Implantation magnetic suction device and artificial implantation equipment

Abstract

The invention discloses an implantation magnetic suction device and artificial implantation equipment, and the device comprises a housing which is internally provided with a supporting device; the cylindrical magnetic core is packaged in the shell and magnetized in the radial direction, and the magnetic core is installed in the shell through a supporting device of the shell; when the magnetic core is subjected to the torque effect, the magnetic core rotates around the central axis of the cylinder, and the shell is fixed. According to the structure, the rotation resistance of the magnetic core can be effectively reduced through low-resistance rotation of the magnetic core, the impact deformation resistance of the magnet can be further enhanced through the arrangement of the supporting structure, and the risk that the magnetic core cannot rotate or rotation is blocked is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of otolaryngology medical instruments, and more particularly to an implantable magnetic attraction device and an artificial implantation device. Background Art

[0002] Currently, neurostimulation products that are being widely used and developed, such as cochlear implants, brain nerve stimulators, and artificial vision systems, often have built-in implanted magnets to achieve the purpose of adsorbing external devices to facilitate signal transmission. Since the internal implant and the external device need to be positioned by the magnetic pole adsorption force of the magnet, so that the internal implant and the external device can exchange information and transmit energy, a magnetic device that can be implanted in the human body for a long time is needed. At present, the conventional implanted magnet device is to encapsulate a disk-shaped magnetic core in a thin-walled metal shell. The disk-shaped magnetic core has north-south magnetic dipoles. The north-south magnetic dipoles of the disk-shaped magnetic core are perpendicular to the skin of the implanter to generate internal magnetic field lines. The external device includes a transmitting coil and an adjustment magnet. The adjustment magnet is to encapsulate a cylindrical magnetic core in a thin-walled plastic shell. The cylindrical magnetic core also has north-south magnetic dipoles. The north-south magnetic dipoles of the cylindrical magnetic core are perpendicular to the skin of the implanter to generate external magnetic field lines. The external adjustment magnet and the implanted magnet device attract each other to fix the external transmitting coil and the implant receiving coil in position. When the recipient undergoes a magnetic resonance imaging (MRI) examination, a problem arises, that is, the magnetization direction of the implanted magnet device is perpendicular to the recipient's skin, and there is an angle between it and the direction of the external magnetic field applied by the MRI. Therefore, the external magnetic field from the MRI can generate torque on the magnetic core of the implanted magnet device, and this torque can shift the implanted magnet device or the entire implant from the correct position. Therefore, recipients with these implanted devices are usually prohibited from undergoing magnetic resonance imaging (MRI) examinations, because the magnets in these implanted devices will shift and flip under the influence of the external magnetic field during the MRI examination, which will not only cause damage to the implanted device, but also cause damage to human tissue. Summary of the invention

[0003] In order to solve the problem of implanted equipment and human body damage during MRI examination, the present invention provides a magnetic suction device and an artificial implanted equipment.

[0004] The implantable magnetic attraction device of the present invention comprises: a shell with a supporting device inside; a radially magnetized cylindrical magnetic core encapsulated in the shell, and the magnetic core is installed inside the shell through the supporting device of the shell; when the magnetic core is subjected to torque, it rotates around the central axis of the cylinder, and the shell is fixed.

[0005] Optionally, the shell includes an outer shell body and an outer shell cover, the magnetic core is located in a cavity surrounded by the outer shell body, and the outer shell cover closes an opening of the outer shell body; the supporting device is located at a position of the outer shell body and / or the outer shell cover corresponding to the central axis of the magnetic core.

[0006] Optionally, the support structure is cylindrical, a through hole is provided at the position of the central axis of the magnetic core, and the support structure passes through the through hole of the magnetic core.

[0007] Optionally, a lubrication structure is also included between the circular upper and lower surfaces of the magnetic core and the outer shell.

[0008] Optionally, the support structure is located inside the outer shell cover, and the lubrication structure includes a lubrication disc located between the lower surface of the magnetic core and the outer shell, and a lubrication disc with holes located between the upper surface of the magnetic core and the outer shell cover.

[0009] Optionally, the material of the lubricating disc and the lubricating disc with holes is at least one of polytetrafluoroethylene, polyetheretherketone, polyethylene, or a combination thereof.

[0010] Optionally, a gap between the outer shell and the magnetic core is larger than a gap between the central through hole of the magnetic core and the supporting structure.

[0011] Optionally, it also includes a first nested component located between the supporting structure and the through hole of the magnetic core and a second nested component located between the through hole of the magnetic core and the magnetic core, the inner surface of the first nested component and the outer surface of the second nested component are provided with a spherical convex structure, and the supporting structure surface of the outer shell cover and the through hole surface of the magnetic core are provided with positioning holes; the first nested component is installed on the supporting structure of the outer shell cover and fixed by the positioning hole of the outer shell cover, and the second nested component is installed in the through hole of the magnetic core and fixed by the positioning hole of the magnetic core.

[0012] Optionally, a height of the first nested component is the same as a height of the support structure, and a height of the second nested component is the same as a height of the magnetic core.

[0013] Optionally, the height of the first nested component is the same as that of the second nested component, the magnetic core is fixed on the second nested component and the height of the magnetic core is less than that of the second nested component, the magnetic core is suspended on the second nested component, and the magnetic core does not contact the outer shell and the outer shell cover.

[0014] Optionally, the supporting structure includes an outward convex cylinder arranged on the outer shell and the outer shell cover, and the upper and lower surfaces of the magnetic core have cylindrical inner grooves. The magnetic core is assembled between the outward convex cylinders of the outer shell and the outer shell cover, and the outward convex cylinder is located in the inner groove of the magnetic core. Except for the central inner groove, the rest of the surfaces of the magnetic core are in a suspended state.

[0015] In addition, the present invention also provides an artificial implant device including the above-mentioned implant magnetic attraction device.

[0016] The low-resistance rotation of the magnetic core can effectively reduce the resistance to the rotation of the magnetic core. Further, the setting of the supporting structure can enhance the anti-impact deformation ability of the magnet, greatly reducing the risk of the magnetic core being unable to rotate or being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, in which like reference numerals generally represent like components.

[0018] Figure 1 It is a cross-sectional view of the implantable magnetic attraction device according to the first embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the assembly of the implantable magnetic attraction device according to the first embodiment of the present invention;

[0020] Figure 3 A schematic diagram showing the position of the implanted magnetic device during the MRI compatible examination.

[0021] Figure 4 It is a schematic diagram of the position and force of the internal magnetic core of the implantable magnetic attraction device of the first embodiment of the present invention when the magnet is erected;

[0022] Figure 5 It is a schematic diagram of the position and force of the internal magnetic core of the magnetic attraction device in the prior art when the magnet is erected;

[0023] Figure 6 A schematic diagram of the outer shell of the implantable magnetic attraction device according to an embodiment of the present invention;

[0024] Figure 7 It is a cross-sectional view of an implantable magnetic attraction device according to an embodiment of the present invention;

[0025] Figure 8 for Figure 7 A schematic diagram of a three-dimensional installation of an implantable magnetic attraction device according to the embodiment shown;

[0026] Fig. 9 It is a cross-sectional view of an implantable magnetic attraction device according to an embodiment of the present invention;

[0027] Fig.10 It is a cross-sectional view of an implantable magnetic attraction device according to an embodiment of the present invention;

[0028] Fig.11 This is a cross-sectional view of an implantable magnetic attraction device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art. In order to facilitate the understanding of the present invention, components that are not essential to the present invention are also illustrated in the drawings, but the non-essential parts do not limit the present invention.

[0030] The present invention provides an implantable magnetic device, comprising: a shell with a support device inside; a radially magnetized cylindrical magnetic core encapsulated in the shell, the magnetic core being installed inside the shell through the support device of the shell; when the magnetic core is subjected to torque, it rotates around the central axis of the cylinder, and the shell is fixed. The following describes in detail the embodiments of various schemes in combination with the use of the implantable magnetic device of the present invention in magnetic resonance imaging (MRI). The implantable magnetic device of the present invention can be the human implant part of an auditory implant device or a vestibular implant device, such as an implanted cochlear implant, a cranial nerve stimulator, or an implanted part of an artificial visual system.

[0031] First embodiment

[0032] refer to Figure 1 and Figure 2 , according to a specific embodiment of the present invention, as Figure 1 As shown, the implantable magnetic device 101 is composed of an outer shell 1011, an outer shell cover 1012, a magnetic core 1013, a lubricating disc 1014, and a lubricating disc with holes 1015. The inner part of the outer shell has a supporting structure 1016. Specifically, the supporting structure 1016 can be located on the outer shell cover 1012 or at the bottom of the outer shell 1011. The supporting device is located at the position of the outer shell and / or the outer shell cover corresponding to the central axis of the magnetic core. The magnetic core 1013 is a radially magnetized cylindrical shape. The magnetic core 1013 is installed in the cavity surrounded by the outer shell through the supporting structure 1016 of the outer shell, and the outer shell cover closes the opening of the outer shell. The outer shell 1011 and the outer shell cover 1012 form the outer shell of the magnet device, which is sealed by laser welding in this embodiment.

[0033] In this embodiment, the support structure is located inside the outer shell cover, and the lubricating structure includes a lubricating disc located between the lower surface of the magnetic core and the outer shell, and a lubricating disc with holes located between the upper surface of the magnetic core and the outer shell cover. The magnetic core 1013, the lubricating disc 1014 and the lubricating disc with holes 1015 are encapsulated inside the outer shell of the magnet device. Figure 2As shown, the support device is located at the position of the outer shell and / or the outer shell cover corresponding to the central axis of the magnetic core. In this embodiment, the convex cylinder in which the support device is located at the center of the outer shell cover is used as an example for explanation. The support structure is cylindrical, and the position of the central axis of the magnetic core has a through hole, and the support structure passes through the through hole of the magnetic core. During installation, the lubricating disc 1014 is placed at the bottom of the outer shell 1011, the magnetic core 1013 is placed above the lubricating disc 1014, and the perforated lubricating disc 1015 is placed above the magnetic core 1013. The support device on the outer shell cover 1012 of the magnet, that is, the convex cylinder, passes through the through holes of the perforated lubricating disc 1015 and the magnetic core 1013 in sequence. When the magnetic core is subjected to torque, it rotates around the central axis of the cylinder, and the outer shell is fixed.

[0034] In other embodiments, the supporting structure on the outer shell cover 1012 may be other structures, and may also be replaced on the outer shell 1011, such as an outward convex cylinder at the center of the inner bottom surface of the outer shell.

[0035] In terms of material selection, the outer shell 1011 and the outer shell cover 1012 will be in direct contact with human tissues and body fluids, so they need to be made of biocompatible paramagnetic metals, such as titanium or titanium alloys; the magnetic core 1013 can adsorb the in vitro adjustment magnet to fix the in vitro equipment, and the material can be permanent magnetic material, such as samarium cobalt, neodymium iron boron, etc.; the lubricating disc 1014 and the perforated lubricating disc 1015 play a lubricating role, and materials with a low friction coefficient can be selected, such as polytetrafluoroethylene, polyetheretherketone, polyethylene, etc.

[0036] In terms of size, the diameter of the magnet device outer shell 1011 and the outer shell cover 1012 can be 10 mm to 15 mm, the wall thickness can be 0.2 mm to 0.3 mm, and the overall height can be 2.5 to 2.8 mm; the supporting structure of the outer shell cover 1012, namely Figure 2 The diameter of the inner and outer convex cylinders can be 1 to 3 mm; the thickness of the lubricating disc 1014 and the lubricating disc with holes 1015 can be 0.05 to 0.1 mm. When designing the size, the gap Δ1 between the outer shell 1011 and the magnetic core 1013 is controlled to be larger than the gap Δ2 between the central through hole of the magnetic core 1013 and the supporting structure of the outer shell cover 1012, that is, Δ1>Δ2, so as to ensure that the outer wall of the magnetic core 1013 cannot contact the outer shell 1011, such as Δ1 is 0.1 mm and Δ2 is 0.05 mm, so as to better reduce the friction resistance.

[0037] like Figure 3 As shown in Figure 1, when a cochlear implant recipient undergoes an MRI examination, they usually lie in a supine position with their head held vertically upward. At this time, the magnet in the implant is in an upright position, as shown in Figure 1. Figure 4The magnetic core 1013 is suspended on the support structure of the housing cover 1012 under the action of gravity. When the MRI device starts working, the external magnetic field B generated by the device will apply a torque T to the magnetic core 1013. However, due to the friction f=μG (μ is the friction coefficient, G is the gravity of the magnetic core 1013) between the magnetic core 1013 and the support structure of the housing cover 1012, the magnetic core 1013 will be subjected to a resistance torque T caused by the friction. f = rf (r is the radius of the central through hole of the magnetic core 1013), if the magnetic field torque T is greater than the resistance torque T f , the magnetic core 1013 can rotate normally, otherwise, the magnetic core cannot rotate alone, and the magnetic core will drive the entire implant device to rotate and cause damage to human tissue. Therefore, reducing the resistance torque caused by friction can greatly reduce the risk of the magnetic core being unable to rotate or being blocked.

[0038] For example Figure 5 In the prior art shown in FIG. 1 , the contact point between the magnetic core and the housing is located at the bottom of the magnetic core, and the resistance torque caused by the friction force is T f =Rf=RμG (R is the radius of the magnetic core). The radius r of the central through hole of the magnetic core 1013 of the present invention is much smaller than the radius R of the magnetic core. Therefore, the resistance torque of the magnetic core in the present invention is much smaller than the resistance torque of the magnetic core in the prior art, which can greatly reduce the risk of the magnetic core being unable to rotate or being blocked.

[0039] At the same time, since the support structure of the magnet shell of this scheme becomes the central support of the internal space of the magnet after the magnetic attraction device is packaged, when the magnetic attraction device is subjected to external impact, the deformation resistance of the shell can be enhanced to ensure the sealing and safety of the magnetic attraction device.

[0040] In other embodiments, the lubricating disc 1014 and the perforated lubricating disc 1015 can be replaced by a lubricating coating, that is, the lubricating coating is sprayed on the surface of the outer shell 1011, the outer shell cover 1012 and the magnetic core 1013 to achieve the purpose of reducing friction and reducing surface wear. The lubricating coating can be made of materials such as polytetrafluoroethylene and polyetheretherketone.

[0041] Second embodiment

[0042] In a specific embodiment, the support structure is located on the outer shell 1011 and is an outward convex cylinder located at the center of the inner bottom surface of the outer shell, such as Figure 6 shown.

[0043] In a specific embodiment, in order to reduce the friction loss between the supporting structure of the housing cover and the through hole of the magnetic core, as shown in FIG. Figure 7 and Figure 8As shown, a lubricating nested component, a first nested component 1026 and a second nested component 1027 can be added between the supporting structure of the outer shell cover and the through hole of the magnetic core. The first nested component 1026, the second nested component 1027, the outer shell 1021, the outer shell cover 1022, and the magnetic core 1023 together constitute an implantable magnetic suction device. Among them, the inner surface of the first nested component 1026 and the outer surface of the second nested component 1027 are provided with a spherical convex structure, and the supporting structure of the outer shell cover 1022 and the through hole surface of the magnetic core 1023 are provided with positioning holes matching the spherical convex structure. The first nested component 1026 is installed on the supporting structure of the outer shell cover 1022 and is fixed by placing the spherical convex structure in the positioning hole. In this embodiment, the height of the first nested component 1026 is the same as the length of the supporting device of the housing cover 1022, such as 2.2 mm; the second nested component 1027 is installed in the through hole of the magnetic core 1023, fixed by the spherical convex structure and the positioning hole, and the height of the second nested component 1027 is the same as the height of the magnetic core 1023, such as 2 mm. The fixing method of the first nested component 1026 and the second nested component 1027 is not limited to inlaying, threading, bonding, laser welding, etc. The materials of the first nested component 1026 and the second nested component 1027 can be selected from ceramics, polyetheretherketone, polytetrafluoroethylene, polyethylene and mixtures thereof, glass fiber reinforcement, carbon fiber reinforcement, etc.

[0044] Third embodiment

[0045] In a specific implementation, compared with the second embodiment, the nested components are improved to form a magnetic core suspended magnetic attraction device, such as Fig. 9 As shown, the height of the first nested component is the same as the height of the second nested component, the magnetic core is fixed on the second nested component and the height of the magnetic core is less than the height of the second nested component. Since the height of the second nested component 1037 is changed to be the same as that of the first nested component 1026, the magnetic core 1023 is fixed on the second nested component 1037 and the height of the magnetic core 1023 is less than that of the second nested component 1037, so the magnetic core 1023 is suspended on the second nested component 1037, and the magnetic core 1023 does not contact the outer shell 1021 and the outer shell cover 1022, and the gap between the upper and lower circular surfaces of the magnetic core 1023 and the outer shell 1021 and the outer shell cover 1022 can be 0.05-0.15 mm. When the magnetic core 1023 rotates, the friction force is concentrated between the first nested component 1026, the second nested component 1037 and the outer shell 1021 and the outer shell cover 1022. Since the relative friction coefficient between the first nested component 1026 and the second nested component 1027 is very small and the force arm of the rotational resistance torque is very short, the rotational resistance torque of the internal components of the magnet is very small when the magnetic core 1023 rotates, and the rotation of the magnetic core is smoother.

[0046] Embodiment 4

[0047] In a specific embodiment, Fig.10 As shown, the support structure includes an outward convex cylinder arranged on the outer shell and the outer shell cover, and the upper and lower surfaces of the magnetic core have cylindrical inner grooves. The magnetic core is assembled between the outward convex cylinders of the outer shell and the outer shell cover, and the outward convex cylinder is located in the inner groove of the magnetic core. Except for the center inner groove, the rest of the surfaces of the magnetic core are in a suspended state. A part of the support structure is located on the bottom surface of the outer shell 1041, and the other part is located on the inner surface of the outer shell cover 1042. The outward convex short cylinder on the bottom surface of the outer shell and the outward convex short cylinder on the inner surface of the outer shell cover together constitute the support structure. Correspondingly, there are cylindrical inner groove designs on the upper and lower surfaces of the magnetic core 1043. In this scheme, the magnetic core 1043 is assembled between the outward convex short cylinders of the outer shell 1041 and the outer shell cover 1042, and the outward convex short cylinder is located in the cylindrical inner groove of the magnetic core. At this time, except for the surface of the center inner groove, the rest of the surfaces of the magnetic core 1043 are in a suspended state. Regardless of whether the magnet device 103 is in a horizontal state or a vertical state, the contact position between the magnetic core 1033 and other components when rotating is limited to the inner groove surface of the magnetic core 1033 .

[0048] In a specific embodiment, the housing of the magnetic device can be symmetrically designed to reduce production costs, such as Fig.11 shown.

[0049] In addition, the present invention also provides an artificial implant device including the above-mentioned implant magnetic attraction device, such as an artificial cochlear implant, a brain nerve stimulator, an artificial vision system, etc.

[0050] The present invention can accurately adjust the stimulation parameters through an external control device, and can also transmit the stimulation status back to the external control device, thereby realizing convenient and intelligent control.

Claims

1. An implantable magnetic device, characterized in that: include: A housing having a supporting device therein; A radially magnetized cylindrical magnetic core encapsulated in the housing, the magnetic core being mounted inside the housing through a supporting device of the housing; When the magnetic core is subjected to torque, it rotates around the central axis of the cylinder, while the outer shell remains stationary.

2. The implantable magnetic device according to claim 1, characterized in that: The shell comprises a shell body and a shell cover, the magnetic core is located in a cavity surrounded by the shell body, and the shell cover seals the opening of the shell body; the supporting device is located at a position of the shell body and / or the shell cover corresponding to the central axis of the magnetic core.

3. The implantable magnetic device according to claim 2, characterized in that: The support structure is cylindrical, a through hole is provided at the position of the central axis of the magnetic core, and the support structure passes through the through hole of the magnetic core.

4. The implantable magnetic device according to claim 3, characterized in that: The invention also comprises a lubrication structure located between the circular upper and lower surfaces of the magnetic core and the shell.

5. The implantable magnetic device according to claim 4, characterized in that: The support structure is located inside the outer shell cover, and the lubricating structure comprises a lubricating disc located between the lower surface of the magnetic core and the outer shell, and a lubricating disc with holes located between the upper surface of the magnetic core and the outer shell cover.

6. The implantable magnetic device according to claim 5, characterized in that: The materials of the lubricating disc and the lubricating disc with holes are at least one of polytetrafluoroethylene, polyetheretherketone, polyethylene or a combination thereof.

7. The implantable magnetic device according to claim 3, characterized in that: The gap between the outer shell and the magnetic core is larger than the gap between the central through hole of the magnetic core and the supporting structure.

8. The implantable magnetic device according to claim 7, characterized in that: It also includes a first nested component located between the support structure and the through hole of the magnetic core and a second nested component located between the through hole of the magnetic core and the magnetic core, the inner surface of the first nested component and the outer surface of the second nested component are provided with a spherical convex structure, and at the same time, the support structure surface of the outer shell cover and the through hole surface of the magnetic core are provided with positioning holes; the first nested component is installed on the support structure of the outer shell cover and fixed by the positioning hole of the outer shell cover, and the second nested component is installed in the through hole of the magnetic core and fixed by the positioning hole of the magnetic core.

9. The implantable magnetic device according to claim 8, characterized in that: The height of the first nested component is the same as the height of the support structure, and the height of the second nested component is the same as the height of the magnetic core.

10. The implantable magnetic device according to claim 8, characterized in that: The height of the first nested component is the same as that of the second nested component, the magnetic core is fixed on the second nested component and the height of the magnetic core is less than that of the second nested component, the magnetic core is suspended on the second nested component, and the magnetic core does not contact the outer shell and the outer shell cover.

11. The implantable magnetic device according to claim 2, characterized in that: The support structure includes an outward convex cylinder arranged on the outer shell and the outer shell cover, and the upper and lower surfaces of the magnetic core have cylindrical inner grooves. The magnetic core is assembled between the outward convex cylinders of the outer shell and the outer shell cover, and the outward convex cylinder is located in the inner groove of the magnetic core. Except for the central inner groove, the rest of the surfaces of the magnetic core are in a suspended state.

12. An artificial implant device comprising the implanted magnetic attraction device according to any one of claims 1 to 11.

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