CN215580856U - Linear vibration motor - Google Patents
Linear vibration motor Download PDFInfo
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- CN215580856U CN215580856U CN202121436801.4U CN202121436801U CN215580856U CN 215580856 U CN215580856 U CN 215580856U CN 202121436801 U CN202121436801 U CN 202121436801U CN 215580856 U CN215580856 U CN 215580856U
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/12—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moving in alternate directions by alternate energisation of two coil systems
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- Power Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
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Abstract
The embodiment of the utility model discloses a linear vibration motor, which comprises a shell, a vibration assembly, a stator assembly and an elastic supporting piece, wherein the vibration assembly, the stator assembly and the elastic supporting piece are accommodated in the shell; the vibration assembly includes: the two mass blocks are arranged along the vibration direction of the vibration assembly, and the two groups of magnetic circuit structures are arranged along the axial direction of the coil; the vibration assembly comprises a vibration cavity, and the coil is positioned in the vibration cavity; the magnetic circuit structure includes: a magnetic group; the magnetic conduction plate is combined and fixed on one side of the magnetic group, which is far away from the coil; the magnetic group is clamped and fixed between the two mass blocks. The utility model can effectively improve the magnetic field intensity of the magnetic circuit structure, thereby improving the driving force of the motor structure and providing more possibilities for selecting a linear vibration motor with larger vibration sense in a limited space for market products.
Description
Technical Field
The utility model belongs to the technical field of electronic products. And more particularly, to a linear vibration motor.
Background
With the development of electronic technology, portable consumer electronic products, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices, are increasingly popular with people, and these electronic products generally use a vibration motor for system feedback, such as incoming call prompt, information prompt, navigation prompt, vibration feedback of game consoles, and the like.
The linear vibration motor technology is also developing towards small volume, large vibration inductance, fast response, low power consumption and low magnetic leakage, but the existing motor structure is difficult to combine all the advantages. The driving force is a main parameter of the linear vibration motor, and achieving a larger driving in a limited space may bring higher competitiveness to a product.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present invention provides a linear vibration motor to improve a driving force of the linear vibration motor.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a linear vibration motor comprises a shell, a vibration component, a stator component and an elastic supporting piece, wherein the vibration component, the stator component and the elastic supporting piece are accommodated in the shell;
the vibration assembly includes:
two masses arranged in the direction of vibration of the vibration assembly, an
Two groups of magnetic circuit structures arranged along the axial direction of the coil;
the vibration assembly comprises a vibration cavity, and the coil is positioned in the vibration cavity;
the magnetic circuit structure includes:
a magnetic group; and
the magnetic conducting plate is combined and fixed on one side of the magnetic group, which is far away from the coil;
the magnetic group is clamped and fixed between the two mass blocks.
Furthermore, it is preferable that the magnetic conductive plate covers at least a surface of the side of the magnetic group facing away from the coil; the two magnetic conduction plates are arranged in central symmetry.
In addition, preferably, a cavity formed by enclosing the two masses and the two sets of magnetic circuit structures together is the vibration cavity.
Furthermore, it is preferable that the magnetic conductive plate includes:
the straight part is flatly attached to the surface of one side, away from the coil, of the magnetic group;
a bent portion bent and extended from one end portion of the straight portion toward the coil direction, and
the extension part extends from one end of the bending part far away from the straight part along the outer wall surface of the mass block.
In addition, preferably, the outer side wall surface of the mass block comprises a groove for accommodating the bending part and the extending part.
In addition, preferably, the elastic support comprises a first fixing part fixedly combined with the housing, a second fixing part fixedly combined with the vibration component, and an elastic part connecting the first fixing part and the second fixing part;
the second fixing part is fixedly combined on the extension part.
In addition, it is preferable that the stator assembly includes two coils arranged along a vibration direction of the vibration assembly; the energizing directions of the two coils are opposite.
In addition, it is preferable that the magnetic group includes a center magnet and two side magnets disposed at both ends of the center magnet in the vibration direction; the magnetizing directions of the central magnet and the side magnets are opposite, and the magnetizing directions of the two side magnets are the same;
the magnetizing directions of the two magnetic groups are the same.
In addition, it is preferable that a projection of a joint of the central magnet and the side magnet on the coil lumen is located within a width range defined by the coil lumen.
In addition, preferably, the coil inner cavity comprises a core; the projection of the combination part of the central magnet and the side magnets on the inner cavity of the coil is positioned in the width range limited by the core body.
The beneficial effect of this application is as follows:
to the technical problem that exists among the prior art, the linear vibration motor that this application provided constitutes the vibration chamber jointly through two quality pieces and two sets of magnetic circuit structure, when guaranteeing necessary vibration space between oscillator subassembly and the coil, can effectively increase the structure size of vibration subassembly magnetic unit, improves magnetic field intensity, and then makes linear vibration motor's drive power effectively improve, provides more probably for market product selects the linear vibration motor of bigger sense of shaking in finite space. The present invention has particular advantages over the prior art, and various features will be described in detail in the following detailed description.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows an exploded view of a linear vibration motor provided by the present invention.
Fig. 2 illustrates a sectional view of a linear vibration motor provided by the present invention.
Fig. 3 illustrates another angle sectional view of the linear vibration motor provided by the present invention.
Fig. 4 is a schematic view illustrating an assembly structure of the vibration assembly provided by the present invention.
Detailed Description
In order to more clearly illustrate the utility model, the utility model is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the utility model.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is further noted that, in the description of the present application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In order to overcome the defects in the prior art, an embodiment of the present invention provides a linear vibration motor 100, which is shown in fig. 1-3, and specifically, the linear vibration motor 100 includes a housing 1, a vibration assembly 2 accommodated in the housing, a stator assembly 3, and an elastic support 4 supporting the vibration assembly 2.
The lateral wall 15 includes the long limit 151 that two parallel intervals set up and locates long limit 151 both ends are connected two the two minor faces 153 of long limit 151, long limit 151 with the minor face 153 can adopt integrated into one piece structure, also can adopt split type design and connect fixedly. In this embodiment, the top wall 11 is integrally formed with the side wall 15, and the bottom wall 13 directly covers the side wall 15, so that the linear vibration motor 100 can be easily assembled, and in other embodiments, the side wall 15 may be integrally formed with the bottom wall 13.
With reference to the structure shown in the drawings, in the present embodiment, the stator assembly 3 is fixed in the housing 1, specifically, the stator assembly 3 is fixed on the bottom wall 13, and the stator assembly 2 includes a coil 31 whose axial direction is perpendicular to the vibration direction of the vibration assembly 2 in the horizontal plane. The coil 31 is connected with an external power supply through an FPC board 5, the FPC board is fixed on the bottom wall 13, and one end of the FPC board extends out of the accommodating space to be electrically connected with an external circuit. The vibration component 2 is used for vibration, specifically, the vibration component 2 includes two mass blocks 21 arranged along the vibration direction of the vibration component 2, and two sets of magnetic structures 22 arranged along the axial direction of the coil 31, the two sets of magnetic structures 22 are distributed on two opposite side sides of the coil 31, and the counterweight 21 is suspended in the accommodating space. It will be appreciated that the mass 21 serves to increase the inertia of the vibrating assembly 2 to enhance the vibration sensation. The magnetic structure 22 is used to provide a magnetic field. The coil 31 is located in the magnetic field of the two magnetic structures 22, and the magnetic structures 22 and the coil 31 cooperate with each other to drive the vibration assembly 2 to vibrate.
In order to meet the requirement that the vibration component can vibrate back and forth relative to the stator component, the vibration component 2 comprises a vibration cavity 20, and the coil 31 is accommodated in the vibration cavity 20. As shown in fig. 2 to 4, in the present embodiment, the magnetic structure 22 includes a magnetic group 221 and a magnetic conductive plate 222 combined and fixed on a side of the magnetic group 221 away from the coil 31, the magnetic group 221 is sandwiched between the two masses 21, and two sets of magnetic structures are combined and fixed with the two masses 21 to form the vibration assembly 2. In the traditional motor structure, as the quality piece and the magnetic circuit structure of the vibration assembly, in order to realize the good fixation of the magnetic circuit structure and the quality piece, the quality piece can occupy a certain space in the axial direction of the coil vertical to the vibration direction of the vibration assembly, so that the structural size of the magnetic assembly in the direction is restricted, and the overall comprehensive performance of the motor is influenced. In the motor structure provided by the embodiment, the two magnetic groups are clamped and fixed between the two mass blocks, and the two magnetic groups and the two mass blocks are combined and fixed to form the vibration assembly, so that the size of the magnetic group structure can be increased remarkably in the short side direction of the shell (in the axial direction of the coil in the figure), the size of the magnetic group structure in the direction is not limited by the mass blocks, and the overall magnetic field strength of the magnetic circuit structure can be effectively improved, so that the vibration motor can obtain higher driving force.
In this embodiment, the magnetic conductive plate 222 is made of a magnetic conductive material, and can perform a magnetic conductive function, thereby preventing the magnetic induction lines from scattering, increasing the magnetic flux of the coil, strengthening the lorentz force, and effectively increasing the vibration force and the vibration effect of the vibrator component. In a specific embodiment, the magnetic conducting plate 222 covers at least a surface of the side of the magnetic group 221 facing away from the coil 31 to avoid scattering of magnetic induction lines. In order to improve the bonding strength between the magnetic group 221 and the mass block 21 and prolong the service life of the linear vibration motor 100, the magnetic conductive plate 222 covers the outer side surface of the magnetic group 221 and the outer side wall surface of the mass block 21. In this embodiment, referring to fig. 2, in order to ensure that the vibrating assembly stably vibrates in the housing according to a predetermined direction, and avoid polarization, the two magnetic conductive plates 22 are arranged in a central symmetry manner.
In this embodiment, the two mass blocks 21 and the two sets of magnetic structures 22 surround the outside of the coil 31, a cavity formed by the two mass blocks 21 and the two sets of magnetic structures 22 is the vibration cavity 20, and the magnetic conductive plate 222 covers the outer side surface of the magnetic group 221 and the outer side wall surface of the mass block 21, so that the magnetic induction lines are not scattered, a more efficient magnetic gathering effect is achieved, the effective utilization of the magnetic induction lines is realized, and a larger drive is realized in a limited space. And the design also increases the combination area between the magnetic structure 22 and the mass block 21, enhances the combination strength and prolongs the service life.
In a specific example, the magnetic conductive plate 222 includes a straight portion 2221 flatly attached to a side surface of the magnetic group 221 facing away from the coil 31, a bent portion 2222 bent and extended from an end of the straight portion 2221 toward the coil 31, and an extending portion 2223 extended from an end of the bent portion 2222 facing away from the straight portion 2221 along an outer side wall surface of the mass 21. Wherein the straight portion 2221 includes a portion corresponding to an outer side wall surface of the mass block 21.
In the present embodiment, the outer side wall surface of the mass 21 includes a groove 210 for accommodating the bending portion 2222 and the extending portion 2223, it can be understood that the groove 210 corresponds to the extending portion 2223 and the bending portion 2222, and the groove 210 is formed by inwardly recessing the outer side wall surface at the long axis side of the mass 21. As shown in fig. 2, the provision of the groove 21 can reduce the increase in the size of the vibration assembly 2 in the vertical vibration direction, and can reduce the structural size, thereby reducing the overall volume of the linear vibration motor 100 and satisfying the requirement for miniaturization.
In this embodiment, the number of the elastic supporting members 4 is two, and the two elastic supporting members are disposed on two sides of the vibration assembly 2 along the vibration direction. The elastic support piece 4 is a U-shaped spring, and the opening directions of the two elastic support pieces 4 are opposite. The elastic supporting member 4 includes a first fixing portion 41 coupled and fixed to the housing 1, a second fixing portion 42 coupled and fixed to the vibration module 2, and an elastic portion 43 connecting the first fixing portion 41 and the second fixing portion 42. Specifically, the second fixing portion 42 and the first fixing portion 41 are disposed at an interval along the short axis of the mass 21, and the second fixing portion 42 is fixed on the extending portion 2223.
The first fixing portion 41 and the casing 1 and the second fixing portion 42 and the magnetic conduction plate 222 are both fixed by the combination of the blocking pieces 6, the blocking pieces 6 not only can increase the combination area and enhance the combination force of the elastic support member 4, but also can prevent the elastic support member 4 from being broken due to the transition bending.
In a specific example, the stator assembly 3 includes two coils 31 arranged along the vibration direction of the vibration assembly 2, and the current directions of the two coils 31 are opposite. In the present embodiment, the core 32 is included in the inner cavity of the coil 31, and the height of the core 32 perpendicular to the vibration direction should be smaller than the height of the coil 31 perpendicular to the vibration direction, so that the static attraction force in the vibration direction is reduced. Alternatively, the core 32 is made of iron-silicon alloy and has a cylindrical shape, and the coil 31 is sleeved on the outer circumference of the core 32. When the coil is installed, the coil 31 is sleeved from one end of the core body 32, so that the assembly and the disassembly are convenient.
With reference to fig. 2 and 3, in the present technical solution, after the coil 31 is powered on, the coil 31 and the core 32 cooperate to form an electromagnet structure, the coil 31 generates a magnetic field to magnetize the core 32, and the magnetic field generated after the core 32 is magnetized and the magnetic field of the coil 31 are mutually superimposed, so that the magnetism of the coil 31 is greatly increased.
Further, when the current directions of the two coils 31 are opposite, the directions of the generated magnetic fields are also opposite. The magnetic fields generated by the two coils 31 are mutually superposed, so that the electromagnetic force is enhanced, and meanwhile, the magnetic fields act on the vibration component 2, so that the driving force can be increased, and the vibration effect of the vibration component 2 is improved.
In this embodiment, the magnetic groups 221 are magnetized in a direction perpendicular to the vibration direction of the vibration assembly 2, and the magnetizing directions of the two magnetic groups 221 are the same. Specifically, the magnetic group 221 includes a center magnet 2211 and two side magnets 2212 disposed at both ends of the center magnet 2211 in the vibration direction. Referring to fig. 4, the center magnet 2211 and the side magnets 2212 have opposite magnetizing directions, and the two side magnets 2212 have the same magnetizing direction.
In order to increase the effective area of the magnetic induction line passing through the coil 31 and thus improve the utilization rate of the coil, the projection of the joint of the central magnet 2211 and the side magnets 2212 on the inner cavity of the coil 31 is located within the limited width range of the inner cavity of the coil 31. In one embodiment, when the coil includes a core inside, the projection of the joint of the center magnet 2211 and the side magnets 2212 on the inner cavity of the coil 31 is located within the width defined by the core 32.
In a specific embodiment, linear vibration motor 100 is including two stopper 7, two stopper 7 is half to be located the both ends outside of vibrating assembly 2 vibration direction, and the combination is fixed in on the casing 1, in this embodiment, two stopper 7 corresponds the both minor axis avris setting of quality piece 21 for the restriction vibrating assembly 2's displacement volume protects vibrating assembly 2, avoids it because of the too big and casing 1 bumps.
In one embodiment, the casing 1 is made of a material having magnetic conductivity, and a closed magnetic conductive casing is adopted, so that magnetic leakage of the motor structure can be reduced, and the magnetic field utilization rate and the driving force of the magnetic assembly structure can be improved.
In general, when the magnetic circuit structure is used as a vibrator assembly, the magnetic assembly is mostly combined and fixed in a vibration cavity formed by the mass block, in order to ensure a necessary vibration space between the vibrator assembly and the coil, the structural size of the magnetic assembly is limited to a certain extent, and in order to avoid the outward scattering of magnetic induction lines, the lorentz force is enhanced, the magnitude of the vibration force of the vibrator assembly is effectively increased, and the vibration effect is effectively increased, the magnetic conduction plate needs to be arranged between the magnetic assembly and the wall of the vibration cavity, so that the structural size of the magnetic assembly is further limited, and the magnitude of the vibration force of the vibrator assembly is influenced. In the embodiment provided by the utility model, the two mass blocks and the two groups of magnetic circuit structures jointly form the vibration cavity, so that the structural size of the magnetic group is not limited, the magnetic induction strength is stronger, and the driving force of the linear vibration motor is effectively improved. In practical application, a plurality of magnets can be combined and fixed through the magnetic conduction plates to form a magnetic group structure, and then the magnetic group structure is assembled with the mass block, so that the assembly is convenient, and meanwhile, the combination fixing strength between each magnet and the mass block can be increased, and the connection quality is improved.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. A linear vibration motor comprises a shell, a vibration component, a stator component and an elastic supporting piece, wherein the vibration component, the stator component and the elastic supporting piece are accommodated in the shell;
the vibration assembly includes:
two masses arranged in the direction of vibration of the vibration assembly, an
Two groups of magnetic circuit structures arranged along the axial direction of the coil;
the vibration assembly comprises a vibration cavity, and the coil is positioned in the vibration cavity;
the magnetic circuit structure includes:
a magnetic group; and
the magnetic conducting plate is combined and fixed on one side of the magnetic group, which is far away from the coil;
the magnetic group is clamped and fixed between the two mass blocks.
2. The linear vibration motor of claim 1, wherein the magnetic conductive plate covers at least a surface of a side of the magnetic group facing away from the coil; the two magnetic conduction plates are arranged in central symmetry.
3. A linear vibration motor according to claim 1, wherein the cavity defined by the two masses and the two sets of magnetic structures together is the vibration cavity.
4. The linear vibration motor of claim 1, wherein the magnetic conductive plate includes:
the straight part is flatly attached to the surface of one side, away from the coil, of the magnetic group;
a bent portion bent and extended from one end portion of the straight portion toward the coil direction, and
the extension part extends from one end of the bending part far away from the straight part along the outer wall surface of the mass block.
5. The linear vibration motor of claim 4, wherein said mass has a recess on an outer wall surface thereof for receiving said bent portion and said extended portion.
6. The linear vibration motor of claim 4, wherein the elastic supporting member includes a first fixing portion coupled and fixed to the housing, a second fixing portion coupled and fixed to the vibration module, and an elastic portion connecting the first fixing portion and the second fixing portion;
the second fixing part is fixedly combined on the extension part.
7. The linear vibration motor of claim 1, wherein the stator assembly includes two coils arranged in a vibration direction of the vibration assembly; the energizing directions of the two coils are opposite.
8. The linear vibration motor of claim 7, wherein the magnetic group includes a center magnet and two side magnets disposed at both ends of the center magnet in a vibration direction; the magnetizing directions of the central magnet and the side magnets are opposite, and the magnetizing directions of the two side magnets are the same;
the magnetizing directions of the two magnetic groups are the same.
9. The linear vibration motor of claim 8, wherein a projection of a junction of the center magnet and the side magnets on the coil bore is within a width defined by the coil bore.
10. A linear vibration motor as claimed in claim 8, wherein said coil bore includes a core therein; the projection of the combination part of the central magnet and the side magnets on the inner cavity of the coil is positioned in the width range limited by the core body.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121436801.4U CN215580856U (en) | 2021-06-25 | 2021-06-25 | Linear vibration motor |
| PCT/CN2021/129980 WO2022267306A1 (en) | 2021-06-25 | 2021-11-11 | Linear vibrating motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121436801.4U CN215580856U (en) | 2021-06-25 | 2021-06-25 | Linear vibration motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215580856U true CN215580856U (en) | 2022-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121436801.4U Active CN215580856U (en) | 2021-06-25 | 2021-06-25 | Linear vibration motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN215580856U (en) |
| WO (1) | WO2022267306A1 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101583641B1 (en) * | 2014-08-07 | 2016-01-08 | (주)하이소닉 | Haptic actuator |
| JP2019068591A (en) * | 2017-09-29 | 2019-04-25 | 日本電産セイミツ株式会社 | Vibration motor |
| JP2019134510A (en) * | 2018-01-29 | 2019-08-08 | 日本電産セイミツ株式会社 | Vibration motor |
| KR20190092851A (en) * | 2018-01-31 | 2019-08-08 | 자화전자(주) | Horizontal type linear vibration generating device |
| CN211744317U (en) * | 2019-12-26 | 2020-10-23 | 瑞声科技(新加坡)有限公司 | Linear motor |
| CN212381094U (en) * | 2020-06-28 | 2021-01-19 | 瑞声光电科技(常州)有限公司 | Linear vibration motor |
| CN212381093U (en) * | 2020-06-28 | 2021-01-19 | 瑞声光电科技(常州)有限公司 | Linear vibration motor |
| CN213185848U (en) * | 2020-10-23 | 2021-05-11 | 江苏精研科技股份有限公司 | Novel linear vibration motor |
| CN215186389U (en) * | 2021-06-25 | 2021-12-14 | 歌尔股份有限公司 | Linear vibration motor |
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2021
- 2021-06-25 CN CN202121436801.4U patent/CN215580856U/en active Active
- 2021-11-11 WO PCT/CN2021/129980 patent/WO2022267306A1/en active Application Filing
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| WO2022267306A1 (en) | 2022-12-29 |
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