CN218739887U - An implantable pacemaker using temperature difference to generate electricity - Google Patents

Abstract

The utility model relates to an implanted pacemaker which utilizes temperature difference to generate electricity, belongs to the technical field of medical equipment, and comprises a plug-in body, a casing, a communication piece, a heat-conducting piece and a circuit board. The housing accommodates communication parts, heat conduction parts and circuit boards, and has protrusions and depressions on the front and rear surfaces to increase the contact area with human tissue and increase the temperature difference between the front and rear surfaces. The casing includes a shielding layer, a pyroelectric layer and an electric storage layer sequentially from outside to inside. The thermoelectric layer is fixedly connected and insulated with the shielding layer, and can generate electricity by using the temperature difference to supply power and charge for the pacemaker, thereby improving the service life; The power supply of the device also reduces the mass and saves space. The heat conduction member passes through the circuit board, abuts and adheres to the inner surface of the housing at the raised part on the front and rear sides, passes through the electric storage layer, abuts and adheres to the thermoelectric layer, and can conduct heat, which is convenient The thermoelectric layer uses temperature difference to generate electricity to improve power generation and efficiency.

Description

An implantable pacemaker using temperature difference to generate electricity

technical field

The utility model relates to a pacemaker, in particular to an implanted pacemaker, which belongs to the technical field of medical instruments.

Background technique

Implantable pacemakers need to be implanted under the skin through surgery, and the most common types are heart pacemakers and brain pacemakers. A pacemaker contains circuits and batteries encapsulated in a closed case, and is the core device of the pacing system; the pacing system also includes electrode leads and a programmer.

Implantable pacemakers need batteries to provide electrical energy to generate electrical pulses, and have a certain lifespan; their replacement requires surgical operations, which increases the suffering of patients, is risky, and costs high. In order to improve lifespan and supplement energy, various technical solutions have appeared at present. For example, the utility model patent with application number 201820277430.1 discloses a new type of cardiac pacemaker that can be charged non-invasively, including a pacemaker and a wireless charging device. The pacemaker includes a housing, a microprocessor and a battery packaged in the housing. , There is an electromagnetic induction area on the shell, and the microprocessor is connected with the intelligent monitoring terminal through the communication module, which can be charged wirelessly. The invention patent with application number 202110451351.4 discloses an implantable cardiac pacemaker, which is electrically connected to the power supply component. The power supply component is implanted between the heart and the pericardium, and is attached to the surface of the heart through a piezoelectric unit to generate cardiac contraction and relaxation. The mechanical energy is converted into electrical energy for power supply. The utility model patent with application number 201921493527.7 discloses a cardiac pacemaker, including a mounting case, a pulse generator, and a power supply device; the power supply device includes a vibration power supply and/or a thermoelectric power supply; stable performance and long service life , capable of energy replenishment.

At present, thermoelectric power generation and energy storage technologies have been applied and developed. For example, the invention patent with application number 201410223834.9 discloses a flexible thermoelectric power generation micro-unit structure, which is flexible and stable, and can supply energy for medical micro-device implanted in the body. The invention patent with application number 200410084572.9 discloses a green energy storage thin-film battery and its preparation method. The thin-film battery has low cost and is suitable for use as pacemakers and implantable medical devices. The utility model patent with the application number 201520228809.X discloses a flexible thin-film thermoelectric power generation device, including at least two flexible thin-film thermoelectric battery packs; small in size, light in weight, and high in performance; Manufacturing cost of thin film thermoelectric battery.

People have conducted research on the application of thermoelectric power generation technology to implantable medical devices. Modern medicine has confirmed that there is a temperature difference in the human body, and the temperature gradually decreases from the core to the body surface, and the closer the distance to the body surface, the greater the temperature difference; in different external environments, there is a temperature difference under the human body, and the existing temperature difference power generation materials can be used as The pacemaker provides energy. For example, Wei Xiaojuan, Yang Yang, and Liu Jing published the article "Animal Experimental Research on Implantable Thermoelectric Power Generation Technology" in the journal "Beijing Biomedical Engineering" (June 2008, Volume 27, Issue 3), through the common The thermoelectric sheet was implanted into the rabbit body, and the animal experiments proved that it is feasible to use the temperature difference of the human body to power the implanted medical device.

In addition, people have conducted research on the encapsulation and anti-adhesion of implantable medical devices. For example, the invention patent application number 201710602315.7 discloses a medical implant device with an encapsulation layer, including a device body and an encapsulation layer. The encapsulation layer With good biocompatibility, it can well isolate the water and oxygen environment of body fluids in the human body and improve the life of the device. The invention patent with the application number 03823496.3 discloses an anti-adhesion film, which is arranged on the implant to prevent the adhesion between the implant and the surrounding tissue.

With the development of new-generation information technologies such as the Internet of Things, big data and artificial intelligence, the intelligence, safety, battery life and convenience of pacemakers have been continuously improved, and the functions (especially the intelligent perception function) have been continuously enhanced, and they are more energy-efficient and compact. Keep shrinking, and new technologies for pacemakers keep emerging. For example, the invention patent with the application number 202011536404.4 discloses an implantable cardiac pacemaker. By adding an AI module, it can adapt to the differences of different individuals and has the ability to grow; it uses a flexible linear battery to increase power supply. The ability to reduce the volume solves the problems of discomfort and fragility. The invention patent with the application number 202110828844.5 discloses an implantable pacemaker and its remote monitoring system, including a pacemaker main body and an electrode connection end; a Bluetooth antenna is installed inside the electrode connection end; the Bluetooth antenna sends ECG signals to the outside To the Bluetooth receiving terminal, the Bluetooth receiving terminal uploads the ECG signal to the patient file database through the Internet, and remotely monitors the patient's condition. The invention patent with application number 202011345535.4 discloses an implantable device, its power transmitting and receiving unit and power transmission device, which uses bipolar coils to improve the efficiency of wireless power transmission and improve the electromagnetic safety of power transmission.

Utility model content

The purpose of the utility model is to provide an implantable pacemaker that uses temperature difference power generation technology and materials to reduce volume, improve battery life, service life and operation convenience, and reduce operation risk. The orientation described in this manual is based on the implanted pacemaker shown in Figure 1; the direction close to the reader is the front, the direction away from the reader is the rear; the left and right directions are horizontal; other directions and so on. Concrete technical scheme of the present utility model is as follows.

An implantable pacemaker that uses temperature difference to generate electricity, including an insert body 1, a housing 2, a communication element 3, a heat conduction element 4 and a circuit board 5, as shown in Figure 1, is surgically implanted subcutaneously, and through the The communication part 3 communicates wirelessly with the program controller outside the body to perform regulation and information transmission, and the circuit board 5 is electrically connected and fastened to the electrode wires through the connector 1, so that the electrodes generate electric pulses for pacing therapy .

The heat conduction element 4 is located inside the housing 2, and abuts and fits with the housing 2, so as to establish a heat conduction channel from the inside to the outside of the human body at the implantation site, and promote the heat of the human body to pass through the heat conduction channel. The pacemaker emits to the body surface, which increases the interference to the temperature field of the human body at the implantation site of the pacemaker, increases the temperature gradient at the implantation site, and then increases the temperature difference between the front surface and the rear surface of the housing 2 , it is convenient to use the temperature difference to generate electricity, and improve the power and efficiency of electricity generation, so as to provide power and charge for the pacemaker.

The plug-in body 1 is a horizontal bar-shaped block structure, with a plug-in hole 11 at the right end, through which the electrode wire is inserted, so that the circuit board 5 is electrically connected and fastened to the electrode wire , so that the electrodes generate electrical pulses for pacing therapy. The insertion hole 11 is a horizontal circular hole, exposing the right end surface of the insertion body 1 at the right end, and includes a plurality of sections insulated from each other along the transverse direction, so that the pacemaker can sense information of the human body, and Send electrical pulses. The inner surface of the rightmost section of the insertion hole 11 is provided with an elastic sealing sleeve, through which the sealing sleeve is elastically clamped with the electrode wire to realize fast connection and sealing, so as to isolate the body fluid of the human body .

Further, the socket body 1 is inserted into the housing 2 at the lower part, and is fixedly connected with the housing 2, so that the socket body 1 and the housing 2 are integrated. Wires protrude from the lower side of the socket body 1 , and the segments of the socket holes 11 are electrically connected to the circuit board 5 through the wires. The wires extend up and down and are insulated from each other. The upper end is fixedly connected to the section of the insertion hole 11, and the lower end is fixedly connected to the circuit board 5, so as to realize the segmentation of the insertion hole 11 and the circuit board. 5 electrical connections.

The housing 2 is a horizontally erected oblong pie-shaped container with an inner surface and an outer surface, and accommodates the communication element 3, the heat conduction element 4 and the circuit board 5 inside, and includes a front shell and a rear shell that are symmetrical to each other. body, as shown in Figure 2. Both the front shell and the rear shell are oblong circular curved plate structures with outer edges and inner edges, and are dish-shaped as a whole. The front shell protrudes forward on the front surface, and the rear shell protrudes backward on the rear surface; the front shell and the rear shell are symmetrical to each other, aligned, and fixedly connected on the outer edge, so that the The housing 2 presents an oblong pie-shaped container, as shown in FIG. 2 . Both the front shell and the rear shell are clamped and sealed with the communication piece 3 on the inner side, so that the communication piece 3 exposes the shell 2 and can communicate wirelessly with the program controller outside the body, avoiding electromagnetic shielding .

Further, the housing 2 is open on the left side of the upper surface to form an upward opening, through which the socket body 1 is inserted into the housing 2 at the lower part, and is connected with the housing 2 Fixedly connected, so that the plug-in body 1 and the housing 2 are integrated; also make the wire protruding from the lower side of the plug-in body 1 enter the inside of the housing 2 through the opening, and connect with the circuit board 5 fixed connections.

Further, both the front surface of the front casing and the rear surface of the rear casing have projections 21 and recesses 22 along the radial direction, so that the casing 2 has radially extending Radial protrusions 21 and depressions 22 can increase the contact area with the human tissue at the implanted site of the pacemaker to facilitate heat conduction; they can also increase the overall thickness of the pacemaker and increase the impact on the human body at the implanted site. The interference of the temperature field increases the temperature gradient of the implantation site, thereby increasing the temperature difference between the front surface and the rear surface of the casing 2, which facilitates the use of temperature difference to generate electricity, and improves the power and efficiency of the power generation. Power and charge.

The protrusions 21 and the depressions 22 are alternately and uniformly distributed along the circumferential direction; the protrusions 21 gradually become wider radially from the inside to the outside; the depressions 22 are uniform from the inside to the outside along the radial direction; The inner surface of the protrusion 21 is in contact with the heat conduction element 4; the contact area between the inner surface of the housing 2 at the protrusion 21 and the heat conduction element 4 can be increased to facilitate the use of temperature difference Generate electricity, and improve the power and efficiency of power generation, and provide power and charge for the pacemaker; it can also increase the structural strength of the casing 2 to avoid damage.

Further, the casing 2 includes at least a shielding layer 23 , a pyroelectric layer 24 and an electrical storage layer 25 between the inner surface and the outer surface, from outside to inside, as shown in FIG. 3 . The shielding layer 23 is located on the outer layer of the casing 2 and is made of electromagnetic shielding material, which can perform electromagnetic shielding and prevent the electromagnetic field outside the body from affecting the normal operation of the pacemaker.

The thermoelectric layer 24 is fixedly connected to and insulated from the shielding layer 23 on the outer surface, and is made of flexible thermoelectric material, or is made of flexible material wrapped with thermoelectric elements, and can generate electricity by using temperature difference to provide power for the pacemaker and Charge. The thermoelectric layer 24 is electrically connected with the circuit board 5, and can supply power and charge the pacemaker, improve the battery life and service life of the pacemaker; it can also reduce the mass and save space.

The electricity storage layer 25 is fixedly connected and insulated with the thermoelectric layer 24 on the outer surface, is made of electricity storage material, and can store electric energy and charge. The electrical storage layer 25 is electrically connected to the circuit board 5, so that the electrical storage layer 25 can supply power to the pacemaker, and can also reduce mass and save space. The electricity storage layer 25 has a through hole, so that the heat conducting member 4 can pass through the through hole, and can be abutted and attached to the thermoelectric layer 24, so that the thermoelectric layer 24 can utilize the human body at the implantation site. Temperature difference power generation, improve power generation power and efficiency.

The communication member 3 is a cylindrical structure with a wireless communication element inside, passes through the circuit board 5, and is fixedly connected with the circuit board 5, as shown in Figure 2, so that the wireless communication element is connected to the circuit board 5. The circuit board 5 is electrically connected. The front end of the communication part 3 is snapped and sealed with the inner edge of the front casing, and the rear end of the side is snapped and sealed with the inner edge of the rear casing, so that the communication part 3 exposes the The casing 2 is sealed relative to the casing 2, capable of wireless communication with the program controller outside the body, and the electromagnetic shielding of the casing 2 on the shielding layer 23 is avoided.

The heat conduction element 4 is located inside the housing 2, and is a bar-shaped block structure extending radially, uniformly distributed along the circumferential direction, passing through the circuit board 5, and fixedly connected with the circuit board 5, To obtain fixation and support, as shown in Figure 1. The heat conducting member 4 abuts and adheres to the inner surface of the housing 2 at the protrusion 21 on both the front side and the rear side, passes through the through hole of the electrical storage layer 25, and is in contact with The thermoelectric layer 24 abuts and adheres to conduct heat, so that the thermoelectric layer 24 can generate electricity by using the temperature difference of the human body at the implanted site, thereby improving the power and efficiency of power generation.

Further, the heat conduction member 4 extends radially and gradually becomes thicker from the inside to the outside in the radial direction, and can adapt to the inner surface of the housing 2 that abuts and fits on the protrusion 21 to increase the contact area. , it is convenient for heat conduction, and it is convenient for the thermoelectric layer 24 to use the temperature difference of the human body at the implantation site to generate electricity, so as to improve the power and efficiency of power generation.

Further, the heat-conducting element 4 has side wings 42 that protrude laterally and are parallel to each other on the side along the circumferential direction, and there are wing grooves 41 between the side wings 42 that are parallel to each other, which can increase the heat-conducting element 4. surface area to facilitate heat exchange with the internal environment of the pacemaker. When the temperature of the environment inside the pacemaker is too high, the heat conducting element 4 can absorb heat and dissipate heat; avoid overheating and damage of the pacemaker, improve operational reliability and service life.

The circuit board 5 is an oblong thin plate structure with a through hole, so that the communication element 3 and the heat conduction element 4 pass through the through hole, and use the through hole to communicate with the communication element 3 and the heat conduction element 4 is fixedly connected, and is also fixed inside the casing 2 through the communication element 3 and the heat conduction element 4, and integrated, which can effectively prevent the communication element 3, the heat conduction element 4 and the circuit board 5 from Rotate and move to ensure that the communication part 3 is sealed reliably relative to the housing 2 .

Furthermore, the circuit board 5 has components 51 on the front surface, so that the pacemaker can sense the information of the human body, perform intelligent regulation, send electric pulses in time, and perform pacing therapy; it can use the new generation of information technology, Improve the level of intelligence and save energy; be able to communicate wirelessly with the program controller outside the body, receive and store control information, store and send the operating data of the pacemaker (including at least operating status, historical data, and operating logs), alarm data, and Various sensory information of the human body.

The components 51 are composed of modules, modules and electronic components, including at least a microprocessor and a power supply module, fixedly installed on the circuit board 5, and electrically connected to the circuit board 5 for data processing, storage and sending and receiving . The power module is electrically connected to the thermoelectric layer 24 and the electricity storage layer 25 respectively, so that the thermoelectric layer 24 can charge the electricity storage layer 25 through the power module, thereby improving the battery life and power of the pacemaker. service life. The microprocessor is electrically connected to the power module, and can switch the power supply of the thermoelectric layer 24 and the power storage layer 25 in a timely manner through intelligent calculation and remote control, and make real-time decisions and determine whether the thermoelectric layer 24 is the power storage layer 25 charge, save energy, and improve service life.

Supplementary notes: (1) The housing 2 has protrusions 21 and depressions 22 along the radial direction on the front and rear surfaces; the protrusions 21 gradually become wider in the radial direction from the inside to the outside; the shell The inner surface of the body 2 at the position of the protrusion 21 is in contact with the heat conduction element 4; the heat conduction element 4 passes through the circuit board 5, stretches radially, and gradually changes radially from inside to outside. The inner surface of the shell 2 at the position of the protrusion 21 can be adapted to be abutted and bonded.

Therefore, the pacemaker of the present utility model can use the front surface and the back surface to increase the contact area with the human tissue at the implanted site, which is convenient for heat conduction; it can also increase the overall thickness of the pacemaker, and increase the impact on the human body. The interference of the temperature field at the implantation site increases the temperature gradient at the implantation site, thereby increasing the temperature difference between the front surface and the rear surface of the shell 2, which facilitates the use of temperature difference to generate electricity, and improves the power and efficiency of power generation.

(2) According to the research of biological heat transfer, the thermal conductivity of human tissue is much lower than that of metal. The heat conducting member 4 is capable of conducting heat, and is preferably made of copper, aluminum, silver and alloys thereof. In addition, the heat conducting member 4 passes through the electricity storage layer 25 of the housing 2 , and abuts and adheres to the thermoelectric layer 24 . Therefore, the pacemaker of the present utility model can utilize the heat conduction element 4, and the shielding layer 23 and the electric storage layer 25 of the front shell and the rear shell of the shell 2 to establish a human body in implantation. The inner-to-outward heat conduction channel at the entry site promotes the heat of the human body to be dissipated to the body surface through the pacemaker; increases the temperature difference between the front surface and the rear surface of the casing 2, facilitates the use of temperature difference to generate electricity, and increases the power generation and efficiency.

(3) The circuit board 5 is fixedly connected to the communication part 3 and the heat conduction part 4; the heat conduction part 4 passes through the circuit board 5, abuts and fits on the protrusion 21 of the housing 2 The inner surface of the part; therefore, the circuit board 5 can be fixed inside the housing 2 through the communication element 3 and the heat conduction element 4, so as to be integrated.

In addition, since the protrusions 21 and the depressions 22 are alternately and evenly distributed along the circumferential direction, it is possible to effectively prevent the communication member 3, the heat conduction member 4 and the circuit board 5 from rotating and moving relative to the housing 2, ensuring The communication member 3 is reliably sealed relative to the casing 2; it can also increase the structural strength of the casing 2 and avoid damage.

(4) The heat conduction member 4 passes through the circuit board 5 and maintains a state of abutting and bonding with the inner surface of the housing 2 at the position of the protrusion 21 , so as to facilitate heat conduction. Therefore, it is preferable that both the heat conducting member 4 and the circuit board 5 adopt common rigid structures, and the thermoelectric layer 24 of the housing 2 adopts an elastic structure made of flexible materials.

(5) The shell 2 has protrusions 21 and recesses 22 along the radial direction on the front surface and the rear surface, so as to increase the contact area with the human tissue at the implantation site. In order to prevent the adhesion between the housing 2 and human tissue, it is preferable to add an encapsulation layer on the outer surface of the shielding layer 23 .

The beneficial effects of the utility model are as follows: (1) The housing 2 includes at least a shielding layer 23 , a thermoelectric layer 24 and a storage layer 25 between the inner surface and the outer surface, from outside to inside; 24 is electrically connected with the circuit board 5, and can generate electricity by using temperature difference, and supply power and charge for the pacemaker; the power storage layer 25 can store electric energy and charge, and supply power for the pacemaker; the heat conducting element 4 Passing through the electricity storage layer 25 , abutting and adhering to the thermoelectric layer 24 facilitates the thermoelectric layer 24 to generate electricity by utilizing the temperature difference of the human body at the implantation site, thereby improving power generation and efficiency.

Therefore, compared with the existing pacemaker using a primary battery, the pyroelectric layer 24 and the storage layer 25 of the present invention are contained in the housing 2, without using a detachable primary battery, which can save space and serve as The above-mentioned circuit board 5 strives for more space, and the space layout is more reasonable; it can increase the wall thickness of the casing 2 and improve the structural strength; it can promote the application and development of advanced material technology, reduce the volume and reduce the quality. Compared with the existing rechargeable and self-generating pacemakers, the pacemaker of the present utility model uses the temperature difference of the human body at the implantation site to generate electricity, which can improve the power and efficiency of power generation, and provide electrical energy for the pacemaker. It can improve battery life and service life.

Compared with the prior art disclosed in the invention patent (an implantable cardiac pacemaker) with the application number of 202110451351.4, the pacemaker of the present utility model can be implanted subcutaneously through surgery, which can reduce the volume and quality, without Perform complex surgical operations; can improve the convenience of surgery and reduce the risk of surgery; can also reduce the pain of patients and save surgical costs.

(2) The shell 2 of the present invention has protrusions 21 and depressions 22 alternately and evenly distributed along the circumferential direction on the front surface and the rear surface, which can increase the contact area with the human tissue at the implanted site, Facilitate heat conduction; increase the overall thickness of the pacemaker; the heat conduction element 4 is capable of heat conduction, is located inside the casing 2 , and abuts and adheres to the casing 2 .

Therefore, compared with the existing rechargeable and self-generating pacemakers, the pacemaker of the present utility model can increase the interference to the temperature field of the human body at the implantation site, increase the temperature gradient of the implantation site, and further The temperature difference of the housing 2 at the front surface relative to the rear surface is increased.

In addition, the heat conducting member 4 abuts and adheres to the inner surface of the casing 2 at the position of the protrusion 21 on both the front side and the rear side, and passes through the electricity storage layer 25 of the casing 2 , and contact and stick to the thermoelectric layer 24 . Therefore, the pacemaker of the present utility model can utilize the heat conduction element 4, and the shielding layer 23 and the electric storage layer 25 of the front shell and the rear shell of the shell 2 to establish a human body in implantation. The heat conduction channel from the inside to the outside of the implant site promotes the heat dissipation of the human body to the body surface through the pacemaker, facilitates the use of temperature difference to generate electricity, and improves the power and efficiency of power generation.

(3) The circuit board 5 of the present utility model is fixedly connected with the communication part 3 and the heat conduction part 4; The inside surface of the protrusion 21. The protrusions 21 and the depressions 22 are alternately and evenly distributed along the circumferential direction.

Therefore, the pacemaker of the present utility model can effectively prevent the communication part 3, the heat conduction part 4 and the circuit board 5 from rotating and moving relative to the housing 2, and ensure that the communication part 3 is relatively stable relative to the housing 2. The seal is reliable; it can also increase the structural strength and avoid damage.

In addition, the present invention can effectively reduce the strength requirements on the shielding layer 23 of the housing 2 . Therefore, compared with the existing pacemaker adopting titanium alloy casing, the utility model can reduce the thickness of the casing 2 on the shielding layer 23, and utilize cheaper materials and processing techniques, and can also promote advanced The application and development of material technology can reduce quality and cost.

(4) The shielding layer 23 of the present invention is located on the outer layer of the housing 2 and can perform electromagnetic shielding to prevent the electromagnetic field outside the body from affecting the normal operation of the pacemaker; the communication part 3 has a The wireless communication element is electrically connected with the circuit board 5; the communication part 3 exposes the housing 2, and is sealed relative to the housing 2, and can communicate wirelessly with the program controller outside the body, avoiding the housing 2 Electromagnetic shielding in the shielding layer 23.

Therefore, the pacemaker of the present invention can use the wireless communication element of the communication part 3 to perform wireless communication, effectively avoiding electromagnetic shielding; and can effectively prevent the electromagnetic field outside the body from affecting the normal operation of the pacemaker. In addition, the utility model can promote the application and development of advanced wireless communication technology, and improve the efficiency and electromagnetic safety of wireless signal transmission.

(5) The circuit board 5 of the present utility model has components 51; the components 51 include at least a microprocessor and a power module; the power module is electrically connected to the thermoelectric layer 24 and the storage layer 25 respectively ; The pyroelectric layer 24 can charge the electricity storage layer 25 through the power module. The microprocessor is electrically connected to the power module, and can switch the power supply of the thermoelectric layer 24 and the power storage layer 25 in a timely manner through intelligent calculation and remote control, and make real-time decisions and determine whether the thermoelectric layer 24 is the power storage layer 25 charge.

Therefore, the pacemaker of the present utility model switches the power supply in a timely manner, makes real-time decisions and determines whether to charge, can save energy, and improve the service life; it can also promote the application and development of a new generation of information technology, and improve the intelligent perception of human body information Ability to improve the intelligence level of computing, decision-making and regulation. In addition, the pacemaker of the present invention can further promote the application and development of advanced integrated circuit technology, and promote the development of electronic components in terms of miniaturization, low power consumption, intelligence and high reliability.

Description of drawings

Fig. 1 is the general structure schematic diagram of described pacemaker;

Fig. 2 is the sectional view shown in A - A among Fig. 1;

Fig. 3 is a partially enlarged view shown in B in Fig. 2 .

Explanation of reference numerals: socket body 1, socket hole 11, housing 2, protrusion 21, depression 22, shielding layer 23, thermoelectric layer 24, electricity storage layer 25, communication element 3, heat conducting element 4, wing groove 41 , side wings 42 , circuit board 5 , components 51 .

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the technical scheme of the present utility model is described in detail: Fig. 1 is the overall structure schematic diagram of described pacemaker, and Fig. 2 is the sectional view shown in A - A among Fig. 1; Fig. 1 As shown in FIG. 2 , the pacemaker includes an insert body 1 , a casing 2 , a communication element 3 , a heat conducting element 4 and a circuit board 5 .

The insertion body 1 is a bar-shaped block structure with insertion holes 11. Preferably, the metal elements are formed into the insertion holes 11 first, and then immersed in the resin material and hot-pressed. The resin material is preferably a composite resin material with better biocompatibility. In order to facilitate the insertion of the electrode lead into the insertion hole 11 and to electrically connect with the electrode lead, the metal element is preferably made of phosphor bronze. The elastic sealing sleeve provided in the rightmost segment of the insertion hole 11 is preferably made of medical silicone rubber to achieve fast connection and sealing.

The fixed connection between the insert body 1 and the housing 2 at the lower part is preferably bonded with a known adhesive to ensure a reliable connection. The wires protruding from the lower side of the socket body 1 are preferably known wires, and have an insulating layer and a shielding layer on its surface; The connections are preferably welded to ensure reliable electrical connection.

As shown in FIG. 2 , the casing 2 is a horizontally vertical oblong pie-shaped container, including a front casing and a rear casing that are symmetrical to each other. Both the front shell and the rear shell are oblong circular curved plate structures with outer edges and inner edges, and are dish-shaped as a whole. The fixed connection of the front shell and the rear shell on the outer edge is preferably to open a bevel on the outer edge, fit through the bevel, and use an adhesive to bond the mated part, or weld .

FIG. 3 is a partial enlarged view shown in B in FIG. 2 , showing the structure of the housing 2 in cross section. As shown in FIG. 3 , the housing 2 includes at least a shielding layer 23 , a pyroelectric layer 24 and an electrical storage layer 25 between the inner surface and the outer surface, from outside to inside. The shielding layer 23 is located on the outer layer of the housing 2 and can perform electromagnetic shielding. Preferably copper, aluminum and their alloys are stamped and formed, and an encapsulation layer is added on the outer surface; titanium alloy stamped and formed can also be used. The purpose of adding the encapsulation layer is to improve corrosion resistance and biocompatibility, and prevent adhesion with human tissues. Preferably, after the pacemaker is assembled, it is encapsulated by spin coating, pulling and spraying. . The protrusions 21 and the recesses 22 of the housing 2 are simultaneously obtained during the forming process of the shielding layer 23 .

The thermoelectric layer 24 can use temperature difference to generate electricity, and is preferably made of flexible thermoelectric material, or the thermoelectric element can be dipped in flexible insulating resin glue and formed by hot pressing. The outer surface of the thermoelectric layer 24 is fixedly connected and insulated with the shielding layer 23. Preferably, the inner surface of the shielding layer 23 is coated with flexible insulating resin glue, and the outer surface of the thermoelectric layer 24 is connected by the resin glue. Surface bonding.

The electricity storage layer 25 is capable of storing electric energy and charging, and is preferably processed and formed from existing battery materials that can be made into flexible sheets, such as paper batteries, carbon nanotubes and graphene. The electrical storage layer 25 has through-holes obtained during its forming. The electrical storage layer 25 is fixedly connected and insulated with the thermoelectric layer 24 on the outer surface, preferably, the outer surface, the inner surface and the through holes of the electrical storage layer 25 are brushed with flexible insulating resin glue, and air-dried; Then paint flexible insulating resin glue on the outer surface of the electricity storage layer 25 , and bond the electricity storage layer 25 through the resin glue. The electrical connection between the thermoelectric layer 24 and the electricity storage layer 25 and the circuit board 5 is preferably achieved by welding metal conductors to the circuit board 5 .

The communication piece 3 is a cylindrical structure with wireless communication elements inside. The wireless communication element is preferably a known wireless communication module capable of realizing short-distance wireless communication, and is preferably encapsulated in a cylindrical insulating casing to form the communication piece 3 . The fixed connection between the communication element 3 and the circuit board 5 is preferably welded, and can also be welded or glued; the connection between the wireless communication element and the circuit board 5 is preferably welded to ensure reliable electrical connection. The clamping and sealing of the communication part 3 at the front end of the side and the inner edge of the front housing, and the clamping and sealing of the rear end of the side and the inner edge of the rear housing are preferably at the clamping position. Well-known adhesives are used for bonding to ensure a reliable seal.

As shown in FIG. 1 , the heat conduction member 4 is capable of conducting heat, and is a bar-shaped block structure extending radially, with protruding side wings 42 parallel to each other on the side, and wings between the side wings 42 Ditch 41. The heat conducting element 4 and its wing grooves 41 and side wings 42 are preferably formed by die-casting of copper, aluminum, silver and alloys thereof. The heat conducting element 4 passes through the circuit board 5 and is fixedly connected to the circuit board 5, preferably by welding or bonding.

The heat-conducting member 4 abuts and adheres to the inner surface of the housing 2 at the position of the protrusion 21 on both the front side and the rear side. Therefore, the heat-conducting member 4 is preferably wire-drawn or shot-peened at the abutting and bonded part, and coated with heat-conducting silicone grease, which can improve the surface roughness, and through the contact between the heat-conducting silicone grease and the housing 2 The thermoelectric layer 24 abuts and adheres to improve thermal conductivity.

The circuit board 5 is an oblong thin plate structure with through holes and components 51 on the front surface. The components 51 are composed of modules, modules and electronic components, including at least a microprocessor and a power supply module, preferably existing modules, modules and electronic components. The fixed installation of the components 51 on the circuit board 5 is preferably soldered. The layout of the components 51 on the circuit board 5 is preferably along the radial direction, so as to avoid interference with the heat conducting element 4 as much as possible. As shown in Figure 1, when the components 51 interfere with the heat conduction element 4, it is preferable to slot, open or cut off the heat conduction element 4 to ensure the normal operation and optimum performance of the components 51. layout.

The above-mentioned implementation is only a preferred embodiment of the present utility model, and does not constitute a limitation to the present utility model. Under the condition of satisfying the structure and performance requirements of the utility model, changing the material and manufacturing process is within the protection scope of the utility model.

Claims (9)

1. An implantable pacemaker that uses temperature difference to generate electricity, including an insert body (1), a housing (2), a communication part (3) and a circuit board (5), implanted subcutaneously, through the communication part (3) Communicate wirelessly with the program controller outside the body, connect the circuit board (5) with the electrode wire through the connector (1), generate electric pulses, and perform pacing therapy; it is characterized in that it also includes a heat conduction element (4); The heat conduction element (4) is located inside the housing (2), and abuts and fits with the housing (2), which can promote the heat of the human body to be dissipated to the body surface through the pacemaker, thereby increasing The temperature gradient of the large implantation site increases the temperature difference of the shell (2), which facilitates the use of temperature difference to generate electricity, and improves the power and efficiency of power generation; The housing (2) is an oblong pie-shaped container with an inner surface, and accommodates the communication element (3), heat conduction element (4) and circuit board (5) inside; The housing (2) has protrusions (21) and depressions (22) on the front and rear surfaces, which can increase the contact area with human tissue, facilitate heat conduction, increase the overall thickness, and increase the thickness of the housing. (2) the temperature difference at the front surface relative to the rear surface; The protrusions (21) and depressions (22) are distributed alternately along the circumferential direction, the protrusions (21) gradually widen from the inside to the outside in the radial direction, and the housing (2) is located between the protrusions ( 21) The inner surface of the part is in contact with the heat conduction element (4), which can increase the contact area between the housing (2) and the heat conduction element (4), facilitate the use of temperature difference to generate electricity, and increase the power generation and efficiency, and can also increase the structural strength of the housing (2); The housing (2) at least includes a shielding layer (23), a pyroelectric layer (24) and an electrical storage layer (25) from outside to inside; The thermoelectric layer (24) is fixedly connected and insulated with the shielding layer (23), and can generate electricity by using temperature difference; the thermoelectric layer (24) is electrically connected to the circuit board (5), and can provide the pacemaker Power supply and charging, improve battery life and service life; The electricity storage layer (25) is fixedly connected and insulated with the thermoelectric layer (24), capable of storing electric energy and charging; the electricity storage layer (25) is electrically connected with the circuit board (5), and can provide the Pacemaker power supply can also reduce mass and save space; The heat conduction element (4) is a bar-shaped block structure, passing through the circuit board (5); the heat conduction element (4) is connected with the housing (2) on the convex The inner surface of the part (21) abuts and adheres, passes through the electricity storage layer (25), abuts and adheres to the thermoelectric layer (24), and can conduct heat, so that the thermoelectric layer (24) Use temperature difference to generate electricity to improve power generation and efficiency. 2. An implantable pacemaker using temperature difference to generate electricity according to claim 1, characterized in that: the casing (2) includes a front casing and a rear casing; Both the front shell and the rear shell are oblong circular curved plate structures with outer edges and inner edges, and are generally dish-shaped; The front shell and the rear shell are mutually symmetrical and aligned, and are fixedly connected on the outer edge, so that the shell (2) presents an oblong pie-shaped container; Both the front shell and the rear shell are clamped and sealed with the communication piece (3) on the inner side, so that the communication piece (3) exposes the shell (2), enables wireless communication, and avoids electromagnetic shielding . 3. An implantable pacemaker using temperature difference to generate electricity according to claim 1, characterized in that: the electrical storage layer (25) has a through hole, so that the heat conducting member (4) passes through the The said through hole can be abutted and attached to the thermoelectric layer (24), so that the thermoelectric layer (24) can use the temperature difference of the human body to generate electricity, thereby improving the power and efficiency of power generation. 4. The implantable pacemaker using temperature difference to generate electricity according to claim 1, characterized in that: the shielding layer (23) is located on the outer layer of the housing (2), capable of electromagnetic shielding, Avoid affecting the normal work of the pacemaker. 5. An implantable pacemaker using temperature difference to generate electricity according to claim 1, characterized in that: the communication piece (3) is a cylindrical structure with a wireless communication element inside, passing through the a circuit board (5), and connected with the circuit board (5); The communication part (3) exposes the housing (2), is sealed relative to the housing (2), is capable of wireless communication, and avoids electromagnetic shielding. 6. An implantable pacemaker that utilizes temperature difference to generate electricity according to claim 1, characterized in that: the heat conducting element (4) extends radially and is evenly distributed along the circumferential direction; The heat conduction member (4) gradually becomes thicker from the inside to the outside in the radial direction, and is able to adapt to the inner surface of the shell (2) on the protrusion (21) that abuts and fits, increasing the contact area and facilitating heat conduction. 7. An implantable pacemaker using temperature difference to generate electricity according to claim 1, characterized in that: said heat conducting element (4) has laterally protruding side wings (42), and said side wings (42) ) with wing grooves (41), which can increase the surface area of the heat conducting member (4) and facilitate heat exchange; When the temperature of the pacemaker is too high, the heat conduction member (4) can absorb heat, avoid overheating and damage, and improve operation reliability and service life. 8. An implantable pacemaker using temperature difference to generate electricity according to claim 1, characterized in that: the circuit board (5) is a thin plate structure with through holes, so that the communication piece (3 ) and the heat conducting member (4) pass through the through hole; The circuit board (5) is fixedly connected to the communication part (3) and the heat conduction part (4) by using the through hole; The circuit board (5) is fixed inside the casing (2) through the communication element (3) and the heat conduction element (4), which can avoid rotation and movement and ensure reliable sealing. 9. An implantable pacemaker using temperature difference to generate electricity according to claim 1, characterized in that: the circuit board (5) has components (51), so that the pacemaker can sense the human body Information, intelligent regulation, timely sending of electrical pulses, pacing therapy; The components (51) include at least a microprocessor and a power module; The power supply module is electrically connected to the thermoelectric layer (24) and the electricity storage layer (25) respectively, so that the thermoelectric layer (24) can charge the electricity storage layer (25), improving battery life and service life; The microprocessor is electrically connected to the power supply module, switches the power supply of the thermoelectric layer (24) and the power storage layer (25) in a timely manner, and determines whether the thermoelectric layer (24) is charging the power storage layer (25) in real time , save energy and increase service life.

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