Implantable peripheral nerve electrical stimulation device

Abstract

The embodiment of the invention discloses implantable peripheral nerve electrical stimulation equipment. The implantable peripheral nerve electrical stimulation equipment comprises a main body part, a battery part and a stimulation part, a controller is arranged in the main body part, the battery part comprises a power supply, a coating film, a charging coil and a first shell, the charging coil sleeves the outer side of the power supply, and the coating film is made of a flexible permanent magnet material and coats the outer surface of the power supply to form a magnetic core of the charging coil. According to the embodiment of the invention, the overall structure of the battery part can be supported and protected through the first shell made of an insulating material, and the efficiency of wireless energy and information transmission between the charging coil and the outside can be improved due to the self-insulating characteristic of the first shell, so that the situation that eddy current is generated on the first shell to cause temperature rise is avoided; through the arrangement of the coating film, the charging coil can be matched with a power supply, a magnetic core structure is formed in the center of the charging coil, the charging efficiency is further improved, a charging magnetic field can be shielded, and eddy current is prevented from being generated on a shell of the power supply.

Description

Technical Field

[0001] This application relates to the field of implantable electrical stimulation devices, and more particularly to an implantable peripheral nerve electrical stimulation device. Background Technology

[0002] Chronic / acute pain is a common cause of pain for many patients, especially the elderly, a large proportion of whom have health problems that contribute to pain.

[0003] Currently, electrical / neurostimulation is one of the main treatment methods for chronic pain. Neuromodulation is often used to treat brain diseases. Most existing neuromodulation devices are designed for central nervous system (brain and spinal cord) stimulation. They are large devices with batteries and long leads, usually implanted in large muscle areas such as the chest and buttocks. The long leads extend to large nerve areas such as the brain or spinal cord, using electrical current to stimulate the nerves in the body to treat neurological diseases.

[0004] To avoid the need for regular battery replacements, some implantable peripheral nerve stimulation devices are designed to be rechargeable, with built-in rechargeable batteries and charging receiving coils. However, these devices typically use a stacked configuration for the charging coil, battery, and circuit board, resulting in a larger size and volume. Furthermore, they generally use titanium or titanium alloys as the sealed casing. During wireless charging, the all-metal casing not only generates induced eddy currents, wasting charging energy, but also increases temperature, potentially causing harm to the human body. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an implantable peripheral nerve electrical stimulation device to solve the problems of low charging efficiency and significant heat generation during charging of wirelessly charged, all-metal-cased implantable peripheral nerve electrical stimulation devices.

[0006] This application provides an implantable peripheral nerve electrical stimulation device, comprising: a main body, a battery, and a stimulation part; a controller is disposed within the main body, the battery includes a power source, a covering film, a charging coil, and a first housing, the charging coil is sleeved on the outside of the power source, the covering film is a flexible permanent magnet material and covers the outer surface of the power source to form the magnetic core of the charging coil, the power source and the charging coil are both disposed within the first housing, the first housing is sealed to the main body, and the first housing is made of insulating material; The power supply, the charging coil, and the stimulation part are all electrically connected to the controller.

[0007] Based on the implantable peripheral nerve electrical stimulation device, the first shell made of insulating material can support and protect the overall structure of the battery section. Furthermore, due to the insulating properties of the first shell itself, the efficiency of wireless energy and information transmission between the charging coil and the external body can be improved, avoiding the generation of eddy currents on the first shell and preventing temperature rise. Through the application of a coating film, a magnetic core structure can be formed at the center of the charging coil in conjunction with the power supply, creating a low-impedance magnetic channel, thereby preventing magnetic leakage, increasing the coupling coefficient, improving the magnetoelectric conversion efficiency, and further enhancing charging efficiency. Simultaneously, the magnetic coating film covering the metal casing of the power supply can shield the charging magnetic field, preventing the generation of eddy currents on the metal casing, further reducing heat generation and power loss. Moreover, the flexible coating film and the metal casing of the power supply form a rigid-flexible composite structure, which can suppress magnetostrictive noise caused by high-frequency vibrations.

[0008] Optionally, the main body includes a second housing, which is made of metal and covers the outside of the controller. The first housing and the second housing are sealed together and form a communicating cavity between them.

[0009] Furthermore, based on the second housing made of metal material in the main body, reliable support and protection can be provided for the controller inside. The first housing and the second housing are connected to form a connected cavity that includes two functional areas. One functional area is located inside the first housing made of insulating material and is used to house the power supply and charging coil, etc. The other functional area is located inside the second housing made of metal material and is used to house the controller, etc. The two functional areas are connected to each other or separated from each other by a sealing structure. When a sealing structure is provided between the two functional areas, a connection port for wires or other conductive structures to pass through needs to be left to ensure that the charging coil and the power supply can achieve an electrical connection with the controller through internal wiring.

[0010] Optionally, the first housing includes a metal ring for welding connection with the second housing.

[0011] Furthermore, based on the aforementioned metal ring, it can serve as a connecting bridge between the first shell made of insulating material and the second shell made of metal material, thereby facilitating a reliable sealed connection between the first shell and the second shell. The specific connection method can be welding or bonding, which can achieve both connection and fixation and reliable sealing at the connection point.

[0012] Optionally, the second housing is offset from the charging coil in the axial direction.

[0013] Furthermore, based on the aforementioned positional relationship between the battery section and the main body section, the magnetic field of the charging coil can be prevented from affecting the operation of the controller, and they are relatively independent of each other, thereby improving the reliability of the peripheral nerve electrical stimulation device.

[0014] Optionally, the peripheral nerve electrical stimulation device may further include a power supply bracket; The power supply bracket is an annular bracket sleeved on the outside of the power supply. The power supply bracket is made of insulating material. Both the power supply and the charging coil are mounted on the power supply bracket. The power supply bracket is provided with a winding post for the charging coil to be wound. The covering film is filled between the power supply bracket and the power supply.

[0015] Furthermore, the power supply bracket made of the aforementioned insulating material can provide a reliable support structure for the charging coil and power supply, while also avoiding interference with the wireless charging of the peripheral nerve electrical stimulation device.

[0016] Optionally, the charging coil is disposed on one side of the power supply bracket, and the other side of the power supply bracket is provided with a wireless communication antenna electrically connected to the controller, the wireless communication antenna being matched with the shape of the power supply bracket.

[0017] Furthermore, based on the above-mentioned charging coil and wireless communication antenna being arranged on both sides of the ring-shaped power supply bracket, the charging coil and wireless communication antenna are stacked. The wireless communication antenna can be laser-etched onto the power supply bracket using laser direct forming (LDS) technology, or it can be a metal antenna device separate from the power supply bracket. Specifically, the wireless communication antenna can be made of materials with good conductivity, such as copper, platinum-iridium alloy, nickel, etc., and its shape can be sheet-like or wire-like. The wireless communication antenna can be distributed all over the other side of the power supply bracket used to install the charging coil.

[0018] Optionally, the peripheral nerve electrical stimulation device further includes a controller support, the controller comprising one or more stacked circuit boards, and the controller support including a fixing structure for securing the circuit boards.

[0019] Furthermore, the aforementioned controller bracket enables multi-layer stacking of circuit boards, thereby reducing the space occupied by the controller and effectively shrinking the size of the peripheral nerve stimulation device, thus improving the flexibility of the peripheral nerve stimulation device. At the same time, this stacking arrangement facilitates installation and production, and ensures that internal components and their interconnections are not damaged by vibration or external impact.

[0020] Optionally, the controller bracket is connected to the power supply bracket to form an integrated bracket structure.

[0021] Furthermore, based on the aforementioned support structure, the internal structures of the first and second housings can be connected, improving the overall integrity of the peripheral nerve electrical stimulation device. At the same time, after fixing the power supply, charging coil, wireless communication antenna, and controller, it is convenient to connect the electrical connection structures between them. Specifically, the power supply can be directly connected to the circuit board fixed on the controller support through fixed electrode plates, and the electrode plates further enhance the connection stability between the battery section and the main body section.

[0022] Optionally, the stimulation part includes a stimulation electrode, a third housing, and a fixing component. The third housing is made of insulating material. One end of the stimulation electrode is inserted into the third housing and electrically connected to the main body, while the other end contacts the tissue and is used to achieve electrical stimulation. The stimulation electrode is detachably connected to the third housing through the fixing component.

[0023] Optionally, the stimulation portion further includes at least one electrical connection portion arranged on the stimulation electrode, and each electrical connection portion is fitted with an annular conductive sheet that is electrically connected to the main body portion.

[0024] Furthermore, based on the aforementioned arrangement of the annular conductive sheet, multiple control modes of the stimulation electrode can be achieved, thereby enriching the functionality of the peripheral nerve electrical stimulation device and improving its applicability.

[0025] Optionally, the fixing assembly includes a fixing sleeve, a fixing screw, and a sealing cap. The fixing sleeve is sleeved on the outside of the stimulation electrode and has a threaded hole extending radially thereon. The fixing screw is threadedly connected to the threaded hole. The sealing cap is mounted on the third housing and is positioned opposite the threaded hole. The sealing cap has a cavity that can accommodate the fully unscrewed fixing screw.

[0026] Optionally, the controller and the stimulation part are connected by a deformable connecting wire. The connection between the connecting wire and the main body and the connection between the connecting wire and the stimulation part are provided with a sealing structure. The connecting wire is covered with a sealing layer, which is a flexible insulating material.

[0027] Furthermore, based on the aforementioned connection wire configuration, the overall length of the rigid portion of the peripheral nerve electrical stimulation device can be optimized, breaking down the long rigid portion into two relatively short portions that can undergo relative positional or angular changes. This is suitable for flexible implantation sites of peripheral nerves, especially mobile areas such as the limbs.

[0028] The above-described one or more embodiments of this application have at least one or more of the following beneficial effects: The first shell, made of insulating material, provides support and protection for the overall structure of the battery section. Furthermore, the insulating properties of the first shell improve the efficiency of wireless energy and information transmission between the charging coil and the external environment, preventing eddy currents from forming on the first shell and causing overheating. The coating film, in conjunction with the power supply, forms a magnetic core structure at the center of the charging coil, creating a low-impedance magnetic channel. This prevents magnetic leakage, increases the coupling coefficient, and enhances the magnetoelectric conversion efficiency, further improving charging efficiency. Simultaneously, the magnetic coating film, covering the metal casing of the power supply, shields the charging magnetic field, preventing eddy currents from forming on the metal casing, further reducing heat generation and power loss. Moreover, the flexible coating film and the metal casing of the power supply form a rigid-flexible composite structure, suppressing magnetostrictive noise caused by high-frequency vibrations.

[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0030] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein: Figure 1 This is a schematic diagram of the structure of the implantable peripheral nerve electrical stimulation device described in the embodiments of this application; Figure 2 This is a schematic diagram of the internal structure of the main body and the battery section as described in the embodiments of this application; Figure 3 for Figure 2 A structural diagram of the back side; Figure 4 This is an exploded view of the implantable peripheral nerve electrical stimulation device described in the embodiments of this application; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a schematic diagram of the structure of two stimulation portions, one with a stimulation electrode connected and the other without, as described in an embodiment of this application. Figure 7 A flowchart illustrating the stimulation process of the implantable peripheral nerve electrical stimulation device described in this application embodiment; Figure 8 This is a flowchart illustrating the charging process of the implantable peripheral nerve electrical stimulation device described in this application embodiment.

[0031] Explanation of reference numerals in the attached figures 1. Main body; 11. Controller; 12. Second housing; 2. Battery; 21. Power supply; 22. Covering film; 23. Charging coil; 24. First housing; 241. Metal ring; 25. Wireless communication antenna; 3. Stimulation part; 31. Stimulation electrode; 32. Third housing; 33. Annular conductive sheet; 34. Insulating gasket; 35. Fixing sleeve; 36. Fixing screw; 37. Sealing cover; 41. Power supply bracket; 42. Controller bracket; 5. Connecting wire; 6. Feedthrough. Detailed Implementation

[0032] Some embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0033] Currently, implantable peripheral nerve stimulation devices are also designed to be rechargeable, with built-in rechargeable batteries and charging receiving coils. However, these devices typically use a stacked configuration for the charging coil, battery, and circuit board, resulting in a large size and volume. Furthermore, they generally use titanium or titanium alloy metal as the sealed shell. During wireless charging, the all-metal shell not only generates induced eddy currents, wasting charging energy, but also increases the temperature, potentially causing harm to the human body.

[0034] Based on this, this application provides an implantable peripheral nerve electrical stimulation device that can support and protect the overall structure of the battery section through a first shell made of insulating material. Furthermore, due to the insulating properties of the first shell itself, the efficiency of wireless energy and information transmission between the charging coil and the external body can be improved, avoiding the generation of eddy currents on the first shell and preventing temperature rise. Through the application of a coating film, a magnetic core structure can be formed at the center of the charging coil in conjunction with the power supply, creating a low-impedance magnetic channel, thereby preventing magnetic leakage, increasing the coupling coefficient, improving the magnetoelectric conversion efficiency, and further enhancing charging efficiency. Simultaneously, the magnetic coating film covering the metal casing of the power supply can shield the charging magnetic field, preventing the generation of eddy currents on the metal casing of the power supply, further reducing heat generation and power loss. Moreover, the flexible coating film and the metal casing of the power supply form a rigid-flexible composite structure, which can suppress magnetostrictive noise caused by high-frequency vibrations.

[0035] The present application will be described in detail below through specific embodiments.

[0036] Reference Figures 1 to 6As shown, this embodiment provides an implantable peripheral nerve electrical stimulation device, including: a main body 1, a battery 2, and a stimulation part 3; a controller 11 is disposed inside the main body 1; the battery 2 includes a power source 21, a covering film 22, a charging coil 23, and a first housing 24; the charging coil 23 is sleeved on the outside of the power source 21; the covering film 22 is a flexible permanent magnet material and covers the outer surface of the power source 21 to form the magnetic core of the charging coil 23; that is, the covering film 22 is magnetic and can adhere to the outer surface of the power source 21, forming a magnetic core structure located at the center of the charging coil 23; the power source 21 and the charging coil 23 are both disposed inside the first housing 24; the first housing 24 is sealed to the main body 1; the first housing 24 is an insulating material; it should be understood that the material of the first housing 24 is a rigid material that can fix its shape, so as to ensure that the first housing 24 can provide reliable protection and support for the internal structures such as the power source 21 and the charging coil 23; the power source 21, the charging coil 23, and the stimulation part 3 are all electrically connected to the controller 11.

[0037] The implantable peripheral nerve electrical stimulation device provided in this embodiment can support and protect the overall structure of the battery section 2 through the first housing 24 made of insulating material. Furthermore, due to the insulating properties of the first housing 24 itself, the efficiency of wireless energy and information transmission between the charging coil 23 and the external body can be improved, and eddy currents can be avoided on the first housing 24 to prevent temperature rise. Through the setting of the covering film 22, it can cooperate with the power supply 21 to form a magnetic core structure at the center of the charging coil 23, forming a low-impedance magnetic channel, thereby avoiding magnetic leakage, improving the coupling coefficient, improving the magnetoelectric conversion efficiency, and further improving the charging efficiency. At the same time, the magnetic covering film 22 is set on the metal shell of the power supply 21, which can shield the magnetic field of charging, avoid the generation of eddy currents on the metal shell of the power supply 21, and further reduce heat generation and power loss. In addition, the flexible covering film 22 and the metal shell of the power supply 21 form a rigid-flexible composite structure, which can suppress magnetostrictive noise caused by high-frequency vibration.

[0038] In some embodiments, the main body 1 includes a second housing 12, which is made of metal and covers the outside of the controller 11. The first housing 24 is sealed to the second housing 12, and a communicating cavity is formed between them. It should be understood that the controller 11 and the power supply 21 and other structures are completely isolated from the internal environment of the human body through the sealed connection of the first housing 24 and the second housing 12.

[0039] Furthermore, based on the second housing 12 made of metal material in the main body 1, reliable support and protection can be provided for the controller 11 inside. After the first housing 24 and the second housing 12 are connected, they form a connected receiving cavity that includes two functional areas. One functional area is the part inside the first housing 24 made of insulating material, which is used to house the power supply 21 and the charging coil 23 and other structures. The other functional area is the part inside the second housing 12 made of metal material, which is used to house the controller 11 and other structures. The two functional areas are connected to each other or separated from each other by a sealing structure. When a sealing structure is provided between the two functional areas, a connection port for wires or other conductive structures to pass through needs to be left to ensure that the charging coil 23 and the power supply 21 can achieve an electrical connection with the controller 11 through internal wiring.

[0040] Continue to refer to Figure 4 As shown, the first housing 24 includes a metal ring 241 for welding connection with the second housing 12. The body of the first housing 24 is made of insulating material. The metal ring 241 can be fixedly connected to the body of the first housing 24 by means of brazing or plating at its opening, that is, at the edge of the housing facing the second housing 12.

[0041] Furthermore, based on the aforementioned metal ring 241, it can serve as a connecting bridge between the first housing 24 made of insulating material and the second housing 12 made of metal material, thereby facilitating a reliable sealed connection between the first housing 24 and the second housing 12. The specific connection method can be welding or bonding, which can achieve both connection and fixation and reliable sealing at the connection.

[0042] In some embodiments, the second housing 12 is misaligned with the charging coil 23 in the axial direction of the charging coil 23. That is, when the charging coil 23 is working, the magnetic field used to charge the power supply 21 will not interfere with the controller 11 inside the second housing 12.

[0043] Furthermore, based on the aforementioned positional relationship between the battery section 2 and the main body section 1, the magnetic field of the charging coil 23 can be prevented from affecting the operation of the controller 11, and they are relatively independent of each other, thereby improving the reliability of the peripheral nerve electrical stimulation device.

[0044] In some embodiments, the peripheral nerve electrical stimulation device further includes a power supply bracket 41; the power supply bracket 41 is an annular bracket sleeved on the outside of the power supply 21, and the power supply bracket 41 is made of insulating material, specifically ABS, PC, Peek, etc. The power supply 21 and the charging coil 23 are both disposed on the power supply bracket 41, and the power supply bracket 41 is provided with winding posts for the charging coil 23 to be wound. It should be understood that there can be at least three winding posts, which are arranged on the annular surface of the power supply bracket 41. The winding post can also be a columnar structure coaxially arranged with the power supply bracket 41, as long as it can provide reliable winding support for the charging coil 23. The covering film 22 is filled between the power supply bracket 41 and the power supply 21.

[0045] Furthermore, the power support 41, made of the aforementioned insulating material, can provide a reliable support structure for the charging coil 23 and the power supply 21, while also avoiding interference with the wireless charging of the peripheral nerve electrical stimulation device.

[0046] Continue to refer to Figure 2 and Figure 3 As shown, the charging coil 23 is disposed on one side of the power supply bracket 41, and the other side of the power supply bracket 41 is provided with a wireless communication antenna 25 electrically connected to the controller 11. The shape of the wireless communication antenna 25 matches that of the power supply bracket 41.

[0047] Furthermore, based on the charging coil 23 and wireless communication antenna 25 being arranged on both sides of the ring-shaped power support 41, the charging coil 23 and wireless communication antenna 25 are stacked. The wireless communication antenna 25 can be laser-etched on the power support 41 using laser direct forming (LDS) technology, or it can be a metal antenna device separate from the power support 41. Specifically, the wireless communication antenna 25 can be made of a material with good conductivity, such as copper, platinum-iridium alloy, nickel, etc., and its shape can be sheet-like or wire-like. The wireless communication antenna 25 can cover the other side of the power support 41 used to install the charging coil 23.

[0048] In some embodiments, wireless charging can be performed using magnetic induction, and the wireless communication antenna 25 can use radio frequency communication, such as Bluetooth or 5G. It should be noted that the wireless communication antenna 25 and the charging coil 23 use different frequencies to reduce interference between them.

[0049] In some embodiments, the peripheral nerve electrical stimulation device further includes a controller bracket 42. The controller 11 includes one or more stacked circuit boards. The controller bracket 42 includes a fixing structure for fixing the circuit boards. The controller bracket 42 can fix the circuit boards by bolts, clips, or other structures. Each layer of the controller bracket 42 can fix two circuit boards on its two sides respectively. The same circuit board can be fixed between two adjacent layers of the controller bracket 42, or two circuit boards can be fixed between them. The two circuit boards are respectively connected to two controller brackets 42. Furthermore, the controller bracket 42 can be a ring-shaped bracket structure or a plate-shaped structure, as long as it can provide a reliable and stable support effect for the circuit boards.

[0050] Furthermore, the controller bracket 42 enables multi-layer stacking of circuit boards, thereby reducing the space occupied by the controller 11, effectively reducing the size of the peripheral nerve electrical stimulation device, and thus improving the flexibility of the peripheral nerve electrical stimulation device. At the same time, this stacking arrangement facilitates installation and production, and ensures that internal components and their interconnections are not damaged when subjected to vibration or external impact.

[0051] In some further embodiments, the controller bracket 42 is connected to the power supply bracket 41 to form an integrated bracket structure. The controller bracket 42 and the power supply bracket 41 can be connected by a connection structure or can be integrally formed.

[0052] Furthermore, based on the aforementioned support structure, the internal structures of the first housing 24 and the second housing 12 can be connected, improving the overall integrity of the peripheral nerve electrical stimulation device. At the same time, after fixing the power supply 21, charging coil 23, wireless communication antenna 25, and controller 11, it is convenient to connect the electrical connection structures between them. Specifically, the power supply 21 can be directly connected to the circuit board fixed on the controller support 42 through fixed electrode plates, and the connection stability between the battery part 2 and the main body part 1 can be further enhanced by using electrode plates.

[0053] In some embodiments, the stimulation part 3 includes a stimulation electrode 31, a third housing 32, and a fixing component. The third housing 32 is made of insulating material. One end of the stimulation electrode 31 is inserted into the third housing 32 and electrically connected to the main body 1, while the other end contacts the tissue and is used to achieve electrical stimulation. The stimulation electrode 31 is detachably connected to the third housing 32 through the fixing component. The stimulation electrode 31 can be a metal conductor, with one end inserted into the third housing 32 and fixed with the fixing component, and the other end exposed outside the third housing 32. Specifically, it can be recessed into the through hole on the outer surface of the third housing 32, so that the stimulation end of the stimulation electrode 31 can be protected by the third housing 32. The stimulation electrode 31 can also be flush with or extend beyond the outer surface of the third housing 32.

[0054] In some further embodiments, the stimulation part 3 further includes at least one electrical connection part arranged on the stimulation electrode 31. Each electrical connection part is fitted with an annular conductive sheet 33 that is electrically connected to the main body part 1. Each annular conductive sheet 33 is connected to the controller 11, thereby realizing multiple control modes of the stimulation electrode 31. Continuing to refer to... Figure 6 As shown, both stimulation electrodes 31 have the same number of electrical connection parts as the conductive sheets. For example, each stimulation electrode 31 includes four electrical connection parts a1, a2, a3, and a4 for electrical connection to the four annular conductive sheets 33 respectively, and also includes four electrical stimulation parts A1, A2, A3, and A4 corresponding to the four electrical connection parts a1, a2, a3, and a4. It should be understood that on the same stimulation electrode 31, a1 is electrically connected to A1, a2 is electrically connected to A2, a3 is electrically connected to A3, and a4 is electrically connected to A4. Thus, different electrical stimulation modes can be achieved by different power supply methods to the four electrical connection parts a1, a2, a3, and a4. The stimulation electrode 31 can also be provided with two, three, five, or more electrical connection parts, which can be set according to actual needs.

[0055] Furthermore, based on the aforementioned arrangement of the annular conductive sheet 33, multiple control modes of the stimulation electrode 31 can be realized, thereby enriching the functions of the peripheral nerve electrical stimulation device and improving its applicability.

[0056] In some embodiments, an insulating gasket 34 is provided between every two adjacent annular conductive sheets 33. The insulating gasket 34 has an annular structure. It should be understood that the annular conductive sheets 33 and the insulating gasket 34 are alternately sleeved on the cylindrical stimulation electrode 31. While the insulating gasket 34 provides insulation and isolation between the two adjacent annular conductive sheets 33, the inner side of the insulating gasket 34 is sealed to the stimulation electrode 31, and the outer side is sealed to the inner wall of the third housing 32, thereby achieving a multi-seal structure.

[0057] Furthermore, the number of insulating pads 34 is one more than the number of annular conductive sheets 33. That is, the two insulating pads 34 are close to the two ends of the stimulation electrode 31, and the annular conductive sheets 33 and insulating pads 34 are arranged alternately between the two insulating pads 34.

[0058] In some embodiments, the third housing 32 has a cylindrical receiving space inside, the stimulation electrode 31 is coaxially arranged with the cylindrical receiving space, the outer periphery of the insulating gasket 34 is sealed to the inner wall of the cylindrical receiving space, and the fixing assembly includes a fixing sleeve 35, a fixing screw 36 and a sealing cap 37. The fixing sleeve 35 is sleeved on the outside of the stimulation electrode 31, and the fixing sleeve 35 has a threaded hole extending radially thereon. The fixing screw 36 is threadedly connected to the threaded hole. The sealing cap 37 is installed on the third housing 32 and is located at a position opposite to the threaded hole. The sealing cap 37 can be specifically glued and fixed to the third housing 32, or it can be tightly connected. The connection is made in a similar manner. The sealing cover 37 has a cavity that can accommodate the fully unscrewed fixing screw 36. The fixing sleeve 35 is located between the stimulation end of the stimulation electrode 31 that extends out of the third housing 32 and the insulating gasket 34. By turning the fixing screw 36, the side of the stimulation electrode 31 inside the fixing sleeve 35 is squeezed or released, thereby fixing or releasing the stimulation electrode 31. It should be understood that an opening is provided on the third housing 32 at the position corresponding to the fixing screw 36, and the third housing 32 is provided with a sealing cover 37 for sealing the fixing screw 36, further improving the sealing effect of the entire stimulation part 3.

[0059] Furthermore, the end of the fixing sleeve 35 facing the insulating pad 34 has a snap-fit ​​groove that matches the insulating pad 34, so as to achieve coaxial snap-fit ​​between the two. The end of the fixing sleeve 35 facing the stimulation end of the stimulation electrode 31 has a chamfer and other structures that match the inner wall of the third housing 32, so as to achieve stable and reliable fixing of the fixing sleeve 35 inside the third housing 32.

[0060] Continue to refer to Figure 1 and Figure 4 As shown, the controller 11 and the stimulation part 3 are connected by a deformable connecting wire 5. The connection between the connecting wire 5 and the main body 1 and the connection between the connecting wire 5 and the stimulation part 3 are provided with a sealing structure. The connecting wire 5 is covered with a sealing layer, which is a flexible insulating material. The connecting wire 5 can be designed as a spiral soft wire. The outer sealing layer can be silicone or other soft elastic material, which can be bent at a large angle and stretched appropriately. The specific material of the connecting wire 5 can be platinum-iridium alloy, silver, stainless steel, etc.

[0061] Furthermore, based on the aforementioned connection wire 5, the overall length of the rigid part of the peripheral nerve electrical stimulation device can be optimized, breaking down the long rigid part into two relatively short parts that can change relative position or angle, making it suitable for flexible implantation sites of peripheral nerves, especially mobile areas such as the limbs.

[0062] Specifically, the number of stimulation parts 3 and connecting wires 5 are two or more, and they are set one-to-one with each other, so as to realize multi-point stimulation.

[0063] Furthermore, the main body 1 is connected to the connecting wire 5 through the feed passage 6. The feed passage 6 can be covered with an insulating shell, which is sealed to the second shell 12. At the same time, the insulating shell is provided with a connection hole that seals with the connecting wire 5.

[0064] Continue to refer to Figure 7 As shown, in some embodiments, the peripheral nerve electrical stimulation device may perform the following steps during stimulation: S1, in a dormant state; S2. Magnetic induction detection: Is there a sufficiently strong magnetic field? If not, continue to sleep. If yes, proceed to step S3. S3. The controller 11 is woken up and starts wireless communication signal detection. If a wireless communication signal is detected, step S4 is executed. If no signal is detected, step S3 is executed again. S4. Establish a wireless communication channel using wireless communication antenna 25; S5, Controller 11 receives a control command, which includes stimulation parameters such as stimulation frequency, pulse width, current amplitude, stimulation duration, stimulation interval, and treatment duration; S6, Controller 11 processes the received stimulus parameters; S7. Control the stimulation electrode 31 to generate a corresponding stimulation electric field; S8. Enter a dormant state after completing treatment.

[0065] Continue to refer to Figure 8 As shown, in some embodiments, the peripheral nerve electrical stimulation device may perform the following steps during wireless charging: S10, in a dormant state; S20. Magnetic induction detection: Is there a magnetic field from the wireless charger? If not, continue to sleep. If yes, proceed to step S30. S30, Controller 11 is awakened; S40. Does the charging coil 23 receive a charging magnetic field? If not, repeat step S40; if yes, execute step S50. S50. Establish a wireless communication channel using wireless communication antenna 25; S60. Verify the validity of the charger. If valid, continue charging. If invalid, repeat step S60. S70 and controller 11 detect whether power supply 21 is fully charged during the charging process. If it is not fully charged, charging continues; if it is fully charged, the charger is notified to stop charging.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An implantable peripheral nerve electrical stimulation device, characterized in that, include: The main body (1), battery (2) and stimulation (3) are provided; the main body (1) is provided with a controller (11), the battery (2) includes a power source (21), a coating film (22), a charging coil (23) and a first housing (24), the charging coil (23) is sleeved on the outside of the power source (21), the coating film (22) is a flexible permanent magnet material and is wrapped on the outer surface of the power source (21) to form the magnetic core of the charging coil (23), the power source (21) and the charging coil (23) are both provided in the first housing (24), the first housing (24) is sealed to the main body (1), and the first housing (24) is an insulating material; The power supply (21), the charging coil (23) and the stimulation part (3) are all electrically connected to the controller (11).

2. The implantable peripheral nerve electrical stimulation device according to claim 1, characterized in that, The main body (1) includes a second housing (12), which is made of metal and covers the outside of the controller (11). The first housing (24) and the second housing (12) are sealed together and form a communicating cavity between them.

3. The implantable peripheral nerve electrical stimulation device according to claim 2, characterized in that, The second housing (12) is misaligned with the charging coil (23) along the axial direction of the charging coil (23).

4. The implantable peripheral nerve electrical stimulation device according to claim 1, characterized in that, The peripheral nerve electrical stimulation device also includes a power supply bracket (41). The power supply bracket (41) is an annular bracket sleeved on the outside of the power supply (21). The power supply bracket (41) is made of insulating material. The power supply (21) and the charging coil (23) are both mounted on the power supply bracket (41). The power supply bracket (41) is provided with a winding post for the charging coil (23) to be wound. The covering film (22) is filled between the power supply bracket (41) and the power supply (21).

5. The implantable peripheral nerve electrical stimulation device according to claim 4, characterized in that, The charging coil (23) is disposed on one side of the power supply bracket (41), and the other side of the power supply bracket (41) is provided with a wireless communication antenna (25) electrically connected to the controller (11). The shape of the wireless communication antenna (25) matches that of the power supply bracket (41).

6. The implantable peripheral nerve electrical stimulation device according to claim 4, characterized in that, The peripheral nerve electrical stimulation device also includes a controller bracket (42), the controller (11) includes one or more stacked circuit boards, the controller bracket (42) includes a fixing structure for fixing the circuit boards, the controller bracket (42) is connected to the power supply bracket (41) and forms an integrated bracket structure.

7. The implantable peripheral nerve electrical stimulation device according to claim 1, characterized in that, The stimulation part (3) includes a stimulation electrode (31), a third housing (32) and a fixing component. The third housing (32) is made of insulating material. One end of the stimulation electrode (31) is inserted into the third housing (32) and electrically connected to the main body (1). The other end contacts the tissue and is used to achieve electrical stimulation. The stimulation electrode (31) is detachably connected to the third housing (32) through the fixing component.

8. The implantable peripheral nerve electrical stimulation device according to claim 7, characterized in that, The stimulation part (3) further includes at least one electrical connection part arranged on the stimulation electrode (31), and each electrical connection part is fitted with an annular conductive sheet (33) that is electrically connected to the main body part (1).

9. The implantable peripheral nerve electrical stimulation device according to claim 8, characterized in that, The fixing assembly includes a fixing sleeve (35), a fixing screw (36), and a sealing cap (37). The fixing sleeve (35) is sleeved on the outside of the stimulation electrode (31), and the fixing sleeve (35) has a threaded hole extending radially thereon. The fixing screw (36) is threadedly connected to the threaded hole. The sealing cap (37) is installed on the third housing (32) and is located opposite to the threaded hole. The sealing cap (37) has a cavity inside that can accommodate the fixing screw (36) that has been completely unscrewed.

10. The implantable peripheral nerve electrical stimulation device according to any one of claims 1 to 9, characterized in that, The controller (11) and the stimulation part (3) are connected by a deformable connecting wire (5). The connection between the connecting wire (5) and the main body (1) and the connection between the connecting wire (5) and the stimulation part (3) are provided with a sealing structure. The outside of the connecting wire (5) is covered with a sealing layer, which is a flexible insulating material.

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