Pulse generator and nerve stimulator

Abstract

The utility model relates to a pulse generator and a nerve stimulator, and the pulse generator comprises a magnetic isolation assembly which is made of a magnetic isolation material and comprises a first magnetic isolation sheet, a second magnetic isolation sheet and a filling magnetic isolation sheet, and the first magnetic isolation sheet and the second magnetic isolation sheet are oppositely arranged; the PCBA comprises a PCB and an electronic component, and the electronic component is fixedly arranged on the PCB and located between the first magnetic isolation sheet and the second magnetic isolation sheet; the receiving coil is sleeved outside the first magnetic isolation sheet, the second magnetic isolation sheet and the PCBA; the side, away from the second magnetic isolation sheet, of the first magnetic isolation sheet and the receiving coil jointly define a first space, and the side, away from the first magnetic isolation sheet, of the second magnetic isolation sheet and the receiving coil jointly define a second space. And the filling magnetic isolation sheet is arranged in the first space or the second space. After the filling magnetism isolating sheets are arranged, the number of the magnetism isolating sheets in the magnetism isolating assembly is increased, the space between the magnetism isolating assembly and the receiving coil is reduced, and the energy conversion efficiency of the pulse generator can be improved through the factors in the two aspects.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a pulse generator and a nerve stimulator. Background Art

[0002] Some neurostimulators need to remain in the body for a long time to exert their therapeutic effects. In order to ensure that the neurostimulator can apply electrical stimulation to the body for many years, these neurostimulators need to be wirelessly charged through the skin and other tissues of the body. Specifically, a pulse generator is provided in the neurostimulator, and the pulse generator includes a PCBA and a receiving coil. A transmitting coil is provided in the transmitter matched with the pulse generator. The transmitting coil generates magnetic field energy when energized, and the receiving coil receives the magnetic field energy and converts it into electrical energy. The PCBA (Printed Circuit Board Assembly) converts the electrical energy into the electrical stimulation signal required for the neurostimulator to apply electrical stimulation.

[0003] For the convenience of the following description, the following definition is made: the efficiency of the pulse generator in converting the magnetic field energy generated by the transmitting coil into electrical energy is called the energy conversion efficiency of the pulse generator.

[0004] Small neurostimulators have the following advantages: easy implantation, minimal trauma during the implantation process, high safety, and the ability to significantly reduce patient discomfort. These advantages have made the miniaturization of neurostimulators a hot topic in the development of neurostimulators. As neurostimulators become smaller and smaller, the receiving coils inside them are also getting smaller and smaller, which results in a decrease in the ability of the receiving coils to receive magnetic field energy, and the energy conversion efficiency of the pulse generator is therefore reduced. When the energy conversion efficiency of the pulse generator drops to a certain level, the pulse generator cannot provide enough electrical energy, causing the neurostimulator to fail to work properly. Therefore, the energy conversion efficiency of the pulse generator has become an important factor restricting the miniaturization of neurostimulators. In order to make the neurostimulator smaller, it is necessary to increase the energy conversion efficiency of the pulse generator as much as possible.

[0005] In a pulse generator, a magnetic barrier is typically placed between the PCBA and the receiving coil, separating the electronic components on the PCBA from the receiving coil. On the one hand, the magnetic barrier concentrates and guides the magnetic field, acting as a magnetizing agent. This allows the receiving coil to more effectively capture and utilize the magnetic field energy transmitted from the transmitting coil, thereby improving the pulse generator's energy conversion efficiency. On the other hand, electromagnetic interference from the PCBA on the receiving coil can cause fluctuations and noise in the electrical stimulation signal output by the neurostimulator, making the stimulation signal unstable. An unstable stimulation signal may not accurately regulate the patient's neural activity, resulting in reduced therapeutic effectiveness. The magnetic barrier blocks the electromagnetic interference from the PCBA on the receiving coil, acting as a magnetic barrier, and facilitates the stable output of the stimulation signal from the neurostimulator, thereby ensuring therapeutic effectiveness.

[0006] The inventors of the present application have discovered through experiments that, when other conditions remain unchanged (such as the weight of the magnetic isolation layer remains unchanged, and the relative position between the receiving coil and the transmitting coil remains unchanged), the closer the magnetic isolation layer is to the receiving coil and the smaller the space between the magnetic isolation layer and the receiving coil, the higher the energy conversion efficiency of the pulse generator. However, in the prior art, the magnetic isolation layer is usually assembled from multiple die-cast magnetic isolation sheets, and the outer side of such a magnetic isolation layer is flat. The receiving coil is wound around the outer side of the magnetic isolation layer. When the receiving coil has a curved surface feature (for example, when the receiving coil is wound along a cylindrical spiral line to form a cylindrical spiral structure), there is a large space between the magnetic isolation layer and the receiving coil, resulting in a low energy conversion efficiency of the pulse generator, which is not conducive to making the neurostimulator smaller. Utility Model Content

[0007] Therefore, it is necessary to provide a pulse generator and a neurostimulator to address the above-mentioned problems. In this pulse generator, the space between all magnetic isolation structures and the receiving coil is small, thereby improving the energy conversion efficiency of the pulse generator. Using this pulse generator can facilitate the reduction of the size of the neurostimulator.

[0008] In order to solve the above problems, this application provides the following technical solutions:

[0009] A pulse generator, comprising:

[0010] The magnetic isolation assembly is made of magnetic isolation material and includes a first magnetic isolation sheet, a second magnetic isolation sheet and a filling magnetic isolation sheet, wherein the first magnetic isolation sheet and the second magnetic isolation sheet are arranged opposite to each other;

[0011] A PCBA, comprising a PCB and electronic components, wherein the electronic components are fixed to the PCB and located between the first magnetic isolation sheet and the second magnetic isolation sheet; and

[0012] a receiving coil, which is sleeved on the first magnetic isolation sheet, the second magnetic isolation sheet, and the PCBA; a side of the first magnetic isolation sheet away from the second magnetic isolation sheet and the receiving coil together enclose a first space, and a side of the second magnetic isolation sheet away from the first magnetic isolation sheet and the receiving coil together enclose a second space;

[0013] The magnetic isolation filling sheet is arranged in the first space or the second space.

[0014] The pulse generator has at least the following beneficial effects:

[0015] Compared with not setting up the filling magnetic isolation sheets, after setting up the filling magnetic isolation sheets, on the one hand, the number of magnetic isolation sheets in the magnetic isolation assembly increases, and on the other hand, the space between the magnetic isolation assembly and the receiving coil decreases. Both of these factors enable the receiving coil to more effectively capture and utilize the magnetic field energy transmitted from the transmitting coil, and both can improve the energy conversion efficiency of the pulse generator. Therefore, the energy conversion efficiency of the pulse generator is relatively high.

[0016] In one embodiment, the magnetic isolation assembly includes a plurality of filling magnetic isolation sheets, at least one of the filling magnetic isolation sheets is disposed in the first space, and at least one of the filling magnetic isolation sheets is disposed in the second space.

[0017] Such an arrangement is beneficial for reducing the space between the magnetic isolation component and the receiving coil, and is beneficial for improving the energy conversion efficiency of the pulse generator.

[0018] In one embodiment, only one magnetic isolation filler sheet is provided in the first space, and the magnetic isolation filler sheet in the first space is disposed in contact with the first magnetic isolation sheet.

[0019] Such an arrangement can not only reduce the space between the magnetic isolation assembly and the receiving coil, but also utilize the first magnetic isolation sheet to support the filling magnetic isolation sheet located in the first space.

[0020] In one embodiment, a plurality of magnetic isolation filling sheets are provided in the first space, and the magnetic isolation filling sheets in the first space are stacked in sequence along the thickness direction of the PCB.

[0021] Such an arrangement is beneficial for reducing the space between the magnetic isolation component and the receiving coil, and is beneficial for improving the energy conversion efficiency of the pulse generator.

[0022] In one embodiment, the first magnetic isolation sheet and each of the filling magnetic isolation sheets located in the first space are arranged in pairs.

[0023] Such an arrangement is conducive to fully utilizing the first space and arranging more filling magnetic isolation sheets in the first space, thereby improving the energy conversion efficiency of the pulse generator.

[0024] In one embodiment, only one magnetic isolation filler sheet is provided in the second space, and the magnetic isolation filler sheet in the second space is fitted to the second magnetic isolation sheet.

[0025] Such an arrangement can not only reduce the space between the magnetic isolation assembly and the receiving coil, but also utilize the second magnetic isolation sheet to support the filling magnetic isolation sheet located in the second space.

[0026] In one embodiment, a plurality of magnetic isolation filling sheets are provided in the second space, and the magnetic isolation filling sheets in the second space are stacked in sequence along the thickness direction of the PCB.

[0027] Such an arrangement is beneficial for reducing the space between the magnetic isolation component and the receiving coil, and is beneficial for improving the energy conversion efficiency of the pulse generator.

[0028] In one embodiment, the second magnetic isolation sheet and each of the filling magnetic isolation sheets located in the second space are arranged in pairs.

[0029] Such an arrangement is conducive to fully utilizing the second space and arranging more filling magnetic isolation sheets in the second space, thereby improving the energy conversion efficiency of the pulse generator.

[0030] In one embodiment, the width direction of the PCB is a first direction, and both ends of the first magnetic isolation sheet along the first direction, both ends of the second magnetic isolation sheet along the first direction, and both ends of the filling magnetic isolation sheet along the first direction are in contact with the receiving coil.

[0031] Such an arrangement is beneficial to improving the utilization rate of the magnetic isolation component for the space inside the receiving coil, and is beneficial to improving the energy conversion efficiency of the pulse generator.

[0032] The present application also provides a neurostimulator, which includes the above-mentioned pulse generator.

[0033] The pulse generator has at least the following beneficial effects:

[0034] Because the energy conversion efficiency of the pulse generator is high, even if the pulse generator is made smaller, the pulse generator still has sufficient energy conversion efficiency. By using the pulse generator, the pulse generator can be made smaller, and thus the neurostimulator can be made smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of a neurostimulator according to one embodiment of the present application;

[0036] Figure 2 for Figure 1A cross-sectional view of the neurostimulator in the AA direction is shown;

[0037] Figure 3 is a cross-sectional view of a neurostimulator according to another embodiment;

[0038] Figure 4 A cross-sectional view of a neurostimulator according to yet another embodiment.

[0039] Reference numerals:

[0040] 1. Magnetic isolation assembly; 11. First magnetic isolation sheet; 12. Second magnetic isolation sheet; 13. Filling magnetic isolation sheet; 2. PCBA; 21. PCB; 22. Electronic components; 3. Receiving coil; 4. First space; 5. Second space; 6. Housing. DETAILED DESCRIPTION

[0041] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0044] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0047] See Figure 2 The present application first provides a pulse generator, which includes a magnetic isolation component 1, a PCBA2 and a receiving coil 3. The magnetic isolation component 1 is made of magnetic isolation material, and includes a first magnetic isolation plate 11 and a second magnetic isolation plate 12, and the first magnetic isolation plate 11 and the second magnetic isolation plate 12 are arranged opposite to each other. PCBA2 includes a PCB21 (Printed Circuit Board) and electronic components 22, and the electronic components 22 are fixed to the PCB21 and are located between the first magnetic isolation plate 11 and the second magnetic isolation plate 12. The receiving coil 3 is sleeved outside the first magnetic isolation plate 11, the second magnetic isolation plate 12 and the PCBA2. The side of the first magnetic isolation plate 11 away from the second magnetic isolation plate 12 together with the receiving coil 3 encloses a first space 4, and the side of the second magnetic isolation plate 12 away from the first magnetic isolation plate 11 together with the receiving coil 3 encloses a second space 5.

[0048] See Figure 2The magnetic isolation assembly 1 further includes a filling magnetic isolation sheet 13, which is disposed in the first space 4 or the second space 5. Compared to a configuration without the filling magnetic isolation sheet 13, the provision of the filling magnetic isolation sheet 13 increases the number of magnetic isolation sheets in the magnetic isolation assembly 1 and reduces the space between the magnetic isolation assembly 1 and the receiving coil 3. Both of these factors enable the receiving coil 3 to more effectively capture and utilize the magnetic field energy transmitted from the transmitting coil, thereby improving the energy conversion efficiency of the pulse generator. Therefore, the pulse generator has a higher energy conversion efficiency.

[0049] It is understood that the first magnetic isolation sheet 11, the second magnetic isolation sheet 12 and the filling magnetic isolation sheet 13 can be made of the same magnetic isolation material or different magnetic isolation materials. For example, the magnetic isolation material is ferrite / NdFeB / Samarium Cobalt.

[0050] See Figure 2 , there are usually multiple electronic components 22. In some embodiments, only one electronic component 22 can also be provided.

[0051] In some embodiments, the magnetic isolation assembly 1 includes only one magnetic isolation filler sheet 13 .

[0052] See Figure 2 The magnetic isolation assembly 1 includes a plurality of filling magnetic isolation sheets 13, at least one of which is disposed in the first space 4, and at least one of which is disposed in the second space 5. This helps reduce the space between the magnetic isolation assembly 1 and the receiving coil 3, thereby improving the energy conversion efficiency of the pulse generator.

[0053] See Figure 3 In some embodiments, only one filler magnetic shielding sheet 13 is provided in the first space 4, and the filler magnetic shielding sheet 13 in the first space 4 is positioned flush with the first magnetic shielding sheet 11. This reduces the space between the magnetic shielding assembly 1 and the receiving coil 3 while allowing the first magnetic shielding sheet 11 to support the filler magnetic shielding sheet 13 in the first space 4.

[0054] See Figure 4 In other embodiments, a plurality of magnetic isolation sheets 13 are provided in the first space 4. Each magnetic isolation sheet 13 in the first space 4 is provided along the thickness direction of the PCB 21 (ie Figure 4 The first space 4 is stacked sequentially (in the left and right directions). This helps reduce the space between the magnetic shielding assembly 1 and the receiving coil 3, thereby improving the energy conversion efficiency of the pulse generator. For example, two, three, or four magnetic shielding sheets 13 are placed in the first space 4.

[0055] See Figure 4The first magnetic isolation sheet 11 and each magnetic isolation sheet 13 in the first space 4 are arranged in pairs. This is conducive to fully utilizing the first space 4 and facilitating the arrangement of more magnetic isolation sheets 13 in the first space 4, thereby improving the energy conversion efficiency of the pulse generator.

[0056] See Figure 3 In some embodiments, only one filler magnetic shielding sheet 13 is provided in the second space 5, and the filler magnetic shielding sheet 13 in the second space 5 is positioned flush with the second magnetic shielding sheet 12. This reduces the space between the magnetic shielding assembly 1 and the receiving coil 3 while allowing the second magnetic shielding sheet 12 to support the filler magnetic shielding sheet 13 in the second space 5.

[0057] See Figure 4 In other embodiments, multiple magnetic shielding sheets 13 are provided within the second space 5. Each shielding sheet 13 within the second space 5 is stacked sequentially along the thickness of the PCB 21. This helps reduce the space between the magnetic shielding assembly 1 and the receiving coil 3, thereby improving the energy conversion efficiency of the pulse generator. For example, two, three, or four shielding sheets 13 are provided within the second space 5.

[0058] See Figure 4 The second magnetic isolation sheets 12 and the filling magnetic isolation sheets 13 located in the second space 5 are arranged in pairs. This is conducive to fully utilizing the second space 5 and facilitating the arrangement of more filling magnetic isolation sheets 13 in the second space 5, thereby improving the energy conversion efficiency of the pulse generator.

[0059] It can be understood that in order to fully reduce the space between the magnetic isolation component 1 and the receiving coil 3, as many filling magnetic isolation sheets 13 as possible can be stacked along the thickness direction of the PCB 21 in the first space 4 and the second space 5 until the space between the magnetic isolation component 1 and the receiving coil 3 can no longer be filled with more filling magnetic isolation sheets 13.

[0060] The minimum thickness of a ferrite-based magnetic shield is typically 0.5 mm. In some embodiments, the filler magnetic shield 13 is made of a ferrite material, and the maximum spacing between the magnetic shield assembly 1 and the receiving coil 3 along the thickness of the PCB 21 is less than 0.5 mm. In other words, no additional magnetic shield can be inserted between the magnetic shield assembly 1 and the receiving coil 3 along the thickness of the PCB 21.

[0061] The minimum thickness of the magnetic shielding sheet made of nickel-iron alloy is usually 0.1 mm. In some embodiments, the magnetic shielding sheet 13 is made of nickel-iron alloy, and the maximum distance between the magnetic shielding assembly 1 and the receiving coil 3 along the thickness direction of the PCB 21 is less than 0.1 mm.

[0062] See Figure 4 , the width direction of PCB21 is the first direction (ie Figure 4 In the vertical direction (in the vertical direction), both ends of the first magnetic shielding sheet 11 along the first direction, both ends of the second magnetic shielding sheet 12 along the first direction, and both ends of the filling magnetic shielding sheet 13 along the first direction are in contact with the receiving coil 3. This helps to improve the utilization rate of the magnetic shielding assembly 1 for the space inside the receiving coil 3, and helps to improve the energy conversion efficiency of the pulse generator.

[0063] For example, the first magnetic isolation sheet 11 and the filling magnetic isolation sheet 13 , the second magnetic isolation sheet 12 and the filling magnetic isolation sheet 13 , and any two adjacent magnetic isolation sheets can be fixedly connected by bonding or snapping.

[0064] See Figure 2 In some embodiments, the first magnetic isolation sheet 11 and the filling magnetic isolation sheet 13 may be spaced apart, and the second magnetic isolation sheet 12 and the filling magnetic isolation sheet 13 may be spaced apart.

[0065] In some embodiments, two adjacent magnetic spacer sheets 13 may be spaced apart.

[0066] See Figure 2 In some embodiments, both ends of the first magnetic isolation sheet 11 along the first direction, both ends of the second magnetic isolation sheet 12 along the first direction, and both ends of the filling magnetic isolation sheet 13 along the first direction may also be spaced from the receiving coil 3.

[0067] When the circumference is the same, the circular shape has the largest area. Preferably, in order to allow the receiving coil 3 to receive more magnetic field energy, the receiving coil 3 is wound into a cylindrical spiral structure. In other embodiments, the receiving coil 3 can also be wound into other spiral structures, such as an elliptical cylindrical spiral structure.

[0068] See Figure 1 The present application further provides a neurostimulator comprising the aforementioned pulse generator. Because the pulse generator has a high energy conversion efficiency, it maintains sufficient energy conversion efficiency even when the pulse generator is made smaller. By employing the aforementioned pulse generator, the pulse generator can be made smaller, thereby miniaturizing the neurostimulator.

[0069] See Figure 1 and Figure 2 The neurostimulator includes a housing 6, within which the pulse generator is located, and which protects the pulse generator. Preferably, the housing 6 is formed by injection molding epoxy resin onto the surface of the pulse generator. This allows the housing 6 to completely adhere to the pulse generator, thereby increasing the rigidity of the neurostimulator and making full use of space, thereby reducing the size of the neurostimulator.

[0070] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and such modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A pulse generator, characterized in that: include: The magnetic isolation component (1) is made of a magnetic isolation material and comprises a first magnetic isolation piece (11), a second magnetic isolation piece (12) and a filling magnetic isolation piece (13), wherein the first magnetic isolation piece (11) and the second magnetic isolation piece (12) are arranged opposite to each other; A PCBA (2) comprising a PCB (21) and electronic components (22), wherein the electronic components (22) are fixed to the PCB (21) and located between the first magnetic isolation sheet (11) and the second magnetic isolation sheet (12); and A receiving coil (3) is sleeved outside the first magnetic isolation sheet (11), the second magnetic isolation sheet (12) and the PCBA (2); a side of the first magnetic isolation sheet (11) away from the second magnetic isolation sheet (12) and the receiving coil (3) together enclose a first space (4); a side of the second magnetic isolation sheet (12) away from the first magnetic isolation sheet (11) and the receiving coil (3) together enclose a second space (5); The magnetic isolation filler sheet (13) is arranged in the first space (4) or the second space (5).

2. The pulse generator according to claim 1, characterized in that The magnetic isolation assembly (1) comprises a plurality of filling magnetic isolation sheets (13), at least one of the filling magnetic isolation sheets (13) is arranged in the first space (4), and at least one of the filling magnetic isolation sheets (13) is arranged in the second space (5).

3. The pulse generator according to claim 2, characterized in that Only one magnetic isolation plate (13) is provided in the first space (4), and the magnetic isolation plate (13) in the first space (4) is arranged in close contact with the first magnetic isolation plate (11).

4. The pulse generator according to claim 2, characterized in that A plurality of magnetic isolation plates (13) are provided in the first space (4), and the magnetic isolation plates (13) in the first space (4) are stacked in sequence along the thickness direction of the PCB (21).

5. The pulse generator according to claim 3, characterized in that The first magnetic isolation sheet (11) and each of the filling magnetic isolation sheets (13) located in the first space (4) are arranged in pairs.

6. The pulse generator according to claim 2, characterized in that Only one magnetic isolation plate (13) is provided in the second space (5), and the magnetic isolation plate (13) in the second space (5) is arranged in close contact with the second magnetic isolation plate (12).

7. The pulse generator according to claim 2, characterized in that A plurality of magnetic isolation plates (13) are provided in the second space (5), and the magnetic isolation plates (13) in the second space (5) are stacked in sequence along the thickness direction of the PCB (21).

8. The pulse generator according to claim 7, characterized in that The second magnetic isolation sheet (12) and each of the filling magnetic isolation sheets (13) located in the second space (5) are arranged in pairs.

9. The pulse generator according to any one of claims 1 to 7, characterized in that: The width direction of the PCB (21) is a first direction, and both ends of the first magnetic isolation sheet (11) along the first direction, both ends of the second magnetic isolation sheet (12) along the first direction, and both ends of the filling magnetic isolation sheet (13) along the first direction are in contact with the receiving coil (3).

10. A neurostimulator, characterized in that: A pulse generator comprising any one of claims 1 to 9.

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