Vibration motor

Abstract

The present application relates to the technical field of motors, and provides a vibration motor. The vibration motor of the present application comprises a housing that is provided with an accommodating space, a vibration assembly that is accommodated in the accommodating space, and a stator assembly. The vibration assembly comprises a mass block spaced apart from the housing, a magnetic steel assembly fixed to the mass block, and an elastic assembly supporting the mass block in the accommodating space. The magnetic steel assembly comprises a magnetic steel fixed to the mass block, and the magnetic steel is provided with a magnetized magnetic circuit of a Halbach array structure. The magnetized magnetic circuit is designed by using a Halbach array such that the polarity distribution of the magnetic circuit is complex, effectively improving the magnetic field performance of the magnetic steel assembly, remarkably improving the driving force of the vibration motor so that the vibration motor can provide a user with strong vibration feedback, and improving the user experience.

Description

Vibration motor Technical Field

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

[0002] With the development of electronic technology, portable consumer electronic products such as mobile phones, handheld game consoles, navigation devices, and handheld multimedia entertainment devices are becoming increasingly popular. These electronic products generally use vibration motors for system feedback, such as incoming call notifications, message notifications, navigation notifications on mobile phones, and vibration feedback on game consoles. Such a wide range of applications requires excellent performance of vibration motors.

[0003] The vibration motor of the related art includes a shell with a receiving space, a vibration component located in the receiving space and a stator component fixed to the shell. The vibration component usually includes a mass block and a magnet fixed to the mass block, and the stator component includes a coil that interacts with the magnet to provide driving force. However, in the related art, the magnet has a regular shape, the magnetic pole arrangement and the magnetizing direction are single, resulting in low utilization of the magnet and a simple magnetic circuit, and the driving force of the motor is not fully exerted.

[0004] Therefore, it is necessary to provide a new vibration motor to solve the above technical problems. Technical issues

[0005] The purpose of this application is to provide a vibration motor with better magnetic field performance and stronger driving force. Technical Solutions

[0006] The technical solution of the present application is as follows: A vibration motor includes a shell having a receiving space, a vibration component and a stator component received in the receiving space, the vibration component includes a mass block spaced apart from the shell, a magnetic steel component fixed to the mass block, and an elastic component supporting the mass block in the receiving space, the magnetic steel component includes a magnet fixed to the mass block, and the magnet has a magnetized magnetic circuit with a Halbach array structure.

[0007] Preferably, the magnetizing magnetic circuit is a three-pole magnetizing magnetic circuit or a five-pole magnetizing magnetic circuit, and the magnetic steel is magnetized in one piece or in separate pieces.

[0008] Preferably, when the magnetizing magnetic circuit is a five-pole magnetizing magnetic circuit and the magnetic steel is magnetized as a whole, the magnetic steel includes a first magnetizing region, a second magnetizing region, a third magnetizing region, a fourth magnetizing region and a fifth magnetizing region arranged in sequence along the vibration direction, the magnetizing directions of the first magnetizing region and the fifth magnetizing region are the same and are both magnetized along the direction perpendicular to the vibration direction, the magnetizing direction of the third magnetizing region is opposite to that of the first magnetizing region and is magnetized along the direction perpendicular to the vibration direction, and the magnetizing directions of the second magnetizing region and the fourth magnetizing region are opposite and are both magnetized along the vibration direction.

[0009] Preferably, when the magnetizing magnetic circuit is a five-pole magnetizing magnetic circuit and the magnetic steel is split magnetized, the magnetic steel includes a first sub-magnetic steel, a second sub-magnetic steel, a third sub-magnetic steel, a fourth sub-magnetic steel, and a fifth sub-magnetic steel arranged in sequence along the vibration direction; the first sub-magnetic steel and the fifth sub-magnetic steel have the same magnetizing direction and are both magnetized along the direction perpendicular to the vibration direction; the third sub-magnetic steel has an opposite magnetizing direction to the first sub-magnetic steel and is magnetized along the direction perpendicular to the vibration direction; and the second sub-magnetic steel and the fourth sub-magnetic steel have opposite magnetizing directions and are both magnetized along the vibration direction.

[0010] Preferably, when the magnetizing magnetic circuit is a three-pole magnetizing magnetic circuit and the magnetic steel is magnetized as a whole, the magnetic steel includes a sixth magnetizing region, a seventh magnetizing region and an eighth magnetizing region arranged in sequence along the vibration direction, the magnetizing directions of the sixth magnetizing region and the eighth magnetizing region are opposite and are both magnetized perpendicular to the vibration direction, and the magnetizing direction of the seventh magnetizing region is magnetized along the vibration direction.

[0011] Preferably, the mass block is provided with a receiving hole passing through it, and the mass block includes an inner wall surrounding the receiving hole, and the magnetic steel assembly is received in the receiving hole and fixed to the inner wall; the stator assembly includes a coil assembly fixed to the shell and partially received in the receiving hole and arranged opposite to the magnetic steel assembly, and a flexible circuit board fixed to the shell and connected to the coil assembly.

[0012] Preferably, two groups of magnetic steel assemblies are provided, and the two groups of magnetic steel assemblies are respectively provided on both sides of the coil assembly along the vibration direction, and the magnetic steels of the two groups of magnetic steel assemblies are provided with the same poles facing each other.

[0013] Preferably, the magnetic steel assembly further comprises a magnetic conductive plate fixed to the inner wall, the magnetic steel is fixed to a side of the magnetic conductive plate away from the inner wall, and projections of the magnetic conductive plate and the magnetic steel along the vibration direction completely overlap.

[0014] Preferably, when the magnetic steel is magnetized as a whole, the magnetic steel is made of a magnetic steel material and a magnetic conductive material formed in one piece.

[0015] Preferably, the mass block is provided with a receiving cavity for receiving the magnetic steel assembly, and the mass block includes side walls and a bottom wall surrounding the receiving cavity; the stator assembly includes a coil assembly fixed to the shell and received in the receiving cavity, and a flexible circuit board fixed to the shell and connected to the coil assembly, and the coil assembly is arranged on the side of the magnetic steel assembly away from the bottom wall. Beneficial effects

[0016] The beneficial effects of the present application are as follows: a vibration motor includes a housing having a receiving space, a vibration assembly housed in the receiving space, and a stator assembly; the vibration assembly includes a mass block spaced apart from the housing, a magnetic steel assembly fixed to the mass block, and an elastic assembly supporting the mass block in the receiving space; the magnetic steel assembly includes a magnet fixed to the mass block, and the magnet has a magnetized magnetic circuit with a Halbach array structure. Designing the magnetized magnetic circuit using the Halbach array approach results in a complex polarity distribution, effectively improving the magnetic field performance of the magnetic steel assembly and significantly enhancing the driving force of the vibration motor, enabling the vibration motor to provide users with stronger vibration feedback and an enhanced user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of the three-dimensional structure of a vibration motor according to an embodiment of the present application;

[0018] FIG2 is a schematic diagram of an explosion structure of an embodiment in FIG1 ;

[0019] FIG3 is a schematic diagram of a partial explosion structure of an embodiment in FIG1 ;

[0020] FIG4 is a schematic diagram of the magnetic steel magnetization magnetic circuit structure of FIG3;

[0021] FIG5 is a schematic diagram of a partial explosion structure of another embodiment of FIG1;

[0022] FIG6 is a schematic diagram of the magnetic steel magnetization magnetic circuit structure of FIG5;

[0023] FIG7 is a schematic diagram of an explosion structure of another embodiment in FIG1 ;

[0024] FIG8 is a schematic diagram of a partial explosion structure of another embodiment of FIG1;

[0025] FIG9 is a schematic diagram of the magnetic steel magnetization circuit structure of FIG8;

[0026] FIG10 is a schematic diagram of the three-dimensional structure of a vibration motor according to another embodiment of the present application;

[0027] FIG11 is a schematic diagram of the explosion structure of FIG10;

[0028] FIG12 is a cross-sectional view of FIG10 along line AA;

[0029] FIG13 is a partial enlarged view of area B in FIG12 and a schematic diagram of the corresponding magnetic steel magnetization magnetic circuit structure. Modes for Carrying Out the Invention

[0030] The present application will be further described below with reference to the accompanying drawings and implementation methods.

[0031] As shown in FIG1 , an embodiment of the present application provides a vibration motor 100 , which includes a housing 10 having a receiving space, a vibration assembly 20 received in the receiving space, and a stator assembly 30 .

[0032] 2 and 7 , the housing 10 includes an upper shell 11 having a receiving space and a lower cover 12 fixed to the upper shell 11 . The lower cover 12 and the upper shell 11 are arranged to form the receiving space.

[0033] 2 , 3 , 7 and 8 , the vibration assembly 20 includes a mass block 21 spaced apart from the housing 10 , a magnetic steel assembly 22 fixed to the mass block 21 , and an elastic assembly 23 that supports the mass block 21 in the receiving space and drives the mass block 21 to reciprocate.

[0034] Referring to Figures 2 and 7 , the magnetic steel assembly 22 includes a magnet 221 fixed to the mass 21. The magnet 221 has a magnetizing magnetic circuit with a Halbach array structure. The magnetizing magnetic circuit is a five-pole magnetizing magnetic circuit, and the magnet 221 is magnetized in one piece or in a split piece. In one feasible embodiment, while maintaining the outer dimensions of the magnetic circuit, the magnetizing magnetic circuit is designed using a Halbach array method, resulting in a complex polarity distribution of the magnetic circuit. This effectively improves the magnetic field performance of the magnetic steel assembly 22 and significantly enhances the driving force of the vibration motor 100, allowing the vibration motor 100 to provide users with stronger vibration feedback and enhance the user experience.

[0035] In some embodiments, referring to Figures 2-9 , two groups of magnetic steel assemblies 22 are provided. The two groups of magnetic steel assemblies 22 are respectively disposed on either side of the coil assembly 32 along the vibration direction. The magnets 221 of the two groups of magnetic steel assemblies 22 are arranged with the same polarity facing each other. Specifically, the magnets 221 of the two groups of magnetic steel assemblies 22 are respectively a first magnet 2211 and a second magnet 2212. The first magnet 2211 and the second magnet 2212 are arranged parallel to each other and have the same magnetization structure. However, the first magnet 2211 and the second magnet 2212 are arranged with the same polarity facing each other and spaced apart on either side of the coil assembly 32.

[0036] As an embodiment, the first magnetic steel 2211 and the second magnetic steel 2212 are both integrally magnetized and the magnetization magnetic circuit is a five-pole magnetization magnetic circuit. As shown in Figures 2 to 6, each magnetic steel 221 includes a first magnetization region 1, a second magnetization region 2, a third magnetization region 3, a fourth magnetization region 4, and a fifth magnetization region 5 arranged in sequence along the vibration direction. The magnetization directions of the first magnetization region 1 and the fifth magnetization region 5 are the same and are both magnetized in the vertical vibration direction. The magnetization direction of the third magnetization region 3 is opposite to that of the first magnetization region 1 and is magnetized in the vertical vibration direction. The magnetization directions of the second magnetization region 2 and the fourth magnetization region 4 are opposite and are both magnetized in the vibration direction. Each magnetic steel 221 can be made of special-shaped magnetic steel with different magnetic pole directions at different positions, thereby achieving a complex magnetic circuit design with better performance. The integral molding and integral magnetization design of the magnetic steel 221 can reduce the difficulty of product assembly and production costs. For example, referring to FIG4 and FIG6, the N pole of the first magnetizing region 1 of the first magnetic steel 2211 is opposite to the N pole of the first magnetizing region 1 of the second magnetic steel 2212 and is spaced apart, the S pole of the third magnetizing region 3 of the first magnetic steel 2211 is opposite to the S pole of the third magnetizing region 3 of the second magnetic steel 2212 and is spaced apart, the N pole of the fifth magnetizing region 5 of the first magnetic steel 2211 is opposite to the N pole of the fifth magnetizing region 5 of the second magnetic steel 2212 and is spaced apart, and the first The north pole of the second magnetizing region 2 of the magnetic steel 2211 is arranged adjacent to the first magnetizing region 1 of the first magnetic steel 2211, the north pole of the fourth magnetizing region 4 of the first magnetic steel 2211 is arranged adjacent to the fifth magnetizing region 5 of the first magnetic steel 2211, the north pole of the second magnetizing region 2 of the second magnetic steel 2212 is arranged adjacent to the first magnetizing region 1 of the second magnetic steel 2212, and the north pole of the fourth magnetizing region 4 of the second magnetic steel 2212 is arranged adjacent to the fifth magnetizing region 5 of the second magnetic steel 2212.

[0037] As an embodiment, the first magnetic steel 2211 and the second magnetic steel 2212 are both magnetized separately, and the magnetization magnetic circuit is a five-pole magnetization magnetic circuit. As shown in Figures 7-9, the first magnetic steel 2211 and the second magnetic steel 2212 respectively include a first sub-magnetic steel a, a second sub-magnetic steel b, a third sub-magnetic steel c, a fourth sub-magnetic steel d, and a fifth sub-magnetic steel e, arranged sequentially along the vibration direction. The first sub-magnetic steel a and the fifth sub-magnetic steel e have the same magnetization direction and are magnetized perpendicular to the vibration direction. The third sub-magnetic steel c has an opposite magnetization direction to the first sub-magnetic steel a and is magnetized perpendicular to the vibration direction. The second sub-magnetic steel b and the fourth sub-magnetic steel d have opposite magnetization directions and are magnetized along the vibration direction. For example, referring to FIG9 , the N pole of the first sub-magnetic steel a in the first magnetic steel 2211 is opposite to the N pole of the first sub-magnetic steel a in the second magnetic steel 2212 and is spaced apart from each other; the S pole of the third sub-magnetic steel c in the first magnetic steel 2211 is opposite to the S pole of the third sub-magnetic steel c in the second magnetic steel 2212 and is spaced apart from each other; the N pole of the fifth sub-magnetic steel e in the first magnetic steel 2211 is opposite to the N pole of the fifth sub-magnetic steel e in the second magnetic steel 2212 and is spaced apart from each other; the first magnetic steel The N pole of the second sub-magnetic steel b in 2211 is arranged adjacent to the first sub-magnetic steel a in the first magnetic steel 2211, the N pole of the fourth sub-magnetic steel d in the first magnetic steel 2211 is arranged adjacent to the fifth sub-magnetic steel e in the first magnetic steel 2211, the N pole of the second sub-magnetic steel b in the second magnetic steel 2212 is arranged adjacent to the first sub-magnetic steel a in the second magnetic steel 2212, and the N pole of the fourth sub-magnetic steel d in the second magnetic steel 2212 is arranged adjacent to the fifth sub-magnetic steel e in the second magnetic steel 2212.

[0038] In one feasible embodiment, referring to Figures 2, 3, 7, and 8, the magnetic steel assembly 22 further includes a magnetic conductive plate 222 fixed to the inner wall 212. The magnetic steel 221 is fixed to the side of the magnetic conductive plate 222 away from the inner wall 212. The projections of the magnetic conductive plate 222 and the magnetic steel 221 along the vibration direction completely overlap. The cooperation between the magnetic conductive plate 222 and the magnetic steel 221 effectively improves the magnetic field performance of the magnetic steel assembly 22, significantly increasing the driving force of the vibration motor, allowing the vibration motor to provide users with stronger vibration feedback and enhance the user experience.

[0039] As an embodiment, referring to FIG. 2 and FIG. 3 , when the magnet 221 is magnetized as a whole, the magnet 221 can be glued to the magnetic conductive plate 222 and then assembled with the mass block 21 .

[0040] As an example, referring to Figures 5 and 6 , the magnet 221 can be formed from a magnetic material and a magnetically conductive material in one piece. By forming the magnetic material and the magnetically conductive material in one piece, the magnet 221 is magnetized and then assembled with the mass 21, which simplifies the assembly process and reduces production costs.

[0041] As an embodiment, referring to FIG. 7 and FIG. 8 , when the magnet 221 is magnetized separately, each sub-magnet is assembled separately and glued to the magnetic conductive plate 222 before being assembled to the mass block 21 .

[0042] In some embodiments, referring to Figures 1 to 9 , the mass block 21 has a receiving hole 211 extending therethrough. The mass block 21 includes an inner wall 212 surrounding the receiving hole 211. The magnetic assembly 22 is received within the receiving hole 211 and secured to the inner wall 212. The stator assembly 30 includes a coil assembly 32 secured to the housing 10 and partially received within the receiving hole 211 and disposed opposite the magnetic assembly 22; and a flexible circuit board 31 secured to the housing 10 and connected to the coil assembly 32.

[0043] Specifically, as shown in Figures 2 and 7 , the coil assembly 32 includes an iron core 322 fixed to the housing 10 and a coil 321 wound around the iron core 322. The coil 321 is electrically connected to the flexible circuit board 31. Specifically, the iron core 322 and the flexible circuit board 31 are both fixed to the lower cover 12. The coil 321 is received in the receiving hole 211 (as shown in Figures 3 and 8 ) and is positioned opposite the magnetic steel assembly 22. When the coil 321 is energized, the coil 321 and the magnetic steel assembly 22 interact to generate a driving force, causing the elastic assembly 23 to move the mass 21 and the magnetic steel assembly 22 along the vibration direction, thereby providing vibration feedback.

[0044] In some embodiments, referring to Figures 2, 3, 7 and 8, two groups of elastic components 23 are provided. The two groups of elastic components 23 are respectively provided on both sides of the mass block 21 along the vibration direction. The mass block 21 is movably connected to the shell 10 through the elastic components 23.

[0045] As shown in FIG. 10 to FIG. 13 , another vibration motor 200 is provided in one embodiment of the present application. The vibration motor 200 includes a housing 10 having a receiving space, a vibration assembly 20 received in the receiving space, and a stator assembly 30 .

[0046] 11 , the housing 10 includes an upper shell 11 having a receiving space and a lower cover 12 fixed to the upper shell 11 . The lower cover 12 and the upper shell 11 are arranged to form the receiving space.

[0047] 11 and 12 , the vibration assembly 20 includes a mass block 21 spaced apart from the housing 10 , a magnetic steel assembly 22 fixed to the mass block 21 , and an elastic assembly 23 supporting the mass block 21 in the receiving space and driving the mass block 21 to reciprocate.

[0048] 10-13 , the magnetic steel assembly 22 includes a magnetic steel 221 fixed to the mass block 21 , and the magnetic steel 221 has a magnetized magnetic circuit with a Halbach array structure.

[0049] The vibration motor 200 provided in this embodiment is different from the vibration motor 100 in Figure 1 in that the mass block 21 is provided with a receiving cavity 213 for accommodating the magnetic steel assembly 22, and the mass block 21 includes side walls 214 and a bottom wall 215 that surround and form the receiving cavity 213; the stator assembly 30 includes a coil assembly 32 fixed to the shell 10 and accommodated in the receiving cavity 213, and a flexible circuit board 31 fixed to the shell 10 and connected to the coil assembly 32, and the coil assembly 32 is arranged on the side of the magnetic steel assembly 22 away from the bottom wall 215.

[0050] The magnetic steel assembly 22 is provided in a group, and the coil assembly 32 is provided on the side of the magnetic steel assembly 22 away from the bottom wall 215. The magnetization magnetic circuit is a three-pole magnetization magnetic circuit, and the magnetic steel 221 is magnetized as a whole. The magnetic steel 221 includes a sixth magnetization region 6, a seventh magnetization region 7, and an eighth magnetization region 8 arranged in sequence along the vibration direction. The magnetization directions of the sixth magnetization region 6 and the eighth magnetization region 8 are opposite and are magnetized perpendicular to the vibration direction. The magnetization direction of the seventh magnetization region 7 is magnetized along the vibration direction. For example, referring to FIG. 13 , the magnetic steel 221 of the magnetic steel assembly 22 is the third magnetic steel. The N pole of the sixth magnetization region 6 of the third magnetic steel is provided adjacent to the coil assembly 32, the S pole of the eighth magnetization region 8 of the third magnetic steel is provided adjacent to the coil assembly 32, the N pole of the seventh magnetization region 7 is provided adjacent to the sixth magnetization region 6, and the S pole of the seventh magnetization region 7 is provided adjacent to the eighth magnetization region 8.

[0051] Please refer to FIG. 11 . Two groups of elastic components 23 are provided. The two groups of elastic components 23 are respectively provided on both sides of the mass block 21 along the vibration direction. The mass block 21 is movably connected to the housing through the elastic components 23 .

[0052] The elastic component 23 includes an elastic arm 231, a first support portion 232 extending from one end of the elastic arm 231 and connected to the housing 10, a second support portion 233 extending from the other end of the elastic arm 231 and connected to the mass 21, and a buffer block 234 provided on the second support portion 233 to buffer collisions between the first support portion 232 and the second support portion 233 and / or between the second support portion 233 and the mass 21. In one embodiment, the buffer block 234 is provided on the second support portion 233 to buffer collisions between the first support portion 232 and the second support portion 233. In one embodiment, the buffer block 234 is provided on the second support portion 233 to buffer collisions between the second support portion 233 and the mass 21. In one embodiment, the buffer block 234 is provided on the second support portion 233 to buffer collisions between the first support portion 232 and the second support portion 233 and between the second support portion 233 and the mass 21. Exemplarily, the buffer block 234 may be a soft rubber block. The provision of the buffer block 234 can reduce the collision friction between the first support portion 232 and the second support portion 233 and / or between the second support portion 233 and the mass block 21. Preferably, the thickness of the side wall connecting the mass block 21 and the elastic component 23 gradually decreases along the second support portion 233 toward the elastic arm portion 231 to prevent the mass block 21 from squeezing the elastic arm portion 231.

[0053] The above is only an implementation method of the present application. It should be pointed out that for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present application, but these all fall within the scope of protection of the present application.

Claims

1. A vibration motor comprising a housing having a receiving space, a vibration assembly received in the receiving space, and a stator assembly, wherein the vibration assembly comprises a mass block spaced apart from the housing, a magnetic steel assembly fixed to the mass block, and an elastic assembly supporting the mass block in the receiving space, characterized in that: The magnetic steel assembly includes a magnetic steel fixed to the mass block, and the magnetic steel has a magnetized magnetic circuit with a Halbach array structure.

2. The vibration motor according to claim 1, wherein: The magnetizing magnetic circuit is a three-pole magnetizing magnetic circuit or a five-pole magnetizing magnetic circuit, and the magnetic steel is magnetized in one piece or in separate pieces.

3. The vibration motor according to claim 2, wherein: When the magnetizing magnetic circuit is a five-pole magnetizing magnetic circuit and the magnetic steel is magnetized in one piece, the magnetic steel includes a first magnetizing region, a second magnetizing region, a third magnetizing region, a fourth magnetizing region, and a fifth magnetizing region arranged in sequence along the vibration direction, the first magnetizing region and the fifth magnetizing region have the same magnetizing direction and are both magnetized along the direction perpendicular to the vibration direction, the third magnetizing region has an opposite magnetizing direction to the first magnetizing region and is magnetized along the direction perpendicular to the vibration direction, and the second magnetizing region and the fourth magnetizing region have opposite magnetizing directions and are both magnetized along the vibration direction.

4. The vibration motor according to claim 2, wherein: When the magnetizing magnetic circuit is a five-pole magnetizing magnetic circuit and the magnetic steel is split-magnetized, the magnetic steel includes a first sub-magnetic steel, a second sub-magnetic steel, a third sub-magnetic steel, a fourth sub-magnetic steel, and a fifth sub-magnetic steel arranged in sequence along the vibration direction. The first sub-magnetic steel and the fifth sub-magnetic steel have the same magnetizing direction and are both magnetized along the direction perpendicular to the vibration direction. The third sub-magnetic steel has an opposite magnetizing direction to the first sub-magnetic steel and is magnetized along the direction perpendicular to the vibration direction. The second sub-magnetic steel and the fourth sub-magnetic steel have opposite magnetizing directions and are both magnetized along the vibration direction.

5. The vibration motor according to claim 2, wherein: When the magnetizing magnetic circuit is a three-pole magnetizing magnetic circuit and the magnetic steel is magnetized in one piece, the magnetic steel includes a sixth magnetizing region, a seventh magnetizing region, and an eighth magnetizing region arranged in sequence along the vibration direction. The magnetizing directions of the sixth magnetizing region and the eighth magnetizing region are opposite and are both magnetized perpendicular to the vibration direction. The magnetizing direction of the seventh magnetizing region is magnetized along the vibration direction.

6. The vibration motor according to claim 3 or 4, characterized in that: The mass block is provided with a receiving hole passing through it, and the mass block includes an inner wall surrounding the receiving hole, and the magnetic steel assembly is received in the receiving hole and fixed to the inner wall; the stator assembly includes a coil assembly fixed to the shell and partially received in the receiving hole and arranged opposite to the magnetic steel assembly, and a flexible circuit board fixed to the shell and connected to the coil assembly.

7. The vibration motor according to claim 6, wherein: The magnetic steel components are provided in two groups, and the two groups of magnetic steel components are respectively provided on both sides of the coil component along the vibration direction, and the magnetic steels of the two groups of magnetic steel components are provided with the same poles facing each other.

8. The vibration motor according to claim 7, wherein: The magnetic steel assembly further includes a magnetic conductive plate fixed to the inner wall. The magnetic steel is fixed to a side of the magnetic conductive plate away from the inner wall. Projections of the magnetic conductive plate and the magnetic steel along the vibration direction completely overlap.

9. The vibration motor according to claim 7, wherein: When the magnetic steel is magnetized in one piece, the magnetic steel is made of a magnetic steel material and a magnetic conductive material formed in one piece.

10. The vibration motor according to claim 5, wherein: The mass block is provided with a receiving cavity for accommodating the magnetic steel assembly, and the mass block includes side walls and a bottom wall surrounding the receiving cavity; the stator assembly includes a coil assembly fixed to the shell and accommodated in the receiving cavity, and a flexible circuit board fixed to the shell and connected to the coil assembly, and the coil assembly is arranged on the side of the magnetic steel assembly away from the bottom wall.

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