CN107070158B - Linear vibration motor - Google Patents
Linear vibration motor Download PDFInfo
- Publication number
- CN107070158B CN107070158B CN201710354016.6A CN201710354016A CN107070158B CN 107070158 B CN107070158 B CN 107070158B CN 201710354016 A CN201710354016 A CN 201710354016A CN 107070158 B CN107070158 B CN 107070158B
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- mass block
- stator coil
- vibration motor
- vibration
- mass
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- 230000003068 static effect Effects 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims description 11
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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 invention provides a linear vibration motor, which comprises a shell, a first vibration component, a first stator component, a second vibration component and a second stator component, wherein the first vibration component is accommodated in the shell; the first vibration assembly comprises a first mass block, the second vibration assembly comprises a second mass block, the first mass block and the second mass block are elastically connected through a central elastic sheet, and one end of the first mass block, which is far away from the second mass block, and one end of the second mass block, which is far away from the first mass block, are respectively elastically connected with the side wall of the shell through an edge elastic sheet; when the linear vibration motor is in a static state, the first mass block and the second mass block are distributed in a central symmetry mode relative to the mass center of the linear vibration motor; the first stator component and the second stator component are distributed in a central symmetry mode relative to the mass center of the linear vibration motor. The invention can enhance the vibration sense of the linear vibration motor and provide a unique single-side vibration sense experience.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a linear vibration motor with multi-position vibration sensing experience.
Background
With the development of communication technology, portable electronic products, such as mobile phones, palm game machines or palm multimedia entertainment devices, are entering into the lives of people. In these portable electronic products, a micro vibration motor is generally used for system feedback, such as call prompt of a mobile phone, vibration feedback of a game machine, and the like. However, along with the trend of thinning electronic products, various components inside the electronic products are required to adapt to the trend, and the micro vibration motor is no exception.
The conventional miniature vibration motor generally comprises an upper cover, a lower cover forming a vibration space with the upper cover, a vibrator (comprising a balancing weight and a permanent magnet) which can do linear reciprocating vibration in the vibration space, an elastic support piece which is connected with the upper cover and enables the vibrator to do reciprocating vibration, and a stator coil which is positioned below the vibrator for a certain distance.
In the miniature vibration motor with the structure, the force for driving the vibrator to vibrate is derived from the magnetic field force between a group of vibrators and the stator coil, the vibration mode is single, and the user experience is poor; further, the driving force of the single stator coil is limited, and the vibration feeling of the vibrator is not strong enough.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a linear vibration motor, so as to solve the problems of insufficient driving force, single vibration position, and the like of the single vibrator and stator coil at present.
The invention provides a linear vibration motor, which comprises a shell, a first vibration component, a first stator component, a second vibration component and a second stator component, wherein the first vibration component is accommodated in the shell; the first vibration assembly comprises a first mass block, the second vibration assembly comprises a second mass block, the first mass block and the second mass block are elastically connected through a central elastic sheet, and one end of the first mass block, which is far away from the second mass block, and one end of the second mass block, which is far away from the first mass block, are respectively elastically connected with the side wall of the shell through an edge elastic sheet; when the linear vibration motor is in a static state, the first mass block and the second mass block are distributed in a central symmetry mode relative to the mass center of the linear vibration motor; the first stator component and the second stator component are distributed in a central symmetry mode relative to the mass center of the linear vibration motor.
In addition, the cross sections of the first mass block and the second mass block are of L-shaped step structures, the first mass block is provided with a first step, and the second mass block is provided with a second step; a central elastic sheet is arranged between one end of the first mass block, which is close to the second mass block, and the second step, and a central elastic sheet is also arranged between one end of the second mass block, which is close to the first mass block, and the first step.
In addition, the first mass block and the second mass block are matched to form a cuboid structure.
In addition, the preferred scheme is that at least one first permanent magnet is embedded in the first mass block, and at least one second permanent magnet is embedded in the second mass block; the number of the first permanent magnets is the same as the number of the second permanent magnets.
Furthermore, preferably, the first stator assembly includes a first electrical connection plate fixed on an inner sidewall of the housing and a first stator coil coupled to the first electrical connection plate, and the second stator assembly includes a second electrical connection plate fixed on the inner sidewall of the housing and a second stator coil coupled to the second electrical connection plate; the first stator coil is disposed corresponding to the first permanent magnet, and the second stator coil is disposed corresponding to the second permanent magnet.
In addition, the preferred scheme is that the winding directions of the first stator coil and the second stator coil are the same, and the directions of the introduced currents are opposite; alternatively, the first stator coil and the second stator coil are wound in opposite directions and the directions of the current flowing in the coils are the same.
Furthermore, it is preferred that the direction of the stress of the first mass is identical to that of the second mass.
In addition, the preferred scheme is that the winding directions of the first stator coil and the second stator coil are opposite, and the directions of the introduced currents are opposite; alternatively, the first stator coil and the second stator coil have the same winding direction and the same current flowing in direction.
In addition, the preferable scheme is that the first mass block is forced to move and the second mass block is static by controlling the energizing sequence of the first stator coil and the second stator coil; alternatively, the second mass is forced to move and the first mass is stationary.
Furthermore, it is preferable that the housing includes an upper case of a rectangular parallelepiped structure, and a lower case which is adapted to be connected to and coupled at an opening of the upper case.
By using the linear vibration motor, two groups of vibration components and stator components are arranged, when one group of vibration components vibrate horizontally, the central elastic sheet is extruded and deformed, and the other group of vibration components generate acting force in the horizontal direction, and the acting force opposite to the deformation direction of the central elastic sheet can be provided by controlling the other vibration components, so that one group of vibration components vibrate, and the other group of vibration components are in a static vibration mode, and unique single-side vibration experience can be provided in special application occasions such as games; and when the first vibration component and the second vibration component vibrate in the same direction at the same time, stronger vibration sense can be obtained.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Furthermore, the invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and attainments together with a more complete understanding of the invention will become apparent and appreciated by referring to the following description taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is an exploded structural view of a linear vibration motor according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the overall structure of a vibration assembly of a linear vibration motor according to an embodiment of the present invention;
fig. 3 is a partial structural schematic view of a linear vibration motor according to an embodiment of the present invention.
Wherein reference numerals include: the upper shell 1, the first stator coil 21, the second stator coil 22, the first permanent magnet 31, the second permanent magnet 32, the first electric connection plate 41, the second electric connection plate 42, the first mass block 51, the second mass block 52, the edge spring 6, the center spring 7 and the lower shell 8.
The same reference numerals will be used throughout the drawings to refer to similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
The term "mass" as used in the following description of the embodiments may also be referred to as "balancing weight", and refers to a high-mass, high-density metal mass that is fixed to a vibrating mass that generates vibration to enhance vibration balance.
In addition, the present invention is mainly used for improvement of a micro-vibration motor, but it does not exclude application of the technique in the present invention to a large-sized vibration motor. However, for the purpose of description, in the following description of the embodiments, the terms "linear vibration motor" and "micro vibration motor" are used in the same sense.
In order to describe the structure of the linear vibration motor of the present invention in detail, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 illustrates an exploded structure of a linear vibration motor according to an embodiment of the present invention; fig. 2 and 3 show partial structures of a linear vibration motor according to an embodiment of the present invention from different angles, respectively.
As shown in fig. 1 to 3 together, the linear vibration motor according to the embodiment of the present invention includes a housing, a first vibration assembly accommodated in the housing, a first stator assembly disposed corresponding to the first vibration assembly, and a second vibration assembly, a second stator assembly disposed corresponding to the second vibration assembly; the first vibration component comprises a first mass block 51, the second vibration component comprises a second mass block 52, the first mass block 51 and the second mass block 52 are elastically connected through a central elastic sheet 7, one end of the first mass block 51, which is far away from the second mass block 52, and one end of the second mass block 52, which is far away from the first mass block 51, are respectively elastically connected with the side wall of the shell through a side elastic sheet 6; when the linear vibration motor is in a stationary state, the first mass 51 and the second mass 52 are distributed in a central symmetry manner with respect to the center of mass of the linear vibration motor, and the first stator assembly and the second stator assembly are distributed in a central symmetry manner with respect to the center of mass of the linear vibration motor.
Specifically, the cross section or side view structures of the first mass block 51 and the second mass block 52 are both L-shaped step structures, a first step (not shown in the figure) is provided on the first mass block 51, a second step (not shown in the figure) is provided on the second mass block 52, the step structures of the first mass block 51 and the second mass block 52 are opposite in direction, and the first mass block 51 and the second mass block 52 can be matched together to form a regular cuboid structure without the central spring plate 7. Wherein, a center spring piece 7 is disposed between one end of the first mass block 51, which is close to the second mass block 52, and the second step, and a center spring piece 7 is also disposed between one end of the second mass block 52, which is close to the first mass block 51, and the stress directions and the magnitudes of the two center spring pieces 7 are the same. The first mass 51 and the second mass 52 are suspended in the housing by the combined action of the two edge spring plates 6 and the two center spring plates 7.
In a specific embodiment of the present invention, the first vibration assembly further includes at least one first permanent magnet 31 embedded in the first mass 51, the second vibration assembly further includes at least one second permanent magnet 32 embedded in the second mass 52, and the arrangement positions of the first permanent magnet 31 and the second permanent magnet 32 are symmetrically distributed about the center of mass of the linear vibration motor, that is, the number, the size and the magnetizing direction of the first permanent magnet 31 and the second permanent magnet 32 are the same, so that when providing a unilateral vibration feeling experience for a user, the stress balance of the two sets of vibration assemblies (including the first vibration assembly and the second vibration assembly) can be ensured.
One or a plurality of limit grooves corresponding to the first permanent magnet/the second permanent magnet are formed in the first mass block/the second mass block, the first permanent magnet/the second permanent magnet can be fixed in the corresponding limit grooves respectively in a gluing mode or a laser spot welding mode, and the number, the size, the magnetizing direction and the like of the first permanent magnet/the second permanent magnet can be properly selected according to the vibration force required by an application product. Meanwhile, the first mass block/the second mass block can be made of high-density metal materials such as tungsten steel blocks or nickel tungsten alloy, so that vibration force is increased, and the vibration of the electronic product is stronger.
In another embodiment of the present invention, the first stator assembly includes a first electric connection plate 41 fixed to the inner side wall of the housing and a first stator coil 21 coupled to the first electric connection plate 41, and the second stator assembly includes a second electric connection plate 42 fixed to the inner side wall of the housing and disposed in parallel with the first electric connection plate 41 and a second stator coil 22 coupled to the second electric connection plate 42. The corresponding arrangement of the first stator coil 21 and the first permanent magnet 31, the corresponding arrangement of the second stator coil 22 and the second permanent magnet 32, and then the first stator assembly provides vibration excitation for the first vibration assembly to promote the first vibration assembly to move under force, and the second stator assembly provides vibration excitation for the second vibration assembly to promote the second vibration assembly to move under force.
Note that, when the winding directions of the first stator coil 21 and the second stator coil 22 are the same, the directions of the current flowing in are opposite; or when the winding directions of the first stator coil 21 and the second stator coil 22 are opposite and the directions of the introduced currents are the same, the first stator coil 21 and the second stator coil 22 are conducted simultaneously, the first rotor component and the second rotor component can receive driving forces in the same direction, namely, the two groups of vibration components obtain linear driving forces in the same direction, so that the vibration sense of the linear vibration motor can be enhanced, and the vibration sense experience of a user is improved.
When the winding directions of the first stator coil 21 and the second stator coil 22 are opposite, the directions of the introduced currents are opposite; or when the winding directions of the first stator coil 21 and the second stator coil 22 are the same and the directions of the introduced currents are the same, the first mass block 51 is forced to move and the second mass block 52 is static by controlling the sequence of the energization of the first stator coil 21 and the second stator coil 22; alternatively, the second mass 52 is forced to move and the first mass 51 is stationary.
For example, the first stator coil 21 is controlled to be conducted first, the first vibration component receives a driving force along the horizontal direction and extrudes the central elastic sheet 7 to generate elastic deformation, and then the central elastic sheet 7 generates a acting force on the second vibration component along the horizontal direction; then, by controlling the signal of the circuit of the second stator coil, the reverse acting force of the deformation of the balance center spring sheet 7 can be provided for the second vibration assembly, so that the vibration of the first vibration assembly is achieved, and the vibration mode of the second vibration assembly is still.
Similarly, the second stator coil 22 is controlled to be conducted first, the second vibration assembly is driven by the driving force along the horizontal direction and extrudes the central elastic sheet 7 to generate elastic deformation, then the central elastic sheet 7 generates acting force along the horizontal direction on the first vibration assembly, then the signal control is performed through the circuit of the first stator coil 21, the reverse acting force for balancing the deformation of the central elastic sheet 7 can be provided for the first vibration assembly, and therefore the vibration of the second vibration assembly is achieved, and the static vibration mode of the first vibration assembly is achieved.
The signal control by the circuit of the first stator coil mainly means control of the time of the current signal flowing through the first stator coil, the magnitude and direction of the current signal flowing through the first stator coil, and the like. The signal control by the circuit of the second stator coil mainly means control of the time of the current signal flowing in the second stator coil, the magnitude and direction of the current signal flowing in the second stator coil, and the like. And further, the two groups of stator coils (comprising the first stator coil 21 and the second stator coil 22) are used for realizing the same-direction vibration of the two groups of vibration components or the multiple vibration modes of the vibration of any group of vibration components.
In another embodiment of the present invention, the housing of the linear vibration motor includes an upper case 1 of a rectangular parallelepiped structure and a lower case 8 fittingly connected to the upper case 1 and coupled at an opening of the upper case 1. Wherein, the first electric connection plate 41 is fixed on the inner side wall of the upper shell 1, the first stator coil 21 is stuck or buckled on the first electric connection plate 41 and is conducted with the first electric connection plate 41, the second electric connection plate 42 is fixed on the horizontal side wall of the lower shell 8, and the second stator coil 22 is stuck or buckled on the second electric connection plate 42 and is conducted with the second electric connection plate 42.
The first electric connection plate and the second electric connection plate can be respectively conducted with an external circuit, or can be conducted with the external circuit after being conducted with each other. In the embodiment shown in fig. 1, the first electric connection plate 41 is turned 90 degrees and then is conducted with the second electric connection plate 42, so that the external spring sheet on the second electric connection plate 42 is conducted with an external device terminal, and finally, the conduction of an internal circuit and an external circuit of the linear vibration motor is realized. In addition, the electrical connection board (including the first electrical connection board 41 and the second electrical connection board 42) may be a circuit board such as a flexible circuit board (PFCB, flexible Printed Circuit Board).
According to the linear vibration motor provided by the embodiment of the invention, the two groups of vibration components and the corresponding stator components are arranged, and through controlling the stator components respectively, the simultaneous same-direction vibration of the two groups of vibration components or the vibration of the single group of vibration components and other multiple vibration modes can be realized, so that the single-side vibration feeling experience of a user in special application occasions can be met, and the linear vibration motor has the advantages of simple structure, multiple vibration forms, strong vibration feeling and stable performance.
The linear vibration motor according to the present invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the linear vibration motor as set forth in the foregoing invention without departing from the spirit of the invention. Accordingly, the scope of the invention should be determined from the following claims.
Claims (9)
1. The linear vibration motor is characterized by comprising a shell, a first vibration assembly, a first stator assembly, a second vibration assembly and a second stator assembly, wherein the first vibration assembly is accommodated in the shell;
the first vibration assembly comprises a first mass block, the second vibration assembly comprises a second mass block, the first mass block and the second mass block are elastically connected through a central elastic sheet, and one end, far away from the second mass block, of the first mass block and one end, far away from the first mass block, of the second mass block are respectively elastically connected with the side wall of the shell through side elastic sheets; the cross sections of the first mass block and the second mass block are of L-shaped step structures, a first step is arranged on the first mass block, and a second step is arranged on the second mass block; the center spring piece is arranged between one end, close to the second mass block, of the first mass block and the second step, and the center spring piece is also arranged between one end, close to the first mass block, of the second mass block and the first step;
the first stator assembly comprises a first electric connection plate fixed on the inner side wall of the shell and a first stator coil combined on the first electric connection plate, and the second stator assembly comprises a second electric connection plate fixed on the inner side wall of the shell and a second stator coil combined on the second electric connection plate;
when the linear vibration motor is in a static state, the first mass block and the second mass block are distributed in a central symmetry mode relative to the mass center of the linear vibration motor.
2. A linear vibration motor according to claim 1, wherein,
the first mass block and the second mass block are matched to form a cuboid structure.
3. A linear vibration motor according to claim 1, wherein,
at least one first permanent magnet is embedded in the first mass block, and at least one second permanent magnet is embedded in the second mass block;
the number of the first permanent magnets is the same as the number of the second permanent magnets.
4. A linear vibration motor according to claim 3, wherein,
the first stator coil and the first permanent magnet are correspondingly arranged, and the second stator coil and the second permanent magnet are correspondingly arranged.
5. The linear vibration motor according to claim 4, wherein,
the winding directions of the first stator coil and the second stator coil are the same, and the directions of the introduced currents are opposite; or the first stator coil and the second stator coil are opposite in winding direction and the direction of the introduced current is the same.
6. The linear vibration motor according to claim 5, wherein,
the stress direction of the first mass block is consistent with that of the second mass block.
7. The linear vibration motor according to claim 4, wherein,
the winding directions of the first stator coil and the second stator coil are opposite, and the directions of the introduced currents are opposite; or the first stator coil and the second stator coil have the same winding direction and the same current flowing direction.
8. The linear vibration motor of claim 7, wherein the motor is configured to control the motor,
the first mass block is forced to move and the second mass block is static by controlling the energizing sequence of the first stator coil and the second stator coil; alternatively, the second mass is forced to move and the first mass is stationary.
9. A linear vibration motor according to claim 1, wherein,
the shell comprises an upper shell with a cuboid structure and a lower shell which is connected with the upper shell in an adapting mode and combined at an opening of the upper shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710354016.6A CN107070158B (en) | 2017-05-18 | 2017-05-18 | Linear vibration motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710354016.6A CN107070158B (en) | 2017-05-18 | 2017-05-18 | Linear vibration motor |
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| Publication Number | Publication Date |
|---|---|
| CN107070158A CN107070158A (en) | 2017-08-18 |
| CN107070158B true CN107070158B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710354016.6A Active CN107070158B (en) | 2017-05-18 | 2017-05-18 | Linear vibration motor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110022045B (en) * | 2019-04-28 | 2020-06-30 | 维沃移动通信有限公司 | Vibrator and terminal |
| CN112838783B (en) * | 2021-01-07 | 2023-04-25 | 歌尔微电子股份有限公司 | Piezoelectric vibration motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520056A (en) * | 2008-02-26 | 2009-09-02 | 日本电产株式会社 | Axial flow fan unit |
| KR20130120040A (en) * | 2012-04-25 | 2013-11-04 | 삼성전기주식회사 | Linear motor |
| CN205004932U (en) * | 2015-09-07 | 2016-01-27 | 瑞声光电科技(常州)有限公司 | Linear motor |
| CN106026602A (en) * | 2016-05-30 | 2016-10-12 | 歌尔声学股份有限公司 | Linear vibration motor |
-
2017
- 2017-05-18 CN CN201710354016.6A patent/CN107070158B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101520056A (en) * | 2008-02-26 | 2009-09-02 | 日本电产株式会社 | Axial flow fan unit |
| KR20130120040A (en) * | 2012-04-25 | 2013-11-04 | 삼성전기주식회사 | Linear motor |
| CN205004932U (en) * | 2015-09-07 | 2016-01-27 | 瑞声光电科技(常州)有限公司 | Linear motor |
| CN106026602A (en) * | 2016-05-30 | 2016-10-12 | 歌尔声学股份有限公司 | Linear vibration motor |
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