Implanted magnet device for nerve stimulation system and nerve stimulation system

Abstract

The invention provides an implanted magnet device for a nerve stimulation system and the nerve stimulation system. The nerve stimulation system comprises an in-vitro assembly and an in-vivo assembly, wherein the in-vivo assembly comprises the implanted magnet device; the implanted magnet device comprises an implanted magnet and a packaging shell; the implanted magnet comprises a rotatable magnetic core, and the magnet type of the magnetic core is a radial magnetizing magnet; the implanted magnet is installed in the packaging shell, and the top of the implanted magnet is flush with the top of the packaging shell. The magnet implanting device can reduce the adsorption distance with an in-vitro magnet, improve the adsorption force to an in-vitro assembly and adapt to MRI (Magnetic Resonance Imaging) examination.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and more particularly, to an implant magnet device and a nerve stimulation system for a nerve stimulation system. Background Art

[0002] Currently, nerve stimulation systems such as cochlear implants, cranial nerve stimulators, and artificial vision systems have been widely used. These systems consist of two parts: an in-vivo component and an external component. The in-vivo component is implanted inside the human body, while the external component is mounted outside the human body. Precise central positioning is achieved between the in-vivo component and the external component through magnetic pole adsorption force, thereby facilitating effective information interaction and energy transmission.

[0003] In related technologies, the in-vivo component includes an implant magnet device. This implant magnet device has the following problems: First, the implant magnet in this implant magnet device is encapsulated in silicone. Since silicone has a certain thickness, it is equivalent to increasing the adsorption coupling distance between the implant magnet device and the external component, affecting the adsorption force between the in-vivo component and the external component, and causing the external component to easily fall off. Additionally, this implant magnet cannot adapt to MRI magnetic resonance examinations, affecting the user experience.

[0004] In view of this, the present application is specifically proposed. Summary of the Invention

[0005] The first objective of the present invention is to provide an implant magnet device for a nerve stimulation system. The overall structure of this device is simple. It can reduce the adsorption distance between the implant magnet and the external magnet on the premise of firmly fixing the implant magnet, improve the adsorption force on the external component, and thus prevent the external component from falling off. Moreover, this device can adapt to MRI examinations, which helps to improve the user experience.

[0006] The second objective of the present invention is to provide a nerve stimulation system. By applying the above implant magnet device, this nerve stimulation system can not only improve the adsorption force on the external component but also adapt to MRI examinations.

[0007] To achieve the above objectives of the present invention, the following technical solutions are specifically adopted: The present invention provides an implant magnet device for a nerve stimulation system. The nerve stimulation system includes an external component and an in-vivo component, and the in-vivo component includes the implant magnet device; The implant magnet device includes: an implant magnet and a packaging shell; the implant magnet includes a rotatable magnetic core, and the magnet type of the magnetic core is a radially magnetized magnet; the implant magnet is installed inside the packaging shell, and the top of the implant magnet is flush with the top of the packaging shell.

[0008] Exemplarily, a slot is provided on the encapsulation housing, and a card slot extends outward from the bottom of the slot; The implanted magnet further includes a magnet housing, and the magnetic core is rotatably disposed within the magnet housing; the middle of the magnet housing protrudes upward, and the edge has a card block adapted to the card slot.

[0009] Exemplarily, a transition groove is formed between the card block and the middle of the magnet housing, and a card slot flange adapted to the transition groove is formed by downward depression between the slot and the card slot.

[0010] Exemplarily, the magnet housing has a chamber with a downward opening, and a cover plate is installed at the bottom of the magnet housing.

[0011] Exemplarily, a collar is disposed within the chamber, and the collar is sleeved on the magnetic core.

[0012] Exemplarily, gaskets are provided between the top of the magnetic core and the top of the chamber, and between the bottom of the magnetic core and the cover plate.

[0013] Exemplarily, the height of the collar is less than the height of the magnetic core, and the outer diameter of the collar is less than the diameter of the gasket.

[0014] Exemplarily, the top of the magnetic core protrudes upward to form a protruding structure, and the diameter of the protruding structure is less than the diameter of the bottom of the magnetic core.

[0015] Exemplarily, the extracorporeal assembly includes an extracorporeal magnet, and the extracorporeal magnet is a radially magnetized magnet; the shape of the extracorporeal magnet is disc-shaped; the side with the larger diameter of the magnetic core adsorbs to the extracorporeal magnet; Or, the extracorporeal assembly includes an extracorporeal magnet, and the extracorporeal magnet is a radially magnetized magnet; the shape of the extracorporeal magnet is disc-shaped; the side with the smaller diameter of the magnetic core adsorbs to the extracorporeal magnet; Or, the extracorporeal assembly includes an extracorporeal magnet, and the extracorporeal magnet is a radially magnetized magnet; the extracorporeal magnet has the same shape as the magnetic core; the side with the larger diameter of the magnetic core adsorbs to the side with the larger diameter of the extracorporeal magnet; Or, the extracorporeal assembly includes an extracorporeal magnet, and the extracorporeal magnet is a radially magnetized magnet; the extracorporeal magnet has the same shape as the magnetic core; the side with the smaller diameter of the magnetic core adsorbs to the side with the smaller diameter of the extracorporeal magnet.

[0016] The present application further provides a nerve stimulation system, including an extracorporeal assembly and an intracorporeal assembly, the intracorporeal assembly including the implanted magnet device according to any one of the above embodiments, and the nerve stimulation system being a cochlear implant, a cranial nerve stimulator or an artificial vision system.

[0017] Compared with the prior art, the implanted magnet device of the above technical solution can not only be compatible with MRI examinations, but also effectively shorten the adsorption distance between the implanted magnet and the external component, thereby significantly enhancing the adsorption force of the implanted magnet on the external component. This improvement to a certain extent prevents the accidental detachment of the external component, greatly improving the user experience and safety. At the same time, when the adsorption force requirement is the same as that in the related art, the nerve stimulation system applying the implanted magnet device of this embodiment can further reduce the size of the external magnet in the external component, improving the wearing comfort.

[0018] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of this application more obvious and understandable, the specific implementation manners of this application are specifically exemplified below. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of this application. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings: Figure 1 A schematic diagram showing an implanted magnet device in the related art; Figure 2 A schematic diagram showing the overall structure of the implanted magnet device of the embodiment of this application; Figure 3 A schematic diagram showing the nerve stimulation system of the embodiment of this application; Figure 4 A schematic diagram showing the encapsulation housing of the embodiment of this application; Figure 5 A schematic diagram showing the internal structure of the implanted magnet of the embodiment of this application; Figure 6 A schematic diagram showing the adsorption of the magnetic core and the external magnet of the first implementation solution of the embodiment of this application; Figure 7 A schematic diagram showing the magnetic core structure of an implementation solution of the embodiment of this application; Figure 8 A schematic diagram showing the adsorption of the magnetic core and the external magnet of the second implementation solution of the embodiment of this application; Figure 9 A schematic diagram showing the adsorption of the magnetic core and the external magnet of the third implementation solution of the embodiment of this application; Figure 10 A schematic diagram showing the adsorption of the magnetic core and the external magnet of the fourth implementation solution of the embodiment of this application; Figure 11Schematic diagram of the adsorption between the magnetic core and the external magnet showing the fifth implementation solution of the embodiments of the present application; Figure 12 Adsorption force curve diagram showing different magnet adsorption methods; Figure 13 Comparison diagram of the maximum magneto - torque of the convex - cake - shaped magnetic core and the round - cake - shaped magnetic core under a 3T static magnetic field.

[0020] In the figure: 1. Encapsulation housing; 101. Groove; 102. Groove flange; 103. Groove; 2. Implanted magnet; 201. Magnetic core; 202. Magnet housing; 203. Transition groove; 204. Block; 205. Collar; 206. Spacer; 207. Cover plate; 3. External component; 4. External magnet; 5. Scalp. Detailed implementation manners

[0021] In the following description, a large number of details are provided to enable a thorough understanding of the present invention. However, those skilled in the art can understand that the following description only relates to the preferred embodiments of the present invention, and the present invention can be implemented without one or more of such details. In addition, to avoid confusion with the present invention, some well - known technical features in the art are not described.

[0022] The implanted magnet device in the related art usually encapsulates a round - cake - shaped magnetic core in a thin - walled metal housing. The round - cake - shaped magnetic core has north - south magnetic dipoles, that is, axially magnetized. The north - south magnetic dipoles are perpendicular to the skin of the implant recipient to generate internal magnetic field lines. The external component includes a transmitting coil and an external magnet. The external magnet encapsulates a cylindrical magnetic core in a thin - walled plastic housing. The cylindrical magnetic core also has north - south magnetic dipoles, and the north - south magnetic dipoles are perpendicular to the skin of the implant recipient to generate external magnetic field lines. The external adjusting magnet attracts and combines with the magnet mechanism implanted in the body to fix the alignment of the external transmitting coil and the implanted receiving coil. Figure 1 Schematic diagram showing an implanted magnet device in the related art. As Figure 1As shown, the implanted magnet device includes a packaging shell and an implanted magnet. The implanted magnet is encapsulated within the packaging shell. The packaging shell is made of silicone. In this case, the silicone covering the implanted magnet increases the adsorption coupling distance between the implanted magnet and the external component, affecting the adsorption force between the internal component and the external component and causing the external component to easily fall off. Additionally, this axially magnetized magnet cannot adapt to MRI examinations with high magnetic field intensities. When the wearer needs to undergo an MRI examination, the internal component needs to be surgically removed first and then implanted back into the user's skin after the examination is completed. However, even during an MRI examination with a low magnetic field intensity, after applying dressing and pressure protection, it is still possible for the implanted magnet in the body to be displaced under the action of the magnetic field, causing discomfort such as pain. In view of this, the present application provides an implanted magnet device for a nerve stimulation system and a nerve stimulation system. This implanted magnet device can reduce the adsorption distance from the external component, prevent the external component from falling off, and can adapt to MRI examinations. The specific structures of this implanted magnet device and nerve stimulation system are described in detail below.

[0023] In order to more clearly illustrate the technical solutions in the present invention, the following will be described in the form of specific embodiments.

[0024] Embodiment Referring in combination to Figures 2-7 , this embodiment provides an implanted magnet device for a nerve stimulation system. The nerve stimulation system includes an external component 3 and an internal component. The internal component includes the implanted magnet device. The implanted magnet device includes: an implanted magnet 2 and a packaging shell 1. The implanted magnet 2 includes a rotatable magnetic core 201, and the magnet type of the magnetic core 201 is a radially magnetized magnet. The implanted magnet 2 is installed within the packaging shell 1, and the top of the implanted magnet 2 is flush with the top of the packaging shell 1.

[0025] In the embodiment as shown in Figure 3 , the external component 3 and the internal component are respectively located on both sides of the scalp 5 of the implant recipient, and the magnetic core 201 in the internal component is positioned and adsorbed with the magnet (i.e., the external magnet 4) in the external component 3.

[0026] In the solution of this embodiment, the material of the packaging shell 1 can be silicone.

[0027] In the solution of this embodiment, the magnet type of the magnetic core 201 is a radially magnetized magnet. A radially magnetized magnet can rotate around the central axis of the magnet at a certain angle in a magnetic field to conform to the magnetic field environment of the MRI and cancel the torque generated by the magnetic field acting on the magnet. Therefore, using a radially magnetized magnet as the magnetic core 201 does not require surgical removal during an MRI examination.

[0028] The inventor's research found that, compared with axially magnetized magnets, when the radial magnets are adsorbed by the corresponding external magnet 4, the magnetic field lines of the radial magnets are more divergent and more magnetic field lines escape. Under the same size, the adsorption force is much weaker than that of the axially magnetized magnets of the same volume. The weakened adsorption force will affect the patient's wearing of the cochlear implant external device. Especially for people with a relatively thick scalp 5, the weakened adsorption force may prevent the patient from wearing the external component 3 normally. If the size and volume of the implanted magnet 2 are increased to improve the adsorption force, in an MRI environment, the torque generated by the magnet will also increase correspondingly, reducing the MRI compatibility of the implant. Therefore, in the solution of this embodiment, the implanted magnet 2 is installed in the encapsulation housing 1, and the top of the implanted magnet 2 is flush with the top of the encapsulation housing 1. Thus, when the external dimension of the encapsulation housing 1 is basically the same as that of the silicone housing in the related art, the implanted magnet 2 can be closer to the scalp 5, which can reduce the adsorption distance between the implanted magnet 2 and the external component 3, helping to improve the adsorption force of the implanted magnet 2 on the external component 3, and thus can avoid the dropping of the external component 3 to a certain extent. In summary, the implanted magnet device of this embodiment can not only be compatible with MRI examinations, but also effectively shorten the adsorption distance between the implanted magnet 2 and the external component 3, thereby significantly enhancing the adsorption force of the implanted magnet 2 on the external component 3. This improvement prevents the accidental detachment of the external component 3 to a certain extent, greatly improving the user experience and safety. At the same time, when the adsorption force requirement is the same as that in the related art, the nerve stimulation system applying the implanted magnet device of this embodiment can further reduce the size of the external magnet 4 in the external component 3, improving the wearing comfort.

[0029] Referring to Figures 3-5 , in this embodiment, a slot 101 is provided on the encapsulation housing 1, and a card slot 103 extends outward from the bottom of the slot 101; the implanted magnet 2 further includes a magnet housing 202, and the magnetic core 201 is rotatably arranged in the magnet housing 202; the middle part of the magnet housing 202 bulges upward, and the edge has a clamping block 204 adapted to the card slot 103. During actual use, the clamping block 204 is embedded in the card slot 103. Through this matching structure, the implanted magnet 2 can be firmly fixed in the encapsulation housing 1. At the same time, this matching structure can increase the thickness of the silicone covering above the clamping block 204, which helps to further improve the holding effect on the implanted magnet 2.

[0030] Referring to Figures 3-5 , in this embodiment, a transition groove 203 is formed between the clamping block 204 and the middle part of the magnet housing 202, and a card slot flange 102 adapted to the transition groove 203 is formed by downward depression between the slot 101 and the card slot 103. As Figure 3 shown, during actual use, the card slot flange 102 and the transition groove 203 are reversely coupled, which helps to further improve the holding effect on the implanted magnet 2.

[0031] As Figure 5 shown, in this embodiment, the magnet housing 202 has a downwardly opening chamber, and a cover plate 207 is mounted at the bottom of the magnet housing 202. The magnetic core 201 is located in this chamber.

[0032] The cover plate 207 can be mounted at the bottom of the magnet housing 202 by any one of methods such as welding, snap connection, screw connection, etc. In the embodiment as Figure 5 shown, the cover plate 207 is mounted at the bottom of the magnet housing 202 by laser welding to seal the chamber inside the magnet housing 202 to form a sealed cavity.

[0033] The above solution has a simple structure, is easy to install, and helps to improve the assembly efficiency of the implanted magnet device.

[0034] Continuing to refer to Figure 5 , in this embodiment, a collar 205 is provided in the chamber, and the collar 205 is sleeved on the magnetic core 201.

[0035] The material of the collar 205 can be selected according to actual needs. In some implementation solutions of this embodiment, the material of the collar 205 is selected as a paramagnetic material with wear resistance and lubricity, for example, it can be PTFE.

[0036] In some implementation solutions of this embodiment, lubricating materials such as PTFE, Parylene, Everlube, etc. can be coated on the inner wall of the chamber and the surface of the magnetic core, which helps to reduce the frictional resistance of the rotation of the magnetic core 201.

[0037] In some implementation solutions of this embodiment, the clearance between the outer diameter of the collar 205 and the inner diameter of the chamber is preferably 0.05 mm, and the collar 205 preferably abuts against the inner wall of the chamber of the magnet housing 202. The clearance between the inner diameter of the collar 205 and the outer diameter of the magnetic core 201 is preferably 0.15 mm. By reasonably setting the mating clearance, it can ensure that the magnetic core 201 rotates freely in the chamber, maximize the reduction of frictional resistance and reduce the phenomenon of the magnetic core 201 getting stuck.

[0038] The above technical solution by providing the collar 205 on the magnetic core 201 helps to reduce the frictional resistance of the rotation of the magnetic core 201 and improve the working reliability of the magnetic core 201.

[0039] Continuing to refer to Figure 5 , in this embodiment, gaskets 206 are provided both between the top of the magnetic core 201 and the top of the chamber and between the bottom of the magnetic core 201 and the cover plate 207.

[0040] The material, thickness, and quantity of the gasket 206 can be selected according to actual needs. In some implementation solutions, the material of the gasket 206 is selected as a paramagnetic material with wear resistance and lubricity, such as PTFE.

[0041] In the embodiment as Figure 5 shown, the number of gaskets 206 between the top of the magnetic core 201 and the top of the chamber is 1, and the number of gaskets 206 between the bottom of the magnetic core 201 and the cover plate 207 is 2. In this embodiment, the inventor considered that there may be a situation where the cover plate 207 and the magnet housing 202 are not tightly attached during laser welding. At this time, a cavity may be formed between the cover plate 207 and the magnet housing 202, and part of the gasket 206 may be embedded in the cavity, resulting in jamming. For this reason, in this embodiment, the number of gaskets 206 between the bottom of the magnetic core 201 and the cover plate 207 is 2. In this case, even if a cavity is formed, the cavity is not large enough to accommodate the thickness of 2 gaskets 206. Assuming one gasket 206 is embedded in the cavity, the other gasket 206 can still ensure the normal operation of the system. In embodiments not shown in this application, only one gasket can also be used, and the thickness of this gasket is greater than the thickness of the possible formed cavity (for example, it can be equal to the thickness of 2 gaskets in the above embodiment).

[0042] In some implementation solutions, the gap between the outer diameter of the gasket 206 and the inner diameter of the chamber can be preferably 0.10 mm, and the gap between the gasket 206 closest to the cover plate 207 and the cover plate 207 can be preferably 0.1 - 0.15 mm. This specific gap setting method can further reduce the frictional force during the rotation of the magnetic core 201.

[0043] The above solution by respectively arranging gaskets 206 at the top and bottom of the magnetic core 201 helps to further reduce the frictional resistance during the rotation of the magnetic core 201, thereby further avoiding the phenomenon of the magnetic core 201 getting stuck.

[0044] In this embodiment, the height of the collar 205 is less than the height of the magnetic core 201, and the outer diameter of the collar 205 is less than the diameter of the gasket 206. In some implementation solutions, the height difference between the collar 205 and the magnetic core 201 can be in the range of [0.05, 0.15] mm. This solution by making the height of the collar 205 less than the height of the magnetic core 201 can avoid the collar 205 being deformed by the gaskets 206 at both the upper and lower ends, and can prevent the collar 205 from detaching from the magnetic core 201.

[0045] In this embodiment, both the magnetic core 201 and the external magnet 4 in the external component 3 are radially magnetized magnets. In some implementation solutions, the shapes of both the magnetic core 201 and the external magnet 4 are disc-shaped, and their adsorption method is as Figure 6 shown. In Figure 6In this case, both the magnetic core 201 and the external magnet 4 have a diameter of 10 mm and a height of 2.4 mm.

[0046] In this embodiment, the shape of the magnetic core 201 can be disc-shaped or an irregular structure. In some implementation solutions of this embodiment, such as Figure 7 As shown, a raised structure is formed by the top of the magnetic core 201 bulging upward. The diameter of the raised structure is smaller than the diameter of the bottom of the magnetic core 201. This shape can be simply referred to as a convex disc shape. The difference between the diameter of the raised structure and the diameter of the bottom of the magnetic core 201 can be in the range of [1 mm, 2 mm]. That is, when the bottom diameter of the magnetic core 201 is 10 mm, the diameter of the raised structure can be 8 - 9 mm. The height of the raised structure can account for half of the total height of the magnetic core 201. When the magnetic core 201 is in the shape of a convex disc, the relative positional relationship between the collar 205 and the magnetic core 201 is as Figure 5 shown.

[0047] In a specific implementation solution of this embodiment, such as Figure 8 shown, the external component 3 includes an external magnet 4, and the external magnet 4 is a radially magnetized magnet; the shape of the external magnet 4 is disc-shaped; the side with the larger diameter of the magnetic core 201 is adsorbed to the external magnet 4. In this implementation solution, the diameter of the external magnet 4 is 10 mm and the height is 2.4 mm; the bottom diameter of the magnetic core 201 is 10 mm, the total height of the magnetic core 201 is 2.4 mm, and the height of the raised structure is 1.2 mm.

[0048] In another specific implementation solution of this embodiment, such as Figure 9 shown, the external component 3 includes an external magnet 4, and the external magnet 4 is a radially magnetized magnet; the shape of the external magnet 4 is disc-shaped; the side with the smaller diameter of the magnetic core 201 is adsorbed to the external magnet 4. In this implementation solution, the diameter of the external magnet 4 is 10 mm and the height is 2.4 mm; the bottom diameter of the magnetic core 201 is 10 mm, the total height of the magnetic core 201 is 2.4 mm, and the height of the raised structure is 1.2 mm.

[0049] In yet another specific implementation solution of this embodiment, such as Figure 10 shown, the external component 3 includes an external magnet 4, and the external magnet 4 is a radially magnetized magnet; the external magnet 4 has the same shape as the magnetic core 201; the side with the smaller diameter of the magnetic core 201 is adsorbed to the side with the smaller diameter of the external magnet 4. The bottom diameter of the magnetic core 201 is 10 mm, the total height of the magnetic core 201 is 2.4 mm, and the height of the raised structure is 1.2 mm. The size of the external magnet 4 is exactly the same as that of the magnetic core 201.

[0050] In still another specific implementation solution of this embodiment, such as Figure 11As shown, the external component 3 includes an external magnet 4, and the external magnet 4 is a radially magnetized magnet; the external magnet 4 has the same shape as the magnetic core 201; the side with a larger diameter of the magnetic core 201 is adsorbed to the side with a larger diameter of the external magnet 4. In this implementation solution, the bottom diameter of the magnetic core 201 is 10 mm, the total height of the magnetic core 201 is 2.4 mm, and the height of the convex structure is 1.2 mm. The size of the external magnet 4 is exactly the same as that of the magnetic core 201.

[0051] Figure 12 The adsorption force curve graphs showing different magnet adsorption methods are shown. In this embodiment, the axial magnetization method in the related art (where the diameters of both the magnetic core 201 and the external magnet 4 are 10 mm) and Figure 6 , 8 , 9, 10, 11 are used for the magnet adsorption methods. As Figure 12 shown, it can be seen that when the adsorption method shown in Figure 11 is adopted and the diameter of the convex structure is 8 - 9 mm, the generated adsorption force is greater than Figure 6 the adsorption force of the conventional radially magnetized disc-shaped magnet shown.

[0052] Figure 13 The maximum magneto-induced torque comparison graph of the convex disc-shaped magnetic core 201 and the disc-shaped magnetic core 201 under a 3T static magnetic field is shown. As Figure 13 shown, it can be seen that when the diameter of the convex structure is 8 - 9 mm, its magneto-induced torque is about 80.8% - 89.2% of that of the disc-shaped magnetic core 201. The reduction of the magneto-induced torque can reduce the MRI scanning risk and relieve the discomfort of the implantee during MRI examination.

[0053] This embodiment also provides a nerve stimulation system, and the structure of the nerve stimulation system is as Figure 3 shown. The nerve stimulation system includes an external component and an internal component. The internal component includes the implant magnet device of the above embodiment, and the nerve stimulation system is a cochlear implant, a cranial nerve stimulator or an artificial vision system.

[0054] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front", "rear", "upper", "lower", "left", "right", "lateral", "vertical", "perpendicular", "horizontal" and "top", "bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the protection scope of the present application; the orientation words "inside" and "outside" refer to the inside and outside relative to the contour of each component itself. For ease of description, regional relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the regional positional relationship between one or more components or features shown in the figure and other components or features. It should be understood that regional relative terms not only include the orientation of components described in the figure, but also different orientations during use or operation. For example, if the components in the attached drawings are inverted as a whole, the component "above other components or features" or "over other components or features" will include the situation where the component is "below other components or structures" or "under other components or structures". Thus, the exemplary term "above" can include both the orientation of "above" and "below". In addition, these components or features can also be positioned at other different angles (such as rotated 90 degrees or other angles), and this document intends to cover all such situations. It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, components, parts and / or combinations thereof. It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of the present application 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 such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. The present application has been illustrated by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and illustration, and are not intended to limit the present application within the scope of the described embodiments. In addition, those skilled in the art can understand that the present application is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present application, and all these variations and modifications fall within the scope claimed by the present application. The protection scope of the present application is defined by the appended claims and their equivalent scope.

Claims

1. An implantable magnet device for a nerve stimulation system, characterized in that, The nerve stimulation system includes an external component and an internal component, and the internal component includes the implanted magnet device; The implanted magnet device includes: an implanted magnet and a packaging shell; the implanted magnet includes a rotatable magnetic core, and the magnet type of the magnetic core is a radially magnetized magnet; the implanted magnet is installed in the packaging shell, and the top of the implanted magnet is flush with the top of the packaging shell.

2. The implant magnet device according to claim 1, characterized in that, A slot is provided on the packaging shell, and a card slot extends outward from the bottom of the slot; The implanted magnet further includes a magnet shell, and the magnetic core is rotatably arranged in the magnet shell; the middle part of the magnet shell bulges upward, and the edge has a clamping block adapted to the card slot.

3. The implant magnet device according to claim 2, wherein, A transition groove is formed between the clamping block and the middle part of the magnet shell, and a card slot flange adapted to the transition groove is formed by downward depression between the slot and the card slot.

4. The implant magnet device according to claim 2, wherein The magnet shell has a chamber with a downward opening, and a cover plate is installed at the bottom of the magnet shell.

5. The implant magnet device according to claim 4, characterized in that, A collar is arranged in the chamber, and the collar is sleeved on the magnetic core.

6. The implant magnet device according to claim 5, wherein Gaskets are arranged between the top of the magnetic core and the top of the chamber and between the bottom of the magnetic core and the cover plate.

7. The implant magnet device according to claim 6, wherein, The height of the collar is less than the height of the magnetic core, and the outer diameter of the collar is less than the diameter of the gasket.

8. The implant magnet device according to any one of claims 1-7, characterized in that, The top of the magnetic core bulges upward to form a convex structure, and the diameter of the convex structure is less than the diameter of the bottom of the magnetic core; Preferably, the height of the convex structure is half of the total height of the magnetic core.

9. The implanted magnet device according to claim 8, wherein the external component includes an external magnet, and the external magnet is a radially magnetized magnet; the shape of the external magnet is disc-shaped; the side with the larger diameter of the magnetic core is adsorbed to the external magnet; or, the external component includes an external magnet, and the external magnet is a radially magnetized magnet; the shape of the external magnet is disc-shaped; the side with the smaller diameter of the magnetic core is adsorbed to the external magnet; or, the external component includes an external magnet, and the external magnet is a radially magnetized magnet; the external magnet has the same shape as the magnetic core; the side with the larger diameter of the magnetic core is adsorbed to the side with the larger diameter of the external magnet; or, the external component includes an external magnet, and the external magnet is a radially magnetized magnet; the external magnet has the same shape as the magnetic core; the side with the smaller diameter of the magnetic core is adsorbed to the side with the smaller diameter of the external magnet.

10. A nerve stimulation system, characterized in that, It includes an external component and an internal component, the internal component includes the implanted magnet device according to any one of claims 1-9, and the nerve stimulation system is a cochlear implant, a cranial nerve stimulator or an artificial vision system.

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