WO2020140535A1 - 线性振动电机 - Google Patents
线性振动电机 Download PDFInfo
- Publication number
- WO2020140535A1 WO2020140535A1 PCT/CN2019/110644 CN2019110644W WO2020140535A1 WO 2020140535 A1 WO2020140535 A1 WO 2020140535A1 CN 2019110644 W CN2019110644 W CN 2019110644W WO 2020140535 A1 WO2020140535 A1 WO 2020140535A1
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- WO
- WIPO (PCT)
- Prior art keywords
- arm
- fixed
- wall
- housing
- elastic member
- 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.)
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Classifications
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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
- H02K33/18—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
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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
-
- 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
Definitions
- the utility model relates to a vibration motor, in particular to a linear vibration motor used for portable consumer electronic products.
- vibration motors for system feedback, such as mobile phone Call reminder, information reminder, navigation reminder, game machine vibration feedback, etc.
- system feedback such as mobile phone Call reminder, information reminder, navigation reminder, game machine vibration feedback, etc.
- a linear vibration motor in the related art includes a housing with a receiving space, a vibration unit placed in the receiving space, an elastic member that suspends the vibration unit in the receiving space, and is fixed to the housing And a coil assembly that drives the vibration unit to vibrate;
- the vibration unit includes a mass block fixedly supported by the elastic member, a pole core embedded in the mass block surrounded by a side wall in a ring shape, and fixed to the Describe the two magnets inside the pole core.
- the magnetic steel is directly glued to the inner side of the pole core.
- the magnetic steel lacks support and is easily detached during vibration, which affects all Describe the reliability of linear vibration motor vibration.
- the utility model aims to provide a linear vibration motor with simple assembly, high assembly accuracy and high vibration reliability.
- the present invention provides a linear vibration motor, which includes a housing with an accommodation space, a vibration unit disposed in the accommodation space, and an elasticity for suspending the vibration unit in the accommodation space And a coil assembly fixed to the housing and driving the vibration unit to vibrate.
- the vibration unit includes a mass block fixedly supported by the elastic member and having a through hole, a pole core accommodated in the through hole, and A magnetic steel fixed to the pole core, the coil assembly is inserted into the through hole and spaced apart from the magnetic steel;
- the pole core includes a body part fixed to the mass and a self-body part To the positioning protrusion extending toward the coil assembly, the magnetic steel is provided with a positioning hole fixedly matched with the positioning protrusion.
- the body portion is rectangular and its long axis direction is parallel to the vibration direction, the body portion includes two long side walls parallel to its long axis direction and two short sides parallel to its short axis direction
- the long side wall is arranged parallel to the vibration direction of the vibration unit, and the positioning protrusion is formed by the long side wall extending.
- the cross-sections of the positioning protrusion and the positioning hole parallel to the long axis direction of the body portion are rectangular with rounded corners.
- the housing includes a bottom plate and an upper cover provided on the bottom plate and enclosing the receiving space together; the elastic member is fixed inside the upper cover and suspends the vibration unit on the In the upper cover, the coil assembly is fixed to the bottom plate.
- the elastic member includes a first elastic member and a second elastic member respectively disposed on opposite sides of the mass along the vibration direction, and the mass includes a first elastic member disposed oppositely along the direction of the long side wall A wall and a second wall;
- the first elastic member includes a first elastic arm, a first fixed arm and a first connecting arm that are bent in the same direction from both ends of the first elastic arm, the first A fixed arm is fixed to the first wall, the first elastic arm is spaced apart from the mass, and the first connecting arm is fixed to a side of the housing opposite to the second wall;
- the second elastic member includes a second elastic arm, a second fixed arm and a second connecting arm that are bent and extended in the same direction from both ends of the second elastic arm, and the second fixed arm is fixed to the second wall
- the second elastic arm is spaced apart from the mass, and the second connecting arm is fixed to the side of the housing opposite to the first wall.
- the linear vibration motor further includes at least two first reinforcing blocks, one of which is located on the side of the first connecting arm near the second wall and connects the first The arm is fixed to the housing; the other first reinforcing block is located on a side of the second connecting arm near the first wall and fixes the second connecting arm to the housing.
- the linear vibration motor further includes at least two second reinforcing blocks, the second reinforcing blocks are respectively located on a side of the first fixing arm and the second fixing arm close to the housing, two The second reinforcing block fixes the first fixing arm and the second fixing arm to the first wall and the second wall, respectively.
- the pole core includes a body portion fixed to the mass and a positioning protrusion extending from the body portion toward the coil assembly, the The magnetic steel is provided with a positioning hole that is fixedly matched with the positioning protrusion; during the assembly process, the magnetic steel is directly sleeved on the positioning protrusion through the positioning hole to achieve Positioning improves the assembly precision of the magnetic steel, and saves the alignment work between the magnetic steel and the pole core, reduces the difficulty of assembly, and makes the assembly simple; meanwhile, the positioning protrusion is The magnetic steel provides support, which makes the assembly of the magnetic steel and the pole core more reliable, and avoids the phenomenon that the magnetic steel falls off during vibration, thereby making the linear vibration motor highly reliable in vibration.
- Figure 1 is a perspective structural view of a linear vibration motor of the present invention
- FIG. 2 is an exploded view of a part of the three-dimensional structure of the linear vibration motor of the present invention
- Figure 3 is a cross-sectional view taken along line A-A in Figure 1;
- FIG. 4 is a schematic view of the stereo structure of the pole core of the utility model
- Fig. 5 is an assembly diagram of part of the structure of the linear vibration motor of the present invention.
- the present invention provides a linear vibration motor 100 including a housing 1 with a receiving space 10, a vibration unit 2, an elastic member 3 and a coil assembly 4.
- the housing 1 includes a bottom plate 11 and an upper cover 12 that is disposed on the bottom plate 11 and surrounds the receiving space 10 together.
- the vibration unit 2 is placed in the receiving space 10.
- the vibration unit 2 is supported and suspended in the accommodation space 10 by the elastic member 3, and the coil assembly 4 is used to drive the vibration unit 2 to vibrate.
- the vibration unit 2 includes a mass 21 fixedly supported by the elastic member 3 and having a through hole 210, a pole core 22 accommodated in the through hole 210, and a magnetic steel fixed to the pole core 22 23, the coil assembly 4 is inserted into the through hole 210 and is spaced apart from the magnetic steel 23.
- the magnetic steel 23 includes two and is respectively fixed on opposite sides of the pole core 22.
- the pole core 22 includes a body portion 221 accommodated in the through hole 210 and a positioning protrusion 220 extending from the body portion 221 toward the coil assembly 4, the magnetic steel 23 is provided with the positioning protrusion 220 is fixedly fitted with a positioning hole 230, the positioning hole 230 of the magnetic steel 23 is sleeved on the positioning protrusion 220 and fixedly connected with the body portion 221; the magnetic steel 23 and the body portion 221 pass through The fixed connection is formed by gluing.
- the body portion 221 has a rectangular shape and its long axis direction is parallel to the vibration direction.
- the body portion 221 includes two long side walls 2211 parallel to its long axis direction and relatively spaced apart parallel to its short axis direction Two short side walls 2212, the long side walls 2211 are disposed parallel to the vibration direction of the vibration unit 2, and the two positioning protrusions 220 are respectively formed by the two long side walls 2211 extending.
- the mass 21 includes a first wall 211 and a second wall 212 oppositely arranged along the direction of the long side wall 2211;
- the positions of the positioning protrusions 220 are not limited to this, and it is also feasible that the two positioning protrusions 220 are respectively disposed on the two short side walls 2212; the number of the positioning protrusions 220 is not limited to this It is also feasible that the positioning protrusion 220 includes four and surrounds the body portion 221, two of which are respectively disposed on the two long side walls 2211, and the other two are respectively disposed on the two short side walls 2212.
- each of the magnetic steel 23 is sleeved on the positioning protrusion 220 through the positioning hole 230 to form a gap fit and fixed, that is, the magnetic steel 23 is fixed on the side of the long side wall 221 glued In terms of position, accurate positioning between the magnetic steel 23 and the long side wall 221 is achieved, and the magnetic steel 23 can be directly glued with the long side wall 221.
- the magnetic steel 23 is directly inserted into the positioning protrusion 220 through the positioning hole 230 to achieve positioning with the body portion 221,
- the assembly accuracy of the magnetic steel 23 is improved, and the alignment work between the magnetic steel 23 and the pole core 22 is omitted, which reduces the difficulty of assembly and makes the assembly simple; meanwhile, the positioning protrusion 220 provides support for the magnetic steel 23, making the assembly of the magnetic steel 23 and the pole core 22 more reliable, avoiding the phenomenon of the magnetic steel 23 falling off during vibration, thereby making the linear vibration motor
- the vibration reliability of 100 is high.
- the cross-sections of the positioning protrusion 220 and the positioning hole 230 parallel to the long axis direction of the body portion 221 are rectangular with rounded corners, that is, the positioning protrusion 220 is a belt
- the positioning hole 230 is a rectangular hole with rounded corners.
- the rectangular structure with rounded corners can effectively limit the positioning protrusion 220 and the positioning hole 230 Relative rotation occurs between them, so that the fixing between the magnetic steel 23 and the long side wall 221 is more reliable, and the vibration reliability of the linear vibration motor 100 is further improved.
- the shape of the cross section of the positioning protrusion 220 and the positioning hole 230 along the direction of the long axis of the body portion 221 is not limited thereto.
- the elastic member 3 suspends the vibration unit 2 in the receiving space 10. That is, one end of the elastic member 3 is fixed to the vibration unit 2 and one end is fixed to the housing 1, specifically, fixed in the upper cover 12 of the housing 1 and suspending the vibration unit 2 Inside the upper cover 12.
- the elastic member 3 includes a first elastic member 31 and a second elastic member 32 respectively disposed on opposite sides of the mass 21 along the vibration direction.
- the arrangement of the double elastic member structure can make the vibration effect of the linear vibration motor 100 more balanced and more reliable.
- the first elastic member 31 includes a first elastic arm 311, a first fixed arm 312 and a first connecting arm 313 that are bent and extended in the same direction from both ends of the first elastic arm 311, respectively.
- the first fixing arm 312 is fixed to the first wall 211
- the first elastic arm 311 is spaced apart from the mass 21, and the first connecting arm 313 is fixed to the housing 1 and the The opposite side of the second wall 212.
- the second elastic member 32 includes a second elastic arm 321, a second fixed arm 322 and a second connecting arm 323 that are bent and extended in the same direction from both ends of the second elastic arm 321, respectively.
- the second fixing arm 322 is fixed to the second wall 212
- the second elastic arm 321 is spaced apart from the mass 21
- the second connecting arm 323 is fixed to the housing 1 and the The opposite side of the first wall 211.
- the first elastic member 31 and the second elastic member 32 sandwich and suspend the vibration unit 2 in the accommodation space 10 to provide vibration conditions for the vibration unit 2.
- the linear vibration motor 100 further includes at least two first reinforcing blocks 6 and two second reinforcing blocks 7.
- One of the first reinforcing blocks 6 is located on the side of the first connecting arm 313 close to the second wall 212 and fixes the first connecting arm 313 to the housing 1; the other The first reinforcing block 6 is located on the side of the second connecting arm 323 close to the first wall 211 and fixes the second connecting arm 323 to the housing 1.
- the two second reinforcing blocks 7 are respectively located on the sides of the first fixing arm 312 and the second fixing arm 322 close to the housing 1, and the two second reinforcing blocks 7 separate the first A fixing arm 312 and the second fixing arm 322 are respectively fixed to the first wall 211 and the second wall 212.
- the coil assembly 4 is fixed to the housing 1 and drives the vibration unit 2 to vibrate; in this embodiment, the coil assembly 4 is fixed to the bottom plate 11.
- the coil assembly 4 includes an iron core 41 fixed to the housing 1 and a coil 42 wound around the iron core 41.
- the coil assembly 4 is specifically fixedly installed on the bottom plate 11, and is arranged at a distance from the two magnetic steels 23. After the coil 42 is energized, the iron core 41 forms a magnetic field and communicates with all The magnetic field of the magnetic steel 23 interacts to drive the reciprocating linear motion of the vibration unit 2 to produce a vibration effect.
- the pole core includes a body portion fixed to the mass and a positioning protrusion extending from the body portion toward the coil assembly, the The magnetic steel is provided with a positioning hole that is fixedly matched with the positioning protrusion; during the assembly process, the magnetic steel is directly sleeved on the positioning protrusion through the positioning hole to achieve Positioning improves the assembly precision of the magnetic steel, and saves the alignment work between the magnetic steel and the pole core, reduces the difficulty of assembly, and makes the assembly simple; meanwhile, the positioning protrusion is The magnetic steel provides support, which makes the assembly of the magnetic steel and the pole core more reliable, and avoids the phenomenon that the magnetic steel falls off during vibration, thereby making the linear vibration motor highly reliable in vibration.
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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
一种线性振动电机，其包括具有收容空间（10）的壳体（1）、置于收容空间（10）内的振动单元（2）、将振动单元（2）悬置于收容空间（10）的弹性件（3）以及固定于壳体（1）并驱动振动单元（2）振动的线圈组件（4），振动单元（2）包括固定支撑于弹性件（3）且具有通孔（210）的质量块（21）、收容于通孔（210）内的极芯（22）以及固定于极芯（22）的磁钢（23），线圈组件（4）插设于通孔（210）内且与磁钢（23）间隔设置；极芯（22）包括固定于质量块（21）的本体部（221）和自本体部（221）朝向线圈组件（4）方向延伸的定位凸起（220），磁钢（23）设有与定位凸起（220）固定配合的定位孔（230）。线性振动电机装配简单、装配精度高且振动可靠性高。
Description
本实用新型涉及一种振动电机，尤其涉及一种用于便携式消费性电子产品的线性振动电机。
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，稳定性好且使用寿命长。
相关技术中的线性振动电机，其包括具有收容空间的壳体、置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的弹性件以及固定于所述壳体并驱动所述振动单元振动的线圈组件；所述振动单元包括固定支撑于所述弹性件的质量块、嵌设于所述质量块内的由侧壁围成环状的极芯以及固定于所述极芯内侧的两个磁钢。
然而，相关技术中，在装配所述磁钢的过程中，需要先对所述磁钢和所述极芯进行对位工作，而对位工作容易产生对位的偏差，使得难以保证所述磁钢的所述极芯之间的装配精度，而且使得装配难度高；另外，所述磁钢直接胶合于所述极芯内侧，所述磁钢缺乏支撑，在振动过程中容易脱落，影响了所述线性振动电机振动的可靠性。
因此，实有必要提供一种新的线性振动电机来解决上述问题。
本实用新型的目的在于提供一种装配简单、装配精度高且振动可靠性高的线性振动电机。
为解决上述技术问题，本实用新型提供一种线性振动电机，其包括具有收容空间的壳体、置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的弹性件以及固定于所述壳体并驱动所述振动单元振动的线圈组件，所述振动单元包括固定支撑于所述弹性件且具有通孔的质量块、收容于所述通孔内的极芯以及固定于所述极芯的磁钢，所述线圈组件插设于所述通孔且与所述磁钢间隔设置；所述极芯包括固定于所述质量块的本体部和自所述本体部朝向所述线圈组件延伸的定位凸起，所述磁钢设有与所述定位凸起固定配合的定位孔。
优选的，所述本体部呈矩形且其长轴方向平行于所述振动方向，所述本体部包括平行于其长轴方向的两个长侧壁以及平行于其短轴方向的两个短侧壁，所述长侧壁平行于所述振动单元的振动方向设置，所述定位凸起由所述长侧壁延伸形成。
优选的，所述定位凸起和所述定位孔沿平行于所述本体部的长轴方向的横截面均为带圆角的矩形。
优选的，所述壳体包括底板以及盖设于所述底板并共同围成所述收容空间的上盖；所述弹性件固定于所述上盖内侧并将所述振动单元悬置于所述上盖内，所述线圈组件固定于所述底板。
优选的，所述弹性件包括沿所述振动方向分别设置于所述质量块相对两侧的第一弹性件和第二弹性件，所述质量块包括沿所述长侧壁方向相对设置的第一壁和第二壁；所述第一弹性件包括第一弹臂、由所述第一弹臂的两端分别同向弯折延伸的第一固定臂和第一连接臂，所述第一固定臂固定于所述第一壁，所述第一弹臂与所述质量块间隔设置，所述第一连接臂固定于所述壳体的与所述第二壁相对的一侧；所述第二弹性件包括第二弹臂、由所述第二弹臂的两端分别同向弯折延伸的第二固定臂和第二连接臂，所述第二固定臂固定于所述第二壁，所述第二弹臂与所述质量块间隔设置，所述第二连接臂固定于所述壳体的与所述第一壁相对的一侧。
优选的，所述线性振动电机还包括至少两个第一加强块，其中一个所述第一加强块位于所述第一连接臂的靠近所述第二壁的一侧并将所述第一连接臂固定于所述壳体；另一个所述第一加强块位于所述第二连接臂的靠近所述第一壁的一侧并将所述第二连接臂固定于所述壳体。
优选的，所述线性振动电机还包括至少两个第二加强块，所述第二加强块分别位于所述第一固定臂和所述第二固定臂的靠近所述壳体的一侧，两个所述第二加强块将所述第一固定臂和所述第二固定臂分别固定于所述第一壁和所述第二壁。
与相关技术相比，本实用新型提供的线性振动电机中，所述极芯包括固定于所述质量块的本体部和自所述本体部的朝向所述线圈组件延伸的定位凸起，所述磁钢设有与所述定位凸起固定配合的定位孔；在装配工过程中，所述磁钢通过所述定位孔直接套设于所述定位凸起实现了与所述本体部之间的定位，提高了所述磁钢的装配精度，而且省去了对所述磁钢与所述极芯之间的对位工作，降低了装配难度，使得装配简单；同时，所述定位凸起为所述磁钢提供支撑，使得所述磁钢与所述极芯的装配更加可靠，避免了所述磁钢在振动过程中发生脱落的现象，从而使得所述线性振动电机的振动可靠性高。
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为本实用新型线性振动电机的立体结构图；
图2为本实用新型线性振动电机的部分立体结构分解图；
图3为沿图1中A-A线的剖示图；
图4为本实用新型的极芯的立体结构示意图；
图5为本实用新型线性振动电机的部分结构装配图。
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。
请同时参阅图1~2所示，本实用新型提供了一种线性振动电机100，其包括具有收容空间10的壳体1、振动单元2、弹性件3以及线圈组件4。
所述壳体1包括底板11和盖设于所述底板11并共同围成所述收容空间10的上盖12。
请同时参阅图2~4所示，所述振动单元2置于所述收容空间10内。本实施方式中，所述振动单元2通过所述弹性件3支撑悬置于所述收容空间10内，所述线圈组件4用以驱动所述振动单元2振动。
具体的，所述振动单元2包括固定支撑于所述弹性件3且具有通孔210的质量块21、收容于所述通孔210内的极芯22以及固定于所述极芯22的磁钢23，所述线圈组件4插设于所述通孔210内且与所述磁钢23间隔设置。
本实施方式中，所述磁钢23包括两个且分别固定于所述极芯22的相对两侧。
所述极芯22包括收容于所述通孔210的本体部221和自所述本体部221朝向所述线圈组件4延伸的定位凸起220，所述磁钢23设有与所述定位凸起220固定配合的定位孔230，所述磁钢23的所述定位孔230套设于所述定位凸起220并与所述本体部221固定连接；所述磁钢23与所述本体部221通过胶合的方式形成固定连接。
所述本体部221呈矩形且其长轴方向平行于所述振动方向，所述本体部221包括平行于其长轴方向的两个长侧壁2211以及平行于其短轴方向且相对间隔设置的两个短侧壁2212，所述长侧壁2211平行于所述振动单元2的振动方向设置，两个所述定位凸起220分别由两个所述长侧壁2211延伸形成。进一步的，所述质量块21包括沿长侧壁2211方向相对设置的第一壁211和第二壁212；
当然，所述定位凸起220设置的位置不限于此，两个所述定位凸起220分别设置于两个所述短侧壁2212也是可行的；所述定位凸起220的数量也不限于此，所述定位凸起220包括四个且环绕所述本体部221也是可行的，其中两个分别设置于两个所述长侧壁2211上，另外两个分别设置于两个所述短侧壁2212上。
上述结构中，每一所述磁钢23通过所述定位孔230套设于所述定位凸起220形成间隙配合固定，即将所述磁钢23固定在该侧的所述长侧壁221的胶合位置上，实现所述磁钢23与所述长侧壁221之间的精确定位，所述磁钢23可直接与所述长侧壁221形成胶合。
通过所述定位凸起220的设置，在装配工过程中，所述磁钢23通过所述定位孔230直接插设于所述定位凸起220实现了与所述本体部221之间的定位，提高了所述磁钢23的装配精度，而且省去了对所述磁钢23与所述极芯22之间的对位工作，降低了装配难度，使得装配简单；同时，所述定位凸起220为所述磁钢23提供支撑，使得所述磁钢23与所述极芯22的装配更加可靠，避免了所述磁钢23在振动过程中发生脱落的现象，从而使得所述线性振动电机100的振动可靠性高。
值得一提的是，所述定位凸起220和所述定位孔230沿平行于所述本体部221的长轴方向的横截面均为带圆角的矩形，即所述定位凸起220为带圆角的矩形柱，所述定位孔230为带圆角的矩形孔，与圆形结构相比，该带圆角的矩形结构能够有效地限制所述定位凸起220和所述定位孔230之间发生相对转动，从而使得所述磁钢23与所述长侧壁221之间的固定更加可靠，进一步提高所述线性振动电机100的振动可靠性。
当然，所述定位凸起220和所述定位孔230沿平行于所述本体部221的长轴方向的横截面的形状也不限于此。
请参阅图2及图5所示，所述弹性件3将所述振动单元2悬置于所述收容空间10内。即所述弹性件3一端固定于所述振动单元2，一端固定于所述壳体1，具体为固定于所述壳体1的所述上盖12内且将所述振动单元2悬置于所述上盖12内。
本实施方式中，所述弹性件3包括沿所述振动方向分别设置于所述质量块21相对两侧的第一弹性件31和第二弹性件32。双弹性件结构的设置可使所述线性振动电机100的振动效果更平衡，可靠性更好。
所述第一弹性件31包括第一弹臂311、由所述第一弹臂311的两端分别同向弯折延伸的第一固定臂312和第一连接臂313。所述第一固定臂312固定于所述第一壁211，所述第一弹臂311与所述质量块21间隔设置，所述第一连接臂313固定于所述壳体1的与所述第二壁212相对的一侧。
所述第二弹性件32包括第二弹臂321、由所述第二弹臂321的两端分别同向弯折延伸的第二固定臂322和第二连接臂323。所述第二固定臂322固定于所述第二壁212，所述第二弹臂321与所述质量块21间隔设置，所述第二连接臂323固定于所述壳体1的与所述第一壁211相对的一侧。上述结构中，所述第一弹性件31与所述第二弹性件32将所述振动单元2夹设悬置于收容空间10内，为所述振动单元2提供振动条件。
更优的，为了加强所述弹性件3的固定强度，所述线性振动电机100还包括至少两个第一加强块6和两个所述第二加强块7。
其中一个所述第一加强块位6于所述第一连接臂313的靠近所述第二壁212的一侧并将所述第一连接臂313固定于所述壳体1；另一个所述第一加强块6位于所述第二连接臂323的靠近所述第一壁211的一侧并将所述第二连接臂323固定于所述壳体1。
两个所述第二加强块7分别位于所述第一固定臂312和所述第二固定臂322的靠近所述壳体1的一侧，两个所述第二加强块7将所述第一固定臂312和所述第二固定臂322分别固定于所述第一壁211和所述第二壁212。
请参阅图2及图3所示，所述线圈组件4固定于所述壳体1并驱动所述振动单元2振动；本实施方式中，所述线圈组件4固定于所述底板11。
具体的，所述线圈组件4包括固定于所述壳体1的铁芯41和绕设于所述铁芯41的线圈42。
本实施方式中，所述线圈组件4具体固定安装于所述底板11，其与两个所述磁钢23正对间隔设置，所述线圈42通电后，所述铁芯41形成磁场并与所述磁钢23的磁场相互作用，从而驱动所述振动单元2往复直线运动，产生振动效果。
与相关技术相比，本实用新型提供的线性振动电机中，所述极芯包括固定于所述质量块的本体部和自所述本体部的朝向所述线圈组件延伸的定位凸起，所述磁钢设有与所述定位凸起固定配合的定位孔；在装配工过程中，所述磁钢通过所述定位孔直接套设于所述定位凸起实现了与所述本体部之间的定位，提高了所述磁钢的装配精度，而且省去了对所述磁钢与所述极芯之间的对位工作，降低了装配难度，使得装配简单；同时，所述定位凸起为所述磁钢提供支撑，使得所述磁钢与所述极芯的装配更加可靠，避免了所述磁钢在振动过程中发生脱落的现象，从而使得所述线性振动电机的振动可靠性高。
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 (7)
- 一种线性振动电机，其包括具有收容空间的壳体、置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的弹性件以及固定于所述壳体并驱动所述振动单元振动的线圈组件，所述振动单元包括固定支撑于所述弹性件且具有通孔的质量块、收容于所述通孔内的极芯以及固定于所述极芯的磁钢，所述线圈组件插设于所述通孔内且与所述磁钢间隔设置，其特征在于，所述极芯包括固定于所述质量块的本体部和自所述本体部朝向所述线圈组件延伸的定位凸起，所述磁钢设有与所述定位凸起固定配合的定位孔。
- 根据权利要求1所述的线性振动电机，其特征在于，所述本体部呈矩形且其长轴方向平行于所述振动方向，所述本体部包括平行于其长轴方向的两个长侧壁以及平行于其短轴方向的两个短侧壁，所述长侧壁平行于所述振动单元的振动方向设置，所述定位凸起由所述长侧壁延伸形成。
- 根据权利要求2所述的线性振动电机，其特征在于，所述定位凸起和所述定位孔沿平行于所述本体部的长轴方向的横截面均为带圆角的矩形。
- 根据权利要求1所述的线性振动电机，其特征在于，所述壳体包括底板以及盖设于所述底板并共同围成所述收容空间的上盖；所述弹性件固定于所述上盖内侧并将所述振动单元悬置于所述上盖内，所述线圈组件固定于所述底板。
- 根据权利要求2所述的线性振动电机，其特征在于，所述弹性件包括沿所述振动方向分别设置于所述质量块相对两侧的第一弹性件和第二弹性件，所述质量块包括沿所述长侧壁方向相对设置的第一壁和第二壁；所述第一弹性件包括第一弹臂、由所述第一弹臂的两端分别同向弯折延伸的第一固定臂和第一连接臂，所述第一固定臂固定于所述第一壁，所述第一弹臂与所述质量块间隔设置，所述第一连接臂固定于所述壳体的与所述第二壁相对的一侧；所述第二弹性件包括第二弹臂、由所述第二弹臂的两端分别同向弯折延伸的第二固定臂和第二连接臂，所述第二固定臂固定于所述第二壁，所述第二弹臂与所述质量块间隔设置，所述第二连接臂固定于所述壳体的与所述第一壁相对的一侧。
- 根据权利要求5所述的线性振动电机，其特征在于，所述线性振动电机还包括至少两个第一加强块，其中一个所述第一加强块位于所述第一连接臂的靠近所述第二壁的一侧并将所述第一连接臂固定于所述壳体；另一个所述第一加强块位于所述第二连接臂的靠近所述第一壁的一侧并将所述第二连接臂固定于所述壳体。
- 根据权利要求6所述的线性振动电机，其特征在于，所述线性振动电机还包括至少两个第二加强块，所述第二加强块分别位于所述第一固定臂和所述第二固定臂的靠近所述壳体的一侧，两个所述第二加强块将所述第一固定臂和所述第二固定臂分别固定于所述第一壁和所述第二壁。
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| CN209389906U (zh) * | 2018-12-30 | 2019-09-13 | 瑞声科技(新加坡)有限公司 | 线性振动电机 |
| CN111669022A (zh) * | 2020-06-24 | 2020-09-15 | 浙江省东阳市东磁诚基电子有限公司 | 一种快速响应的线性振动马达结构及其实现方法 |
| 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 |
| CN113794975B (zh) * | 2021-09-29 | 2025-04-04 | 瑞声光电科技(常州)有限公司 | 一种多功能发声器件 |
| CN217720995U (zh) * | 2022-01-25 | 2022-11-01 | 瑞声光电科技(常州)有限公司 | 振动电机 |
| US20240235354A1 (en) * | 2023-01-05 | 2024-07-11 | Aac Microtech (Changzhou) Co., Ltd. | Vibrating motor |
| WO2025123313A1 (zh) * | 2023-12-15 | 2025-06-19 | 瑞声光电科技(常州)有限公司 | 振动马达 |
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| CN106849581A (zh) * | 2016-10-24 | 2017-06-13 | 瑞声科技(新加坡)有限公司 | 永磁同步电机 |
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