WO2020024682A1 - 振动电机 - Google Patents

振动电机 Download PDF

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Publication number
WO2020024682A1
WO2020024682A1 PCT/CN2019/088281 CN2019088281W WO2020024682A1 WO 2020024682 A1 WO2020024682 A1 WO 2020024682A1 CN 2019088281 W CN2019088281 W CN 2019088281W WO 2020024682 A1 WO2020024682 A1 WO 2020024682A1
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WO
WIPO (PCT)
Prior art keywords
coil
ring
vibrator
vibration motor
top wall
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/088281
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English (en)
French (fr)
Inventor
黄金全
石梦珣
凌芳华
张涛
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AAC Technologies Holdings Shenzhen Co Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
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Publication date
Application filed by AAC Acoustic Technologies Shenzhen Co Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2020024682A1 publication Critical patent/WO2020024682A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02K33/12—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with armatures moving in alternate directions by alternate energisation of two coil systems
    • 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
    • H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system

Definitions

  • the utility model relates to the field of vibration motors, in particular to a miniature vibration motor applied to mobile communication equipment.
  • vibration motors are used for system feedback, such as mobile phones. Call prompt, information prompt, navigation prompt, vibration feedback of game console, etc.
  • system feedback such as mobile phones. Call prompt, information prompt, navigation prompt, vibration feedback of game console, etc.
  • Vibration motors generally include a housing with a housing space, a vibrator housed in the housing space, and an elastic support component that connects the housing and the vibrator, respectively, and the elastic support component supports the vibrator along the inside of the housing.
  • the horizontal reciprocating motion generates vibration.
  • the structure of the vibration motor is not compact enough, and the driving force provided is insufficient to meet the needs of the vibration motor.
  • the utility model provides a new type of vibration motor, which has a compact structure, can drive a large effect without changing the size of the vibration motor, and achieves a better vibration effect.
  • the specific scheme is:
  • a vibration motor which includes a housing, a stator housed in the housing, a vibrator, and an elastic support assembly elastically supporting the vibrator, wherein the housing includes a top wall and is disposed opposite to the top wall. And a side wall connecting the top wall and the bottom wall, the stator includes a first coil provided on the top wall, a second coil provided on the bottom wall, and An iron core and a ring-shaped partition plate provided between the first coil and the second coil, the partition plate being sleeved on the iron core, the first coil and the second coil The two ends of the iron core are sleeved on the iron core and the partition plate is clamped and fixed.
  • the vibrator is a ring structure sleeved on the peripheral side of the stator and spaced from the stator.
  • the elastic supporting component supports the vibrator to vibrate in the axial direction.
  • the separator is made of a magnetically permeable material.
  • the vibrator includes a ring-shaped magnetic steel, a first pole core disposed on a side of the magnetic steel near the top wall, and a second pole disposed on a side of the magnetic steel near the bottom wall. core.
  • the elastic support assembly includes a ring-shaped spring leaf, the spring leaf includes an outer ring connected to the housing, an inner ring connected to the vibrator, and a ring connecting the outer ring and the inner ring. Connecting ring.
  • one side of the second pole core abuts on the bottom of the magnetic steel, and one side is connected to the outer ring of the spring piece.
  • the elastic supporting assembly further includes a first fixing ring and a second fixing ring sandwiching and fixing the spring piece, and an outer ring of the spring piece is sandwiched between the first fixing ring and the second fixing ring. Between the rings, and connected to the housing through the first fixed ring and the second fixed ring.
  • the case includes an upper case having a top wall and a side wall, and a lower case that is matched with the upper case group to form an accommodation space, and the lower case includes a bottom wall and a bottom wall.
  • the stator further includes a partition disposed between the first coil and the second coil.
  • it further comprises a flexible circuit board disposed on the bottom wall and electrically connected to the coil.
  • the vibration motor of the utility model comprises a casing, a stator accommodated in the casing, a vibrator, and an elastic supporting component elastically supporting the vibrator, wherein the casing includes a top wall opposite to the top wall. A bottom wall provided, and a side wall connecting the top wall and the bottom wall, the stator includes a first coil provided on the top wall, a second coil provided on the bottom wall, and the coil is disposed corresponding to the coil An iron core and a ring-shaped partition plate disposed between the first coil and the second coil, the partition plate is sleeved on the core, the first coil and the second coil The coil is sleeved on the iron core from both ends of the iron core, and the partition is clamped and fixed, and the vibrator is a ring structure sleeved on the peripheral side of the stator and spaced from the stator.
  • the elastic supporting component supports the vibrator to vibrate in the axial direction.
  • the vibration motor of this structure has a compact structure, and the driving efficiency is large without changing the size of the vibration motor, thereby achieving a better vibration effect.
  • FIG. 1 is an exploded structure diagram of a vibration motor of the present invention
  • Fig. 2 is a sectional view of a vibration motor of the present invention.
  • the present invention provides a vibration motor 100 including a housing 1, a stator 2 housed in the housing 1, a vibrator 3, and an elastic support assembly 4 that elastically supports the vibrator 3.
  • the casing 1 includes an upper casing 11 and a lower casing 12 that cooperates with the upper casing 11 to form a receiving space.
  • the upper casing 11 includes a top wall 111 and a side wall 112 bent and extended from the top wall 111.
  • the lower case 12 includes a bottom wall 121 corresponding to the top wall 111 and a flange 122 that is bent and extended from the edge of the bottom wall 121 toward the top wall 111.
  • the flange 122 abuts on the inner surface of the side wall 112, so as to achieve the packaging of the housing 1.
  • the stator 2 is fixed on the casing 1, one end of the elastic support assembly 4 is connected to the vibrator 3, and one end is connected to the side wall 112 of the casing 1.
  • the stator 2 specifically includes a coil 21 provided on the casing 1 and an iron core 22 corresponding to the coil 21.
  • the vibrator 3 includes a ring-shaped magnetic steel 31 that surrounds the coil 21 and the iron core 22 and is spaced apart from the coil 21 and the iron core 22.
  • the coil 21 receives the Lorentz force in the magnetic field during the current application to drive the vibrator 3 to vibrate in the axial direction.
  • the coil 21 includes a first coil 211 provided on the top wall 111 and a second coil 212 provided on the bottom wall 121.
  • the first coil 211 and the second coil 212 are flat coils sleeved on the core 22 from both ends of the core 22.
  • a magnetic field is formed between the coil 21 and the iron core 22, and a driving force in the axial direction is formed between the magnetic steel 31 of the vibrator 3 to drive the vibration of the vibrator 3.
  • a spacer 23 is further provided between the first coil 211 and the second coil 212.
  • the lower surface of the partition plate 23 is in contact with the upper surface of the second coil 212, and the upper surface of the partition plate 23 is in contact with the lower surface of the first coil 211.
  • the outer diameters of the first coil 211, the second coil 212, and the separator 23 are all the same.
  • the partition plate 23 is a ring-shaped structure, and plays a role of separating two voice coils to assist positioning.
  • the separator 23 may be made of a magnetically permeable material or a non-magnetically permeable material.
  • the partition plate 23 is made of a magnetically permeable material. In this way, it can not only play a role in assisting positioning, but also play a role of active magnetic permeability, preventing a magnetic field in the same direction from passing through both voice coils at the same time.
  • the vibrator 3 includes a ring-shaped magnetic steel 31 surrounding the stator, a first pole core 32 provided on the side of the magnetic steel 31 near the top wall 111, and a second pole core 33 provided on the side of the magnetic steel 31 near the bottom wall 121.
  • the first pole core 32 is attached to the upper surface of the magnetic steel 31, and its structure is exactly the same as that of the magnetic steel 31;
  • the second pole core 33 is attached to the lower surface of the magnetic steel 31, and the inner diameter of the second pole core 33 and
  • the magnetic steel 31 is the same, and the outer diameter is smaller than the magnetic steel 31, which is beneficial to the combination of the vibrator 3 and the elastic supporting component 4.
  • the elastic support assembly 4 includes a ring-shaped spring piece 41 and first and second fixing rings 42 and 43 provided on both sides of the spring piece 41.
  • the spring piece 41 includes an outer ring 411 connected to the housing 1, an inner ring 412 connected to the vibrator 3, and a connecting ring 413 connecting the outer ring 411 and the inner ring 412.
  • the first fixing ring 42 and the second fixing ring 43 sandwich the outer ring 411 of the fixed spring piece 41.
  • the second fixing ring 43 is disposed on the lower surface of the spring piece 41 and overlaps with the flange 122 of the casing 1, so as to achieve the fixing of the elastic support assembly 4 and the vibrator 3.
  • the vibration motor further includes a flexible circuit board 5 for realizing the electrical connection of the coil 21.
  • the vibration motor of the utility model comprises a casing, a stator accommodated in the casing, a vibrator, and an elastic supporting component elastically supporting the vibrator, wherein the casing includes a top wall opposite to the top wall.
  • the stator includes a first coil provided on the top wall, a second coil provided on the bottom wall, and the coil is disposed corresponding to the coil
  • An iron core and a ring-shaped partition plate disposed between the first coil and the second coil, the partition plate is sleeved on the core, the first coil and the second coil
  • the coil is sleeved on the iron core from both ends of the iron core, and the partition is clamped and fixed
  • the vibrator is a ring structure sleeved on the peripheral side of the stator and spaced from the stator.
  • the elastic supporting component supports the vibrator to vibrate in the axial direction.
  • the vibration motor of this structure has a compact structure, and the driving efficiency is large without changing the size of the vibration motor, thereby achieving a better vibration effect.

Landscapes

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

Abstract

本实用新型的振动电机，包括壳体、收容于壳体的定子、振子以及弹性支撑振子的弹性支撑组件，其特征在于，壳体包括顶壁、与顶壁相对设置的底壁以及连接顶壁和底壁的侧壁，定子包括设置在顶壁的第一线圈、设置在底壁的第二线圈、对应线圈设置的铁芯以及设置在第一线圈和第二线圈之间的环状结构的隔板，隔板套设在铁芯上，第一线圈和第二线圈自铁芯的两端套设在铁芯上并夹设固定隔板，振子为套设在定子的周侧并与定子间隔设置的环状结构，弹性支撑组件支撑振子沿轴向振动。本结构的振动电机结构紧凑，在不改变振动电机尺寸的前提下驱动效力大，实现更好的振动效果。

Description

振动电机 技术领域
本实用新型涉及振动电机领域，尤其涉及一种应用于移动通信设备的微型振动电机。
 背景技术
随着电子技术的发展，便携式消费性电子产品越来越受人们的追捧，如手机、掌上游戏机、导航装置或掌上多媒体娱乐设备等，一般都会用到振动电机来做系统反馈，比如手机的来电提示、信息提示、导航提示、游戏机的振动反馈等。如此广泛的应用，就要求振动电机的性能高，使用寿命长。
 技术问题
振动电机通常包括具有收容空间的壳体、收容于所述收容空间的振子及分别连接所述壳体与所述振子的弹性支撑组件，所述弹性支撑组件支撑所述振子在所述壳体内沿水平方向往复运动产生振动。然而，这种结构的振动电机结构不够紧凑，而且提供的驱动力不足，很难满足振动电机的需求。
因此，需要提供一种新的振动电机以解决上述问题。
 技术解决方案
本实用新型为解决上述问题，而提供一种新型的振动电机，其结构紧凑，可以在不改变振动电机尺寸的前提下驱动效力大，实现更好的振动效果。具体方案为：
提供一种振动电机，包括壳体、收容于所述壳体的定子、振子以及弹性支撑所述振子的弹性支撑组件，其特征在于，所述壳体包括顶壁、与所述顶壁相对设置的底壁以及连接所述顶壁和所述底壁的侧壁，所述定子包括设置在所述顶壁的第一线圈、设置在所述底壁的第二线圈、对应所述线圈设置的铁芯以及设置在所述第一线圈和所述第二线圈之间的环状结构的隔板，所述隔板套设在所述铁芯上，所述第一线圈和所述第二线圈自所述铁芯的两端套设在所述铁芯上并夹设固定所述隔板，所述振子为套设在所述定子的周侧并与所述定子间隔设置的环状结构，所述弹性支撑组件支撑所述振子沿轴向振动。
优选的，所述隔板为导磁材料制成。
优选的，所述振子包括环状的磁钢和设置在所述磁钢靠近所述顶壁一侧的第一极芯和设置在所述磁钢靠近所述底壁的一侧的第二极芯。
优选的，所述弹性支撑组件包括环状的弹簧片，所述弹簧片包括与所述壳体相连的外环、与所述振子相连的内环以及连接所述外环与所述内环的连接环。
优选的，所述第二极芯一侧抵接在所述磁钢的底部，一侧与所述弹簧片的外环相连。
优选的，所述弹性支撑组件还包括夹设固定所述弹簧片的第一固定圈和第二固定圈，所述弹簧片的外环夹设在所述第一固定圈和所述第二固定圈之间，并通过所述第一固定圈和所述第二固定圈与所述壳体相连接。
优选的，所述壳体包括具有顶壁和侧壁的上壳体和与所述上壳体组配围成容纳空间的下壳体，所述下壳体包括底壁和自所述底壁向顶壁方向弯折延伸的翻边，所述翻边抵触在所述侧壁的内表面，所述弹性支撑组件搭接在所述翻边上。
优选的，所述定子还包括设置在所述第一线圈与所述第二线圈之间的隔板。
优选的，还包括设置在所述底壁上，与所述线圈电性连接的柔性电路板。
本实用新型的振动电机，包括壳体、收容于所述壳体的定子、振子以及弹性支撑所述振子的弹性支撑组件，其特征在于，所述壳体包括顶壁、与所述顶壁相对设置的底壁以及连接所述顶壁和所述底壁的侧壁，所述定子包括设置在所述顶壁的第一线圈、设置在所述底壁的第二线圈、对应所述线圈设置的铁芯以及设置在所述第一线圈和所述第二线圈之间的环状结构的隔板，所述隔板套设在所述铁芯上，所述第一线圈和所述第二线圈自所述铁芯的两端套设在所述铁芯上并夹设固定所述隔板，所述振子为套设在所述定子的周侧并与所述定子间隔设置的环状结构，所述弹性支撑组件支撑所述振子沿轴向振动。
 有益效果
本结构的振动电机结构紧凑，在不改变振动电机尺寸的前提下驱动效力大，实现更好的振动效果。
 附图说明
图1为本实用新型振动电机的分解结构示意图；
图2为本实用新型振动电机的剖视图。
 本发明的实施方式
下面结合附图对本实用新型进一步说明。
如图1和图2所示，本实用新型提供一种振动电机100，包括壳体1、收容在壳体1内的定子2、振子3、弹性支撑振子3的弹性支撑组件4。
壳体1包括上壳体11和与上壳体11配合形成收容空间的下壳体12。上壳体11包括顶壁111和自顶壁111弯折延伸的侧壁112。下壳体12包括与顶壁111对应的底壁121和自底壁121的边缘向顶壁111方向弯折延伸的翻边122。翻边122抵触在侧壁112的内表面上，从而实现壳体1的封装。
定子2固定在壳体1上，弹性支撑组件4一端与振子3相连，一端与壳体1的侧壁112相连。
定子2具体包括设置在壳体1上的线圈21以及对应线圈21的铁芯22。振子3包括环绕线圈21和铁芯22并与线圈21和铁芯22间隔设置的环状的磁钢31。线圈21在通电过程中在磁场中受到洛伦兹力驱动振子3沿轴向振动。具体在本实施方式中，线圈21包括设置在顶壁111上的第一线圈211和设置在底壁121上的第二线圈212。第一线圈211和第二线圈212为自铁芯22的两端套设在铁芯22上的扁平线圈。在通电过程中，线圈21与铁芯22之间形成磁场，与振子3的磁钢31之间形成沿轴向方向的驱动力从而驱动振子3的振动。
进一步的，第一线圈211和第二线圈212之间还设置有隔板23，。隔板23的下表面与第二线圈212的上表面相抵接，隔板23的上表面与第一线圈211的下表面相抵接。第一线圈211、第二线圈212和隔板23的外径均相同。隔板23为环状的结构，起到将两音圈隔开，用以辅助定位的作用。隔板23可以采用导磁材料制成也可以采用不导磁材料制成。优选的，隔板23采用导磁材料制成，这样，不仅可以起到辅助定位的作用，还可以起到主动导磁的作用，防止同一个方向的磁场同时穿过两音圈。
振子3包括环绕定子的环状的磁钢31、设置在磁钢31靠近顶壁111一侧的第一极芯32和设置在磁钢31靠近底壁121的一侧的第二极芯33。其中，第一极芯32贴附在磁钢31的上表面，其结构与磁钢31完全相同；第二极芯33贴附在磁钢31的下表面，且第二极芯33的内径与磁钢31相同，外径小于磁钢31，这样有利于振子3与弹性支撑组件4的结合。
弹性支撑组件4包括环状的弹簧片41和设置在弹簧片41两侧的第一固定圈42和第二固定圈43。弹簧片41包括与壳体1相连的外环411、与振子3相连的内环412以及连接外环411与内环412的连接环413。第一固定圈42和第二固定圈43夹设固定弹簧片41的外环411。第二固定圈43设置在所述弹簧片41的下表面，并搭接在壳体1的翻边122上，从而实现弹性支撑组件4和振子3的固定。
进一步的，振动电机还包括用于实现线圈21电性连接的柔性电路板5。
本实用新型的振动电机，包括壳体、收容于所述壳体的定子、振子以及弹性支撑所述振子的弹性支撑组件，其特征在于，所述壳体包括顶壁、与所述顶壁相对设置的底壁以及连接所述顶壁和所述底壁的侧壁，所述定子包括设置在所述顶壁的第一线圈、设置在所述底壁的第二线圈、对应所述线圈设置的铁芯以及设置在所述第一线圈和所述第二线圈之间的环状结构的隔板，所述隔板套设在所述铁芯上，所述第一线圈和所述第二线圈自所述铁芯的两端套设在所述铁芯上并夹设固定所述隔板，所述振子为套设在所述定子的周侧并与所述定子间隔设置的环状结构，所述弹性支撑组件支撑所述振子沿轴向振动。本结构的振动电机结构紧凑，在不改变振动电机尺寸的前提下驱动效力大，实现更好的振动效果。尽管上面已经示出和描述了本实用新型的实施例，可以理解的是，上述实施例是、示例性的，不能理解为对本实用新型的限制，本领域的普通技术人员在本实用新型的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (8)

  1. 一种振动电机，包括壳体、收容于所述壳体的定子、振子以及弹性支撑所述振子的弹性支撑组件，其特征在于，所述壳体包括顶壁、与所述顶壁相对设置的底壁以及连接所述顶壁和所述底壁的侧壁，所述定子包括设置在所述顶壁的第一线圈、设置在所述底壁的第二线圈、对应所述线圈设置的铁芯以及设置在所述第一线圈和所述第二线圈之间的环状结构的隔板，所述隔板套设在所述铁芯上，所述第一线圈和所述第二线圈自所述铁芯的两端套设在所述铁芯上并夹设固定所述隔板，所述振子为套设在所述定子的周侧并与所述定子间隔设置的环状结构，所述弹性支撑组件支撑所述振子沿轴向振动。
  2. 根据权利要求1所述的振动电机，其特征在于，所述隔板为导磁材料制成。
  3. 根据权利要求1所述的振动电机，其特征在于，所述振子包括环状的磁钢、设置在所述磁钢靠近所述顶壁一侧的第一极芯和设置在所述磁钢靠近所述底壁的一侧的第二极芯。
  4. 根据权利要求3所述的振动电机，其特征在于，所述弹性支撑组件包括环状的弹簧片，所述弹簧片包括与所述壳体相连的外环、与所述振子相连的内环以及连接所述外环与所述内环的连接环。
  5. 根据权利要求4所述的振动电机，其特征在于，所述第二极芯一侧抵接在所述磁钢的底部，一侧与所述弹簧片的外环相连。
  6. 根据权利要求5所述的振动电机，其特征在于，所述弹性支撑组件还包括夹设固定所述弹簧片的第一固定圈和第二固定圈，所述弹簧片的外环夹设在所述第一固定圈和所述第二固定圈之间，并通过所述第一固定圈和所述第二固定圈与所述壳体相连接。
  7. 根据权利要求6所述的振动电机，其特征在于，所述壳体包括具有顶壁和侧壁的上壳体和与所述上壳体组配围成容纳空间的下壳体，所述下壳体包括底壁和自所述底壁向顶壁方向弯折延伸的翻边，所述翻边抵触在所述侧壁的内表面，所述弹性支撑组件搭接在所述翻边上。
  8. 根据权利要求1所述的振动电机，其特征在于，还包括设置在所述底壁上，与所述线圈电性连接的柔性电路板。
PCT/CN2019/088281 2018-08-03 2019-05-24 振动电机 Ceased WO2020024682A1 (zh)

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US11831215B2 (en) * 2021-05-06 2023-11-28 Aac Microtech (Changzhou) Co., Ltd. Linear vibration motor
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