CN211321179U - Linear vibration motor - Google Patents
Linear vibration motor Download PDFInfo
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- CN211321179U CN211321179U CN201922245797.2U CN201922245797U CN211321179U CN 211321179 U CN211321179 U CN 211321179U CN 201922245797 U CN201922245797 U CN 201922245797U CN 211321179 U CN211321179 U CN 211321179U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 161
- 239000010959 steel Substances 0.000 claims abstract description 161
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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Abstract
The utility model provides a linear vibration motor, it includes casing, oscillator, elastic component, coil pack and the magnetic spring spare that has accommodating space, and the oscillator includes magnetic circuit, and magnetic circuit includes first magnet steel and second magnet steel, and first magnet steel and second magnet steel magnetize along the direction of motion of oscillator, and the magnetic pole of first magnet steel and second magnet steel opposite face is the same; the magnetic spring part is magnetic steel and is magnetized along the motion direction perpendicular to the vibrator, the magnetic spring part comprises a first magnetic spring part and a second magnetic spring part which are arranged on the two opposite sides of the motion direction of the vibrator of the coil assembly, and the magnetic poles of the first magnetic spring part and the second magnetic spring part which face the vibrator are opposite to the magnetic poles of the opposite faces of the first magnetic steel and the second magnetic steel respectively. Compared with the prior art, the utility model discloses linear vibrating motor vibration performance is good and the reliability is high.
Description
Technical Field
The utility model relates to a motor especially relates to a linear vibrating motor of application in mobile electronic product field.
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 more and more sought after by people, and these electronic products generally use linear vibration motors to perform system feedback, such as incoming call prompt, information prompt, navigation prompt, vibration feedback of game consoles, and the like. Such a wide application requires a vibration motor having excellent performance and a long service life.
The linear vibration motor in the related art includes a housing having an accommodating space, a vibrator located in the accommodating space, an elastic member fixing and suspending the vibrator in the accommodating space, and a coil assembly fixed to the housing, and the vibrator is driven to perform reciprocating linear motion to generate vibration by interaction between a magnetic field generated by a coil and a magnetic field generated by the vibrator. The coil assembly comprises an iron core, two magnetic shoes and a coil, wherein the two magnetic shoes extend from two opposite ends of the iron core and are fixed on the shell; the oscillator comprises two magnetic steels which are arranged in parallel along the motion direction of the oscillator and are spaced from the coil assembly.
However, in the linear vibration motor in the related art, the magnetic attraction of the iron core and the magnetic shoe to the magnetic steel causes the vibrator to have positive stiffness, and in order to overcome the positive stiffness, the elastic member needs to be designed to have a large stiffness, which causes a large stress on the elastic member, and easily causes the elastic member to be damaged or deformed when the vibrator vibrates, thereby reducing the reliability of the product. Therefore, in order to solve the reliability problem caused by the increase of the rigidity of the elastic member, the elastic member is changed in design, which causes other defects such as an increase of the non-moving direction displacement, the swing, and the like to the performance of the linear vibration motor.
Therefore, it is necessary to provide a new linear vibration motor to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a linear vibrating motor that vibration performance is good and the reliability is high.
In order to solve the above technical problem, the present invention provides a linear vibration motor, which includes a housing having an accommodating space, a vibrator disposed in the accommodating space, an elastic member suspending the vibrator in the accommodating space, and a coil assembly and a magnetic spring member fixed to the housing for driving the vibrator to move; the vibrator comprises a magnetic circuit system, the magnetic circuit system comprises a first magnetic steel and a second magnetic steel which are respectively arranged at two opposite sides of the coil assembly along the motion direction of the vibrator, the first magnetic steel and the second magnetic steel are magnetized along the motion direction of the vibrator, the magnetic poles of the opposite surfaces of the first magnetic steel and the second magnetic steel are the same, the magnetic spring part is a magnetic steel and is magnetized along the motion direction of the vibrator, the magnetic spring part comprises a first magnetic spring part and a second magnetic spring part which are arranged at two opposite sides of the coil assembly along the motion direction of the vibrator, and the magnetic poles of the first magnetic spring part and the second magnetic spring part face the vibrator are opposite to the magnetic poles of the opposite surfaces of the first magnetic steel and the second magnetic steel.
Preferably, the magnetic spring part is annular magnetic steel arranged on two opposite sides of the coil assembly along the motion direction of the vibrator, and the annular magnetic steel surrounds the vibrator.
Preferably, the magnetic spring part further comprises a third magnetic spring part and a fourth magnetic spring part which are arranged on the two opposite sides of the coil assembly in the motion direction of the vibrator, the third magnetic spring part and the first magnetic spring part are respectively arranged on the two opposite sides of the vibrator, the fourth magnetic spring part and the second magnetic spring part are respectively arranged on the two opposite sides of the vibrator, the third magnetic spring part and the fourth magnetic spring part are magnetic steels and are perpendicular to the motion direction of the vibrator, the third magnetic spring part and the fourth magnetic spring part face the magnetic poles of the vibrator are opposite to the magnetic poles of the opposite surfaces of the first magnetic steel and the second magnetic steel.
Preferably, the housing includes a bottom plate and an upper cover covering the bottom plate and enclosing the receiving space together with the bottom plate, the first magnetic spring element and the second magnetic spring element are fixed to the bottom plate respectively, and the third magnetic spring element and the fourth magnetic spring element are fixed to the upper cover.
Preferably, the magnetic circuit system further comprises a third magnetic steel and a fourth magnetic steel which are respectively arranged on two opposite sides of the coil assembly in the direction perpendicular to the motion direction of the vibrator, the third magnetic steel and the fourth magnetic steel are magnetized in the direction perpendicular to the motion direction of the vibrator, the magnetic poles of the opposite surfaces of the third magnetic steel and the fourth magnetic steel are the same, and the magnetic poles of the opposite surfaces of the third magnetic steel and the fourth magnetic steel are opposite to the magnetic poles of the opposite surfaces of the first magnetic steel and the second magnetic steel.
Preferably, the vibrator further comprises a mass block with a through hole and a magnetic frame which is fixed on the inner wall of the through hole and is annular, the first magnetic steel and the second magnetic steel are respectively fixed on two opposite sides of the magnetic frame, the third magnetic steel and the fourth magnetic steel are respectively fixed on two other opposite sides of the magnetic frame, and the coil assembly extends into the through hole and is arranged at an interval with the magnetic circuit system.
Preferably, the coil assembly is including being fixed in the metal component of casing with around locating the coil of metal component, the metal component include the iron core with respectively by the iron core is followed two magnetic shoes that the relative both ends of the direction of motion of oscillator extend, the coil is around locating the iron core, the magnetic shoe is fixed in the casing, two the magnetic shoe respectively with first magnet steel with the second magnet steel is just to setting up.
Preferably, the number of the elastic members is two, and the two elastic members are respectively arranged on two opposite sides of the vibrator along the movement direction of the vibrator.
Compared with the prior art, the linear vibration motor of the utility model is provided with the first magnetic steel and the second magnetic steel which are magnetized along the motion direction of the vibrator, wherein the magnetic poles of the opposite surfaces of the first magnetic steel and the second magnetic steel are the same; the magnetic spring piece is fixed on the shell, wherein the magnetic spring piece is magnetic steel and perpendicular to the motion direction of the vibrator, the magnetic spring piece comprises a first magnetic spring piece and a second magnetic spring piece, the first magnetic spring piece and the second magnetic spring piece are arranged on two opposite sides of the coil assembly along the motion direction of the vibrator, and the magnetic poles of the first magnetic spring piece and the second magnetic spring piece facing the vibrator are opposite to the magnetic poles of the opposite faces of the first magnetic steel and the second magnetic steel. The structure enables the magnetic repulsion force formed by the magnetic spring piece and the magnetic circuit system to enable the first magnetic steel and the second magnetic steel to have positive rigidity so as to overcome negative rigidity brought by an iron core and a magnetic shoe in the related technology, and further reduce the rigidity requirement on the design of the elastic piece, thereby improving the reliability. In addition, the magnetic spring piece and the elastic piece support the vibrator together, which is also beneficial to the stability of the linear vibration motor, thereby improving the reliability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a three-dimensional structural view of a linear vibration motor according to the present invention;
fig. 2 is a partial structural view of the linear vibration motor of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 1;
FIG. 4 is a partial structural assembly view of the linear vibration motor with the casing removed according to the present invention
Fig. 5 is an assembly view of a partial three-dimensional structure of the magnetic spring member, the mass-removed vibrator, and the coil assembly of the linear vibration motor of the present invention;
fig. 6 is a sectional view taken along line B-B in fig. 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 to 6, the present invention provides a linear vibration motor 100, wherein the linear vibration motor 100 includes a housing 1 having an accommodating space 10, a vibrator 2, an elastic member 3, a coil assembly 4, and a magnetic spring member 5.
The housing 1 has a receiving space 10. Specifically, the housing 1 includes a bottom plate 11 and an upper cover 12 covering the bottom plate 11 and enclosing the accommodating space 10 together with the bottom plate 11.
The vibrator 2 is disposed in the housing space 10. The vibrator 2 is supported and suspended in the accommodating space 10 through the elastic piece 3. Specifically, the vibrator 2 includes a magnetic circuit system 21, a mass 22, and a magnetic frame 23.
The magnetic circuit system 21 includes a first magnetic steel 211, a second magnetic steel 212, a third magnetic steel 213, and a fourth magnetic steel 214.
The first magnetic steel 211 and the second magnetic steel 212 are respectively arranged on two opposite sides of the coil assembly 4 along the motion direction of the oscillator 2. In this embodiment, the first magnetic steel 211 and the second magnetic steel 212 are fixed to the two second side walls 232, respectively. The first magnetic steel 211 and the second magnetic steel 212 are magnetized along the motion direction of the oscillator 2, and the magnetic poles of the opposite surfaces of the first magnetic steel 211 and the second magnetic steel 212 are the same. The first magnetic steel 211 and the second magnetic steel 212 form an electromagnetic attraction force to drive the linear vibration motor 100 when being electrified with the coil assembly 4, respectively.
The third magnetic steel 213 and the fourth magnetic steel 214 are respectively disposed on two opposite sides of the coil assembly 4 in a direction perpendicular to the movement direction of the vibrator 2. In this embodiment, the third magnetic steel 213 and the fourth magnetic steel 214 are fixed to the two first side walls 231, respectively. Third magnet steel 213 with fourth magnet steel 214 is along the perpendicular to the direction of motion of oscillator 2 magnetizes, just third magnet steel 213 with the magnetic pole of fourth magnet steel 214 opposite face is the same just third magnet steel 213 with the magnetic pole of fourth magnet steel 214 opposite face with first magnet steel 211 with the magnetic pole of second magnet steel 212 opposite face is opposite. The third magnetic steel 213 and the fourth magnetic steel 214 respectively form a lorentz force when being electrified with the coil assembly 4 to drive the linear vibration motor 100.
The mass block 22 is used for increasing the weight of the vibrator 2 to ensure the strength of vibration. The mass 22 has a through hole 20.
The magnetic frame 23 is annular. The magnetic frame 23 is embedded in the mass block 21. Specifically, the magnetic frame 23 is fixed to the inner wall of the through hole 20. In the present embodiment, the magnetic frame 23 includes two first sidewalls 231 disposed parallel to the moving direction of the vibrator 2 and spaced apart from each other, and two second sidewalls 232 disposed perpendicular to the moving direction and spaced apart from each other. The two first side walls 231 and the two second side walls 232 are fixed on the inner wall of the through hole 20. In this embodiment, the first magnetic steel 211 and the second magnetic steel 212 are respectively fixed to two opposite sides of the magnetic frame 23, and the third magnetic steel 213 and the fourth magnetic steel 214 are respectively fixed to the other two opposite sides of the magnetic frame 23.
The elastic member 3 suspends the vibrator 2 in the housing space 10. That is, one end of the elastic element 3 is fixed to the vibrator 2, and the other end is fixed to the housing 1, specifically, the upper cover 12 of the housing 1. In this embodiment, the elastic members 3 include two elastic members 3, and the two elastic members 3 are respectively disposed on two opposite sides of the vibrator 2 along the movement direction of the vibrator 2. The arrangement of the dual-elastic member structure can make the vibration effect of the linear vibration motor 100 more balanced and the reliability better.
The coil block 4 is fixed to the housing 1. The coil assembly 4 extends into the through hole 20 and is spaced apart from the magnetic circuit system 21. Specifically, the coil assembly 4 is wound around the outer side of the magnetic circuit system 21 and is spaced apart from the magnetic circuit system 21. The coil assembly 4 extends to a position between the first magnetic steel 211 and the second magnetic steel 212 and is arranged at intervals with the first magnetic steel 211 and the second magnetic steel 212 respectively; meanwhile, the coil assembly 4 extends to a space between the third magnetic steel 213 and the fourth magnetic steel 214 and is respectively arranged at intervals with the third magnetic steel 213 and the fourth magnetic steel 214. The coil assembly 4 is used for driving the vibrator 2 to vibrate. Specifically, the coil block 4 includes a metal member 41 fixed to the housing 1 and a coil 42 wound around the metal member 41.
The metal member 41 includes an iron core 4111 and two magnetic shoes 412 respectively extended from opposite ends of the iron core 4111 in the moving direction of the vibrator 2.
The coil 42 extends into the through hole 20 and is spaced apart from the magnetic circuit system 21 for driving the vibrator 2 to vibrate. The coil 42 is wound around the iron core 4111, the magnetic shoes 412 are fixed to the housing 1, and the two magnetic shoes 412 are respectively opposite to the first magnetic steel 211 and the second magnetic steel 212. That is, the first magnetic steel 211 and the second magnetic steel 212 are respectively disposed on opposite sides of the coil 42 along the moving direction of the vibrator 2. The magnetic shoe 412 is fixed to the housing 1. In the present embodiment, the coil block 4 is specifically fixed to the base plate 11. After the coil 42 is energized, the iron core 411 forms a magnetic field and interacts with the magnetic fields of the first magnetic steel 211 and the second magnetic steel 212 to form an electromagnetic attraction force; and the coil 42 forms lorentz forces with the third magnetic steel 213 and the fourth magnetic steel 214, respectively. The electromagnetic attraction force and the Lorentz force jointly form a driving force, so that the vibrator 2 is driven to do reciprocating linear motion, and a vibration effect is generated. Wherein the driving force is suction and is defined as F2, i.e. has a negative stiffness, which is defined as K2.
The magnetic spring member 5 is fixed to the housing 1. The magnetic spring piece 5 and the vibrator 2 are arranged at intervals.
In the present embodiment, the magnetic spring member 5 is magnetic steel. The magnetic spring piece 5 is magnetized along the direction perpendicular to the motion direction of the vibrator 2. Of course, without being limited thereto, the magnetic spring member 5 may also be an annular magnetic steel disposed on opposite sides of the coil assembly 4 in the moving direction of the vibrator 2. The annular magnetic steel is arranged around the oscillator 2.
The magnetic force between the magnetic spring member 5 and the magnetic circuit system 21 provides a restoring force to the vibrator 2.
The magnetic spring member 5 includes a first magnetic spring member 51 and a second magnetic spring member 52 provided on opposite sides of the coil block 4 in the moving direction of the vibrator 2. In the present embodiment, the first magnetic spring element 51 and the second magnetic spring element 52 are fixed to the bottom plate 11. The first magnetic spring piece 51 and the second magnetic spring piece 52 are both magnetic steels and are magnetized along a direction perpendicular to the motion direction of the vibrator 2. The magnetic pole of the magnetic spring piece 5 facing the vibrator 2 is opposite to the magnetic pole of the opposite surface of the first magnetic steel 211 and the second magnetic steel 212. The magnetic poles of the first magnetic spring element 51 and the second magnetic spring element 52 facing the vibrator 2 are opposite to the magnetic poles of the opposite surfaces of the first magnetic steel 211 and the second magnetic steel 212, and the magnetic acting forces between the first magnetic spring element 51 and the second magnetic spring element 52 and the magnetic circuit system 21 respectively provide restoring force for the vibrator 2.
In the present embodiment, in order to provide a restoring force to the vibrator 2, the magnetic force between the magnetic spring member 5 and the magnetic circuit system 21 is preferably balanced. The magnetic spring member 5 includes a third magnetic spring member 53 and a fourth magnetic spring member 54 provided on opposite sides of the coil block 4 in the moving direction of the vibrator 2. The third magnetic spring member 53 and the fourth magnetic spring member 54 are fixed to the upper cover 12. The third magnetic spring piece 53 and the first magnetic spring piece 51 are respectively arranged on two opposite sides of the vibrator 2, the fourth magnetic spring piece 54 and the second magnetic spring piece 52 are respectively arranged on two opposite sides of the vibrator 2, the third magnetic spring piece 53 and the fourth magnetic spring piece 54 are both magnetic steel and are magnetized along a direction perpendicular to the motion direction of the vibrator 2, and the magnetic poles of the third magnetic spring piece 53 and the fourth magnetic spring piece 54 facing the vibrator 2 are opposite to the magnetic poles of the opposite faces of the first magnetic steel 211 and the second magnetic steel 212.
In the present embodiment, as shown in fig. 6, the magnetic poles of the first magnetic spring element 51 and the second magnetic spring element 52 facing the transducer 2 are each S. The magnetic poles of the opposite faces of the first magnetic steel 211 and the second magnetic steel 212 are N. The magnetic pole of the first magnetic steel 211 far away from the coil 42 is S. This arrangement causes the first magnetic spring 51 and the second magnetic spring 52 to generate the repulsive force F1 that the same magnetic pole as the first magnetic steel 211 repels.
The magnetic poles of the third magnetic spring member 53 and the fourth magnetic spring member 54 facing the vibrator 2 are S, respectively. The magnetic poles of the opposite faces of the first magnetic steel 211 and the second magnetic steel 212 are N. The magnetic pole of the second magnetic steel 212 far away from the coil 42 is S. This arrangement causes the third magnetic spring member 53 and the fourth magnetic spring member 54 to generate a repulsive force F1 in which the same magnetic poles repel each other with respect to the second magnetic steel 212. The arrangement of the structure can ensure that the magnetic spring part 5, the first magnetic steel 211 and the second magnetic steel 212 form more balance of repulsive force, and the reliability is better.
That is, the magnetic spring member 5 forms a repulsive force with the first magnetic steel 211 and the second magnetic steel 212, which is defined as F1, i.e., has a supporting rigidity, which is defined as K1. Specifically, this arrangement causes the first magnetic steel 211 and the second magnetic steel 212 to generate a repulsive force F1 in which the same magnetic poles repel each other.
The supporting rigidity of the elastic member 3 to the vibrator 2 is defined as K3. Defining the total stiffness of the linear vibration motor 100 as K, then:
K＝K1-K2+K3 (1)。
k3 ═ K + K2-K1 (2) is obtained.
As is apparent from the formula (2), for a certain total stiffness K, it is apparent that the supporting stiffness K3 of the elastic member 3 is lowered due to the supporting stiffness K1 of the magnetic spring member 5, so that the stress of the elastic member 3 is reduced, and the reliability of the elastic member 3 is improved, thereby increasing the reliability of the linear vibration motor 100.
In summary, the magnetic spring member 5 and the elastic member 3 support the vibrator 2 together, which is also advantageous for the stability of the linear vibration motor 100, thereby improving reliability.
Compared with the prior art, the linear vibration motor of the utility model is provided with the first magnetic steel and the second magnetic steel which are magnetized along the motion direction of the vibrator, wherein the magnetic poles of the opposite surfaces of the first magnetic steel and the second magnetic steel are the same; the magnetic spring piece is fixed on the shell, wherein the magnetic spring piece is magnetic steel and perpendicular to the motion direction of the vibrator, the magnetic spring piece comprises a first magnetic spring piece and a second magnetic spring piece, the first magnetic spring piece and the second magnetic spring piece are arranged on two opposite sides of the coil assembly along the motion direction of the vibrator, and the magnetic poles of the first magnetic spring piece and the second magnetic spring piece facing the vibrator are opposite to the magnetic poles of the opposite faces of the first magnetic steel and the second magnetic steel. The structure enables the magnetic repulsion force formed by the magnetic spring piece and the magnetic circuit system to enable the first magnetic steel and the second magnetic steel to have positive rigidity so as to overcome negative rigidity brought by an iron core and a magnetic shoe in the related technology, and further reduce the rigidity requirement on the design of the elastic piece, thereby improving the reliability. In addition, the magnetic spring piece and the elastic piece support the vibrator together, which is also beneficial to the stability of the linear vibration motor, thereby improving the reliability.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.
Claims (8)
1. A linear vibration motor comprises a shell with an accommodating space, a vibrator arranged in the accommodating space, an elastic piece for suspending the vibrator in the accommodating space, and a coil component fixed on the shell and used for driving the vibrator to move; the vibrator comprises a magnetic circuit system, the magnetic circuit system comprises a first magnetic steel and a second magnetic steel which are respectively arranged at two opposite sides of the coil component along the motion direction of the vibrator, the first magnetic steel and the second magnetic steel are magnetized along the motion direction of the vibrator, and the magnetic poles of the opposite surfaces of the first magnetic steel and the second magnetic steel are the same, it is characterized in that the linear vibration motor also comprises a magnetic spring piece fixed on the shell, the magnetic spring piece is magnetic steel and is magnetized along the direction vertical to the motion direction of the vibrator, the magnetic spring part comprises a first magnetic spring part and a second magnetic spring part which are arranged on the two opposite sides of the coil component along the motion direction of the vibrator, the first magnetic spring piece and the second magnetic spring piece face the magnetic poles of the vibrators, and the magnetic poles of the opposite faces of the first magnetic steel and the second magnetic steel are opposite.
2. The linear vibration motor according to claim 1, wherein the magnetic spring member is an annular magnetic steel provided on opposite sides of the coil block in a movement direction of the vibrator, the annular magnetic steel being provided around the vibrator.
3. The linear vibration motor according to claim 1, wherein the magnetic spring member further includes a third magnetic spring member and a fourth magnetic spring member disposed on opposite sides of the coil assembly in a movement direction of the vibrator, the third magnetic spring member and the first magnetic spring member are respectively disposed on opposite sides of the vibrator, the fourth magnetic spring member and the second magnetic spring member are respectively disposed on opposite sides of the vibrator, the third magnetic spring member and the fourth magnetic spring member are magnetized in a direction perpendicular to the movement direction of the vibrator, and magnetic poles of the third magnetic spring member and the fourth magnetic spring member facing the vibrator are opposite to magnetic poles of opposite sides of the first magnetic steel and the second magnetic steel.
4. The linear vibration motor according to claim 3, wherein the housing includes a bottom plate and an upper cover covering the bottom plate and enclosing the receiving space together with the bottom plate, the first magnetic spring element and the second magnetic spring element are fixed to the bottom plate, respectively, and the third magnetic spring element and the fourth magnetic spring element are fixed to the upper cover.
5. The linear vibration motor of claim 1, wherein the magnetic circuit system further includes a third magnetic steel and a fourth magnetic steel respectively disposed on opposite sides of the coil assembly along a direction perpendicular to a movement direction of the vibrator, the third magnetic steel and the fourth magnetic steel are magnetized along the direction perpendicular to the movement direction of the vibrator, magnetic poles of opposite surfaces of the third magnetic steel and the fourth magnetic steel are the same, and magnetic poles of opposite surfaces of the third magnetic steel and the fourth magnetic steel are opposite to magnetic poles of opposite surfaces of the first magnetic steel and the second magnetic steel.
6. The linear vibration motor of claim 5, wherein the vibrator further includes a mass block having a through hole and a ring-shaped magnetic frame fixed to an inner wall of the through hole, the first magnetic steel and the second magnetic steel are respectively fixed to opposite sides of the magnetic frame, the third magnetic steel and the fourth magnetic steel are respectively fixed to the other opposite sides of the magnetic frame, and the coil assembly extends into the through hole and is spaced apart from the magnetic circuit system.
7. The linear vibration motor according to claim 1, wherein the coil assembly includes a metal member fixed to the housing and a coil wound around the metal member, the metal member includes an iron core and two magnetic shoes respectively extending from opposite ends of the iron core in a movement direction of the vibrator, the coil is wound around the iron core, the magnetic shoes are fixed to the housing, and the two magnetic shoes are respectively disposed opposite to the first magnetic steel and the second magnetic steel.
8. The linear vibration motor of claim 1, wherein the elastic member includes two, and the two elastic members are respectively disposed at opposite sides of the vibrator along a movement direction of the vibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922245797.2U CN211321179U (en) | 2019-12-14 | 2019-12-14 | Linear vibration motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922245797.2U CN211321179U (en) | 2019-12-14 | 2019-12-14 | Linear vibration motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211321179U true CN211321179U (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922245797.2U Expired - Fee Related CN211321179U (en) | 2019-12-14 | 2019-12-14 | Linear vibration motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211321179U (en) |
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2019
- 2019-12-14 CN CN201922245797.2U patent/CN211321179U/en not_active Expired - Fee Related
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Granted publication date: 20200821 |