub-coil, and after being transmitted through the wire of the stimulation coil, returns to the signal generating device from the third end of the Mth turn of the arc-shaped sub-coil to form a complete current loop; or, the output end of the stimulation coil can be the third end of the first turn of the arc-shaped sub-coil, and the input end can be the fourth end of the Mth turn of the arc-shaped sub-coil, so that the preset current emitted by the signal generating device flows into the stimulation coil from the fourth end of the Mth turn of the arc-shaped sub-coil, and after being transmitted through the wire of the stimulation coil, returns to the signal generating device from the third end of the first turn of the arc-shaped sub-coil to form a complete current loop; or, the output end of the stimulation coil can be the fourth end of the first turn of the arc-shaped sub-coil, and the input end can be the third end of the Mth turn of the arc-shaped sub-coil, so that the preset current emitted by the signal generating device flows into the stimulation coil from the third end of the Mth turn of the arc-shaped sub-coil, and after being transmitted through the wire of the stimulation coil, returns to the signal generating device from the fourth end of the first turn of the arc-shaped sub-coil to form a complete current loop, thereby ensuring the stability of the stimulation coil and the accuracy of stimulation.

[0061] Based on the above embodiments, Figure 3 is a schematic structural diagram of another stimulation coil provided by an embodiment of the present invention; Figure 4 An application schematic diagram of a stimulation coil provided by an embodiment of the present invention; Figure 5 is another application schematic diagram of a stimulation coil provided by an embodiment of the present invention. As Figure 3 shown, the stimulation coil includes N arc portions 2, and the N arc portions 2 are arranged in sequence along the circumferential direction X of the diameter portion 1; wherein, N≥2 and N is an integer; the diameter portion 1 includes a first end 31 and a second end 32 arranged oppositely, the first arc portion 2 includes a fifth end 35 on a side away from the Nth arc portion 2, and the Nth arc portion 2 includes a sixth end 36 on a side away from the first arc portion 2; the first end is connected to the fifth end, and the second end is connected to the sixth end.

[0062] Specifically, the stimulation coil may include N arc-shaped portions 2 (N is an integer greater than or equal to 2). Along the radial direction of the arc-shaped portion 2, the N arc-shaped portions 2 are located on one side of the diameter portion 1 and are arranged in sequence along the circumferential direction X of the diameter portion 1. The fifth end 35 of the first arc-shaped portion 2 away from the Nth arc-shaped portion 2 is connected to the first end 31 of the diameter portion 1, and the sixth end 36 of the Nth arc-shaped portion 2 away from the first arc-shaped portion 2 is connected to the second end 32 of the diameter portion 1. That is, the two ends with the farthest distance among the multiple arc-shaped portions 2 are respectively connected to the first end and the second end of the diameter portion 1, and the remaining ends of two adjacent arc-shaped portions 2 are connected pairwise to form a wavy closed coil structure, extending the effective length of the strip-shaped induction electric field generated by the diameter portion 1. While ensuring that the magnetic field can evenly cover the target area, the magnetic fields of the multiple arc-shaped portions 2 are superimposed, and a stronger induction electric field can be generated in the target area, improving the stimulation efficiency.

[0063] Exemplarily, as Figure 3 shown, the stimulation coil may include 3 arc-shaped portions 2. Along the circumferential direction X of the diameter portion 1, they are respectively the first arc-shaped portion 2, the second arc-shaped portion 2, and the third arc-shaped portion 2. The fifth end 35 of the first arc-shaped portion 2 is connected to the first end 31 of the diameter portion 1, the sixth end 36 of the third arc-shaped portion 2 is connected to the second end 31 of the diameter portion 1, the other end of the first arc-shaped portion 2 is connected to the adjacent end of the second arc-shaped portion 2, and the other end of the third arc-shaped portion 2 is connected to the adjacent end of the second arc-shaped portion 2 to form a wavy closed coil structure. It should be noted that the number N of the arc-shaped portions 2 and the number of turns M of the arc-shaped portion may be the same or different, and this embodiment does not make specific limitations on this.

[0064] It should be noted that, as Figure 4 shown, the current of the stimulation coil flows in from the left input terminal Iin and flows out from the left output terminal Iout after passing through the entire coil. At this time, in the entire coil, the magnetic field of the second part 7 will cancel out a part, and the magnetic field of the first part 6 will be greater than that of the second part 7. It can be applied when stimulating the long spine. The first part 6 is used for the target area, and the second part 7 is used for the non-target area or the spine connection part. As Figure 5 shown, the current of the stimulation coil flows in from the left input terminal Iin and flows out from the right output terminal Iout. At this time, in the entire coil, the magnetic field of the second part 7 will be strengthened, and the magnetic field of the first part 6 is less than that of the second part 7. It can be applied when stimulating the long spine. The first part 6 is used for the auxiliary area, and the second part 7 is used for the target area or the spine connection part. At the same time, the right side of the stimulation coil can be disconnected or connected through electrical components, and the above two current modes can be switched according to actual needs.

[0065] In this embodiment, the stimulation coil is provided with N arc-shaped portions (N is an integer greater than or equal to 2) arranged in sequence along the circumferential direction of the diameter portion, and the two farthest ends among the N arc-shaped portions 2 are respectively connected to the first end and the second end of the diameter portion 1, forming a wavy closed coil structure, which enhances the magnetic field uniformity and coverage of the stimulation coil. Thus, while more comprehensively stimulating the target area, the magnetic fields of multiple arc-shaped portions are superimposed, which can generate a stronger induced electric field in the target area and improve the stimulation efficiency.

[0066] Optionally, the curvature radii of any two arc-shaped portions are the same; or, there are two arc-shaped portions with different curvature radii.

[0067] Specifically, when the stimulation coil is provided with multiple arc-shaped portions 2, the curvature radii of any two arc-shaped portions can be set to be the same. With the preset current unchanged, the contribution of each arc-shaped portion 2 to the magnetic field is similar, thus reducing magnetic field distortion and helping to generate a more uniform magnetic field distribution around the stimulation coil, thereby ensuring that the stimulation intensity of the stimulation coil on the target area remains consistent within the target area. Or, there are two arc-shaped portions 2 with different curvature radii. By adjusting the curvature radii of different arc-shaped portions 2, the magnetic field distribution can be optimized to meet specific stimulation requirements, improving the stimulation flexibility of the stimulation coil so that it can adapt to different stimulation scenarios and targets. For example, when the user's damaged areas are different, it may be necessary to generate a stronger magnetic field in some parts of the stimulation coil and a weaker magnetic field in other parts. At this time, by changing the curvature radius of a certain arc-shaped portion 2, this customization of the magnetic field distribution can be achieved.

[0068] Exemplarily, continuing to refer to Figure 3 , the stimulation coil may include 3 arc-shaped portions 2, along the circumferential direction X of the diameter portion 1, namely the first arc-shaped portion 2, the second arc-shaped portion 2, and the third arc-shaped portion 2. The curvature radius b of the second arc-shaped portion 2 may be the same as the curvature radius c of the third arc-shaped portion 2 to generate the same magnetic field on the second arc-shaped portion 2 and the third arc-shaped portion 2 and ensure that the stimulation intensity is consistent in each part of the target area; the curvature radius a of the first arc-shaped portion 2 may be different from the curvature radius c of the second arc-shaped portion 2 to generate different magnetic fields on the first arc-shaped portion 2 and the second arc-shaped portion 2, and use the first arc-shaped portion 2 and the second arc-shaped portion 2 to meet the different stimulation intensity requirements of the user's damaged parts.

[0069] Optionally, the stimulation coil further includes a connecting portion 37 between the arc-shaped portion 2 and the diameter portion 1; at least one connecting portion 37 is an arc chamfer structure.

[0070] Specifically, the connecting portion 37 serves as a transition region between the arc portion 2 and the diameter portion 1, and its shape can be set as an arc chamfer structure, that is, at least one connecting portion 37 adopts an arc chamfer design, so that the arc portion 2 and the diameter portion 1 are connected by an arc transition, which can disperse the stress at the connecting portion 37, reduce the material fatigue or damage that may be caused by stress concentration at the connecting portion 37, improve the overall mechanical stability of the stimulating coil, and reduce the risk of fracture or deformation of the connecting portion 37 during long-term use. In addition, the arc chamfer structure can also reduce the distortion and mutation of magnetic field lines, contribute to the smooth transition of the magnetic field around the stimulating coil, thereby generating a more uniform and stable magnetic field distribution, reducing magnetic field distortion, and thus improving the stimulation effect on the target area.

[0071] Optionally, the radius of curvature of the arc chamfer structure is smaller than the radius of curvature of the arc portion 2.

[0072] Specifically, the radius of curvature of the arc chamfer structure is smaller than the radius of curvature of the arc portion 2, that is, the bending degree of the connecting portion 37 is greater than that of the arc portion 2. The connecting portion 37 with a small radius of curvature enables the stimulating coil to more flexibly adapt to complex shapes and space limitations, which is particularly important for the application of stimulating coils that need to fit the human body curve to repair the target area, and can improve the fitting degree and comfort between the stimulating coil and the target area. At the same time, since the diameter portion 1 needs to be attached to the skin surface of the human target area when the stimulating coil is applied, the magnetic field at the connecting portion 37 also participates in the work of stimulating the target area. The magnetic field at the connecting portion 37 will be more concentrated due to the reduction of the radius of curvature. The smaller radius of curvature makes the connecting portion 37 generate a stronger magnetic field gradient, which helps to achieve more accurate stimulation positioning, act more accurately on the target area, and improve the accuracy and effectiveness of stimulation.

[0073] Optionally, Figure 6 is a schematic structural diagram of another stimulating coil provided by an embodiment of the present invention. As Figure 6 shown, the stimulating coil includes M sub-stimulating coils; where 5 ≤ M ≤ 15 and M is an integer; along the radial direction of the arc portion 2, the inner arc radius of the arc portion 2 is R, where 2 cm ≤ R ≤ 7 cm; the thickness of each sub-stimulating coil is D and the width is d, where 0.3 mm ≤ D ≤ 0.7 mm and 1 cm ≤ d ≤ 10 cm; the stimulating coil is wound by an oxygen-free pure copper flat strip, a copper tube, a hollow copper tube or a hollow copper strip.

[0074] Specifically, the stimulation coil is composed of 5 to 15 sub-stimulation coils arranged along the radial direction of the arc portion 2. The material can be oxygen-free pure copper flat belt, copper tube, hollow copper tube or hollow copper belt with high electrical conductivity. By adjusting the number of turns, the area and intensity of the induced electric field region of the stimulation coil can be precisely controlled. More turns usually mean a stronger magnetic field and a larger stimulation area, but it will also increase the resistance and heat generation. Therefore, by selecting an appropriate number of turns between 5 and 15, while ensuring the stimulation effect, overheating or energy loss can be avoided. The range of the inner arc radius R is set to 2 cm to 7 cm, which helps to miniaturize the stimulation coil and improve its portability. At the same time, this radius range can also prevent the stimulation coil from being too loose, resulting in a reduced stimulation effect. The thickness D of each sub-stimulation coil is 0.3 mm to 0.7 mm, and the width d is 1 cm to 10 cm, which helps to control the overall size and shape of the stimulation coil, making it easier to adapt to different usage scenarios and patient needs. For example, a thinner coil may be more suitable for areas with more sensitive skin, while a wider coil may provide a wider stimulation coverage range. By changing the size of each self-stimulation coil, the adaptability of the stimulation coil can be improved. In addition, by precisely controlling the thickness and width of each turn of the coil, the current distribution can be optimized, resistance loss can be reduced, and the risk of overheating can be lowered. In addition, a reasonable coil size and shape design can also reduce the impact of electromagnetic radiation on the surrounding environment and improve the safety of use.

[0075] Exemplarily, Figure 7 is a schematic structural diagram of another stimulation coil provided by an embodiment of the present invention. Refer to Figure 7 , the stimulation coil can be wound with oxygen-free pure copper flat belt, copper tube, hollow copper tube or hollow copper belt with high electrical conductivity, including 10 sub-stimulation coils. Along the radial direction of the arc portion, the inner arc radius of the arc portion is 4.5 cm, the thickness of each sub-stimulation coil is 0.5 mm, and the width is 1.6 cm. Based on the "D-shaped" stimulation coil with the above data, a strip-shaped electric field is formed at the section where the stimulation coil is parallel to the bottom, which can be used for spinal nerve stimulation. When the stimulation coil is in use, the bottom needs to fit the skin surface of the user's spine. Since there is a part of human tissue between the stimulation coil and the spine, the 5 mm - 10 mm strip-shaped induced electric field can accurately act on the spinal cord to ensure the stimulation effect of the target area.

[0076] Based on the same inventive concept, Figure 8 is a schematic structural diagram of a stimulation device provided by an embodiment of the present invention. As Figure 8 shown, a stimulation device provided by an embodiment of the present invention includes a magnetic stimulator 4 and a stimulation coil 5; the first end of the magnetic stimulator 4 is connected to the input end, and the second end of the magnetic stimulator 4 is connected to the output end, which is used to provide a target current to the stimulation coil.

[0077] Specifically, the magnetic stimulator 4 is a signal generating device of the stimulating apparatus, responsible for generating and controlling the current used for magnetic stimulation, capable of precisely controlling the current intensity and frequency supplied to the stimulating coil, so as to adjust the parameters of magnetic stimulation according to the specific conditions of the user and the treatment requirements, effectively stimulate the nerve cells and tissues in the target area, promote the repair and functional recovery of the target area, and achieve the best treatment effect. The first end of the magnetic stimulator 4 is connected to the input end of the stimulating coil 5 for sending the target current to the stimulating coil 5, and the second end of the magnetic stimulator 4 is connected to the output end for receiving the current flowing through the stimulating coil 5 to form a current loop, generating a specific magnetic field in the stimulating coil 5, and then performing magnetic stimulation on the target area.

[0078] Optionally, Figure 9 is a schematic structural diagram of another stimulating apparatus provided by an embodiment of the present invention. As Figure 9 shown, the magnetic stimulator includes: a power supply DC, a charging capacitor C, a first switch s1, and a second switch s2; the first end of the power supply DC is connected to the first end of the first switch s1, the second end of the first switch s1 is connected to the first end of the charging capacitor C, and the second end of the charging capacitor C is connected to the second end of the power supply DC; the first end of the second switch s2 is connected to the first end of the charging capacitor C, the second end of the second switch s2 is connected to the input end of the stimulating coil 5, and the output end of the stimulating coil 5 is connected to the second end of the charging capacitor C.

[0079] Specifically, the power supply DC, the first switch s1, and the charging capacitor C constitute a charging control loop. When the magnetic stimulator works, first close the first switch s1, and the power supply DC charges a group of high-voltage and large-capacity charging capacitors C, and the charging process of the charging capacitor C is controlled by the switch s1. The charging capacitor C, the second switch s2, and the stimulating coil 5 constitute an electric energy release loop. After the charging capacitor C is fully charged, close the second switch s2, and the charging capacitor C discharges to the stimulating coil 5. The discharging process of the charging capacitor C is controlled by the switch s2, and a pulsed current of thousands of amperes flows through in less than 1 ms, causing a strong pulsed magnetic field of several teslas to be generated on the surface of the stimulating coil 5, where R is the internal resistance of the stimulating coil 5 and L is the inductance of the stimulating coil.

[0080] A stimulating apparatus provided by an embodiment of the present invention includes the stimulating coil provided by any embodiment of the present invention, and has the corresponding methods and beneficial effects of applying the stimulating coil, which will not be elaborated here.

[0081] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A stimulation coil, characterized in that: include: a diameter portion and at least one arcuate portion; The radius of curvature of the diameter portion is greater than the radius of curvature of the arc portion; The stimulation coil also includes an input end and an output end located at the arc portion, wherein the input end and the output end are symmetrically arranged about a preset symmetry axis, and a plane where the preset symmetry axis is located intersects with the diameter portion.

2. The stimulation coil according to claim 1, characterized in that The stimulation coil comprises an arc-shaped portion; The diameter portion includes a first end and a second end that are oppositely disposed, and the arc portion includes a third end and a fourth end that are oppositely disposed; The first end is connected to the third end, and the second end is connected to the fourth end.

3. The stimulation coil according to claim 2, characterized in that The arc portion includes M turns of arc sub-coils, and the M turns of the arc sub-coils are arranged along the radial direction of the arc portion; wherein M≥2, and M is an integer; The third end of the first turn of the arc sub-coil is the input end, and the fourth end of the Mth turn of the arc sub-coil is the output end; Alternatively, the fourth end of the first turn of the arc-shaped sub-coil is the input end, and the third end of the Mth turn of the arc-shaped sub-coil is the output end; Alternatively, the third end of the first turn of the arc-shaped sub-coil is the output end, and the fourth end of the Mth turn of the arc-shaped sub-coil is the input end; Alternatively, the fourth end of the first turn of the arc-shaped sub-coil is the output end, and the third end of the Mth turn of the arc-shaped sub-coil is the input end.

4. The stimulation coil according to claim 1, characterized in that The stimulation coil comprises N arc-shaped portions, and the N arc-shaped portions are arranged in sequence along the circumferential direction of the diameter portion; wherein N ≥ 2, and N is an integer; The diameter portion includes a first end and a second end that are oppositely disposed, the first arc-shaped portion includes a fifth end that is away from one side of the Nth arc-shaped portion, and the Nth arc-shaped portion includes a sixth end that is away from one side of the first arc-shaped portion; The first end is connected to the fifth end, and the second end is connected to the sixth end.

5. The stimulation coil according to claim 4, characterized in that The curvature radii of any two of the arc-shaped portions are the same; Alternatively, there are two arc-shaped portions with different curvature radii.

6. The stimulation coil according to claim 1, characterized in that The stimulation coil further includes a connecting portion between the arc portion and the diameter portion; At least one of the connecting parts is an arc chamfered structure.

7. The stimulation coil according to claim 6, characterized in that The curvature radius of the circular chamfer structure is smaller than the curvature radius of the arc portion.

8. The stimulation coil according to claim 1, characterized in that The stimulation coil comprises M-turn stimulation coils; wherein 5≤M≤15, and M is an integer; Along the radial direction of the arc-shaped portion, the inner arc radius of the arc-shaped portion is R, wherein 2cm≤R≤7cm; The thickness of each turn of the sub-stimulation coil is D, and the width is d, wherein 0.3 mm ≤ D ≤ 0.7 mm, 1 cm ≤ d ≤ 10 cm; The stimulation coil is wound from an oxygen-free pure copper flat strip, a copper tube, a hollow copper tube or a hollow copper strip.

9. A stimulation device, characterized in that: comprising a magnetic stimulator and a stimulation coil according to any one of claims 1 to 8; The first end of the magnetic stimulator is connected to the input end, and the second end of the magnetic stimulator is connected to the output end, for providing a target current to the stimulation coil.

10. The stimulation device according to claim 9, characterized in that The magnetic stimulator comprises: a power supply, a charging capacitor, a first switch and a second switch; The first end of the power supply is connected to the first end of the first switch, the second end of the first switch is connected to the first end of the charging capacitor, and the second end of the charging capacitor is connected to the second end of the power supply; The first end of the second switch is connected to the first end of the charging capacitor, the second end of the second switch is connected to the input end of the stimulation coil, and the output end of the stimulation coil is connected to the second end of the charging capacitor.

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