WO2020125156A1 - 线性振动电机 - Google Patents

线性振动电机 Download PDF

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Publication number
WO2020125156A1
WO2020125156A1 PCT/CN2019/110109 CN2019110109W WO2020125156A1 WO 2020125156 A1 WO2020125156 A1 WO 2020125156A1 CN 2019110109 W CN2019110109 W CN 2019110109W WO 2020125156 A1 WO2020125156 A1 WO 2020125156A1
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WIPO (PCT)
Prior art keywords
yoke
hole
fixed
permanent magnet
vibration motor
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Ceased
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PCT/CN2019/110109
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English (en)
French (fr)
Inventor
张涛
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AAC Technologies Holdings Shenzhen Co Ltd
AAC Technologies Holdings Nanjing Co Ltd
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AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Holdings Nanjing Co Ltd
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Publication of WO2020125156A1 publication Critical patent/WO2020125156A1/zh
Anticipated expiration legal-status Critical
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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
    • H02K33/16—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

Definitions

  • the utility model relates to the field of electroacoustic conversion, in particular to a linear vibration motor.
  • the linear vibration motor of the related art includes a housing having an accommodation space, a vibration unit accommodated in the accommodation space, an elastic component suspending the vibration unit in the accommodation space, and driving the vibration unit to vibrate and fix Drive unit in the housing.
  • the vibration unit structure of the linear vibration motor of the related art is not stable enough, and a drop event occurs from time to time.
  • the permanent magnet is very easy to fall in the drop test, which leads to a decrease in the yield and reliability of the linear vibration motor.
  • the technical problem to be solved by the utility model is to provide a linear vibration motor with stable structure and strong reliability.
  • the present invention provides a linear vibration motor, which includes a housing with a storage space, a vibration unit stored in the storage space, and a suspension of the vibration unit in the storage space An elastic component and a driving unit that drives the vibration unit to vibrate and be fixed to the housing, the vibration unit includes a counterweight with an intermediate through-hole, a yoke assembled in the through-hole, and attached to and fixed to For the permanent magnet of the yoke, the vibration unit further includes baffles covering both ends of the through hole, and an orthographic projection of the permanent magnet in a vertical vibration direction at least partially overlaps the baffle.
  • the weights include end surfaces at both ends of the through hole and an annular groove recessed from the end surface in a vertical vibration direction, the annular groove communicates with the through hole, and the baffle is fixedly held In the annular groove.
  • the annular groove includes a groove bottom surface, and the height of the yoke and the permanent magnet in the vertical vibration direction is equal to the vertical distance between the two groove bottom surfaces.
  • the baffle is glued to the bottom surface of the groove, and the baffle is in contact with the yoke and the permanent magnet.
  • the vibration unit further includes a yoke assembled in the through hole, and the permanent magnet is fixed to the yoke.
  • the weight block further includes an inner side wall surrounding the through hole, the yoke is fixed to the inner side wall, the permanent magnet is fixed to the yoke, and the driving unit is inserted in The through hole is spaced apart from the permanent magnet.
  • the yoke has a ring shape, and the yoke includes a first side wall facing the permanent magnet and oppositely disposed and a second side wall connecting the first side wall and oppositely disposed, the permanent magnet is Four, one permanent magnet is fixedly arranged on each of the first side wall and the second side wall.
  • the driving unit includes a pole shoe fixed to the housing, a pole core fixed to the pole shoe, and a coil wound around and fixed to the pole core.
  • the housing includes a bottom plate and an upper cover assembled with the bottom plate to form the receiving space, and the baffle is provided with an escape hole corresponding to the through hole to avoid the pole shoe.
  • One end of the pole shoe is fixed to the upper cover in the vertical vibration direction, and the other end is fixed to the bottom plate.
  • the pole shoe includes a fixing hole penetrating along the vibration direction, there are two pole shoes, and two ends of the pole core are respectively held and fixed to the fixing hole.
  • the linear vibration motor of the present invention strengthens the structure of the linear vibration motor by providing the baffle in the vibration unit and protects the permanent magnet during the drop test So that the structure of the linear vibration motor is stable and the reliability is strong.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a linear vibration motor provided by the utility model
  • FIG. 2 is a schematic diagram of a three-dimensional structure of the linear vibration motor shown in FIG. 1 after removing the upper cover;
  • FIG. 3 is an exploded schematic view of the three-dimensional structure of the linear vibration motor shown in FIG. 1;
  • FIG. 4 is a cross-sectional view of the linear vibration motor shown in FIG. 1 along line A-A;
  • FIG. 5 is a partial perspective exploded view of the linear vibration motor of the present invention.
  • the linear vibration motor 100 includes a housing 10 with a receiving space, a vibrating unit 30 received in the receiving space, and the vibrating unit 30 is suspended in the receiving space
  • the elastic component 70 drives the vibration unit 30 to vibrate and is fixed to the drive unit 50 of the housing 10.
  • the housing 10 includes a bottom plate 11 and an upper cover 13 configured to form the storage space with the bottom plate 11.
  • the vibration unit 30 includes a weight 31 having an intermediate through hole 311, a yoke 33 assembled in the through hole 311, and a permanent magnet 35 attached to and fixed to the yoke 33 And cover baffles 37 provided at both ends of the through hole 311; wherein, the driving unit 50 is located in the center of the yoke 33, and the orthographic projection of the permanent magnet 35 in the vertical vibration direction is at least partially in contact with the baffle 37 overlap.
  • the vibration unit 30 may not include the yoke 33, and the permanent magnet 35 may be directly fixed to the weight 31.
  • the weight 31 further includes end surfaces 313 at both ends of the through hole 311, an annular groove 315 recessed from the end surface 313 in the vertical vibration direction, and an inner side wall 317 surrounding the through hole 311.
  • the yoke 33 is fixed to the inner side wall 317
  • the permanent magnet 35 is fixed to the yoke 33
  • the driving unit 50 is inserted into the through hole 311 and spaced from the permanent magnet 35 Settings.
  • the annular groove 315 communicates with the through hole 311, and the baffle 37 is clamped and fixed in the annular groove 315.
  • the baffle 37 By providing the baffle 37, the structural stability and reliability of the yoke 33 and the plurality of permanent magnets 35 are strengthened, so that the yoke 33 and the permanent magnets 35 will not fall during vibration , To ensure the product yield of the linear vibration motor 100.
  • the annular groove 315 includes a groove bottom surface 3151.
  • the height of the yoke 33 and the permanent magnet 35 in the vertical vibration direction is equal to the two The vertical spacing between the bottom surfaces of the grooves 3151.
  • the baffle 37 is glued to the bottom surface 3151 of the groove, and the baffle 37 is in contact with the yoke 33 and the permanent magnet 35 to further enhance the structural stability of the permanent magnet.
  • the yoke 33 has a ring shape.
  • the yoke 33 includes a first side wall 331 facing the permanent magnet 35 and oppositely disposed, and a second side wall 333 connecting the first side wall 331 and oppositely disposed.
  • the number of the permanent magnets 35 is four. Specifically, one permanent magnet 35 is fixedly arranged on each of the first side wall 331 and the second side wall 333. In other embodiments, the number of permanent magnets 35 may be two.
  • the driving unit 50 includes a pole shoe 51 fixed to the housing, a pole core 53 fixed to the pole shoe 51, and a coil 55 wound around and fixed to the pole core 53.
  • the driving unit 50 is connected to the bottom plate 11 and the upper cover 13 at both ends of the through hole 311 in the penetrating direction. Therefore, a evacuation opening 371 corresponding to the through hole 311 is provided in the central portion of the baffle 37 to avoid the pole shoe 51, and one end of the pole shoe 51 is fixed to the upper cover 13 in the vertical vibration direction. The other end is fixed to the bottom plate 11.
  • the pole shoe 51 includes a fixing hole 511 penetrating in the vibration direction, the number of the pole shoe 51 is two, and two ends of the pole core 53 are respectively held and fixed to the fixing hole 511.
  • the linear vibration motor 100 of the present invention strengthens the structure of the linear vibration motor 100 by providing the baffle 37 in the vibration unit 30, and protects the linear vibration motor 100 during a drop test.
  • the function of the permanent magnet 35 makes the linear vibration motor 100 stable in structure and strong in reliability.

Landscapes

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

Abstract

一种线性振动电机（100），包括具收容空间的壳体（10）、收容于所述收容空间内的振动单元（30）、将所述振动单元（30）悬置于所述收容空间内的弹性组件（70）及驱动所述振动单元（30）振动并固定于所述壳体的驱动单元（50），所述振动单元（30）包括具有中间通孔（311）的配重块（31）、组配于所述通孔（311）内的磁轭（33）及贴设固定于所述磁轭（33）的永磁体（35），所述振动单元（30）还包括盖设于所述通孔（311）两端的挡板（37），所述永磁体（35）沿垂直振动方向的正投影至少部分与所述挡板（37）重叠。上述线性振动电机（100）结构稳定，可靠性强。

Description

线性振动电机 技术领域
本实用新型涉及电声转换领域，尤其涉及一种线性振动电机。
 背景技术
随着电子技术的快速发展，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，这些电子产品一般都会用到线性电机来做系统反馈，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。
相关技术的线性振动电机包括具有收容空间的壳体、收容于所述收容空间内的振动单元、将所述振动单元悬置于所述收容空间内的弹性组件及驱动所述振动单元振动并固定于所述壳体的驱动单元。
然而，在跌落测试中，相关技术的所述线性振动电机的振动单元结构不够稳定，跌落事件时有发生。尤其是永磁体极易在跌落测试中掉落，从而导致线性振动电机的良率降低，可靠性降低。
因此，有必要提供一种新的线性振动电机来解决上述问题。
 技术问题
本实用新型要解决的技术问题是提供一种结构稳定，可靠性强的线性振动电机。
 技术解决方案
为解决上述技术问题，本实用新型提供了一种线性振动电机，包括具收容空间的壳体、收容于所述收容空间内的振动单元、将所述振动单元悬置于所述收容空间内的弹性组件及驱动所述振动单元振动并固定于所述壳体的驱动单元，所述振动单元包括具有中间通孔的配重块、组配于所述通孔内的磁轭及贴设固定于所述磁轭的永磁体，所述振动单元还包括盖设于所述通孔两端的挡板，所述永磁体沿垂直振动方向的正投影至少部分与所述挡板重叠。
优选的，所述配重块包括位于所述通孔两端的端面及自所述端面沿垂直振动方向凹陷的环形槽，所述环形槽与所述通孔连通，且所述挡板卡持固定于所述环形槽内。
优选的，所述环形槽包括槽底面，所述磁轭及所述永磁体沿垂直振动方向的高度等于两个所述槽底面之间的垂直间距。
优选的，所述挡板与所述槽底面胶接，所述挡板与所述磁轭及所述永磁体抵接。
优选的，所述振动单元还包括组配于所述通孔内的磁轭，所述永磁体固定于所述磁轭。
优选的，所述配重块还包括围设成所述通孔的内侧壁，所述磁轭固定于所述内侧壁，所述永磁体固定于所述磁轭，所述驱动单元插设于所述通孔且与所述永磁体间隔设置。
优选的，所述磁轭呈环形，所述磁轭包括朝向所述永磁体且相对设置的第一侧壁和连接所述第一侧壁且相对设置的第二侧壁，所述永磁体为四个，所述第一侧壁和所述第二侧壁上各固定设置有一个所述永磁体。
优选的，所述驱动单元包括固定于所述壳体的极靴、固定于所述极靴的极芯以及缠绕固定于所述极芯的线圈。
优选的，所述壳体包括底板及与所述底板组配形成所述收容空间的上盖，所述挡板上开设有避让所述极靴且与所述通孔对应的避让孔，所述极靴沿垂直振动方向一端固定于所述上盖，另一端固定于所述底板。
优选的，所述极靴包括沿振动方向贯穿的固定孔，所述极靴为两个，所述极芯的两端分别卡持固定于所述固定孔。
 有益效果
与相关技术相比，本实用新型的线性振动电机，通过在所述振动单元内设置所述挡板，加强了所述线性振动电机的结构，在跌落测试中起到保护所述永磁体的作用，使得所述线性振动电机结构稳定，可靠性强。
 附图说明
为了更清楚地说明本实用新型实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本实用新型提供的线性振动电机的立体结构示意图；
图2为图1所示的线性振动电机去除上盖后的立体结构示意图；
图3为图1所示的线性振动电机的立体结构分解示意图；
图4为图1所示的线性振动电机沿A-A线的剖视图；
图5为本实用新型的线性振动电机的部分立体分解图。
 本发明的实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本实用新型保护的范围。
请结合参阅图1至图5，所述线性振动电机100包括具收容空间的壳体10、收容于所述收容空间内的振动单元30、将所述振动单元30悬置于所述收容空间内的弹性组件70、驱动所述振动单元30振动并固定于所述壳体10的驱动单元50。
所述壳体10包括底板11及与所述底板11组配形成所述收容空间的上盖13。
在本实施例中，所述振动单元30包括具有中间通孔311的配重块31、组配于所述通孔311内的磁轭33、贴设固定于所述磁轭33的永磁体35及盖设于所述通孔311两端的挡板37；其中，所述驱动单元50位于所述磁轭33的中央，所述永磁体35沿垂直振动方向的正投影至少部分与所述挡板37重叠。在其他实施例中，振动单元30也可不包括磁轭33，永磁体35可直接固定于配重块31。
所述配重块31还包括位于所述通孔311两端的端面313、自所述端面313沿垂直振动方向凹陷的环形槽315及围成所述通孔311的内侧壁317。具体的，所述磁轭33固定于所述内侧壁317，所述永磁体35固定于所述磁轭33，所述驱动单元50插设于所述通孔311且与所述永磁体35间隔设置。
所述环形槽315与所述通孔311连通，且所述挡板37卡持固定于所述环形槽315内。通过设置所述挡板37，加强了所述磁轭33及多个所述永磁体35的结构稳定性及可靠性，使得所述磁轭33及所述永磁体35不至于在振动过程中跌落，保证了所述线性振动电机100的产品良率。
所述环形槽315包括槽底面3151。优选的，为了进一步加强所述磁轭33和所述永磁体35结构的稳定性，在本实施方式中，所述磁轭33及所述永磁体35沿垂直振动方向的高度等于两个所述槽底面3151之间的垂直间距。
优选的，所述挡板37与所述槽底面3151胶接，所述挡板37与所述磁轭33及所述永磁体35抵接，进一步增强了永磁体的结构稳定性。
所述磁轭33呈环形。所述磁轭33包括朝向所述永磁体35且相对设置的第一侧壁331和连接所述第一侧壁331且相对设置的第二侧壁333。所述永磁体35的数量为四个，具体的，所述第一侧壁331和所述第二侧壁333上各固定设置有一个所述永磁体35。在其他实施例中，永磁体35的数量也可为两个。
所述驱动单元50包括固定于所述壳体的极靴51、固定于所述极靴51的极芯53以及缠绕固定于所述极芯53的线圈55。所述驱动单元50沿所述通孔311贯穿方向的两端分别与所述底板11和所述上盖13连接。因此，在所述挡板37的中心部分开设有避让所述极靴51且与所述通孔311对应的避让口371，所述极靴51沿垂直振动方向一端固定于所述上盖13，另一端固定于所述底板11。
具体参见图5，所述极靴51包括沿振动方向贯穿的固定孔511，所述极靴51的数量为两个，所述极芯53的两端分别卡持固定于所述固定孔511。
与相关技术相比，本实用新型的线性振动电机100，通过在所述振动单元30内设置所述挡板37，加强了所述线性振动电机100的结构，在跌落测试中起到保护所述永磁体35的作用，使得所述线性振动电机100结构稳定，可靠性强。
以上所述的仅是本实用新型的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，还可以做出改进，但这些均属于本实用新型的保护范围。

Claims (10)

  1. 一种线性振动电机，包括具收容空间的壳体、收容于所述收容空间内的振动单元、将所述振动单元悬置于所述收容空间内的弹性组件及驱动所述振动单元振动并固定于所述壳体的驱动单元，所述振动单元包括具有中间通孔的配重块、组配于所述通孔内的磁轭及贴设固定于所述磁轭的永磁体，其特征在于，所述振动单元还包括盖设于所述通孔两端的挡板，所述永磁体沿垂直振动方向的正投影至少部分与所述挡板重叠。
  2. 根据权利要求1所述的线性振动电机，其特征在于，所述配重块包括位于所述通孔两端的端面及自所述端面沿垂直振动方向凹陷的环形槽，所述环形槽与所述通孔连通，且所述挡板卡持固定于所述环形槽内。
  3. 根据权利要求2所述的线性振动电机，其特征在于，所述环形槽包括槽底面，所述磁轭及所述永磁体沿垂直振动方向的高度等于两个所述槽底面之间的垂直间距。
  4. 根据权利要求3所述的线性振动电机，其特征在于，所述挡板与所述槽底面胶接，所述挡板与所述磁轭及所述永磁体抵接。
  5. 根据权利要求1所述的线性振动电机，其特征在于，所述振动单元还包括组配于所述通孔内的磁轭，所述永磁体固定于所述磁轭。
  6. 根据权利要求5所述的线性振动电机，其特征在于，所述配重块还包括围设成所述通孔的内侧壁，所述磁轭固定于所述内侧壁，所述永磁体固定于所述磁轭，所述驱动单元插设于所述通孔且与所述永磁体间隔设置。
  7. 根据权利要求6所述的线性振动电机，其特征在于，所述磁轭呈环形，所述磁轭包括朝向所述永磁体且相对设置的第一侧壁和连接所述第一侧壁且相对设置的第二侧壁，所述永磁体为四个，所述第一侧壁和所述第二侧壁上各固定设置有一个所述永磁体。
  8. 根据权利要求1所述的线性振动电机，其特征在于，所述驱动单元包括固定于所述壳体的极靴、固定于所述极靴的极芯以及缠绕固定于所述极芯的线圈。
  9. 根据权利要求8所述的线性振动电机，其特征在于，所述壳体包括底板及与所述底板组配形成所述收容空间的上盖，所述挡板上开设有避让所述极靴且与所述通孔对应的避让孔，所述极靴沿垂直振动方向一端固定于所述上盖，另一端固定于所述底板。
  10. 根据权利要求9所述的线性振动电机，其特征在于，所述极靴包括沿振动方向贯穿的固定孔，所述极靴为两个，所述极芯的两端分别卡持固定于所述固定孔。
PCT/CN2019/110109 2018-12-17 2019-10-09 线性振动电机 Ceased WO2020125156A1 (zh)

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CN208589892U (zh) * 2018-08-03 2019-03-08 瑞声科技（南京）有限公司 振动电机
CN209200904U (zh) * 2018-12-17 2019-08-02 瑞声科技（南京）有限公司 线性振动电机
CN214626754U (zh) * 2021-03-31 2021-11-05 瑞声光电科技(常州)有限公司 一种线性振动马达
CN215186386U (zh) * 2021-04-29 2021-12-14 瑞声光电科技(常州)有限公司 线性振动电机
JP7599019B1 (ja) * 2022-12-19 2024-12-12 エーエーシー テクノロジーズ （ナンジン） カンパニーリミテッド 多方向振動モータ
JP2025531959A (ja) * 2023-09-04 2025-09-29 エーエーシー マイクロテック（チャンヂョウ）カンパニー リミテッド リニア振動モーター

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