CN112671200A - Linear vibration motor - Google Patents
Linear vibration motor Download PDFInfo
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- CN112671200A CN112671200A CN202011483065.8A CN202011483065A CN112671200A CN 112671200 A CN112671200 A CN 112671200A CN 202011483065 A CN202011483065 A CN 202011483065A CN 112671200 A CN112671200 A CN 112671200A
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- 238000005452 bending Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 4
- 241000463219 Epitheca Species 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 238000013016 damping Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000004044 response Effects 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract description 2
- 239000012634 fragment Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention discloses a linear vibration motor including: a stator component; a vibrator part received in the stator part and linearly vibrated in the stator part; the elastic part is contained in the stator part and comprises an elastic sheet and a vibrating diaphragm, the elastic sheet is connected with the stator part and the vibrator part, and the vibrating diaphragm is compounded on the elastic sheet to elastically support the vibrator part together with the elastic sheet. Compared with the traditional single elastic sheet, the composite elastic sheet structure formed by compounding the elastic sheet and the vibrating diaphragm is adopted, the damping effect of the vibrating diaphragm is good, the damping effect of the composite elastic sheet structure is improved, a large change space can be provided, large restoring force is provided, the descending time of the vibrator part is shortened, the response is fast, the vibration sense change of the linear vibration motor is small, the linear vibration effect is ensured, meanwhile, the stopping time of the elastic part is greatly reduced, and the performance of the linear vibration motor is optimized.
Description
Technical Field
The invention relates to the technical field of electronic equipment, in particular to a linear vibration motor.
Background
With the continuous development of the intelligent interaction field, the linear vibration motor or the motor is more and more widely used. The linear vibration motor with novel and reliable performance becomes a priority for more large-scale terminal enterprises. The traditional Z-direction linear vibration motor generally adopts a single elastic sheet design, the damping effect of the elastic sheet is poor, the change space is small, the response is slow, the vibration sense change is large, the nonlinearity is serious, and the performance of the linear vibration motor is influenced.
Disclosure of Invention
The invention mainly aims to provide a linear vibration motor, and aims to solve the problem that in the prior art, an elastic sheet in the linear vibration motor is poor in damping effect.
To achieve the above object, the present invention provides a linear vibration motor including:
a stator component;
a vibrator part received in the stator part and linearly vibrated in the stator part;
the elastic part is contained in the stator part and comprises an elastic sheet and a vibrating diaphragm, the elastic sheet is connected with the stator part and the vibrator part, and the vibrating diaphragm is compounded on the elastic sheet to elastically support the vibrator part together with the elastic sheet.
Preferably, the stator part comprises a housing and a coil disposed in the housing, the vibrator part and the elastic part being accommodated in the housing;
the vibrator part comprises a magnet and a magnet yoke, the coil faces the magnet to generate electromagnetic force for enabling the vibrator part to vibrate linearly, the magnet yoke covers the magnet and is connected with the magnet, and the elastic sheet is connected with the magnet yoke and the shell.
Preferably, the vibrating diaphragm covers the upper part or the lower part of the elastic sheet; the vibrating diaphragm is connected to the elastic sheet, or the vibrating diaphragm is connected to the magnetic yoke and the shell, or one side of the vibrating diaphragm is connected to the elastic sheet, and the other side of the vibrating diaphragm is connected to the magnetic yoke or the shell.
Preferably, the elastic sheet is annular and surrounds the periphery of the coil, the inner edge of the elastic sheet is connected with the magnet yoke, and the outer edge of the elastic sheet is connected with the shell.
Preferably, the diaphragm is annular and surrounds the periphery of the coil;
the inner edge of the diaphragm is connected with the inner edge of the elastic sheet or the magnet yoke, and the outer edge of the diaphragm is connected with the outer edge of the elastic sheet or the shell.
Preferably, a flange structure is formed at the edge of the magnetic yoke, and the inner edge of the elastic piece and/or the inner edge of the diaphragm are connected with the flange structure.
Preferably, the diaphragm includes a first connecting portion, an elastic bending portion and a second connecting portion sequentially connected from inside to outside, the first connecting portion is connected to the inner edge of the elastic piece or the magnetic yoke, the second connecting portion is connected to the outer edge of the elastic piece or the housing, and the elastic bending portion generates an elastic force to elastically support the vibrator part together with the elastic piece.
Preferably, the shell is provided with a positioning hole, the outer edge of the elastic sheet is provided with a positioning block, and the positioning block is inserted into the positioning hole.
Preferably, the housing comprises:
the upper shell comprises a top wall and an upper side wall surrounding the periphery of the top wall, the magnet yoke and the top wall are arranged at intervals, and the positioning hole is formed in the upper side wall;
the inferior valve, the inferior valve is located the below of epitheca, the inferior valve includes the diapire and encloses to be located the lower lateral wall of diapire periphery, go up the lateral wall with lower lateral wall connects, the coil is installed on the diapire.
Preferably, a positioning protrusion matched with the positioning hole is arranged on the lower side wall at a position corresponding to the positioning hole, and the positioning protrusion extends into the positioning hole to form a gap for inserting the positioning block.
Preferably, the top wall and the bottom wall are both provided with vent holes.
Preferably, the stator part further comprises a circuit board mounted on the bottom wall, the coil being connected to an external circuit through the circuit board.
Preferably, the vibrator part further includes a mass block, the mass block is enclosed at the periphery of the yoke and connected to the yoke.
Preferably, the elastic sheet is a metal elastic sheet; and/or the elastic sheet is a spiral elastic sheet or a cantilever elastic sheet.
In the technical scheme of the invention, the elastic sheet in the elastic component is connected with the stator component and the vibrator component, and the elastic sheet can not only support the vibrator component, but also provide restoring force for the vibrator component. The elastic sheet is compounded with a vibrating diaphragm to form a composite elastic sheet, and the elastic sheet and the vibrating diaphragm can elastically support the linear vibration of the vibrator component together. Compared with the traditional single elastic sheet, the composite elastic sheet structure formed by compounding the elastic sheet and the vibrating diaphragm is adopted, the damping effect of the vibrating diaphragm is good, the damping effect of the composite elastic sheet structure is improved, a large change space can be provided, large restoring force is provided, the descending time of the vibrator part is shortened, the response is fast, the vibration sense change of the linear vibration motor is small, the linear vibration effect is ensured, meanwhile, the stopping time of the elastic part is greatly reduced, and the performance of the linear vibration motor is optimized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 according to the structures shown in the drawings without creative efforts.
Fig. 1 is an assembly view of a linear vibration motor according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a linear vibration motor according to an embodiment of the present invention;
fig. 3 is an exploded view of a linear vibration motor according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional perspective view of a linear vibration motor according to an embodiment of the present invention;
fig. 5 is an exploded view of a linear vibration motor according to an embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a linear vibration motor.
As shown in fig. 1 to 5, the linear vibration motor 100 of the present embodiment includes a stator part 10, a vibrator part 20, and an elastic part 30, wherein the vibrator part 20 is accommodated in the stator part 10 and linearly vibrates within the stator part 10; the elastic member 30 is accommodated in the stator member 10, the elastic member 30 includes a spring plate 31 and a diaphragm 32, the spring plate 31 connects the stator member 10 and the vibrator member 20, and the diaphragm 32 is combined with the spring plate 31 to elastically support the vibrator member 20 together with the spring plate 31.
The stator part 10 of the present embodiment may vibrate linearly up and down within the stator part 10, i.e. the vibrator part 20 vibrates linearly in the Z-direction within the stator part 10. The elastic sheet 31 of the elastic member 30 of the embodiment connects the stator member 10 and the vibrator member 20, and the elastic sheet 31 can support the vibrator member 20 and provide restoring force for the vibrator member 20. The elastic piece 31 of the present embodiment is combined with a diaphragm 32 to form a combined elastic piece 31, and the elastic piece 31 and the diaphragm 32 can jointly elastically support the vibrator component 20. Compare with traditional single shell fragment 31, this embodiment adopts shell fragment 31 and the compound combined type shell fragment 31 structure of vibrating diaphragm 32 complex, the damping of vibrating diaphragm 32 is effectual, thereby improve the damping effect of combined type shell fragment 31 structure, can provide great change space, and provide great restoring force, shorten the decay time of oscillator part 20, the response is fast, and make the sense of vibration of linear vibration motor 100 change for a short time, guarantee the linear vibration effect, and simultaneously, greatly reduced elastic component 30's off-time, optimize linear vibration motor 100's performance.
Specifically, the stator part 10 includes a case 11 and a coil 12 disposed in the case 11, and the vibrator part 20 and the elastic part 30 are accommodated in the case 11; the vibrator part 20 includes a magnet 21 and a yoke 22, the coil 12 faces the magnet 21 to generate an electromagnetic force for linearly vibrating the vibrator part 20, the yoke 22 covers the magnet 21 and is coupled to the magnet 21, and the spring plate 31 couples the yoke 22 and the case 11. The cavity in the shell 11 provides a vibration space and an accommodating space for the linear vibration of the vibrator part 20, the vibrator part 20 and the elastic part 30 are accommodated in the shell 11, and the shell 11 protects the vibrator part 20 and the elastic part 30, so that the structure is compact and reasonable.
The magnet 21 of the present embodiment is a permanent magnet, and the yoke 22 has magnetic permeability, allowing the magnetic force of the magnet 21 to be continuously induced and smoothly generated. The coil 12 faces the magnet 21, and the magnet 21 generates an electromagnetic force for linearly vibrating the vibrator part 20 by electromagnetic induction of the coil 12, thereby linearly vibrating the vibrator part 20. The elastic piece 31 connects the yoke 22 and the case 11, that is, the elastic piece 31 is connected with the vibrator part 20 through the yoke 22 and with the stator part 10 through the case 11 to support the vibrator part 20 and provide a restoring force.
Further, the diaphragm 32 covers the upper or lower part of the elastic sheet 31; the diaphragm 32 is connected to the elastic piece 31, or the diaphragm 32 is connected to the yoke 22 and the housing 11, or one side of the diaphragm 32 is connected to the elastic piece 31 and the other side is connected to the yoke 22 or the housing 11. The position relationship between the diaphragm 32 and the elastic sheet 31 can be flexibly adjusted according to actual conditions, and the diaphragm 32 can cover both the upper part of the elastic sheet 31 and the lower part of the elastic sheet 31.
In an embodiment, the diaphragm 32 may be connected to the elastic sheet 31 to form the composite elastic sheet 31 by being connected to the elastic sheet 31. In another embodiment, the diaphragm 32 is connected to the spring 31 in a similar manner, and the diaphragm 32 is connected to the yoke 22 and the housing 11, so that the diaphragm 32 is connected to the vibrator part 20 and the stator part 10 to support the vibrator part 20 and provide a restoring force. In yet another embodiment, one side of the diaphragm 32 may be connected to the spring plate 31, and the other side of the diaphragm 32 may be connected to the yoke 22 or the housing 11, that is, one side of the diaphragm 32 may be connected to the spring plate 31, and the other side of the diaphragm 32 may be connected to the vibrator part 20 or the stator part 10, so as to support the vibrator part 20 and provide a restoring force. The connection relationship between the diaphragm 32 and the spring plate 31, between the vibrator part 20 and between the stator part 10 can be flexibly set according to actual conditions, and diversified use requirements can be met.
As shown in fig. 1 to 5, the linear vibration motor 100 of the present embodiment has a circular structure as a whole. The elastic sheet 31 is annular and surrounds the periphery of the coil 12, the inner edge of the elastic sheet 31 is connected with the magnetic yoke 22, and the outer edge of the elastic sheet 31 is connected with the shell 11. It is understood that the coil 12 is hollow, the magnet 21 may extend into the coil 12, and the hollow structure of the coil 12 may provide a linear vibration space for the magnet 21. The yoke 22 has a box structure with an open lower end, covers the magnet 21, and an outer edge of the yoke 22 extends to an outer side of the coil 12. The elastic sheet 31 is of an annular structure and is arranged around the periphery of the coil 12 in a surrounding mode, namely, the middle of the elastic sheet 31 is also arranged in a hollow mode, the inner edge of the elastic sheet 31 is connected with the magnetic yoke 22, the outer edge of the elastic sheet 31 is connected with the shell 11, and therefore assembly of the elastic sheet 31, the vibrator part 20 and the stator part 10 is achieved.
Further, the diaphragm 32 is annular and surrounds the periphery of the coil 12; the inner edge of the diaphragm 32 is connected to the inner edge of the spring 31 or the yoke 22, and the outer edge of the diaphragm 32 is connected to the outer edge of the spring 31 or the housing 11. It is understood that the middle portion of the diaphragm 32 is also hollow, the inner edge of the diaphragm 32 is connected to the inner edge of the spring plate 31 or the yoke 22, and the outer edge of the diaphragm 32 is connected to the outer edge of the spring plate 31 or the housing 11, so as to assemble the elastic component 30, the vibrator component 20, and the stator component 10. Furthermore, the edge of the magnetic yoke 22 is formed with a flange structure 221, the flange structure 221 can be formed by folding the edge of the lower opening of the magnetic yoke 22 outwards, and the inner edge of the elastic sheet 31 and/or the inner edge of the diaphragm 32 are connected with the flange structure 221, which is favorable for assembly.
The diaphragm 32 of this embodiment includes a first connecting portion 321, an elastic bending portion 322, and a second connecting portion 323 sequentially connected from inside to outside, where the first connecting portion 321 is connected to an inner edge of the elastic sheet 31 or the yoke 22, and the second connecting portion 323 is connected to an outer edge of the elastic sheet 31 or the housing 11, so as to fix the diaphragm 32. The elastic bending part 322 generates an elastic force to elastically support the vibrator part 20 together with the elastic piece 31. The cross section of the elastic bending part 322 of the present embodiment is arched upward and/or downward, thereby generating an elastic force that can elastically support the vibrator part 20 together with the elastic piece 31.
In one embodiment, the diaphragm 32 may be an integral diaphragm without holes or hollow design. In another embodiment, the diaphragm 32 may further have an opening or a hollow design, and the size of the opening or the size of the hollow area may be flexibly adjusted according to actual conditions. In addition, the diaphragm 32 may be made of a material similar to that of the diaphragm 32 in an acoustic device, such as a speaker, or may have a membrane structure made of a material having resilience. In this embodiment, the material of the diaphragm 32 is not limited.
In this embodiment, the housing 11 is provided with the positioning hole 111, the positioning block 311 is disposed on the outer edge of the elastic sheet 31, the positioning block 311 is inserted into the positioning hole 111, and the positioning hole 111 and the positioning block 311 are matched to position the elastic sheet 31, so as to achieve accurate assembly between the elastic sheet 31 and the housing 11, and improve assembly efficiency.
Specifically, the housing 11 includes an upper case 13 and a lower case 14, wherein the upper case 13 includes a top wall 131 and an upper side wall 132 surrounding the periphery of the top wall 131, the yoke 22 is spaced apart from the top wall 131 to provide a vibration space for linear vibration of the vibrator part 20, and the positioning hole 111 is opened in the upper side wall 132 to fix the elastic piece 31 at a proper height by cooperating with the positioning block 311. The lower case 14 is located below the upper case 13, the lower case 14 includes a bottom wall 141 and a lower side wall 142 surrounding the bottom wall 141, the upper side wall 132 and the lower side wall 142 are connected to achieve assembly between the upper case 13 and the lower case 14, and the coil 12 is mounted on the bottom wall 141 to fix the coil 12 and the lower case 14, together constituting the stator part 10.
Furthermore, a positioning protrusion 143, which is matched with the positioning hole 111, is disposed on the lower sidewall 142 at a position corresponding to the positioning hole 111, and the positioning protrusion 143 extends into the positioning hole 111 and forms a gap for inserting the positioning block 311. When the upper case 13 and the lower case 14 are assembled, the upper case 13 and the lower case 14 can be accurately assembled by the engagement of the positioning protrusions 143 and the positioning holes 111. When the upper shell 13 and the lower shell 14 are matched with each other through the positioning protrusion 143 and the positioning hole 111, a gap for inserting the positioning block 311 of the elastic sheet 31 is formed in the positioning hole 111, which facilitates the assembly of the elastic sheet 31. The top wall 131 and the bottom wall 141 of the present embodiment are both provided with the vent hole 112, and the air flow generated in the linear vibration process of the vibrator part 20 can pass through the vent hole 112 to balance the pressure difference with the outside, and the damping effect of the elastic part 30 can be properly adjusted.
In this embodiment, the stator part 10 further comprises a circuit board 15, the circuit board 15 being mounted on the bottom wall 141, the coil 12 being connected to an external circuit via the circuit board 15. The circuit board 15 may be a Flexible Printed Circuit (FPC) mounted on the bottom wall 141, the coil 12 is conducted with the flexible printed circuit, and one end of the flexible printed circuit extends out of the housing 11 to be conducted with an external circuit, so as to achieve the conduction of the coil 12 with the external circuit.
The vibrator part 20 of the present embodiment further includes a mass 23, and the mass 23 is enclosed around the yoke 22 and connected to the yoke 22. As shown in fig. 2 to 5, the mass 23 has a hollow ring structure in the middle, the mass 23 surrounds the yoke 22 and is connected to the yoke 22, and the mass 23 adds a predetermined weight to the vibrator part 20 to facilitate linear vibration of the vibrator part 20.
The elastic sheet 31 of the present embodiment is a metal elastic sheet; and/or the spring plate 31 is a spiral spring plate or a cantilever spring plate. The metal elastic sheet can not only play a good supporting role for the vibrator part 20, but also provide large restoring force for the vibrator part 20, and is beneficial to the linear vibration of the vibrator part 20. The spiral spring plate or the cantilever spring plate has good elasticity and large amplitude, and further provides powerful conditions for linear vibration of the vibrator part 20.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (12)
1. A linear vibration motor, characterized by comprising:
a stator component;
a vibrator part received in the stator part and linearly vibrated in the stator part;
the elastic part is contained in the stator part and comprises an elastic sheet and a vibrating diaphragm, the elastic sheet is connected with the stator part and the vibrator part, and the vibrating diaphragm is compounded on the elastic sheet to elastically support the vibrator part together with the elastic sheet.
2. The linear vibration motor of claim 1,
the stator component comprises a shell and a coil arranged in the shell, and the vibrator component and the elastic component are accommodated in the shell;
the vibrator part comprises a magnet and a magnet yoke, the coil faces the magnet to generate electromagnetic force for enabling the vibrator part to vibrate linearly, the magnet yoke covers the magnet and is connected with the magnet, and the elastic sheet is connected with the magnet yoke and the shell.
3. The linear vibration motor of claim 2, wherein the diaphragm covers above or below the spring plate; the vibrating diaphragm is connected to the elastic sheet, or the vibrating diaphragm is connected to the magnetic yoke and the shell, or one side of the vibrating diaphragm is connected to the elastic sheet, and the other side of the vibrating diaphragm is connected to the magnetic yoke or the shell.
4. The linear vibration motor of claim 3, wherein the resilient plate is formed in a ring shape and surrounds the outer periphery of the coil, an inner edge of the resilient plate is connected to the yoke, and an outer edge of the resilient plate is connected to the housing.
5. The linear vibration motor of claim 4, wherein said diaphragm is ring-shaped and surrounds an outer periphery of said coil;
the inner edge of the diaphragm is connected with the inner edge of the elastic sheet or the magnet yoke, and the outer edge of the diaphragm is connected with the outer edge of the elastic sheet or the shell.
6. The linear vibration motor of claim 5, wherein a flange structure is formed at an edge of the yoke, and an inner edge of the elastic piece and/or an inner edge of the diaphragm are connected to the flange structure.
7. The linear vibration motor of claim 5, wherein the diaphragm includes a first connection portion, an elastic bending portion, and a second connection portion sequentially connected from inside to outside, the first connection portion is connected to an inner edge of the spring plate or the yoke, the second connection portion is connected to an outer edge of the spring plate or the housing, and the elastic bending portion generates an elastic force to elastically support the vibrator part together with the spring plate.
8. The linear vibration motor of claim 4, wherein the housing has a positioning hole, and a positioning block is disposed on an outer edge of the resilient plate and inserted into the positioning hole.
9. The linear vibration motor of claim 8, wherein the housing comprises:
the upper shell comprises a top wall and an upper side wall surrounding the periphery of the top wall, the magnet yoke and the top wall are arranged at intervals, and the positioning hole is formed in the upper side wall;
the inferior valve, the inferior valve is located the below of epitheca, the inferior valve includes the diapire and encloses to be located the lower lateral wall of diapire periphery, go up the lateral wall with lower lateral wall connects, the coil is installed on the diapire.
10. The linear vibration motor of claim 9, wherein a positioning protrusion is provided on the lower sidewall at a position corresponding to the positioning hole, the positioning protrusion engaging with the positioning hole, the positioning protrusion extending into the positioning hole and forming a gap for the positioning block to be inserted into.
11. The linear vibration motor of claim 9, wherein said top wall and said bottom wall are each vented.
12. The linear vibration motor according to any one of claims 1 to 11, wherein the spring plate is a metal spring plate; and/or the elastic sheet is a spiral elastic sheet or a cantilever elastic sheet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011483065.8A CN112671200A (en) | 2020-12-15 | 2020-12-15 | Linear vibration motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011483065.8A CN112671200A (en) | 2020-12-15 | 2020-12-15 | Linear vibration motor |
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| CN112671200A true CN112671200A (en) | 2021-04-16 |
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Application publication date: 20210416 |