Vibration energy collecting device and micro electronic equipment

Abstract

The invention discloses a vibration energy collecting device which comprises a mandrel, a first magnetic part, a second magnetic part, a coil and a third magnetic part, the first magnetic part and the second magnetic part are arranged at the two ends of the mandrel respectively, and at least part of the first magnetic part and at least part of the second magnetic part are both located outside the peripheral face of the mandrel; the coil surrounds the mandrel and is arranged between the first magnetic piece and the second magnetic piece; a third magnetic part is arranged between the first magnetic part and the second magnetic part, the third magnetic part and the first magnetic part repel each other, the third magnetic part and the second magnetic part repel each other, and the third magnetic part is arranged on the peripheral face of the mandrel in a sliding and sleeving mode. The vibration energy collecting device can collect vibration energy for power generation and is applied to the technical field of vibration energy recovery.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration energy recovery, and in particular to a vibration energy collection device and a microelectronic device. Background Art

[0002] Most micro wireless sensors are powered by batteries. Limited by their size, they are usually powered by button batteries. However, button batteries have limited capacity and are inconvenient to replace. Therefore, micro wireless sensors can only work intermittently and cannot work continuously at high frequency. The sensing information cannot be sensed and fed back immediately. If the battery is too large, the miniaturization of the wireless sensor cannot be achieved. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a vibration energy collection device that can collect vibration energy to generate electricity.

[0004] A microelectronic device having the vibration energy harvesting device is also proposed.

[0005] A vibration energy harvesting device according to an embodiment of the first aspect of the present invention comprises: Mandrel; A first magnetic member and a second magnetic member are respectively disposed at two ends of the core shaft, and at least a portion of the first magnetic member and at least a portion of the second magnetic member are both located outside the outer circumference of the core shaft; A coil, which surrounds the core shaft and is disposed between the first magnetic member and the second magnetic member; The third magnetic component is arranged between the first magnetic component and the second magnetic component. The third magnetic component repels the first magnetic component and the second magnetic component. The third magnetic component is slidably sleeved on the outer peripheral surface of the core shaft.

[0006] The vibration energy collection device according to the first aspect of the embodiment of the present invention has at least the following beneficial effects: when applied to a vibration scenario, the third magnetic component reciprocates between the first magnetic component and the second magnetic component along the axial direction of the core shaft. At this time, the coil cuts the magnetic flux lines of the third magnetic component and generates current to achieve vibration power generation.

[0007] According to some embodiments of the present invention, the first magnetic member and / or the second magnetic member are detachably connected to the end of the core shaft.

[0008] According to some embodiments of the present invention, the first magnetic member is sleeved on the core shaft, and the core shaft includes a main shaft portion and a first limiting portion connected to one end of the main shaft portion, at least a portion of the first limiting portion is located outside the outer circumferential surface of the main shaft portion, and stops the first magnetic member from moving away from one end of the second magnetic member.

[0009] According to some embodiments of the present invention, the first limiting portion and the main shaft portion are connected to form an integral structure.

[0010] According to some embodiments of the present invention, the first limiting portion is detachably connected to the main shaft portion.

[0011] According to some embodiments of the present invention, a limiting hole is provided on the outer circumference of the main shaft portion, the first limiting portion comprises a connecting portion and a stopping limiting portion, the connecting portion is detachably connected to the limiting hole, the stopping limiting portion is located outside the outer circumference of the main shaft portion, and stops one end of the first magnetic member from being away from the second magnetic member; Alternatively, the outer circumferential surface of the main shaft portion is provided with an annular groove along the circumference of the main shaft portion, the first limiting portion is annularly clamped in the annular groove, a portion of the first limiting portion is located outside the outer circumferential surface of the main shaft portion, and stops the first magnetic part from moving away from one end of the second magnetic part.

[0012] According to some embodiments of the present invention, the first magnetic member and / or the second magnetic member are connected to the core shaft as an integral structure.

[0013] According to some embodiments of the present invention, the coil is arranged outside the third magnetic member along the radial direction of the core shaft.

[0014] According to some embodiments of the present invention, the coil includes a coil layer and a solidification layer connected to the coil layer, and the solidification layer is used to fix the coil layer.

[0015] According to some embodiments of the present invention, the solidified layer includes a first layer and a second layer, the first layer, the coil layer and the second layer are sequentially distributed along the radial direction of the core shaft, and the first layer and the second layer clamp and fix the coil layer; Alternatively, the solidified layer and the coil layer are connected to form an integral structure.

[0016] According to some embodiments of the present invention, the coil is connected to the first magnetic member and / or the second magnetic member as an integrated structure.

[0017] According to some embodiments of the present invention, the coil resin is cured on the first magnetic member and / or the second magnetic member.

[0018] According to some embodiments of the present invention, the diameter of the mandrel is Φ, the thickness of the mandrel is h, and the mandrel satisfies: 0mm<Φ≤20mm, 0mm<h≤40mm.

[0019] According to some embodiments of the present invention, the third magnetic component includes a magnetic ring body and a sliding auxiliary component provided on the inner circumference of the magnetic ring body, and the sliding auxiliary component is slidably connected to the outer circumference of the core shaft.

[0020] According to some embodiments of the present invention, the core shaft is a non-ferromagnetic material.

[0021] The microelectronic device according to the second aspect of the embodiment of the present invention includes: the vibration energy harvesting device described in the first aspect of the embodiment.

[0022] The microelectronic device according to the embodiment of the second aspect of the present invention has at least the following beneficial effects: the microelectronic device can obtain continuous electrical energy through vibration, so that the microelectronic device can work efficiently for a long time in a vibration environment, thereby improving the battery life of the microelectronic device.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a schematic structural diagram of a vibration energy harvesting device according to an embodiment of the present invention.

[0025] Figure Number: Mandrel 100; main shaft portion 110; first limiting portion 120; second limiting portion 130; A first magnetic member 200; A second magnetic member 300; Coil 400; The third magnetic member 500 . DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "a number" refers to one or more than one, and "a plurality" refers to two or more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] With the development of automobile electronics and intelligence, smart tires have become an important part of the vehicle control system that affects the safety and comfort of vehicle driving, and can provide data information for the control systems of users inside and outside the vehicle. Based on the usage scenarios of smart tires, smart tires are generally equipped with micro wireless sensors, and the relevant information of the tires is transmitted through micro wireless sensors. However, the micro wireless sensors can only work intermittently, not continuously at high frequency, and the sensor information cannot be sensed and fed back immediately, which restricts the development of smart tires.

[0031] Reference Figure 1 As shown, an embodiment of the first aspect of the present invention proposes a vibration energy collection device, including: a core shaft 100, a first magnetic component 200, a second magnetic component 300, a coil 400 and a third magnetic component 500, the first magnetic component 200 and the second magnetic component 300 are respectively arranged at both ends of the core shaft 100, at least a portion of the first magnetic component 200 and at least a portion of the second magnetic component 300 are both located outside the outer circumferential surface of the core shaft 100; the coil 400 surrounds the core shaft 100 and is arranged between the first magnetic component 200 and the second magnetic component 300; the third magnetic component 500 is arranged between the first magnetic component 200 and the second magnetic component 300, the third magnetic component 500 repels the first magnetic component 200 and the second magnetic component 300, and the third magnetic component 500 is slidably sleeved on the outer circumferential surface of the core shaft 100.

[0032] In this embodiment, the core shaft 100 is cylindrical, and the outer circumferential surface of the core shaft 100 is a circular surface, which makes it easier for the third magnetic component 500 to slide on the outer circumferential surface of the core shaft 100 along the axial direction of the core shaft 100. In other embodiments, the core shaft 100 may also be a triangular prism, a rectangular prism, or other polygonal prism or an elliptical prism.

[0033] The first magnetic member 200 is in the shape of a disk, and the axis of the first magnetic member 200 is substantially coincident with the axis of the core shaft 100, so that the first magnetic member 200 has an annular portion that exceeds the outer circumference of the core shaft 100. The first magnetic member 200 may also be in the shape of a rectangular disk or other polygonal disks or elliptical disks. When the first magnetic member 200 is in the shape of a rectangular disk and is disposed at one end of the cylindrical core shaft 100, the four corners of the rectangle in the first magnetic member 200 exceed the outer circumference of the core shaft 100. In other embodiments, the first magnetic member 200 may also be in the shape of a ring and sleeved on the outer circumference of the core shaft 100, or the first magnetic member 200 may include a plurality of magnetic components, and the magnetic components are sequentially distributed along the circumference of the core shaft 100.

[0034] The second magnetic member 300 is substantially the same in shape as the first magnetic member 200. Both the first magnetic member 200 and the second magnetic member 300 are disc-shaped and have substantially the same size. Of course, the sizes of the two may also be different. In other embodiments, the second magnetic member 300 may also be different in shape from the first magnetic member 200. For example, the first magnetic member 200 is disc-shaped and the second magnetic member 300 is rectangular disc-shaped. The specific shapes of the first magnetic member 200 and the second magnetic member 300 may be selected according to actual needs, and the present invention does not limit their specific shapes.

[0035] The coil 400 is formed by spirally winding a conducting wire, and the coil 400 forms a helical body and surrounds the core shaft 100. In other embodiments, the coil 400 can be formed by winding in other ways, and the coil 400 only needs to surround the core shaft 100.

[0036] In addition, when the vibration energy collection device also includes other structures such as a shell, the core shaft 100 is installed inside the shell, the first magnetic component 200 and the second magnetic component 300 can be connected to the shell and are respectively located at both ends of the core shaft 100, and the coil 400 can be connected to the shell and surround the core shaft 100.

[0037] The third magnetic component 500 is annularly slidably sleeved on the outer peripheral surface of the core shaft 100 to slide along the axial direction of the core shaft 100. The third magnetic component 500 and the first magnetic component 200 and the second magnetic component 300 repel each other, so that the third magnetic component 500 is suspended between the first magnetic component 200 and the second magnetic component 300 and is in a force balance state. When affected by an external force along the axial direction of the core shaft 100, the force balance is broken, so that the third magnetic component 500 reciprocates along the axial direction of the core shaft 100, and when the external force disappears, the third magnetic component 500 will gradually restore the force balance state. In the process of the third magnetic component 500 reciprocating along the axial direction of the core shaft 100, when the third magnetic component 500 moves axially along the core shaft 100, the magnetic flux of the third magnetic component 500 will move relative to the coil 400, so that the coil 400 cuts the magnetic flux and generates an induced current, thereby realizing the induction of electricity by the coil 400. In other words, when the vibration energy collection device is applied to a vibration scenario, the third magnetic component 500 moves back and forth between the first magnetic component 200 and the second magnetic component 300 axially along the core shaft 100, and the coil 400 cuts the magnetic flux lines of the third magnetic component 500 and generates current to achieve vibration power generation.

[0038] Specifically, the magnetism of the opposite ends of the first magnetic component 200 and the third magnetic component 500 is the same, and the magnetism of the opposite ends of the second magnetic component 300 and the third magnetic component 500 is the same. For example, the magnetism of the opposite ends of the first magnetic component 200 and the third magnetic component 500 is both N pole, and the magnetism of the opposite ends of the second magnetic component 300 and the third magnetic component 500 is both S pole, or the magnetism of the opposite ends of the first magnetic component 200 and the third magnetic component 500 is both S pole, and the magnetism of the opposite ends of the second magnetic component 300 and the third magnetic component 500 is both N pole.

[0039] Reference Figure 1 As shown, in some embodiments of the present invention, the first magnetic member 200 and / or the second magnetic member 300 are detachably connected to the end of the core shaft 100 to facilitate maintenance of the vibration energy harvesting device during its use. When parts are damaged, the first magnetic member 200 or the second magnetic member 300 is disassembled, and then the third magnetic member 500, the core shaft 100 and the coil 400 are disassembled to replace the first magnetic member 200, the second magnetic member 300, the third magnetic member 500, the core shaft 100 or the coil 400, thereby saving maintenance costs.

[0040] Reference Figure 1 As shown, in some specific embodiments of the present invention, the first magnetic member 200 is sleeved on the core shaft 100, and the core shaft 100 includes a main shaft portion 110 and a first limiting portion 120 connected to one end of the main shaft portion 110, at least a portion of the first limiting portion 120 is located outside the outer circumferential surface of the main shaft portion 110, and stops the first magnetic member 200 from moving away from one end of the second magnetic member 300.

[0041] It is worth understanding that the first magnetic component 200 is stopped by the first limiting portion 120 to limit the end of the first magnetic component 200 away from the second magnetic component 300 from escaping from the main shaft portion 110, and the end of the first magnetic component 200 facing the second magnetic component 300 repel each other with the second magnetic component 300. The first magnetic component 200 is affected by the repulsive force and will continue to abut against the first limiting portion 120, so that the first magnetic component 200 is in a force balance state, thereby achieving the fixation of the first magnetic component 200.

[0042] In addition, the second magnetic component 300 is sleeved on the core shaft 100, and the core shaft 100 also includes a second limiting portion 130 connected to the other end of the main shaft portion 110. At least a portion of the second limiting portion 130 is located outside the outer circumferential surface of the main shaft portion 110, and stops the second magnetic component 300 from moving away from one end of the first magnetic component 200. The second magnetic component 300 is continuously abutted against the second limiting portion 130 through mutual repulsion, so that the second magnetic component 300 can also be in a force balance state, thereby achieving the fixation of the second magnetic component 300.

[0043] Reference Figure 1 As shown, in some embodiments of the present invention, the first limit portion 120 and the main shaft portion 110 are connected as an integral structure, so that the first limit portion 120 and the main shaft portion 110 do not need to be assembled, saving assembly process and improving assembly efficiency.

[0044] In this embodiment, the first position-limiting portion 120 can be integrally formed with the main shaft portion 110. Generally speaking, the integrally formed first position-limiting portion 120 can be regarded as being entirely located outside the outer circumference of the main shaft portion 110 and connected to the outer circumference of the main shaft portion 110. In other embodiments, the first position-limiting portion 120 can also be integrally connected to the main shaft portion 110 by welding, bonding, etc. When the connection position is located on the outer circumference of the main shaft portion 110, the first position-limiting portion 120 can be regarded as being entirely located outside the outer circumference of the main shaft portion 110. When the connection position is located on the end face of the main shaft portion 110, part of the first position-limiting portion 120 is located outside the outer circumference of the main shaft portion 110.

[0045] In addition, the second limiting portion 130 can also be connected to the main shaft portion 110 as an integral structure. When the first limiting portion 120 and the second limiting portion 130 are both connected to the main shaft portion 110 as an integral structure, the first magnetic component 200 includes a plurality of magnetic components, a first semi-ring portion and a second semi-ring portion. The first semi-ring portion and the second semi-ring portion are spliced ​​into an integral ring portion and are sleeved on the core shaft 100. Some of the magnetic components are connected to the first semi-ring portion, and other parts of the magnetic components are connected to the second semi-ring portion. The structures of the second magnetic component 300 and the third magnetic component 500 are basically the same as those of the first magnetic component 200. The number and distribution of their magnetic components may be different, which will not be repeated here.

[0046] Reference Figure 1 As shown, in some embodiments of the present invention, the first limiter 120 is detachably connected to the main shaft 110, so that the first limiter 120 can be separated from the main shaft 110, and then the first magnetic member 200 and the third magnetic member 500 are disassembled, which is convenient for parts maintenance. In addition, the second limiter can also be detachably connected to the main shaft 110.

[0047] Reference Figure 1 As shown, in some specific embodiments of the present invention, a limiting hole is provided on the outer circumference of the main shaft portion 110, and the first limiting portion 120 includes a connecting portion and a stopping limiting portion, the connecting portion is detachably connected to the limiting hole, and the stopping limiting portion is located outside the outer circumference of the main shaft portion 110 and stops the first magnetic member 200 from moving away from one end of the second magnetic member 300; In this embodiment, the connection portion can be detachably connected to the limiting hole by a thread. Specifically, the first limiting portion 120 can be a bolt or a pin with a thread, and the inner circumference of the limiting hole has a thread and is a threaded hole.

[0048] Reference Figure 1 As shown, in some specific embodiments of the present invention, the outer circumferential surface of the main shaft portion 110 is provided with an annular groove along the circumference of the main shaft portion 110, and the first limiting portion 120 is annularly clamped in the annular groove. Part of the first limiting portion 120 is located outside the outer circumferential surface of the main shaft portion 110, and stops one end of the first magnetic component 200 away from the second magnetic component 300.

[0049] In this embodiment, the first limiting portion 120 is annular and clamped in the annular groove. Specifically, the first limiting portion 120 is a clamp.

[0050] Reference Figure 1 As shown, in some specific embodiments of the present invention, the first magnetic member 200 and / or the second magnetic member 300 are connected to the core shaft 100 as an integrated structure to save assembly process and improve assembly efficiency.

[0051] Specifically, the first magnetic component 200 and the second magnetic component 300 can be integrally formed with the core shaft 100, or connected as a whole by bonding or other methods.

[0052] Reference Figure 1 As shown, in some specific embodiments of the present invention, the coil 400 is disposed outside the third magnetic member 500 along the radial direction of the core shaft 100 .

[0053] Specifically, when the third magnetic member 500 moves along the axial direction of the core shaft 100 , the magnetic flux lines of the outer ring of the third magnetic member 500 are cut by the coil 400 .

[0054] As another embodiment, the coil 400 can also be connected to the core shaft 100 as an integral structure and located on the surface of the core shaft 100. When the third magnetic member 500 moves along the axial direction of the core shaft 100, the magnetic flux lines of the inner ring of the third magnetic member 500 are cut by the coil 400, and the radial size of the device as a whole can be reduced. Alternatively, the coil 400 is spaced apart from the third magnetic member 500 along the radial direction of the core shaft 100. When the third magnetic member 500 moves along the axial direction of the core shaft 100, the magnetic flux lines between the outer ring and the inner ring of the third magnetic member 500 are cut by the coil 400.

[0055] Reference Figure 1 As shown, in some embodiments of the present invention, the coil 400 includes a coil 400 layer and a curing layer connected to the coil 400 layer, and the curing layer is used to fix the coil 400 layer.

[0056] It is worth understanding that the coil 400 layers are fixed as a whole by the solidifying layer, which makes it easier to install the coil 400. Specifically, when the coil 400 layers are solidified by the solidifying layer, the axial ends of the coil 400 can respectively abut against the first magnetic member 200 and the second magnetic member 300, thereby realizing a detachable connection between the coil 400 and the first magnetic member 200 and the second magnetic member 300.

[0057] Reference Figure 1 As shown, in some specific embodiments of the present invention, the solidified layer includes a first layer and a second layer, and the first layer, the coil 400 layer and the second layer are sequentially distributed along the radial direction of the core shaft 100, and the first layer and the second layer clamp and fix the coil 400 layer.

[0058] In this embodiment, the first layer and the second layer jointly clamp and fix the coil 400 layer, so that the coil 400 layer is subjected to a clamping force along the radial direction of the core shaft 100, thereby achieving clamping and fixing.

[0059] Reference Figure 1 As shown, in some specific embodiments of the present invention, the solidified layer and the coil 400 are connected to form an integrated structure.

[0060] In this embodiment, the solidified layer is a resin, and the molten resin is applied to the coil 400 layer. After the resin cools, the solidified layer and the coil 400 layer are connected to form an integrated structure, and the solidified layer can effectively support the coil 400 layer, so that the coil 400 layer is not easily deformed. In other embodiments, the solidified layer can also be a glue layer.

[0061] Reference Figure 1 As shown, in some specific embodiments of the present invention, the coil 400 is connected to the first magnetic member 200 and / or the second magnetic member 300 as an integrated structure.

[0062] In this embodiment, the coil 400 is connected to the first magnetic member 200 as an integral structure through resin, or is connected to the second magnetic member 300 as an integral structure through resin, or is connected to the first magnetic member 200 and the second magnetic member 300 through resin. In other embodiments, the coil 400 can also be connected to the first magnetic member 200 and / or the second magnetic member 300 as an integral structure by bonding or the like.

[0063] Reference Figure 1 As shown, in some specific embodiments of the present invention, the diameter of the mandrel 100 is Φ, the thickness of the mandrel 100 is h, and the mandrel 100 satisfies: 0mm<Φ≤20mm, 0mm<h≤40mm.

[0064] It is worth to understand that the diameter and thickness of the core shaft 100 are both small to adapt to the size of the micro wireless sensor and can be installed in the micro sensor without excessively increasing the overall size of the micro wireless sensor.

[0065] Reference Figure 1 As shown, in some specific embodiments of the present invention, the third magnetic member 500 includes a magnetic ring body and a sliding auxiliary member disposed on the inner circumference of the magnetic ring body, and the sliding auxiliary member is slidably connected to the outer circumference of the core shaft 100 .

[0066] It is worth understanding that the magnetic ring body moves axially along the core shaft 100 through the sliding auxiliary part, so that the movement of the magnetic ring body is smoother and it is not easy to deflect and collide with the outer peripheral surface of the core shaft 100, which is more reliable to use.

[0067] In this embodiment, the inner circumference of the sliding auxiliary member is a smooth surface, and the outer circumference of the core shaft 100 is also a smooth surface. The inner circumference of the sliding auxiliary member and the outer circumference of the core shaft 100 are clearance-matched, and the friction is reduced by the smooth surface, thereby making the movement of the magnetic ring body smoother. In other embodiments, the sliding auxiliary member includes a sliding ring body and a plurality of ball groups, the plurality of ball groups are evenly spaced along the axial direction of the sliding ring body, and the ball group includes a plurality of balls along the axial direction of the sliding ring body, so that the sliding auxiliary member is slidably connected to the outer circumference of the core shaft 100.

[0068] Reference Figure 1 As shown, in some specific embodiments of the present invention, the core shaft 100 is a non-ferromagnetic material. It should be noted that non-ferromagnetic materials are a general term for materials that do not have magnetism, such as most ceramic materials (except magnetic ceramics) and general non-ferrous metals (copper, aluminum, etc.).

[0069] Reference Figure 1As shown, in some specific embodiments of the present invention, the microelectronic device according to the second aspect of the present invention includes: the vibration energy harvesting device of the first aspect. It is worth understanding that the microelectronic device can obtain continuous electrical energy through vibration, so that the microelectronic device can work efficiently for a long time in a vibration environment, thereby improving the battery life of the microelectronic device.

[0070] The microelectronic devices may specifically include microsensors, watches, bracelets, etc., wherein watches include smart watches, digital watches, and electronic watches. Furthermore, the microsensors may be applied to the tire field or other mobile device fields.

[0071] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A vibration energy harvesting device, characterized in that: include: Mandrel; A first magnetic member and a second magnetic member are respectively disposed at two ends of the core shaft, and at least a portion of the first magnetic member and at least a portion of the second magnetic member are both located outside the outer circumference of the core shaft; A coil, which surrounds the core shaft and is disposed between the first magnetic member and the second magnetic member; The third magnetic component is arranged between the first magnetic component and the second magnetic component. The third magnetic component repels the first magnetic component and the second magnetic component. The third magnetic component is slidably sleeved on the outer peripheral surface of the core shaft.

2. The vibration energy harvesting device according to claim 1, characterized in that: The first magnetic member and / or the second magnetic member are detachably connected to the end of the core shaft.

3. The vibration energy harvesting device according to claim 2, characterized in that: The first magnetic member is sleeved on the core shaft, and the core shaft includes a main shaft portion and a first limiting portion connected to one end of the main shaft portion, at least part of the first limiting portion is located outside the outer circumferential surface of the main shaft portion, and stops the first magnetic member from moving away from one end of the second magnetic member.

4. The vibration energy harvesting device according to claim 3, characterized in that: The first limiting portion and the main shaft portion are connected to form an integral structure.

5. The vibration energy harvesting device according to claim 3, characterized in that: The first limiting portion is detachably connected to the main shaft portion.

6. The vibration energy harvesting device according to claim 5, characterized in that: A limiting hole is provided on the outer circumference of the main shaft portion, the first limiting portion includes a connecting portion and a stopping limiting portion, the connecting portion is detachably connected to the limiting hole, the stopping limiting portion is located outside the outer circumference of the main shaft portion and stops one end of the first magnetic member from being away from the second magnetic member; Alternatively, the outer circumferential surface of the main shaft portion is provided with an annular groove along the circumference of the main shaft portion, the first limiting portion is annularly clamped in the annular groove, a portion of the first limiting portion is located outside the outer circumferential surface of the main shaft portion, and stops the first magnetic part from moving away from one end of the second magnetic part.

7. The vibration energy harvesting device according to claim 1, characterized in that: The first magnetic component and / or the second magnetic component are connected to the core shaft as an integral structure.

8. The vibration energy harvesting device according to claim 1, characterized in that: The coil is arranged outside the third magnetic component along the radial direction of the core shaft.

9. The vibration energy harvesting device according to claim 8, characterized in that: The coil includes a coil layer and a solidifying layer connected to the coil layer, and the solidifying layer is used to fix the coil layer.

10. The vibration energy harvesting device according to claim 9, characterized in that: The solidified layer comprises a first layer and a second layer, the first layer, the coil layer and the second layer are sequentially distributed along the radial direction of the core shaft, and the first layer and the second layer clamp and fix the coil layer; Alternatively, the solidified layer and the coil layer are connected to form an integral structure.

11. The vibration energy harvesting device according to claim 1, characterized in that: The coil is connected to the first magnetic component and / or the second magnetic component as an integrated structure.

12. The vibration energy harvesting device according to claim 1, characterized in that: The diameter of the mandrel is Φ, the thickness of the mandrel is h, and the mandrel satisfies: 0mm<Φ≤20mm, 0mm<h≤40mm.

13. The vibration energy harvesting device according to claim 1, characterized in that: The third magnetic component includes a magnetic ring body and a sliding auxiliary component arranged on the inner circumference of the magnetic ring body, and the sliding auxiliary component is slidably connected to the outer circumference of the core shaft.

14. The vibration energy harvesting device according to claim 1, characterized in that: The core shaft is made of non-ferromagnetic material.

15. A microelectronic device, characterized in that: include: A vibration energy harvesting device as claimed in any one of claims 1 to 14.

Images