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WO2018095047A1 - Moteur à vibration linéaire - Google Patents

Moteur à vibration linéaire Download PDF

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Publication number
WO2018095047A1
WO2018095047A1 PCT/CN2017/092492 CN2017092492W WO2018095047A1 WO 2018095047 A1 WO2018095047 A1 WO 2018095047A1 CN 2017092492 W CN2017092492 W CN 2017092492W WO 2018095047 A1 WO2018095047 A1 WO 2018095047A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixed end
fixed
cantilever
connecting arm
mass
Prior art date
Application number
PCT/CN2017/092492
Other languages
English (en)
Chinese (zh)
Inventor
史德璋
朱跃光
Original Assignee
歌尔股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2018095047A1 publication Critical patent/WO2018095047A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/02—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs

Definitions

  • the present invention relates to the field of consumer electronics, and more particularly to a linear vibration motor.
  • micro-vibration motors are generally used for system feedback, such as incoming call prompts of mobile phones, vibration feedback of game machines, and the like.
  • system feedback such as incoming call prompts of mobile phones, vibration feedback of game machines, and the like.
  • various internal components also need to adapt to this trend, and micro-vibration motors are no exception.
  • the existing micro-vibration motor generally includes an upper cover, a lower cover that forms a vibration space with the upper cover, a vibrator (including a mass and a permanent magnet) that linearly reciprocates in the vibration space, connects the upper cover, and reciprocates the vibrator A vibrating elastic support and a coil located a distance below the vibrator.
  • a vibrator including a mass and a permanent magnet
  • the elastic support members are commonly used with springs or springs, vibration motors of different shapes and different performances, and the design of the shape and size of the springs or springs are also different.
  • the square or rectangular motor usually has the largest surface vibration, and the fulcrum pitch is large, and the elastic piece design is particularly important.
  • the single elastic piece or the double elastic piece structure has the rigidity of the elastic piece in the dimension other than the vibration direction, and the single support point is easy to appear three. Dimension deflection, double fulcrum is prone to two-dimensional rotation around the axis.
  • the current linear or rectangular Z/Y linear motor has a serious first-order natural frequency polarization problem due to the unreasonable structure of the elastic support member, and the vibration stability is poor, and the vibration deflection is prone to occur, resulting in collision noise.
  • an object of the present invention is to provide a linear vibration motor to solve the severe first-order natural frequency polarization problem of the linear vibration motor in the prior art, which has poor vibration stability, is prone to vibration deflection, and causes collision noise. .
  • the linear vibration motor provided by the present invention comprises a housing and a vibration component housed in the housing;
  • the vibration assembly includes a mass and an elastic support; the elastic support is disposed between the upper end surface of the mass and the inner surface of the top of the housing to suspend the mass in the housing through the elastic support; the elastic support is a sheet
  • the structure includes a first fixed end, a second fixed end, and a connecting arm disposed between the first fixed end and the second fixed end, and symmetrically distributed cantilevers are disposed on both sides of the connecting arm; the first fixed end and the second One of the fixed ends is fixed to the mass, and the other of the first fixed end and the second fixed end is fixed to the housing.
  • a preferred solution is that the two ends of the connecting arm are respectively connected with the first fixed end and the second fixed end; one end of the cantilever is connected with the first fixed end, and the other end of the cantilever is separated from the second fixed end; One end of the two fixed end phases is fixed to the casing or the mass corresponding to the second fixed end.
  • a preferred solution is that one end of the connecting arm is connected to the first fixed end, and the other end of the connecting arm is separated from the second fixed end; two ends of the cantilever are respectively respectively connected to the first fixed end and the second fixed end.
  • the connecting end of the connecting arm and the second fixed end is fixed to the housing or the mass corresponding to the second fixed end.
  • first fixed end, the second fixed end, the connecting arm, and the cantilever are integrally formed.
  • the connecting arm and the cantilever are disposed offset from each other when viewed from the side; and the effective arms of the connecting arm and the cantilever are equal in length so that the connecting arm during the movement of the mass The same amount of compression and deformation as the cantilever.
  • the connecting arm and the cantilever form a parallelogram as viewed from the side.
  • the vibration component further includes a magnetic circuit system fixed in the mass; the magnetic circuit system includes a basin frame fixedly connected to the mass, a magnet housed in the basin frame, and a magnet fixed away from the basin frame. The side of the Huashi.
  • a preferred solution further includes a stator assembly housed in the housing; wherein the stator assembly includes a flexible circuit board fixed in the housing, a coil fixed on the flexible circuit board; and a magnet formed between the sidewall of the basin frame The magnetic gap, the coil is suspended in the magnetic gap.
  • the housing includes an upper case and a lower case that are adapted to be connected, and the flexible circuit board is fastened or adhered to the inner side wall of the lower case.
  • the mass is a tungsten steel block, a nickel steel block or a tungsten-nickel alloy block.
  • the three-dimensional stiffness difference can be balanced, so that two vibration directions are removed.
  • the stiffness of the dimension is much larger than the stiffness in the vibration dimension, which can achieve the smooth vibration of the vibrating component, can effectively avoid the rotation of the fulcrum coaxially, improve the polarization and deflection of the square or rectangular Z-direction or Y-direction linear vibration motor, and reduce the rubbing, Improve noise; in addition, it is easy to assemble, saves vibration space, and improves the vibration experience of linear vibration motors.
  • FIG. 1 is an exploded view of a linear vibration motor in accordance with an embodiment of the present invention
  • Figure 2 is a cross-sectional view taken along line A of Figure 1;
  • Figure 3 is a cross-sectional view taken along line B of Figure 1;
  • 4-1 is an overall structural view of an elastic support member according to an embodiment of the present invention.
  • 4-2 is a top plan view of an elastic support member in accordance with an embodiment of the present invention.
  • 4-3 is a side view of an elastic support member in accordance with an embodiment of the present invention.
  • 5-1 is a structural view of an elastic support member according to another embodiment of the present invention.
  • Figure 5-2 is a structural view of an elastic support member according to still another embodiment of the present invention.
  • the reference numerals include: upper case 1, elastic support member 2, first fixed end 21, second fixed end 22, connecting arm 23, connecting arm fulcrum 231, cantilever 24, first cantilever 241, first cantilever fulcrum 2411
  • weights both of which refer to high quality, high density metal blocks that are fixed with vibration generating vibration blocks to enhance vibration balance.
  • the invention is mainly used for the improvement of the micro vibration motor, but does not exclude the application of the technique of the invention to a large vibration motor.
  • linear vibration motor and “micro vibration motor” have the same meanings.
  • FIGS. 2 and 3 respectively show cross-sectional structures of a linear vibration motor according to an embodiment of the present invention from different angles.
  • a linear vibration motor includes a housing and a vibration assembly housed in the housing, the vibration assembly including the mass 3 and the elastic support member 2; the elastic support member 2 is disposed at the mass Between the upper end surface of the block 3 and the inner surface of the top of the housing, the mass 3 is suspended in the housing by the elastic support 2 and provides an elastic restoring force for the movement of the mass 3.
  • the elastic support member 2 of the embodiment of the present invention is provided only in one piece, and the elastic support member 2 is a sheet-like structure including a first fixed end, a second fixed end, and a connecting arm disposed between the first fixed end and the second fixed end a symmetrically distributed cantilever is disposed on both sides of the connecting arm; in the assembly process of the linear vibration motor, the first fixed end is fixed on the mass or the casing, and the second fixed end is fixed in the casing or the mass One.
  • the two ends of the connecting arm are respectively connected to the first fixed end and the second fixed end; one end of the cantilever is connected to the first fixed end, and the other end of the cantilever is separated from the second fixed end; the cantilever is connected with the second fixed end One end of the separation is fixed to the housing or the mass corresponding to the second fixed end.
  • 4-1, 4-2, and 4-3 illustrate the structure of the elastic support member according to an embodiment of the present invention from different angles, respectively.
  • the elastic support member of the embodiment of the present invention includes a first fixed end 21, a second fixed end 22, and a connection between the first fixed end 21 and the second fixed end 22.
  • the arm 23 is respectively provided with a first cantilever 241 and a second cantilever 242 which are symmetrically distributed and identical in structure on both sides of the connecting arm 23.
  • the first cantilever 241 and the second cantilever 242 are collectively referred to as a cantilever 24; one end of the connecting arm 23 is provided with a connecting arm fulcrum 231 connected to the first fixed end 21, and the other end is connected to the second fixed end 22; One end of the first cantilever 241 is connected to the first fixed end 21, and the other end forms a first cantilever fulcrum 2411.
  • the first cantilever fulcrum 2411 is separated from the second fixed end 22 to form a horizontal free end, and the second cantilever One end of the 242 is connected to the first fixed end 21, and the other end forms a second cantilever fulcrum 2421.
  • the second cantilever fulcrum 2421 is separated from the second fixed end 22 and also forms a horizontal free end.
  • the elastic support member 2 is disposed between the upper end surface of the mass 3 and the inner surface of the top of the housing, and the mass 3 is suspended in the housing by the elastic support member 2, that is, the connecting arm 23 and the boom 24 are not placed in the horizontal direction in the linear vibration motor but are inclined at an angle to connect the casing and the mass 3.
  • the first fixed end 21 and the connecting arm fulcrum 231 are respectively welded and fixed on the mass/housing
  • the second fixed end 22 and the first cantilever fulcrum 2411 and the first The two cantilever fulcrums 2421 are respectively welded and fixed to the casing/mass.
  • the effective arm lengths of the connecting arm 23 and the cantilever are set equal. Length, where the effective arm length is used to remove the length of the fulcrum (including the first cantilever fulcrum, the second cantilever fulcrum and the connecting arm fulcrum) fixed to the mass or the housing, is only used to provide elasticity for the vibration of the mass The strength of the connecting arm 23 or the length of the cantilever.
  • the connecting arm 23 and the cantilever 24 are equidistantly displaced in the horizontal direction, that is, the equidistant misalignment connecting arm 23 exists between the connecting arm fulcrum 231 and the first cantilever fulcrum 2411 and the second cantilever fulcrum 2421.
  • the cantilever forms a misalignment of the parallelogram.
  • the equidistant misalignment here means that the connecting arm 23 and the cantilever 24 are not completely overlapped when viewed from the side, that is, they are arranged offset from each other in the horizontal direction, so that the coaxial rotation of the fulcrum can be effectively avoided, and the connecting arm 23 and the cantilever are aligned.
  • the inner space of the casing can be saved to the utmost, and the elastic support member of the invention can realize compression in an approximately flat state compared with the existing "C" shape or "V" shape elastic piece structure, thereby saving vibration space and facilitating small size of the product. Development.
  • the space saved can be used to increase the vibration component or the stator assembly, thereby increasing the vibration of the linear vibration motor.
  • the first fixed end 21, the second fixed end 22, the connecting arm 23 and the cantilever may be provided as an integrally formed structure, and the structure of the elastic support member Simple, it can reduce the process difficulty of the process assembly, and can be mass-produced.
  • FIGS 5-1 and 5-2 illustrate an elastic support structure in accordance with two further embodiments of the present invention, respectively.
  • the elastic support member 2 of the embodiment includes a first fixed end 21, a second fixed end 22, and a first cantilever 241 and a second cantilever 242 respectively connected to the first fixed end 21.
  • the connecting arm 23 is connected to the first fixed end 21 and the second fixed end 22 respectively.
  • One end of the connecting arm 23 is connected with the connecting arm fulcrum 231 and the first fixed end 21, and the first cantilever 241 and the second cantilever 242 are connected.
  • the arms 23 are symmetrically arranged, and the effective arm lengths of the cantilever and the connecting arm 23 are equal, and the fulcrums of the cantilever and the connecting arm 23 are equidistantly dislocated, respectively.
  • the first fixed end 21 is fixed on the mass/housing, and the second fixed end 22 and the free ends 2411 and 2421 of the cantilever away from the first fixed end 21 are fixed on the housing/mass.
  • the embodiment of Figure 5-1 differs from the embodiment of Figure 4-2 in that in the embodiment of Figure 4-2, the second fixed end 22 is a different component than the connecting arm 23, the second fixed end 22 and the connecting arm The other end of the 23 is connected, and the second fixed end 22 is located on the side of the connecting arm 23 and the cantilever 24 to surround the connecting arm 23 and the cantilever 24.
  • the other end of the connecting arm 23 is also a free end, and the free end of the connecting arm 23 is defined as a second fixed end 22.
  • both ends of the first cantilever and the second cantilever can also be configured similarly to the connecting arm, that is, one end of the connecting arm is connected to the first fixed end, and the other end of the connecting arm is opposite to the second fixed end.
  • the two ends of the cantilever are respectively connected to the first fixed end and the second fixed end, and one end of the connecting arm separated from the second fixed end is fixed to the housing or the mass corresponding to the second fixed end.
  • the elastic support member in this embodiment includes a first fixed end 21, a second fixed end 22, and a connecting arm 23, and the first fixed end 21 and the second fixed end 22 pass through the first cantilever 241 and
  • the second cantilever 242 is connected to a rectangular frame structure, and one end of the connecting arm 23, that is, the connecting arm fulcrum 231 is connected to the first fixed end 21, and the other end of the connecting arm 23 forms a free end; and the first cantilever fulcrum 2411 of the first cantilever 241
  • the second cantilever fulcrum 2421 of the second cantilever 242 is symmetrically distributed with respect to the connecting arm 23, and the effective arm lengths of the cantilever and the connecting arm 23 are equal.
  • the installation position of the elastic support member can be adjusted according to the product structure and requirements, and is not limited to a single assembly direction.
  • the elastic support member can be along the linear vibration motor.
  • the long axis direction is set, and the vibration direction of the connected mass may be the Z-axis direction of the linear vibration motor or the Y-axis direction.
  • the X-axis direction refers to the long-axis direction of the linear vibration motor in the horizontal plane shown in Fig. 1
  • the Y-axis direction represents the short-axis direction of the linear vibration motor in the horizontal plane
  • the Z-direction represents the direction perpendicular to the horizontal plane.
  • the vibration assembly further includes a magnetic circuit system embedded in the mass 3; the magnetic circuit system further includes a fixed connection with the mass 3
  • the potted frame 4 and the magnet 5 accommodated in the center of the basin frame 4 (the number of magnets and the direction of magnetization thereof can be adjusted according to production requirements), and the washer fixed to the side of the magnet 5 away from the basin frame 4 6, through the Huasi 6 gather magnetic lines of force, improve the magnetic field utilization, to achieve the effect of gathering the number of magnetic lines passing through the coil 7, so that the product obtains greater magnetic flux and a stronger vibration effect.
  • the linear vibration motor further includes a stator assembly housed in the housing, wherein the stator assembly includes a flexible printed circuit board (FPCB) fixed in the housing, is fixed on the flexible circuit board 8 and is coupled to the flexible circuit board. 8 is turned on the coil 7; a magnetic gap is formed between the magnet 5 and the side wall of the basin frame 4, and the coil 7 is suspended in the magnetic gap.
  • FPCB flexible printed circuit board
  • the mass 3 can be made of a high-density metal material such as a tungsten steel block or a nickel steel block or a nickel-tungsten alloy, and the mass 3 is enlarged.
  • the vibration force makes the vibration of the electronic product more intense.
  • the housing includes an upper case 1 and a lower case 9 that are adapted to be coupled, and the flexible circuit board 8 is fastened or attached to the inner side wall of the lower case.
  • the upper casing 1 is an unclosed rectangular parallelepiped structure
  • the lower casing 9 is fixed to the open end of the upper casing 1
  • the vibrating assembly and the stator assembly are housed in the cavity formed by the upper casing 1 and the lower casing 9.
  • the linear vibration motor provided by the present invention has the same effective arm lengths of the cantilever and the connecting arm of the elastic support member, and can ensure the same amount of compression and deformation of the connecting arm and the cantilever, and the connecting arm and the cantilever The distance between the arm and the pivot of the cantilever is prevented from rotating coaxially.
  • the length of the connecting arm or the cantilever caused by stretching and compression during the vibration process is the same, which is lengthened or shortened.
  • Increase the vibration stability of the vibration component effectively improve the polarization and deflection of the square or rectangular Z-direction or Y-direction linear vibration motor, control the polarization, reduce the friction, improve the noise, and improve the vibration experience of the linear vibration motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

La présente invention concerne un moteur à vibration linéaire, comprenant un boîtier et un ensemble vibration logé dans le boîtier. L'ensemble vibration comprend une masse (3) et un élément de support élastique (2) ; l'élément de support élastique (2) est disposée entre la surface d'extrémité supérieure de la masse (3) et la surface interne de la partie supérieure du boîtier, pour suspendre la masse (3) dans le boîtier au moyen de l'élément de support élastique (2) ; l'élément de support élastique (2) est d'une structure en feuille, et comprend une première extrémité fixe (21), une seconde extrémité fixe (22), et un bras de liaison (23) disposé entre la première extrémité fixe (21) et la seconde extrémité fixe (22), et des porte-à-faux distribués symétriquement (24) sont disposés des deux côtés du bras de liaison (23) ; l'une de la première extrémité fixe (21) et de la seconde extrémité fixe (22) est fixée sur la masse (3), et l'autre de la première extrémité fixe (21) et de la seconde extrémité fixe (22) est fixée sur le boîtier. La solution peut simplifier la structure de l'élément de support élastique, et obtenir une vibration stable de l'ensemble vibration.
PCT/CN2017/092492 2016-11-24 2017-07-11 Moteur à vibration linéaire WO2018095047A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201611067889.0A CN106655691B (zh) 2016-11-24 2016-11-24 线性振动马达
CN201611067889.0 2016-11-24

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Publication Number Publication Date
WO2018095047A1 true WO2018095047A1 (fr) 2018-05-31

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WO (1) WO2018095047A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022135126A1 (fr) * 2020-12-24 2022-06-30 歌尔股份有限公司 Module de haut-parleur et dispositif électronique
WO2024168644A1 (fr) * 2023-02-16 2024-08-22 瑞声光电科技(常州)有限公司 Carte de circuit imprimé flexible et dispositif de production sonore multifonctionnel

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106655691B (zh) * 2016-11-24 2018-03-06 歌尔股份有限公司 线性振动马达
CN110912369A (zh) * 2019-12-07 2020-03-24 歌尔股份有限公司 一种电子产品及电子产品组件
CN112600381A (zh) * 2020-12-21 2021-04-02 天津富禄通信技术有限公司 一种新型线性振动器
CN117411269B (zh) * 2023-12-15 2024-03-01 瑞声光电科技(常州)有限公司 振动马达

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Publication number Priority date Publication date Assignee Title
CN102055296A (zh) * 2009-11-02 2011-05-11 三星电机株式会社 用于直线振动电机的弹簧
KR20150016049A (ko) * 2013-08-03 2015-02-11 박준 선형 진동자
KR20150102876A (ko) * 2014-03-01 2015-09-09 박준 선형 진동자
CN205595986U (zh) * 2016-01-28 2016-09-21 歌尔声学股份有限公司 线性振动马达
CN106130304A (zh) * 2016-08-22 2016-11-16 歌尔股份有限公司 纵向振动马达
CN106655691A (zh) * 2016-11-24 2017-05-10 歌尔股份有限公司 线性振动马达

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102055296A (zh) * 2009-11-02 2011-05-11 三星电机株式会社 用于直线振动电机的弹簧
KR20150016049A (ko) * 2013-08-03 2015-02-11 박준 선형 진동자
KR20150102876A (ko) * 2014-03-01 2015-09-09 박준 선형 진동자
CN205595986U (zh) * 2016-01-28 2016-09-21 歌尔声学股份有限公司 线性振动马达
CN106130304A (zh) * 2016-08-22 2016-11-16 歌尔股份有限公司 纵向振动马达
CN106655691A (zh) * 2016-11-24 2017-05-10 歌尔股份有限公司 线性振动马达

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022135126A1 (fr) * 2020-12-24 2022-06-30 歌尔股份有限公司 Module de haut-parleur et dispositif électronique
WO2024168644A1 (fr) * 2023-02-16 2024-08-22 瑞声光电科技(常州)有限公司 Carte de circuit imprimé flexible et dispositif de production sonore multifonctionnel

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Publication number Publication date
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CN106655691A (zh) 2017-05-10

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