Vibration power generation device

Abstract

The vibration power generation device comprises a cylinder and a magnetic body, a coil is wound around the outside of the cylinder, the interior of the cylinder is a closed space, a first end face and a second end face which are opposite to each other are arranged in the cylinder, and the first end face is made of amorphous metal; the magnetic body is located in the cylinder body, the magnetic body comprises a first magnet body, the magnetic body reciprocates between the first end face and the second end face under the action of external vibration, and then induced electromotive force is generated in a coil wound around the outer portion of the cylinder body. The first curved surface is arranged on the surface, in contact with the first end surface, of the magnetic body, and the first curved surface is in point contact with the first end surface. According to the vibration power generation device, the first curved surface and the first end face are designed to be in point contact when colliding, meanwhile, the first end face is made of the amorphous metal, the energy loss of the magnetic body in the collision and rebounding process of the first end face is reduced, and the energy utilization rate of the vibration power generation device is increased.

Description

Technical Field

[0001] The present application relates to the field of vibration power generation, and in particular to a vibration power generation device. Background Art

[0002] Vibration power generation devices, also known as vibration energy harvesters (VEHs), are devices that convert environmental vibration energy into electrical energy. Their working principle is: by capturing vibrations in the environment, using a capture mechanism composed of a mass block and an elastic element to amplify these vibrations, and converting the mechanical energy of the vibration into electrical energy through a conversion mechanism (such as electromagnetic induction or piezoelectric effect), and finally outputting it through an external circuit to provide power for electronic devices.

[0003] The prior art has certain defects in the design of vibration power generation devices, especially in terms of energy utilization efficiency. According to the technology disclosed in patent CN108370209A, although the device can convert the vibration generated by the rotation of the tire into electrical energy through the movable magnet and the fixed coil suspended by the spring, the movable magnet completely relies on the spring for suspension and movement, resulting in friction between the fixed magnet and the spring. This friction will significantly consume the elastic potential energy of the spring, thereby reducing the energy conversion efficiency, making the entire vibration power generation device inefficient in energy utilization. Summary of the invention

[0004] The present application aims to solve at least one of the above technical problems in the prior art to a certain extent. To this end, the first embodiment of the present application provides a vibration power generation device, which can improve the energy utilization rate of the vibration power generation device.

[0005] According to the first embodiment of the present application, the vibration power generation device includes:

[0006] A cylinder, a coil is wound around the outside of the cylinder, the inside of the cylinder is a closed space, a first end face and a second end face opposite to each other are arranged inside the cylinder, and the first end face is made of amorphous metal;

[0007] A magnetic body, the magnetic body is located inside the cylinder, the magnetic body is used to reciprocate between the first end surface and the second end surface under the action of external vibration, and the magnetic body includes a first magnet;

[0008] A first curved surface is provided on a surface of the magnetic body that contacts the first end surface, and the first curved surface is in point contact with the first end surface.

[0009] Based on the above technical scheme, the first embodiment of the present application has at least the following beneficial effects: the vibration power generation device provided by the present application includes a cylinder and a magnetic body, wherein a coil is wound around the outside of the cylinder, the inside of the cylinder is a closed space, a first end face and a second end face are arranged opposite to each other inside the cylinder, and the first end face is made of amorphous metal; the magnetic body is located inside the cylinder, and the magnetic body includes a first magnet, and the magnetic body reciprocates between the first end face and the second end face under the action of external vibration, thereby generating an induced electromotive force in the coil wound around the outside of the cylinder. The present application provides a first curved surface on the side of the magnetic body in contact with the first end face, and the first curved surface is in point contact with the first end face. In the present application, by designing the first curved surface to be in point contact with the first end face when colliding with the first end face, and the first end face is made of amorphous metal, the energy loss of the magnetic body in the process of collision and rebound with the first end face is reduced, and the energy utilization rate of the vibration power generation device is improved.

[0010] According to the vibration power generation device of the first embodiment of the present application, the second end face is made of amorphous metal or a second magnet, and the magnetism of the second magnet repels the magnetism of the first magnet.

[0011] According to the vibration power generation device of the first embodiment of the present application, a second curved surface is provided on a side of the magnetic body in contact with the second end surface, and the second curved surface is in point contact with the second end surface.

[0012] According to the vibration power generation device of the first embodiment of the present application, a collision portion is formed between the first curved surface and the first magnet.

[0013] According to the vibration power generation device of the first embodiment of the present application, the first magnet is located between the first curved surface and the second curved surface, and the second curved surface and the first magnet surround a collision portion.

[0014] According to the vibration power generation device of the first embodiment of the present application, the impact part is made of a hard material.

[0015] According to the vibration power generation device of the first embodiment of the present application, a gasket is provided between the first magnet and the impact part.

[0016] According to the vibration power generation device of the first embodiment of the present application, the interior of the cylinder is a vacuum enclosed space.

[0017] According to the vibration power generation device of the first embodiment of the present application, the cylinder is also provided with a first end cover and a second end cover, a gasket is provided between the first end cover and the first end surface, and a gasket is provided between the second end cover and the second end surface.

[0018] According to the vibration power generation device of the first embodiment of the present application, the magnetic body is spherical or shuttle-shaped.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A cross-sectional view of a vibration power generation device in an embodiment of the first aspect of the present application;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of a vibration power generation device in an embodiment of the first aspect of the present application;

[0023] Figure 3 This is a schematic diagram of the structure of the magnetic body in the embodiment of the second aspect of the present application;

[0024] Figure 4 A cross-sectional view of a vibration power generation device in an embodiment of the second aspect of the present application;

[0025] Figure 5 This is a schematic cross-sectional structure diagram of a vibration power generation device in an embodiment of the second aspect of the present application;

[0026] Figure 6 This is a schematic diagram of the structure of the magnetic body in the embodiment of the third aspect of the present application;

[0027] Figure 7 A cross-sectional view of a vibration power generation device in an embodiment of the third aspect of the present application;

[0028] Figure 8 This is a schematic cross-sectional structure diagram of a vibration power generation device in an embodiment of the third aspect of the present application;

[0029] Fig. 9 A cross-sectional view of a vibration power generation device in an embodiment of the fourth aspect of the present application;

[0030] Fig.10 It is a schematic cross-sectional structure diagram of a vibration power generation device in an embodiment of the fourth aspect of the present application;

[0031] Fig.11 A cross-sectional view of a vibration power generation device in an embodiment of the fifth aspect of the present application;

[0032] Fig.12 This is a schematic cross-sectional view of a vibration power generation device in an embodiment of the fifth aspect of the present application;

[0033] Fig.13 A cross-sectional view of a vibration power generation device in an embodiment of the sixth aspect of the present application;

[0034] Fig.14 It is a schematic cross-sectional structure diagram of a vibration power generation device in an embodiment of the sixth aspect of the present application;

[0035] Reference numerals:

[0036] The cylinder 100 , the first end surface 110 , the second end surface 120 , the second magnet 121 , the first end cover 130 , the second end cover 140 , the coil 200 , the magnetic body 300 , the first curved surface 310 , the second curved surface 320 , the impact part 330 , the first magnet 340 , and the gasket 400 . DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0040] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0042] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0043] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0044] refer to Figure 1 The first aspect of the present application provides a vibration power generation device that can improve the energy utilization rate of the vibration power generation device.

[0045] See also Figure 1 and Figure 2 The vibration power generation device includes a cylinder 100, a coil 200 and a magnetic body 300, wherein the cylinder 100 is a closed space, and a first end face 110 and a second end face 120 are provided inside the cylinder 100, and the first end face 110 is made of amorphous metal; the magnetic body 300 is located inside the cylinder 100, and the magnetic body 300 is used to reciprocate between the first end face 110 and the second end face 120 under the action of external vibration. A first curved surface 310 is provided on the side of the magnetic body 300 that contacts the first end face 110, and the first curved surface 310 is in point contact with the first end face 110.

[0046] It should be noted that the cylinder 100 is cylindrical, the first end face 110 and the second end face 120 are the upper and lower end faces inside the cylinder 100, and the interior of the cylinder 100 is a closed space. The magnetic body 300 is located inside the cylinder 100 and can reciprocate between the first end face 110 and the second end face 120 of the cylinder 100 under the action of external vibration.

[0047] Specifically, the magnetic body 300 moves under the action of external vibration. After hitting the first end face 110, it is rebounded by the first end face 110 and then moves toward the second end face 120. After hitting the second end face 120, it is rebounded by the second end face 120 and then continues to move toward the first end face 110. In this way, the external vibration is collected as the reciprocating motion of the magnetic body 300 between the first end face 110 and the second end face 120 inside the cylinder 100.

[0048] It is understandable that the external vibration can be various vibrations from daily activities and industrial processes, for example: walking, running, jumping and other actions can generate vibrations in wearable devices; cars, trains, airplanes, etc. will generate vibrations during operation; mechanical equipment such as machines, pumps, fans and compressors in factories will generate continuous vibrations during operation, etc. After the vibration power generation device is installed on the above-mentioned transportation tools, wearable devices or mechanical equipment, the vibration generated by the above-mentioned equipment can be used to drive the magnetic body 300 inside the cylinder 100 to move, providing driving force for the reciprocating motion of the magnetic body 300 between the first end face 110 and the second end face 120.

[0049] It can be understood that the principle of driving the power generation device in the present application is electromagnetic induction power generation. During the reciprocating motion of the magnetic body 300 in the cylinder 100, it makes continuous relative motion relative to the coil 200 wound around the outside of the cylinder 100. According to Faraday's law of electromagnetic induction, the relative motion of the magnetic body 300 relative to the coil 200 will generate an induced electromotive force (voltage) in the coil 200, thereby realizing the generation of electrical energy.

[0050] It should be noted that the first end face 110 in the present application is made of amorphous metal, which is also called metallic glass, and is a special metal material whose atomic arrangement does not have a long-range ordered crystal structure like traditional metals, but presents a glass-like irregular arrangement. Compared with other conventional materials, amorphous metal can better convert the kinetic energy of the magnetic body 300 into elastic potential energy when impacted, and then instantly convert it back into the kinetic energy of the magnetic body 300 to rebound.

[0051] It is understandable that during the reciprocating motion between the first end face 110 and the second end face 120 inside the cylinder 100, when the magnetic body 300 contacts the first end face 110 made of amorphous metal, it is quickly rebounded by the first end face 110, and after changing the direction of motion, it continues to hit the second end face 120. The present application reduces the kinetic energy loss during the contact between the magnetic body 300 and the first end face 110 by using amorphous metal to make the first end face 110, so that the magnetic body 300 continues to move toward the second end face 120 with higher kinetic energy, that is, at a higher speed after rebounding, and finally increases the frequency of the reciprocating motion of the magnetic body 300 in the cylinder 100.

[0052] In summary, the first end face 110 made of amorphous metal can, on the one hand, reduce the energy loss generated during the impact and rebound of the magnetic body 300, thereby improving the energy utilization rate of the vibration power generation device; on the other hand, it can increase the frequency of the reciprocating motion of the magnetic body 300 in the cylinder 100, thereby improving the power generation efficiency of the vibration power generation device.

[0053] Further, refer to Figure 1, the side of the magnetic body 300 in contact with the first end face 110 is the side of the magnetic body 300 that collides with the first end face 110 during the reciprocating motion of the magnetic body 300 in the cylinder 100. In the present application, a first curved surface 310 is provided on the side of the magnetic body 300 in contact with the first end face 110, and the first curved surface 310 is in point contact with the first end face 110. In the present application, by providing the first curved surface 310, the magnetic body 300 is in point contact with the first end face 110 when colliding with the first end face 110. Compared with surface contact, point contact can ensure that the stress of the magnetic body 300 is concentrated when rebounding, and the rebound is faster. At the same time, it can also further reduce the energy loss during the collision process, and improve the energy conversion rate in the process of converting the kinetic energy of the magnetic body 300 into the elastic potential energy of the first end face 110 and the elastic potential energy of the first end face 110 into the kinetic energy of the magnetic body 300.

[0054] Optionally, the first curved surface 310 is designed to be tangent to the first end face 110 when in contact with the first end face 110 to achieve point contact. It can be understood that the tangent state of the first curved surface 310 when in contact with the first end face 110 is an ideal shape. In actual processing, the first curved surface can also be designed to be other shapes to achieve point contact when colliding with the first end face 110.

[0055] It should be noted that amorphous metals usually exhibit higher strength, better toughness and better fatigue resistance than crystalline materials. Using amorphous metal as the material of the first end face 110 can meet the use requirements of high-frequency impact of the magnetic body 300 and extend the service life of the vibration power generation device.

[0056] The second end surface 120 is made of amorphous metal or a second magnet 121 , and the magnetism of the second magnet 121 repels the magnetism of the first magnet 340 .

[0057] Optionally, refer to Figure 1 and Figure 2 , the second end face 120 is made of amorphous metal, and a second curved surface 320 is provided on the side of the magnetic body 300 that contacts the second end face 120, and the second curved surface 320 is tangent to the second end face 120 when in contact. Similar to the collision process between the magnetic body 300 and the first end face 110, the magnetic body 300 is also in point contact with the second end face 120 when colliding with the second end face 120. Compared with surface contact, point contact can ensure that the stress of the magnetic body 300 is concentrated when rebounding, and the rebound is faster. At the same time, it can also further reduce the energy loss during the collision process, and improve the energy conversion rate of the process in which the kinetic energy of the magnetic body 300 is converted into the elastic potential energy of the second end face 120 and the elastic potential energy of the second end face 120 is converted into the kinetic energy of the magnetic body 300.

[0058] Optionally, refer to Figure 3The magnetic body 300 includes a first magnet 340, which is located between the first curved surface 310 and the second curved surface 320. The first curved surface 310 and the first magnet 340 surround and form a collision portion 330, and the second curved surface 320 and the second magnet 121 also surround and form a collision portion 330. It can be understood that the magnetic body 300 is a layered combination structure along the axial direction of the cylinder 100, the first magnet 340 is located in the middle layer, and both sides of the first magnet 340 are collision portions 330. The first curved surface 310 and the second curved surface 320 are the outer surfaces of the collision portions 330 on both sides that contact the first end surface 110 and the second end surface 120 respectively.

[0059] It can be understood that the magnetism of the magnetic body 300 is provided by the first magnet 340. During the reciprocating motion of the magnetic body 300 in the cylinder 100, the first magnet 340 moves relative to the coil 200 wound outside the cylinder 100, thereby generating an induced electromotive force (voltage) in the coil 200. The induced electromotive force drives the flow of electrons to form an electric current, thereby generating electrical energy.

[0060] It is understandable that the impact part 330 can be made of non-magnetic material and used for contacting and colliding with the first end face 110 and the second end face 120 to realize the movement steering of the magnetic body 300 by rebounding. Optionally, the impact part 330 is made of hard material with good wear resistance to meet the use requirements of high-frequency collision between the impact part 330 and the first end face 110 and the second end face 120, thereby extending the service life of the vibration power generation device.

[0061] As an example, refer to Figure 1 and Figure 2 , the magnetic body 300 is designed to be spherical, and at this time, the first curved surface 310 and the second curved surface 320 are hemispherical surfaces of the magnetic body 300. When the magnetic body 300 contacts and collides with the first end surface 110 and the second end surface 120, the first curved surface 310 is tangent to and point-contacts with the first end surface 110, and the second curved surface 320 is tangent to and point-contacts with the second end surface 120. Through the point contact cooperation of the spherical surface and the amorphous metal, the kinetic energy loss of the magnetic body 300 during collision and rebound is small, and more kinetic energy is used to convert into electrical energy, thereby improving the energy utilization rate of the vibration power generation device.

[0062] As an example, refer to Figure 4 and Figure 5 , the magnetic body 300 is designed to be shuttle-shaped, in which case the first curved surface 310 and the second curved surface 320 are both arc surfaces, and the first magnet 340 is a rectangular parallelepiped located in the middle layer of the magnetic body 300. Similar to the spherical magnetic body 300, the shuttle-shaped magnetic body 300 uses the arc surface and the point contact of the amorphous metal to make the kinetic energy loss of the magnetic body 300 smaller during collision rebound, and more kinetic energy is used to convert into electrical energy, thereby improving the energy utilization rate of the vibration power generation device.

[0063] Optionally, refer to Figures 6 to 12 The magnetic body 300 can also be designed to be similar to a flying saucer or other extended shapes. It can be understood that, under the premise of ensuring that the first curved surface 310 is tangent to the first end surface 110 when in contact and the second curved surface 320 is tangent to the second end surface 120 when in contact, the first curved surface 310 and the second curved surface 320 can be designed to be any shape, and this application does not give examples one by one here.

[0064] refer to Fig.13 and Fig.14 Optionally, the second end face 120 is made of a second magnet 121, the magnetism of the first magnet 340 repels the magnetism of the second magnet 121, and the first magnet 340 is arranged at the end of the magnetic body 300 that contacts the second end face 120. It can be understood that when the magnetic body 300 approaches the second end face 120, it is repelled by the second magnet 121 of the second end face 120, and then changes the direction of movement and moves toward the direction of the first end face 110. In this way, the magnetic body 300 completes the turn at the second end face 120 by the repulsive magnetism of the first magnet 340 and the second magnet 121, and completes the turn at the first end face 110 by collision.

[0065] It is understandable that when the second end face 120 is made of the second magnet 121, the magnetic body 300 has completed the turning before contacting the second end face 120. At this time, the magnetic body 300 will not collide with the second end face 120. Therefore, there is no restriction on the material of the second end face 120. The second end face 120 can be made of amorphous metal or other materials.

[0066] Further, refer to Fig.13 and Fig.14 When the second end face 120 is made of the second magnet 121 , the magnetic body 300 is provided with a first magnet 340 at one end in contact with the second end face 120 , and a first curved surface 310 is still provided at the other end in contact with the first end face 110 . The first curved surface 310 and the first magnet 340 surround and form a collision portion 330 .

[0067] It is understandable that the impact part 330 can be made of non-magnetic materials. Optionally, the impact part 330 is made of hard materials with good wear resistance, which meets the high-frequency impact requirements of the impact part 330 and the first end face 110 and the second end face 120, thereby extending the service life of the vibration power generation device.

[0068] It should be noted that when the first end face 110 and the second end face 120 are both made of the second magnet 121, the magnetic body 300 at the first end face 110 and the second end face 120 realizes movement and steering by the magnetic pole repulsion of the first magnet 340 and the second magnet 121. This arrangement has certain requirements on the axial distance of the cylinder 100. When the axial dimension of the cylinder 100 is too small, the first magnet 340 may be subjected to the excessive magnetic pole repulsion of the second magnet 121 at both ends, thereby limiting the movable travel of the magnetic body 300 between the first end face 110 and the second end face 120. In short, when the first end face 110 and the second end face 120 are both made of the second magnet 121, it is not conducive to the miniaturization of the vibration power generation device. In the technical solution protected by the present application, at least the first end face 110 is limited to be made of amorphous metal, that is, at least the first end face 110 realizes the movement steering of the magnetic body 300 through high-elastic impact. Compared with the solution in which both the first end face 110 and the second end face 120 are made of the second magnet 121, the present application can further reduce the axial size of the cylinder 100, which is conducive to the miniaturization of the overall vibration power generation device.

[0069] Optionally, the enclosed space inside the cylinder 100 is a vacuum enclosed space. By removing the air in the enclosed space to achieve a vacuum, the friction resistance of the magnetic body 300 during the movement of the cylinder 100 can be reduced, thereby further reducing energy loss and improving the energy utilization rate of the vibration power generation device.

[0070] Optionally, refer to Figures 1 to 14 The cylinder 100 further includes a first end cover 130 and a second end cover 140, which are respectively located at the two ends of the cylinder 100 in the axial direction, and are used to seal the cylinder 100 to form a sealed space. The first end face 110 is in close contact with the inner surface of the first end cover 130 inside the cylinder 100, and the second end face 120 is in close contact with the inner surface of the second end cover 140 inside the cylinder 100. Optionally, a gasket 400 is provided between the first end cover 130 and the first end face 110, and a gasket 400 is provided between the second end cover 140 and the second end face 120. Optionally, the gasket 400 is a shock-absorbing gasket to prevent the magnetic body 300 from impacting the first end face 110 and the second end face 120 to damage the structure of the cylinder 100.

[0071] Optionally, refer to Figure 3 and Fig.13 A gasket 400 is provided between the first magnet 340 and the impact part 330 . The gasket 400 is a shock-absorbing gasket to prevent the magnetic body 300 from breaking during the violent reciprocating impact between the first end face 110 and the second end face 120 .

[0072] Optionally, the coil 200 is wrapped with sound-absorbing cotton, and the first end cover 130 and the second end cover 140 are also wrapped with sound-absorbing cotton. The sound-absorbing cotton can absorb the noise generated by the magnetic body 300 hitting the first end surface 110 and the second end surface 120, thereby reducing the noise generated when the vibration power generation device is working.

[0073] Optionally, the cylinder 100 is made of self-lubricating material, such as polytetrafluoroethylene, etc., to further reduce the friction resistance of the reciprocating motion of the magnetic body 300 in the cylinder 100 and reduce energy loss.

[0074] In summary, the vibration power generation device provided by the present application has the following beneficial effects:

[0075] (1) In the present application, at least the first end surface 110 in the cylinder 100 is made of amorphous metal. The amorphous metal has a small kinetic energy loss when it collides with the magnetic body 300 and rebounds, thereby reducing energy loss and improving the energy utilization rate of the vibration power generation device.

[0076] (2) The present application requires a small driving force to trigger the reciprocating motion of the magnetic body 300 in the cylinder 100, and does not have high requirements on the axial size of the cylinder 100. It can be applied to a variety of scenarios where the volume of the vibration power generation device is limited or the vibration source does not have strong vibration characteristics, such as daily walking or swinging the wrist or arm.

[0077] (3) The present invention has no complex mechanical units and does not include springs, so the structure has high reliability and is relatively simple to maintain.

[0078] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A vibration power generation device, characterized in that: include: A cylinder, a coil is wound around the outside of the cylinder, the inside of the cylinder is a closed space, a first end face and a second end face opposite to each other are arranged inside the cylinder, and the first end face is made of amorphous metal; A magnetic body, the magnetic body is located inside the cylinder, the magnetic body is used to reciprocate between the first end surface and the second end surface under the action of external vibration, and the magnetic body includes a first magnet; A first curved surface is provided on a surface of the magnetic body that contacts the first end surface, and the first curved surface is in point contact with the first end surface.

2. The vibration power generation device according to claim 1, characterized in that: The second end surface is made of amorphous metal or a second magnet, and the magnetism of the second magnet repels the magnetism of the first magnet.

3. The vibration power generation device according to claim 2, characterized in that: A second curved surface is provided on a surface of the magnetic body that contacts the second end surface, and the second curved surface is in point contact with the second end surface.

4. The vibration power generation device according to claim 1, characterized in that: A collision portion is formed between the first curved surface and the first magnet.

5. The vibration power generation device according to claim 3, characterized in that: The first magnet is located between the first curved surface and the second curved surface, and a collision portion is formed between the second curved surface and the first magnet.

6. The vibration power generation device according to claim 4 or 5, characterized in that: The impact part is made of hard material.

7. The vibration power generation device according to claim 4 or 5, characterized in that: A gasket is provided between the first magnet and the impact portion.

8. The vibration power generation device according to claim 1, characterized in that: The interior of the cylinder is a vacuum closed space.

9. The vibration power generation device according to claim 1, characterized in that: The cylinder is further provided with a first end cover and a second end cover, a gasket is provided between the first end cover and the first end surface, and a gasket is provided between the second end cover and the second end surface.

10. The vibration power generation device according to claim 1, characterized in that: The magnetic body is spherical or shuttle-shaped.

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