CN220985511U - Linear vibration motor - Google Patents
Linear vibration motor Download PDFInfo
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- CN220985511U CN220985511U CN202322398006.6U CN202322398006U CN220985511U CN 220985511 U CN220985511 U CN 220985511U CN 202322398006 U CN202322398006 U CN 202322398006U CN 220985511 U CN220985511 U CN 220985511U
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- magnetic steel
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- steel
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 125
- 239000010959 steel Substances 0.000 claims abstract description 125
- 239000006260 foam Substances 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims 3
- 239000000725 suspension Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The utility model provides a linear vibration motor, which comprises a shell, a stator and a vibrator accommodated in the shell, and an elastic piece suspending the vibrator in the shell, wherein the vibrator comprises a mass block fixedly connected with the elastic piece and provided with a through hole, and a magnetic circuit system accommodated in the through hole, the magnetic circuit system comprises a first magnetic steel arranged on one side of the stator in a direction perpendicular to the vibration direction of the vibrator and a second magnetic steel arranged on the other side of the stator in the direction perpendicular to the vibration direction of the vibrator, the first magnetic steel and the second magnetic steel extend in parallel and are symmetrically arranged with the geometric center of the stator as the center, the first magnetic steel comprises a first magnetic steel part which is positioned outside the second magnetic steel along the orthographic projection in the direction perpendicular to the vibration direction of the vibrator, the second magnetic steel comprises a second magnetic steel part which is positioned outside the first magnetic steel along the orthographic projection in the vibration direction perpendicular to the vibration direction of the vibrator, and the design of the asymmetric magnetic circuit structure can improve the nonlinear vibration condition of the vibration motor and improve the stability and yield of test.
Description
[ Field of technology ]
The present disclosure relates to linear vibration motors, and particularly to a magnetic circuit structure of a linear vibration motor.
[ Background Art ]
The linear motor is a transmission device for directly converting electric energy into linear motion mechanical energy, and is also called a linear motor, a push rod motor and the like. The linear motor generally comprises a vibrator and a stator, and the reciprocating motion of the vibrator is realized under the action of ampere force generally, and the vibrator does not need to be driven by a transmission mechanism such as a gear. The linear motor has the advantages of simple structure, high acceleration, high precision and the like, and is widely applied to different manufacturing and processing technical fields.
The magnetic circuit of the linear vibration motor in the prior art is designed into a symmetrical structure, but the stator is easy to deviate in installation position during fixing, so that nonlinear vibration of the vibration motor is caused.
Accordingly, it is necessary to provide a new linear vibration motor to solve the above-mentioned technical problems.
[ utility model ]
The utility model aims to provide a linear vibration motor with better stability and yield.
The technical scheme of the utility model is as follows: the utility model provides a linear vibration motor, which comprises a shell with an accommodating space, a stator, a vibrator and an elastic piece, wherein the stator and the vibrator are accommodated in the accommodating space, the elastic piece is fixed on the shell and suspends the vibrator in the accommodating space, the vibrator comprises a mass block which is fixedly connected with the elastic piece and is provided with a through hole, and a magnetic circuit system accommodated in the through hole, the magnetic circuit system comprises a first magnetic steel arranged on one side of the stator in a direction perpendicular to the vibration direction of the vibrator and a second magnetic steel arranged on the other side of the stator in a direction perpendicular to the vibration direction of the vibrator, the first magnetic steel and the second magnetic steel extend in parallel and are symmetrically arranged with the geometric center of the stator as a center, the first magnetic steel comprises a first magnetic steel part which is positioned outside the second magnetic steel along the orthographic projection in the direction perpendicular to the vibration direction of the vibrator, and the second magnetic steel part which is positioned outside the first magnetic steel along the orthographic projection in the direction perpendicular to the vibration direction of the vibrator.
Preferably, the length of the first magnetic steel part is equal to the length of the second magnetic steel part.
Preferably, the ratio of the length of the first magnetic steel part to the length of the first magnetic steel is not more than 1/10, and the ratio of the length of the second magnetic steel part to the length of the second magnetic steel is not more than 1/10.
Preferably, the ratio of the length of the first magnetic steel part to the length of the first magnetic steel is in the range of 1/25 and 1/20, and the ratio of the length of the second magnetic steel part to the length of the second magnetic steel is in the range of 1/25 and 1/20.
Preferably, the magnetic circuit system comprises a third magnetic steel arranged on one side of the stator in the vibration direction of the vibrator and a fourth magnetic steel arranged on the other side of the stator in the vibration direction of the vibrator, and the third magnetic steel and the fourth magnetic steel are symmetrically arranged by taking the geometric center of the stator as a central axis.
Preferably, the distance between the first magnetic steel and the stator is equal to the distance between the second magnetic steel and the stator, and the distance between the third magnetic steel and the stator is equal to the distance between the fourth magnetic steel and the stator.
Preferably, the magnetic circuit system comprises a first magnetic conduction sheet clamped between the first magnetic steel and the mass block, a second magnetic conduction sheet clamped between the second magnetic steel and the mass block, a third magnetic conduction sheet clamped between the third magnetic steel and the mass block, and a fourth magnetic conduction sheet clamped between the fourth magnetic steel and the mass block.
Preferably, the first magnetic conductive sheet is aligned with and equal in length to the first magnetic steel, the second magnetic conductive sheet is aligned with and equal in length to the second magnetic steel, the third magnetic conductive sheet is aligned with and equal in length to the third magnetic steel, and the fourth magnetic conductive sheet is aligned with and equal in length to the fourth magnetic steel.
Preferably, the elastic piece comprises an elastic arm arranged at intervals with the mass block, a first connecting arm bent and extended from one end of the elastic arm and fixed with the mass block, and a second connecting arm bent and extended from the other end of the elastic arm and fixed with the shell, and the linear vibration motor further comprises foam clamped between the elastic arm and the mass block.
The utility model has the beneficial effects that: compared with the prior art, the asymmetric magnetic circuit structure design can improve the nonlinear vibration condition of the vibration motor when the mounting position of the stator is deviated, and improve the stability and yield of the test.
[ Description of the drawings ]
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
Fig. 1 is a schematic perspective view of a linear vibration motor according to an embodiment of the present utility model;
Fig. 2 is a schematic perspective view of the linear vibration motor shown in fig. 1 with a lower cover removed;
fig. 3 is an exploded view of the linear vibration motor shown in fig. 1;
FIG. 4 is a cross-sectional view of the linear vibration motor shown in FIG. 1 along line A-A;
Fig. 5 is a schematic structural diagram of a magnetic circuit system and a stator in the linear vibration motor shown in fig. 1.
[ Detailed description ] of the invention
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, the present utility model provides a linear vibration motor 100, which includes a housing 1, a stator 2 mounted in the housing 1, a vibrator 3, an elastic member 4 suspending the vibrator 3 in the housing 1, a foam 5 disposed between the elastic member 4 and the vibrator 3, and a circuit board 6 partially fixed in the housing 1, wherein the circuit board 6 is fixed to the housing 1 and electrically connected to the stator 2, defines a vibration direction of the vibrator 3 as a Y-axis direction, defines a vibration direction perpendicular to the vibrator 3 as an X-axis direction, and the linear vibration motor 100 in this embodiment is rectangular, and has a long axis direction, i.e., a Y-axis direction, and a short axis direction, i.e., an X-axis direction.
The casing 1 includes a lower cover 11 and an upper cover 12 covering the lower cover 11, the stator 2 is fixed on one side of the lower cover 11 close to the upper cover 12, the lower cover 11 and the upper cover 12 are fixedly enclosed to form an accommodating space 10 for accommodating the stator 2, the vibrator 3 and the elastic member 4, and the casing 1 further includes a groove 101 for the other end of the circuit board 6 to extend to the outside.
The stator 2 includes a core 21 and a coil 22 wound around the core 21.
The vibrator 3 includes a mass block 31 having a through hole 310 and a magnetic circuit 32 accommodated in the through hole 310, the magnetic circuit 32 includes a first magnetic steel 301 disposed on one side of the stator 2 in the X-axis direction, a second magnetic steel 302 disposed on the other side of the stator 2 in the X-axis direction, a third magnetic steel 303 disposed on one side of the stator 2 in the Y-axis direction, and a fourth magnetic steel 304 disposed on the other side of the stator 2 in the Y-axis direction, the first magnetic steel 301 and the second magnetic steel 302 extend in parallel in the Y-axis direction and are symmetrically disposed with the geometric center of the stator 2 as a center, and the third magnetic steel 303 and the fourth magnetic steel 304 extend in parallel in the X-axis direction and are symmetrically disposed with the geometric center of the stator 2 as a center.
The distance D 1 between the first magnetic steel 301 and the stator 2, the distance D 2 between the first magnetic steel 302 and the stator 2, the distance D 3 between the third magnetic steel 303 and the stator 2, and the distance D 4 between the fourth magnetic steel 304 and the stator 2 satisfy the relationship D 1＝D2、D3＝D4、D1＜D3.
The first magnetic steel 301 includes a first magnetic steel portion 3011 located outside the second magnetic steel 302 along the orthographic projection in the X-axis direction, the second magnetic steel 302 includes a second magnetic steel portion 3021 located outside the first magnetic steel 301 along the orthographic projection in the X-axis direction, a ratio of a length of the first magnetic steel portion 3011 to a length of the first magnetic steel 301 is not more than 1/10, and a ratio of a length of the second magnetic steel portion 3021 to a length of the second magnetic steel 302 is not more than 1/10, in this embodiment, preferably, the length of the first magnetic steel portion 3011 occupies 4.5% of the total length of the first magnetic steel 301, and the length of the second magnetic steel portion 3021 occupies 4.5% of the total length of the second magnetic steel.
The magnetic circuit 32 further comprises a first magnetic conductive sheet 311 clamped between the first magnetic steel 301 and the mass block 31, a second magnetic conductive sheet 312 clamped between the second magnetic steel 302 and the mass block 31, a third magnetic conductive sheet 313 clamped between the third magnetic steel 303 and the mass block 31, and a fourth magnetic conductive sheet 314 clamped between the fourth magnetic steel 304 and the mass block 31, wherein the first magnetic conductive sheet 311 is aligned with the first magnetic steel 301 and has equal length, the second magnetic conductive sheet 312 is aligned with the second magnetic steel 302 and has equal length, the third magnetic conductive sheet 313 is aligned with the third magnetic steel 303 and has equal length, and the fourth magnetic conductive sheet 314 is aligned with the fourth magnetic steel 304 and has equal length.
The elastic member 4 includes an elastic arm 41 disposed at a distance from the mass block 31, a first connecting arm 42 bent from one end of the elastic arm 41 and extending to be fixed to the mass block 31, and a second connecting arm 43 bent from the other end of the elastic arm 41 and extending to be fixed to the housing 1.
The linear vibration motor 100 includes a first tab 71 to which the first connection arm 42 and the mass 31 are welded by a welding point, and a second tab 72 to which the second connection arm 43 and the upper cover 12 are welded by a welding point.
The linear vibration motor 100 further includes a stopper 8, and the stopper 8 is fixed to the lower cover 11 and is used for limiting the displacement of the vibrator 3.
Compared with the prior art, the utility model provides a linear vibration motor, which comprises a shell with an accommodating space, a stator and a vibrator accommodated in the accommodating space, and an elastic piece fixed on the shell and suspending the vibrator in the accommodating space, wherein the vibrator comprises a mass block fixedly connected with the elastic piece and provided with a through hole, and a magnetic circuit system accommodated in the through hole, the magnetic circuit system comprises a first magnetic steel arranged on one side of the stator in the direction perpendicular to the vibration direction of the vibrator and a second magnetic steel arranged on the other side of the stator in the direction perpendicular to the vibration direction of the vibrator, the first magnetic steel and the second magnetic steel extend in parallel and are symmetrically arranged by taking the geometric center of the stator as the center, the first magnetic steel comprises a first magnetic steel part positioned outside the second magnetic steel along the orthographic projection in the direction perpendicular to the vibration direction of the vibrator, and the second magnetic steel comprises a second magnetic steel part positioned outside the first magnetic steel along the orthographic projection in the direction perpendicular to the vibration direction of the vibrator.
While the utility model has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the utility model.
Claims (9)
1. The utility model provides a linear vibrating motor, includes the casing that has accommodation space, accept in stator and oscillator in the accommodation space and be fixed in the casing and will the oscillator is in suspension in the elastic component of accommodation space, the oscillator include with elastic component fixed connection and have the quality piece of through-hole and accept in magnetic circuit in the through-hole, magnetic circuit includes perpendicular to the direction of vibration of oscillator set up in first magnet steel of stator one side and perpendicular to the direction of vibration of oscillator set up in the second magnet steel of stator opposite side, its characterized in that, first magnet steel with second magnet steel parallel extension and with the geometric center of stator is central symmetry sets up, first magnet steel includes along perpendicular to the direction of vibration of oscillator orthographic projection is located the first magnet steel portion outside the second magnet steel, the second magnet steel includes along perpendicular to the direction of vibration of oscillator orthographic projection is located the second magnet steel portion outside the first magnet steel.
2. The linear vibration motor of claim 1, wherein the length of the first magnetic steel portion is equal to the length of the second magnetic steel portion.
3. The linear vibration motor of claim 2, wherein a ratio of a length of the first magnetic steel portion to a length of the first magnetic steel is not more than 1/10, and a ratio of a length of the second magnetic steel portion to a length of the second magnetic steel is not more than 1/10.
4. A linear vibration motor according to claim 3, wherein the ratio of the length of the first magnetic steel portion to the length of the first magnetic steel is in the range of between 1/25 and 1/20, and the ratio of the length of the second magnetic steel portion to the length of the second magnetic steel portion is in the range of between 1/25 and 1/20.
5. The linear vibration motor according to claim 4, wherein the magnetic circuit system includes a third magnetic steel provided on one side of the stator in a vibration direction of the vibrator and a fourth magnetic steel provided on the other side of the stator in the vibration direction of the vibrator, and the third magnetic steel and the fourth magnetic steel are symmetrically provided with a geometric center of the stator as a central axis.
6. The linear vibration motor of claim 5, wherein a distance between the first magnetic steel and the stator is equal to a distance between the second magnetic steel and the stator, and a distance between the third magnetic steel and the stator is equal to a distance between the fourth magnetic steel and the stator.
7. The linear vibration motor of claim 5, wherein the magnetic circuit system includes a first magnetic conductive sheet sandwiched between the first magnetic steel and the mass, a second magnetic conductive sheet sandwiched between the second magnetic steel and the mass, a third magnetic conductive sheet sandwiched between the third magnetic steel and the mass, and a fourth magnetic conductive sheet sandwiched between the fourth magnetic steel and the mass.
8. The linear vibration motor of claim 7, wherein the first magnetic conductive sheet is aligned and equal in length to the first magnetic steel, the second magnetic conductive sheet is aligned and equal in length to the second magnetic steel, the third magnetic conductive sheet is aligned and equal in length to the third magnetic steel, and the fourth magnetic conductive sheet is aligned and equal in length to the fourth magnetic steel.
9. The linear vibration motor of claim 1, wherein the elastic member includes an elastic arm disposed at a distance from the mass block, a first connecting arm bent from one end of the elastic arm and fixed to the mass block, and a second connecting arm bent from the other end of the elastic arm and fixed to the housing, and further includes foam sandwiched between the elastic arm and the mass block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322398006.6U CN220985511U (en) | 2023-09-04 | 2023-09-04 | Linear vibration motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322398006.6U CN220985511U (en) | 2023-09-04 | 2023-09-04 | Linear vibration motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220985511U true CN220985511U (en) | 2024-05-17 |
Family
ID=91055675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322398006.6U Active CN220985511U (en) | 2023-09-04 | 2023-09-04 | Linear vibration motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220985511U (en) |
-
2023
- 2023-09-04 CN CN202322398006.6U patent/CN220985511U/en active Active
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