Wireless power supply device based on Maxwell displacement electric field and implantable medical system

Abstract

The utility model belongs to the field of medical instruments, and particularly relates to a wireless power supply device based on a Maxwell displacement electric field and an implantable medical system. The wireless power supply device is used for wirelessly supplying power to an electronic device implanted in the body of a user and comprises an energy receiver, an energy transmitter and a wearable assembly. The energy receiver comprises an induction piece, an electric energy converter and a protective layer. And the electric energy converter is used for rectifying, filtering and transforming the output at the two ends of the electrode. The wearing assembly comprises a storage bag and a flexible bandage. The storage bag accommodates the energy emitter, and the flexible bandage fixes the energy emitter on a specified part of a user body; therefore, when the energy emitter operates, a Maxwell displacement electric field with specified intensity and space distribution can be generated at the induction piece, and then an electric signal meeting the power supply requirement is excited on the induction piece. According to the utility model, the problem of insufficient reliability and safety existing in the wireless charging scheme of the existing in-vivo implanted device is solved.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, specifically relating to a wireless power supply device and an implantable medical system based on Maxwell's displacement electric field. Background Technology

[0002] Implantable medical electronic devices, such as pacemakers, cochlear implants, and glucose biosensors, provide protection for the health and lives of specific populations. However, ensuring the power supply for these devices throughout their entire lifespan is a pressing technical challenge that needs to be addressed by those skilled in the art.

[0003] Currently, most implantable medical electronic devices are powered by their own power sources. Due to limitations such as the size of the implanted devices, the capacity of these batteries is relatively small, resulting in a limited lifespan. To improve the lifespan of implantable medical electronic devices, some engineers have proposed a solution using wireless power supply. This solution can avoid secondary surgeries required for battery replacement, reducing patient suffering. However, traditional wireless power supply technology generally uses the principle of electromagnetic induction. Limited by the inability to implant large coils within the human body, the wireless power transmission distance and efficiency using this technology need further improvement, and the stability of the power supply is insufficient. Furthermore, the thermal effects during charging may cause secondary harm to the human body. Utility Model Content

[0004] To address the reliability and safety issues of wireless charging solutions for implantable devices based on electromagnetic induction, this invention provides a wireless power supply device and implantable medical system based on Maxwell's displacement electric field.

[0005] The technical solution provided by this utility model is as follows:

[0006] A wireless power supply device based on Maxwell's displacement electric field is disclosed, which is used to wirelessly power electronic devices implanted in the user's body. This wireless power supply device includes an energy receiver, an energy transmitter, and a wearable component.

[0007] The energy receiver includes a sensor, a power converter connected to both ends of the sensor, and a protective layer enclosing the sensor and the power converter. The power converter rectifies, filters, and transforms the output from the electrodes to power electronic devices implanted in the user's body. The energy transmitter employs a device capable of generating a Maxwell displacement electric field under the drive of an external power source or human movement.

[0008] The wearable component includes a storage bag and flexible straps for securing the storage bag to a designated location on the user's body. The wearable component is used to house an energy transmitter via the storage bag and to secure the energy transmitter to a designated part of the user's body via the flexible straps; this allows the energy transmitter to generate a Maxwell displacement electric field of a specified intensity and spatial distribution at a sensor during operation, thereby exciting an electrical signal on the sensor that meets the power supply requirements through the Maxwell displacement electric field.

[0009] As a further improvement of this utility model, the energy emitter adopts a piezoelectric thin film array, a triboelectric power generation device, or an electrostatic ion ball.

[0010] The piezoelectric thin film array is composed of multiple micro piezoelectric sensor units arranged in an array; when each piezoelectric sensor unit is subjected to compressive stress, the charge distribution on its surface changes, thereby generating the required Maxwell displacement electric field.

[0011] The triboelectric generator includes at least two thin films with different electronegativity; the two thin films come into contact and separate under the action of external force, causing a change in the charge distribution on the surface, thereby generating the required Maxwell displacement electric field.

[0012] The electrostatic ion sphere is driven by an external power source to change the surface charge distribution, thereby generating the required Maxwell displacement electric field.

[0013] As a further improvement of this utility model, the triboelectric power generation device includes a flexible carrier, a dielectric film, and a metal film; the carrier is box-shaped and includes a closed cavity inside; the dielectric film is located in the center of the cavity.

[0014] As a further improvement of this utility model, the carrier is made of silicone, rubber or elastomer material.

[0015] The dielectric film is made of polypropylene, polyvinylidene fluoride, vinylidene chloride acrylonitrile copolymer, polytetrafluoroethylene, polyvinyl chloride, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, polychloroprene, polyimide, aniline formaldehyde resin, polyoxymethylene, polyethylene adipate or diallyl phthalate.

[0016] As a further improvement of this utility model, the sensing element is composed of any one or more electronic components such as conductors, semiconductors, diodes, voltage regulator chips, PN junction devices, NPN transistors, PNP transistors, and Zener transistors.

[0017] As a further improvement of this invention, the storage bag and flexible strap in the wearable component adopt an integrated structure or a detachable separate structure. The strap secures the storage bag by being tied to the user's torso or limbs; the ends of the straps are provided with Velcro for mutual fastening.

[0018] As a further improvement of this utility model, the protective layer in the energy receiver is made of medical polymer materials, natural polymer materials or inorganic materials that meet biocompatibility requirements.

[0019] This invention also includes an implantable medical system comprising a medical electronic device body and a wireless power supply device based on Maxwell's displacement electric field, as described above. The energy receiver in the wireless power supply device is implanted into the human body along with the medical electronic device body; and the output port of the power converter is electrically connected to the power supply port of the medical electronic device body. The medical electronic device body in this invention includes a pacemaker, a cochlear implant, and a glucose biosensor.

[0020] As a further improvement of this utility model, the implantable medical system also includes a rechargeable battery; the output port of the power converter is electrically connected to the charging port of the rechargeable battery; the rechargeable battery is used to power the medical electronic device body.

[0021] The technical solution provided by this utility model has the following beneficial effects:

[0022] This invention provides a wireless power supply device comprising an energy receiver, an energy transmitter, and wearable components. This device utilizes Maxwell's displacement electric field to achieve wireless power transmission, thus enabling safer and more reliable penetration of human tissue to provide wireless power to implanted medical electronic devices. Compared to existing wireless power transmission methods based on electromagnetic induction, the solution provided by this invention offers higher reliability. This solution utilizes a smaller implanted sensor for energy reception, resulting in higher safety and greater practical value. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is an application state diagram of the wireless power supply device provided in Embodiment 1 of this utility model.

[0025] Figure 2 This is an application state diagram of the energy receiver in the wireless power supply device provided in Embodiment 1 of this utility model.

[0026] Figure 3 This is a functional schematic diagram of the energy receiver in Embodiment 1 of this utility model.

[0027] Figure 4This is a schematic diagram of the structure of the triboelectric power generation device-type energy transmitter used in Embodiment 1 of this utility model.

[0028] The diagram is marked as follows:

[0029] 1. Energy receiver; 2. Energy transmitter; 3. Wearable component; 11. Sensor; 12. Power converter; 13. Protective layer; 21. Carrier; 22. Dielectric film; 31. Storage bag; 32. Strap; 100. Medical electronic device; 121. Rectifier circuit; 122. Voltage regulator circuit; 123. Boost circuit. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0031] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are only used to distinguish different objects described, and should not be construed as indicating or implying relative importance.

[0032] Example 1

[0033] This embodiment provides a wireless power supply device based on Maxwell's displacement electric field, which is used to wirelessly power electronic devices implanted in a user's body. Figure 1 As shown, the wireless power supply device provided in this embodiment includes: an energy receiver 1, an energy transmitter 2, and a wearable component 3.

[0034] Among them, such as Figure 2As shown, the energy receiver 1 includes a sensor 11, a power converter 12 connected to both ends of the sensor 11, and a protective layer 13 enclosing the sensor 11 and the power converter 12. The power converter 12 is used to rectify, filter, and transform the output from both ends of the electrodes to power the electronic device implanted in the user's body. To prevent the current output from the sensor 11 in the implantable energy receiver 1 from damaging human tissue, this embodiment encloses both the sensor 11 and the power converter 12 within a sealed protective layer 13. The protective layer 13 in the energy receiver is made of a biocompatible medical polymer material, natural polymer material, or inorganic material. Specifically, in practical applications, the protective layer 13 can simultaneously cover both the sensor 11 and the power converter 12, or it can be... Figure 3 As shown, the two are coated separately. The protective layer 13 can be made of materials such as silicone rubber, polyetherurethane elastomer, polyacrylic acid, polycarbonate, ultra-high molecular weight polyethylene, polysilicon, and biomedical ceramics.

[0035] In practical applications, the sensing element 11 in the energy receiver 1 can be any one of the following electronic components: conductor, semiconductor, diode, voltage regulator chip, PN junction device, NPN transistor, PNP transistor, Zener transistor, etc., or a sensing circuit composed of any combination of these components. Preferably, the sensing element 11 is a metal electrode.

[0036] The energy emitter 2 employs a device capable of generating a Maxwell displacement electric field under the drive of an external power source or human movement. In practical applications, the energy emitter 2 can utilize a piezoelectric thin film array, a triboelectric generator, or an electrostatic ion sphere. The piezoelectric thin film array consists of multiple miniature piezoelectric sensor units arranged in an array; when each piezoelectric sensor unit is subjected to compressive stress, the charge distribution on its surface changes, thereby generating the desired Maxwell displacement electric field. The triboelectric generator includes at least one dielectric thin film; the node film contacts or rubs against other components under external force, causing a change in the charge distribution on its surface, thereby generating the desired Maxwell displacement electric field. The electrostatic ion sphere, driven by an external power source, undergoes a change in surface charge distribution, thereby generating the desired Maxwell displacement electric field.

[0037] The wearable component 3 includes a storage bag 31 and a flexible strap for securing the storage bag 31 to a designated location on the user's body. The wireless power supply device provided in this embodiment generates the required Maxwell displacement electric field around the energy receiver 1 via the energy transmitter 2, thereby causing the two ends of the sensor 11 located within the Maxwell displacement electric field to output the required electrical energy. The distribution of the Maxwell displacement electric field around the energy transmitter 2 changes with position. To ensure that the Maxwell displacement electric field generated by the energy transmitter 2 always completely covers the sensor 11 in the energy receiver 1 and that the two ends of the sensor 11 stably output electrical energy to meet the power supply requirements, this embodiment uses the wearable component 3 to fix the energy transmitter 2 at the position closest to the implanted energy receiver 1 in the human body.

[0038] Specifically, in this embodiment, the wearable component 3 of the wireless power supply device is used to house the energy transmitter 2 via a storage bag 31 and to fix the energy transmitter 2 to a designated part of the user's body via a flexible strap. This allows the energy transmitter 2 to generate a Maxwell displacement electric field of a specified intensity and spatial distribution at the sensor 11 during operation, thereby exciting an electrical signal on the sensor 11 that meets the power supply requirements through the Maxwell displacement electric field.

[0039] In practical applications, the storage bag 31 and flexible strap in the wearable component 3 of this embodiment can be an integrated structure or a detachable separate structure. The strap 32 secures the storage bag 31 by binding it to the user's torso or limbs; the ends of the strap 32 are provided with Velcro for mutual fastening. The strap 32 can be made of various skin-friendly fabric materials, and the raw materials of the fabric can be natural fibers or synthetic fibers.

[0040] The wireless power supply device provided in this embodiment is based on Maxwell's displacement electric field to achieve wireless power transmission. When objects rub against each other, the charges on them are redistributed, thereby generating a corresponding electric field. When the friction stops, an electrostatic field is generated, which can last for a period of time. However, as long as friction continues, a constantly changing electric field will be generated, which is the Maxwell's displacement electric field. Of course, in addition to the mutual friction of materials, the Maxwell's displacement electric field can also be generated in other ways, such as the Maxwell's displacement electric field generation method based on piezoelectric thin films and electrostatic ion spheres. Maxwell's theory proposes that changing electric fields and changing magnetic fields are not isolated from each other, but closely related, mutually exciting, and forming a unified electromagnetic field. In this constantly changing electric field of Maxwell's displacement electric field, the energy potential at each point is different. As long as a conductor is placed in the Maxwell's displacement electric field, due to the existence of energy difference, there will be a potential difference between different positions of the conductor, and a corresponding current will be generated. Therefore, by generating a required Maxwell's electric field around a conductor, electrical energy can be output at both ends of the conductor, thereby realizing wireless power transmission. For example, the sensor 11 in the energy receiver 1 of the wireless power supply device provided in this embodiment is a conductor implanted in the human body, and the energy transmitter 2, which is fixed outside the human body by the wearable component 3, is a device for generating the required Maxwell displacement electric field. When the energy transmitter 2 is driven by the power supply or driven by the squeezing, swaying or other actions during the human body's movement, the charge on it will be redistributed, thereby generating a Maxwell displacement electric field that enables the sensor 11 to output electrical energy.

[0041] Specifically, such as Figure 3 As shown, the power converter 12 of the energy receiver 1 in this embodiment includes a rectifier, a voltage regulator circuit 122, and a boost circuit 123. The rectifier circuit 121 uses a rectifier bridge composed of four diodes. The two output terminals of the inductor 11 are connected to the input terminals of the rectifier circuit 121, and the output of the rectifier circuit 121 is electrically connected to the input terminal of the voltage regulator circuit 122. The voltage regulator circuit 122 uses a circuit composed of one diode, one inductor, and one capacitor; the output of the voltage regulator circuit 122 is electrically connected to the input terminal of the boost circuit 123, and the output of the boost circuit 123 is electrically connected to the power supply port of the implantable medical electronic device 100.

[0042] Typically, in practical applications, a flexible PVDF piezoelectric film can be selected as the required energy emitter 2. PVDF piezoelectric film is a material with excellent piezoelectric properties, which can generate charges of opposite polarity when subjected to external force. Figure 4A typical energy emitter 2 based on a triboelectric power generation device is shown. As seen in the figure, the triboelectric power generation device includes a flexible carrier 21 and a dielectric film 22. The carrier 21 is box-shaped, containing a closed cavity; the dielectric film 22 is located in the center of the cavity. When the triboelectric power generation device is subjected to pressure, the carrier 21 deforms, causing the dielectric film 22 to contact or rub against the upper or lower wall of the carrier 21. When the external force is removed, the flexible carrier 21 material recovers its deformation, causing the dielectric film 22 to detach from the outer wall of the carrier 21. Due to the electronegativity difference between the dielectric film 22 and the carrier material 23, the contact-separation cycle between them causes a redistribution of charge on the surface of the dielectric film 22, thereby generating the desired Maxwell displacement electric field.

[0043] In practical applications, Figure 4 The carrier 21 in the energy transmitter 2 shown is made of silicone, rubber, or elastomer material. These materials have good resilience and can withstand long-term deformation and recovery cycles without fatigue. The dielectric film 22 in the energy transmitter 2 can be made of polypropylene, polyvinylidene fluoride, vinylidene chloride acrylonitrile copolymer, polytetrafluoroethylene, polyvinyl chloride, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, polychloroprene, polyimide, aniline-formaldehyde resin, polyoxymethylene, polyethylene adipate, or diallyl phthalate. In practical applications, technicians can flexibly select different combinations of carrier 21 and dielectric film 22 materials according to actual needs to achieve better power supply performance.

[0044] Example 2

[0045] Based on the scheme of Embodiment 1, this embodiment further provides an implantable medical system, which includes a medical electronic device 100 body and a wireless power supply device based on Maxwell's displacement electric field as in Embodiment 1. The energy receiver 1 in the wireless power supply device is implanted into the human body together with the medical electronic device 100 body; and the output port of the power converter 12 is electrically connected to the power supply port of the medical electronic device 100 body. In this embodiment, the medical electronic device 100 body includes various implantable medical electronic devices 100 such as pacemakers, cochlear implants, and glucose biosensors.

[0046] In a more optimized embodiment, the implantable medical system further includes a rechargeable battery; the output port of the power converter 12 is electrically connected to the charging port of the rechargeable battery; the rechargeable battery powers the medical electronic device 100. In this embodiment, the rechargeable battery directly powers the medical electronic device 100, while the aforementioned wireless power supply device only serves as a charging source for the rechargeable battery. In this case, the rechargeable battery acts as an energy storage tank. Fluctuations in the output of the wireless power supply device do not affect the normal operation of the medical electronic device 100. Even if the wireless power supply device fails to generate power output normally for a short period, the medical electronic device 100 can still continue to operate for a period using the remaining power in the rechargeable battery, providing a window of opportunity for emergency treatment. Of course, unlike traditional solutions that rely solely on battery power, the rechargeable battery in this embodiment can continuously receive power output from the wireless power supply device. Therefore, its actual lifespan can cover the entire lifespan of the implantable medical electronic device 100, thereby avoiding the risk of needing surgical replacement due to insufficient power.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A wireless power supply device based on Maxwell's displacement electric field, used to wirelessly power electronic devices implanted in a user's body, characterized in that, It includes: An energy receiver includes a sensor, an energy converter connected to both ends of the sensor, and a protective layer enclosing the sensor and the energy converter. The power converter is used to rectify, filter and transform the output at both ends of the electrodes, and then use it to power the electronic devices implanted in the user's body. An energy transmitter that employs a device capable of generating a Maxwell displacement electric field under the drive of an external power source or human movement; A wearable assembly includes a storage bag and a flexible strap for securing the storage bag to a designated location on a user's body. The wearable assembly is used to house the energy transmitter through the storage bag and to secure the energy transmitter to a designated location on the user's body through the flexible strap. This allows the energy transmitter to generate a Maxwell displacement electric field of a specified intensity and spatial distribution at the sensor during operation, thereby exciting an electrical signal on the sensor that meets the power supply requirements through the Maxwell displacement electric field.

2. The wireless power supply device based on Maxwell's displacement electric field as described in claim 1, characterized in that: The energy emitter is a piezoelectric thin film array, a triboelectric generator, or an electrostatic ion ball. The piezoelectric thin film array is composed of multiple micro piezoelectric sensor units arranged in an array; when each piezoelectric sensor unit is subjected to compressive stress, the charge distribution on its surface changes, thereby generating the required Maxwell displacement electric field; The triboelectric power generation device includes at least one dielectric film; the dielectric film rubs against other components under the action of external force to cause a change in the charge distribution on its surface, thereby generating the required Maxwell displacement electric field. The electrostatic ion sphere is driven by an external power source to change the surface charge distribution, thereby generating the required Maxwell displacement electric field.

3. The wireless power supply device based on Maxwell's displacement electric field as described in claim 2, characterized in that: The triboelectric power generation device includes a flexible carrier and a dielectric film; the carrier is box-shaped and includes a closed cavity; the dielectric film is located in the center of the cavity.

4. The wireless power supply device based on Maxwell's displacement electric field as described in claim 3, characterized in that: The carrier is made of silicone, rubber or elastomer material; The dielectric film is made of polypropylene, polyvinylidene fluoride, vinylidene chloride acrylonitrile copolymer, polytetrafluoroethylene, polyvinyl chloride, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, polychloroprene, polyimide, aniline formaldehyde resin, polyoxymethylene, polyethylene adipate or diallyl phthalate.

5. The wireless power supply device based on Maxwell's displacement electric field as described in claim 1, characterized in that: The sensing element is composed of any one or more electronic components such as conductors, semiconductors, diodes, voltage regulator chips, PN junction devices, NPN transistors, PNP transistors, and Zener transistors.

6. The wireless power supply device based on Maxwell's displacement electric field as described in claim 5, characterized in that: The storage bag and flexible strap in the wearable component adopt an integrated structure or a detachable split structure. The flexible straps secure the storage bag by being tied to the user's torso or limbs; the ends of the flexible straps are provided with Velcro for mutual fastening.

7. The wireless power supply device based on Maxwell's displacement electric field as described in claim 1, characterized in that: The protective layer in the energy receiver is made of medical polymer materials, natural polymer materials or inorganic materials that meet biocompatibility requirements.

8. An implantable medical system comprising a medical electronic device body, characterized in that: It also includes a wireless power supply device based on Maxwell displacement electric field as described in any one of claims 1-7; the energy receiver in the wireless power supply device is implanted in the human body together with the medical electronic device body; and the output port of the power converter is electrically connected to the power supply port of the medical electronic device body.

9. The implantable medical system as described in claim 8, characterized in that: The medical electronic device body includes a pacemaker, a cochlear implant, and a glucose biosensor.

10. The implantable medical system as described in claim 9, characterized in that: It also includes a rechargeable battery; the output port of the power converter is electrically connected to the charging port of the rechargeable battery; the rechargeable battery is used to power the medical electronic device body.

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