WO2019029052A1 - Moteur à vibration linéaire - Google Patents

Moteur à vibration linéaire Download PDF

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Publication number
WO2019029052A1
WO2019029052A1 PCT/CN2017/112169 CN2017112169W WO2019029052A1 WO 2019029052 A1 WO2019029052 A1 WO 2019029052A1 CN 2017112169 W CN2017112169 W CN 2017112169W WO 2019029052 A1 WO2019029052 A1 WO 2019029052A1
Authority
WO
WIPO (PCT)
Prior art keywords
vibration motor
linear vibration
vibrator assembly
magnet
assembly
Prior art date
Application number
PCT/CN2017/112169
Other languages
English (en)
Chinese (zh)
Inventor
毛东升
张新众
臧玮晔
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 WO2019029052A1 publication Critical patent/WO2019029052A1/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
    • 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
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets

Definitions

  • the invention relates to the field of electronic product technology. More specifically, it relates to a linear vibration motor.
  • a miniature linear vibration motor is usually used for feedback of the system, such as clicking the vibration feedback of the touch screen.
  • a linear vibration motor is a component that converts electrical energy into mechanical vibration using the principle of electromagnetic force.
  • a conventional linear vibration motor is usually installed in a mobile communication terminal, a portable terminal or the like, which is usually installed at an edge portion of the device, and receives vibrations. The object produces vibration in a vertical direction.
  • Existing linear vibration motors typically include a housing having a receiving chamber in which is disposed a stator assembly, a vibrator assembly, and an elastomeric support configured to suspend the vibrator assembly within the receiving chamber.
  • the stator assembly may be a magnet or a coil fixedly coupled to the housing, and the corresponding vibration assembly may be a coil or magnet that is supported by the elastic support for up and down vibration.
  • the existing magnets as the stator assembly or the vibrator assembly are all cylindrical solid core structures, and the coil is surrounded by the periphery of the magnet. After the coil is energized, the coil is subjected to the ampere force to generate electromagnetic force and between the magnetic field generated by the magnet. The interaction, in turn, causes the vibrator assembly to move up and down, which in turn results in vibration of the entire linear vibration motor.
  • the vibrator assembly collides with the stator assembly during the working process, thereby reducing the service life of the linear vibration motor, and at the same time, noise is generated during the work, which affects the user experience.
  • a linear vibration motor comprising:
  • stator assembly including a housing having a receiving cavity, a magnet disposed within the receiving cavity and coupled to the housing, the magnet including a hollow portion;
  • a vibrator assembly including a coil and a mass; the hollow portion extending in a vibration direction of the vibrator assembly, the coil vibrating with the vibrator assembly and being inserted into a hollow portion of the magnet when the vibrator assembly vibrates; wherein A damping member that prevents the stator assembly from colliding with the vibrator assembly is disposed on the stator assembly and/or the vibrator assembly;
  • An elastic support configured to suspend the vibrator assembly within the receiving cavity of the housing.
  • the damping member is fixedly coupled to the lower end surface of the magnet.
  • the damping component is a magnetic fluid.
  • the damping member is fixedly coupled to an inner side surface of the housing.
  • the damping member is fixedly fixed to a top surface of the mass.
  • the damping member is coupled to a lower surface of the top of the elastic support.
  • the vibrator assembly further includes a magnetic conductive plate, the coil, the mass and the damping component are fixedly fixed on an upper surface of the magnetic conductive plate, and a lower surface of the magnetic conductive plate is fixed to a top surface of the elastic support member connection.
  • the vibrator assembly further includes a magnetic conductive plate, the coil and the mass are fixedly fixed on an upper surface of the magnetic conductive plate, the top of the elastic support is annular, and the annular joint is fixed to the guide A damping member is coupled to the central portion of the lower surface of the magnetic plate near the outer edge of the lower surface of the magnetic plate.
  • the damping member has a circular shape, and at least one notch is formed on the inner side or the outer side of the circular ring.
  • the shape of the damping member is a discontinuous circular shape.
  • the linear vibration motor provided by the invention can maximize the magnetic properties of the magnet by improving the structure of the magnet and its arrangement with the coil, improve the utilization efficiency of the magnetic line of the coil magnet, improve the electromagnetic driving force of the motor, and increase the driving force.
  • the effective frequency of the motor is increased, which is convenient for the application of the dual-frequency or multi-frequency resonance frequency, satisfies the requirement of the vibration of the motor under the multi-frequency point, and improves the tactile experience of the motor.
  • the linear vibration motor of the present invention further includes a damping member capable of preventing direct collision between the vibrator assembly and the stator assembly, thereby prolonging the service life of the motor, and at the same time, reducing the noise generated when the motor is operated, thereby improving the user experience. .
  • Fig. 1 is a cross-sectional view showing the structure of a linear vibration motor according to a first embodiment of the present invention.
  • Fig. 2 is a cross-sectional view showing the structure of a linear vibration motor according to a second embodiment of the present invention.
  • Fig. 3 is a cross-sectional view showing the structure of a linear vibration motor according to a second embodiment of the present invention.
  • Fig. 4 is a cross-sectional view showing the structure of a linear vibration motor according to a second embodiment of the present invention.
  • Fig. 5 is a view showing the structure of the damper member of the present invention.
  • Fig. 6 is a view showing the structure of the damper member of the present invention.
  • Fig. 7 is a view showing the structure of the damper member of the present invention.
  • Fig. 8 is a cross-sectional view showing the structure of a linear vibration motor according to a third embodiment of the present invention.
  • Fig. 9 is a cross-sectional view showing the structure of a linear vibration motor according to a third embodiment of the present invention.
  • Fig. 10 is a cross-sectional view showing the structure of a linear vibration motor according to a third embodiment of the present invention.
  • Fig. 11 is a cross-sectional view showing the structure of a linear vibration motor according to a third embodiment of the present invention.
  • weights both of which refer to one of the components that cooperate with the magnet or coil to vibrate within the motor housing as a vibrator assembly.
  • present invention is mainly used for the improvement of the linear vibration motor used in the description, and may also be referred to as a Y-direction vibration motor.
  • a linear vibration motor will be specifically described as an example.
  • the linear vibration motor of the present embodiment includes: a stator assembly including a housing 1 having a receiving cavity, a magnet 2 accommodating and fixed in combination with the housing 1 , the magnet 2 including a hollow portion 21 extending in a vibration direction of the vibrator assembly; in the present invention, the magnet 2 may be segmented or
  • the continuous annular structure is not limited by the present invention.
  • a vibrator assembly including a coil 3 disposed coaxially with the magnet 2 and surrounding A mass 4 disposed coaxially with the coil 3 at the periphery of the coil 3; when the vibrator assembly vibrates, the coil 3 vibrates with the vibrator assembly and is inserted into the hollow portion 21 of the magnet 2.
  • An elastic support member 5 is configured to suspend the vibrator assembly within the receiving cavity of the housing 1.
  • the housing 1 includes a first housing 11 having an opening at the bottom, and a second housing 12 fixedly coupled to the opening; the first housing 11 and the second housing 12 are configured to have a receiving cavity.
  • Housing 1 both the first housing 11 and the second housing 12 are made of a material having magnetic permeability, so that it is convenient to close the magnetic lines of the magnet, so that the magnetic action of the magnet 2 is maximized to enhance the motor. Electromagnetic driving force.
  • the casing 1 has a circular structure.
  • the casing 1 may also have a non-circular cross-section structure, and may be, for example, a rectangular parallelepiped shape, a rounded rectangular parallelepiped shape or the like.
  • the vibrator assembly has a magnetic conductive plate 6, and the coil 3 and the mass 4 are fixedly coupled to the upper surface of the magnetic conductive plate 6, and a magnet 2 is inserted between the coil 3 and the mass 4.
  • the gap is 7.
  • the elastic support member 5 is fixedly fixed between the lower surface of the magnetic conductive plate 6 and the inner side surface of the second casing 12, and is configured to suspend the vibrator assembly
  • the housing 1 is housed in a cavity.
  • the linear vibration motor of the present embodiment further includes a circuit 3 for electrically connecting the coil 3 to an external device;
  • the printed circuit board 8 includes: a lower surface of the magnetic conductive plate 6 And a fixing portion electrically connected to the coil 3; a connecting portion outside the casing 1 and fixed to the upper surface of the second casing 12 for electrically connecting with an external device;
  • the fixing portion 81 and the connecting portion 82 are connected to each other as a flexible connecting portion of a unitary structure. Wherein the flexible connecting portion is located below the elastic arm of the elastic support member 5.
  • the limit of the damping member provided on the upper surface of the second casing can be prevented to prevent the elastic arm from being pressed to the flexible connecting portion to damage the flexible connecting portion.
  • the mass and/or the magnetic conductive plate in the motor should be provided with wire vias connecting the coil and the printed circuit board to enable the coil to be electrically connected to the external device, but for the via hole.
  • the specific position and structural form of the present invention are not limited herein.
  • the magnet 2 having an annular structure fixed in combination with the inner surface of the top wall of the first casing 11 is used as a stator assembly, and the coil 3 is inserted as a part of the vibrator assembly into the hollow portion 21 of the magnet 2 with the vibrator assembly.
  • the magnet 2 as a stator having a ring structure and its arrangement with the coil 3 as a vibrator are compared with the columnar solid core magnet used in the conventional vibration motor, due to the magnetic field lines of the existing cylindrical solid magnet. Is radiated and dispersed outward from the central axis, and the magnetic lines of force of the ring-shaped structural magnet of the present invention are collected on the central axis, and thus are disposed on the central axis of the magnet of the annular structure.
  • the coil position is at a higher magnetic field strength than the coil disposed around the periphery of the cylindrical solid magnet; and the coil of the present invention is disposed in the inner space of the magnet having the annular structure, and the diameter of the coil can be made smaller, so the coil effective circle
  • the number is significantly higher than the effective number of turns of the large-diameter coil disposed on the periphery of the cylindrical solid-core magnet, and the linear vibration motor provided by the present invention can maximize the magnetic properties of the magnet, improve the utilization efficiency of the magnetic line of the coil magnet, and improve the motor.
  • Electromagnetic driving force, and the increase of driving force makes the effective bandwidth of the motor increase, which is convenient for the application of dual-frequency or multi-frequency resonant frequency, and meets the requirements of the vibration of the motor under multi-frequency points, and improves the tactile sense of the motor.
  • the linear vibration motor of the present invention further includes a damping member 9 that prevents the vibrator assembly from colliding with the stator assembly, and the damping member 9 may be silicone, foam or magnetic fluid.
  • the damper member 9 in the present embodiment is a magnetic fluid provided on the lower end surface of the magnet 2.
  • the magnetic fluid is adsorbed on the lower end surface of the magnet 2, which is a magnetic colloidal substance, for example, a surface of a long-chain wrapped with an outer layer of nano-sized magnetic particles (such as nickel, cobalt or iron oxide)
  • the active agent is then uniformly dispersed in a base liquid such as water, an organic solvent or an oil to form a uniformly stable colloidal liquid.
  • the magnet 2 and the magnetic conductive plate 6 compress the magnetic fluid 9, and since the magnetic fluid 9 has a large viscous resistance, it is possible to generate a damping effect on the vibrator assembly. Also, as the degree of compression of the magnetic fluid 9 increases, the damping effect gradually increases. Therefore, the magnetic fluid 9 can avoid direct collision between the vibrator assembly and the stator assembly, thereby prolonging the service life of the linear vibration motor, and at the same time reducing the noise generated during the vibration, thereby improving the user experience.
  • 2-4 are cross-sectional views showing a linear vibration motor according to a second embodiment of the present invention, and the linear vibration motor of the present embodiment is different from the first embodiment in that the damping member 9 is fixedly coupled to the stator.
  • the inner side of the housing 1 of the assembly As shown in FIG. 2, the damper member 9 is coupled to the inner side surface of the top end of the first casing 11 with respect to the center position of the coil 3. As shown in FIG. 3, the damper member 9 is coupled to the inner side surface of the top end of the first casing 11 with respect to both side edges of the coil 3. As shown in FIG. 4, the damper member 9 is bonded and fixed to the inner side surface of the second casing 12 at a position on both sides of the top of the elastic support member 5.
  • the damping member 9 has a circular shape, and at least one notch is formed on the inner side or the outer side of the circular ring. As shown in FIG. 5, four square notches are symmetrically formed inside the damping member 9. As shown in FIG. 6, four square notches are symmetrically formed on the outer side of the damper member 9. As shown in Fig. 7, the damping member 9 can also be a discontinuous annular structure.
  • FIG. 8-11 are cross-sectional views showing a linear vibration motor according to a third embodiment of the present invention, and the linear vibration motor of the present embodiment is different from the second embodiment in that the damping member 9 is fixedly coupled to the vibrator On the component.
  • the damping member 9 is fixedly coupled to the top surface of the mass 4.
  • the damper member 9 is coupled and fixed to the top surface of the magnetic conductive plate 6.
  • the damping member 9 is fixedly coupled to the top bottom surface of the elastic support member 5 near the outer edge.
  • the top of the elastic support member 5 is annular, and the bottom edge of the magnetic conductive plate 6 is fixedly coupled to the top surface of the elastic support member 5.
  • the damping member 9 is fixedly coupled to the center of the bottom surface of the magnetic conductive plate 6.
  • the damping member 9 of the linear vibration motor of the present invention may be disposed only at one location or at a plurality of locations as described above, and those skilled in the art may select as needed.

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

Abstract

Un moteur à vibration linéaire comprend : un ensemble stator, comprenant un boîtier (1) ayant une cavité de réception, et un aimant (2) disposé dans la cavité de réception et fixé à demeure au boîtier, l'aimant comprenant une partie creuse (21) ; un ensemble vibreur, comprenant une bobine (3) et un bloc de masse (4) ; la partie creuse s'étendant dans une direction de vibration de l'ensemble vibreur, et lorsque l'ensemble vibreur vibre, la bobine vibrant avec l'ensemble vibreur et étant insérée dans la partie creuse de l'aimant ; l'ensemble stator et/ou l'ensemble vibreur étant pourvus d'un composant d'amortissement (9) sur ceux-ci pour empêcher la collision entre l'ensemble stator et l'ensemble vibreur ; et un élément de support élastique (5), configuré pour suspendre l'ensemble vibreur dans la cavité de réception du boîtier. Le moteur à vibration linéaire ci-dessus peut utiliser le magnétisme d'un aimant (2) de façon maximale pour améliorer la force d'entraînement électromagnétique d'un moteur, et un composant d'amortissement peut empêcher une collision directe entre un ensemble stator et un ensemble vibreur, prolongeant ainsi efficacement la durée de vie d'un moteur.
PCT/CN2017/112169 2017-08-11 2017-11-21 Moteur à vibration linéaire WO2019029052A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201721005065.0 2017-08-11
CN201721005065.0U CN207069867U (zh) 2017-08-11 2017-08-11 一种线性振动马达

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Publication Number Publication Date
WO2019029052A1 true WO2019029052A1 (fr) 2019-02-14

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PCT/CN2017/112169 WO2019029052A1 (fr) 2017-08-11 2017-11-21 Moteur à vibration linéaire

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WO (1) WO2019029052A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110190724A (zh) * 2019-06-17 2019-08-30 重庆市灵龙电子有限公司 一种基于磁阻尼与固态缓冲材料阻尼的线性马达

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101541441A (zh) * 2006-11-15 2009-09-23 株式会社J&J 超小型线性振动装置
CN101882853A (zh) * 2009-05-04 2010-11-10 三星电机株式会社 线性振动器
CN102832778A (zh) * 2011-06-16 2012-12-19 磁化电子株式会社 线性振动产生设备
KR101354518B1 (ko) * 2008-08-23 2014-01-27 주식회사 유진하이텍 리니어 진동모터

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101541441A (zh) * 2006-11-15 2009-09-23 株式会社J&J 超小型线性振动装置
KR101354518B1 (ko) * 2008-08-23 2014-01-27 주식회사 유진하이텍 리니어 진동모터
CN101882853A (zh) * 2009-05-04 2010-11-10 三星电机株式会社 线性振动器
CN102832778A (zh) * 2011-06-16 2012-12-19 磁化电子株式会社 线性振动产生设备

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