Bidirectional swing electromagnetic energy harvester and electronic device

Abstract

The present application belongs to the technical field of swing energy trapping, and particularly relates to a bidirectional swing electromagnetic energy trapping device and electronic equipment. The bidirectional swing electromagnetic energy trapping device comprises a magnetic sensing structure, a transmission structure, and a swing structure. The magnetic sensing structure comprises a central rotating shaft, a central rotating disc rotatably connected to the central rotating shaft, a magnet for generating a magnetic field, and a coil located in the magnetic field, the magnet and the coil being selectively connected to the central rotating disc. The transmission structure comprises a first transmission assembly located on one side of the central rotating disc and a second transmission assembly located on the other side of the central rotating disc. The swing structure is swingably arranged around the central rotating shaft and comprises a reversing element and a swing element slidably arranged in a predetermined direction along the axial direction of the central rotating shaft. When the swing element swings in a first direction, the reversing element guides the swing element to slide and is transmissionally connected to the first transmission assembly. When the swing element swings in a second direction, the reversing element guides the swing element to slide and is transmissionally connected to the second transmission assembly. The present application improves the energy trapping efficiency, and realizes energy trapping under wideband, low frequency, and small amplitude swing.

Description

Technical Field

[0001] This invention belongs to the field of swing energy harvesting technology and equipment, and particularly relates to a bidirectional swing electromagnetic energy harvester and electronic equipment. Background Technology

[0002] With the rapid development of the Internet of Things (IoT) and microelectronics technologies, miniaturized, low-power electronic devices such as wireless sensors and wearable devices are being used more and more widely. How to provide continuous and reliable power to these widely distributed devices, which may be in harsh environments, has become a key bottleneck restricting their large-scale application.

[0003] Traditional chemical batteries, due to their limited lifespan, high maintenance costs, and environmental pollution, cannot meet the demand for long-term maintenance-free operation. Therefore, energy harvesting technologies that capture energy from the surrounding environment (such as vibrational energy and mechanical energy) and convert it into electrical energy have attracted widespread attention from researchers. Among environmental mechanical energy, oscillating energy (such as the swaying of limbs during human walking, the swaying caused by wave undulation, etc.) is a widely distributed form with high energy density.

[0004] Although existing electromagnetic energy harvesters have made some progress in energy harvesting, they still have the following significant drawbacks in harvesting bidirectional oscillating energy: 1. Severe energy loss during commutation: In traditional reciprocating oscillating energy harvesters, the rotor speed must be reduced to zero each time it changes direction. This not only causes an interruption in energy output at the moment of commutation, but also results in serious waste of kinetic energy due to frequent deceleration and reverse acceleration.

[0005] 2. Low energy utilization: During bidirectional oscillation, the oscillation frequency is usually low and discontinuous, making it difficult for traditional structures to maintain the high-speed operation of the generator, resulting in a small induced current that is difficult to meet the continuous power supply requirements of low-power devices.

[0006] 3. Complex mechanical structure and high wear: Existing solutions for achieving unidirectional rotation (such as using complex gear sets or reversing ratchet) often have large structural dimensions, which do not meet the requirements of miniaturized equipment. At the same time, complex mechanical transmissions generate significant frictional losses, shortening the service life of the device.

[0007] 4. Poor adaptability to low-frequency environments: The oscillations in the environment are mostly low-frequency, random, and have variable amplitude. Traditional electromagnetic energy harvesters often have a fixed resonant frequency, which is difficult to effectively match with low-frequency environmental vibrations, resulting in a significant decrease in acquisition efficiency. Summary of the Invention

[0008] The purpose of this application is to provide a bidirectional oscillating electromagnetic energy harvester, which aims to solve the problem of how to improve the efficiency of energy harvesting.

[0009] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, a bidirectional oscillating electromagnetic energy harvester is provided, comprising: A magnetic structure includes a central rotating shaft, a central rotating disk rotatably connected to the central rotating shaft, a magnet for generating a magnetic field, and a coil located within the magnetic field, wherein the magnet and the coil are optionally connected to the central rotating disk; The transmission structure includes a first transmission assembly located on one side of the central turntable and a second transmission assembly located on the other side of the central turntable; and A swing structure is provided to swing around the central axis. The swing structure includes a reversing component and a swing component that is slidably disposed along a predetermined direction, the predetermined direction being along the axial direction of the central axis. When the swinging member swings along the first direction, the reversing member guides the swinging member to slide and is connected to the first transmission assembly to drive the central turntable to rotate along the first direction; when the swinging member swings along the second direction, the reversing member guides the swinging member to slide and is connected to the second transmission assembly to drive the central turntable to continue rotating along the first direction; the first direction is opposite to the second direction.

[0010] Secondly, this application also provides an electronic device, which includes the bidirectional oscillating electromagnetic energy harvester, the bidirectional oscillating electromagnetic energy harvester further includes a housing structure, and the magnetic induction structure and the transmission structure are located within the housing structure.

[0011] The beneficial effects of this application are as follows: the swing structure captures external swing mechanical energy, and then the transmission structure transmits the mechanical energy to the magnetic structure. The commutator can guide the swing component to slide and connect to the first transmission component or the second transmission component, so that the central turntable can always rotate along the first direction. Therefore, when the swing component changes the swing direction, the central turntable does not need to reduce the speed to zero, nor does it need to change the rotation direction, effectively avoiding energy loss when the central turntable changes direction during bidirectional swing. When the swing frequency is low, the central turntable can still maintain a high speed, thereby improving the energy utilization rate and ensuring that the bidirectional swing electromagnetic energy harvester can still maintain a stable current output under the input of reciprocating swing, improving the energy harvesting efficiency and realizing energy harvesting under wide-bandwidth, low-frequency and small-amplitude swing. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the bidirectional oscillating electromagnetic energy harvester provided in the embodiments of this application; Figure 2 This is a three-dimensional structural schematic diagram of a bidirectional oscillating electromagnetic energy harvester provided in another embodiment of this application; Figure 3 yes Figure 1 A cross-sectional schematic diagram of the swinging structure; Figure 4 yes Figure 1 An explosive schematic diagram of the swinging structure; Figure 5 This is a three-dimensional structural schematic diagram of a bidirectional oscillating electromagnetic energy harvester provided in another embodiment of this application; Figure 6 yes Figure 5 A cross-sectional schematic diagram of a bidirectional oscillating electromagnetic energy trap; Figure 7 yes Figure 5 A schematic diagram of the explosion of a bidirectional oscillating electromagnetic energy trap; Figure 8 yes Figure 7 A magnified view of a portion at point A.

[0014] The following are the labeling elements in the figure: 100. Bidirectional oscillating electromagnetic energy harvester; 10. Oscillating structure; 11. Oscillating component; 12. Reversing component; 121. Reversing part; 20. Transmission structure; 21. First transmission assembly; 211. First toothed ratchet ring; 215. First internal tooth; 216. First ratchet; 212. First gear; 30. Magnetic structure; 31. Central rotating shaft; 32. Coil; 33. Central turntable; 22. Second transmission assembly; 221. Second toothed ratchet ring; 222. Second gear; 223. Reversing gear; 225. Second internal tooth; 226. Second ratchet; 1 11. Engaging part; 112. Guide part; 113. Swing rod; 124. First guide surface; 125. Guide limiting groove; 123. Guide through hole; 122. Limiting slide groove; 114. Second guide surface; 40. Housing structure; 41. Mounting cavity; 42. Guide slide groove; 23. Ratchet assembly; 231. Central gear; 232. Pawl; 233. Ratchet; 34. Magnet; 234. Vertical groove wall; 235. Inclined groove wall; 236. Ratchet groove; 237. Transmission ratchet; 238. First abutment surface; 239. Second abutment surface. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the scope of this application.

[0016] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are for ease of description only, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. 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. "A plurality" means two or more, unless otherwise explicitly defined.

[0017] Please see Figures 1 to 4 This application provides a bidirectional oscillating electromagnetic energy trap 100 and an electronic device having the same. The bidirectional oscillating electromagnetic energy trap 100 can capture mechanical energy present in the environment and convert the mechanical energy into electrical energy.

[0018] Please see Figures 1 to 4 The bidirectional oscillating electromagnetic energy harvester 100 includes: a magnetic induction structure 30, a transmission structure 20, and an oscillating structure 10.

[0019] Please see Figures 1 to 4 The magnetic structure 30 includes a central rotating shaft 31, a central rotating disk 33 rotatably connected to the central rotating shaft 31, a magnet 34 for generating a magnetic field, and a coil 32 located in the magnetic field. The magnet 34 and the coil 32 are selectively connected to the central rotating disk 33.

[0020] During use, the magnet 34 can be a permanent magnet, a static magnet, or a constant magnet; there are no restrictions, and it can be selected according to the actual situation. The central turntable 33 can be rotatably connected to the central rotating shaft 31 via a bearing, thus allowing it to rotate relative to the central rotating shaft 31. The central turntable 33 has a positioning through hole, in which the magnet 34 or the coil 32 can be placed. For example, the magnet 34 can be fixed in the positioning through hole, while the coil 32 can be fixed relative to the magnet 34, so that the magnet 34 can rotate synchronously with the central turntable 33, causing a change in the magnetic flux in the coil 32. Alternatively, the coil 32 can be fixed in the positioning through hole, while the magnet 34 can be fixed relative to the coil 32, so that the coil 32 can rotate synchronously with the central turntable 33, causing a change in the magnetic flux in the coil 32, ultimately generating an induced current in the coil 32.

[0021] In this embodiment, the magnet 34 is fixed inside the positioning through hole.

[0022] Please see Figures 1 to 4 The transmission structure 20 includes a first transmission component 21 located on one side of the central turntable 33 and a second transmission component 22 located on the other side of the central turntable 33. It can be understood that both the first transmission component 21 and the second transmission component 22 can transmit the mechanical kinetic energy of the swing structure 10 to the central turntable 33, thereby driving the central turntable 33 to rotate unidirectionally relative to the central shaft 31.

[0023] Please see Figures 1 to 4 The swing structure 10 is oscillating around the central axis 31. The swing structure 10 includes a reversing member 12 and a swing member 11 that slides along a predetermined direction. The predetermined direction is along the axial direction of the central axis 31 and can be represented as X. The swing structure 10 can swing around the central axis 31 as a whole. At the same time, when the swing direction is switched, the swing member 11 can also slide a certain distance along the axial direction of the central axis 31, so that the swing member 11 can be connected to the first transmission component 21 or the second transmission component 22.

[0024] Please see Figures 1 to 4 When the swinging member 11 swings along the first direction, the reversing member 12 guides the swinging member 11 to slide and is connected to the first transmission assembly 21 to drive the central turntable 33 to rotate along the second direction; the first direction can be represented as w1, and the second direction can be represented as w2, with the first direction being opposite to the second direction. External mechanical oscillation can drive the swinging member 11 to swing along the first direction. The swinging member 11 transmits the swinging motion to the central turntable 33 through the first transmission assembly 21. At the same time, the swinging member 11 disengages from the transmission connection with the second transmission assembly 22 and drives the central turntable 33 to rotate along the second direction through the first transmission assembly 21.

[0025] Please see Figures 1 to 4 When the swinging member 11 swings along the second direction, the reversing member 12 guides the swinging member 11 to slide and connects to the second transmission assembly 22 to drive the central turntable 33 to continue rotating along the second direction.

[0026] It is understandable that when the direction of the external mechanical swing changes, the swing direction of the swing member 11 also changes. The swing member 11 switches from the first direction to the second direction. At the same time, the swing member 11 disengages from the transmission connection with the first transmission component 21 and switches to the transmission connection with the second transmission component 22. This cycle continues, while the central turntable 33 always maintains rotation along the second direction.

[0027] Please see Figures 1 to 4This application provides a bidirectional oscillating electromagnetic energy harvester 100. It captures external oscillating mechanical energy through an oscillating structure 10, and then transmits the mechanical energy to a magnetic induction structure 30 through a transmission structure 20. A commutator 12 guides the oscillating member 11 to slide and is connected to a first transmission component 21 or a second transmission component 22, enabling the central turntable 33 to rotate continuously along a first direction. Therefore, when the oscillating member 11 switches its oscillation direction, the central turntable 33 does not need to reduce its rotational speed to zero, nor does it need to switch its rotational direction, effectively avoiding energy loss during bidirectional oscillation. Even at low oscillation frequencies, the central turntable 33 can still maintain a high rotational speed, thereby improving energy utilization and ensuring that the bidirectional oscillating electromagnetic energy harvester 100 can maintain a stable current output under reciprocating oscillation input, improving energy harvesting efficiency and achieving energy harvesting under wide-bandwidth, low-frequency, and small-amplitude oscillation.

[0028] Please see Figures 1 to 4 It is understandable that regardless of whether the swinging element 11 swings along the first direction or the second direction, the swinging element 11 drives the central turntable 33 to rotate along the first direction, thus achieving high sensitivity and being able to sense low-frequency, low-amplitude, and variable-amplitude mechanical swings. Ultimately, the bidirectional swinging electromagnetic energy harvester 100 has the advantages of wide response bandwidth, high sensitivity, high efficiency, and high cost-effectiveness. It can efficiently collect mechanical energy in swinging environments and provide a continuous and stable power supply for low-power electronic devices.

[0029] It is also understandable that the first direction can be clockwise and the second direction can be counterclockwise. Of course, the first direction can also be counterclockwise and the second direction can be clockwise. During the reversal process, the swing member 11 swings around the central axis 31 and slides along the axial direction of the central axis 31, thus performing a composite motion.

[0030] Optionally, in this embodiment, the magnet 34 is cylindrical and axially magnetized, and the cross-sectional shape of the positioning through hole is circular. The magnet 34 can be installed in the positioning through hole by interference fit. The central axis of the magnet 34 is parallel to the central axis of the coil 32.

[0031] Please see Figures 1 to 4Optionally, the number of magnets 34 is six. These six magnets 34 are arranged at equal intervals around the central axis 31 on the central rotating disk 33, with the north and south poles alternating. That is, each side of the central rotating disk 33 has three south poles and three north poles, thereby increasing the variation of magnetic flux in the coils 32. Alternatively, the number of coils 32 is eight, with four coils 32 on each side of the central rotating disk 33. Along a predetermined direction, the four coils 32 on one side are respectively positioned opposite the four magnets 34, meaning the central axis of the coil 32 coincides with the central axis of the corresponding magnet 34. This not only makes efficient use of space but also increases the variation of magnetic flux in the coils 32.

[0032] It is also understandable that a magnet 34 and a coil 32 can be simultaneously placed on the central turntable 33, and a magnet 34 and a coil 32 can also be placed outside the central turntable 33, thereby forming a complex magnetic field to increase the rate of change of magnetic flux in the coil 32 per unit time.

[0033] Please see Figures 1 to 4 In some embodiments, the reversing member 12 has a guide through hole 123, and the swing member 11 includes an engaging part 111, a swing rod 113 that connects to the engaging part 111 and passes through the guide through hole 123, and a guide part 112 that is located in the guide through hole 123 and connected to the swing rod 113. The guide through hole 123 is used to guide the guide part 112 to slide in a predetermined direction so that the engaging part 111 is connected to the first transmission assembly 21 or the second transmission assembly 22.

[0034] Please see Figures 1 to 4Optionally, the cross-sectional shape of the guide hole 123 is approximately a parallelogram, and the shape of the guide portion 112 is adapted to the shape of the guide hole 123. The external mechanical swing excites the swing rod 113, and the swing rod 113 drives the engagement portion 111 to swing, thereby transmitting power to the first transmission assembly 21 or the second transmission assembly 22 through the engagement portion 111. Understandably, when the swing rod 113 swings along the first direction, the guide hole 123 guides the guide part 112 to slide toward the first transmission assembly 21, so that the engaging part 111 engages with the first transmission assembly 21, thereby transmitting the swing of the engaging part 111 along the first direction to the central turntable 33 through the first transmission assembly 21; when the swing rod 113 swings along the second direction, the guide hole 123 guides the guide part 112 to slide toward the second transmission assembly 22, so that the engaging part 111 engages with the second transmission assembly 22, thereby transmitting the swing of the engaging part 111 along the second direction to the central turntable 33 through the second transmission assembly 22, ultimately ensuring that the central turntable 33 always maintains rotation along the first direction. In this way, not only is the accuracy and reliability of the transmission connection improved, and the mechanical impact and wear of the central turntable 33 during reversal reduced, but the energy transmission path is also optimized, ensuring that the swing energy can be efficiently and smoothly converted into the kinetic energy of the unidirectional rotation of the central turntable 33, thus improving the energy capture efficiency.

[0035] Please see Figures 1 to 4 In some embodiments, the two opposite walls of the guide through hole 123 are provided with first guide surfaces 124. The two first guide surfaces 124 are parallel and have an angle with a predetermined direction, the angle of which can be in the range of 30 to 60 degrees. The angle can be represented as α, and the angle α is greater than the friction angle between the guide part 112 and the reversing part 121, so that the guide part 112 can slide smoothly. The two opposite surfaces of the guide part 112 are respectively provided with two second guide surfaces 114, and the two second guide surfaces 114 slide in contact with the two first guide surfaces 124.

[0036] Please see Figures 1 to 4 Optionally, by sliding the two first guide surfaces 124 into the two second guide surfaces 114 respectively, the swing member 11 can slide along the axial direction of the central rotating shaft 31, reducing the frictional resistance during the sliding motion and improving the smoothness and reliability of the reversing process.

[0037] Please see Figures 1 to 4 In some embodiments, guide limiting grooves 125 are provided on the opposite sides of the guide through hole 123, and the two first guide surfaces 124 are respectively located at the bottom of the two guide limiting grooves 125. The two sides of the guide part 112 are respectively slidably disposed in the two guide limiting grooves 125.

[0038] Please see Figures 1 to 4Optionally, the guide limiting groove 125 provides additional support and guidance for the guide part 112, which can keep the radial position of the meshing part 111 relative to the central turntable 33 stable, enable the meshing part 111 to reciprocate stably around the central rotating shaft 31, and prevent the guide part 112 from jumping radially along the central turntable 33 during the swing and sliding process. This enhances the stability and reliability of the swinging member 11 during the reversal process, and ensures the stable operation of the bidirectional swinging electromagnetic energy harvester 100 even under complex or unstable external swinging excitation conditions.

[0039] Please see Figures 5 to 6 Optionally, the bidirectional oscillating electromagnetic energy harvester 100 further includes a housing structure 40, which has a mounting cavity 41. A guide groove 42 communicating with the mounting cavity 41 is also formed on the side surface of the housing structure 40. The magnetic induction structure 30 and the transmission structure 20 are located within the mounting cavity 41, and the two ends of the central rotating shaft 31 are respectively connected to the bottom and top of the mounting cavity 41. The coil 32 is fixed within the mounting cavity 41 by a support column. Two limiting grooves 122 are formed on opposite sides of the commutator 12. The groove edges on both sides of the guide groove 42 are slidably inserted into the two limiting grooves 122, that is, the commutator 12 is slidably connected to the groove edges on both sides of the guide groove 42 through the two limiting grooves 122, thereby enabling the commutator 12 to oscillate reciprocally.

[0040] Please see Figures 5 to 6 Optionally, for ease of assembly and maintenance, the commutator 12 may include two commutator sections 121 connected together, with a wire through hole located in one of the commutator sections 121 and another part located in the other commutator section 121, two first guide surfaces 124 located in the two commutator sections 121 respectively, and two limiting grooves 122 located in the two commutator sections 121 respectively.

[0041] Optionally, the extension path of the limiting slide 122 is arc-shaped, and the guide part 112 has a certain curvature, so that the swing structure 10 as a whole can swing back and forth.

[0042] Please see Figures 6 to 8 In some embodiments, the transmission structure 20 further includes a ratchet assembly 23. Two ratchet assemblies 23 are provided, and the two sides of the central turntable 33 are respectively connected to the two ratchet assemblies 23. The two ratchet assemblies 23 are respectively connected to the first transmission assembly 21 and the second transmission assembly 22.

[0043] Please see Figures 6 to 8 Optionally, the first transmission component 21 drives the central turntable 33 to rotate in the first direction through the corresponding ratchet component 23, and the second transmission component 22 also drives the central turntable 33 to rotate in the first direction through the corresponding ratchet component 23, thereby realizing unidirectional and efficient energy output.

[0044] Please see Figures 6 to 8 In some embodiments, the ratchet assembly 23 includes a ratchet 233 connected to the central turntable 33, a central gear 231 rotatably connected to the central shaft 31, and a pawl 232 connected to the central gear 231; the free ends of the two pawls 232 respectively mesh with the two ratchet 233, and the first transmission assembly 21 and the second transmission assembly 22 respectively drive the two central gears 231.

[0045] Optionally, the central gear 231 can be rotatably connected to the central shaft 31 via a bearing, ensuring that the oscillating input can be effectively transmitted to the central turntable 33 through the unidirectional engagement of the pawl 232 and the ratchet 233, so that it can maintain unidirectional rotation.

[0046] Please see Figures 6 to 8 Optionally, the ratchet 233 has multiple transmission ratchet teeth 237, which are arranged circumferentially around the central rotating shaft 31. A ratchet groove 236 is formed between any two adjacent transmission ratchet teeth 237, and one end of the pawl 232 is engaged in one of the ratchet grooves 236. One side of the groove wall of the ratchet groove 236 is perpendicular to the surface of the central rotating disk 33, and the pawl 232 abuts against the vertical groove wall 234 and drives the central rotating disk 33 to rotate; the other side of the groove wall of the ratchet groove 236 is inclined, and the inclined groove wall 235 can guide the pawl 232 to slide out of the ratchet groove 236.

[0047] Please see Figures 6 to 8 In some embodiments, the pawl 232 is rotatably connected to the central gear 231, and the ratchet assembly 23 further includes an elastic element with elastic restoring force, with the two ends of the elastic element connected to the pawl 232 and the central gear 231 respectively; the elastic element is used to drive the pawl 232 to abut against the corresponding ratchet 233.

[0048] When one pawl 232 engages with the corresponding ratchet 233, the other pawl 232 disengages from the corresponding ratchet 233.

[0049] Please see Figures 6 to 8When the meshing part 111 engages with the first transmission assembly 21, the pawl 232 of the ratchet assembly 23 corresponding to the first transmission assembly 21 inserts into a ratchet groove 236 of the corresponding ratchet 233. The pawl 232 abuts against one of the vertical groove walls 234 and drives the central turntable 33 to rotate. At the same time, since the two ratchet wheels 233 are mirror images of the central turntable 33, during the rotation of the central turntable 33, the other pawl 232 corresponding to the second transmission assembly 22, guided by the inclined groove wall 235, continuously slides out of the ratchet groove 236, thereby driving the first transmission assembly 21. When the central turntable 33 rotates, the central turntable 33 will not drive the corresponding central gear 231 on the other side to rotate through the pawl 232 on the other side, nor will it drive the second transmission component 22 to move. That is, the transmission of the two pawls 232 does not affect each other. This not only ensures that the central turntable 33 rotates smoothly, but also prevents energy from being transferred to the central gear 231 and the second transmission component 22 on the other side, thus avoiding energy loss. At the same time, due to the reduced load, a lower oscillation amplitude can drive the central turntable 33 to rotate, which improves the sensitivity of the bidirectional oscillating electromagnetic energy harvester 100 to low frequencies and low amplitudes.

[0050] Similarly, when the meshing part 111 engages with the second transmission component 22, the principle is the same as when the meshing part 111 engages with the first transmission component 21. This can also reduce energy loss and improve energy capture efficiency and sensitivity, which will not be elaborated here.

[0051] Please see Figures 6 to 8 Optionally, the elastic element (not shown in the figure) is a tube spring. When the tube spring is in a compressed state, it tends to drive the pawl 232 to abut against the ratchet 233, so that the pawl 232 and the ratchet 233 are in close contact. That is, the tube spring has the function of a reset element. When the swinging element 11 changes direction, the corresponding tube spring can drive the corresponding pawl 232 to engage in the groove of the corresponding ratchet 233, so that the central turntable 33 can always maintain rotation in the first direction.

[0052] Optionally, the pawl 232 has a first abutting surface 238, and the surface of the central gear 231 facing the pawl 232 has a second abutting surface 239. The two ends of the elastic member abut and are fixed to the first abutting surface 238 and the second abutting surface 239 respectively, so that the free end of the pawl can be pushed by its own elastic deformation, so that the pawl 232 can tightly abut the transmission ratchet 237.

[0053] Please see Figures 6 to 8 In some embodiments, the first transmission assembly 21 includes a first toothed ratchet ring 211 rotatably disposed on one side of the central turntable 33 and used to engage the meshing part 111, and a first gear 212 located within the first toothed ratchet ring 211. The two ends of the first gear 212 respectively engage the first toothed ratchet ring 211 and the corresponding central gear 231.

[0054] Please see Figures 6 to 8 The second transmission assembly 22 includes a second toothed ratchet ring 221 rotatably disposed on the other side of the central turntable 33 and used to mesh with the meshing part 111, a second gear 222 located in the second toothed ratchet ring 221, and a reversing gear 223 located in the second toothed ratchet ring 221 and meshing with the corresponding central gear 231. The two ends of the second gear 222 mesh with the second toothed ratchet ring 221 and the reversing gear 223, respectively.

[0055] Please see Figures 6 to 8 Optionally, the first gear 212, the second gear 222, and the reversing gear 223 can all be rotatably mounted in the mounting cavity 41 via bearings. The first toothed ratchet ring 211 and the second toothed ratchet ring 221 are rotatably mounted in the mounting cavity 41. When the meshing part 111 drives the first toothed ratchet ring 211 to rotate, the first toothed ratchet ring 211 drives the first gear 212 to rotate, and the first gear 212 then drives the corresponding central gear 231 to rotate, thereby driving the central turntable 33 to rotate in the first direction. When the meshing part 111 disengages from the first toothed ratchet ring 211 and engages with and drives the second toothed ratchet ring 221 to rotate, the second toothed ratchet ring 221 drives the second gear 222 to rotate, and the second gear 222 then drives the reversing gear 223 to rotate. The reversing gear 223 drives the corresponding central gear 231 to rotate. Due to the reversing of the reversing gear 223, the central turntable 33 can be driven to continue rotating in the first direction, ensuring stable power generation of each coil 32.

[0056] Please see Figures 6 to 8 In some embodiments, the inner ring surface of the first toothed ratchet ring 211 is provided with a first internal tooth 215 for meshing with the first gear 212, and the ring surface of the first toothed ratchet ring 211 is provided with a first ratchet tooth 216 for meshing with the meshing part 111; the inner ring surface of the second toothed ratchet ring 221 is provided with a second internal tooth 225 for meshing with the second gear 222, and the ring surface of the second toothed ratchet ring 221 is provided with a second ratchet tooth 226 for meshing with the meshing part 111.

[0057] Optionally, the first toothed ratchet ring 211 and the second toothed ratchet ring 221 are respectively located close to the bottom and top of the mounting cavity 41, so that the central turntable 33 is located at the center of the mounting cavity 41, maintaining the smoothness of rotation.

[0058] Optionally, multiple first internal teeth 215 and multiple second internal teeth 225 are provided, with multiple first internal teeth 215 arranged circumferentially around the first tooth ratchet ring 211 and multiple second internal teeth 225 arranged circumferentially around the second tooth ratchet ring 221.

[0059] Please see Figures 6 to 8Optionally, multiple first ratchet teeth 216 and multiple second ratchet teeth 226 are also provided. Multiple first ratchet teeth 216 are arranged circumferentially around the first toothed ratchet ring 211, and multiple second ratchet teeth 226 are arranged circumferentially around the second toothed ratchet ring 221. Meshing teeth are provided on both sides of the meshing part 111, and the meshing part 111 meshes with the first toothed ratchet ring 211 or the second toothed ratchet ring 221 through the meshing teeth.

[0060] It is understandable that the sliding distance of the guide part 112 is relatively short. The short sliding distance allows the reversal of the swing member 11 to be completed almost instantaneously, thereby reducing mechanical impact and energy loss. The sliding distance can be in the range of 1~10mm, and the sliding distance of the guide part 112 is greater than the meshing clearance of the meshing part 111. The meshing clearance refers to the distance that the guide part 112 moves in the X direction when the meshing part 111 disengages from the first toothed ratchet ring 211 and moves to engage with the second toothed ratchet ring 221. That is, after the guide part 112 slides into place, the meshing part 111 can engage the first toothed ratchet ring 211 or the second toothed ratchet ring 221.

[0061] This invention constructs a conversion and frequency upscaling system, and makes the movement of the magnet 34 a unidirectional rotation, converting the oscillation energy in the environment into the rotational kinetic energy of the rotor magnet 34, which is then output as electrical energy through the coil 32. The unidirectional rotation of the central turntable 33 results in almost no energy loss during commutation, making it suitable for small devices. Furthermore, the bidirectional oscillating electromagnetic energy harvester 100 has high power generation efficiency, meeting the power requirements of low-power devices. It also has good low-frequency adaptability, effectively harvesting low-frequency vibration energy, and its structural size can be miniaturized after frequency upscaling. Therefore, this application provides a highly efficient low-frequency energy harvester, expands the operating frequency bandwidth, simplifies the structure of the energy harvester, and makes it suitable for low-frequency vibration responses.

[0062] Please see Figures 6 to 8 The present invention also proposes an electronic device, which includes a bidirectional oscillating electromagnetic energy trap 100. The specific structure of the bidirectional oscillating electromagnetic energy trap 100 is as described in the above embodiments. Since the present electronic device adopts all the technical solutions of all the above embodiments, it also has all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0063] Optionally, embodiments of this application provide an innovative and sustainable self-powered solution for electronic devices. By utilizing vibration energy in the environment, electronic devices can break free from dependence on traditional batteries, achieving longer battery life, lower maintenance costs, and more environmentally friendly operation. This is particularly suitable for IoT devices, wearable devices, and sensors operating in harsh environments, greatly expanding the application scenarios and commercial value of these electronic devices.

[0064] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A bidirectional oscillating electromagnetic energy harvester, characterized in that, include: A magnetic structure includes a central rotating shaft, a central rotating disk rotatably connected to the central rotating shaft, a magnet for generating a magnetic field, and a coil located within the magnetic field, wherein the magnet and the coil are optionally connected to the central rotating disk; The transmission structure includes a first transmission assembly located on one side of the central turntable and a second transmission assembly located on the other side of the central turntable; as well as A swing structure is provided to swing around the central axis. The swing structure includes a reversing component and a swing component that is slidably disposed along a predetermined direction, the predetermined direction being along the axial direction of the central axis. When the swinging member swings along the first direction, the reversing member guides the swinging member to slide and is connected to the first transmission assembly to drive the central turntable to rotate along the first direction; when the swinging member swings along the second direction, the reversing member guides the swinging member to slide and is connected to the second transmission assembly to drive the central turntable to continue rotating along the first direction; the first direction is opposite to the second direction.

2. The bidirectional oscillating electromagnetic energy harvester as described in claim 1, characterized in that: The reversing component has a guide through hole, and the swing component includes an engaging part, a swing rod connected to the engaging part and passing through the guide through hole, and a guide part located in the guide through hole and connected to the swing rod. The guide through hole is used to guide the guide part to slide along the predetermined direction so that the engaging part is connected to the first transmission component or the second transmission component.

3. The bidirectional oscillating electromagnetic energy harvester as described in claim 2, characterized in that: The two walls of the guide through hole are provided with a first guide surface. The two first guide surfaces are parallel and have an angle with the predetermined direction. The two surfaces of the guide part that are opposite to each other are provided with two second guide surfaces. The two second guide surfaces are slidably engaged with the two first guide surfaces.

4. The bidirectional oscillating electromagnetic energy harvester as described in claim 3, characterized in that: The two sides of the guide through hole are provided with guide limiting grooves, and the two first guide surfaces are respectively located at the bottom of the two guide limiting grooves. The two sides of the guide part are respectively slidably disposed in the two guide limiting grooves.

5. The bidirectional oscillating electromagnetic energy harvester as described in any one of claims 2-4, characterized in that: The transmission structure also includes ratchet assemblies, two of which are provided. The two ratchet assemblies are respectively connected to the two sides of the central turntable, and the two ratchet assemblies are respectively connected to the first transmission assembly and the second transmission assembly.

6. The bidirectional oscillating electromagnetic energy harvester as described in claim 5, characterized in that: The ratchet assembly includes a ratchet connected to the central turntable, a central gear rotatably connected to the central shaft, and a pawl connected to the central gear; the free ends of the two pawls respectively engage the two ratchets, and the first transmission assembly and the second transmission assembly respectively drive the two central gears.

7. The bidirectional oscillating electromagnetic energy harvester as described in claim 6, characterized in that: The pawl is rotatably connected to the central gear, and the ratchet assembly further includes an elastic element with elastic restoring force. The two ends of the elastic element are respectively connected to the pawl and the central gear. The elastic element is used to drive the pawl to abut against the corresponding ratchet. When one pawl engages the corresponding ratchet, the other pawl disengages from the corresponding ratchet.

8. The bidirectional oscillating electromagnetic energy harvester as described in claim 6, characterized in that: The first transmission assembly includes a first toothed ratchet ring rotatably disposed on one side of the central turntable and used to engage the meshing portion, and a first gear located within the first toothed ratchet ring. The two ends of the first gear respectively engage the first toothed ratchet ring and the corresponding central gear. The second transmission assembly includes a second toothed ratchet ring rotatably disposed on the other side of the central turntable and used to engage the meshing portion, a second gear located within the second toothed ratchet ring, and a reversing gear located within the second toothed ratchet ring and engaging the corresponding central gear. The two ends of the second gear respectively engage the second toothed ratchet ring and the reversing gear.

9. The bidirectional oscillating electromagnetic energy harvester as described in claim 8, characterized in that: The first toothed ratchet ring has a first internal tooth on its inner ring surface for engaging the first gear, and a first ratchet tooth on its ring surface for engaging the meshing portion; the second toothed ratchet ring has a second internal tooth on its inner ring surface for engaging the second gear, and a second ratchet tooth on its ring surface for engaging the meshing portion.

10. An electronic device, characterized in that, The device includes a bidirectional oscillating electromagnetic energy harvester as described in any one of claims 1-9, wherein the bidirectional oscillating electromagnetic energy harvester further includes a housing structure, and the magnetic induction structure and the transmission structure are located within the housing structure.

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