CN220475584U - Linear vibration assembly and vibration motor - Google Patents

Abstract

The utility model provides a linear vibration assembly and a vibration motor, comprising two stator cores, a frame-type vibrator and a vibrator core; the two stator iron cores are fixedly connected in the motor shell and symmetrically distributed, and a plurality of magnetic conduction parts are distributed on the stator iron cores at intervals; two ends of the frame-type vibrator are respectively connected with the motor shell through elastic elements; the vibrator iron core is positioned on the symmetry axis of the two stator iron cores, permanent magnets are arranged on two sides of the vibrator iron core, a plurality of pairs of magnetic poles are distributed on the permanent magnets, and the juncture positions of two adjacent pairs of magnetic poles are aligned with one of the magnetic conduction parts; the electromagnetic coils are wound on at least one magnetic conduction part positioned in the middle of the stator core, and alternating current is introduced into the electromagnetic coils so that the extending ends of the magnetic conduction parts can obtain alternating magnetic polarities. The linear vibration component and the vibration motor provided by the utility model can save cost and improve the power performance of the vibration motor.

Description

Linear vibration assembly and vibration motor

Technical Field

The utility model belongs to the technical field of vibration motors, and particularly relates to a linear vibration assembly and a vibration motor.

Background

The vibration motor comprises a rotary vibration motor and a linear vibration motor, wherein the linear vibration motor has the advantages of quick vibration response, good vibration texture, strong vibration digital control performance and the like, and is now the first choice of the mainstream vibration solution, and is widely applied to electronic products such as mobile phones, intelligent wearing, game machines, VR equipment, unmanned aerial vehicles and the like. The existence of the iron core can generate component force crossing the vibration direction, so that the linear relation between the restoring force and displacement of the vibrator is influenced, and the normal vibration output of the vibration motor is influenced, so that the conventional vibration motor mostly adopts a coreless design scheme.

However, since the vibrating motor without iron core design is completely dependent on the magnetic field generated by the electromagnetic coil, on one hand, the magnetic force lines of the electromagnetic coil are distributed and dispersed, so that the effective convergence cannot be performed on the target position, and on the other hand, the reciprocating vibration of the vibrating motor is dependent on the coupling acting force between the electromagnetic coil and the magnet, and in fact, the coupling acting force only uses the magnetic polarity of the electromagnetic coil towards one end of the magnet, but the magnetic polarity of the other end cannot form acting force with the magnet, so that the magnetic field utilization rate of the electromagnetic coil is very low based on the two factors, and the principle that the dynamic performance of the vibrating motor is poor is also caused.

At present, the power of the vibration motor is usually improved by adding an electromagnetic coil, but the copper consumption is increased in multiple times by the mode, so that the product cost is increased, and the market competitiveness of the product is affected.

Disclosure of Invention

The embodiment of the utility model provides a linear vibration assembly and a vibration motor, which aim to save cost and improve the power performance of the vibration motor.

In order to achieve the above purpose, the utility model adopts the following technical scheme: in a first aspect, there is provided a linear vibration assembly comprising:

the two stator iron cores are fixedly connected in the motor shell and symmetrically distributed, m magnetic conduction parts are distributed on the stator iron cores at intervals along the X direction, and each magnetic conduction part extends towards the middle part of the motor shell; wherein m is a positive integer, and m is more than or equal to 3;

the frame-type vibrator is sleeved on the periphery of the two stator iron cores, and two X-direction ends are respectively connected with the motor shell through a group of elastic elements;

the vibrator iron core is fixedly connected in the frame-type vibrator along the X direction and is positioned on the symmetrical axis of the two stator iron cores, a group of permanent magnets are respectively arranged on two sides of the Y direction of the vibrator iron core, the two groups of permanent magnets jointly form m+1 pairs of magnetic poles which are distributed in sequence along the X direction, and the juncture positions of two adjacent pairs of magnetic poles are aligned with one magnetic conduction part along the Y direction;

wherein, the electromagnetic coil is wound on at least one magnetic conduction part located between the first magnetic conduction part and the m magnetic conduction part of the stator core along the X direction, and the electromagnetic coil is used for introducing alternating current so that the extending ends of all the magnetic conduction parts can obtain alternating magnetic polarities; two sets of magnetic coupling forces are formed between the two stator cores and the two sets of permanent magnets respectively, the two sets of magnetic coupling forces are equal in size and consistent in direction along the X direction, and the two sets of magnetic coupling forces are equal in size and opposite in direction along the Y direction.

Illustratively, the second to m-1 th magnetic conductive parts of the stator core along the X direction are wound with electromagnetic coils; where m=3 or m is an even number.

For example, the m-k magnetic conductive parts of the stator core along the X direction are wound with electromagnetic coils; wherein m and k are both odd numbers, and k is more than or equal to 1 and less than m.

With reference to the first aspect, in one possible implementation manner, winding directions of two electromagnetic coils aligned along the Y-axis direction on the two stator cores are the same.

In some embodiments, grooves suitable for embedding and bonding and fixing the end parts of the vibrator iron cores are arranged on the inner walls of the two X-direction ends of the frame-shaped vibrator; each group of permanent magnets is magnetic steel with m+1 sections of magnetizing areas arranged along the X direction, each section of magnetizing area is magnetized along the Y direction, and the magnetic pole directions of the adjacent magnetizing areas are opposite.

With reference to the first aspect, in one possible implementation manner, a plurality of embedding openings suitable for embedding and adhering and fixing the two groups of permanent magnets are respectively arranged on two sides of the vibrator iron core in the Y direction.

Each group of permanent magnets comprises m+1 first magnets which are sequentially embedded in each embedded opening, wherein the first magnets magnetize along the Y direction, and the magnetic pole directions of the adjacent first magnets are opposite.

For example, each group of permanent magnets comprises (m+1)/2 second magnets which are sequentially embedded in the embedded openings, wherein the second magnets magnetize along the X direction, and the magnetic pole directions of the second magnets are consistent.

In some embodiments, two elastic elements are symmetrically distributed at two ends of the frame-shaped vibrator by taking the vibrator iron core as a center, and the elastic elements are V-shaped or U-shaped spring pieces.

The linear vibration component provided by the utility model has the beneficial effects that: compared with the prior art, the linear vibration component has the advantages that the two stator iron cores are symmetrically distributed on two sides of the vibrator iron core and respectively correspond to the permanent magnets on two sides of the vibrator iron core along the Y direction, as Y-direction coupling forces between the symmetrically distributed two stator iron cores and the two permanent magnets are equal and opposite, the two stator iron cores can offset each other, meanwhile, the X-direction coupling forces of the two stator iron cores to the two permanent magnets are equal and consistent, so that the vibrator iron cores connected with the two permanent magnets can only bear magnetic coupling forces superposed along the X direction, the vibrator iron cores are prevented from bearing Y-direction component force to influence vibration linearity, and the magnetic coupling forces are alternately reversed through alternating current direction of alternating current, so that X-direction reciprocating vibration of a frame-type vibrator connected with the vibrator iron cores is realized under the coaction of the two groups of elastic elements; the magnetic conduction parts wound with the electromagnetic coils converge one magnetic polarity towards the end parts of the permanent magnets through the electromagnetic coils wound on at least one magnetic conduction part positioned in the middle of the stator iron core, the magnetic conduction parts not wound with the electromagnetic coils converge the other magnetic polarity towards the end parts of the permanent magnets, and the two magnetic polarities are respectively matched with corresponding magnetic poles distributed on the permanent magnets in sequence, so that magnetic coupling force can be formed between the magnetic polarities at the two ends of the electromagnetic coils and the permanent magnets, thereby greatly improving the magnetic field utilization rate and the power performance; in addition, the magnetic field is guided and converged by the two stator cores, so that the magnetic field utilization rate is improved, the number of electromagnetic coils can be properly reduced, the copper consumption can be reduced, the cost is reduced, and the market competitiveness of the product is improved.

In a second aspect, an embodiment of the present utility model further provides a vibration motor including the above-described linear vibration assembly.

The vibrating motor provided by the utility model has the beneficial effects that: compared with the prior art, the vibration motor adopts the linear vibration assembly, and the magnetic fields generated by the electromagnetic coils are guided and converged through the symmetrically arranged stator iron cores, so that the power performance can be improved, the number of the electromagnetic coils can be reduced, the cost is reduced, and the market competitiveness of products is improved.

Drawings

FIG. 1 is a schematic diagram showing a structure of a linear vibration assembly and a magnetic pole distribution of an electromagnetic coil when a forward current is applied according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a magnetic pole distribution of the electromagnetic coil of FIG. 1 when reverse current is applied;

FIG. 3 is a schematic view of a linear vibration assembly according to a second embodiment of the present utility model;

FIG. 4 is a schematic view of a linear vibration assembly according to a third embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a vibrator core according to two embodiments of the present utility model.

In the figure: 10. a stator core; 11. a magnetic conduction part; 20. a frame-type vibrator; 21. an elastic element; 30. a vibrator iron core; 31. a permanent magnet; 311. a first magnet; 312. a second magnet; 32. a groove; 33. a notch is formed; 40. an electromagnetic coil.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present utility model. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.

Referring to fig. 1 to 4 together, a description will now be given of a linear vibration assembly according to the present utility model. The linear vibration assembly includes two stator cores 10, a frame-type vibrator 20, and a vibrator core 30.

The two stator iron cores 10 are fixedly connected in the motor shell and symmetrically distributed, m magnetic conduction parts 11 are distributed on the stator iron cores 10 at intervals along the X direction, and each magnetic conduction part 11 extends towards the middle part of the motor shell; wherein m is a positive integer, and m is more than or equal to 3.

The frame-shaped vibrator 20 is sleeved on the periphery of the two stator cores 10, and two X-direction ends are respectively connected with the motor shell through a group of elastic elements 21; the vibrator iron core 30 is fixedly connected in the frame vibrator 20 along the X direction and is positioned on the symmetry axis of the two stator iron cores 10, a group of permanent magnets 31 are respectively arranged on two sides of the vibrator iron core 30 along the Y direction, the two groups of permanent magnets 31 jointly form m+1 pairs of magnetic poles distributed in sequence along the X direction, and the juncture positions of two adjacent pairs of magnetic poles are aligned with one magnetic conduction part 11 along the Y direction.

Wherein, the electromagnetic coil 40 is wound on at least one magnetic conduction part 11 located between the first magnetic conduction part 11 and the m magnetic conduction part 11 of the stator core 10 along the X direction, and the electromagnetic coil 40 is used for supplying alternating current so that the extending ends of the magnetic conduction parts 11 can obtain alternating magnetic polarities; two sets of magnetic coupling forces are correspondingly formed between the two stator cores 10 and the two sets of permanent magnets 31 respectively, the two sets of magnetic coupling forces are equal in size and consistent in direction along the X direction, and the two sets of magnetic coupling forces are equal in size and opposite in direction along the Y direction.

It should be understood that, in this embodiment, in order to ensure that the magnetic coupling forces generated between the two stator cores 10 and the respective corresponding permanent magnets 31 are equal, each stator core 10 should have at least three magnetic conductive portions 11, and the electromagnetic coil 40 is disposed on the middle magnetic conductive portion 11, so that the magnetic coupling forces between the two X-directional ends of the stator core 10 and the permanent magnets 31 can be ensured to be consistent, and the vibration stability can be improved.

In this embodiment, the number of pole pairs on the permanent magnet 31 is one more than the number of the magnetic conductive portions 11 of the stator core 10, so that the end portion of each magnetic conductive portion 11 can be aligned with the boundary position of two adjacent pairs of magnetic poles, and it should be understood that two adjacent pairs of magnetic poles may be in direct contact or have a certain interval, so that two adjacent pairs of magnetic poles can be symmetrically distributed with the corresponding magnetic conductive portion 11 as the center, so as to ensure that the Y-direction magnetic coupling force between two stator cores 10 and the corresponding permanent magnets 31 is always equal and opposite, further avoid the cross interference between the magnetic coupling force between the core and the permanent magnets 31 and the vibration direction, and ensure the vibration output linearity.

Compared with the prior art, the linear vibration assembly provided by the embodiment has the advantages that the two stator cores 10 are symmetrically distributed on two sides of the vibrator core 30 and respectively correspond to the permanent magnets 31 on two sides of the vibrator core 30 along the Y direction, and because the Y-direction coupling forces between the symmetrically distributed two stator cores 10 and the two permanent magnets 31 are equal and opposite, the two stator cores can be mutually offset, and meanwhile, the X-direction coupling forces of the two stator cores 10 to the two permanent magnets 31 are equal and consistent, so that the vibrator core 30 connected with the two permanent magnets 31 can bear only the magnetic coupling force overlapped along the X direction, the vibrator core 30 is prevented from bearing the Y-direction component force to influence the vibration linearity, and the magnetic coupling force is alternately reversed through the alternating current direction change, thereby realizing the X-direction reciprocating vibration of the frame vibrator 20 connected with the vibrator core 30 under the coaction of the two groups of elastic elements 21.

Further, by the electromagnetic coil 40 wound on at least one magnetic conducting part 11 positioned in the middle of the stator core 10, the magnetic conducting part 11 wound with the electromagnetic coil 40 converges with one magnetic polarity towards the end part of the permanent magnet 31, the magnetic conducting part 11 not wound with the electromagnetic coil 40 converges with the other magnetic polarity towards the end part of the permanent magnet 31, and the two magnetic polarities are respectively matched with corresponding magnetic poles distributed on the permanent magnet 31 in sequence, so that magnetic coupling force can be formed between the magnetic polarities at the two ends of the electromagnetic coil 40 and the permanent magnet 31, thereby greatly improving the magnetic field utilization rate and the power performance; in addition, by utilizing the guiding and converging action of the two stator cores 10 on the magnetic field, the magnetic field utilization rate is improved, and the number of the electromagnetic coils 40 can be properly reduced, so that the copper consumption can be reduced, the cost is reduced, and the market competitiveness of the product is improved.

As a specific distribution manner of the electromagnetic coil 40, the electromagnetic coil 40 is wound on the second to m-1 th magnetic conductive portions 11 of the stator core 10 along the X direction; where m=3 or m is an even number.

When m=3 is that the stator core 10 is in an E-type structure, only the middle magnetic conduction part 11 is wound with the electromagnetic coil 40, and when m is an even number greater than 3, as illustrated by m=4 shown in fig. 3, one electromagnetic coil 40 is wound on each of the two middle magnetic conduction parts 11 of the stator core 10, winding directions of the two electromagnetic coils 40 are opposite, a magnetic pole led to be converged on the uppermost magnetic conduction part 11 on the left side is an S pole when passing forward electricity, a magnetic pole led to be converged on the lowermost magnetic conduction part 11 is an N pole, and left and right sides are consistent with alignment areas of the two groups of permanent magnets 31 respectively along the Y direction, so that Y direction forces can be offset, and when currents are reversed, magnetic polarities of end parts of the two magnetic conduction parts 11 are respectively generated with upward magnetic coupling forces (including upward repulsive force and attractive force), and when the currents are reversed, the magnetic coupling forces in the Y direction are reversed, the two groups of permanent magnets 31 are simultaneously started to bear downward magnetic coupling forces, thereby realizing the frame-type output linear vibrator with elastic force of the elastic element 21.

As another specific distribution mode of the electromagnetic coil 40, the electromagnetic coil 40 is wound on the m-k th magnetic conductive parts 11 of the stator core 10 along the X direction; wherein m and k are both odd numbers, and k is more than or equal to 1 and less than m.

Here, it should be noted that m is a fixed value, and k is a variable, and when m=5, the k value includes 1 and 3, that is, the electromagnetic coil 40 is wound on the second and fourth magnetic conductive portions 11 of the stator core 10 from top to bottom, as shown in fig. 4; when the end magnetic pole on the second magnetic conduction portion 11 is S, the N pole thereof is magnetically conducted to the ends of the first and third magnetic conduction portions 11, and the N pole of the fourth magnetic conduction portion 11 is magnetically conducted to the ends of the third and fifth magnetic conduction portions 11, respectively, so that the third magnetic conduction portion 11 is a superposition of the magnetic polarities N on the second and fourth magnetic conduction portions 11, and considering the attenuation factor of the third magnetic conduction portion 11 far from the electromagnetic coil 40, the magnetic polarities after superposition can be close to the effect of winding the electromagnetic coil 40 (this aims to explain the technical principle, the practical effect should be combined with the factors such as the size of the electromagnetic coil 40 and the magnetic conduction path distance between the adjacent magnetic conduction portions 11), and the magnetic polarities on the first and fifth magnetic conduction portions 11 are weaker due to the distance from the electromagnetic coil 40, but can be understood that the superposition of the magnetic coupling force generated between the two magnetic conduction portions and the permanent magnet 31 produces the effect of one electromagnetic coil 40, thereby being understood that the magnetic field coupling force of the four coils 40 is set up under the conventional conditions, and the magnetic field efficiency is improved, and the magnetic field efficiency is lowered.

In the above embodiment, the winding directions of the two electromagnetic coils 40 aligned in the Y-axis direction on the two stator cores 10 are the same. That is, the magnetic polarities of the winding portions of the two stator cores 10 are opposite to each other, and the two groups of permanent magnets 31 are aligned in the Y direction, so that the two groups of permanent magnets 31 are prevented from being mutually exclusive in the Y direction to affect the connection stability, and the two stator cores 10 and the two groups of permanent magnets 31 can always have magnetic coupling forces with equal magnitudes and opposite directions in the Y direction, so that the purpose of counteracting is achieved.

In some possible implementations, referring to the left side view a in fig. 1 and 5, grooves 32 suitable for embedding and adhering and fixing the ends of the vibrator core 30 are formed on the inner walls of the two X-direction ends of the frame vibrator 20; each group of permanent magnets 31 is magnetic steel with m+1 sections of magnetizing areas arranged along the X direction, each section of magnetizing area is magnetized along the Y direction, and the magnetic pole directions of the adjacent magnetizing areas are opposite. The permanent magnet 31 is formed by sectionally magnetizing the magnetic steel with an integrated structure, and meanwhile, the permanent magnet 31 is embedded in the groove 32 to be positioned and bonded and fixed, so that the connection reliability between the permanent magnet 31 and the vibrator iron core 30 is ensured, and the dislocation or falling of the permanent magnet 31 in the vibration process is avoided.

In some embodiments, the vibrator core 30 adopts a structure as shown in a right side view b of fig. 5, and a plurality of insertion openings 33 adapted to be inserted into and adhesively fixed by two sets of permanent magnets 31 are respectively provided on two sides of the vibrator core 30 in the Y direction. The permanent magnets 31 are fixed by arranging the embedded openings 33, and the permanent magnet fixing device is suitable for a plurality of permanent magnets 31 corresponding to each magnetic conduction part 11, so that the total volume of the permanent magnets 31 can be reduced, the consumption of expensive rare earth permanent magnet materials is saved, and the cost is saved.

For example, referring to fig. 3, each set of permanent magnets 31 includes m+1 first magnets 311 fitted in each of the fitting holes 33 in turn, the first magnets 311 being magnetized in the Y direction and the magnetic poles of the adjacent first magnets 311 being opposite in direction. The m+1 first magnets 311 with magnetic poles alternately and reversely arranged along the Y direction can enable two adjacent first magnets 311 to be symmetrically distributed on the upper side and the lower side of one magnetic conduction part 11, so that when the magnetic conduction part 11 repels the first magnet 311 above, the first magnet 311 below can attract each other, and the magnetic conduction part 11 and the adjacent first magnet 311 generate mutual superposition homodromous magnetic coupling force, thereby improving vibration performance.

For example, each set of permanent magnets 31 includes (m+1)/2 second magnets 312 fitted in the respective fitting holes 33 in sequence, the second magnets 312 being magnetized in the X direction and the magnetic pole directions of the respective second magnets 312 being uniform. In this case, each of the second magnets 312 is disposed along the X direction, and the magnetic polarities at the two ends of the first magnet 311 and the magnetic conductive portions 11 are used to generate a coupling effect, as shown in fig. 4, with the stator core 10 with m=5, each corresponding set of permanent magnets 31 includes three second magnets 312, where the magnetic polarities of the two uppermost second magnets 312 on the two sides of the vibrator core 30 are opposite in the X direction, so that the two directions are actually equal to form two pairs of upper and lower magnetic poles in the Y direction, the directions of the X-directional coupling forces of the two pairs of magnetic poles to the same magnetic conductive portion 11 are the same, and the directions of the Y-directional coupling forces between the two magnetic conductive portions 11 aligned in the Y direction and the two pairs of magnetic poles are opposite, so that the driving effect of Y-directional cancellation and X-directional superposition are satisfied, and because each of the second magnets 312 is disposed in the X direction, the magnetic polarities at the two ends of the second magnets 312 can be utilized, so that the magnetic field utilization rate of the second magnets 312 is improved.

It should be noted that, in order to ensure that the elastic force applied to the frame-shaped vibrator 20 in the X direction is stable, and avoid the influence of the elastic element 21 on the vibration linearity caused by the Y-direction component force, referring to fig. 1, two elastic elements 21 are symmetrically distributed at two ends of the frame-shaped vibrator 20 with the vibrator iron core 30 as the center, and the elastic elements 21 are V-shaped or U-shaped spring pieces.

Since the elastic element 21 is V-shaped or U-shaped, the elastic force of a single pair of frame-shaped elements 20 is not necessarily in the absolute X-direction, and there is a Y-direction component force, so that the elastic forces applied to the frame-shaped elements 20 in the Y-axis direction can be balanced by canceling each other by using two elastic elements 21 symmetrically arranged back-to-back or face-to-face, and only the elastic force in the X-axis direction is applied, thereby improving the vibration output stability of the frame-shaped elements 20.

Based on the same inventive concept, as understood in connection with fig. 1 to 5, embodiments of the present application also provide a vibration motor including the above-described linear vibration assembly.

Compared with the prior art, the vibration motor provided by the embodiment guides and converges the magnetic field generated by the electromagnetic coil 40 through the symmetrically arranged stator iron cores 10 in the linear vibration assembly, so that the power performance can be improved, the number of the electromagnetic coils 40 can be reduced, the cost is reduced, and the market competitiveness of a product is improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A linear vibration assembly, comprising:

the two stator iron cores are fixedly connected in the motor shell and symmetrically distributed, m magnetic conduction parts are distributed on the stator iron cores at intervals along the X direction, and each magnetic conduction part extends towards the middle part of the motor shell; wherein m is a positive integer, and m is more than or equal to 3;

the frame-type vibrator is sleeved on the peripheries of the two stator cores, and two X-direction ends are respectively connected with the motor shell through a group of elastic elements;

the vibrator iron core is fixedly connected in the frame-type vibrator along the X direction and is positioned on symmetrical shafts of the two stator iron cores, a group of permanent magnets are respectively arranged on two sides of the vibrator iron core along the Y direction, the two groups of permanent magnets jointly form m+1 pairs of magnetic poles distributed in sequence along the X direction, and the juncture positions of two adjacent pairs of magnetic poles are aligned with one magnetic conduction part along the Y direction;

an electromagnetic coil is wound on at least one magnetic conduction part between the first magnetic conduction part and the m magnetic conduction part of the stator core along the X direction, and alternating current is introduced into the electromagnetic coil so that the extending ends of the magnetic conduction parts can obtain alternating magnetic polarities; two sets of magnetic coupling forces are formed between the two stator cores and the two sets of permanent magnets correspondingly, the two sets of magnetic coupling forces are equal in size and consistent in direction along the X direction, and the two sets of magnetic coupling forces are equal in size and opposite in direction along the Y direction.

2. The linear vibration assembly of claim 1, wherein the electromagnetic coil is wound around the second to m-1 th magnetically permeable portions of the stator core in the X-direction; where m=3 or m is an even number.

3. The linear vibration assembly of claim 1, wherein the electromagnetic coil is wound around each of the m-k th magnetically permeable portions of the stator core in the X-direction; wherein m and k are both odd numbers, and k is more than or equal to 1 and less than m.

4. The linear vibration assembly of claim 1 wherein the winding direction of the two electromagnetic coils aligned in the Y-axis direction on the two stator cores is the same.

5. The linear vibration assembly of claim 1, wherein grooves suitable for embedding and bonding fixing the ends of the vibrator core are formed in the inner walls of the two X-direction ends of the frame-shaped vibrator; each group of permanent magnets is magnetic steel with m+1 sections of magnetizing areas arranged along the X direction, each section of magnetizing area is magnetized along the Y direction, and the magnetic pole directions of adjacent magnetizing areas are opposite.

6. The linear vibration assembly of claim 1, wherein a plurality of insertion openings adapted to be inserted into and bonded to two sets of the permanent magnets are respectively provided at both sides of the vibrator core in the Y direction.

7. The linear vibration assembly of claim 6 wherein each set of said permanent magnets includes m+1 first magnets sequentially inserted into each of said insertion openings, said first magnets being magnetized in the Y direction and the magnetic poles of adjacent ones of said first magnets being opposite in direction.

8. The linear vibration assembly of claim 6 wherein each set of said permanent magnets includes (m+1)/2 second magnets sequentially inserted into each of said insertion openings, said second magnets being magnetized in the X-direction and the magnetic pole directions of each of said second magnets being uniform.

9. The linear vibration assembly of any one of claims 1 to 8, wherein two elastic elements are symmetrically distributed at two ends of the frame-shaped vibrator with the vibrator core as a center, and the elastic elements are V-shaped or U-shaped spring pieces.

10. A vibration motor comprising a linear vibration assembly according to any one of claims 1 to 9.