Linear vibration motor and electronic device

Abstract

The utility model belongs to the technical field of vibration generators, and relates to a linear vibration motor and electronic equipment, 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 with the housing and used for driving the vibrator assembly to vibrate; the magnetic circuit system comprises at least two pieces of side magnetic steel and at least one piece of center magnetic steel, the magnetizing directions of the two adjacent pieces of side magnetic steel are opposite and perpendicular to the vibration direction, the center magnetic steel is clamped between the two adjacent pieces of side magnetic steel, and the thickness of the center magnetic steel is smaller than that of the side magnetic steel in the first direction. The center of gravity of the central magnetic steel is closer to the electromagnetic damping piece than the center of gravity of the side magnetic steel, the magnetizing direction of the central magnetic steel is parallel to the vibration direction, and the polarities of the ends, close to each other, of the central magnetic steel and the two adjacent side magnetic steel are the same. The structure not only can improve the electromagnetic damping effect, but also can maintain the magnetic field intensity on one side of the coil.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration generators, and particularly relates to a linear vibration motor and electronic equipment. Background Art

[0002] With the progress of society and the rapid development of science and technology, electronic products have been widely used. As one of the important components of electronic products, vibration devices have been widely used. In order to improve user experience, especially to meet the demand for vibration prompts for electronic products, the requirements for the performance of vibration sound devices are becoming higher and 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. Linear motors with electromagnetic damping are widely used because electromagnetic damping maintains good stability in high-temperature and high-humidity environments. Furthermore, as motor performance improves, the demand for motor damping is also increasing. When the motor is small, the damping provided by the copper sheet is relatively low, resulting in a prolonged braking time. Utility Model Content

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

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

[0006] The stator assembly includes a coil, the coil is provided on one side of the vibrator assembly along a first direction, and the electromagnetic damping member is provided on the other side thereof, wherein the first direction is perpendicular to the vibration direction of the vibrator assembly;

[0007] The vibrator assembly includes a magnetic circuit system, which includes 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 component than the center of gravity of the side magnets. The magnetization direction of the center magnet is parallel to the vibration direction. The polarity of the ends of the center magnet and the two adjacent side magnets that are close to each other is the same. The two driving edges of the coil are respectively arranged opposite to the two adjacent side magnets.

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

[0009] In a specific embodiment of the present invention, the vibrator assembly also includes a crossbeam, which is made of non-magnetic material. The crossbeam is located between two adjacent side magnetic steels. In the first direction, the crossbeam is stacked with at least one central magnetic steel, and the crossbeam is located between the central magnetic steel and the coil.

[0010] In a specific embodiment of the present invention, the vibrator assembly also includes a mass block, the mass block has a through hole, the crossbeam is located in the through hole and separates the through hole into at least two cavities, the edge magnets are embedded in at least two of the cavities, and the crossbeam and the mass block are integrally formed.

[0011] In a specific embodiment of the present invention, the mass block is arranged flush with a side of the beam close to the coil;

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

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

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

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

[0016] In a specific embodiment of the present invention, the bracket includes the beam and end plates located at both ends of the beam, the bracket is I-shaped, and at least two edge magnetic steels are symmetrically arranged on opposite sides of the beam;

[0017] Alternatively, the bracket includes a frame portion and the crossbeam located in the frame portion, and at least two edge magnetic steels are located in the frame portion and are symmetrically arranged on opposite sides of the crossbeam.

[0018] In a specific implementation manner of the present invention, the vibrator assembly further includes a mass block, and the mass block is fixed to the bracket.

[0019] In a specific implementation manner of the present invention, the electromagnetic damping member is a copper sheet.

[0020] A second aspect of the present invention provides an electronic device, comprising any one of the linear vibration motors described above.

[0021] The utility model proposes a linear vibration motor including a housing, a vibrator assembly accommodated in the housing, and a stator assembly and an electromagnetic damping member fixedly connected to the housing and used to drive the vibrator assembly to vibrate; the stator assembly includes a coil, and along a first direction perpendicular to the vibration direction of the vibrator assembly, the coil is provided on one side of the stator assembly and the electromagnetic damping member is provided on the other side; the vibrator assembly includes a magnetic circuit system, the magnetic circuit system includes 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 member than the center of gravity of the side magnets, the magnetization direction of the center magnet is parallel to the vibration direction, the polarity of the ends of the center magnet and the two adjacent side magnets that are close to each other is the same, and the two driving sides of the coil are respectively arranged opposite to the two adjacent side magnets. The above structure strengthens the magnetic field strength on the electromagnetic damping element side by making the thickness of the central magnetic steel smaller than that of the side magnetic steel, thereby improving the electromagnetic damping effect and avoiding the poor damping effect caused by the small number of magnetic lines passing through the electromagnetic damping element, thereby adjusting the vibration of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0024] Figure 2 for Figure 1 Schematic diagram of some structures in the linear vibration motor;

[0025] Figure 3 for Figure 2 Schematic diagram of part of the structure without electromagnetic damping components;

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

[0027] Description of reference numerals:

[0028] 100-Linear vibration motor;

[0029] 10-housing, 11-first housing, 12-second housing;

[0030] 20-vibrator assembly, 21-crossbeam, 22-magnetic circuit system, 221-side magnet, 222-center magnet, 23-spring, 24-mass block;

[0031] 30-stator assembly, 31-coil, 32-flexible circuit board;

[0032] 40-Electromagnetic damping element. DETAILED DESCRIPTION

[0033] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0034] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0035] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0036] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0037] The “mass block 24 ” used in the description of the following embodiments may also be referred to as a “weight block”, both of which refer to a high-quality, high-density metal block fixed to the magnetic circuit system that generates vibrations to enhance vibration balance.

[0038] like Figure 1-4 As shown, the linear vibration motor 100 of the embodiment of the present invention includes a housing 10, a vibrator assembly 20 accommodated in the housing 10, a stator assembly 30 for driving the vibrator assembly 20 to vibrate, and an electromagnetic damping member 40, the stator assembly 30 and the electromagnetic damping member 40 are both fixedly connected to the housing 10; the stator assembly 30 includes a coil 31, and the coil 31 is provided on one side of the vibrator assembly 20 along a first direction, and the electromagnetic damping member 40 is 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, and the magnetic circuit system 22 includes at least two side magnets 221 and at least two side magnets 222. There is one less center magnet 222, and the magnetizing directions of the two adjacent side magnets 221 are opposite and parallel to the first direction. A center magnet 222 is sandwiched between the two adjacent side magnets 221. Along the first direction, the thickness of the center magnet 222 is less than the thickness of the side magnets 221, and the center of gravity of the center magnet 222 is closer to the electromagnetic damping component 40 than the center of gravity of the side magnets 221. The magnetizing direction of the center magnet 222 is parallel to the vibration direction, and the polarity of the ends of the center magnet 222 and the two adjacent side magnets 221 that are close to each other is the same, and the two driving sides of the coil 31 are respectively arranged opposite to the two adjacent side magnets 221.

[0039] In one embodiment, the vibrator assembly 20 of the linear vibration motor 100 reciprocates along the long axis, i.e., the vibration direction of the vibrator assembly 20 is parallel to the long axis. In other embodiments, the vibration direction of the vibrator assembly 20 may be parallel to the short axis, or parallel to the height direction, with the height direction being perpendicular to both the long axis and the short axis. This invention does not impose any restrictions on the vibration direction.

[0040] The housing 10 is provided with a receiving cavity, and the receiving cavity provides an installation space. Optionally, the housing 10 is in a rectangular parallelepiped shape. Of course, the housing 10 can also adopt other shapes, such as a cube or a cylinder.

[0041] The stator assembly 30, the vibrator assembly 20 and the electromagnetic damping member 40 are all arranged in the shell 10, wherein the stator assembly 30 and the electromagnetic damping member 40 are both fixedly connected to the shell 10, and the vibrator assembly 20 is arranged between the stator assembly 30 and the electromagnetic damping member 40, wherein the stator assembly 30 is used to provide vibration drive for the vibrator assembly 20, and the electromagnetic damping member 40 is used to provide electromagnetic damping for the vibrator assembly 20. Under the joint action of the stator assembly 30 and the electromagnetic damping member 40, the vibrator assembly 20 vibrates linearly in the shell 10, thereby providing vibration sensing for the electronic device.

[0042] The stator assembly 30 includes a ring-shaped coil 31 fixed to the housing 10 with its axial direction perpendicular to the vibration direction. The coil 31 and the electromagnetic damping member 40 are disposed on either side of the vibrator assembly 20 along a first direction perpendicular to the vibration direction of the vibrator assembly 20.

[0043] The vibrator assembly 20 includes a magnetic circuit system 22, wherein the magnetic circuit system 22 includes at least two side magnets 221 arranged in sequence along the vibration direction of the vibrator assembly 20, so as to be respectively arranged opposite the two driving edges of the coil 31; the magnetization directions of the two adjacent side magnets 221 are opposite and parallel to the 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 polarity of the ends of the central magnet 222 and the two adjacent side magnets 221 that are close to each other is the same.

[0044] In the above-mentioned magnetic circuit system 22, the central magnet 222 can cooperate with the side magnet 221 to form a Halbach array. This array can gather magnetic lines of force on one side of the magnetic circuit system 22. In this embodiment, it is used to gather magnetic lines of force on the side of the magnetic circuit system 22 close to the electromagnetic damping component 40, thereby increasing the magnetic field strength close to the electromagnetic damping component 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 the side magnet 221 and making it farther away from the coil 31, the influence of the central magnet 222 on the magnetic field on the side of the magnetic circuit system 22 close to the coil 31 is reduced, thereby avoiding the magnetic field strength on the side of the coil 31 being too small, and avoiding poor driving effect due to the small number of magnetic lines of force passing through the coil 31. That is, the above-mentioned setting can also maintain the magnetic field on the side of the magnetic circuit system 22 close to the coil 31 to ensure the driving effect.

[0045] The linear vibration motor 100 provided by the embodiment of the present invention improves the structure of the magnetic circuit system 22 of the vibrator assembly 20, and provides a center magnet 222 having a thickness less than that of the side magnet 221 and clamped on the side of the side magnet 221 close to the coil 31, and makes the polarity of the center magnet 222 and the ends of the two adjacent side magnets 221 close to each other the same, so that the magnetic field strength on the side of the magnetic circuit system 22 close to the electromagnetic damping member 40 can be increased while maintaining the magnetic field strength on the other side, thereby improving the electromagnetic damping effect, that is, improving the braking effect.

[0046] In a specific embodiment of the present invention, the vibrator assembly 20 also includes a beam 21, which is made of non-magnetic material. The beam 21 is located between two adjacent side magnets 221. In the first direction, the beam 21 is stacked with at least one center magnet 222, and the beam 21 is located between the center magnet 222 and the coil 31.

[0047] In this embodiment, a crossbeam 21 made of a non-magnetic material is provided in the vibrator assembly 20, and is disposed in a space enclosed by the side magnetic steels 221 and the center magnetic steels 222. The purpose of this is, on the one hand, to better fix the magnetic circuit system 22, and on the other hand, to improve the quality of the vibrator assembly 20 by fully utilizing the space formed by the magnetic circuit system 22 without affecting the magnetic field of the magnetic circuit system 22, thereby reducing the displacement of the vibrator assembly 20 while keeping the driving force unchanged. This means that the vibrator assembly 20 can provide 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.

[0048] In a specific embodiment of the present invention, the vibrator assembly 20 also includes a mass block 24, the mass block 24 has a through hole, the beam 21 is located in the through hole and divides the through hole into at least two cavities, at least two cavities are embedded in the side magnet 221, and the beam 21 and the mass block 24 are formed as one piece.

[0049] This embodiment further increases the mass of the vibrator assembly 20 by providing a mass block 24, thereby further reducing the displacement of the vibrator assembly 20 while maintaining the same driving force. This allows the vibrator assembly 20 to provide 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. Furthermore, by providing a through hole on the mass block 24 that is divided into two cavities by the crossbeam 21 and accommodating the magnetic circuit system 22 through the through hole, the mass block 24 and the magnetic circuit system 22 are assembled together. Furthermore, the integral molding of the crossbeam 21 and mass block 24 not only better secures the magnetic circuit system 22, but also eliminates the molding steps of the crossbeam 21 and mass block 24, saving assembly time and thus improving the processing efficiency of the linear vibration motor 100.

[0050] In a specific embodiment of the present invention, the mass block 24 is flush with the side of the beam 21 close to the electromagnetic damping member 40. The flush arrangement can avoid mutual interference between the mass block 24 and the electromagnetic damping member 40, thereby ensuring the vibration effect of the vibrator assembly 20.

[0051] In a specific embodiment of the present invention, along the first direction, the two ends of the edge magnet 221 are flush with the two ends of the mass block 24 , which facilitates assembly and improves assembly accuracy, and fully utilizes the through hole of the mass block 24 .

[0052] In a specific embodiment of the present invention, the magnetic circuit system 22 includes two side magnets 221 and a center magnet 222. This can save the volume of the magnetic circuit system 22, thereby miniaturizing the linear vibration motor 100.

[0053] In a specific embodiment of the present invention, the shell 10 includes a first shell 11 that fixes the electromagnetic damping member 40. The first shell 11 is made of a magnetic conductive material. In this way, the first shell 11 can be used to adjust the magnetic field passing through the electromagnetic damping member 40 to improve the vibration consistency of the linear vibration motor 100.

[0054] Optionally, the housing 10 further includes a second housing 12 , which is adapted to be connected to the first housing 11 to form a receiving cavity. The coil 31 is fixedly connected to a side of the second housing 12 opposite to the first housing 11 .

[0055] In one embodiment of the present invention, the vibrator assembly 20 further includes a bracket for securing the magnetic circuit system 22, with the crossbeam 21 being part of the bracket. The bracket is movably connected to the housing 10 via a spring 23, thereby enabling the magnetic circuit system 22 to be movably connected to the housing 10 via the bracket.

[0056] In a specific embodiment of the present utility model, the bracket includes a cross beam 21 and end plates located at both ends of the cross beam 21. The bracket is in the shape of a capital "I", and at least two side magnets 221 are symmetrically arranged on opposite sides of the cross beam 21.

[0057] Specifically, the two end plates are connected by the cross beam 21 to form a capital "I" shape. The side magnets 221 are symmetrically arranged on opposite sides of the cross beam 21, and both ends of the side magnets 221 are respectively connected to the two end plates. The central magnet 222 and the side magnets 221 are adhesively fixed to the cross beam 21, or the central magnet 222 and the side magnets 221 are adhesively fixed to the end plates, or the central magnet 222 and the side magnets 221 are adhesively fixed to the cross beam 21 and the end plates simultaneously.

[0058] In a specific embodiment of the present utility model, the bracket includes a frame portion and a cross beam 21 located inside the frame portion. At least two side magnets 221 are located inside the frame portion and are symmetrically arranged on opposite sides of the cross beam 21.

[0059] Specifically, the cross beam 21 is arranged inside the frame portion so that the bracket is in the shape of a Chinese character "日" (sun). The side magnets 221 are located in the cavity formed by the cross beam 21 and the frame portion in the bracket. Specifically, the central magnet 222 and the side magnets 221 are adhesively fixed to the cross beam 21, or the central magnet 222 and the side magnets 221 are adhesively fixed to the frame portion, or the central magnet 222 and the side magnets 221 are adhesively fixed to the cross beam 21 and the frame portion simultaneously.

[0060] In a specific embodiment of the present utility model, 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 can provide a greater sense of 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.

[0061] Optionally, there are two mass blocks ¼, which are respectively located at both 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 opposite sides of the frame portion.

[0062] Optionally, through holes are provided on the mass blocks 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.

[0063] In one embodiment of the present invention, two springs 23 are provided, one at each end of the vibrator assembly 20 along the vibration direction. The springs 23 include a first connecting portion, a second connecting portion, and a vibrating arm connected between the first and second connecting portions. The first connecting portion is welded to the housing 10, and the second connecting portion is welded to the mass 24. The vibrating arm can be straight-line shaped. Alternatively, in this embodiment, the vibrating arm is V-shaped, with the first and second connecting portions respectively disposed at the two open ends of the vibrating arm.

[0064] In one embodiment of the present invention, the electromagnetic damping element 40 is a copper sheet. The copper sheet is located within the magnetic field formed by the magnetic circuit system 22. As the magnetic circuit system 22 vibrates along with the vibrator assembly 20, the magnetic flux lines penetrating the copper sheet alternate, generating significant electromagnetic damping. This ensures electromagnetic damping of the electromagnetic damping element 40, thereby improving the vibration consistency of the linear vibration motor 100.

[0065] In a 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 in communication with the coil 31 and is suitable for connecting the coil 31 to an external circuit, thereby providing alternating current to the coil 31 .

[0066] A second aspect of the present invention provides an electronic device comprising any of the aforementioned linear vibration motors 100. Specifically, the electronic device may be a mobile phone, tablet, or the like. The specific structure of the linear vibration motor 100 in the electronic device can be referenced from the aforementioned embodiments and will not be further described here. Because the electronic device possesses all the technical features of the aforementioned embodiments, it also exhibits at least the beneficial effects of the aforementioned embodiments.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A linear vibration motor, characterized in that: The invention comprises a housing, a vibrator assembly accommodated in the housing, a stator assembly for driving the vibrator assembly to vibrate, and an electromagnetic damping member, wherein the stator assembly and the electromagnetic damping member are both fixedly connected to the housing; The stator assembly includes a coil, the coil is provided on one side of the vibrator assembly along a first direction, and the electromagnetic damping member is provided on the other side thereof, wherein the first direction is perpendicular to the vibration direction of the vibrator assembly; The vibrator assembly includes a magnetic circuit system, which includes 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 component than the center of gravity of the side magnets. The magnetization direction of the center magnet is parallel to the vibration direction. The polarity of the ends of the center magnet and the two adjacent side magnets that are close to each other is the same. The two driving edges of the coil are respectively arranged opposite to the two adjacent side magnets.

2. The linear vibration motor according to claim 1, wherein: The vibrator assembly also includes a crossbeam, which is made of non-magnetic material. The crossbeam is located between two adjacent side magnetic steels. In the first direction, the crossbeam is stacked with at least one central magnetic steel, and the crossbeam is located between the central magnetic steel and the coil.

3. The linear vibration motor according to claim 2, wherein: The vibrator assembly also includes a mass block having a through hole. The crossbeam is located in the through hole and divides the through hole into at least two cavities. The edge magnetic steel is 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 arranged flush with a side of the beam close to the coil; And / or, along the first direction, the two ends of the edge magnetic steel are arranged flush with the two ends of the mass block.

5. The linear vibration motor according to claim 1, wherein: The magnetic circuit system includes two side magnetic steels and one central magnetic steel; And / or, the housing includes a first housing for fixing the electromagnetic damping element, and the first housing is made of a magnetic conductive material.

6. The linear vibration motor according to claim 2, wherein: The vibrator assembly further includes a bracket for fixing the magnetic circuit system, and the crossbeam is a part of the bracket.

7. The linear vibration motor according to claim 6, characterized in that: The bracket includes the beam and end plates located at both ends of the beam. The bracket is I-shaped, and at least two edge magnetic steels are symmetrically arranged on opposite sides of the beam. Alternatively, the bracket includes a frame portion and the crossbeam located in the frame portion, and at least two edge magnetic steels are located in the frame portion and are symmetrically arranged on opposite sides of the crossbeam.

8. The linear vibration motor according to claim 6 or 7, characterized in that: The vibrator assembly further includes a mass block, which is fixed to the bracket.

9. The linear vibration motor according to claim 1, wherein: The electromagnetic damping member is a copper sheet.

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

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