WO2021134305A1 - 振动电机 - Google Patents

振动电机 Download PDF

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Publication number
WO2021134305A1
WO2021134305A1 PCT/CN2019/130130 CN2019130130W WO2021134305A1 WO 2021134305 A1 WO2021134305 A1 WO 2021134305A1 CN 2019130130 W CN2019130130 W CN 2019130130W WO 2021134305 A1 WO2021134305 A1 WO 2021134305A1
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WO
WIPO (PCT)
Prior art keywords
housing
vibration motor
vibrator assembly
assembly
groove
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PCT/CN2019/130130
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English (en)
French (fr)
Inventor
凌芳华
浦晓峰
王文礼
陶锋
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技(新加坡)有限公司
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Application filed by 瑞声声学科技(深圳)有限公司, 瑞声科技(新加坡)有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Priority to PCT/CN2019/130130 priority Critical patent/WO2021134305A1/zh
Publication of WO2021134305A1 publication Critical patent/WO2021134305A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/34—Reciprocating, oscillating or vibrating parts of the magnetic circuit
    • 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
    • H02K33/16—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 technical field of vibration motors, in particular to a vibration motor.
  • the vibrator reciprocates in the guide housing.
  • the existing guide housing Based on the strength of the existing guide housing and the level of forming technology, the existing guide housing has a thicker wall at the coil position, resulting in a larger magnetic gap, which directly leads to a significant decrease in the driving force. .
  • the purpose of the utility model is to provide a vibrating motor, which can reduce the wall thickness of the guide housing at the coil position, thereby reducing the magnetic gap, and then improving the driving force.
  • a vibration motor comprising a housing with a housing space, a vibrator assembly arranged in the housing space, a coil fixed in the housing, and a vibration motor arranged in the housing
  • a return component in the space the coil is used to drive the vibrator component to reciprocate in the receiving space, the return component is connected to the housing, and the return component is used to reset the vibrator component;
  • a groove is provided in the axial middle of the housing, and the rigidity of the housing at the groove is greater than the rigidity of the housing away from the groove;
  • the coil surrounds the groove.
  • the housing includes a connecting piece and a plurality of bodies, the middle of the connecting piece is hollowed out, each body is provided with a receiving cavity, and the plurality of bodies are respectively connected to both ends of the connecting piece, so The hollow middle part of the connecting piece communicates with the receiving cavities of a plurality of main bodies to form the receiving space.
  • the rigidity of the connecting piece is greater than the rigidity of any body.
  • the distance between the outermost ring of the connecting piece and the receiving space is smaller than the distance between the outermost ring of any body and the receiving space to form the groove.
  • the plurality of bodies and the connector are integrally formed.
  • the vibrator assembly includes a first magnetic steel and a second magnetic steel that are fixedly connected, a pole core fixed between the first magnetic steel and the second magnetic steel, and the first magnetic steel And the second magnetic steel is magnetized along the movement direction of the vibrator assembly, and the magnetic poles of the opposite faces of the first magnetic steel and the second magnetic steel are the same.
  • the vibrator assembly further includes a first mass and a second mass that are respectively fixed to the first magnetic steel and the second magnetic steel at one end away from the pole core, when the vibrator assembly When reciprocating in the receiving space, the first mass or the second mass hits the housing.
  • the return assembly includes a plurality of return springs arranged in the axial direction of the housing, and each return spring is respectively connected to the housing and the vibrator assembly.
  • a groove is provided in the axial middle of the housing, and the rigidity of the housing at the groove is greater than the rigidity of the housing away from the groove. Under the requirement of the same rigidity, the rigidity can be reduced.
  • the wall thickness of the small shell at the coil position reduces the magnetic gap and then improves the driving force.
  • Fig. 1 is a schematic diagram of an exploded structure of a vibration motor provided by an embodiment of the utility model
  • Figure 2 is a three-dimensional assembly diagram of a vibration motor provided by an embodiment of the utility model
  • Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 2.
  • an embodiment of the present invention provides a vibration motor
  • the vibration motor includes a housing 10 with a receiving space 14 (shown in Figure 3 below), set in the receiving space
  • the assembly 30, the restoring assembly 30 is used to reset the vibrator assembly 40;
  • the axial middle of the housing 10 is provided with a groove 12, and the rigidity of the housing 10 at the groove 12 is greater than that of the housing
  • the body 10 is away from the rigidity of the groove 12 (that is, the housing 10 is not located at the groove 12); the coil 20 surrounds the groove 12; under the requirement of achieving the same rigidity,
  • the wall thickness of the housing 10 at the position of the coil 20 can be reduced, thereby reducing the magnetic gap, increasing the number of turns of the coil 20, and then increasing the driving force.
  • the material of the housing 10 at the two ends of the groove 12 can be a magnetic or weak magnetic material.
  • the use of a magnetic material can improve the driving force of the product.
  • the magnetic material includes but is not limited to SUS430, SUS410, SUS444; weak magnetic materials include but not limited to SUS304, NK16, SUS631;
  • the rigidity of the housing 10 at the groove 12 is greater than the rigidity at the two ends of the groove 12 to ensure the strength of the housing 10;
  • the material of the housing 10 at the groove 12 is selected from nylon or PPS (Phenylenesulfide, plastic raw material); preferably, nylon is selected from nylon 45 plastic parts.
  • the return assembly 30 includes, but is not limited to, return springs (31A, 31B) installed in the direction of movement of the vibrator assembly 40 and connected to the housing 10 and the vibrator assembly 40 at both ends, or includes but not limited to installation A return magnetic spring that is spaced apart from the vibrator assembly 40 in the direction of movement of the vibrator assembly 40 and connected to the housing 10.
  • the vibrator assembly 40 includes a first magnet 42A and a second magnet 42B that are fixedly connected, and a pole core 43 fixed between the first magnet 42A and the second magnet 42B. And the first mass 41A and the second mass 41B respectively fixed to the first magnet 42A and the second magnet 42B at one end away from the pole core 43, when the vibrator assembly 40 is in the receiving When reciprocating in the space 14, the first mass 41A or the second mass 41B hits the housing 10 to output shock; the first magnet 42A and the second magnet 42B move along the The movement direction of the vibrator assembly 40 is magnetized, and the magnetic poles of the opposite faces of the first magnet 42A and the second magnet 42B are the same; And are respectively connected to the housing 10 and a number of return springs (31A, 31B) of the vibrator assembly 40.
  • the housing 10 includes, but is not limited to, a connecting piece 13 and two bodies (11A, 11B).
  • the middle of the connecting piece 13 is hollowed out, and the two bodies (11A, 11B) are hollowed out.
  • 11B) is provided with a receiving cavity. It should be noted that the ends of the two bodies (11A, 11B) away from the connecting piece 13 are closed, and the two bodies (11A, 11B) are connected to the connecting piece 13 respectively. At both ends, the hollowed-out middle part of the connecting piece 13 communicates with the accommodating cavities of the two bodies (11A, 11B) to form an accommodating space 14.
  • the rigidity of the connecting piece 13 is greater than the rigidity of any body (11A, 11B),
  • the distance between the outermost ring of the connecting member 13 and the receiving space 14 is smaller than the distance between the outermost ring of any body (11A, 11B) and the receiving space 14 to form the groove 12
  • the plurality of bodies (11A, 11B) and the connecting member 13 are integrally formed by injection molding, which facilitates the production of the housing 10.
  • the vibration motor adopts a sliding type spiral spring (31A, 31B) vibration motor, and a sliding type spiral spring (31A, 31B).
  • the vibration motor adopts the principle of resonance.
  • the spiral spring (31A, 31B) and the vibrator assembly 40 form a vibration system.
  • the vibrator assembly 40 slides back and forth in the housing space of the housing 10 with a guiding function.
  • the spiral spring (31A) 31B) Provide the restoring force of the vibrator assembly 40.
  • the coil 20 generates a magnetic field after the coil 20 is energized.
  • the different directions produce magnetic fields in different directions.
  • the magnetic fields in different directions and the magnetic fields of the first magnet 42A and the second magnet 42B produce two opposite magnetic forces.
  • the force drives the first mass 41A, the first magnet 42A, the pole core 43, the second magnet 42B, and the second mass 41B to reciprocate in the receiving space 14 under the guidance of the housing 10 to output Vibration; when the coil 20 is powered off, the two springs (31A, 31B) connected between the vibrator assembly 40 and the end of the housing 10 in the direction of movement of the vibrator assembly 40 cooperate to squeeze the vibrator assembly 40 until the vibrator assembly 40 Return to the initial position before power-on; when the return component 30 is a magnetic spring, the vibrating motor of this embodiment is also applicable, and the vibrator component 40 after power-off can also be reset to the position before power-on, which will not be repeated here.

Landscapes

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

Abstract

一种振动电机，所述振动电机包括具有收容空间（14）的壳体（10）、设置于所述收容空间（14）内的振子组件（40）、固定于所述壳体（10）内的线圈（20）、设置于所述收容空间（14）内的回复组件（30），所述线圈（20）用于驱动所述振子组件（40）在所述收容空间（14）内做往复运动，所述回复组件（30）与所述壳体（10）连接，所述回复组件（30）用于复位所述振子组件（40）。该振动电机壳体（10）轴向的中部设有凹槽（12），所述壳体（10）位于所述凹槽（12）处的刚性大于所述壳体（10）远离所述凹槽（12）处的刚性，在达到相同的刚性的要求下，能够减小壳体（10）在线圈（20）位置的壁厚，从而减小磁隙，继而提高驱动力。

Description

振动电机 技术领域
本实用新型涉及振动电机技术领域，尤其涉及一种振动电机。
背景技术
振子在导向壳体内往复运动，基于现有的导向壳体强度与成形工艺水平，现有的导向壳体在线圈位置壁厚较厚，导致磁隙较大，磁隙大直接导致驱动力明显下降。
因此，亟需一种振动电机，能够减小导向壳体在线圈位置壁厚，从而减小磁隙，继而提高驱动力。
发明概述
技术问题
本实用新型的目的在于提供一种振动电机，能够减小导向壳体在线圈位置壁厚，从而减小磁隙，继而提高驱动力。
问题的解决方案
技术解决方案
本实用新型的技术方案如下：一种振动电机，所述振动电机包括具有收容空间的壳体、设置于所述收容空间内的振子组件、固定于所述壳体内的线圈、设置于所述收容空间内的回复组件，所述线圈用于驱动所述振子组件在所述收容空间内做往复运动，所述回复组件与所述壳体连接，所述回复组件用于复位所述振子组件；
所述壳体轴向的中部设有凹槽，所述壳体位于所述凹槽处的刚性大于所述壳体远离所述凹槽处的刚性；
所述线圈环绕于所述凹槽。
作为一种改进，所述壳体包括连接件及若干本体，所述连接件的中部镂空，每一本体均设有收容腔，所述若干本体分别连接在所述连接件的两端部，所述连接件镂空的中部与若干本体的收容腔连通、以形成所述收容空间。
作为一种改进，所述连接件的刚性大于任一本体的刚性。
作为一种改进，所述连接件的最外圈至所述收容空间之间的距离小于任一本体的最外圈至所述收容空间之间的距离、以形成所述凹槽。
作为一种改进，所述若干本体与所述连接件一体成型。
作为一种改进，所述振子组件包括固定连接的第一磁钢和第二磁钢、固定于所述第一磁钢和所述第二磁钢之间的极芯，所述第一磁钢和所述第二磁钢沿所述振子组件的运动方向充磁，且所述第一磁钢和所述第二磁钢相对面的磁极相同。
作为一种改进，所述振子组件还包括分别固定于所述第一磁钢和所述第二磁钢远离所述极芯的一端的第一质量块和第二质量块，当所述振子组件在所述收容空间内做往复运动时，所述第一质量块或第二质量块撞击所述壳体。
作为一种改进，所述回复组件包括设置在所述壳体轴向方向上的若干回复弹簧，每一回复弹簧分别连接所述壳体及所述振子组件。
发明的有益效果
有益效果
本实用新型的有益效果在于：
所述壳体轴向的中部设有凹槽，所述壳体位于所述凹槽处的刚性大于所述壳体远离所述凹槽处的刚性，在达到相同的刚性的要求下，能够减小壳体在线圈位置的壁厚，从而减小磁隙，继而提高驱动力。
对附图的简要说明
附图说明
图1为本实用新型一实施例提供的振动电机的爆炸结构示意图；
图2为本实用新型一实施例提供的振动电机的立体组装图；
图3为图2中沿A-A剖线的剖视图。
发明实施例
具体实施方式
下面结合附图和实施方式对本实用新型作进一步说明。
请参看图1和2，本实用新型的一实施方式提供了一种振动电机，所述振动电机包括具有收容空间14(下图3中有示出)的壳体10、设置于所述收容空间14内的振子组件40、固定于所述壳体10内且驱动所述振子组件40在收容空间14内做往复运动的线圈20和设置于所述收容空间14内且与壳体10连接的回复组件30，所述回复组件30用于复位所述振子组件40；所述壳体10轴向的中部设有凹槽12，所述壳体10位于所述凹槽12处的刚性大于所述壳体10远离所述凹槽12处(也就是所述壳体10不位于所述凹槽12处)的刚性；所述线圈20环绕于所述凹槽12；在达到相同的刚性的要求下，能够减小壳体10在线圈20位置的壁厚，从而减小磁隙，增加线圈20的匝数，继而提高驱动力。
在一实施例中，壳体10位于所述凹槽12两端部的材料可以采用导磁或弱磁材料，使用导磁材料能提升产品驱动力，导磁材料包括但不限于SUS430、SUS410、SUS444；弱磁材料包括但不限于SUS304、NK16、SUS631；壳体10位于所述凹槽12处的刚性大于位于所述凹槽12两端部的刚性即可，以保证壳体10的强度；更进一步地，壳体10位于所述凹槽12处的材料选用尼龙或PPS(Phenylenesulfide，塑胶原料)；优选地，尼龙选用尼龙45塑料件。
应当指出的是，回复组件30包括但不限于安装在所述振子组件40运动方向上且两端分别与壳体10及振子组件40连接的回复弹簧(31A，31B)、或者包括但不限于安装在所述振子组件40运动方向上与所述振子组件40间隔设置且与壳体10连接的回复磁弹簧。
在一实施例中，所述振子组件40包括固定连接的第一磁钢42A和第二磁钢42B、固定于所述第一磁钢42A和所述第二磁钢42B之间的极芯43及分别固定于所述第一磁钢42A和所述第二磁钢42B远离所述极芯43的一端的第一质量块41A和第二质量块41B，当所述振子组件40在所述收容空间14内做往复运动时，所述第一质量块41A或第二质量块41B撞击所述壳体10、用以输出震感；所述第一磁钢42A和所述第二磁钢42B沿所述振子组件40的运动方向充磁，且所述第一磁钢42A和所述第二磁钢42B相对面的磁极相同；所述回复组件30包括设置在所述壳体10轴向方向上、且分别连接于所述壳体10及所述振子组件40的若干回复弹簧(31A，31B)。
请参看图3，在本实施例中，所述壳体10包括但不限于连接件13及两个本体(11A，11B)，所述连接件13的中部镂空，所述两个本体(11A，11B)设有收容腔，应当指出的是，两个本体(11A，11B)远离所述连接件13的端部为封闭的，两个本体(11A，11B)分别连接在所述连接件13的两端部，所述连接件13镂空的中部及两个本体(11A，11B)的收容腔连通以形成收容空间14，所述连接件13的刚性大于任一本体(11A，11B)的刚性，所述连接件13的最外圈至所述收容空间14之间的距离小于任一本体(11A，11B)的最外圈至所述收容空间14之间的距离、以形成所述凹槽12；优选地，所述若干本体(11A，11B)与所述连接件13通过注塑一体成型，便于壳体10的生产。
下面具体描述振子组件40在壳体10内的运动过程：在一实施例中，振动电机采用滑动式呈螺旋状的弹簧(31A，31B)振动电机，滑动式呈螺旋状的弹簧(31A，31B)振动电机采用共振原理，呈螺旋状的弹簧(31A，31B)与振子组件40组成振动系统，振子组件40在具有导向作用的壳体10的收容空间中往复滑动，呈螺旋状的弹簧(31A，31B)提供振子组件40回复力，当驱动系统驱动信号接近振动系统共振频率时，振子组件40达到最大位移，产生共振，获得最大震感；具体地，线圈20通电后产生磁场，根据线圈20通电方向的不同产生不同方向的磁场，不同方向的磁场与所述第一磁钢42A和所述第二磁钢42B的磁场之间产生两个方向相反的磁作用力，通过两个方向相反的磁作用力驱动所述第一质量块41A、第一磁钢42A、极芯43、第二磁钢42B以及第二质量块41B在壳体10的导向作用下在收容空间14内做往复运动从而输出震感；当线圈20断电后，在振子组件40运动方向上且连接在振子组件40及壳体10端部之间的两个弹簧(31A，31B)配合挤压振子组件40，直至振子组件40回复到通电前的初始位置；当回复组件30为磁弹簧时同样适用本实施例的振动电机，也能够将断电后的振子组件40复位至通电前的位置，此处不在赘述。
需要说明的是，本实用新型实施例中所有方向性指示(诸如上、下、内、外、顶部、底部……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
还需要说明的是，当元件被称为“固定于”或“设置于”另一个元件上时，该元件可以直接在另一个元件上或者可能同时存在居中元件。当一个元件被称为“连接”另一个元件，它可以是直接连接另一个元件或者可能同时存在居中元件。
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 (8)

  1. 一种振动电机，其特征在于，所述振动电机包括具有收容空间的壳体、设置于所述收容空间内的振子组件、固定于所述壳体内的线圈、设置于所述收容空间内的回复组件，所述线圈用于驱动所述振子组件在所述收容空间内做往复运动，所述回复组件与所述壳体连接，所述回复组件用于复位所述振子组件；
    所述壳体轴向的中部设有凹槽，所述壳体位于所述凹槽处的刚性大于所述壳体远离所述凹槽处的刚性；
    所述线圈环绕于所述凹槽。
  2. 根据权利要求1所述的振动电机，其特征在于：所述壳体包括连接件及若干本体，所述连接件的中部镂空，每一本体均设有收容腔，所述若干本体分别连接在所述连接件的两端部，所述连接件镂空的中部与若干本体的收容腔连通、以形成所述收容空间。
  3. 根据权利要求2所述的振动电机，其特征在于：所述连接件的刚性大于任一本体的刚性。
  4. 根据权利要求2所述的振动电机，其特征在于：所述连接件的最外圈至所述收容空间之间的距离小于任一本体的最外圈至所述收容空间之间的距离、以形成所述凹槽。
  5. 根据权利要求2所述的振动电机，其特征在于：所述若干本体与所述连接件一体成型。
  6. 根据权利要求1所述的振动电机，其特征在于：所述振子组件包括固定连接的第一磁钢和第二磁钢、固定于所述第一磁钢和所述第二磁钢之间的极芯，所述第一磁钢和所述第二磁钢沿所述振子组件的运动方向充磁，且所述第一磁钢和所述第二磁钢相对面的磁极相同。
  7. 根据权利要求6所述的振动电机，其特征在于：所述振子组件还包括分别固定于所述第一磁钢和所述第二磁钢远离所述极芯的一端的第一质量块和第二质量块，当所述振子组件在所述收容空间内 做往复运动时，所述第一质量块或第二质量块撞击所述壳体。
  8. 根据权利要求1所述的振动电机，其特征在于：所述回复组件包括设置在所述壳体轴向方向上的若干回复弹簧，每一回复弹簧分别连接所述壳体及所述振子组件。
PCT/CN2019/130130 2019-12-30 2019-12-30 振动电机 WO2021134305A1 (zh)

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