CN215186389U - Linear vibration motor - Google Patents
Linear vibration motor Download PDFInfo
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- CN215186389U CN215186389U CN202121436789.7U CN202121436789U CN215186389U CN 215186389 U CN215186389 U CN 215186389U CN 202121436789 U CN202121436789 U CN 202121436789U CN 215186389 U CN215186389 U CN 215186389U
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- vibration
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- arm
- assembly
- arms
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs
Abstract
The utility model provides a linear vibration motor, which comprises a shell, a vibration component, a stator component and two elastic supporting pieces, wherein the vibration component, the stator component and the two elastic supporting pieces are accommodated in the shell; the elastic support comprises an elastic part; the elastic part comprises three elastic arms which are continuously bent in the vibration direction of the vibration component; the projections of the three elastic arms on the vibration direction of the vibration assembly are overlapped; at least two elastic arms in the three elastic arms are arranged in parallel; the elastic supporting piece further comprises a first fixing part and a second fixing part which are arranged along the vibration direction of the vibration component in an extending mode. The utility model discloses a to the improvement of elasticity support piece structure in the motor structure, can obtain better vibration effect, promoted the reliability and the life of product.
Description
Technical Field
The utility model relates to an electronic product technical field. And more particularly, to a linear vibration motor.
Background
With the development of communication technology, portable electronic products, such as mobile phones, handheld game consoles or handheld multimedia entertainment devices, have come into the lives of people. In these portable electronic products, a vibration motor is generally used for system feedback, such as incoming call prompt of a mobile phone, vibration feedback of a game machine, and the like.
Conventional linear vibration motors generally include a vibration assembly and an elastic support member housed in a housing. The elastic support is used for suspending the vibration component in the shell and is used for providing restoring force for the vibration component and supporting force suspended in the space. Aiming at the existing linear vibration motor, the elastic supporting part structure has higher stress, so that the existing linear vibration motor has poor vibration effect and can not well meet the requirements of people.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model provides a linear vibration motor through the improvement to elastic support piece structure in the motor structure, obtains better vibration effect, has promoted the reliability and the life of product.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a linear vibration motor, include:
the vibration component is accommodated in the shell, the stator component and two elastic supporting pieces are used for suspending the vibration component in the shell;
the elastic support comprises an elastic part;
the elastic part comprises three elastic arms which are continuously bent in the vibration direction of the vibration component;
the first elastic arm and the third elastic arm are positioned on two sides of the second elastic arm; the projections of the three elastic arms on the vibration direction of the vibration assembly are overlapped; at least two elastic arms in the three elastic arms are arranged in parallel;
the elastic supporting piece also comprises a first fixing part and a second fixing part which are arranged in an extending way along the vibration direction of the vibration component;
the first fixing part is fixedly connected to the end part of the first elastic arm;
the second fixing part is fixedly connected to the end part of the third elastic arm.
Furthermore, it is preferable that the two elastic supports are arranged in a central symmetry with respect to the center of the vibration assembly.
Furthermore, it is preferable that the elastic support is formed by continuously bending a sheet.
In addition, preferably, the end parts of two adjacent elastic arms are connected through a connecting arm; the first fixing part and the first elastic arm and the second fixing part and the third elastic arm are respectively connected and fixed through the bending arm.
Further, it is preferable that at least one of the three elastic arms includes a missing portion.
In addition, it is preferable that each of the three spring arms includes a missing part, and projections of the missing parts on the three spring arms in the vibration direction of the vibration component coincide or do not coincide.
Further, it is preferable that the extending direction of the first fixing portion and the extending direction of the second fixing portion are the same or different.
In addition, preferably, all be arranged in parallel between the three elastic arm.
Furthermore, it is preferable that the stator assembly includes a coil having an axial direction perpendicular to a vibration direction of the vibration assembly in a horizontal plane; the vibration component comprises a vibration cavity, and the coil is located in the vibration cavity.
Further, it is preferable that the vibration assembly includes:
two masses arranged in the direction of vibration of the vibration assembly, an
Two groups of magnetic circuit structures respectively positioned at two opposite sides of the coil;
the magnetic circuit structure comprises a magnetic group; the magnetic group is clamped and fixed between the two mass blocks;
and the two mass blocks and the two groups of magnetic circuit structures jointly enclose to form a cavity which is the vibration cavity.
The utility model has the advantages that:
the utility model discloses a structure to elastic support piece improves, and when the vibration subassembly vibrates, the stress that receives on the linking arm between the bullet arm tip can be by effectual dispersion to each bullet arm on, and then make full use of plays the elasticity of arm, for the vibration subassembly vibration provides better elastic support, improves the output of motor and shakes the sense for the motor can obtain better vibration effect, has promoted the reliability and the life of product. Compared with the prior art, the utility model discloses have lower elastic stress to and higher stress fatigue limit, the advantage is more obvious in the design of the bigger super narrow type product of aspect ratio. In addition, the utility model also has the advantages of simple structure, convenient assembly and low production cost.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is an assembly view of the present invention.
Fig. 2 is a cross-sectional view of the present invention.
Fig. 3 is a schematic view of the overall structure of the elastic supporting member of the present invention.
Fig. 4 is a top view of the elastic support member of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The utility model provides a linear vibration motor through the improvement to elastic support piece structure in the motor structure, obtains better vibration effect, has promoted the reliability and the life of product. As shown in conjunction with fig. 1 to 4, specifically, the linear vibration motor includes: the vibration generator comprises a shell 10, a vibration assembly 20 accommodated in the shell 10, a stator assembly 30 and two elastic supporting pieces 40 for suspending the vibration assembly 20 in the shell 10; the elastic support 40 includes an elastic portion 41; the elastic part 41 comprises three elastic arms which are continuously bent and formed in the vibration direction of the vibration component 20; the first elastic arm 411 and the third elastic arm 413 are located at two sides of the second elastic arm 412, and the projections of the three elastic arms on the vibration direction of the vibration assembly 20 are overlapped; at least two elastic arms in the three elastic arms are arranged in parallel; the elastic supporting member 40 further includes a first fixing portion 42 and a second fixing portion 43 extending along the vibration direction of the vibration assembly 20; the first fixing portion 42 is fixedly connected to the end of the first elastic arm 411; the second fixing portion 43 is fixedly connected to an end of the third elastic arm 413. In the present embodiment, the first fixing portion 42 is used to be combined and fixed with the housing 10; the second fixing portion 43 is used for combining and fixing with the vibration component 20; the first elastic arm 411 and the third elastic arm 413 extend from two ends of the second elastic arm 412 to opposite directions through the connecting arm 414.
Specifically, referring to fig. 4, in the present embodiment, the first elastic arm 411 and the second elastic arm 412 are disposed in parallel, an included angle formed between the first fixing portion 42 and the first elastic arm 411 is smaller than 90 degrees, the third elastic arm 413 and the second elastic arm 412 are disposed in a non-parallel state close to each other, and an included angle formed between the second fixing portion 43 and the third elastic arm 413 is substantially 90 degrees. It can be understood by those skilled in the art that when the third elastic arm and the second elastic arm are disposed in parallel, the first fixing portion and the second fixing portion are parallel, and the included angle formed between the first fixing portion and the first elastic arm may also be approximately 90 degrees. The overlapping of the projections of the three elastic arms in the vibration direction of the vibration assembly 20 is to illustrate that the three elastic arms are located on the same horizontal plane in the direction perpendicular to the vibration direction of the vibration assembly 20, and the three elastic arms are not limited to have the same structure.
It should be noted that, in the above description and limitation on the structure of the elastic supporting member 40, only with respect to the structural state of the elastic supporting member 40 when the vibration assembly 20 is in the non-vibration state, it can be understood by those skilled in the art that when the vibration assembly 20 vibrates, each elastic arm of the elastic supporting member 40 is elastically deformed in the vibration direction, so that the relative position and state between each elastic arm changes, but through the above limitation on the structural characteristics between each elastic arm of the elastic supporting member 40, when the vibration assembly 20 vibrates, the stress applied to the connecting arm 414 between the end portions of the elastic arms can be effectively dispersed to each elastic arm, so as to fully utilize the elasticity of the elastic arms, provide better elastic support for the vibration assembly 20, and improve the output vibration sense of the motor. Compared with the prior art, the elastic support 40 provided by the embodiment has lower elastic stress and higher stress fatigue limit, and has more obvious advantages in the design of ultra-narrow products with larger length-width ratio.
In one embodiment shown in fig. 1, the housing 10 includes a top wall 11, a bottom wall 12 disposed opposite to the top wall 11, and a side wall 13 connecting the top wall 11 and the bottom wall 12, the top wall 11, the bottom wall 12, and the side wall 13 enclose a receiving space, and the vibration assembly 20, the stator assembly 30, and the elastic support 40 are received in the receiving space. The side wall 13 includes the long limit that two parallel intervals set up and locate long limit both ends and connect two short sides on long limit, and long limit and short side can adopt integrated into one piece, also can adopt split type design and fixed connection. In this embodiment, the top wall 11 is integrally formed with the side wall 13, and the bottom wall 12 directly covers the side wall 13, so that the linear vibration motor can be conveniently assembled. The housing 10 provided in this embodiment may be made of a magnetic conductive material, or may be made of a non-magnetic conductive material, which is not limited by the present invention.
To ensure the balance of the vibration assembly 20 during vibration and to avoid polarization, in a specific embodiment, the two elastic supporting members 40 are disposed in a central symmetry with respect to the center of the vibration assembly 20.
In a specific embodiment, the elastic support member 40 is formed by continuously bending a single sheet. In this embodiment, the elastic supporting member 40 is an integrated structure, which has the advantages of better stress distribution, simpler manufacturing process and more convenient assembly.
Regarding the connection manner between the adjacent elastic arms and the connection manner between the elastic arms and the fixing portion, specifically, the ends of the adjacent two elastic arms are connected by a connecting arm 414; the first fixing portion 42 and the first elastic arm 411 and the second fixing portion 43 and the third elastic arm 413 are respectively connected and fixed by a bent arm 415.
In an alternative embodiment, at least one of the first elastic arm 411, the second elastic arm 412 and the third elastic arm 413 includes a missing portion 416. The missing part 416 is used to adjust the rigidity of the elastic arm, which can effectively reduce the rigidity of the elastic arm in the vibration direction, so that the elastic arm has greater compliance in the vibration direction, and under the condition of the same driving force, the elastic support 40 obtains greater vibration displacement in the vibration direction, and the vibration motor can achieve higher vibration feeling.
In a specific embodiment, each of the first elastic arm 411, the second elastic arm 412 and the third elastic arm 413 includes a missing part 416, and projections of the missing parts 416 on the three elastic arms in the vibration direction of the vibration assembly 20 are overlapped or not overlapped. The missing portion 416 effectively reduces the rigidity of the three spring arms in the vibration direction of the vibration assembly 20, and the forming positions and the sizes of the missing portions 416 on the three spring arms may be different.
In an alternative embodiment, the extending direction of the first fixing portion and the extending direction of the second fixing portion are the same or different. That is, the extending directions of the first fixing portion and the second fixing portion may extend toward the inside of the housing at the same time, or extend toward the outside of the housing at the same time, or one of the first fixing portion and the second fixing portion may extend toward the inside of the housing and the other may extend toward the outside of the housing. Specifically, as shown in fig. 4, the first fixing portion 42 extends toward the inside of the housing 10, and the second fixing portion 43 extends toward the inside of the housing 10.
In a specific embodiment, the first elastic arm, the second elastic arm and the third elastic arm are arranged in parallel. When the third elastic arm, the second elastic arm and the first elastic arm are arranged in parallel, the first fixing part can be parallel to the second fixing part, an included angle formed between the first fixing part and the first elastic arm is approximately 90 degrees, and an included angle formed between the second fixing part and the second elastic arm is approximately 90 degrees.
Vibration principle based on a linear vibration motor: the coil vibrates the vibration component through the driving force generated by the alternating current flowing through the flexible circuit board. In a specific embodiment, the stator assembly 30 includes a coil 31 having an axial direction perpendicular to the vibration direction of the vibration assembly 20 in a horizontal plane; the vibration assembly 20 includes a vibration chamber, and the coil 31 is located in the vibration chamber. Further, it also includes the flexible circuit board 32 fixed on the bottom wall 12, the coil 31 is combined on the flexible circuit board 32 and conducted with the flexible circuit board 32, and the axial direction of the coil 31 is perpendicular to the vibration direction of the vibration component 20, the electric connection board is pasted or buckled on the bottom wall 12, the linear vibration motor is conducted with the external circuit through the pad on the flexible circuit board 32.
In the present embodiment, the vibration assembly 20 includes: two masses 21 arranged along the vibration direction of the vibration assembly 20, and two sets of magnetic structures 22 respectively located at two opposite sides of the coil 31; the magnetic circuit structure 22 comprises a magnetic group 221; the magnetic group 221 is clamped and fixed between the two mass blocks 21; the two masses 21 and the two sets of magnetic structures 22 surround the coil 31; the cavity formed by the two masses 21 and the two sets of magnetic structures 22 together is the vibration cavity. Two elastic supporting members 40 are respectively fixed between the mass block 21 and the housing 10; and the coil 31 is located in a vibration cavity formed by two masses 21 and two sets of magnetic structures 22. The mass 21 is used to increase the inertia of the vibration assembly 20 to improve the vibration sensation. The magnetic circuit structures 22 are used for providing a magnetic field, the coil 31 is located in the magnetic fields of the two magnetic circuit structures 22, the magnetic circuit structures 22 and the coil 31 are matched with each other to drive the vibration assembly 20 to reciprocate to form vibration feedback of the electronic product, wherein the magnetic group 221 includes a central magnet and two side magnets located at two sides of the central magnet, the two side magnets have the same magnetic pole and are opposite to the magnetic pole of the central magnet so as to form a driving force with the coil 31 to drive the vibration assembly 20 to reciprocate, it should be noted that, in order to enhance the vibration inductance of the linear vibration motor and the vibration balance of the mass block 21, the mass block 21 may be made of high-density metal materials such as a tungsten steel block, a nickel steel block or a nickel-tungsten alloy, and the vibration force of the mass block 21 is increased, so that the vibration of the electronic product is stronger.
The utility model discloses at the in-process of concrete application, also can increase/reduce the magnet number of magnetism group 221 according to the needs of reality, for example, adopt and exceed more than three magnets and make up according to certain mode to set up corresponding coil 31 between two magnetism groups 221, with the effort between reinforcing magnetism group 221 and the coil 31, and then reinforcing linear vibration motor's the sense of shaking.
Furthermore, the magnetic structure 22 further includes a magnetic conductive plate 222 fixed to a side of the magnetic group 221 facing away from the coil 31; the magnetic conductive plate 222 at least covers the surface of the side of the magnetic group 221 away from the coil 31; the two magnetic conduction plates 222 are arranged in a central symmetry manner. The magnetic conductive plate 222 is used to correct the magnetic induction line, thereby enhancing the magnetic induction intensity on the coil 31 side. In this embodiment, the magnetic conductive plate 222 is made of a magnetic conductive material, and can perform a magnetic conductive function, avoid the outward scattering of the magnetic induction lines, strengthen the lorentz force, effectively increase the vibration force of the vibration assembly 20, and increase the vibration effect. Specifically, the magnetic conductive plate 222 at least covers a surface of the magnetic group 221 on a side away from the coil 31 to avoid scattering of magnetic induction lines. In order to improve the bonding strength between the magnetic group 221 and the mass block 21 and prolong the service life of the linear vibration motor, the magnetic conductive plate 222 covers the outer side wall 13 of the mass block 21 while ensuring to cover the outer side surface of the magnetic group 221. In this embodiment, as shown in fig. 1, the two magnetic conductive plates 222 are arranged in a central symmetry manner. In addition, the shape of the magnetic conductive plate 222 may be a plate-shaped structure, or may be another structure adapted to the magnetic assembly 221, and the present invention is not limited thereto as long as the parts capable of correcting the shape of the magnetic induction line and enhancing the magnetic induction intensity at the coil are described. In the present invention, the linear vibration motor may further include other structural members, which are not described herein again.
To sum up, the utility model discloses a to elastic support piece's institutional advancement, when the vibration subassembly vibrates, the stress that receives on the linking arm between the bullet arm tip can be by effectual dispersion to each bullet arm on, and then make full use of plays the elasticity of arm, for the vibration subassembly vibration provides better elastic support, improves the output of motor and shakes the sense, can make the motor obtain better vibration effect from this, has promoted the reliability and the life of product.
Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.
Claims (10)
1. A linear vibration motor comprises a shell, a vibration component, a stator component and two elastic supporting pieces, wherein the vibration component, the stator component and the two elastic supporting pieces are accommodated in the shell; it is characterized in that the preparation method is characterized in that,
the elastic support comprises an elastic part;
the elastic part comprises three elastic arms which are continuously bent in the vibration direction of the vibration component;
the first elastic arm and the third elastic arm are positioned on two sides of the second elastic arm; the projections of the three elastic arms on the vibration direction of the vibration assembly are overlapped; at least two elastic arms in the three elastic arms are arranged in parallel;
the elastic supporting piece also comprises a first fixing part and a second fixing part which are arranged in an extending way along the vibration direction of the vibration component;
the first fixing part is fixedly connected to the end part of the first elastic arm;
the second fixing part is fixedly connected to the end part of the third elastic arm.
2. The linear vibration motor of claim 1, wherein two elastic supporting members are disposed in central symmetry with respect to the center of the vibration assembly.
3. A linear vibration motor according to claim 1, wherein said elastic support member is formed by continuously bending a piece of sheet material.
4. The linear vibration motor of claim 1, wherein the ends of adjacent two elastic arms are connected by a connecting arm; the first fixing part and the first elastic arm and the second fixing part and the third elastic arm are respectively connected and fixed through the bending arm.
5. The linear vibration motor of claim 1, wherein at least one of the three elastic arms includes a missing portion.
6. The linear vibration motor of claim 1, wherein each of the three spring arms includes a missing portion, and projections of the missing portions of the three spring arms in the vibration direction of the vibration assembly coincide or do not coincide.
7. The linear vibration motor of claim 1, wherein the extending direction of the first fixing portion and the extending direction of the second fixing portion are the same or different.
8. The linear vibration motor of claim 1, wherein the three elastic arms are arranged in parallel.
9. The linear vibration motor of claim 1, wherein said stator assembly includes coils having an axial direction perpendicular to a vibration direction of said vibration assembly in a horizontal plane; the vibration component comprises a vibration cavity, and the coil is located in the vibration cavity.
10. The linear vibration motor of claim 9, wherein the vibration assembly comprises:
two masses arranged in the direction of vibration of the vibration assembly, an
Two groups of magnetic circuit structures respectively positioned at two opposite sides of the coil;
the magnetic circuit structure comprises a magnetic group; the magnetic group is clamped and fixed between the two mass blocks;
and the two mass blocks and the two groups of magnetic circuit structures jointly enclose to form a cavity which is the vibration cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121436789.7U CN215186389U (en) | 2021-06-25 | 2021-06-25 | Linear vibration motor |
| PCT/CN2021/129990 WO2022267307A1 (en) | 2021-06-25 | 2021-11-11 | Linear vibration motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121436789.7U CN215186389U (en) | 2021-06-25 | 2021-06-25 | Linear vibration motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215186389U true CN215186389U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121436789.7U Active CN215186389U (en) | 2021-06-25 | 2021-06-25 | Linear vibration motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN215186389U (en) |
| WO (1) | WO2022267307A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022267306A1 (en) * | 2021-06-25 | 2022-12-29 | 歌尔股份有限公司 | Linear vibrating motor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117081324B (en) * | 2023-10-12 | 2024-01-05 | 瑞声光电科技(常州)有限公司 | Vibration motor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101486029A (en) * | 2007-10-11 | 2009-07-22 | 西铁城电子股份有限公司 | Vibrator generator and manufacturing method therefor |
| KR101245449B1 (en) * | 2010-05-14 | 2013-03-19 | 엘지이노텍 주식회사 | Vibration motor |
| KR101796094B1 (en) * | 2010-09-01 | 2017-11-09 | 주식회사 이엠텍 | Horizental vibration motor |
| KR101583641B1 (en) * | 2014-08-07 | 2016-01-08 | (주)하이소닉 | Haptic actuator |
| CN205407551U (en) * | 2016-02-27 | 2016-07-27 | 歌尔声学股份有限公司 | Linear vibrating motor |
| KR101746090B1 (en) * | 2017-02-14 | 2017-06-20 | 주식회사 블루콤 | Horizontal Vibration Motor |
| JP2019134510A (en) * | 2018-01-29 | 2019-08-08 | 日本電産セイミツ株式会社 | Vibration motor |
-
2021
- 2021-06-25 CN CN202121436789.7U patent/CN215186389U/en active Active
- 2021-11-11 WO PCT/CN2021/129990 patent/WO2022267307A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022267306A1 (en) * | 2021-06-25 | 2022-12-29 | 歌尔股份有限公司 | Linear vibrating motor |
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| Publication number | Publication date |
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| WO2022267307A1 (en) | 2022-12-29 |
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