CN106655699A

CN106655699A - Linear vibration motor

Info

Publication number: CN106655699A
Application number: CN201611087748.5A
Authority: CN
Inventors: 秦小森; 祖峰磊
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2017-05-10
Anticipated expiration: 2036-11-30
Also published as: CN106655699B

Abstract

The invention discloses a linear vibration motor, which comprises a housing and a drive device accommodated in the housing, wherein the drive device comprises a coil and a magnet assembly; the housing is provided with a magnetic conducting part, a plane in which the coil is located is parallel to a vibration direction and the magnetic conducting part and the coil are separately arranged at two sides of the magnet assembly; and the magnet assembly comprises two radial magnets and two parallel magnets, the two radial magnets are opposite in the vibration direction, magnetization directions of the two radial magnets are opposite and are vertical to the plane in which the coil is located and the magnetization directions of the two parallel magnets are opposite and are parallel to the vibration direction, wherein one parallel magnet and the two radial magnets form a first Halbach array at one side of the coil, the other parallel magnet and the two radial magnets form a second Halbach array at one side of the magnetic conducting part, the coil is located at one side of a high-intensity magnetic field of the first Halbach array and the magnetic conducting part is located at one side of a high-intensity magnetic field of the second Halbach array.

Description

A kind of linear vibration motor

Technical field

The present invention relates to motor technologies field, more particularly it relates to a kind of linear vibration motor.

Background technology

With the development of the communication technology, portable electric appts, such as mobile phone, panel computer, multimedia entertainment equipment etc. Have become the necessity for life of people.In these electronic equipments, miniature linear vibration motor is usually used to do system Feedback, the vibrational feedback of such as incoming call prompt of mobile phone etc..

Linear vibration motor generally includes oscillator and stator, and oscillator further includes mass, magnet assemblies and shell fragment etc., Stator further includes FPCB, coil etc., wherein, coil and FPCB are fixedly connected on the shell of linear vibration motor, quality Block and magnet assemblies are fixed together, and shell fragment is connected between mass and shell, and coil is then produced positioned at magnet assemblies Magnetic field range in.So, after coil electricity, coil is subject to Ampere force effect, because coil is fixedly connected on shell On, therefore, oscillator will carry out reciprocal regular vibration under the driving of the reaction force of Ampere force, and due to the matter of mass Amount is larger, and then can obtain the effect that whole linear vibration motor occurs vibration.

As can be seen here, the reaction force of above-mentioned Ampere force is unique power of drive vibrator vibration, but is limited to coil Spatial volume, coil turn and effective length it is limited, the Ampere force is generally less, when this is to cause existing motor to there is response Between longer major reason, therefore, be highly desirable to provide a kind of motor configuration that can increase the driving force for being supplied to oscillator.

The content of the invention

One purpose of the embodiment of the present invention is to provide a kind of new technical scheme of linear vibration motor, can with increase It is supplied to the driving force of oscillator.

According to the first aspect of the invention, there is provided a kind of linear vibration motor, it includes shell and is housed in described outer Driving means in shell, the driving means include coil and magnet assemblies；The shell has magnetic-conductance portion, and the coil is located Plane parallel to direction of vibration, the magnetic-conductance portion sets up separately in the both sides of the magnet assemblies with the coil；

The magnet assemblies have two pieces of radial magnets magnet parallel with two pieces, and two pieces of radial magnets are in the vibration On direction relatively, the magnetizing direction of two pieces of radial magnets is contrary and is each perpendicular to the plane that the coil is located, wherein one Block radial magnet corresponds to first edge (21) of the coil, and another piece of radial magnet corresponds to the second edge of the coil, institute The magnetizing direction of two blocks of parallel magnet is stated on the contrary and each parallel to the direction of vibration, one of parallel magnet is in the line Circle side and two pieces of radial magnets constitute the first Halbach array, another block of parallel magnet the magnetic-conductance portion side with Two pieces of radial magnets constitute the second Halbach array, and cause the coil to be located at first Halbach array High-intensity magnetic field side and cause the magnetic-conductance portion be located at second Halbach array high-intensity magnetic field side.

Optionally, the volume of the parallel magnet of first Halbach array is more than or equal to second Haier The volume of the parallel magnet of Bake array.

Optionally, first edge and second edge are each perpendicular to the direction of vibration.

Optionally, middle section pair perpendicular to the direction of vibration of the two pieces of radial magnets with regard to the coil Claim.

Optionally, the driving means also include iron core, and the iron core constitutes electromagnet, the iron core with the coil Including the part in the centre bore of the coil.

Optionally, the shell also has another magnetic-conductance portion, and another magnetic-conductance portion and the coil are located at described the The same side of one Halbach array.

Optionally, the shell includes upper casing and the lower casing for linking together, and the lower casing is located at institute with the coil State the same side of the first Halbach array；The upper casing is integrally made up of permeability magnetic material, the upper casing parallel under described The top of shell is the magnetic-conductance portion.

Optionally, the shell includes upper casing and the lower casing for linking together, and the lower casing is located at institute with the coil State the same side of the first Halbach array；The upper casing includes the upper casing body of non-magnet material and as the magnetic-conductance portion Shielding piece, the shielding piece is arranged on the upper casing body.

Optionally, the linear vibration motor includes driving means described in two or more, and drives described in two or more Device is arranged in order on the direction of vibration.

Optionally, two neighboring driving means share one piece of radial magnet.

The beneficial effects of the present invention is, the driving means of linear vibration motor of the present invention are defined again using four blocks of magnet Mould assembly Halbach array, that is, include the first Halbach array with coil phase separation and with the magnetic-conductance portion phase separation of shell Second Halbach array, because Halbach array can produce monolateral high-intensity magnetic field with magnet as few as possible in side, Therefore, when coil to be arranged on the high-intensity magnetic field side of the first Halbach array, the drive for being supplied to oscillator can just be significantly increased Power.But, also due to the electricity such as the effect of the high-intensity magnetic field, coil, magnetic device may be to magnet assemblies and then to whole oscillators Apply downward suction, therefore, effect of the present invention further through the high-intensity magnetic field of the second Halbach array to magnetic-conductance portion so that lead Magnetic portion produces suction upwards to magnet assemblies, this just can pass through this kind of structure realize suction and downward suction upwards it Between balance, solve the single Halbach array of setting and may interfere with asking for movement locus of the oscillator on direction of vibration Topic, it is ensured that actual resonant frequency is basically identical with the resonant frequency of design, while the also bullet of effective protection linear vibration motor Piece is injury-free.

By referring to the drawings to the present invention exemplary embodiment detailed description, the present invention further feature and its Advantage will be made apparent from.

Description of the drawings

It is combined in the description and the accompanying drawing of the part that constitutes specification shows embodiments of the invention, and even It is used to together explain the principle of the present invention with its explanation.

Fig. 1 is a kind of structural representation of the embodiment according to linear vibration motor of the present invention；

Fig. 2 is the structural representation of driving means in Fig. 1；

Fig. 3 is the structural representation of another kind of embodiment according to linear vibration motor of the present invention

Fig. 4 is the decomposition texture schematic diagram based on a kind of embodiment of the linear vibration motor of driving means in Fig. 2.

Description of reference numerals：

1- shell 11- upper casings；

12- lower casings；2- coils；

4- magnet assemblies；41a, 41b- radial magnet；

The parallel magnet of 42a, 42b-；3- iron cores；

6- masses；7-V type shell fragments；

8-FPCB；9- limited blocks；

10- blocks；121- magnetic-conductance portions.

S- gaps；111- magnetic-conductance portions.

Specific embodiment

Describe the various exemplary embodiments of the present invention in detail now with reference to accompanying drawing.It should be noted that：Unless had in addition Body illustrates that the part and the positioned opposite of step, numerical expression and numerical value for otherwise illustrating in these embodiments does not limit this The scope of invention.

It is below illustrative to the description only actually of at least one exemplary embodiment, never as to the present invention And its any restriction applied or use.

For technology, method and apparatus may be not discussed in detail known to person of ordinary skill in the relevant, but suitable In the case of, the technology, method and apparatus should be considered a part for specification.

In all examples shown here and discussion, any occurrence should be construed as merely exemplary, and not It is as restriction.Therefore, other examples of exemplary embodiment can have different values.

It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined in individual accompanying drawing, then it need not be further discussed in subsequent accompanying drawing.

Fig. 1 is a kind of simplified structural representation of the embodiment according to linear vibration motor of the present invention, is mainly illustrated in figure The driving means part of linear vibration motor, and the direction of arrow is the magnetizing direction of correspondence magnet in figure.Fig. 2 is driven in Fig. 1 The structural representation of dynamic device part.

According to Fig. 1, the linear vibration motor is including shell 1 and the mass 6 being housed in shell 1 and drives Device, the driving means include magnet assemblies 4 and coil 2.

For the ease of carrying out the assembling of linear vibration motor, the shell 1 can include upper casing 11 and lower casing 12, the two fastening And link together.

The relative lower casing 12 of coil 2 is fixed, and this can be that coil 2 is fixedly bonded on lower casing 12, or by coil 2 It is fixedly bonded on lower casing 12 by insulating paper etc..

Coil 2 be located plane parallel to direction of vibration, therefore, the centerline direction of coil 2 will be perpendicular to direction of vibration, In the embodiment shown in fig. 1, direction of vibration is left and right directions, and the centerline direction of coil 2 is above-below direction.

Coil 2 has the first edge 21 and the second edge 22, and two edge 21,22 can be each perpendicular to direction of vibration, with Increase the effective length of coil 2 and the phase separation of magnet assemblies 4, be perpendicular to the direction of paper in the embodiment shown in fig. 1.

The edge 22 of first edge 21 and second can be straight flange, or arc-shaped edges, for arc-shaped edges, and should be perpendicular to Direction of vibration is construed as the arc-shaped edges with the tangent line perpendicular to direction of vibration.

In order in the case of same magnetic field intensity, improve the reaction force of above-mentioned Ampere force, coil 2 can be rectangular Shape, here, the needs based on coiling, the rectangle can be curved at corner.And so that above-mentioned first edge 21 and second Edge 22 is two long legs of coil 2, and then increases the effective length of coil 2.

The relative mass block 6 of magnet assemblies 4 is fixed, and to become a part for oscillator, can be applied to improve coil 2 The driving force of oscillator, above-mentioned magnet assemblies 4 define Halbach (Halbach) array, and the Halbach array is by radially The array that magnet is combined together with parallel magnet array, wherein, the radial magnet of Halbach array is that magnetizing direction is vertical The magnet of the plane being located in coil 2, the parallel magnet of Halbach array is magnet of the magnetizing direction parallel to direction of vibration.

Specifically, as depicted in figs. 1 and 2, the magnet assemblies 4 include two pieces of radial magnets 41a, 41b and parallel magnet 42a, this two pieces of radial magnets 41a, 41b are relative on direction of vibration, this parallel magnet 42a be folded in two pieces of radial magnets 41a, Between 41b, the magnetizing direction of radial magnet 41a for from bottom to up, i.e., the lower end of radial magnet 41a be S poles, upper end be N poles, and The magnetizing direction of radial magnet 41b for from top to bottom, i.e., the lower end of radial magnet 41b be N poles, upper end be S poles, parallel magnet The magnetizing direction of 42a for from left pointing right, i.e., left end be S poles, right-hand member be N poles, with by two pieces of radial magnets 41a, 41b peace Row magnet 42a forms the first Halbach array, and causes coil 2 to be located at the high-intensity magnetic field side of the first Halbach array.

In a further embodiment, or radial magnet 41a magnetizing direction for from top to bottom, and radial magnet The magnetizing direction of 41b is for from bottom to up, and the magnetizing direction of parallel magnet 42a also should be reverse, be changed into from it is right point to it is left, to protect Card produces high-intensity magnetic field in the side of coil 2.

Above-mentioned radial magnet 41a the first edge 21 of correspondence, radial magnet 41b the second edge 22 of correspondence, so, with Fig. 1 and As a example by magnetizing direction shown in Fig. 2, the magnetic line of force that radial magnet 41b sends can be enabled at least in part with vertical The direction of component passes through the second edge 22, and enables to return to the magnetic line of force of radial magnet 41a at least in part with perpendicular The direction of straight component passes through the first edge 21, and then produces the driving force along direction of vibration.

Further, the first edge 21 can also be made to align with radial magnet 41a, and causes the second edge 22 and radial direction magnetic Iron 41b aligns, wherein, alignment is set to be the first edge 21 and is located in coil 2 positioned at radial magnet 41a on direction of vibration Plane on projection coverage in, the second edge 22 is located at radial magnet 41b on direction of vibration and is located in coil 2 In the coverage of the projection in plane.So, equally by taking the magnetizing direction shown in Fig. 1 as an example, radial magnet 41b can be caused The magnetic line of force for sending most of can pass through the second edge 22 with generally vertical direction, and cause to return to radial magnet 41a The magnetic line of force most of can pass through the first edge 21 with generally vertical direction, and then realize the effectively utilizes of driving means.

Moreover, it is also possible to further for two pieces of radial magnets 41a, 41b set location with regard to coil 2 perpendicular to vibration The middle section in direction is symmetrical, to improve the stress of oscillator and the harmony of stress, wherein, the middle section is through the center of coil 2 Line.

So, according to Fig. 1, the sense of current in coil 2 be cause the first edge 21 electric current from outer sensing, And when causing the electric current of the second edge 22 from outside interior sensing, coil 2 will apply the reaction of Ampere force to the left to magnet assemblies 4 Power.And when shown in the relative Fig. 1 of electric current in coil 2 reversely, the reaction force of Ampere force will be changed into the right, and then drive vibrator Vibrate repeatedly.

Because Halbach array can produce monolateral magnetic field, most strong magnetic is produced in side to lead to too small amount of magnet , therefore, in the case where coil 2 is arranged on the high-intensity magnetic field side of the first Halbach array, it is possible to effectively improve coil 2 The magnetic field intensity at place, and then improve the driving force vibrated repeatedly for drive vibrator.

But, also due to the effect of the high-intensity magnetic field of the first Halbach array generation, what coil 2, lower casing 12 were arranged leads The device of the effect that the shielding piece etc. arranged in magnetic portion, lower casing 12 can produce power with the first Halbach array may be to whole Oscillator applies downward suction, and the downward suction will disturb movement locus of the oscillator on direction of vibration so that design Resonant frequency deviates with respect to actual conditions, while also causing larger damage to the shell fragment of linear vibration motor.

Therefore, in the present invention, as depicted in figs. 1 and 2, the magnet assemblies 4 also include another parallel magnet 42b, and this is put down Row magnet 42b is equally folded between two pieces of radial magnets 41a, 41b in the top of parallel magnet 42a, with two blocks of radial direction magnetic Iron 41a, 41b form the second Halbach array.

The magnetizing direction of the magnetizing direction of the parallel magnet 42b and parallel magnet 42a is conversely, with the second Halbach battle array Row top produces high-intensity magnetic field.

At the same time, the upper casing 11 is provided with magnetic-conductance portion 111, and the magnetic-conductance portion 111 sets up separately in magnet assemblies 4 with coil 2 Both sides, so that magnetic-conductance portion 111 is located at the high-intensity magnetic field side of the second Halbach array, so that it is extra large with second by magnetic-conductance portion 111 Your Bake array phase separation applies suction upwards to magnet assemblies 4, and to balance above-mentioned downward suction, this just can increase The movement locus of above-mentioned interference oscillator is solved the problems, such as while large driving force.

In the embodiment shown in fig. 1, the upper casing 11 is overall is made up of permeability magnetic material, therefore, upper casing 11 parallel under The top of shell 12 may act as the magnetic-conductance portion 111.

In a further embodiment, the upper casing 11 can also include two parts, i.e., upper casing body including non-magnet material, And the shielding piece being arranged on upper casing body, the shielding piece sets up separately in the both sides of magnet assemblies 4 as magnetic-conductance portion 111 and coil 2, Wherein, the shielding piece can be arranged on the inwall of upper casing body and/or outer wall.

In order to further improve driving force by limited space, in the embodiment shown in fig. 1, the first Halbach battle array Volume of the volume of the parallel magnet 42a of row more than the parallel magnet 42b of the second Halbach array, so that the energy of magnet assemblies 4 It is enough that higher magnetic field is produced in the side of coil 2.Here, can be by the area to magnetic-conductance portion 111 and/or in the side energy of coil 2 Enough parts for further producing downward suction with the first Halbach array phase separation are adjusted to reach the suction for causing upwards The purpose of power and downward suction equalization.

Gap S should be left between the magnet assemblies 4 and magnetic-conductance portion 111, it is unaffected with the vibration for ensureing oscillator.

In order to the magnetic line of force of the magnetic field space being located to coil 2 is restrained, further to strengthen the magnetic field intensity of the side, In this embodiment, lower casing 12 includes lower casing body (non-magnet material) and the shielding piece being arranged on the outer wall of lower casing body Used as magnetic-conductance portion 121, the magnetic-conductance portion 121 is arranged on the same side of the first Halbach array with coil 2.

Because linear vibration motor of the present invention is provided with the Halbach array of magnetic-conductance portion 111 and second, therefore, this is used as leading The shielding piece in magnetic portion 121 can also be arranged on the inwall of lower casing body, as long as by configuring the suction upwards caused to oscillator Power reaches balance with downward suction.

In the further embodiment of the present invention, the lower casing 12 integrally can also be made up of permeability magnetic material, so, lower casing 12 Entirety can be used as magnetic-conductance portion 121 and use.

Fig. 3 is the structural representation of another kind of embodiment according to linear vibration motor of the present invention, is basically illustrated in figure The driving means part of linear vibration motor, and the direction of arrow is the magnetizing direction of correspondence magnet in figure.

According to Fig. 3, the embodiment is differred primarily in that with embodiment illustrated in fig. 1, and driving means also include iron core 3, the iron core 3 is also fixed with respect to lower casing 12, and constitutes electromagnet with coil 2, to produce magnetic field when coil 2 obtains electric and then right First Halbach array produces magneticaction.

In having the embodiment of magnetic-conductance portion 121 with reference to lower casing 12, the iron core 3 can be contacted or solid with magnetic-conductance portion 121 Fixed connection.

The magnetic line of force can be restrained by arranging magnetic-conductance portion 121 so that the magnetic field intensity of the side of coil 2 is added By force.

And iron core 3 is contacted with magnetic-conductance portion 121, it is possible to reduce magnetic resistance.

The iron core 3 can include the part being located in the centre bore of coil 2, to improve the active force of electromagnet.

Further, the iron core 3 can also include the part of the side of dorsad magnet assemblies 4 for being located at coil 2, and then cause Iron core 3 is in inverted T shape.In this embodiment, coil 2 can be directly fixedly connected on the part of iron core.

Further, the iron core 3 is except the part in the centre bore of coil 2 and the dorsad magnetic circuit system positioned at coil 2 Unite outside the part of 4 sides, be additionally included in the side of sidewall portion for wrapping around coil 2, be i.e. one storage tank of formation of iron core 3, and line Circle 2 then can be embedded in the storage tank 34.

So, according to Fig. 3, the sense of current in coil 2 be cause the first edge 21 electric current from outer sensing, And when causing the electric current of the second edge 22 from outside interior sensing, electromagnet will apply magnetic force (repulsion) to the left to radial magnet 41a, And the magnetic force (gravitation) for also applying to the left to radial magnet 41b, the two direction is identical, and according to left hand rule, coil 2 is applied to The direction of the reaction force of the Ampere force of the first Halbach array is also consistent with the direction of the magnetic force.

When shown in the relative Fig. 3 of electric current in coil 2 reversely, the reaction force of magnetic force and Ampere force also will be reverse, i.e., Right side is directed to, and then the driving force vibrated repeatedly is provided to oscillator.

Understand from the description above, for linear vibration motor of the present invention, the driving force that drive vibrator is vibrated repeatedly is incited somebody to action etc. In reaction force and the total magnetic force sum of Ampere force, therefore, technology according to the present invention scheme is possible to further to increase to shaking The driving force that son is provided.

In this embodiment, iron core 3 is applied to the downward suction of the first Halbach array can equally pass through magnetic conduction The suction upwards that 111 pairs of the second Halbach arrays in portion apply is balanced, therefore, technology according to the present invention scheme is by energy It is enough to realize increase driving force simultaneously and ensure the interference-free purpose of movement locus of oscillator.

Linear vibration motor of the present invention can include an above-mentioned driving means, it is also possible to include in a further embodiment Two or more (including two) driving means, two or more driving means are arranged in order on direction of vibration, and this is in bulk Will be further increased in the case of permission can be supplied to the driving force of oscillator.

Further, for the embodiment for arranging two or more driving means, the Halbach of two neighboring driving means Array can share one piece of radial magnet, accordingly, two adjacent edge of two neighboring coil 2, i.e., the of one coil 2 First edge 21 of two edge 22 and adjacent windings 2, will align with same radial magnet.This coil in each driving means Wiring cause the current direction of respective coil meet the same time to oscillator apply equidirectional driving force can obtain to drive The effect that power is overlapped.

The oscillator of linear vibration motor, including magnet assemblies 4, mass 6 and two V-type shell fragments 7, magnetic are shown in Fig. 4 The relative mass block 6 of iron component 4 is fixed, and two V-type shell fragments 7 set up separately in the both sides of mass 6 on direction of vibration, and opening direction Conversely, wherein, a free end of each V-type shell fragment 7 is fixedly connected with mass 6, and another free end is fixed with upper casing 11 Connection.

Two V-type shell fragments 7 are disposed with opposite direction beneficial to the stationarity for improving oscillator vibration, resonance is reduced.

The stator of linear vibration motor, including coil 2, flexible PCB 8 (FPCB), the flexible electrical are also show in Fig. 4 Road plate 8 exposes lead and/or pad via lower casing 12.

Also show the other parts of linear vibration motor in Fig. 4, including limited block 9, block 10 etc..

The various embodiments described above primary focus describe the difference with other embodiment, but those skilled in the art should be clear Chu, the various embodiments described above can as needed be used alone or be combined with each other.

It is described above various embodiments of the present invention, described above is exemplary, and non-exclusive, and It is not limited to disclosed each embodiment.In the case of the scope and spirit without departing from illustrated each embodiment, for this skill Many modifications and changes will be apparent from for the those of ordinary skill in art field.The selection of term used herein, purport Best explaining principle, practical application or the technological improvement to the technology in market of each embodiment, or lead this technology Other those of ordinary skill in domain are understood that each embodiment disclosed herein.The scope of the present invention is limited by claims It is fixed.

Claims

1. a kind of linear vibration motor, it is characterised in that including shell (1) and the driving means being housed in the shell (1), The driving means include coil (2) and magnet assemblies (4)；The shell (1) is with magnetic-conductance portion (111), coil (2) institute Plane parallel to direction of vibration, the magnetic-conductance portion (111) is set up separately the two of the magnet assemblies (4) with the coil (2) Side；

The magnet assemblies (4) with two pieces of radial magnets (41a, 41b) magnet (42a, 42b) parallel with two pieces, described two pieces Radial magnet (41a, 41b) is relative on the direction of vibration, the magnetizing direction phase of two pieces of radial magnets (41a, 41b) Instead and it is each perpendicular to the plane at the coil (2) place, the first of one of radial magnet (41a) the correspondence coil (2) Edge (21), another piece of radial magnet (41b) corresponds to second edge (22) of the coil (2), two blocks of parallel magnet , on the contrary and each parallel to the direction of vibration, one of parallel magnet (42a) is in the line for the magnetizing direction of (42a, 42b) Circle (2) side constitutes the first Halbach array, another piece of parallel magnet (42b) with two pieces of radial magnets (41a, 41b) In the magnetic-conductance portion (111) side and two pieces of radial magnets (41a, 41b) the second Halbach array of composition, and cause institute Coil (2) is stated positioned at the high-intensity magnetic field side of first Halbach array and the magnetic-conductance portion (111) is caused positioned at described the The high-intensity magnetic field side of two Halbach arrays.

2. linear vibration motor according to claim 1, it is characterised in that the parallel magnetic of first Halbach array Volume of the volume of iron (42a) more than or equal to the parallel magnet (42b) of second Halbach array.

3. linear vibration motor according to claim 1, it is characterised in that first edge (21) and second side Portion (22) is each perpendicular to the direction of vibration.

4. linear vibration motor according to claim 3, it is characterised in that two pieces of radial magnets (41a, 41b) are closed It is symmetrical in the middle section perpendicular to the direction of vibration of the coil (2).

5. linear vibration motor according to claim 1, it is characterised in that the driving means also include iron core (3), institute State iron core (3) and constitute electromagnet with the coil (2), the iron core (3) includes the portion being located in the centre bore of the coil (2) Point.

6. linear vibration motor according to claim 1, it is characterised in that the shell (1) also has another magnetic-conductance portion (121), another magnetic-conductance portion (121) with the coil (2) positioned at the same side of first Halbach array.

7. linear vibration motor according to claim 1, it is characterised in that the shell (1) is including what is linked together Upper casing (11) and lower casing (12), the lower casing (12) is with the coil (2) positioned at the same side of first Halbach array； The upper casing (11) is integrally made up of permeability magnetic material, and the top parallel to the lower casing (12) of the upper casing (11) is led for described Magnetic portion (111).

8. linear vibration motor according to claim 1, it is characterised in that the shell (1) is including what is linked together Upper casing (11) and lower casing (12), the lower casing (12) is with the coil (2) positioned at the same side of first Halbach array； The upper casing body and the shielding piece as the magnetic-conductance portion (111) of the upper casing (11) including non-magnet material, the shielding piece It is arranged on the upper casing body.

9. linear vibration motor according to any one of claim 1 to 8, it is characterised in that the linear vibration motor Including driving means described in two or more, and driving means described in two or more are arranged in order on the direction of vibration.

10. linear vibration motor according to claim 9, it is characterised in that two neighboring driving means share one piece of footpath To magnet.