Linear vibration motor and electronic device

Abstract

The present invention belongs to the technical field of vibration generators, and relates to a linear vibration motor and an electronic device. The linear vibration motor comprises a housing, a vibrator assembly accommodated in the housing, and a stator assembly and an electromagnetic damping member which are fixedly connected to the housing and are used for driving the vibrator assembly to vibrate. The vibrator assembly comprises a magnetic circuit system, and the magnetic circuit system comprises at least two side magnetic steels and at least one central magnetic steel. Magnetization directions of two adjacent side magnetic steels are opposite and are perpendicular to a vibration direction, and a central magnetic steel is sandwiched between the two adjacent side magnetic steels. Along a first direction, the thickness of the central magnetic steel is less than the thickness of the side magnetic steels, and the center of gravity of the central magnetic steel is closer to the electromagnetic damping member than the center of gravity of the side magnetic steels. A magnetization direction of the central magnetic steel is parallel to the vibration direction, and the polarities of the central magnetic steel and the end portions of the two adjacent side magnetic steels close to one another are the same. The described structure can improve the electromagnetic damping effect, and can also maintain the magnetic field strength on one side of a coil.

Description

Linear vibration motors and electronic devices Technical Field

[0001] This invention belongs to the field of vibration generator technology, and specifically relates to a linear vibration motor and electronic device. Background Technology

[0002] With social progress and rapid technological development, electronic products have become widely used. As an important component of electronic products, vibration generators are therefore used extensively. In order to improve the user experience, especially to meet the needs of vibration alerts for electronic products, the performance requirements for vibration generators are becoming increasingly higher.

[0003] Among related technologies, linear vibration motors are widely used in mobile phones and other devices due to their fast response and distinct directional vibration, which enhances the user's tactile experience. Electromagnetic damping also has wide applications because of its good stability in high-temperature and high-humidity environments. However, as motor performance improves, the demand for motor damping also increases. When the motor size is small, the damping provided by the copper sheet is insufficient, resulting in a longer braking time. Summary of the Invention

[0004] The purpose of this invention is to provide a linear vibration motor and electronic device to at least partially solve the above-mentioned technical problems.

[0005] The first aspect of the present invention provides a linear vibration motor, including a housing, an oscillator assembly housed within the housing, a stator assembly for driving the oscillator assembly to vibrate, and an electromagnetic damping element, wherein the stator assembly and the electromagnetic damping element are both fixedly connected to the housing;

[0006] The stator assembly includes a coil, and the coil is provided on one side of the oscillator assembly along a first direction, and the electromagnetic damping element is provided on the other side. The first direction is perpendicular to the vibration direction of the oscillator assembly.

[0007] The oscillator assembly includes a magnetic circuit system comprising at least two side magnets and at least one center magnet. The magnetization directions of two adjacent side magnets are opposite and parallel to the first direction. The center magnet is sandwiched between two adjacent side magnets. Along the first direction, the thickness of the center magnet is less than the thickness of the side magnets, and the center of gravity of the center magnet is closer to the electromagnetic damping element than the center of gravity of the side magnets. The magnetization direction of the center magnet is parallel to the vibration direction. The ends of the center magnet and the two adjacent side magnets that are close to each other have the same polarity. The two driving sides of the coil are respectively arranged opposite to the two adjacent side magnets.

[0008] The linear vibration motor provided by this invention may also have the following additional technical features:

[0009] In one specific embodiment of the present invention, the oscillator assembly further includes a crossbeam made of a non-magnetic material, the crossbeam being located between two adjacent side magnets, and in the first direction, the crossbeam being stacked with at least one center magnet, the crossbeam being located between the center magnet and the coil.

[0010] In one specific embodiment of the present invention, the oscillator assembly further includes a mass block having a through hole, a crossbeam located within the through hole and dividing the through hole into at least two cavities, and the side magnets are embedded in at least two of the cavities, and the crossbeam and the mass block are integrally formed.

[0011] In one specific embodiment of the present invention, the mass block is flush with the side of the crossbeam closest to the coil;

[0012] And / or, along the first direction, the two ends of the edge magnet are flush with the two ends of the mass block.

[0013] In one specific embodiment of the present invention, the magnetic circuit system includes two side magnets and a central magnet;

[0014] And / or, the housing includes a first housing for fixing the electromagnetic damping element, the first housing being made of a magnetically conductive material.

[0015] In one specific embodiment of the present invention, the oscillator assembly further includes a bracket for fixing the magnetic circuit system, and the crossbeam is part of the bracket.

[0016] In one specific embodiment of the present invention, the bracket includes the crossbeam and end plates located at both ends of the crossbeam. The bracket is I-shaped, and at least two of the side magnets are symmetrically arranged on opposite sides of the crossbeam.

[0017] Alternatively, the bracket includes a frame and a crossbeam located within the frame, with at least two side magnets located within the frame and symmetrically arranged on opposite sides of the crossbeam.

[0018] In one specific embodiment of the present invention, the oscillator assembly further includes a mass block, which is fixed to the support.

[0019] In one specific embodiment of the present invention, the electromagnetic damping element is a copper sheet.

[0020] A second aspect of the present invention provides an electronic device comprising the linear vibration motor described in any one of the preceding claims.

[0021] The present invention proposes a linear vibration motor comprising a housing, an oscillator assembly housed within the housing, and a stator assembly and an electromagnetic damping element fixedly connected to the housing for driving the oscillator assembly to vibrate. The stator assembly includes a coil, and along a first direction perpendicular to the vibration direction of the oscillator assembly, the coil is disposed on one side of the stator assembly, and the electromagnetic damping element is disposed on the other side. The oscillator assembly includes a magnetic circuit system comprising at least two side magnets and at least one center magnet. The magnetization directions of two adjacent side magnets are opposite and parallel to the first direction. The center magnet is sandwiched between two adjacent side magnets. Along the first direction, the thickness of the center magnet is less than the thickness of the side magnets, and the center of gravity of the center magnet is closer to the electromagnetic damping element than the center of gravity of the side magnets. The magnetization direction of the center magnet is parallel to the vibration direction. The polarities of the ends of the center magnet and the two adjacent side magnets that are close to each other are the same. The two driving sides of the coil are respectively disposed opposite to the two adjacent side magnets. The above structure strengthens the magnetic field strength on the side of the electromagnetic damping component by making the thickness of the central magnet smaller than that of the side magnet, thereby improving the electromagnetic damping effect and avoiding poor damping effect caused by fewer magnetic lines passing through the electromagnetic damping component, thus adjusting the vibration of the motor. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 is an exploded view of the structure of a linear vibration motor in a specific embodiment of the present invention;

[0024] Figure 2 is a partial structural diagram of the linear vibration motor in Figure 1;

[0025] Figure 3 is a partial structural diagram of Figure 2 with the electromagnetic damping component removed;

[0026] Figure 4 is a cross-sectional structural diagram of a linear vibration motor in a specific embodiment of the present invention.

[0027] Explanation of reference numerals in the attached drawings: 100-Linear vibration motor; 10-Housing, 11-First housing, 12-Second housing; 20-Oscillator assembly, 21-Crossbeam, 22-Magnetic circuit system, 221-Side magnet, 222-Center magnet, 23-Spring, 24-Mass block; 30-Stator assembly, 31-Coil, 32-Flexible circuit board; 40-Electromagnetic damping component. Detailed Implementation

[0028] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0029] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0030] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0031] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0032] The term "mass block 24" as used in the following description of the embodiments can also be called a "counterweight block," referring to a high-quality, high-density metal block that is fixed to the vibrating magnetic circuit system to enhance vibration balance.

[0033] As shown in Figures 1-4, the linear vibration motor 100 of this embodiment includes a housing 10, a vibrator assembly 20 housed within the housing 10, a stator assembly 30 for driving the vibrator assembly 20 to vibrate, and an electromagnetic damping element 40. The stator assembly 30 and the electromagnetic damping element 40 are both fixedly connected to the housing 10. The stator assembly 30 includes a coil 31, with the coil 31 provided on one side of the vibrator assembly 20 along a first direction, and the electromagnetic damping element 40 provided on the other side. The first direction is perpendicular to the vibration direction of the vibrator assembly 20. The vibrator assembly 20 includes a magnetic circuit system 22, which includes at least two side magnets 221. The coil 31 has at least one central magnet 222, and the magnetization directions of two adjacent side magnets 221 are opposite and parallel to the first direction. A central magnet 222 is sandwiched between two adjacent side magnets 221. Along the first direction, the thickness of the central magnet 222 is less than the thickness of the side magnets 221, and the center of gravity of the central magnet 222 is closer to the electromagnetic damping member 40 than the center of gravity of the side magnets 221. The magnetization direction of the central magnet 222 is parallel to the vibration direction. The polarities of the ends of the central magnet 222 and the two adjacent side magnets 221 that are close to each other are the same. The two driving sides of the coil 31 are respectively arranged opposite to the two adjacent side magnets 221.

[0034] In one embodiment, the oscillator assembly 20 of the linear vibration motor 100 reciprocates along the major axis, meaning the vibration direction of the oscillator assembly 20 is parallel to the major axis. In other embodiments, the vibration direction of the oscillator assembly 20 may also be parallel to the minor axis, or parallel to the height direction, with the height direction perpendicular to both the major and minor axes. This invention does not limit the vibration direction.

[0035] The housing 10 has a receiving cavity, which provides installation space. Optionally, the housing 10 is rectangular, but it can also take other shapes, such as cube or cylinder.

[0036] The stator assembly 30, the oscillator assembly 20, and the electromagnetic damping element 40 are all disposed within the housing 10. The stator assembly 30 and the electromagnetic damping element 40 are fixedly connected to the housing 10. The oscillator assembly 20 is disposed between the stator assembly 30 and the electromagnetic damping element 40. The stator assembly 30 provides vibration drive for the oscillator assembly 20, and the electromagnetic damping element 40 provides electromagnetic damping for the oscillator assembly 20. Under the combined action of the stator assembly 30 and the electromagnetic damping element 40, the oscillator assembly 20 undergoes linear vibration within the housing 10, thereby providing vibration feedback for the electronic device.

[0037] The stator assembly 30 includes a coil 31, which is ring-shaped and fixed to the housing 10 with its axial direction perpendicular to the vibration direction. The coil 31 and the electromagnetic damping element 40 are respectively disposed on both sides of the oscillator assembly 20 along a first direction perpendicular to the vibration direction of the oscillator assembly 20.

[0038] The oscillator assembly 20 includes a magnetic circuit system 22, wherein at least two side magnets 221 are arranged sequentially along the vibration direction of the oscillator assembly 20, thus facing the two driving sides of the coil 31 respectively; the magnetization directions of adjacent two side magnets 221 are opposite and parallel to a first direction, thereby forming a closed magnetic circuit. The magnetic circuit system 22 also includes at least one central magnet 222, which is clamped between adjacent side magnets 221, and along the first direction, the thickness of the central magnet 222 is less than the thickness of the side magnets 221. In the clamped state, the center of gravity of the central magnet 222 is closer to the electromagnetic damping member 40 than the center of gravity of the side magnets 221. The magnetization direction of the central magnet 222 is parallel to the vibration direction, and the polarities of the ends of the central magnet 222 and the two adjacent side magnets 221 that are close to each other are the same.

[0039] In the aforementioned magnetic circuit system 22, the central magnet 222 can cooperate with the side magnets 221 to form a Heilbeck array. This array can converge magnetic lines of force on one side of the magnetic circuit system 22. In this embodiment, it is used to converge magnetic lines of force on the side of the magnetic circuit system 22 near the electromagnetic damping element 40, thereby increasing the magnetic field strength near the electromagnetic damping element 40 and thus improving the electromagnetic damping effect of the motor. At the same time, by making the thickness of the central magnet 222 smaller than that of the side magnets 221 and making it further away from the coil 31, the influence of the central magnet 222 on the magnetic field of the magnetic circuit system 22 near the coil 31 is reduced, thereby avoiding the magnetic field strength on the coil 31 side being too small and avoiding poor driving effect due to fewer magnetic lines of force passing through the coil 31. That is, the above settings can also maintain the magnetic field on the side of the magnetic circuit system 22 near the coil 31 and ensure the driving effect.

[0040] The linear vibration motor 100 provided in this embodiment of the invention improves the structure of the magnetic circuit system 22 of the oscillator assembly 20 by setting a central magnet 222 with a thickness smaller than that of the side magnet 221 and clamped to the side magnet 221 near the coil 31, and making the polarity of the central magnet 222 and the two adjacent side magnets 221 the same when they are close to each other. This can increase the magnetic field strength on the side of the magnetic circuit system 22 near the electromagnetic damping member 40 while maintaining the magnetic field strength on the other side, thereby improving the electromagnetic damping effect, that is, improving the braking effect.

[0041] In one specific embodiment of the present invention, the oscillator assembly 20 further includes a crossbeam 21 made of a non-magnetic material. The crossbeam 21 is located between two adjacent side magnets 221. In a first direction, the crossbeam 21 is stacked with at least one central magnet 222. The crossbeam 21 is located between the central magnet 222 and the coil 31.

[0042] This embodiment sets up a crossbeam 21 made of non-magnetic material in the oscillator assembly 20 and places it in the space formed by the side magnets 221 and the center magnet 222. The purpose is twofold: firstly, to better fix the magnetic circuit system 22; and secondly, to improve the mass of the oscillator assembly 20 by making full use of the space formed by the magnetic circuit system 22 without affecting the magnetic field of the magnetic circuit system 22. This reduces the displacement of the oscillator assembly 20 while keeping the driving force constant, so that the oscillator assembly 20 can provide a larger vibration at a lower displacement, thereby reducing the risk of failure of the linear vibration motor 100 and improving the reliability of the linear vibration motor 100.

[0043] In one specific embodiment of the present invention, the oscillator assembly 20 further includes a mass block 24 having a through hole, a crossbeam 21 located in the through hole and dividing the through hole into at least two cavities, and a side magnet 221 embedded in each of the at least two cavities, the crossbeam 21 and the mass block 24 being integrally formed.

[0044] This embodiment further increases the mass of the oscillator assembly 20 by adding a mass block 24, thereby further reducing the displacement of the oscillator assembly 20 while maintaining the same driving force. This allows the oscillator assembly 20 to provide a larger vibration at a lower displacement, thus reducing the risk of failure of the linear vibration motor 100 and improving its reliability. Simultaneously, by providing through holes in the mass block 24 that are divided into two cavities by the crossbeam 21, and accommodating the magnetic circuit system 22 through these through holes, the mass block 24 and the magnetic circuit system 22 are assembled together. Furthermore, the integral molding of the crossbeam 21 and the mass block 24 not only better secures the magnetic circuit system 22 but also saves on the molding steps of the crossbeam 21 and the mass block 24, reducing assembly time and improving the processing efficiency of the linear vibration motor 100.

[0045] In one specific embodiment of the present invention, the mass block 24 and the crossbeam 21 are flush with the side near the electromagnetic damping element 40. By being flush, mutual interference between the mass block 24 and the electromagnetic damping element 40 can be avoided, thereby ensuring the vibration effect of the oscillator assembly 20.

[0046] In one specific embodiment of the present invention, along the first direction, the two ends of the side magnet 221 are flush with the two ends of the mass block 24, which facilitates assembly and improves assembly accuracy, and makes full use of the through holes of the mass block 24.

[0047] In one specific embodiment of the present invention, the magnetic circuit system 22 includes two side magnets 221 and a central magnet 222. This saves the volume of the magnetic circuit system 22, thereby miniaturizing the linear vibration motor 100.

[0048] In one specific embodiment of the present invention, the housing 10 includes a first housing 11 for fixing the electromagnetic damping member 40. The first housing 11 is made of a magnetically conductive material, so that the magnetic field passing through the electromagnetic damping member 40 can be adjusted by the first housing 11 to improve the vibration consistency of the linear vibration motor 100.

[0049] Optionally, housing 10 further includes a second housing 12, which is adapted to and connected to the first housing 11 to form a receiving cavity. Coil 31 is fixedly connected to the side of the second housing 12 opposite to the first housing 11.

[0050] In one specific embodiment of the present invention, the oscillator assembly 20 further includes a bracket for fixing the magnetic circuit system 22, and the crossbeam 21 is part of the bracket. The bracket is movably connected to the housing 10 via a spring piece 23, thereby allowing the magnetic circuit system 22 to be movably connected to the housing 10 via the bracket.

[0051] In one specific embodiment of the present invention, the bracket includes a crossbeam 21 and end plates located at both ends of the crossbeam 21. The bracket is I-shaped, and at least two side magnets 221 are symmetrically arranged on opposite sides of the crossbeam 21.

[0052] Specifically, the two end plates are connected by a cross beam 21 to form an I-shaped structure. The side magnetic steel 221 is symmetrically arranged on the opposite sides of the cross beam 21, and the two ends of the side magnetic steel 221 are respectively connected to the two end plates. The central magnetic steel 222 and the side magnetic steel 221 are adhesively fixed to the cross beam 21, or the central magnetic steel 222 and the side magnetic steel 221 are adhesively fixed to the end plates, or the central magnetic steel 222 and the side magnetic steel 221 are adhesively fixed to the cross beam 21 and the end plates simultaneously.

[0053] In a specific embodiment of the present invention, the bracket includes a frame portion and a cross beam 21 located inside the frame portion. At least two side magnetic steels 221 are located inside the frame portion and symmetrically arranged on the opposite sides of the cross beam 21.

[0054] Specifically, the cross beam 21 is arranged inside the frame portion so that the bracket is in a "day" shape, and the side magnetic steel 221 is located in the cavity formed by the cross beam 21 and the frame portion in the bracket. Specifically, the central magnetic steel 222 and the side magnetic steel 221 are adhesively fixed to the cross beam 21, or the central magnetic steel 222 and the side magnetic steel 221 are adhesively fixed to the frame portion, or the central magnetic steel 222 and the side magnetic steel 221 are adhesively fixed to the cross beam 21 and the frame portion simultaneously.

[0055] In a specific embodiment of the present invention, the oscillator assembly 20 further includes a mass block 24, and the mass block 24 is fixed to the bracket. This can further increase the mass of the oscillator assembly 20, so that the oscillator assembly 20 provides a greater vibration sensation at a lower displacement, thereby reducing the risk of failure of the linear vibration motor 100 and improving the reliability of the linear vibration motor 100.

[0056] Optionally, there are two mass blocks 24, which are respectively located at the two ends of the bracket. Specifically, when the bracket includes end plates, the mass blocks 24 are located on the sides of the two end plates away from the cross beam 21. When the bracket includes a frame portion, the mass blocks 24 are located on the opposite sides of the frame portion.

[0057] Optionally, through holes are provided on the mass block 24, and the bracket fixed with the magnetic circuit system 22 is embedded in the through holes. Specifically, when the bracket includes end plates, the I-shaped bracket combined with the magnetic circuit is embedded in the through holes. When the bracket includes a frame portion, the frame-shaped bracket combined with the magnetic circuit is embedded in the through holes.

[0058] In a specific embodiment of the present invention, the number of the elastic sheets 23 is two, and they are respectively arranged on the two sides of the oscillator assembly 20 along the vibration direction. The elastic sheet 23 includes a first connecting portion, a second connecting portion, and a vibrating arm connecting the first connecting portion and the second connecting portion. The first connecting portion is welded to the housing 10, and the second connecting portion is welded to the mass block 24. The vibrating arm can be in a straight shape. Optionally, in this embodiment, the vibrating arm is in a V shape, and the first connecting portion and the second connecting portion are respectively arranged at the two open ends of the vibrating arm.

[0059] In one specific embodiment of the present invention, the electromagnetic damping element 40 is a copper sheet. The copper sheet is located in the magnetic field formed by the magnetic circuit system 22. Since the magnetic circuit system 22 vibrates along with the oscillator assembly 20, the magnetic field lines penetrating the copper sheet alternately change, generating a large electromagnetic damping. This ensures the electromagnetic damping of the electromagnetic damping element 40, thereby improving the vibration consistency of the linear vibration motor 100.

[0060] In one specific embodiment of the present invention, the stator assembly 30 further includes a flexible circuit board 32 connected to the second housing 12. The flexible circuit board 32 is connected to the coil 31 and is adapted to connect the coil 31 to an external circuit, thereby providing alternating current to the coil 31.

[0061] A second aspect of the present invention provides an electronic device, which includes the linear vibration motor 100 described in any of the above-mentioned embodiments. Specifically, the electronic device can be a mobile phone, tablet, etc., and the specific structure of the linear vibration motor 100 in the electronic device can be referred to the above embodiments, which will not be repeated here. Since the electronic device has all the technical features of the above embodiments, it also has at least the beneficial effects of the above embodiments.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A linear vibration motor, characterized in that, The device includes a housing, an oscillator assembly housed within the housing, a stator assembly for driving the oscillator assembly to vibrate, and an electromagnetic damping element, wherein the stator assembly and the electromagnetic damping element are both fixedly connected to the housing. The stator assembly includes a coil, and the coil is provided on one side of the oscillator assembly along a first direction, and the electromagnetic damping element is provided on the other side. The first direction is perpendicular to the vibration direction of the oscillator assembly. The oscillator assembly includes a magnetic circuit system comprising at least two side magnets and at least one center magnet. The magnetization directions of two adjacent side magnets are opposite and parallel to the first direction. The center magnet is sandwiched between two adjacent side magnets. Along the first direction, the thickness of the center magnet is less than the thickness of the side magnets, and the center of gravity of the center magnet is closer to the electromagnetic damping element than the center of gravity of the side magnets. The magnetization direction of the center magnet is parallel to the vibration direction. The ends of the center magnet and the two adjacent side magnets that are close to each other have the same polarity. The two driving sides of the coil are respectively arranged opposite to the two adjacent side magnets.

2. The linear vibration motor according to claim 1, characterized in that, The oscillator assembly also includes a crossbeam made of a non-magnetic material. The crossbeam is located between two adjacent side magnets. In the first direction, the crossbeam is stacked with at least one center magnet. The crossbeam is located between the center magnet and the coil.

3. The linear vibration motor according to claim 2, characterized in that, The oscillator assembly also includes a mass block having a through hole, a crossbeam located within the through hole and dividing the through hole into at least two cavities, and the edge magnets are embedded in at least two of the cavities. The crossbeam and the mass block are integrally formed.

4. The linear vibration motor according to claim 3, characterized in that, The mass block is flush with the side of the crossbeam closest to the coil; And / or, along the first direction, the two ends of the edge magnet are flush with the two ends of the mass block.

5. The linear vibration motor according to claim 1, characterized in that, The magnetic circuit system includes two side magnets and one central magnet; And / or, the housing includes a first housing for fixing the electromagnetic damping element, the first housing being made of a magnetically conductive material.

6. The linear vibration motor according to claim 2, characterized in that, The oscillator assembly also includes a bracket for fixing the magnetic circuit system, and the crossbeam is part of the bracket.

7. The linear vibration motor according to claim 6, characterized in that, The support includes the crossbeam and end plates located at both ends of the crossbeam. The support is I-shaped, and at least two of the side magnets are symmetrically arranged on opposite sides of the crossbeam. Alternatively, the bracket includes a frame and a crossbeam located within the frame, with at least two side magnets located within the frame and symmetrically arranged on opposite sides of the crossbeam.

8. The linear vibration motor according to claim 6 or 7, characterized in that, The oscillator assembly also includes a mass block, which is fixed to the support.

9. The linear vibration motor according to claim 1, characterized in that, The electromagnetic damping element is a copper sheet.

10. An electronic device, characterized in that, Includes the linear vibration motor according to any one of claims 1-9.

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