CN214228101U

CN214228101U - Linear vibration motor and electronic apparatus

Info

Publication number: CN214228101U
Application number: CN202023331673.5U
Authority: CN
Inventors: 史德璋; 毛东升; 张雨晴; 郑国敬
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-09-17
Anticipated expiration: 2030-12-30
Also published as: WO2022142188A1

Abstract

The utility model discloses a linear vibration motor and electronic equipment. The linear vibration motor comprises a shell, a vibrator component and a stator component fixed on the shell, wherein the vibrator component comprises a balancing weight and a magnet component, the balancing weight is vibratably arranged in the shell, a through hole is formed in the balancing weight along the direction perpendicular to the vibration direction of the balancing weight, the stator component comprises a coil, the coil is arranged in the through hole in a penetrating mode, and the axial direction of the coil is perpendicular to the vibration direction of the balancing weight; the magnet assembly is arranged on the hole wall of the through hole, and the direction of acting force borne by the magnet assembly when the coil is electrified is the same as the vibration direction of the balancing weight. The technical scheme of the utility model can improve stator module's magnetic field effective utilization, drive power great, vibration response is very fast, and linear vibrating motor obtains the vibration performance of preferred.

Description

Linear vibration motor and electronic apparatus

Technical Field

The utility model relates to a vibrating device technical field, in particular to linear vibrating motor and electronic equipment.

Background

With the development of communication technology, portable electronic products, such as mobile phones, handheld game consoles or handheld multimedia entertainment devices, have come into the lives of people. In these portable electronic products, a linear motor is generally used as an actuator for tactile feedback, such as vibration feedback of clicking a touch screen.

Among the correlation technique, linear vibrating motor includes the casing, vibrator subassembly and stator module, vibrator subassembly includes the balancing weight, stator module includes the coil in the iron core and the cover is located the iron core outside, at the during operation, stator module's coil circular telegram and production magnetic field, the iron core produces ampere force under the effect in magnetic field, the balancing weight takes place reciprocating vibration under the ampere force effect that stator module produced, this kind of structural design often has magnetic field effective utilization ratio lower, drive power is little, the slow scheduling problem of vibration response.

SUMMERY OF THE UTILITY MODEL

The present invention provides a linear vibration motor and an electronic device, which are intended to solve the problem of the linear vibration motor in the related art.

In order to achieve the above object, the present invention provides a linear vibration motor, including casing, vibrator subassembly and being fixed in the stator module of casing, the vibrator subassembly includes: the balancing weight is arranged in the shell in a vibrating manner, a through hole is formed in the balancing weight along the direction perpendicular to the vibrating direction of the balancing weight, the stator assembly comprises a coil, the coil is arranged in the through hole in a penetrating manner, and the axial direction of the coil is perpendicular to the vibrating direction of the balancing weight; and the magnet assembly is arranged on the hole wall of the through hole, and the direction of acting force applied to the magnet assembly when the coil is electrified is the same as the vibration direction of the balancing weight.

Optionally, the magnet assembly includes at least two magnets, two of them the magnet is followed the extending direction of through-hole locates in proper order the pore wall of through-hole, two the direction of magnetizing of magnet all with the vibration direction of balancing weight is the same, and two the polarity of magnet sets up the opposite direction.

Optionally, the number of the magnets is four, any two of the magnets are in one group, two groups of magnets are distributed along the extending direction of the through hole, and two magnets in the same group are oppositely arranged on the hole wall of the through hole along the vibration direction of the counterweight block; the two magnets in the same group have the same polarity arrangement direction, and the two groups of magnets have opposite polarity arrangement directions.

Optionally, the magnet assembly includes at least one magnet, the magnet is disposed on a hole wall of the through hole, and a magnetizing direction of the magnet is perpendicular to a vibration direction of the weight block.

Optionally, the number of the magnets is two, the two magnets are oppositely arranged on the hole wall of the through hole along the vibration direction of the balancing weight, and the polarity arrangement directions of the two magnets are opposite.

Optionally, the vibrator assembly further includes two elastic supporting members, the two elastic supporting members are respectively disposed on two sides of the weight block along the vibration direction of the weight block, and two sides of each elastic supporting member are respectively connected to the inner wall of the housing and the weight block.

Optionally, the vibrator assembly further includes two first stoppers and two second stoppers, and two sides of the elastic supporting member are welded to the inner wall of the housing and the weight block through the first stopper and the second stopper, respectively.

Optionally, the stator assembly further includes a magnetically permeable iron core structure, and the coil is sleeved outside the magnetically permeable iron core structure.

The magnetic conduction iron core structure includes first magnetic conduction iron core, second magnetic conduction iron core and third magnetic conduction iron core, first magnetic conduction iron core second magnetic conduction iron core reaches third magnetic conduction iron core is along the perpendicular to the direction of the vibration direction of balancing weight distributes in proper order, and interconnect, the coil cover is located the outside of second magnetic conduction iron core.

Stator module still includes the circuit board, the circuit board is fixed in the inner wall of casing, third magnetic conduction iron core is fixed in the circuit board, coil electric connection in the circuit board.

The utility model also provides an electronic equipment, electronic equipment includes linear vibration motor, linear vibration motor includes casing, vibrator subassembly and is fixed in the stator module of casing, the vibrator subassembly includes: the balancing weight is arranged in the shell in a vibrating manner, a through hole is formed in the balancing weight along the direction perpendicular to the vibrating direction of the balancing weight, the stator assembly comprises a coil, the coil is arranged in the through hole in a penetrating manner, and the axial direction of the coil is perpendicular to the vibrating direction of the balancing weight; and the magnet assembly is arranged on the hole wall of the through hole, and the direction of acting force applied to the magnet assembly when the coil is electrified is the same as the vibration direction of the balancing weight.

The technical scheme of the utility model, linear vibrating motor includes the casing, vibrator subassembly and be fixed in the stator module of casing, vibrator subassembly includes balancing weight and magnet subassembly, the casing can be located vibrationally to the balancing weight, the balancing weight is equipped with the through hole along its vibration direction of perpendicular to, stator module includes the coil, the through hole is worn to locate by the coil, and the axial direction of coil is perpendicular with the vibration direction of balancing weight, the pore wall of through hole is located to the magnet subassembly, and the effort direction that magnet subassembly received when the coil circular telegram is the same with the vibration direction of balancing weight. The magnet assembly is additionally arranged in the vibrator assembly, when the linear vibration motor works, a coil of the stator assembly is electrified to generate a magnetic field and generate ampere force, the vibrator assembly vibrates under the action of the ampere force generated by the stator assembly, meanwhile, the magnet assembly can interact with the stator assembly under the magnetic field of the stator assembly, the direction of the acting force is the same as the vibration direction of the vibrator assembly, the effective utilization rate of the magnetic field of the stator assembly can be improved, the driving force is large, the vibration response is fast, and the linear vibration motor obtains better vibration performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is an exploded view of a linear vibration motor according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a linear vibration motor in the X direction;

FIG. 3 is a schematic cross-sectional view of a linear vibration motor in the Z-direction;

FIG. 4 is a cross-sectional view of the linear vibration motor in the Y-direction;

FIG. 5 is a schematic view of the linear vibration motor from a perspective shown with the housing removed;

FIG. 6 is a schematic view of the linear vibration motor from another perspective with the housing removed;

FIG. 7 is a schematic cross-sectional view of the vibrator assembly in the linear vibration motor in the X direction;

FIG. 8 is a cross-sectional view of the vibrator assembly in the Z-direction of the linear vibration motor;

fig. 9 is a cross-sectional view schematically illustrating a stator assembly in the X direction in the linear vibration motor;

fig. 10 is a cross-sectional view of a stator assembly in a linear vibration motor in a Z-direction.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Linear vibration motor	25	Second stop block
10	Shell body	30	Stator assembly
				11	Base plate	31	Magnetic conductive iron core structure
13	Housing shell	311	First magnetic conductive iron core
				20	Vibrator assembly	3111	First plug hole
21	Balancing weight	312	Second magnetic conductive iron core
				211	Through hole	313	Third magnetic conductive iron core
22	Magnet assembly	3131	Second plug hole
				221	Magnet	32	Coil
23	Elastic support	33	Circuit board
				24	First stop block

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The utility model provides a linear vibration motor 100, linear vibration motor 100 are one kind and utilize the electromagnetic force principle to turn into mechanical vibration's part with the electric energy.

Referring to fig. 1 to 4, the X direction is the left-right direction, the Y direction is the front-back direction, and the Z direction is the up-down direction, and the following embodiments will be described with reference to these directions.

In an embodiment of the present invention, the linear vibration motor 100 includes a housing 10, a vibrator assembly 20, and a stator assembly 30 fixed to the housing 10, wherein the vibrator assembly 20 includes: the counterweight 21, the counterweight 21 can be set in the body 10 vibrationally, the counterweight 21 has through holes 211 along the direction perpendicular to its vibration, the stator assembly 30 includes the coil 32, the coil 32 is set in through hole 211, and the axial direction of the coil 32 is perpendicular to vibration direction of the counterweight 21; and a magnet assembly 22, wherein the magnet assembly 22 is arranged on the hole wall of the through hole 211, and the acting force direction of the magnet assembly 22 when the coil 32 is electrified is the same as the vibration direction of the balancing weight 21.

Specifically, a receiving cavity is formed inside the housing 10, the vibrator assembly 20 and the stator assembly 30 are both located in the receiving cavity, and the stator assembly 30 is fixed to an inner wall of the housing 10. The vibrator assembly 20 comprises a balancing weight 21 and a magnet assembly 22, the vibration direction of the vibrator assembly 20 is the X direction, namely the vibration direction of the balancing weight 21 is the X direction, the balancing weight 21 is arranged at the central position of the accommodating cavity, a certain safety gap is reserved between the upper part and the lower part, a through hole 211 is formed in the middle of the balancing weight 21, the through hole 211 penetrates through the upper surface and the lower surface of the balancing weight 21 along the Z direction (the upper direction and the lower direction), and the shape of the through hole 211 can be a square hole so as to facilitate the assembly operation of the magnet assembly 22. The magnet assembly 22 is fixed on the wall of the through hole 211 by gluing, which is simple to operate and stable. During assembly, the stator assembly 30 penetrates through the through hole 211 along the Z direction (up-down direction) and is located inside the magnet assembly 22, and the stator assembly 30 includes an iron core structure and a coil 32 sleeved on the iron core structure. When the linear vibration motor 100 works, the coil 32 of the stator assembly 30 generates a magnetic field after being electrified, the iron core structure generates an ampere force in the left-right direction (X direction) under the action of the magnetic field, the vibrator assembly 20 can vibrate in the left-right direction (X direction) under the action of the ampere force, the vibrator assembly 20 can vibrate back and forth in the left-right direction (X direction) by changing the electrifying current direction of the stator assembly 30, meanwhile, the magnet assembly 22 can interact with the stator assembly 30 under the magnetic field of the stator assembly 30, the acting force direction is the same as the vibration direction of the vibrator assembly 20, so that the effective utilization rate of the magnetic field of the stator assembly 30 can be improved, the driving force is larger, the vibration response is faster, and the linear vibration motor 100 obtains better vibration performance.

It should be noted that the counterweight 21 is a core component of the linear motor, and the counterweight 21 of the conventional motor has many features, a complex structure, and is mostly processed by Metal Injection Molding (MIM), which results in a high processing cost. The utility model discloses balancing weight 21 surface is comparatively level and smooth, can adopt the die-casting shaping, is showing to have reduced its cost of manufacture.

Therefore, it can be understood that, the technical scheme of the utility model, linear vibration motor 100 includes casing 10, vibrator subassembly 20 and be fixed in casing 10's stator module 30, vibrator subassembly 20 includes balancing weight 21 and magnet subassembly 22, balancing weight 21 is vibrationally located in casing 10, balancing weight 21 is equipped with through hole 211 along its vibration direction of perpendicular to, stator module 30 includes coil 32, coil 32 wears to locate in through hole 211, and coil 32's axial direction is perpendicular with balancing weight 21's vibration direction, magnet subassembly 22 locates the pore wall of through hole 211, and the effort direction that magnet subassembly 22 received when stator module 30 circular telegram is the same with balancing weight 21's vibration direction. Here, the magnet assembly 22 is additionally arranged in the vibrator assembly 20, when the linear vibration motor 100 works, the coil 32 of the stator assembly 30 is electrified to generate a magnetic field and generate an ampere force, the vibrator assembly 20 vibrates under the action of the ampere force generated by the stator assembly 30, meanwhile, the magnet assembly 22 interacts with the stator assembly 30 under the magnetic field of the stator assembly 30, and the direction of the acting force is the same as the vibration direction of the vibrator assembly 20, so that the effective utilization rate of the magnetic field of the stator assembly 30 can be improved, the driving force is large, the vibration response is fast, and the linear vibration motor 100 obtains better vibration performance.

The utility model discloses can realize that magnet assembly 22 receives stator module 30's effort direction and balancing weight 21's vibration direction the same with the direction of magnetizing through the setting mode of design magnet assembly 22.

In an embodiment of the present invention, the magnet assembly 22 includes at least two magnets 221, wherein the two magnets 221 are sequentially disposed on the hole wall of the through hole 211 along the extending direction of the through hole 211, the magnetizing directions of the two magnets 221 are the same as the vibration direction of the weight block 21, and the polarities of the two magnets 221 are opposite to each other.

Specifically, when the magnet assembly 22 includes two magnets 221, the two magnets 221 are sequentially disposed on the same hole wall of the through hole 211 along the up-down direction (Z direction), and the magnetizing directions of the two magnets 221 are both the left-right direction (X direction), which is the vibration direction of the weight block 21. The polarity arrangement directions of the two magnets 221 are opposite, for example, the polarity arrangement direction of the upper magnet 221 is left N right S, and the polarity arrangement direction of the lower magnet 221 is left S right N; alternatively, the upper magnet 221 has a polarity set in the left-to-right direction S and the lower magnet 221 has a polarity set in the left-to-right direction N.

It can be understood that, when the linear vibration motor 100 works, the coil of the stator module 30 generates a magnetic field after passing through the current in a certain direction, and generates an ampere force in the right direction (X positive direction), the counterweight 21 vibrates in the right direction (X positive direction) under the action of the ampere force, meanwhile, because the polarities of the upper and lower magnets 221 are opposite in direction, the direction of the acting force received under the magnetic field of the stator module 30 is the right direction (X positive direction), the direction is the same as the vibration direction of the counterweight 21, so that the magnetic field effective utilization rate of the stator module 30 can be effectively improved, and better vibration performance can be obtained. On the contrary, the direction of the current flowing through the stator assembly 30 is changed, the stator assembly 30 generates an ampere force in the left direction (X negative direction), the counterweight 21 vibrates in the left direction (X left direction) under the action of the ampere force, and meanwhile, because the polarities of the upper magnet 221 and the lower magnet 221 are opposite in direction, the direction of the acting force applied to the magnetic field of the stator assembly 30 is the left direction (X negative direction), and the direction is the same as the vibration direction of the counterweight 21, so that the effective utilization rate of the magnetic field of the stator assembly 30 can be effectively improved, and better vibration performance can be obtained. Thus, the counterweight 21 can vibrate reciprocally in the left-right direction (X direction) by changing the direction of the current flowing through the stator assembly 30, and the direction of the acting force generated by the magnet 221 and the stator assembly 30 is kept the same as the vibration direction of the counterweight 21 during the reciprocal vibration, so as to obtain better vibration performance in real time.

Of course, in some other embodiments, the number of the magnets 221 may be more than two, and the arrangement and the magnetizing direction of the other magnets 221 are not limited herein, as long as the direction of the acting force generated by the magnets 221 and the stator assembly 30 is the same as the vibration direction thereof, which is within the protection scope of the present invention.

Referring to fig. 2 and 7, in an embodiment of the present invention, four magnets 221 are provided, wherein any two magnets 221 are in one group, two groups of magnets 221 are distributed along the extending direction of the through hole 211, and two magnets 221 located in the same group are oppositely disposed on the hole wall of the through hole 211 along the vibration direction of the counterweight 21; the two magnets 221 in the same group have the same polarity, and the two groups of magnets 221 have opposite polarities.

Specifically, the four magnets 221 are respectively an upper left magnet 221, an upper right magnet 221, a lower left magnet 221 and a lower right magnet 221, wherein the upper left magnet 221 and the upper right magnet 221 are a set of magnets 221, the lower left magnet 221 and the lower right magnet 221 are a set of magnets 221, the two sets of magnets 221 are distributed vertically, the upper left magnet 221 and the upper right magnet 221 are oppositely disposed on the left and right side walls of the through hole 211, and the lower left magnet 221 and the lower right magnet 221 are oppositely disposed on the left and right side walls of the through hole 211. The polarity arrangement directions of the upper left magnet 221 and the upper right magnet 221 are the same, the polarity arrangement directions of the lower left magnet 221 and the lower right magnet 221 are the same, and the polarity arrangement directions of the upper left magnet 221 and the lower left magnet 221 are opposite, for example, the polarity arrangement directions of the upper left magnet 221 and the upper right magnet 221 are left S and right N, and the polarity arrangement directions of the lower left magnet 221 and the lower right magnet 221 are left N and right S; alternatively, the polarity arrangement directions of the upper left magnet 221 and the upper right magnet 221 are both left N and right S, and the polarity arrangement directions of the lower left magnet 221 and the lower right magnet 221 are both left S and right N. With such an arrangement, when the linear vibration motor 100 works, the direction of the acting force applied to the left upper and lower magnets 221 in the magnetic field of the stator assembly 30 and the direction of the acting force applied to the right upper and lower magnets 221 are the same as the vibration direction of the counterweight 21, so that the magnetic field effective utilization rate of the stator assembly 30 can be further effectively improved, and better vibration performance can be obtained.

In an embodiment of the present invention, the magnet assembly 22 includes at least one magnet 221, the magnet 221 is disposed on the hole wall of the through hole 211, and the magnetizing direction of the magnet 221 is perpendicular to the vibration direction of the weight block 21.

In this embodiment, when the magnet assembly 22 includes one magnet 221, the magnet 221 is fixed to one sidewall of the through hole 211 by an adhesive, and the magnetization direction of the magnet 221 is the vertical direction, i.e., perpendicular to the vibration direction of the weight 21. The polarity arrangement direction of the magnet 221 is not limited here, and may be up to N and down to S, or up to S and down to N. When the linear vibration motor 100 works, since the magnetizing direction of the magnet 221 is the up-down direction, the direction of the interaction force applied by the magnet 221 under the magnetic field of the stator assembly 30 is the left-right direction, i.e. the vibration direction of the counterweight 21, so that the effective utilization rate of the magnetic field of the stator assembly 30 can be effectively improved, and a better vibration performance can be obtained.

Of course, in other embodiments, the number of the magnets 221 may be two or more, and the arrangement and magnetizing directions of the other magnets 221 are not limited herein, as long as the directions of the acting forces generated by the magnets 221 and the stator assembly 30 are the same as the vibration direction thereof, which is within the protection scope of the present invention.

In an alternative embodiment, two magnets 221 are provided, the two magnets 221 are oppositely disposed on the hole wall of the through hole 211 along the vibration direction of the counterweight 21, and the polarities of the two magnets 221 are opposite.

In this embodiment, the two magnets 221 are a left magnet 221 and a right magnet 221, respectively, the left magnet 221 and the right magnet 221 are oppositely disposed on the left and right walls of the through hole 211 along the left-right direction (X direction), and the polarity disposition directions of the two magnets 221 are opposite, for example, the polarity disposition direction of the left magnet 221 is up N down S, and the polarity disposition direction of the right magnet 221 is up S down N; alternatively, the polarity of the left magnet 221 is set to up S down N, and the polarity of the right magnet 221 is set to up N down S. With such an arrangement, when the linear vibration motor 100 works, the direction of the acting force applied to the left magnet 221 in the magnetic field of the stator assembly 30 and the direction of the acting force applied to the right magnet 221 are both the same as the vibration direction of the counterweight 21, so that the magnetic field effective utilization rate of the stator assembly 30 can be further effectively improved, and better vibration performance can be obtained.

Referring to fig. 3, 5, 6 and 8, in an embodiment of the present invention, the vibrator assembly 20 further includes two elastic supporting members 23, the two elastic supporting members 23 are distributed on two sides of the weight block 21 along the vibration direction thereof, and two sides of each elastic supporting member 23 are respectively connected to the inner wall of the housing 10 and the weight block 21.

Here, the left and right sides of the weight member 21 are connected to the inner wall of the housing 10 through two elastic supporting members 23, and the elastic supporting members 23 can limit the weight member 21 and provide elastic restoring force for the vibration of the weight member 21. It should be noted that the elastic supporting member 23 has a substantially V-shaped structure, and has a better elastic recovery rate.

Further, the vibrator assembly 20 further includes two first stoppers 24 and two second stoppers 25, and two sides of an elastic supporting member 23 are welded to the inner wall of the housing 10 and the weight block 21 through the first stoppers 24 and the second stoppers 25, respectively.

Here elastic support member 23 carries out spot welding through first dog 24 and casing 10 inner wall and is connected, carries out electric welding through second dog 25 and balancing weight 21 and is connected, so can effectively guarantee elastic support member 23 and casing 10 inner wall and balancing weight 21's firm in connection to guarantee whole vibrator subassembly 20 set up stability and reliability, and then guarantee vibrator subassembly 20 vibration process's reliability and stability.

Referring to fig. 2, fig. 3, fig. 6 and fig. 10, in an embodiment of the present invention, the stator assembly 30 further includes a magnetic conductive iron core structure 31, and the coil 32 is sleeved on an outer side of the magnetic conductive iron core structure 31.

When the linear vibration motor 100 works, the coil 32 is electrified and generates a magnetic field, the magnetic conduction iron core structure 31 generates an ampere force under the action of the magnetic field, the counterweight 21 vibrates under the action of the ampere force, meanwhile, the magnet assembly 22 receives an interaction force under the magnetic field of the coil 32, the direction of the interaction force is the same as the vibration direction of the counterweight 21, so that the magnetic field effective utilization rate of the stator assembly 30 can be effectively improved, and the linear vibration motor 100 obtains better vibration performance.

Referring to fig. 2, 4 and 9, in an alternative embodiment, the magnetic conductive core structure 31 includes a first magnetic conductive core 311, a second magnetic conductive core 312 and a third magnetic conductive core 313, the first magnetic conductive core 311, the second magnetic conductive core 312 and the third magnetic conductive core 313 are sequentially distributed along a direction perpendicular to the vibration direction of the counterweight 21 and are connected to each other, and the coil 32 is sleeved outside the second magnetic conductive core 312.

Specifically, the first magnetic core 311 and the third magnetic core 313 are both block-shaped, the second magnetic core 312 is cylindrical, a first inserting hole 3111 is formed in a surface of the first magnetic core 311, the first inserting hole 3111 can penetrate through two surfaces of the first magnetic core 311 along the up-down direction (Z direction), and the size of the first inserting hole 3111 is matched with that of the second magnetic core 312, a second inserting hole 3131 is formed in a surface of the third magnetic core 313, the second inserting hole 3131 can penetrate through two surfaces of the third magnetic core 313 along the up-down direction (Z direction), and the size of the second magnetic core 312 is also matched with that of the second magnetic core 312. The coil 32 is sleeved outside the second magnetically conductive core 312, and the first magnetically conductive core 311 and the third magnetically conductive core 313 at two ends of the second magnetically conductive core 312 perform a magnetic conductive function, so that the i-shaped magnetically conductive core structure 31 receives a larger magnetic force under the magnetic field generated by the coil 32, and thus the linear vibration motor 100 can obtain a better vibration performance. In addition, the iron core material has self damping, and no damping structural member is required to be additionally arranged, so that the number of assembly parts of the product can be reduced, the assembly process of the linear vibration motor 100 is simplified, and the product cost is reduced.

It should be noted that, the coil 32 is located at the central position of the magnetic circuit system, and after assembly, certain safety gaps exist between the coil 32 and the first magnetically permeable core 311, the second magnetically permeable core 312, and the third magnetically permeable core 313.

Further, the stator assembly 30 further includes a circuit board 33, the circuit board 33 is fixed on the inner wall of the casing 10, the third magnetically permeable iron core 313 is fixed on the circuit board 33, and the coil 32 is electrically connected to the circuit board.

Here, the circuit board 33 may be a flexible circuit board to facilitate the assembling operation, the circuit board 33 is fixed to the inner wall of the casing 10 by an adhesive, a screw, a snap, or other reasonable and effective fixing method, and the third magnetic conductive iron core 313 is fixed to the surface of the circuit board 33 opposite to the inner wall of the casing 10 by an adhesive, so that the mounting and fixing operation of the stator assembly 30 can be achieved. After assembly, the coil 32 is electrically connected to the circuit board 33, the circuit board 33 at least partially penetrates through the housing 10 and is exposed outside the housing 10, and the exposed portion of the circuit board 33 is used for electrically communicating with an external circuit.

Referring to fig. 1 and 2 again, the housing 10 is a split structure, and includes a bottom plate 11 and a cover 13 covering the bottom plate 11, and the bottom plate 11 and the cover 13 are assembled to form an accommodating cavity. When assembling, the circuit board 33 is fixed on the bottom plate 11, and the elastic supporting member 23 is fixed on the inner wall of the housing 13 by welding through the first stopper 24.

The present invention also provides an electronic device including the linear vibration motor 100 as described above, wherein the specific structure of the linear vibration motor 100 is as described above with reference to the foregoing embodiments. Since the electronic device adopts all technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.

Here, the electronic device may be selected from a mobile phone, a tablet computer, a smart wearable device, a game machine, a multimedia entertainment device, and the like, and the linear vibration motor 100 is installed in the electronic device as an actuator of tactile feedback, such as vibration feedback of clicking a touch screen. The linear vibration motor 100 is a component that converts electric energy into mechanical vibration using the principle of electromagnetic force, and the linear vibration motor 100 is generally mounted on an edge portion of an electronic device and generates vibration in a direction perpendicular to an object receiving the vibration.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A linear vibration motor comprising a housing, a vibrator assembly, and a stator assembly fixed to the housing, wherein the vibrator assembly comprises:

the balancing weight is arranged in the shell in a vibrating manner, a through hole is formed in the balancing weight along the direction perpendicular to the vibrating direction of the balancing weight, the stator assembly comprises a coil, the coil is arranged in the through hole in a penetrating manner, and the axial direction of the coil is perpendicular to the vibrating direction of the balancing weight; and

and the magnet assembly is arranged on the hole wall of the through hole, and the direction of acting force applied to the magnet assembly when the coil is electrified is the same as the vibration direction of the balancing weight.

2. The linear vibration motor of claim 1, wherein the magnet assembly includes at least two magnets, two of the magnets are sequentially disposed on the wall of the through hole along the extending direction of the through hole, the magnetizing directions of the two magnets are the same as the vibration direction of the weight block, and the polarities of the two magnets are opposite.

3. The linear vibration motor according to claim 2, wherein the number of the magnets is four, any two of the magnets are in one group, two groups of magnets are distributed along the extending direction of the through hole, and two magnets in the same group are oppositely arranged on the hole wall of the through hole along the vibration direction of the weight block;

the two magnets in the same group have the same polarity arrangement direction, and the two groups of magnets have opposite polarity arrangement directions.

4. The linear vibration motor of claim 1, wherein the magnet assembly includes at least one magnet, the magnet is disposed on a wall of the through hole, and a magnetizing direction of the magnet is perpendicular to a vibration direction of the weight.

5. The linear vibration motor according to claim 4, wherein two magnets are provided, two of the magnets are provided on the wall of the through hole in a direction opposite to the vibration direction of the weight member, and the polarities of the two magnets are provided in opposite directions.

6. The linear vibration motor of claim 1, wherein the vibrator assembly further comprises two elastic supporting members, the two elastic supporting members are disposed at both sides of the weight block along the vibration direction thereof, and both sides of each of the elastic supporting members are connected to the inner wall of the housing and the weight block, respectively.

7. A linear vibration motor according to claim 6, wherein said vibrator assembly further comprises two first stoppers and two second stoppers, and both sides of a said elastic supporting member are welded to the inner wall of said housing and said weight block through a said first stopper and a said second stopper, respectively.

8. The linear vibration motor according to any one of claims 1 to 7, wherein the stator assembly further includes a magnetically permeable core structure, and the coil is sleeved outside the magnetically permeable core structure.

9. The linear vibration motor of claim 8, wherein the magnetically conductive core structure includes a first magnetically conductive core, a second magnetically conductive core, and a third magnetically conductive core, the first magnetically conductive core, the second magnetically conductive core, and the third magnetically conductive core are sequentially distributed along a direction perpendicular to a vibration direction of the weight block and are connected to each other, and the coil is sleeved outside the second magnetically conductive core.

10. The linear vibration motor of claim 9, wherein said stator assembly further comprises a circuit board, said circuit board is fixed to an inner wall of said housing, said third magnetically permeable core is fixed to said circuit board, and said coil is electrically connected to said circuit board.

11. An electronic device characterized in that the electronic device comprises the linear vibration motor according to any one of claims 1 to 10.