CN105680662B - Linear vibration electric motor - Google Patents
Linear vibration electric motor Download PDFInfo
- Publication number
- CN105680662B CN105680662B CN201610184300.9A CN201610184300A CN105680662B CN 105680662 B CN105680662 B CN 105680662B CN 201610184300 A CN201610184300 A CN 201610184300A CN 105680662 B CN105680662 B CN 105680662B
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- China
- Prior art keywords
- mass block
- lower casing
- optical member
- electric motor
- elastic supporting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
Abstract
The present invention provides a kind of linear vibration electric motor, including the upper casing of adaptation connection and lower casing, be hung in upper casing and lower casing vibrational system, be correspondingly arranged with vibrational system stator, support vibrational system and provide the spring part of elastic restoring force for it；Wherein, vibrational system includes mass block and the permanent magnet for being incorporated into mass block medium position；Lower casing is stamped and formed out by permeability magnetic material, and elastic supporting member for supporting optical member is provided between mass block and lower casing；Wherein, elastic supporting member for supporting optical member is fixed on mass block/lower casing, and when mass block is moved with lower casing/mass block sliding friction.The frequency bandwidth of linear vibration electric motor can be extended using foregoing invention, reduce collision and noise.
Description
Technical field
The present invention relates to consumer electronics fields, more specifically, are related to a kind of applied to portable consumer electronics production
The linear vibration electric motor of product.
Background technology
With the development of the communication technology, portable electronic product, such as mobile phone, handheld device or palm multimedia recreation
Equipment etc. enters people’s lives.In these portable electronic products, generally system feedback can be done with micro-burst motor,
Such as the vibrational feedback etc. of the incoming call prompting of mobile phone, game machine.However, with the continuous development and extensive use of electronic product,
Increasingly higher demands also proposed to the performance and service life of vibrating motor.
Existing vibrating motor generally comprises upper cover and forms the lower cover of oscillation space with upper cover, done in oscillation space
The oscillator (including mass block and permanent magnet) of linear vibration connects upper cover and oscillator is made to do resilient support of reciprocating vibration
Part and stator coil positioned at oscillator following distance.
Currently, the noise and collision problem when vibrating motor (or motor) vibrates often are difficult to avoid that.Lead in the prior art
It is coated in the space between stator and shell frequently with magnetic liquid, oscillator vibration width is reduced using the frictional force of magnetic liquid and shell
Degree, to realize the effect for reducing noise and avoiding collision.
But magnetic liquid easy tos produce splashing in falling process, while the physical property of magnetic liquid is easy by environment temperature
It influences, to influence the stability of vibrating motor performance.
Therefore, it is necessary to a kind of new damping structure be provided, to reduce collision and the noise in vibrating motor vibration processes.
Invention content
In view of the above problems, the object of the present invention is to provide a kind of linear vibration electric motors, are adopted with solving current vibrating motor
The mode of noise is reduced with magnetic liquid, magnetic liquid is not fixed easily, and easy tos produce splashing, influences the problems such as vibrating motor performance is stablized.
There is provided a kind of linear vibration electric motor according to the present invention, including the upper casing of adaptation connection and lower casing, be hung on upper casing and
Vibrational system in lower casing, the stator being correspondingly arranged with vibrational system, support vibrational system simultaneously provide elastic restoring force for it
Spring part；Wherein, vibrational system includes mass block and the permanent magnet of combination and mass block medium position；Lower casing is rushed by permeability magnetic material
Swaging between mass block and lower casing at being provided with elastic supporting member for supporting optical member；Wherein, elastic supporting member for supporting optical member is fixed on mass block/lower casing,
And when mass block is moved with lower casing/mass block sliding friction.
Furthermore it is preferred that scheme be, elastic supporting member for supporting optical member be polyester part, silica gel part or rubber parts.
Furthermore it is preferred that scheme be that elastic supporting member for supporting optical member is strip structure, including fixed part and swiping portion；Wherein, Gu
Determine portion to fix with mass block/lower casing；The cross section in swiping portion is arcuate structure, and when mass block moves, elastic supporting member for supporting optical member passes through
Swiping portion and lower casing/mass block sliding friction.
Furthermore it is preferred that scheme be that the length of elastic supporting member for supporting optical member is no more than mass block in linear vibration electric motor Y direction
Width, the height of elastic supporting member for supporting optical member is equal to the distance between mass block and lower casing.
Furthermore it is preferred that scheme be to be coated with lubricant on the surface in swiping portion.
Furthermore it is preferred that scheme be that elastic supporting member for supporting optical member is symmetricly set on the both sides of stator, also, elastic supporting member for supporting optical member with it is fixed
The setting of son interval.
Furthermore it is preferred that scheme be that, when elastic supporting member for supporting optical member is fixed on mass block, the elasticity of stator and stationary state is propped up
The distance between support member is more than mass block from resting position to the distance of one end motion.
Furthermore it is preferred that scheme be that, when elastic supporting member for supporting optical member is fixed on lower casing, mass block is close to the end of elastic supporting member for supporting optical member
The distance between portion and elastic supporting member for supporting optical member be more than mass block from resting position to one end motion at a distance from.
Furthermore it is preferred that scheme be that being sticked on surface of the mass block far from stator has magnetic conductive board.
Furthermore it is preferred that scheme be that stator includes the stator coil being fixed on lower casing；Vibrational system includes at least one piece
Permanent magnet is provided with groove corresponding with permanent magnet in the medium position of mass block, and permanent magnet is fixed in corresponding groove；
Also, the magnetizing direction of permanent magnet is consistent with the axial direction of stator coil.
It is protected by the attraction between magnetic lower casing and permanent magnet using above-mentioned linear vibration electric motor according to the present invention
The fit-state for demonstrate,proving mass block and elastic supporting member for supporting optical member, in mass block motion process, elastic supporting member for supporting optical member plays the work of flexible damping
With can effectively reduce the noise of linear vibration electric motor；In addition, the lower casing formed using permeability magnetic material, which is also had, dredges magnetic induction line
Effect, increase the vibration sense of linear vibration electric motor.
To the accomplishment of the foregoing and related purposes, one or more aspects of the present invention include be particularly described below and
The feature particularly pointed out in claim.Certain illustrative aspects of the invention is described in detail in the following description and the annexed drawings.
However, these aspects indicate only usable some of the various ways in the principles of the present invention.In addition, of the invention
It is intended to include all such aspects and their equivalent.
Description of the drawings
By reference to the following description in conjunction with the accompanying drawings and the contents of the claims, and with to the present invention more comprehensively
Understand, other objects and results of the present invention will be more clearly understood and understood.In the accompanying drawings：
Fig. 1 is the exploded view according to the linear vibration electric motor of the embodiment of the present invention；
Fig. 2 is the sectional view according to the linear vibration electric motor of the embodiment of the present invention.
Reference numeral therein includes：Upper casing 1, magnetic conductive board 2, permanent magnet 3, mass block 4, spring part 5, stator coil 6, bullet
Property support element 7, lower casing 8.
Identical label indicates similar or corresponding feature or function in all the appended drawings.
Specific implementation mode
In the following description, for purposes of illustration, it in order to provide the comprehensive understanding to one or more embodiments, explains
Many details are stated.It may be evident, however, that these embodiments can also be realized without these specific details.
In other examples, one or more embodiments for ease of description, well known structure and equipment are shown in block form an.
Used " mass block " may also be referred to as " clump weight " in the description of following specific implementation modes, refers both to and produces
The permanent magnetism ferropexy of raw vibration is to reinforce high quality, the high desnity metal block of vibration balancing.In the present invention, mass block can be adopted
It is made of tungsten steel block or the high density-metal material such as nickel steel block or nickel tungsten, to increase vibration force, makes shaking for electronic product
It is dynamic stronger.
In addition, present invention is mainly used for the improvement of vibrating motor, but also it is not excluded for answering the technology in the present invention
For large-scale vibrating motor.For the convenience of statement, in the description of the embodiments below, " linear vibration motor ", " micro-vibration
Meaning all same represented by motor " and " linear vibration electric motor ".
For the structure of detailed description of the present invention linear vibration electric motor, the specific implementation below with reference to attached drawing to the present invention
Example is described in detail.
Fig. 1 shows the decomposition texture of linear vibration electric motor according to the present invention；Fig. 2 shows according to the present invention linear
The cross-section structure of vibrating motor.
As Fig. 1 and Fig. 2 jointly shown in, the linear vibration electric motor of the embodiment of the present invention, including adaptation connection upper casing 1 and lower casing
8, it is hung on upper casing 1 and vibrational system in lower casing 8, is correspondingly arranged with vibrational system and stator separated by a distance, support
Vibrational system simultaneously provides the spring part 5 of elastic restoring force for it；Vibrational system includes mass block 4 and combines and 4 middle part of mass block
The permanent magnet 3 of position.Wherein, lower casing 8 is stamped and formed out using permeability magnetic material, can generate the magnetic force to attract each other with permanent magnet 3.
The elastic supporting member for supporting optical member 7 being symmetric about stator is provided between mass block 4 and lower casing 8, elastic supporting member for supporting optical member 7 is fixed on matter
On gauge block/lower casing, and it is bonded to each other with lower casing/mass block when mass block 4 is moved, in 4 motion process of mass block, elasticity branch
Support member 7 and lower casing/mass block sliding friction, damping is provided for the vibration of linear vibration electric motor.
Wherein, elastic supporting member for supporting optical member 7 is polyester part, silica gel part or rubber parts etc., i.e., the elastic supporting member for supporting optical member 7 in the present invention can
To select polyester material, rubber or other highly elastic materials to be fabricated, main function is provided the mass block 4 in movement
Damping, it is ensured that it reduces the frictional dissipation in mass block vibration along the X-axis linear movement of linear vibration electric motor, reduces product and makes an uproar
Sound.
In the specific embodiment of the present invention, elastic supporting member for supporting optical member 7 is strip structure, is symmetricly set on stator
Both sides, and be arranged with sub-interval certain distance；Elastic supporting member for supporting optical member 7 includes fixed part and swiping portion, and fixed part is and quality
The block plane swiping portion that either lower casing is fixedly connected is and lower casing or mass block sliding friction and plays having for damping action
The structure of certain radian, for example, arc or domes etc. can be set the cross section in swiping portion to.Wherein, for ease of
The length of the installation of elastic supporting member for supporting optical member, elastic supporting member for supporting optical member 7 is not more than width of the mass block in linear vibration electric motor Y direction,
The height of elastic supporting member for supporting optical member 7 is equal to the distance between mass block and lower casing.
Both in addition, the friction coefficient between the swiping portion and lower casing or mass block of reduction elastic supporting member for supporting optical member 7, reduce
Between frictional dissipation, the present invention linear vibration electric motor in, can be coated on elastic supporting member for supporting optical member 7 or in its swiping portion
The lubricants such as lubricating oil, lubricating fluid.
Embodiment one (fixed part of elastic supporting member for supporting optical member is fixedly connected with lower casing, swiping portion and mass block sliding friction)
In the embodiment one, shell includes being provided with the upper casing 1 of a notch, and be adapted to upper casing 1 and connect and formed
The lower casing 8 of cavity, vibrational system and stator accommodate in this cavity.Wherein, lower casing 8 is made using permeability magnetic material, energy
Enough and permanent magnet 3 generates the magnetic force being mutually attracted.Elastic supporting member for supporting optical member 7 is strip structure, is provided with two, two resilient support
Part 7 is symmetrically fixed on the both sides of stator and keeps certain spacing with it, also, elastic supporting member for supporting optical member 7 is located at the same of mass block 4
Side is provided with magnetic conductive board 2 in the other side of mass block 4, and magnetic conductive board 2 is fitted in mass block 4 by the modes such as pasting or welding
Side on.
Wherein, the both ends of mass block 4 are connect by spring part 5 with the sidewall elastomer of upper casing 1 respectively, are by spring part 5
The movement of mass block 4 provides elastic restoring force, and in 4 motion process of mass block, elastic supporting member for supporting optical member 7 is fixed on static on lower casing 8
Motionless, since lower casing 8 is made of permeability magnetic material, the magnetic force between permanent magnet 3 in lower casing 8 and mass block 4 can drive quality
Block 4 is to lower stress, simultaneously because the supporting role of elastic supporting member for supporting optical member 7 so that the mass block 4 in movement only being capable of property vibration along the line
The X-direction of motor moves, and simultaneously sliding friction is bonded with the swiping portion of elastic supporting member for supporting optical member 7.The magnetic property of lower casing 8 is on the one hand
Mass block 4 can be made to be bonded elastic supporting member for supporting optical member 7, the linear movement of mass block 4 is kept, on the other hand can dredge magnetic induction line, increased
The vibration sense of strong linear vibration electric motor.
In addition, when to ensure mass block movement, it can be always maintained at the fit-state with elastic supporting member for supporting optical member 7, in the implementation
In example, when elastic supporting member for supporting optical member 7 is fixed on lower casing 8, mass block 4 close to the end of elastic supporting member for supporting optical member 7 and elastic supporting member for supporting optical member 7 it
Between distance be more than mass block 4 from resting position to the distance of one end motion.For example, in 4 stationary state of mass block, it is located at
Elastic supporting member for supporting optical member 7 on the left of stator be more than at a distance from 4 left end of mass block mass block 4 by stationary state move downward it is maximum away from
From to avoid falling off from elastic supporting member for supporting optical member 7 in 4 motion process of mass block.
Embodiment two (fixed part of elastic supporting member for supporting optical member is fixedly connected with mass block, swiping portion and lower casing sliding friction)
In the embodiment two, shell, spring part, magnetic conductive board and elastic supporting member for supporting optical member structure can use for reference in embodiment one
Description, details are not described herein again.In the embodiment two, elastic supporting member for supporting optical member is located at the same side of mass block, and flexibly supports
The fixed part of part is fixedly connected with mass block, and is moved with the movement of mass block, and the swiping portion of elastic supporting member for supporting optical member is then under
Shell sliding contact.
Wherein, the both ends of mass block are connected by the sidewall elastomer of spring part and upper casing respectively, are quality by spring part
The movement of block provides elastic restoring force, in mass block motion process, elastic supporting member for supporting optical member be fixed on it is stationary on lower casing, due to
Lower casing is made of permeability magnetic material, and the magnetic force meeting trend mass block between lower casing and quality permanent magnet in the block is to lower stress, together
When due to elastic supporting member for supporting optical member effect, mass block in movement only can along property vibrating motor X-direction movement, and with bullet
Property support element swiping portion fitting and sliding friction.On the one hand the magnetic property of lower casing can make mass block fitting resilient support
Part keeps the linear movement of mass block, on the other hand can dredge magnetic induction line, enhances the vibration sense of linear vibration electric motor.
In addition, when to ensure mass block movement, it can be always maintained at the fit-state with elastic supporting member for supporting optical member, in the embodiment
In, when elastic supporting member for supporting optical member is fixed on mass block, the distance between elastic supporting member for supporting optical member of stator and stationary state is more than quality
Block is from resting position to the distance of one end motion.For example, in mass block stationary state, the resilient support on the left of stator
Minimum range between part and stator is more than the maximum distance that mass block is moved downward by stationary state, to avoid mass block from transporting
During dynamic, elastic supporting member for supporting optical member collides with stator.
In the above embodiments, stator includes the stator coil 6 being fixed on lower casing 8, and vibrational system includes at least one
Block permanent magnet is provided with groove corresponding with permanent magnet in the medium position of mass block, and permanent magnet is fixed on corresponding groove
It is interior；Also, the magnetizing direction of permanent magnet is consistent with the axial direction of stator coil 6.
Specifically, vibrational system includes three pieces of permanent magnets being provided adjacent to, the adjoining of two block permanent magnets of adjacent setting
The polarity at end in the Z-direction of linear vibration motor in S-N, N-S, S-N sequence or N-S, S-N, N-S sequence on the contrary, arrange
Row；Also, in each permanent magnet, thickness all same in the Z-axis direction, and centrally located permanent magnet is in linear oscillator
Length in motor X-direction is more than length of the permanent magnet for being adjacent setting in linear vibration electric motor X-direction, can
Volume by increasing permanent magnet makes stator obtain magnetic flux as big as possible, to enhance the seismaesthesia of linear vibration electric motor, obtains
Obtain better user experience.Correspondingly, the size of groove corresponding with permanent magnet and container be also configured as intermediate groove and
The groove of both sides, and the size of intermediate groove is more than the size of the groove of its both sides, to which magnetic liquid to be firmly adsorbed on pair
In the groove answered.
In addition, in the linear vibration electric motor of the present invention, stator includes being arranged in vibrational system far from magnetic conductive board side
Stator coil 6, the axis direction of stator line are consistent with the magnetizing direction of permanent magnet.The axis direction of stator coil 6 is stator line
Direction where the central axis of circle 6, in Fig. 1 and specific embodiment shown in Fig. 2, the mode that magnetizes of permanent magnet is that Z phases are filled
Magnetic, the axis direction of stator coil 6 are vertical direction, and two stator coils 6 being set up in parallel around to direction it is identical or
It is identical that person is passed through the current direction in stator coil.
The linear vibration electric motor of the present invention, further includes flexible circuit board (PFCB, Flexible Printed Circuit
Board)；Wherein, flexible circuit board (not shown) is fixedly connected with lower casing 8, and stator coil 6 is fixed in flexible circuit board
And be connected with it, the connection of linear vibration electric motor internal circuit and external circuit is realized by flexible circuit board.External electric current
After signal is transferred to stator coil 6 by flexible circuit board, stator coil 6 produces under the action of vibrating the magnetic field that the system generates
Raw electromagnetic force, since stator coil 6 is fixed, vibrational system just will receive the reaction force of stator coil 6, in elasticity
Under the cooperation of support element 7, driving vibrational system vibration.
By the above embodiment as can be seen that the linear vibration electric motor of the present invention, lower casing use permeability magnetic material punching press shape
At elastic supporting member for supporting optical member being arranged between mass block and lower casing, the magnetic force between permanent magnet and lower casing makes elastic supporting member for supporting optical member and matter
Gauge block or lower casing are bonded to each other and generate frictional force, and damping is provided for linear vibration electric motor, to spreading bandwidth, reduce
Collision and noise；In addition, setting lower casing to magnetic conductive part, additionally it is possible to dredge the magnetic induction line across stator coil, increase is linearly shaken
The vibration sense of dynamic motor.
Linear vibration electric motor according to the present invention is described in an illustrative manner above with reference to attached drawing.But art technology
Personnel should be appreciated that the linear vibration electric motor proposed for aforementioned present invention, can also be in the base for not departing from the content of present invention
Various improvement are made on plinth.Therefore, protection scope of the present invention should be determined by the content of appended claims.
Claims (9)
1. a kind of linear vibration electric motor, including the upper casing of adaptation connection and lower casing, the vibration that is hung in the upper casing and lower casing
System, the stator being correspondingly arranged with the vibrational system, the support vibrational system simultaneously provide the spring of elastic restoring force for it
Part；Wherein, the vibrational system includes mass block and the permanent magnet for being incorporated into the mass block medium position；It is characterized in that,
The elastic supporting member for supporting optical member is symmetricly set on the both sides of the stator, also, the elastic supporting member for supporting optical member and the sub-interval
Setting, the stator includes the stator coil being fixed on the lower casing；
The lower casing is stamped and formed out by permeability magnetic material, and elastic supporting member for supporting optical member is provided between the mass block and the lower casing；Its
In,
The elastic supporting member for supporting optical member is fixed on the mass block/lower casing, and when the mass block is moved with the lower casing/quality
Block sliding friction.
2. linear vibration electric motor as described in claim 1, which is characterized in that
The elastic supporting member for supporting optical member is polyester part, silica gel part or rubber parts.
3. linear vibration electric motor as described in claim 1, which is characterized in that
The elastic supporting member for supporting optical member is strip structure, including fixed part and swiping portion；Wherein,
The fixed part is fixed with the mass block/lower casing；
The cross section in the swiping portion is arcuate structure, and when the mass block moves, the elastic supporting member for supporting optical member passes through the cunning
Wiping portion and the lower casing/mass block sliding friction.
4. linear vibration electric motor as claimed in claim 3, which is characterized in that
The length of the elastic supporting member for supporting optical member is not more than width of the mass block in the linear vibration electric motor Y direction, institute
The height for stating elastic supporting member for supporting optical member is equal to the distance between the mass block and the lower casing.
5. linear vibration electric motor as claimed in claim 3, which is characterized in that
It is coated with lubricant on the surface in the swiping portion.
6. linear vibration electric motor as described in claim 1, which is characterized in that when the elastic supporting member for supporting optical member is fixed on the quality
When on block,
The distance between the stator and the elastic supporting member for supporting optical member of stationary state are more than the mass block from resting position to one end
The distance of movement.
7. linear vibration electric motor as described in claim 1, which is characterized in that when the elastic supporting member for supporting optical member is fixed on the lower casing
When upper,
The mass block is more than the quality close to the distance between the end of the elastic supporting member for supporting optical member and the elastic supporting member for supporting optical member
Block is from resting position to the distance of one end motion.
8. linear vibration electric motor as described in claim 1, which is characterized in that
Being sticked on surface of the mass block far from the stator has magnetic conductive board.
9. linear vibration electric motor as described in claim 1, which is characterized in that
The vibrational system includes an at least block permanent magnet, is provided with and the permanent magnetism iron phase in the medium position of the mass block
Corresponding groove, the permanent magnet are fixed in corresponding groove；Also,
The magnetizing direction of the permanent magnet is consistent with the axial direction of the stator coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184300.9A CN105680662B (en) | 2016-03-28 | 2016-03-28 | Linear vibration electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610184300.9A CN105680662B (en) | 2016-03-28 | 2016-03-28 | Linear vibration electric motor |
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| Publication Number | Publication Date |
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| CN105680662A CN105680662A (en) | 2016-06-15 |
| CN105680662B true CN105680662B (en) | 2018-07-20 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610184300.9A Active CN105680662B (en) | 2016-03-28 | 2016-03-28 | Linear vibration electric motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106208604B (en) * | 2016-08-24 | 2019-05-24 | 歌尔股份有限公司 | A kind of linear vibration motor |
| CN106300869B (en) * | 2016-08-31 | 2019-05-14 | 浙江省东阳市东磁诚基电子有限公司 | A kind of linear motor being provided simultaneously with X-axis and Z axis vibration feedback |
| CN107515574A (en) * | 2017-08-17 | 2017-12-26 | 深圳市信维通信股份有限公司 | Linear motor adds magnetic liquid equipment and method |
| CN110098715A (en) * | 2019-06-17 | 2019-08-06 | 重庆市灵龙电子有限公司 | Magnetic suspension mobile phone vibrating motor |
| CN110112881A (en) * | 2019-06-17 | 2019-08-09 | 重庆市灵龙电子有限公司 | Magnetic suspension limits mobile phone vibrating motor firmly |
| CN113747313B (en) * | 2020-05-29 | 2024-04-09 | 歌尔股份有限公司 | Sound producing device and electronic equipment |
| CN113747310B (en) * | 2020-05-29 | 2024-04-09 | 歌尔股份有限公司 | Sound producing device and electronic equipment |
| CN113747316B (en) * | 2020-05-29 | 2024-04-09 | 歌尔股份有限公司 | Sound producing device and electronic equipment |
| CN113747311B (en) * | 2020-05-29 | 2024-04-09 | 歌尔股份有限公司 | Sound producing device and electronic equipment |
| CN113747321B (en) * | 2020-05-29 | 2024-04-09 | 歌尔股份有限公司 | Speaker unit and electronic device |
| CN113747314B (en) * | 2020-05-29 | 2024-04-09 | 歌尔股份有限公司 | Sound producing device and electronic equipment |
| CN113747317B (en) * | 2020-05-29 | 2024-04-09 | 歌尔股份有限公司 | Sound producing device and electronic equipment |
| CN113747312B (en) * | 2020-05-29 | 2024-04-09 | 歌尔股份有限公司 | Sound producing device and electronic equipment |
| CN216414146U (en) * | 2020-06-28 | 2022-04-29 | 瑞声科技（南京）有限公司 | Linear vibration motor |
| CN112234799B (en) * | 2020-09-25 | 2022-03-01 | 瑞声新能源发展(常州)有限公司科教城分公司 | Linear motor |
| CN115125050B (en) * | 2021-08-04 | 2023-06-02 | 苏州索迩电子技术有限公司 | Lubrication regulating oil and application thereof |
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| CN102223048A (en) * | 2011-06-08 | 2011-10-19 | 瑞声声学科技(深圳)有限公司 | Vibration motor |
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| CN105680662A (en) | 2016-06-15 |
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