CN206349904U - A kind of linear vibration motor - Google Patents

Abstract

The utility model discloses a kind of linear vibration motor, its drive device and mass (6) for including shell (1) and being housed in shell (1), drive device include magnet assemblies (4) and with magnet assemblies (4) phase separation electromagnet, magnet assemblies (4) the relative mass block (6) is fixed；The relatively described shell (1) of the electromagnet is fixed, and electromagnet includes coil (2) and iron core (3), and the plane where coil (2) is parallel to direction of vibration.

Description

A kind of linear vibration motor

Technical field

The utility model is related to motor technologies field, more specifically, the utility model is related to a kind of linear vibration motor.

Background technology

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

Linear vibration motor generally includes oscillator part and stator part, and oscillator part further comprises mass, magnet With shell fragment etc., stator part further comprises FPCB, coil etc., wherein, coil and FPCB are fixedly connected on linear vibration motor Shell on, mass and magnet are fixed together, and shell fragment is connected between mass and shell, coil then be located at permanent magnetism In the magnetic field range of body.So, after coil electricity, coil is subject to Ampere force effect, because coil is fixedly connected outside On shell, therefore, oscillator part will carry out reciprocal regular vibration under the driving of the reaction force of Ampere force, and due to quality The quality of block is larger, and then can obtain the effect that whole linear vibration motor vibrates.

As can be seen here, the reaction force of above-mentioned Ampere force is unique power of drive vibrator partial vibration, but is limited to line The spatial volume of circle, coil turn and effective length are limited, and the Ampere force is generally smaller, and this is to cause existing motor to exist to ring Longer major reason between seasonable, therefore, is highly desirable to provide a kind of driving force that can increase and be supplied to oscillator part Motor configuration.

Utility model content

One purpose of the utility model embodiment is to provide a kind of new technical scheme of linear vibration motor, with to shaking Subdivision provides larger driving force.

According to first aspect of the present utility model there is provided a kind of linear vibration motor, it includes shell and is housed in Drive device and mass in the shell, the drive device include magnet assemblies and electric with the magnet assemblies phase separation Magnet, the relatively described mass of the magnet assemblies is fixed；The relatively described shell of the electromagnet is fixed, and the electromagnet includes Coil and iron core, the plane where the coil is parallel to direction of vibration, and the iron core includes the centre bore positioned at the coil In part.

Optionally, the magnet assemblies are included in the two blocks of side magnet arranged on the direction of vibration, one of side First edge of the magnet correspondence coil, the second edge of another piece of side magnet correspondence coil, two blocks of side magnet Magnetizing direction on the contrary, and the plane that is each perpendicular to where the coil.

Optionally, the magnet assemblies include one block of magnet, and the magnetizing direction of the magnet is parallel to the vibration side To, and a pole pair of the magnet answers the first edge of the coil, another pole pair to answer the second side of the coil Portion.

Optionally, the magnet assemblies also include two pieces of side washers, and one piece of side washer is arranged on one of the magnet On end face where magnetic pole, another piece of side washer is arranged on the end face where another magnetic pole of the magnet.

Optionally, the iron core also includes the part positioned at the dorsad described magnet assemblies side of the coil.

Optionally, the iron core has storage tank, and the coil is embedded in the storage tank, and the coil towards The surface of the magnet assemblies is exposed via the storage tank.

Optionally, the coil has the first edge and the second edge with the magnet assemblies phase separation, and described First edge is each perpendicular to the direction of vibration with second edge.

Optionally, the shell has magnetic-conductance portion, and the magnetic-conductance portion is located at the same of the magnet assemblies with the coil Side.

Optionally, the iron core is contacted with the magnetic-conductance portion.

Optionally, the linear vibration motor includes drive device described in two or more, and is driven described in two or more Device is arranged in order on the direction of vibration.

The beneficial effects of the utility model are that the utility model linear vibration motor sets cored, the iron core and line Circle constitutes electromagnet, and the electromagnet can give plus magnetic force when coil obtains electric to magnet assemblies, and then to transducer part, and should The direction that the reaction force of the Ampere force of magnetic circuit component is applied to when magnetic force obtains electric with coil is consistent, so, drives vibration component The driving force vibrated repeatedly by equal to the reaction force of Ampere force and the magnetic force and, and then increase effectively and carried to oscillator part The driving force of confession.

It is of the present utility model other by referring to the drawings to the detailed description of exemplary embodiment of the present utility model Feature and its advantage will be made apparent from.

Brief description of the drawings

The accompanying drawing for being combined in the description and constituting a part for specification shows embodiment of the present utility model, and And be used to explain principle of the present utility model together with its explanation.

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

Fig. 2 is the force analysis of the oscillator part of Fig. 1 linear vibration motors；

Fig. 3 is the structural representation of second of embodiment according to the utility model linear vibration motor；

Fig. 4 is the force analysis of the oscillator part of Fig. 3 linear vibration motors；

Fig. 5 is the structural representation of the third embodiment according to the utility model linear vibration motor；

Fig. 6 is the force analysis of the oscillator part of Fig. 5 linear vibration motors；

Fig. 7 is the structural representation of the 4th kind of embodiment according to the utility model linear vibration motor；

Fig. 8 is the structural representation of Fig. 1 another embodiments of electromagnet into Fig. 7；

Fig. 9 is the structural representation of Fig. 1 another embodiments of electromagnet into Fig. 7；

Figure 10 is the decomposition texture schematic diagram based on a kind of embodiment of the linear vibration motor of drive device in Fig. 5.

Description of reference numerals：

1- shells；11- upper casings；

12- lower casings；2- coils；

3- iron cores；31- is located at the part in the centre bore of coil；

The side of sidewall portion of 33- iron cores；32- is located at the part of the dorsad magnet assemblies side of coil；

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

42- center magnets；121- magnetic-conductance portions；

6- masses；7-V type shell fragments；

8-FPCB；9- limited blocks；

10- blocks；The reaction force of F1- Ampere forces；

The edge of 21- first；The edge of 22- second；

34- storage tanks；43- magnet；

44a, 44b- side washer；

The magnetic force that the side magnet of F21- electromagnet to the left applies；

The magnetic force that the side magnet of F22- electromagnet to the right applies.

Embodiment

Various exemplary embodiments of the present utility model are described in detail now with reference to accompanying drawing.It should be noted that：Unless another Illustrate outside, the part and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is not limited Make scope of the present utility model.

The description only actually at least one exemplary embodiment is illustrative below, never as to this practicality New and its application or any limitation used.

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

In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without It is as limitation.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, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.

Fig. 1 is main in a kind of simplification structural representation of embodiment according to the utility model linear vibration motor, figure Show the drive device part of linear vibration motor.Fig. 2 is the force analysis of the oscillator part of Fig. 1 linear vibration motors.

According to Fig. 1, the linear vibration motor includes shell 1 and the mass 6 being housed in shell 1 and driving Device etc., the drive device includes magnet assemblies 4 and the electromagnet positioned at the side of magnet assemblies 4, to pass through electromagnet and magnetic Interaction between iron component 4, which is produced, is used for the driving force that drive vibrator part vibrates repeatedly, and the electromagnet includes the He of coil 2 Iron core 3.

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

Electromagnet opposite shell 1 is fixed, and is made with producing magnetic when coil 2 obtains electric, and then producing magnetic force to magnet assemblies 4 With.

Plane where coil 2 is parallel to direction of vibration, and 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.Therefore, online The sense of current in circle 2 as depicted in figs. 1 and 2 when, according to right-hand screw rule iting can be seen from, the pole orientation of electromagnet is from upper finger Downwards, i.e., S is extremely above, and N poles are located at lower section.

In the embodiment shown in fig. 1, lower casing 12 can have magnetic-conductance portion 121, and magnetic-conductance portion 121 is located at magnet with coil 2 The same side of component 4, to be restrained by magnetic-conductance portion 121 to the magnetic line of force so that the magnetic field intensity of the side of coil 2 is added By force.

In the embodiment shown in fig. 1, can be with further such that iron core 3 be contacted with magnetic-conductance portion 121, to reduce magnetic resistance.

In the embodiment shown in fig. 1, lower casing 12 may further include the lower casing body of non-magnet material and be used as and leads The shielding piece in magnetic portion 121, the shielding piece is arranged on the outer wall of lower casing body, and coil 2 is fixedly connected on lower casing body, iron core 3 are fixedly connected on the shielding piece as magnetic-conductance portion 121 by the opening of lower casing body, to be contacted with magnetic-conductance portion 121.

In a further embodiment, the lower casing 12 integrally can also be made up of permeability magnetic material, so, and lower casing 12 itself just may be used Used as magnetic-conductance portion 121.

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 coil 2 and the effective length of 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, should be perpendicular to Direction of vibration is construed as the arc-shaped edges with the tangent line perpendicular to direction of vibration.

Magnet assemblies 4 can be configured to produce in opposite directions through the first edge 21 of coil 2 and the second side The magnetic line of force in portion 22, and the direction passed through is perpendicular to the plane where coil 2 or with perpendicular to the plane where coil 2 Direction on component, and then enable coil 2 the first edge 21 and the second edge 22 be powered when respectively to group of magnets Part 4 applies the reaction force of Ampere force along direction of vibration and in the same direction, and electromagnet can also be caused to magnet assemblies 4 Apply the magnetic force of equidirectional, the driving force added can be given to transducer part to increase drive device.

The magnet assemblies 4 can for example be included in two sides magnet 41a, the 41b arranged on direction of vibration, two blocks of side magnet 41a, 41b magnetizing direction on the contrary, and the plane that is each perpendicular to where coil 2, in the embodiment shown in fig. 1, namely vertically In lower casing 12.

In the embodiment shown in Fig. 1 and Fig. 2, the magnet assemblies 4 include two pieces of sides magnet 41a, 41b, side magnet 41a's Magnetizing direction is from bottom to up, i.e. the lower end of side magnet 41a is that S poles, upper end are N poles；And side magnet 41b magnetizing direction be from Under up to, i.e. the lower end of side magnet 41b is that N poles, upper end are S poles.

In a further embodiment or side magnet 41a magnetizing direction for from top to bottom, and side magnet 41b Magnetizing direction is from bottom to up.

Side magnet 41a the first edge 21 of correspondence, side magnet 41b the second edge 22 of correspondence, so, with magnetizing shown in Fig. 2 Exemplified by direction, the magnetic line of force that side magnet 41b is sent can be enabled to be passed through at least in part with the direction with vertical component Second edge 22, and the magnetic line of force for returning to side magnet 41a is passed through with the direction with vertical component at least in part First edge 21, and then produce the driving force along direction of vibration.

Further, the first edge 21 can also be made to be alignd with side magnet 41a, and cause the second edge 22 and side magnet 41b aligns, wherein, alignment is set to be the first edge 21 and is located at side magnet 41a on direction of vibration flat where coil 2 In the coverage of projection on face, the second edge 22 is located at side magnet 41b in the plane where coil 2 on direction of vibration Projection coverage in.So, equally by taking the magnetizing direction shown in Fig. 2 as an example, the magnetic that side magnet 41b can be caused to send The line of force largely can pass through the second edge 22 with generally vertical direction, and enable the magnetic line of force for returning to side magnet 41a It is most of that first edge 21 is passed through with generally vertical direction, and then realize effective utilization of drive device.

According to Fig. 2, the sense of current in coil 2 for cause the first edge 21 electric current is out of outer sensing and makes The second edge 22 electric current outside interior sensing when, electromagnet will apply magnetic force (repulsion) F21 to side magnet 41a, and to side magnetic Iron 41b applies magnetic force F22 (gravitation), and the two direction is identical, and according to left hand rule, coil 2 is applied to the ampere of magnet assemblies 4 The reaction force F1 of power direction is consistent with magnetic force F21, F22 direction.

When shown in relative Fig. 2 of electric current in coil 2 reversely, magnetic force F21, F22, and Ampere force F1 reaction force are also equal Will be reverse, that is, right side is directed to, and then the driving force vibrated repeatedly is provided to oscillator part.

Understand from the description above, for the utility model linear vibration motor, the drive that drive vibrator part vibrates repeatedly Therefore power, according to the technical solution of the utility model, be possible to equal to the reaction force of Ampere force and total magnetic force sum The driving force that effect increase is provided to oscillator part.

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, based on the need for coiling, the rectangle can be curved at corner.And cause above-mentioned first edge 21 and second Edge 22 is the long leg of coil 2, and then increases the effective length of coil 2.

In order in the case of same magnetic field intensity, improve the stress of magnet assemblies 4 and the harmony of stress, two pieces of sides Magnet 41a, 41b set location can on coil 2 the middle section perpendicular to direction of vibration it is symmetrical, wherein, the middle section By the center line of coil 2.

In order that stronger magneticaction can be produced to magnet assemblies 4 by obtaining electromagnet, the iron core 3 can at least include position Part in the centre bore of coil 2, so that coil 2 is set in outside the part, this can not only produce stronger magnetic force, also have Beneficial to balanced side magnet 41a and 41b stress.

In the embodiment shown in Fig. 1 and Fig. 2, the iron core 3 is fully located at the extension of the centre bore and centre bore of coil 2 In region.Moreover, further, the center line of the iron core 3 is overlapped with the center line of coil 2.

Fig. 3 is master in the simplification structural representation of second of embodiment according to the utility model linear vibration motor, figure Show the drive device part of linear vibration motor.Fig. 4 is the stress point of the oscillator part of Fig. 2 linear vibration motors Analysis.

According to Fig. 3, the main distinction of the embodiment and embodiment illustrated in fig. 1 is, the magnet assemblies 4 are on two pieces of sides On the basis of magnet 41a, 41b, also add one piece of center magnet 42, the center magnet 42 be folded in two pieces of side magnet 41a, Between 41b, and with two pieces of side magnet 41a, 41b formation Halbach (Halbach) arrays, this explanation, center magnet 42 fills Magnetic direction should be parallel to direction of vibration, and pointing to cause coil 2 and iron core 3 to be located at the high-intensity magnetic field side of magnet assemblies 4. In the embodiment shown in Fig. 3 and Fig. 4, the magnetizing direction of center magnet 42 is from left pointing right, i.e., left end is that S poles, right-hand member are N Pole.

When on side, magnet 41a, 41b magnetizing direction are reverse with respect to Fig. 2 respectively, the magnetizing direction of the center magnet 42 also should This reversely point to a left side from right.

Because Halbach array can produce unilateral Distribution of Magnetic Field, and logical too small amount of magnet produces most strong magnetic field, Therefore, it is possible to effectively improve the magnetic field intensity at the place of coil 2 by forming Halbach array, and then can be largely The reaction force for the Ampere force that increase coil 2 applies to magnet assemblies 4, can be to the offer of oscillator part to improve drive device Driving force.

As shown in figure 4, the force analysis of embodiment illustrated in fig. 3 and the force analysis of embodiment illustrated in fig. 1 are essentially identical, only It is that embodiment illustrated in fig. 3 has stronger magnetic field intensity in the side of coil 2.

Fig. 5 is master in the simplification structural representation according to the third embodiment of the utility model linear vibration motor, figure Show the drive device part of linear vibration motor.Fig. 6 is the stress point of the oscillator part of Fig. 5 linear vibration motors Analysis.

According to Fig. 5, in this embodiment, magnet assemblies 4 include one block of magnet 43, and the magnetizing direction of magnet 43 is parallel The first edge 21 of coil 2 is answered in a pole pair of direction of vibration, and magnet 43, another pole pair answers the second of coil 2 Edge 22.

In the embodiment shown in fig. 5, the magnetizing direction of magnet 43 is from left to right, i.e., the left end of magnet 43 is S poles, right Hold for N poles, therefore in this embodiment, the S of magnet 43 extremely corresponds to the first edge 21, and the N of magnet 43 extremely corresponds to the second edge 22.

In a further embodiment, the magnetizing direction of magnet 43 can also be from right to left, so that the N of magnet 43 is extremely corresponded to First edge 21, and the S of magnet 43 is extremely corresponded to the second edge.

According to Fig. 6, in this embodiment, the magnetic line of force for being sent from N poles and returning to S poles of magnet 43 is possible to substantially Pass through the first edge 21 and the second edge 22 of coil 2 with vertical direction, and through the in opposite direction of two edge 21,22, because This, coil 2 will apply the reaction force of Ampere force to the left to magnet 43, and electromagnet will apply magnetic to the left to magnet 43 Power, so enable the driving force that drive device provides be equal to Ampere force reaction force and magnetic force and, realize increase drive The purpose of power.

When shown in relative Fig. 6 of electric current in coil 2 reversely, the reaction force of magnetic and Ampere force also will be reverse, i.e., Right side is pointed to, and then the driving force vibrated repeatedly is provided to oscillator part.

In this embodiment, magnet assemblies 4 also include two pieces of sides washer 44a, 44b, and one piece of side washer 44a is arranged on magnet On end face where 43 S poles, another piece of side washer 44b is arranged on the end face where another magnetic pole N of magnet 43, with logical The magnetic line of force at side washer 44a, 44b amendment magnet 43 two ends is crossed, and then increases the magnetic line of force perpendicular to the plane where coil 2 Component on direction, even more so that the magnetic line of force is directly vertically through two edge 21,22.

The utility model linear vibration motor can include an above-mentioned drive device, can also be in a further embodiment Including two or more (including two) drive device, two or more drive device is arranged in order on direction of vibration, and this is in space Size will be further increased in the case of allowing can be supplied to the driving force of oscillator part.

Further, for the structure of the drive device shown in Fig. 1 and Fig. 3, two neighboring drive device can also be shared One block of side magnet, this causes the current direction of respective coil to meet the same time to oscillator in the wiring of the coil of each drive device The driving force that part applies equidirectional can obtain the effect being overlapped to driving force.

Fig. 7 is mainly shown in the structural representation of the 4th kind of embodiment according to the utility model linear vibration motor, figure The drive device part of linear vibration motor is gone out.

Fig. 7 is shown on the basis of Fig. 5 drive device, and the reality of two drive devices is arranged side by side on direction of vibration Apply example.

In this embodiment, the magnetizing direction of the magnet 43 of two neighboring drive device can be with the contrary, to cause magnet 43 The magnetic line of force that sends of N poles can mainly return to the S poles of itself, and then increase the effective of magnetic field space where respective coil 2 Magnetic field intensity.So, the wiring of the coil 2 of two neighboring drive device should cause the sense of current of the two also on the contrary, with reality The now superposition of the driving force of each drive device output.

Further, in this embodiment, two neighboring drive device can share one piece of side washer.

Relative to the electromagnet structure shown in Fig. 1 to Fig. 7, Fig. 8 shows another electromagnet structure.

According to Fig. 8, the embodiment and Fig. 1 into embodiment illustrated in fig. 7 unlike core structure, iron core 3 except Outside the part 31 in the centre bore of coil 2, in addition to the part 32 positioned at the side of dorsad magnet assemblies 4 of coil 2, enter And cause iron core 3 in inverted T shaped.In this embodiment, coil 2 can be directly fixedly connected on the part 32 of iron core.

Relative to the electromagnet structure shown in Fig. 1 to Fig. 7, Fig. 9 is also shown for another electromagnet structure.

According to Fig. 9, the embodiment from unlike Fig. 1 to embodiment illustrated in fig. 7, iron core 3 is except positioned at coil 2 Part 31 in centre bore and outside the part 32 of the side of dorsad magnet assemblies 4 of coil 2, is additionally included in and wraps around line The side of sidewall portion 33 of circle 2, the i.e. iron core 3 one storage tank 34 of formation, and coil 2 is then embedded in the storage tank 34.

Figure 10 is a kind of decomposition texture schematic diagram of embodiment of the linear vibration motor based on drive device shown in Fig. 5.

The oscillator part of linear vibration motor, including magnet assemblies 4, mass 6 and two V-type shell fragments are shown in Figure 10 7, the relative mass block 6 of magnet assemblies 4 is fixed, and two V-type shell fragments 7 set up separately on direction of vibration in the both sides of mass 6, and opening In the opposite direction, wherein, a free end of each V-type shell fragment 7 is fixedly connected with mass 6, another free end and upper casing 11 It is fixedly connected.

Two V-type shell fragments 7 are disposed with beneficial to the stationarity for improving oscillator partial vibration in opposite direction, reduced humorous Shake.

The stator part of linear vibration motor, including coil 2, iron core 3, flexible PCB 8 are also show in Figure 10 (FPCB), the flexible PCB 8 exposes lead and/or pad via lower casing 12.

The other parts of linear vibration motor, including limited block 9, block 10 etc. are also show in Figure 10.

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

It is described above each embodiment of the present utility model, described above is exemplary, and non-exclusive, and And it is also not necessarily limited to disclosed each embodiment.In the case of without departing from the scope and spirit of illustrated each embodiment, for Many modifications and changes will be apparent from for those skilled in the art.The choosing of term used herein Select, it is intended to best explain the principle, practical application or the technological improvement to the technology in market of each embodiment, or make this skill Other those of ordinary skill in art field are understood that each embodiment disclosed herein.Scope of the present utility model will by appended right Ask to limit.

Claims (10)

1. a kind of linear vibration motor, it is characterised in that filled including shell (1) and the driving being housed in the shell (1) Put with mass (6), the drive device include magnet assemblies (4) and with the magnet assemblies (4) phase separation electromagnet, it is described The relatively described mass (6) of magnet assemblies (4) is fixed；The relatively described shell (1) of the electromagnet is fixed, and the electromagnet includes Coil (2) and iron core (3), the plane where the coil (2) is parallel to direction of vibration, and the iron core (3) is included positioned at described Part (31) in the centre bore of coil (2).

2. linear vibration motor according to claim 1, it is characterised in that the magnet assemblies (4) are included in described shake The two pieces of side magnet (41a, 41b) arranged on dynamic direction are one of in the first of magnet (41a) the correspondence coil (2) Portion (21), the second edge (22) of another piece of side magnet (41b) the correspondence coil (2), two blocks of side magnet (41a, 41b) Magnetizing direction on the contrary, and the plane that is each perpendicular to where the coil (2).

3. linear vibration motor according to claim 1, it is characterised in that the magnet assemblies (4) include one block of magnet (43), the magnetizing direction of the magnet (43) is parallel to the direction of vibration, and a pole pair of the magnet (43) answers institute State the second edge (22) that the first edge (21) of coil (2), another pole pair answer the coil (2).

4. linear vibration motor according to claim 3, it is characterised in that the magnet assemblies (4) also include two pieces of sides Washer (44a, 44b), one piece of side washer (44a) is arranged on the end face where a magnetic pole of the magnet (43), another piece Side washer (44b) is arranged on the end face where another magnetic pole of the magnet (43).

5. linear vibration motor according to claim 1, it is characterised in that the iron core (3) also includes being located at the line Enclose the part (32) of dorsad described magnet assemblies (4) side of (2).

6. linear vibration motor according to claim 5, it is characterised in that the iron core (3) has storage tank (34), institute Coil (2) is stated to be embedded in the storage tank (34), and the coil (2) the surface towards the magnet assemblies (4) via institute State storage tank (34) exposed.

7. linear vibration motor according to claim 1, it is characterised in that the coil (2) has and the group of magnets First edge (21) and the second edge (22) of part (4) phase separation, and first edge (21) and second edge (22) It is each perpendicular to the direction of vibration.

8. linear vibration motor according to claim 1, it is characterised in that the shell (1) has magnetic-conductance portion (121), The magnetic-conductance portion (121) is located at the same side of the magnet assemblies with the coil (2).

9. linear vibration motor according to claim 8, it is characterised in that the iron core (3) and the magnetic-conductance portion (121) Contact.

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