Linear vibration motor

Abstract

The application provides a linear vibration motor, which comprises a shell, a stator and a vibrator installed in the shell, the vibrator comprising a mass block, a driving magnetic steel connected with the mass block and a first direction inner magnetic steel fixed to the mass block and close to left and right shells; the stator comprising a driving coil fixed to the shell, a first direction outer magnetic steel fixed to the left and right shells, a second direction magnetic steel fixed to front and back shells and a third direction magnetic steel fixed to upper and lower shells; the driving coil drives the vibrator to vibrate along the first direction when electrified; the first direction outer and inner magnetic steels have the same opposite surface magnetic poles; the second direction magnetic steel has the same opposite surface magnetic poles with the first direction outer and inner magnetic steels; the third direction magnetic steel generates a third direction suspension force with the first direction outer and inner magnetic steels to make the vibrator suspend in the third direction. In the application, the magnetic suspension generates stable repulsion force during the movement of the vibrator to make the motor vibrator suspend, realize complete non-contact vibration and remove the spring of the traditional motor, so that the vibration state is more stable.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electronic products, and particularly relates to a linear vibration motor. BACKGROUND

[0002] With the rapid iteration of portable consumer electronics, consumer demand for immersive haptic experiences on devices continues to escalate. Mobile devices, represented by smartphones, handheld game consoles and multimedia entertainment terminals, are driving the development of haptic feedback technology towards higher performance. As the core executive component, the linear vibration motor provides precise vibration feedback function, and through structural innovation and process optimization, it realizes life extension to meet the dual demands of service life and user experience of modern electronic products.

[0003] At present, the linear vibration motor used in electronic products generally includes a vibrator and a spring part accommodated in a shell. The spring part is used to suspend the vibrator in the shell and provide a restoring force and positioning guide for the vibrator. The spring part is usually made of sheet metal material, which is connected between the vibrator and the shell through a connecting shaft. The connecting shaft is used to provide support force for the vibrator. At the same time, the connecting shaft needs to be provided with corresponding bearing and sliding channel structure on the vibrator to realize the horizontal recovery of the spring part, so as to complicate the structure of the vibrator and the entire linear vibration motor, which is not convenient for the diversified design of the spring part. Moreover, the spring will fail and be subject to elastic fatigue after long-term use, thereby affecting the performance and service life of the motor.

[0004] Therefore, it is necessary to provide a new linear vibration motor to solve the above problems. SUMMARY

[0005] The present application provides a new linear vibration motor, which utilizes the principle that same poles repel each other between magnetic steels, and the repulsion force between the magnetic steels provides a restoring force. The synergistic effect between the magnetic steels makes the vibrator suspended in the shell, so as to solve the problem of low service life of the existing linear vibration motor.

[0006] In order to achieve the above object, the technical scheme of the present application is as follows: a linear vibration motor, comprising: a shell, the shell comprising a left shell and a right shell oppositely arranged along a first direction, a front shell and a rear shell oppositely arranged along a second direction, and an upper shell and a lower shell oppositely arranged along a third direction, the front shell, the rear shell, the left shell, the right shell, the upper shell and the lower shell enclosing a receiving space, the linear vibration motor further comprising a vibrator and a stator received in the receiving space, the vibrator comprising a mass block, a driving magnetic steel fixedly connected with the mass block, and a first direction inner magnetic steel fixedly arranged on two sides of the mass block close to the left shell and the right shell along the first direction; the stator comprising a driving coil fixedly arranged on the shell, a first direction outer magnetic steel fixedly arranged on the left shell and the right shell, a second direction magnetic steel fixedly arranged on the front shell and the rear shell, and a third direction magnetic steel fixedly arranged on the upper shell and the lower shell, the driving coil driving the vibrator to vibrate along the first direction when energized, the first direction outer magnetic steel having the same opposite surface magnetic pole as the first direction inner magnetic steel, the second direction magnetic steel having the same opposite surface magnetic pole as the first direction outer magnetic steel and the first direction inner magnetic steel, and the third direction magnetic steel generating a suspension force along the third direction and making the vibrator suspended between the third direction magnetic steel in the third direction.

[0007] Preferably, the first direction outer magnetic steel comprises a first direction outer first magnetic steel, a first direction outer second magnetic steel and a first direction outer third magnetic steel arranged in sequence along the second direction, and the magnetization directions of the first direction outer first magnetic steel, the first direction outer second magnetic steel and the first direction outer third magnetic steel are rotated counterclockwise by 90 degrees or rotated clockwise by 90 degrees in sequence when viewed along the third direction; the first direction inner magnetic steel comprises a first direction inner first magnetic steel, a first direction inner second magnetic steel and a first direction inner third magnetic steel arranged in sequence along the second direction, and the magnetization directions of the first direction inner first magnetic steel, the first direction inner second magnetic steel and the first direction inner third magnetic steel are rotated clockwise by 90 degrees or rotated counterclockwise by 90 degrees in sequence when viewed along the third direction.

[0008] Preferably, the first direction outer second magnetic steel and the first direction inner second magnetic steel repel each other along the first direction.

[0009] Preferably, the first direction outer magnetic steel and the first direction inner magnetic steel are magnetized in opposition along the second direction, and the opposite surface magnetic poles of the first direction outer magnetic steel and the first direction inner magnetic steel are the same along the second direction.

[0010] Preferably, the first direction outer magnetic steel is single direction magnetized, the first direction inner magnetic steel is opposite direction magnetized along the second direction, the first direction outer magnetic steel is fixed on the surface of the left shell, and the magnetic poles of the surfaces of the first direction inner magnetic steel close to the front shell and the rear shell along the second direction are the same as the magnetic pole of the surface of the second direction magnetic steel away from the shell.

[0011] Preferably, the second direction magnetic steel is single direction magnetized along the second direction, the surface of the second direction magnetic steel away from the rear shell is the same as the magnetic poles of the surfaces of the first direction outer magnetic steel and the first direction inner magnetic steel close to the rear shell, and the surface of the second direction magnetic steel away from the front shell is the same as the magnetic poles of the surfaces of the first direction outer magnetic steel and the first direction inner magnetic steel close to the front shell.

[0012] Preferably, the second direction magnetic steel comprises a second direction first magnetic steel, a second direction second magnetic steel and a second direction third magnetic steel arranged along the third direction in sequence, and the magnetization directions of the second direction first magnetic steel, the second direction second magnetic steel and the second direction third magnetic steel are sequentially rotated clockwise by 90 degrees or sequentially rotated counterclockwise by 90 degrees along the first direction, the surface of the second direction second magnetic steel away from the rear shell is the same as the magnetic poles of the surfaces of the first direction outer first magnetic steel and the first direction inner first magnetic steel close to the rear shell, and the surface of the second direction second magnetic steel away from the front shell is the same as the magnetic poles of the surfaces of the first direction outer third magnetic steel and the first direction inner third magnetic steel close to the front shell.

[0013] Preferably, the third direction magnetic steel is single direction magnetized along the third direction, the surface of the third direction magnetic steel away from the shell is the same as the magnetic poles of the surfaces of the first direction outer first magnetic steel and the first direction outer third magnetic steel close to the first direction outer second magnetic steel, the surface of the first direction outer second magnetic steel close to the first direction inner magnetic steel, the surfaces of the first direction inner first magnetic steel and the first direction inner third magnetic steel close to the first direction inner second magnetic steel, and the surface of the first direction inner second magnetic steel close to the first direction outer magnetic steel.

[0014] Preferably, the third direction magnetic steel comprises a third direction first magnetic steel, a third direction second magnetic steel and a third direction third magnetic steel arranged in sequence along the second direction, and the magnetization directions of the third direction first magnetic steel, the third direction second magnetic steel and the third direction third magnetic steel are rotated clockwise by 90 degrees or rotated counterclockwise by 90 degrees in sequence along the first direction, and the pole of the face of the third direction second magnetic steel away from the shell is the same as the poles of the face of the first direction outer first magnetic steel and the first direction outer third magnetic steel close to the first direction outer second magnetic steel, the face of the first direction outer second magnetic steel close to the first direction inner magnetic steel, the face of the first direction inner first magnetic steel and the first direction inner third magnetic steel close to the first direction inner second magnetic steel, and the face of the first direction inner second magnetic steel close to the first direction outer magnetic steel.

[0015] Preferably, the third direction magnetic steel is magnetized in a single direction along the third direction, and the face of the third direction magnetic steel close to the shell has the same pole as the face of the first direction outer magnetic steel and the first direction inner magnetic steel close to the second direction magnetic steel.

[0016] Preferably, the third direction magnetic steel comprises a first Z direction magnetic steel and a second Z direction magnetic steel fixed to the upper shell and close to the left shell, a third Z direction magnetic steel and a fourth Z direction magnetic steel fixed to the upper shell and close to the right shell, a fifth Z direction magnetic steel and a sixth Z direction magnetic steel fixed to the lower shell and close to the left shell, and a seventh Z direction magnetic steel and an eighth Z direction magnetic steel fixed to the lower shell and close to the right shell, and the third direction magnetic steel is magnetized in a single direction along the third direction, and the face of the third direction magnetic steel away from the shell has the same pole as the face of the first direction outer first magnetic steel and the first direction outer third magnetic steel close to the second direction magnetic steel, the face of the first direction inner first magnetic steel and the first direction inner third magnetic steel close to the second direction magnetic steel, and the face of the second direction magnetic steel away from the shell.

[0017] Preferably, the driving coil is fixed to the lower shell.

[0018] Preferably, the driving coil comprises a driving coil first side, a driving coil second side, a driving coil third side and a driving coil fourth side connected in sequence, and is fixed to the front shell, the upper shell, the rear shell and the lower shell respectively.

[0019] Preferably, the driving coil comprises a first driving coil and a second driving coil fixed to the lower shell side by side along the first direction.

[0020] Preferably, the driving coil comprises an upper driving coil and a lower driving coil placed along the first direction and fixed to the upper shell and the lower shell respectively.

[0021] Preferably, the driving coils comprise the first driving coil and the second driving coil fixed to the lower shell and arranged side by side along the first direction, and the third driving coil and the fourth driving coil fixed to the upper shell and arranged side by side along the first direction.

[0022] Preferably, the driving magnetic steel comprises three magnetic steels arranged in sequence along the first direction, and the magnetization directions of the three magnetic steels are sequentially rotated by 90 degrees clockwise or 90 degrees counterclockwise as viewed along the second direction.

[0023] Preferably, the driving magnetic steel is magnetized along the first direction in a top-to-top manner, and the magnetic poles of the two end faces of the driving magnetic steel along the first direction are the same.

[0024] Preferably, the driving magnetic steel comprises five magnetic steels arranged in sequence along the first direction, and the magnetization directions of the five magnetic steels are sequentially rotated by 90 degrees clockwise or 90 degrees counterclockwise as viewed along the second direction.

[0025] Preferably, the driving magnetic steel comprises six magnetic steels, which are divided into an upper driving magnetic steel and a lower driving magnetic steel along the third direction, the upper driving magnetic steel and the lower driving magnetic steel each comprise three magnetic steels arranged in sequence along the first direction, and the magnetization directions of the three magnetic steels of the upper driving magnetic steel are sequentially rotated by 90 degrees clockwise or 90 degrees counterclockwise as viewed along the second direction, and the magnetization directions of the three magnetic steels of the lower driving magnetic steel are sequentially rotated by 90 degrees counterclockwise or 90 degrees clockwise as viewed along the second direction.

[0026] Preferably, the driving magnetic steel comprises three magnetic steels arranged in sequence along the first direction, the three magnetic steels are multi-pole magnetic steels formed integrally, and the magnetization directions of the three magnetic steels are sequentially rotated by 180 degrees as viewed along the third direction.

[0027] Preferably, the mass block comprises a mass block first portion, a mass block second portion, and a mass block third portion in sequence along the first direction, the mass block first portion and the mass block third portion are connected to the magnetic steels along the first direction, the linear vibration motor comprises a metal sheet, the metal sheet comprises a vibrator portion metal sheet and a stator portion metal sheet, the vibrator portion metal sheet is fixedly connected to the mass block first portion, the mass block third portion, and the magnetic steels along the first direction, and the stator portion metal sheet is fixed to the lower shell and arranged at both sides of the driving coils along the first direction.

[0028] Preferably, the linear vibration motor comprises a metal sheet, the metal sheet comprises a first metal sheet, a second metal sheet, a third metal sheet and a fourth metal sheet, the first metal sheet and the second metal sheet are fixed to the upper shell and located on both sides of the driving coil, the third metal sheet and the fourth metal sheet are fixed to the lower shell and located on both sides of the driving coil.

[0029] Preferably, the mass block comprises a first mass block part, a second mass block part and a third mass block part in sequence along the first direction, the first mass block part and the third mass block part are connected with the first direction inner magnetic steel along the first direction, the linear vibration motor comprises a metal sheet, the metal sheet is fixedly connected with the first mass block part, the third mass block part and the first direction inner magnetic steel.

[0030] Preferably, the mass block comprises a first mass block part, a second mass block part and a third mass block part in sequence along the first direction, the first mass block part and the third mass block part are connected with the first direction inner magnetic steel along the first direction, the linear vibration motor comprises a metal sheet, the metal sheet comprises a vibrator part metal sheet and a stator part metal sheet, the vibrator part metal sheet is fixedly connected with the first mass block part, the third mass block part and the first direction inner magnetic steel, the stator part metal sheet comprises a first metal sheet, a second metal sheet, a third metal sheet and a fourth metal sheet, the first metal sheet is located between the first Z-direction magnetic steel and the second Z-direction magnetic steel and is fixed to the upper shell, the second metal sheet is located between the third Z-direction magnetic steel and the fourth Z-direction magnetic steel and is fixed to the upper shell, the third metal sheet is located between the fifth Z-direction magnetic steel and the sixth Z-direction magnetic steel and is fixed to the lower shell, and the fourth metal sheet is located between the seventh Z-direction magnetic steel and the eighth Z-direction magnetic steel and is fixed to the lower shell.

[0031] Preferably, the metal sheet is a copper sheet.

[0032] The advantages of the present application are that: through the magnetic suspension structure design, the non-contact vibration of the vibrator is realized, and the friction loss and life limitation problems caused by the traditional motor relying on the spring structure are effectively solved. The stable repulsive force generated by the magnetic suspension system provides the suspension force for the vibrator, and the elastic property of the magnetic steel repulsive force replaces the traditional spring, thereby avoiding the aging and fatigue problems of the mechanical spring, and at the same time, the suspension force can be flexibly adjusted according to the requirements, and the precise control ability of the vibration frequency is improved. In the driving system, the coil with periodic change current generates periodic driving force in the magnetic field, which cooperates with the magnetic suspension system to realize the reciprocating vibration of the vibrator. In addition, the damping force generated by the metal sheet effectively suppresses the overshoot of the vibrator, and ensures the stability of the vibration process. The overall structure is designed by integrating the magnetic suspension and electromagnetic driving, which eliminates the complex components such as traditional mechanical spring and bearing, makes the equipment more compact and maintenance more convenient, at the same time, reduces the energy consumption and operation noise, has the advantages of environmental protection and energy saving, and has significant practicality and popularization value. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the linear vibration motor of the first embodiment of the present application;

[0034] Figure 2 It is Figure 1 a schematic diagram of the explosion structure of the linear vibration motor;

[0035] Figure 3 It is a sectional view of the linear vibration motor of the first embodiment of the present application along Figure 1 the A-A line;

[0036] Figure 4 It is a sectional view of the linear vibration motor of the first embodiment of the present application along Figure 1 the B-B line;

[0037] Figure 5 It is a sectional view of the linear vibration motor of the first embodiment of the present application along Figure 1 the C-C line;

[0038] Figure 6 It is a sectional view of the linear vibration motor of the second embodiment of the present application along Figure 1 the A-A line;

[0039] Figure 7 It is a sectional view of the linear vibration motor of the second embodiment of the present application along Figure 1 the B-B line;

[0040] Figure 8 It is a sectional view of the linear vibration motor of the second embodiment of the present application along Figure 1 the C-C line;

[0041] Figure 9 It is a sectional view of the linear vibration motor of the third embodiment of the present application alongFigure 1 a cross-sectional view taken along line A-A in FIG. 10;

[0042] Figure 10 a cross-sectional view taken along line B-B in FIG. 10; Figure 1 a cross-sectional view taken along line C-C in FIG. 10;

[0043] Figure 11 a cross-sectional view taken along line A-A in FIG. 11; Figure 1 a cross-sectional view taken along line B-B in FIG. 11;

[0044] Figure 12 a cross-sectional view taken along line C-C in FIG. 11; Figure 1 a cross-sectional view taken along line A-A in FIG. 12;

[0045] Figure 13 a cross-sectional view taken along line B-B in FIG. 12; Figure 1 a cross-sectional view taken along line C-C in FIG. 12;

[0046] Figure 14 a cross-sectional view taken along line A-A in FIG. 13; Figure 1 a cross-sectional view taken along line B-B in FIG. 13;

[0047] Figure 15 a cross-sectional view taken along line C-C in FIG. 13; Figure 1 a cross-sectional view taken along line A-A in FIG. 14;

[0048] Figure 16 a cross-sectional view taken along line B-B in FIG. 14; Figure 1 a cross-sectional view taken along line C-C in FIG. 14;

[0049] Figure 17 a cross-sectional view taken along line A-A in FIG. 15; Figure 1 a cross-sectional view taken along line B-B in FIG. 15;

[0050] Figure 18 a cross-sectional view taken along line C-C in FIG. 15; Figure 1 a cross-sectional view taken along line A-A in FIG. 16;

[0051] Figure 19 a cross-sectional view taken along line B-B in FIG. 16; Figure 1 a cross-sectional view taken along line C-C in FIG. 16;

[0052] Figure 20 a cross-sectional view taken along line A-A in FIG. 17; Figure 1 a cross-sectional view taken along line B-B in FIG. 17;

[0053] Figure 21 a cross-sectional view taken along line C-C in FIG. 17; Figure 1 a cross-sectional view taken along line A-A in FIG. 18;

[0054] Figure 22 The linear vibration motor of the seventh embodiment of the present invention is along Figure 1 A sectional view of the BB line in the middle;

[0055] Figure 23 The linear vibration motor of the seventh embodiment of the present invention is along Figure 1 A cross-sectional view of the CC line in the diagram;

[0056] Figure 24 The linear vibration motor of the eighth embodiment of the present invention is along Figure 1 A sectional view of line AA in the diagram;

[0057] Figure 25 The linear vibration motor of the eighth embodiment of the present invention is along Figure 1 A sectional view of the BB line in the middle;

[0058] Figure 26 The linear vibration motor of the eighth embodiment of the present invention is along Figure 1 A cross-sectional view of the CC line. Detailed Implementation

[0059] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] Please also refer to Figures 1-5 The first embodiment of the present invention provides a linear vibration motor 100, including a housing 1, an oscillator 2 and a stator 3 installed in the housing 1.

[0061] The housing includes a left shell 11 and a right shell 12 arranged opposite each other along a first direction X, a front shell 13 and a rear shell 14 arranged opposite each other along a second direction Y, and an upper shell 15 and a lower shell 16 arranged opposite each other along a third direction Z. The first direction X is the vibration direction of the linear vibration motor 100, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The left shell 11, right shell 12, front shell 13, rear shell 14, upper shell 15, and lower shell 16 enclose a receiving space 17 to house the vibrator 2 and the stator 3. The stator 3 is fixedly mounted on the housing 1.

[0062] The oscillator 2 is suspended within the housing space 17 enclosed by the housing 1. The oscillator 2 vibrates along the first direction X, thereby providing vibration to the linear vibration motor 100. The oscillator 2 includes a mass block 21, a drive magnet 22 fixedly connected to the mass block 21, and a first direction inner magnet 23 fixed along the first direction X to both sides of the mass block 21 near the left housing 11 and the right housing 12.

[0063] The stator 3 comprises a driving coil 31 fixed to the lower shell 16, first direction outer magnetic steel 32 fixed to the left shell 11 and the right shell 12 respectively, second direction magnetic steel 33 fixed to the front shell 13 and the rear shell 14 respectively, and third direction magnetic steel 34 fixed to the upper shell 15 and the lower shell 16 respectively. When the driving coil 31 is energized, the vibrator 2 vibrates along the first direction X, the first direction outer magnetic steel 32 has the same opposite surface magnetic pole as the first direction inner magnetic steel 23, the second direction magnetic steel 33 has the same opposite surface magnetic pole as the first direction outer magnetic steel 32 and the first direction inner magnetic steel 23, and the third direction magnetic steel 34 generates a suspension force along the third direction Z and makes the vibrator 2 suspended between the third direction magnetic steel 34 in the third direction Z.

[0064] The present application realizes the non-contact vibration of the vibrator 2 by the magnetic suspension structure, effectively reduces the mechanical wear and noise, continuously generates the magnetic suspension force by the same pole repulsion magnetic steel to ensure the stable operation of the system, replaces the traditional mechanical spring structure, and improves the machine life and stable reliability.

[0065] Figures 3-5The arrow on the middle magnetic steel indicates the direction of the magnetic pole, and the direction of the arrow is the N pole. In other alternative embodiments, all the magnetic pole directions can be set in the opposite direction. The first direction inner magnetic steel 23 is three magnetized segments. In this embodiment, the first direction inner magnetic steel 23 is three pieces that are magnetized and then spliced. In other alternative embodiments, it can also be a whole magnetic steel that is magnetized in different regions and segments. The first direction outer magnetic steel 32 is three magnetized segments. In this embodiment, the first direction outer magnetic steel 32 is three pieces that are magnetized and then spliced. In other alternative embodiments, it can also be a whole magnetic steel that is magnetized in different regions and segments. The first direction outer magnetic steel 32 includes a first direction outer first magnetic steel 321, a first direction outer second magnetic steel 322, and a first direction outer third magnetic steel 323 arranged in sequence along the second direction Y. As viewed along the third direction Z, the magnetization directions of the first direction outer first magnetic steel 321, the first direction outer second magnetic steel 322, and the first direction outer third magnetic steel 323 rotate counterclockwise by 90 degrees or rotate clockwise by 90 degrees in sequence. In this embodiment, the first direction outer first magnetic steel 321 is magnetized along the second direction Y, the magnetization direction of the first direction outer second magnetic steel 322 rotates clockwise by 90 degrees (magnetized along the first direction X) from the magnetization direction of the first direction outer first magnetic steel 321, and the magnetization direction of the first direction outer third magnetic steel 323 rotates counterclockwise by 90 degrees (magnetized along the second direction Y) from the magnetization direction of the first direction outer second magnetic steel 322, i.e., the magnetization direction of the first direction outer third magnetic steel 323 is opposite to the magnetization direction of the first direction outer first magnetic steel 321. The rotation direction of the first direction outer magnetic steel 32 on the other side is clockwise. The first direction outer first magnetic steel 321 and the first direction outer third magnetic steel 323 have a strengthening effect on the first direction outer second magnetic steel 322, which can make the magnetic force lines of the first direction outer second magnetic steel 322 more concentrated in the first direction X, thereby generating stronger magnetic levitation force.

[0066] The first direction inner magnetic steel 23 comprises a first direction inner first magnetic steel 231, a first direction inner second magnetic steel 232 and a first direction inner third magnetic steel 233 arranged in sequence along the second direction Y. As viewed along the third direction Z, the magnetization directions of the first direction inner first magnetic steel 231, the first direction inner second magnetic steel 232 and the first direction inner third magnetic steel 233 rotate in sequence by 90 degrees clockwise or in sequence by 90 degrees counterclockwise. In the embodiment, the first direction inner first magnetic steel 231 is magnetized along the second direction Y, the magnetization direction of the first direction inner second magnetic steel 232 rotates by 90 degrees clockwise (magnetized along the first direction X) from the magnetization direction of the first direction inner first magnetic steel 231, and the magnetization direction of the first direction inner third magnetic steel 233 rotates by 90 degrees clockwise (magnetized along the second direction Y) from the magnetization direction of the first direction inner second magnetic steel 232, i.e., the magnetization direction of the first direction inner third magnetic steel 233 is opposite to the magnetization direction of the first direction inner first magnetic steel 231. The first direction inner magnetic steel 23 on the other side rotates in the opposite direction, i.e., counterclockwise. The first direction inner first magnetic steel 231 and the first direction inner third magnetic steel 233 have a reinforcing effect on the first direction inner second magnetic steel 232, which can make the magnetic force lines of the first direction inner second magnetic steel 232 more concentrated in the first direction X, thereby generating a stronger magnetic levitation force. The first direction outer second magnetic steel 322 and the first direction inner second magnetic steel 232 repel each other along the first direction X, generating a levitation force along the first direction X and making the oscillator 2 levitate in the first direction X between the first direction outer magnetic steels 32.

[0067] The second direction magnetic steel 33 is unidirectionally magnetized along the second direction Y. The poles of the face of the second direction magnetic steel 33 away from the rear shell 14 are the same as the poles of the faces of the first direction outer first magnetic steel 321 and the first direction inner first magnetic steel 231 close to the rear shell 14, and the poles of the face of the second direction magnetic steel 33 away from the front shell 13 are the same as the poles of the faces of the first direction outer third magnetic steel 323 and the first direction inner third magnetic steel 233 close to the front shell 13, generating a levitation force along the second direction Y and making the oscillator 2 levitate in the second direction Y between the second direction magnetic steels 33. The unidirectional magnetization process has lower requirements for equipment precision and operation, does not require a complex multi-direction magnetization device, and can directly complete magnetization by applying a magnetic field in a single direction, thereby significantly reducing production difficulty and cost.

[0068] The third direction magnetic steel 34 is single direction magnetized along the third direction Z, the face of the third direction magnetic steel 34 away from the shell 1 is same magnetic pole with the face of the first direction outer first magnetic steel 321 and the first direction outer third magnetic steel 323 close to the first direction outer second magnetic steel 322, the face of the first direction outer second magnetic steel 322 close to the first direction inner magnetic steel 23, the face of the first direction inner first magnetic steel 231 and the first direction inner third magnetic steel 233 close to the first direction inner second magnetic steel 232, the face of the first direction inner second magnetic steel 232 close to the first direction outer magnetic steel 32, generating suspension force along the first direction X and the third direction Z and making the vibrator 2 suspended between the first direction outer magnetic steel 32 and the third direction magnetic steel 34 along the first direction X and the third direction Z. The single direction magnetization process has lower requirement for equipment precision and operation, does not need complex multi-direction magnetization device, can directly complete magnetization through single direction applied magnetic field, significantly reduces production difficulty and cost.

[0069] The driving coil 31 is fixed on the lower shell 16 below the driving magnetic steel 22, and the driving coil 31 passes through alternating current. The driving coil 31 passes through alternating current, cuts the magnetic induction line of the driving magnetic steel 22 to generate induced electromotive force, so that the driving magnetic steel 22 and the mass block 21 and the first direction inner magnetic steel 23 fixed therewith reciprocate along the first direction X, providing motor vibration.

[0070] The driving magnetic steel 22 includes three magnetic steels arranged in sequence along the first direction X, and the magnetization direction of the three magnetic steels is sequentially rotated clockwise by 90 degrees or counterclockwise by 90 degrees along the second direction Y, the first magnetic steel close to the left shell 11 along the first direction X is the first magnetic steel, the second magnetic steel is magnetized along the first direction X, the third magnetic steel is magnetized along the third direction Z, and the direction of the third magnetic steel is opposite to that of the first magnetic steel. The driving magnetic steel 22 interacts with the driving coil 31, enhances the electromagnetic driving force, and thus improves the vibration efficiency of the vibrator 2.

[0071] The mass block 21 sequentially comprises a mass block first portion 2111, a mass block second portion 2112 and a mass block third portion 2113 along the first direction X, the mass block first portion 2111 and the mass block third portion 2113 are in contact with the first direction inner magnetic steel 23 along the first direction X, the mass block second portion 2112 is partially hollowed out close to the lower shell 16, the hollowed-out portion is used to place the driving magnetic steel 22, the projection area of the mass block first portion 2111, the projection area of the mass block third portion 2113 and the projection area of the first direction inner magnetic steel 23 along the first direction X are consistent in size. The mass block first portion 2111 and the mass block third portion 2113 can provide greater weight for the vibrator 2 and improve the vibration amount of the vibration motor 100. Similarly, the mass block second portion 2112 not only can provide greater weight for the vibrator 2 and improve the vibration amount of the vibration motor 100, but also can fix the driving magnetic steel 22.

[0072] The metal sheet 4 is a copper sheet, and the metal sheet 4 comprises a vibrator portion metal sheet 41 and a stator portion metal sheet 42, the vibrator portion metal sheet 41 is fixedly connected with the mass block first portion 2111, the mass block third portion 2113 and the first direction inner magnetic steel 23, and the vibrator portion metal sheet 41 is wrapped around the mass block first portion 2111, the mass block third portion 2113 and the first direction inner magnetic steel 23 close to the front shell 13, the rear shell 14, the upper shell 15 and the lower shell 16; the stator portion metal sheet 42 is fixed to the lower shell 16 and is arranged on both sides of the driving coil 31 along the first direction X. The damping effect of the metal sheet 4 helps the vibrator 2 to quickly change from a moving state to a stopped state.

[0073] According to the magnetic suspension principle, the vibrator 2 can be suspended in the accommodation space 17 formed by the shell 1, and since the repulsion force is greater when the same-pole magnetic steels are closer, the vibrator 2 is effectively prevented from colliding with the first direction outer magnetic steel 32. The first direction outer magnetic steel 32, the first direction inner magnetic steel 23, the second direction magnetic steel 33 and the third direction magnetic steel 34 generate stable repulsion force to ensure the stability of the relative position between the vibrator 2 arranged on the shell 1 and the shell 1, realize complete non-contact vibration and remove the spring of the traditional motor. In combination with the damping effect of the metal sheet 4, the vibrator 2 can quickly change from a moving state to a stopped state, realize efficient energy dissipation, quickly suppress vibration and achieve high-precision stability.

[0074] Please refer to Figures 6-8, the arrow on the magnetic steel indicates the direction of the magnetic pole, and the direction of the arrow is the N pole. In other optional embodiments, all the magnetic pole directions can be set in the opposite direction. The main difference between the second embodiment of the application and the first embodiment is that the driving coil 31a is wrapped around the driving magnetic steel 22a. The driving coil 31a includes a driving coil first side 3111, a driving coil second side 3112, a driving coil third side 3113, and a driving coil fourth side 3114 connected in sequence, and is fixed with the front shell 13a, the upper shell 15a, the rear shell 14a, and the lower shell 16a respectively. The driving coil 31a is wrapped around the driving magnetic steel 22a, which is more compact in structure and has higher driving efficiency. The driving coil 31a is subjected to a stronger Ampere force in the magnetic field generated by the driving magnetic steel 22a after being energized, and the driving magnetic steel 22a is subjected to the reaction force of the stronger Ampere force, thereby driving the vibrator 2a to reciprocate along the first direction X, further enhancing the vibration feeling of the motor.

[0075] The driving magnetic steel 22a is magnetized along the first direction X, and the two end faces of the driving magnetic steel 22a along the first direction X have the same magnetic pole. The installation and fixation of one magnetic steel in the driving magnetic steel are simpler, reducing the process complexity required for the alignment and fixation of multiple magnetic steels and reducing the cost.

[0076] The mass block 21a includes a left mass block 2121 and a right mass block 2122 arranged in sequence and connected with the driving magnetic steel 22a in the middle. The projection area of the left mass block 2121, the projection area of the right mass block 2122, and the projection area of the driving magnetic steel 22a along the first direction X are consistent in size. The left mass block 2121 and the right mass block 2122 reduce the volume of the vibrator 2a, thereby leaving space for the driving coil 31a to wrap around the driving magnetic steel 22a.

[0077] The metal sheet 4a is a copper sheet, and the metal sheet 4a includes a first metal sheet 421, a second metal sheet 422, a third metal sheet 423, and a fourth metal sheet 424. The first metal sheet 421 and the second metal sheet 422 are fixed to the upper shell 15a and located on both sides of the driving coil 31a. The third metal sheet 423 and the fourth metal sheet 424 are fixed to the lower shell 16a and located on both sides of the driving coil 31a. The four copper metal sheets significantly enhance the damping effect while taking into account the structural reliability and flexibility. This design not only improves the stability of the vibration system, but also provides protection for the efficient operation and long-term durability of the equipment.

[0078] The first direction outer magnetic steel 32a, the first direction inner magnetic steel 23a, the second direction magnetic steel 33a and the third direction magnetic steel 34a generate stable repulsive force to ensure the stability of the relative position between the vibrator 2a arranged in the shell 1a and the shell 1a, realize complete non-contact vibration and remove the spring of the traditional motor. The driving coil 31a is arranged around the driving magnetic steel 22a, so that when the driving coil 31a passes through the alternating current, the induced electromotive force generated in the driving coil 31a is stronger, further enhancing the vibration feeling of the motor. The mass block 21a includes a left mass block 2121 and a right mass block 2122, so that the volume of the vibrator 2a is reduced, thereby leaving space for the driving coil 31a around the driving magnetic steel 22a.

[0079] Please refer to Figures 9-11 , the arrows on the magnetic steel in the figure represent the direction of the magnetic pole, and the direction of the arrow is the N pole. In other optional embodiments, all the magnetic pole directions can also be set to the opposite direction. In the third embodiment of the present application, the main difference from the first embodiment is that the driving coil 31b includes a first driving coil 3121 and a second driving coil 3122 fixed side by side along the first direction X on the lower shell 16b. The number of driving coils 31b is increased to two, so that when the driving coil 31b passes through the alternating current, the induced electromotive force generated is stronger, further enhancing the vibration feeling of the motor. The driving magnetic steel 22b includes five magnetic steels arranged in sequence along the first direction X. As seen along the second direction Y, the magnetization directions of the five magnetic steels are rotated clockwise by 90 degrees or rotated counterclockwise by 90 degrees in sequence. The first magnetic steel is arranged close to the left shell 11b along the first direction X, the magnetization direction of the second magnetic steel is rotated clockwise by 90 degrees from the magnetization direction of the first magnetic steel (magnetized along the first direction X), the magnetization direction of the third magnetic steel is rotated clockwise by 90 degrees from the magnetization direction of the second magnetic steel (magnetized along the third direction Z), the direction is opposite to the first magnetic steel, the magnetization direction of the fourth magnetic steel is rotated clockwise by 90 degrees from the magnetization direction of the third magnetic steel (magnetized along the first direction X), the direction is opposite to the second magnetic steel, and the magnetization direction of the fifth magnetic steel is rotated clockwise by 90 degrees from the magnetization direction of the fourth magnetic steel (magnetized along the third direction Z), the direction is the same as the first magnetic steel. The driving magnetic steel 22b contains five magnetic steels, which can further optimize the magnetic field distribution and obtain higher magnetic field strength. The driving magnetic steel 22b contains five magnetic steels, which cooperates with the driving coil 31b including the first driving coil 3121 and the second driving coil 3122, two driving coils, to make the vibrator 2b vibrate along the first direction X, generating stronger vibration feeling.

[0080] The mass block 21b includes a mass block first portion 2111b, a mass block second portion 2112b and a mass block third portion 2113b in sequence along the first direction X, the mass block first portion 2111b and the mass block third portion 2113b are in contact with the first direction inner magnetic steel 23b along the first direction X, the mass block second portion 2112b is partially hollowed out close to the lower shell 16b, the hollowed-out portion is used to place the driving magnetic steel 22b, and the projection area of the mass block first portion 2111b, the projection area of the mass block third portion 2113b and the projection area of the first direction inner magnetic steel 23b along the first direction X are consistent in size. The mass block 21b can provide greater weight for the vibrator 2b while playing a role in fixing the driving magnetic steel 22b, the hollowed-out portion reduces the amount of material used, and the segmented structure realizes functional zoning, avoids material waste and reduces overall cost.

[0081] The metal sheet 4b is fixedly connected with the mass block first portion 2111b, the mass block third portion 2113b and the first direction inner magnetic steel 23b, and the metal sheet 4b is wrapped around the first direction inner magnetic steel 23b, the mass block first portion 2111b and the mass block third portion close to the front shell 13b, the rear shell 14b, the upper shell 15b and the lower shell 16b. The metal sheet 4b is fixedly connected with the mass block and the magnetic steel, which can prevent displacement or loosening of the components during vibration and improve the mechanical stability of the system.

[0082] The first direction outer magnetic steel 32b, the first direction inner magnetic steel 23b, the second direction magnetic steel 33b and the third direction magnetic steel 34b generate stable repulsive force to ensure the stability of the relative position between the vibrator 2b arranged in the shell 1b and the shell 1b, realize complete non-contact vibration and remove the spring of the traditional motor. The increase of the number of driving coils 31b to two makes the induced electromotive force stronger when the driving coils 31b pass through alternating current, which further enhances the vibration feeling of the motor.

[0083] Please refer to Figures 12-14 , the arrows on the magnetic steel in the figure represent the direction of the magnetic pole, and the direction of the arrow is the N pole, and in other optional embodiments, all the magnetic pole directions can be set to the opposite direction. In the fourth embodiment of the present application, the main difference from the first embodiment is that the driving coil 31c includes an upper driving coil 3131 and a lower driving coil 3132 placed along the first direction X and fixed to the upper shell 15c and the lower shell 16c respectively. The upper and lower driving coils 31c can cooperatively drive the driving magnetic steel 22c to reciprocate along the first direction X, thereby improving the vibration intensity and response speed.

[0084] The driving magnetic steel 22c includes six magnetic steels, which are divided into an upper driving magnetic steel 221 and a lower driving magnetic steel 222 along the third direction Z, the upper driving magnetic steel 221 and the lower driving magnetic steel 222 each include three magnetic steels arranged in sequence along the first direction X, and the magnetization directions of the three magnetic steels of the upper driving magnetic steel 221 are sequentially rotated clockwise by 90 degrees or sequentially rotated counterclockwise by 90 degrees along the second direction Y, the first magnetic steel is closest to the left shell 11c along the first direction X, the magnetization direction of the second magnetic steel is counterclockwise rotated by 90 degrees from the magnetization direction of the first magnetic steel (magnetized along the first direction X), and the magnetization direction of the third magnetic steel is counterclockwise rotated by 90 degrees from the magnetization direction of the second magnetic steel (magnetized along the third direction Z), and the direction is opposite to that of the first magnetic steel, and the magnetization directions of the three magnetic steels of the lower driving magnetic steel 222 are sequentially rotated counterclockwise by 90 degrees or sequentially rotated clockwise by 90 degrees along the second direction Y, the fourth magnetic steel is closest to the left shell 11c along the first direction X, the magnetization direction of the fifth magnetic steel is clockwise rotated by 90 degrees from the magnetization direction of the fourth magnetic steel (magnetized along the first direction X), and the magnetization direction of the sixth magnetic steel is clockwise rotated by 90 degrees from the magnetization direction of the fifth magnetic steel (magnetized along the third direction Z), and the direction is the same as that of the third magnetic steel. The upper and lower driving magnetic steels 22c can make the upper and lower symmetrical driving coils 31c obtain a more uniform magnetic field, greatly improve the utilization rate of the magnetic field, and realize the significant enhancement of the induced electromotive force and the significant improvement of the motor vibration through the optimization of the magnetic flux path, the enhancement of the magnetic flux change rate and the improvement of the energy utilization rate.

[0085] The mass block 21c includes a mass block first part 2111c, a mass block second part 2112c and a mass block third part 2113c in sequence along the first direction X, the mass block first part 2111c and the mass block third part 2113c are connected with the first direction inner magnetic steel 23c along the first direction X, the mass block second part 2112c is partially hollowed out close to the upper shell 15c and the lower shell 16c, and the middle connecting part separates the upper driving magnetic steel 221 and the lower driving magnetic steel 222. The projection area of the mass block first part 2111c, the projection area of the mass block third part 2113c and the projection area of the first direction inner magnetic steel 23c along the first direction X are consistent in size. The mass block 21c can provide a larger weight for the vibrator 2c, and can also fix the driving magnetic steel 22c, the hollowed-out part reduces the amount of material used, and the segmented structure realizes functional partitioning, avoids material waste, and reduces the overall cost.

[0086] The metal sheet 4c is fixedly connected with the mass first part 2111c, the mass third part 2113c and the first direction inner magnetic steel 23c, and is wrapped around the first direction inner magnetic steel 23c, the mass first part 2111c and the mass third part close to the front shell 13c, the rear shell 14c, the upper shell 15c and the lower shell 16c. The metal sheet 4c can prevent displacement or loosening of components during vibration by being fixedly connected with the mass and the magnetic steel, improve the mechanical stability of the system, and can also play a damping effect to help the vibrator 2c to quickly change from a moving state to a stopped state.

[0087] The first direction outer magnetic steel 32c, the first direction inner magnetic steel 23c, the second direction magnetic steel 33c and the third direction magnetic steel 34c generate stable repulsive force to ensure the stability of the relative position between the vibrator 2c arranged in the shell 1c and the shell 1c, realize complete non-contact vibration, and remove the spring of the traditional motor. The upper and lower symmetrical drive coil 31c and the upper and lower two parts of the drive magnetic steel 22c are designed to optimize the magnetic flux path, enhance the magnetic flux change rate, superimpose the electromagnetic force and improve the energy utilization rate, realize the significant enhancement of the induced electromotive force and the significant improvement of the motor vibration.

[0088] Please also refer to Figures 15-17, the arrow points to the N pole, and in other alternative embodiments, all the magnetic pole directions can be set to the opposite direction. The main difference between the fifth embodiment of the application and the first embodiment is that the second direction magnetic steel 33d is three sections of magnetization. In this embodiment, the second direction magnetic steel 33d is three pieces of magnetization after splicing, and in other alternative embodiments, it can be a whole piece of magnetic steel magnetized in different regions and sections. The second direction magnetic steel 33d includes a second direction first magnetic steel 331, a second direction second magnetic steel 332, and a second direction third magnetic steel 333 arranged in the third direction Z. Looking in the first direction X, the magnetization directions of the second direction first magnetic steel 331, the second direction second magnetic steel 332, and the second direction third magnetic steel 333 rotate 90 degrees clockwise or 90 degrees counterclockwise in turn. The second direction first magnetic steel 331 is magnetized in the third direction Z, the magnetization direction of the second direction second magnetic steel 332 rotates 90 degrees counterclockwise (magnetized in the second direction Y) from the magnetization direction of the second direction first magnetic steel 331, and the magnetization direction of the second direction third magnetic steel 333 rotates 90 degrees counterclockwise (magnetized in the third direction Z) from the magnetization direction of the second direction second magnetic steel 332, i.e. the magnetization direction of the second direction third magnetic steel 333 is opposite to that of the second direction first magnetic steel 331. The other side of the second direction magnetic steel 33d rotates in the opposite direction, i.e. clockwise. The second direction first magnetic steel 331 and the second direction third magnetic steel 333 have a strengthening effect on the second direction second magnetic steel 332, which will make the magnetic force lines of the second direction second magnetic steel 332 more concentrated in the second direction Y, and will make the magnetic induction lines more concentrated, thereby generating stronger magnetic levitation force. The face of the second direction second magnetic steel 332 away from the rear shell 14d is the same as the face of the first direction outer first magnetic steel 321d and the first direction inner magnetic steel 231d close to the rear shell 14d, and the face of the second direction second magnetic steel 332 away from the front shell 13d is the same as the face of the first direction outer third magnetic steel 323d and the first direction inner third magnetic steel 233d close to the front shell 13d, which generates a suspension force in the second direction Y and makes the vibrator 2d levitate in the second direction Y between the second direction magnetic steel 33d.

[0089] The third direction magnetic steel 34d is three sections of magnetization, in the embodiment, the third direction magnetic steel 34d is three pieces of magnetic steel which are spliced after magnetization, in other alternative embodiments, it can also be a whole piece of magnetic steel which is magnetized in different regions, the third direction magnetic steel 34d includes a third direction first magnetic steel 3411, a third direction second magnetic steel 3412 and a third direction third magnetic steel 3413 which are sequentially arranged along the second direction Y, as viewed along the first direction, the magnetization directions of the third direction first magnetic steel 3411, the third direction second magnetic steel 3412 and the third direction third magnetic steel 3413 are sequentially rotated clockwise by 90 degrees or sequentially rotated counterclockwise by 90 degrees, the third direction first magnetic steel 3411 is magnetized along the second direction Y, the magnetization direction of the third direction second magnetic steel 3412 is rotated clockwise by 90 degrees from the magnetization direction of the third direction first magnetic steel 3411 (magnetized along the third direction Z), the magnetization direction of the third direction third magnetic steel 3413 is rotated clockwise by 90 degrees from the magnetization direction of the third direction second magnetic steel (magnetized along the second direction Y), that is, the magnetization direction of the third direction third magnetic steel 3413 is opposite to the magnetization direction of the third direction first magnetic steel 3411. The rotation direction of the third direction magnetic steel 34d on the other side is counterclockwise. The third direction first magnetic steel 3411 and the third direction third magnetic steel 3413 have a reinforcing effect on the third direction second magnetic steel 3412, which can make the magnetic force lines of the third direction second magnetic steel 3412 more concentrated in the third direction Z, and can make the magnetic induction lines more concentrated, thereby generating a stronger magnetic levitation force. The surface of the third direction second magnetic steel 3412 away from the shell 1d is the same as the surface of the first direction outer first magnetic steel 321d and the first direction outer third magnetic steel 323d close to the surface of the first direction outer second magnetic steel 322d, the surface of the first direction outer second magnetic steel 322d close to the first direction inner magnetic steel 23d, the surface of the first direction inner first magnetic steel 231d and the first direction inner third magnetic steel 233d close to the surface of the first direction inner second magnetic steel 232d, and the surface of the first direction inner second magnetic steel 232d close to the first direction outer magnetic steel 32d, generating a levitation force along the first direction X and the third direction Z and making the vibrator 2d levitate in the first direction X and the third direction Z between the first direction outer magnetic steel 32d and the third direction magnetic steel 34d.

[0090] The first direction outer magnetic steel 32d, the first direction inner magnetic steel 23d, the second direction magnetic steel 33d and the third direction magnetic steel 34d generate stable repulsive force to ensure the stability of the relative position between the vibrator 2d arranged on the shell 1d and the shell 1d, realize complete non-contact vibration and remove the spring of the traditional motor. In addition, the second direction magnetic steel 33d and the third direction magnetic steel 34d are three sections of magnetization, compared with the first embodiment, they can generate a stronger magnetic levitation force, for example, the third direction first magnetic steel 3411 and the third direction third magnetic steel 3413 have a reinforcing effect on the third direction second magnetic steel 3412, which can make the magnetic force lines of the third direction second magnetic steel 3412 more concentrated in the third direction Z, thereby generating a stronger magnetic levitation force.

[0091] Please refer to Figures 18-20 , the arrow on the magnetic steel indicates the direction of the magnetic pole, and the direction of the arrow is the N pole. In other optional embodiments, all the magnetic pole directions can be set in the opposite direction. In the sixth embodiment of the present application, the main difference from the first embodiment is that the first direction inner magnetic steel 23e and the first direction outer magnetic steel 32e are respectively magnetized along the second direction Y, the two ends of the second direction Y are the same, the face of the first direction inner magnetic steel 23e and the first direction outer magnetic steel 32e close to the second direction magnetic steel 33e is the same as the face of the second direction magnetic steel 33e away from the shell 1e. The magnetic pole generates a suspension force along the first direction X and the second direction Y, and makes the vibrator 2e suspended between the first direction outer magnetic steel 32e and the second direction magnetic steel 34e in the first direction X and the second direction Y. The first direction inner magnetic steel 23e and the first direction outer magnetic steel 32e use a single magnetic steel structure, which can realize simpler assembly compared with other three magnetic steel structures.

[0092] The second direction magnetic steel 33e is single direction magnetized along the second direction Y, the face of the second direction magnetic steel 33e away from the rear shell 14e is the same as the face of the first direction outer magnetic steel 32e and the first direction inner magnetic steel 23e close to the rear shell 14e, the face of the second direction magnetic steel 33e away from the front shell 13e is the same as the face of the first direction outer magnetic steel 32e and the first direction inner magnetic steel 23e close to the front shell 13e. The magnetic pole generates a suspension force along the second direction Y, and makes the vibrator 2e suspended between the second direction magnetic steel 33e in the second direction Y. The single direction magnetization process has lower requirements for equipment precision and operation, does not need complex multi-direction magnetization device, can directly complete magnetization through single direction magnetic field application, and significantly reduces production difficulty and cost.

[0093] The third direction magnetic steel 34e is single direction magnetized along the third direction Z, the face of the third direction magnetic steel 34e close to the shell 1e is the same as the face of the first direction outer magnetic steel 32e and the first direction inner magnetic steel 23e close to the second direction magnetic steel 33e. The magnetic pole generates a suspension force along the second direction Y and the third direction Z, and makes the vibrator 2e suspended between the second direction magnetic steel 33e and the third direction magnetic steel 34e in the first direction X and the third direction Z. The single direction magnetization process has lower requirements for equipment precision and operation, does not need complex multi-direction magnetization device, can directly complete magnetization through single direction magnetic field application, and significantly reduces production difficulty and cost.

[0094] The first direction outer magnetic steel 32e and the first direction inner magnetic steel 23e adopt a single magnetic steel structure, wherein the first direction outer magnetic steel 32e and the first direction inner magnetic steel 23e are opposite top magnetized magnetic steels, the vibrator 2e is suspended in the accommodation space 17e formed by the shell 1e, the first direction outer magnetic steel 32e, the first direction inner magnetic steel 23e, the second direction magnetic steel 33e and the third direction magnetic steel 34e generate stable repulsive force to ensure the stability of the relative position between the vibrator 2e arranged in the shell 1e and the shell 1e, realize complete non-contact vibration, and remove the spring of the traditional motor. Compared with the three magnetic steel structure of the first embodiment, the assembly of the sixth embodiment can be simpler, the magnetic field alignment is more accurate, the process is simplified, and the performance improvement and cost control are considered.

[0095] Please refer to Figures 21-23 , the arrows on the magnetic steels in the figure represent the magnetic pole directions, the direction of the arrow is the N pole, and in other optional embodiments, all the magnetic pole directions can be set to be opposite directions. In the seventh embodiment of the application, the main difference from the sixth embodiment is that the first direction outer magnetic steel 32f is single direction magnetized, the first direction inner magnetic steel 23f is opposite top magnetized along the second direction Y, the face of the first direction outer magnetic steel 32f pointing to the left shell 11f, the faces of the first direction inner magnetic steel 23f along the second direction Y pointing to the front shell 13f and the rear shell 14f respectively, and the face of the second direction magnetic steel 33f away from the shell 1f have the same magnetic pole, generating suspension force along the first direction X and the second direction Y and making the vibrator 2f suspended between the first direction outer magnetic steel 32f and the second direction magnetic steel 33f in the first direction X and the second direction Y.

[0096] The first direction outer magnetic steel 32f and the first direction inner magnetic steel 23f adopt a single magnetic steel structure, wherein the first direction inner magnetic steel 23f is opposite top magnetized magnetic steel, the vibrator 2f is suspended in the accommodation space 17f formed by the shell 1f, the first direction outer magnetic steel 32f, the first direction inner magnetic steel 23f, the second direction magnetic steel 33f and the third direction magnetic steel 34f generate stable repulsive force to ensure the stability of the relative position between the vibrator 2f arranged in the shell 1f and the shell 1f, realize complete non-contact vibration, and remove the spring of the traditional motor. Compared with the three magnetic steel structure of the first embodiment, the assembly of the seventh embodiment can be simpler, only the first direction inner magnetic steel 23f is opposite top magnetized, the process can be simplified, and the manufacturing cost is reduced.

[0097] Please refer to Figures 24-26, the arrow on the magnetic steel indicates the direction of the magnetic pole, and the direction of the arrow is the N pole. In other optional embodiments, all the magnetic pole directions can be set in the opposite direction. The main difference between the eighth embodiment of the application and the first embodiment is that the second direction magnetic steel 33g is magnetized in the second direction Y, and the face of the second direction magnetic steel 33g away from the rear shell 14g is the same as the magnetic pole of the first direction outer magnetic steel 32g and the first direction inner magnetic steel 23g close to the rear shell 14g, and the face of the second direction magnetic steel 33g away from the front shell 13g is the same as the magnetic pole of the first direction outer magnetic steel 32g and the first direction inner magnetic steel 23g close to the front shell 13g, generating a suspension force in the second direction Y and making the vibrator 2g suspended between the second direction magnetic steel 33g in the second direction Y.

[0098] The third direction magnetic steel 34g includes the first Z direction magnetic steel 3421 and the second Z direction magnetic steel 3422 fixed to the upper shell 15g and close to the left shell 11g, the third Z direction magnetic steel 3423 and the fourth Z direction magnetic steel 3424 fixed to the upper shell 15g and close to the right shell 12g, the fifth Z direction magnetic steel 3425 and the sixth Z direction magnetic steel 3426 fixed to the lower shell 16g and close to the left shell 11g, the seventh Z direction magnetic steel 3427 and the eighth Z direction magnetic steel 3428 fixed to the lower shell 16g and close to the right shell 12g, and magnetized in the third direction Z. The face of the third direction magnetic steel 34g away from the shell 1g is the same as the magnetic pole of the first direction outer first magnetic steel 321g and the first direction outer third magnetic steel 323g close to the second direction magnetic steel 33g, the first direction inner first magnetic steel 231g and the first direction inner third magnetic steel 233g close to the second direction magnetic steel 33g, and the second direction magnetic steel 33g away from the shell 1g, generating a suspension force in the second direction Y and the third direction Z and making the vibrator 2g suspended between the second direction magnetic steel 33g and the third direction magnetic steel 34g in the second direction Y and the third direction Z. The third direction magnetic steel 34g is placed on both sides, and the eight Z direction magnetic steels can increase the stability and prevent the vibrator 2g from rotating during vibration.

[0099] The driving coil 31g includes the first driving coil 3121g and the second driving coil 3122g arranged side by side in the first direction X fixed to the lower shell 16g, and the third driving coil 3123 and the fourth driving coil 3124 arranged side by side in the first direction X fixed to the upper shell 15g. The design of the four driving coils 31g symmetrically arranged up and down can increase the utilization rate of electromagnetic force and improve the inductive electromotive force and the motor vibration.

[0100] The driving magnetic steel 22g includes three magnetic steels arranged in sequence along the first direction X, which are multi-pole magnetic steels integrally formed, and the magnetization directions of the three magnetic steels are rotated by 180 degrees in sequence along the third direction Z. The magnetization directions of the first and third magnetic steels are the same, and the magnetization direction of the second magnetic steel is opposite to those of the first and third magnetic steels. The driving magnetic steel 22g interacts with the driving coil 31g to generate electromagnetic force to drive the vibrator 2g to vibrate. The driving magnetic steel 22g adopts a multi-pole magnetization mode, has a symmetrical magnetic field distribution characteristic, and the magnetic field strengths on both sides thereof are mirror-symmetric. Based on this characteristic, coils can be arranged on both sides of the magnetic steel, and two driving coils are arranged in an upper and lower double-layer structure, respectively. This symmetrical layout can effectively improve the driving efficiency, make the force acting on the vibrator 2g more uniform, reduce mechanical stress, and improve long-term operation stability.

[0101] The mass block 21g includes, in sequence along the first direction X, a mass block first portion 2111g, a mass block second portion 2112g, and a mass block third portion 2113g. The mass block first portion 2111g and the mass block third portion 2113g are connected to the first direction inner magnetic steel 23g along the first direction X. The mass block second portion 2112g has a through hole formed thereon, and the driving magnetic steel 22g is arranged in the through hole. The mass block 21g can provide a greater weight for the vibrator 2g while fixing the driving magnetic steel 22g. The hollow portion reduces the amount of material used, and the segmented structure achieves functional partitioning, avoids material waste, and reduces overall cost.

[0102] The metal sheet 4g includes a vibrator portion metal sheet 41g and a stator portion metal sheet 42g. The vibrator portion metal sheet 41g is fixedly connected to the mass block first portion 2111g, the mass block third portion 2113g, and the first direction inner magnetic steel 23g, and is wrapped around the surfaces of the mass block first portion 2111g, the mass block third portion 2113g, and the first direction inner magnetic steel 23g close to the front shell 13g, the rear shell 14g, the upper shell 15g, and the lower shell 16g. The stator portion metal sheet 42g includes a first metal sheet 421g, a second metal sheet 422g, a third metal sheet 423g, and a fourth metal sheet 424g. The first metal sheet 421g is located between the first Z-direction magnetic steel 3421 and the second Z-direction magnetic steel 3422 and is fixed to the upper shell 15g. The second metal sheet 422g is located between the third Z-direction magnetic steel 3423 and the fourth Z-direction magnetic steel 3424 and is fixed to the upper shell 15g. The third metal sheet 423g is located between the fifth Z-direction magnetic steel 3425 and the sixth Z-direction magnetic steel 3426 and is fixed to the lower shell 16g. The fourth metal sheet 424g is located between the seventh Z-direction magnetic steel 3427 and the eighth Z-direction magnetic steel 3428 and is fixed to the lower shell 16g. The metal sheet 4g is arranged between the third direction magnetic steels 34g and can provide stronger damping effect.

[0103] The first direction outer magnetic steel 32g, the first direction inner magnetic steel 23g, the second direction magnetic steel 33g and the third direction magnetic steel 34g generate stable repulsive force to ensure the stability of the relative position between the vibrator 2g arranged in the shell 1g and the shell 1g, realize complete non-contact vibration and remove the spring of the traditional motor. The design of the four driving coils 31g arranged symmetrically upwards and downwards realizes the significant enhancement of induced electromotive force and the significant improvement of motor vibration by superimposing electromagnetic force and improving energy utilization. In addition, the third direction magnetic steel 34g is arranged on both sides, which can increase the stability and prevent the rotation of the vibrator 2g during vibration. The metal sheet 4g arranged between the third direction magnetic steels 34g can provide stronger damping effect.

[0104] Compared with the related art, the linear vibration motor provided by the application comprises a shell, a stator, a vibrator and magnetic steels suspending the vibrator in the shell, the vibrator comprises a mass, a driving magnetic steel fixedly connected with the mass and a first direction inner magnetic steel fixed to the mass and arranged on both sides close to the left shell and the right shell; the stator comprises a driving coil fixed to the shell, a first direction outer magnetic steel fixed to the left shell and the right shell, a second direction magnetic steel fixed to the front shell and the rear shell and a third direction magnetic steel fixed to the upper shell and the lower shell, the driving coil drives the vibrator to vibrate along the first direction when electrified, the first direction outer magnetic steel has the same opposite surface magnetic pole as the first direction inner magnetic steel, the second direction magnetic steel has the same opposite surface magnetic pole as the first direction outer magnetic steel and the first direction inner magnetic steel, and the third direction magnetic steel generates a third direction suspension force with the first direction outer magnetic steel and the first direction inner magnetic steel, so that the vibrator is suspended between the third direction magnetic steels in the third direction. The vibrator can be suspended in the accommodation space formed by the shell, and since the repulsive force is larger when the magnetic steels with the same poles are closer, the vibrator is effectively prevented from colliding with the first direction outer magnetic steel. The first direction outer magnetic steel, the first direction inner magnetic steel, the second direction magnetic steel and the third direction magnetic steel generate stable repulsive force to ensure the stability of the relative position between the vibrator arranged in the shell and the shell, realize complete non-contact vibration and remove the spring of the traditional motor.

[0105] The above is only an embodiment of the application, and it should be pointed out here that those skilled in the art can make improvements without departing from the inventive concept, and these improvements are within the protection scope of the application.

Claims

1. A linear vibration motor, comprising: The housing includes a left and right shell arranged opposite each other along a first direction, a front and rear shell arranged opposite each other along a second direction, and an upper and lower shell arranged opposite each other along a third direction. The front, rear, left, right, upper, and lower shells enclose a receiving space. The linear vibration motor further includes an oscillator and a stator housed within the receiving space. The oscillator comprises a mass block, a driving magnet fixedly connected to the mass block, and inner magnets fixed along the first direction on both sides of the mass block near the left and right shells. The stator comprises a driving coil fixed to the housing, outer magnets fixed along the first direction on the left and right shells, and inner magnets fixed along the first direction on both sides of the mass block near the left and right shells. A second directional magnet fixed to the front shell and the rear shell, and a third directional magnet respectively fixed to the upper shell and the lower shell, drive the oscillator to vibrate along the first direction when the drive coil is energized. The magnetic poles of the opposite surfaces of the first directional outer magnet and the first directional inner magnet are the same. The magnetic poles of the opposite surfaces of the second directional magnet, the first directional outer magnet, and the first directional inner magnet are the same. The magnetic poles of the third directional magnet near the shell and the first directional inner magnet near the second directional magnet are the same. The third directional magnet, the first directional outer magnet, and the first directional inner magnet generate a levitation force along the third directional direction that causes the oscillator to suspend between the third directional magnets in the third directional direction.

2. The linear vibration motor according to claim 1, characterized in that: The first direction outer magnet includes a first direction outer first magnet, a first direction outer second magnet, and a first direction outer third magnet arranged sequentially along the second direction. Viewed along the third direction, the magnetization direction of the first direction outer first magnet, the first direction outer second magnet, and the first direction outer third magnet rotates 90 degrees counterclockwise or 90 degrees clockwise in sequence. The first direction inner magnet includes a first direction inner first magnet, a first direction inner second magnet, and a first direction inner third magnet arranged sequentially along the second direction. Viewed along the third direction, the magnetization direction of the first direction inner first magnet, the first direction inner second magnet, and the first direction inner third magnet rotates 90 degrees clockwise or 90 degrees counterclockwise in sequence.

3. The linear vibration motor according to claim 2, characterized in that: The second magnet outside the first direction and the second magnet inside the first direction repel each other along the first direction with the same pole.

4. The linear vibration motor according to claim 1, characterized in that: The outer magnet in the first direction and the inner magnet in the first direction are respectively magnetized at opposite ends along the second direction, and the magnetic poles at both ends along the second direction are the same.

5. The linear vibration motor according to claim 1, characterized in that: The first direction outer magnet is magnetized in one direction, the first direction inner magnet is magnetized in the second direction, the first direction outer magnet is fixed to the surface of the left shell, the first direction inner magnet along the second direction is close to the front shell and the rear shell respectively, and the magnetic poles of the second direction magnet away from the shell are the same.

6. The linear vibration motor according to claim 1, characterized in that: The second directional magnet is magnetized in one direction along the second direction. The surface of the second directional magnet away from the rear shell has the same magnetic pole as the surfaces of the first directional outer magnet and the first directional inner magnet near the rear shell, and the surface of the second directional magnet away from the front shell has the same magnetic pole as the surfaces of the first directional outer magnet and the first directional inner magnet near the front shell.

7. The linear vibration motor according to claim 2, characterized in that: The second directional magnet includes a second directional first magnet, a second directional second magnet, and a second directional third magnet arranged sequentially along the third direction. Viewed along the first direction, the magnetization directions of the second directional first magnet, the second directional second magnet, and the second directional third magnet are rotated 90 degrees clockwise or 90 degrees counterclockwise in sequence. The surface of the second directional second magnet away from the rear shell has the same magnetic poles as the surfaces of the first directional outer first magnet and the first directional inner first magnet near the rear shell, and the surface of the second directional second magnet away from the front shell has the same magnetic poles as the surfaces of the first directional outer third magnet and the first directional inner third magnet near the front shell.

8. The linear vibration motor according to claim 1, characterized in that: The third-direction magnet is magnetized in one direction along the third direction. The magnetic poles of the third-direction magnet away from the shell are the same as the magnetic poles of the first magnet outside the first direction and the third magnet outside the first direction near the second magnet outside the first direction, the magnetic poles of the second magnet outside the first direction near the magnetic pole inside the first direction, the magnetic poles of the first magnet inside the first direction and the third magnet inside the first direction near the second magnet inside the first direction, and the magnetic poles of the second magnet inside the first direction near the magnetic pole outside the first direction.

9. The linear vibration motor according to claim 1, characterized in that: The third-direction magnet includes a third-direction first magnet, a third-direction second magnet, and a third-direction third magnet arranged sequentially along the second direction. Viewed along the first direction, the magnetization directions of the third-direction first magnet, the third-direction second magnet, and the third-direction third magnet are rotated 90 degrees clockwise or 90 degrees counterclockwise in sequence. The surface of the third-direction second magnet away from the shell has the same magnetic pole as the surfaces of the first magnet outside the first direction and the third magnet outside the first direction near the second magnet outside the first direction, the surface of the second magnet outside the first direction near the magnet inside the first direction, the surface of the first magnet inside the first direction and the third magnet inside the first direction near the second magnet inside the first direction, and the surface of the second magnet inside the first direction near the magnet outside the first direction.

10. The linear vibration motor according to claim 1, characterized in that: The third-direction magnet is magnetized in one direction along the third direction, and the surface of the third-direction magnet near the shell has the same magnetic pole as the surface of the first-direction outer magnet and the first-direction inner magnet near the second-direction magnet.

11. The linear vibration motor according to claim 1, characterized in that: The third-direction magnet includes a first Z-axis magnet and a second Z-axis magnet fixed at intervals to each other near the left shell of the upper shell; a third Z-axis magnet and a fourth Z-axis magnet fixed to the right shell of the upper shell; a fifth Z-axis magnet and a sixth Z-axis magnet fixed to the left shell of the lower shell; and a seventh Z-axis magnet and an eighth Z-axis magnet fixed to the right shell of the lower shell. The magnets are unidirectionally magnetized along the third direction. The magnetic poles of the third-direction magnets are the same as the magnetic poles of the first magnet outside the first direction and the third magnet outside the first direction near the second-direction magnet, the magnetic poles of the first magnet inside the first direction and the magnetic poles of the third magnet inside the first direction near the second-direction magnet, and the magnetic poles of the second-direction magnets away from the shell.

12. The linear vibration motor according to claim 1, characterized in that: The drive coil is laid flat and fixed to the lower shell.

13. The linear vibration motor according to claim 1, characterized in that: The drive coil includes a first side, a second side, a third side, and a fourth side connected in sequence, which are fixed to the front shell, the upper shell, the rear shell, and the lower shell, respectively.

14. The linear vibration motor according to claim 1, characterized in that: The drive coil includes a first drive coil and a second drive coil that are fixed side-by-side to the lower shell along the first direction.

15. The linear vibration motor according to claim 1, characterized in that: The drive coil includes an upper drive coil and a lower drive coil, which are placed along the first direction and fixed to the upper shell and the lower shell, respectively.

16. The linear vibration motor according to claim 13, characterized in that: The drive coil includes a first drive coil and a second drive coil fixed to the lower shell and arranged in parallel along the first direction, and a third drive coil and a fourth drive coil fixed to the upper shell and arranged in parallel along the first direction.

17. The linear vibration motor according to claim 1, characterized in that: The driving magnet includes three magnets arranged sequentially along the first direction. When viewed along the second direction, the magnetization direction of the three magnets is rotated 90 degrees clockwise or 90 degrees counterclockwise in sequence.

18. The linear vibration motor according to claim 1, characterized in that: The driving magnet is magnetized at its top along the first direction, and the two end faces of the driving magnet along the first direction have the same magnetic poles.

19. The linear vibration motor according to claim 1, characterized in that: The driving magnet includes five magnets arranged sequentially along the first direction. When viewed along the second direction, the magnetization direction of the five magnets is rotated 90 degrees clockwise or 90 degrees counterclockwise in sequence.

20. The linear vibration motor according to claim 1, characterized in that: The driving magnet comprises six magnets, which are divided into an upper driving magnet and a lower driving magnet along the third direction. The upper driving magnet and the lower driving magnet each comprise three magnets arranged sequentially along the first direction. Viewed along the second direction, the magnetization direction of the three magnets of the upper driving magnet rotates 90 degrees clockwise or 90 degrees counterclockwise in sequence. Viewed along the second direction, the magnetization direction of the three magnets of the lower driving magnet rotates 90 degrees counterclockwise or 90 degrees clockwise in sequence.

21. The linear vibration motor according to claim 1, characterized in that: The driving magnet includes three magnets arranged sequentially along the first direction. The three magnets are integrally formed multipole magnets. When viewed along the third direction, the magnetization direction of the three magnets is rotated 180 degrees sequentially.

22. The linear vibration motor according to claim 1, characterized in that: The mass block sequentially comprises a first part, a second part, and a third part along the first direction. The first part and the third part are connected to magnets along the first direction. The linear vibration motor includes a metal sheet, which includes an oscillator metal sheet and a stator metal sheet. The oscillator metal sheet is fixedly connected to the first part, the third part, and magnets along the first direction. The stator metal sheet is fixed to the lower shell and spaced apart on both sides of the drive coil along the first direction.

23. The linear vibration motor according to claim 1, characterized in that: The linear vibration motor includes metal plates, which include a first metal plate, a second metal plate, a third metal plate, and a fourth metal plate. The first metal plate and the second metal plate are fixed to the upper shell and located on both sides of the drive coil, while the third metal plate and the fourth metal plate are fixed to the lower shell and located on both sides of the drive coil.

24. The linear vibration motor according to claim 1, characterized in that: The mass block includes a first part, a second part, and a third part in sequence along the first direction. The first part and the third part are connected to magnets along the first direction. The linear vibration motor includes a metal sheet, which is fixedly connected to the first part, the third part, and the magnets in the first direction.

25. The linear vibration motor according to claim 10, characterized in that: The mass block sequentially comprises a first part, a second part, and a third part along the first direction. The first part and the third part are connected to magnets along the first direction. The linear vibration motor includes metal plates, which include an oscillator metal plate and a stator metal plate. The oscillator metal plate is fixedly connected to the first part, the third part, and the magnets along the first direction. The stator metal plate includes a first metal plate, a second metal plate, a third metal plate, and a fourth metal plate. The first metal plate is located between the first Z-axis magnet and the second Z-axis magnet and is fixed to the upper shell. The second metal plate is located between the third Z-axis magnet and the fourth Z-axis magnet and is fixed to the upper shell. The third metal plate is located between the fifth Z-axis magnet and the sixth Z-axis magnet and is fixed to the lower shell. The fourth metal plate is located between the seventh Z-axis magnet and the eighth Z-axis magnet and is fixed to the lower shell.

26. The linear vibration motor according to any one of claims 21-24, characterized in that: The metal sheet is a copper sheet.

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