WO2022267307A1 - 一种线性振动马达 - Google Patents
一种线性振动马达 Download PDFInfo
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- WO2022267307A1 WO2022267307A1 PCT/CN2021/129990 CN2021129990W WO2022267307A1 WO 2022267307 A1 WO2022267307 A1 WO 2022267307A1 CN 2021129990 W CN2021129990 W CN 2021129990W WO 2022267307 A1 WO2022267307 A1 WO 2022267307A1
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- vibration
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- 238000005452 bending Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006698 induction Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001080 W alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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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
- H02K33/02—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
Definitions
- the utility model relates to the technical field of electronic products. More specifically, it relates to a linear vibration motor.
- vibration motors are generally used for system feedback, such as the incoming call notification of mobile phones, the vibration feedback of game consoles, etc.
- Existing linear vibrating motors generally include vibrating components and elastic supports housed in a casing.
- the elastic support is used to suspend the vibrating component in the housing, which not only provides restoring force for the vibrating component, but also provides supporting force for suspending in space.
- the structure of the elastic support has relatively high stress, which leads to poor vibration effect of the existing linear vibration motor and cannot well meet people's needs.
- the utility model provides a linear vibrating motor.
- a better vibration effect is obtained, and the reliability and service life of the product are improved.
- the utility model provides a linear vibration motor, comprising:
- a housing a vibrating component housed in the housing, a stator component and two elastic supports for suspending the vibrating component in the housing;
- the elastic support includes an elastic portion
- the elastic part includes three elastic arms formed by continuous bending in the vibration direction of the vibration component;
- the first elastic arm and the third elastic arm are located on both sides of the second elastic arm; the projections of the three elastic arms on the vibration direction of the vibration assembly coincide; at least two elastic arms in the three elastic arms are arranged in parallel ;
- the elastic support also includes a first fixing portion and a second fixing portion extending along the vibration direction of the vibration assembly;
- the first fixing part is connected and fixed on the end of the first elastic arm
- the second fixing part is connected and fixed on the end part of the third elastic arm.
- the two elastic supports are arranged symmetrically about the center of the vibrating assembly.
- the elastic support member is formed by continuous bending of a piece of sheet material.
- the preferred solution is that the ends of two adjacent elastic arms are connected by connecting arms; The connection is fixed.
- At least one of the three elastic arms includes a missing portion.
- each of the three elastic arms includes a missing portion, and the projections of the missing portions on the three elastic arms in the vibration direction of the vibrating component coincide or do not overlap.
- the extending direction of the first fixing portion and the extending direction of the second fixing portion are the same or different.
- the three elastic arms are arranged in parallel.
- the stator assembly includes a coil whose axial direction in the horizontal plane is perpendicular to the vibration direction of the vibration assembly; the vibration assembly includes a vibration cavity, and the coil is located in the vibration cavity.
- the vibrating component includes:
- the magnetic circuit structure includes a magnetic group; the magnetic group is interposed and fixed between two mass blocks;
- the cavity formed by the two masses and the two sets of magnetic circuit structures is the vibration cavity.
- the utility model improves the structure of the elastic support.
- the stress on the connecting arm between the ends of the elastic arms can be effectively dispersed to each elastic arm, and then the elasticity of the elastic arms can be fully utilized.
- to provide better elastic support for the vibration of the vibration component improve the output vibration of the motor, so that the motor can obtain a better vibration effect, and improve the reliability and service life of the product.
- the utility model has lower elastic stress and higher stress fatigue limit, and has more obvious advantages in the design of ultra-narrow products with larger aspect ratios.
- the utility model also has the advantages of simple structure, convenient assembly and low production cost.
- Fig. 1 is the assembly drawing of the present utility model.
- Fig. 2 is a sectional view of the utility model.
- Fig. 3 is a schematic diagram of the overall structure of the elastic support of the present invention.
- Fig. 4 is a top view of the elastic support of the present invention.
- the linear vibration motor includes: a housing 10 and a vibration assembly 20 housed in the housing 10 , a stator assembly 30 and two motors for suspending the vibration assembly 20 on Two elastic supports 40 in the housing 10; the elastic supports 40 include elastic parts 41; the elastic parts 41 include three elastic arms formed by continuous bending in the vibration direction of the vibrating assembly 20; wherein, the first elastic The arm 411 and the third elastic arm 413 are located on both sides of the second elastic arm 412, and the projections of the three elastic arms on the vibration direction of the vibration assembly 20 coincide; at least two of the three elastic arms are arranged in parallel;
- the elastic support member 40 also includes a first fixing portion 42 and a second fixing portion 43 extending along the vibration direction of the vibration assembly 20; the first fixing portion 42 is connected and fixed to the end of the first elastic arm
- the first fixing part 42 is used to be combined and fixed with the housing 10; the second fixing part 43 is used to be combined and fixed with the vibration assembly 20; the first elastic arm 411 and the third elastic arm 413 are formed by the second elastic arm Two ends of 412 extend in opposite directions through connecting arms 414 .
- the first elastic arm 411 and the second elastic arm 412 are arranged in parallel, and the angle formed between the first fixing part 42 and the first elastic arm 411 is Less than 90 degrees, the third elastic arm 413 and the second elastic arm 412 are arranged in a non-parallel state close to each other, and the angle formed between the second fixing part 43 and the third elastic arm 413 is approximately 90 degrees.
- the third elastic arm is arranged in parallel with the second elastic arm, the first fixing part is parallel to the second fixing part, and the gap formed between the first fixing part and the first elastic arm
- the included angle can also be approximately 90 degrees.
- the coincidence of the projections of the three elastic arms on the vibration direction of the vibration assembly 20 is to illustrate that the three elastic arms are located on the same horizontal plane in the direction perpendicular to the vibration direction of the vibration assembly 20, and is not used to limit the three elastic arms.
- the structure is exactly the same.
- the above-mentioned structural description and limitation of the elastic support member 40 are only for the structural state of the elastic support member 40 when the vibrating assembly 20 is in a non-vibrating state.
- each elastic arm of the elastic support 40 will be elastically deformed in the vibration direction, thus the relative position and state of each elastic arm will change, but through the above-mentioned elastic support 40
- the stress on the connecting arm 414 between the ends of the elastic arms can be effectively distributed to each elastic arm, and then make full use of the elastic arms.
- the elastic support 40 provided by this embodiment has lower elastic stress and higher stress fatigue limit, and has more obvious advantages in the design of ultra-narrow products with larger aspect ratios. .
- the housing 10 includes a top wall 11, a bottom wall 12 opposite to the top wall 11, and a side wall 13 connecting the top wall 11 and the bottom wall 12, the top wall 11, the bottom
- the wall 12 and the side wall 13 enclose to form a receiving space, and the vibrating component 20 , the stator component 30 and the elastic supporting member 40 are stored in the receiving space.
- the side wall 13 includes two long sides arranged in parallel at intervals and two short sides arranged at both ends of the long sides and connecting the two long sides.
- the long sides and the short sides can be integrally formed or separately designed and fixedly connected.
- the top wall 11 and the side wall 13 are integrally formed, and the bottom wall 12 is directly covered on the side wall 13, which can facilitate the assembly of the linear vibration motor.
- the side wall can also be integrated with the bottom wall forming.
- the housing 10 provided in this embodiment can be made of magnetically permeable materials or non-magnetically permeable materials, which is not limited by the present invention.
- two elastic supports 40 are symmetrically arranged about the center of the vibrating assembly 20 .
- the elastic support member 40 is formed by continuous bending of a piece of sheet material.
- the elastic supporting member 40 has an integrated structure, which has the advantages of better dispersing stress, simpler manufacturing process, and more convenient assembly.
- connection mode between adjacent elastic arms and the connection mode between the elastic arm and the fixed part specifically, the ends of two adjacent elastic arms are connected through the connecting arm 414; the first fixed part 42 and the first elastic arm
- the arms 411 and the second fixing portion 43 and the third elastic arm 413 are respectively connected and fixed by bending arms 415 .
- At least one elastic arm of the first elastic arm 411 , the second elastic arm 412 and the third elastic arm 413 includes a missing portion 416 .
- the missing part 416 is used to adjust the stiffness of the elastic arm, which can effectively reduce the stiffness of the elastic arm in the vibration direction, so that the elastic arm is more compliant in the vibration direction, so that under the same driving force, the elastic support 40 The greater the vibration displacement in the vibration direction, the higher the vibration sense of the vibration motor can be achieved.
- each elastic arm of the first elastic arm 411, the second elastic arm 412 and the third elastic arm 413 includes a missing portion 416, and the missing portion 416 on the three elastic arms is in the The projections in the vibration direction of the vibrating assembly 20 are coincident or non-coincident.
- the missing portion 416 effectively reduces the stiffness of the three elastic arms in the vibration direction of the vibrating assembly 20 , and the positions and sizes of the missing portion 416 on the three elastic arms may be different.
- the extending direction of the first fixing portion and the extending direction of the second fixing portion are the same or different. That is to say, the extending direction of the first fixing portion and the second fixing portion can extend toward the inner side of the casing, or extend toward the outer side of the casing at the same time, or one of the first fixing portion and the second fixing portion faces toward the The inner side of the housing extends, and the other fixing part extends towards the outer side of the housing. Specifically, as shown in FIG. 4 , the first fixing portion 42 extends toward the inside of the casing 10 , and the second fixing portion 43 extends toward the inside of the casing 10 .
- the first elastic arm, the second elastic arm and the third elastic arm are arranged in parallel.
- the third elastic arm is arranged in parallel with the second elastic arm and the first elastic arm, then the first fixing part can be parallel to the second fixing part, and the angle formed between the first fixing part and the first elastic arm The angle is approximately 90 degrees, and the angle formed between the second fixing portion and the second elastic arm is approximately 90 degrees.
- the stator assembly 30 includes a coil 31 whose axial direction in the horizontal plane is perpendicular to the vibration direction of the vibration assembly 20; the vibration assembly 20 includes a vibration cavity, and the coil 31 is located in the vibration cavity . Further, it also includes a flexible circuit board 32 fixed on the bottom wall 12, the coil 31 is combined on the flexible circuit board 32 and conducts with the flexible circuit board 32, and the axis direction of the coil 31 is the same as the vibration direction of the vibration assembly 20. Vertically, the electrical connection board is pasted or buckled on the bottom wall 12 , and the linear vibration motor is connected to the external circuit through the pad on the flexible circuit board 32 .
- the vibrating assembly 20 includes: two mass blocks 21 arranged along the vibration direction of the vibrating assembly 20, and two sets of magnetic circuit structures 22 respectively located on two opposite sides of the coil 31; the magnetic circuit structures 22 It includes a magnetic group 221; the magnetic group 221 is sandwiched and fixed between two mass blocks 21; the two mass blocks 21 and two sets of magnetic circuit structures 22 surround the outside of the coil 31; the two mass The cavity formed by the block 21 and the two sets of magnetic circuit structures 22 together is the vibration cavity.
- Two elastic supports 40 are respectively fixed between the mass block 21 and the housing 10; and the coil 31 is located in the vibration cavity formed by the two mass blocks 21 and the two sets of magnetic circuit structures 22. .
- the mass block 21 is used to increase the inertia of the vibrating assembly 20 to improve the vibration feeling.
- the magnetic circuit structure 22 is used to provide a magnetic field.
- the coil 31 is located in the magnetic field of the two magnetic circuit structures 22.
- the magnetic circuit structure 22 and the coil 31 cooperate with each other to drive the vibration component 20 to reciprocate to form vibration feedback of the electronic product.
- the magnetic group 221 includes a central magnet and two side magnets located on both sides of the central magnet.
- the magnetic poles of the two side magnets are the same and opposite to the magnetic poles of the central magnet so as to form a driving force for driving the vibrating assembly 20 to and fro with the coil 31.
- the mass block 21 can be made of high-density metal materials such as tungsten steel block or nickel steel block or nickel-tungsten alloy, so as to increase the vibration force of the mass block 21 , making the vibration of electronic products more intense.
- the number of magnets in the magnetic group 221 can also be increased/decreased according to actual needs. For example, more than three magnets are combined in a certain way, and are arranged between the two magnetic groups 221.
- the corresponding coil 31 is used to enhance the force between the magnetic group 221 and the coil 31 , thereby enhancing the vibration feeling of the linear vibration motor.
- the magnetic circuit structure 22 also includes a magnetic permeable plate 222 fixed on the side of the magnetic group 221 away from the coil 31; The surface on one side of 31; the two magnetically conductive plates 222 are arranged symmetrically about the center.
- the magnetically conductive plate 222 is used to modify the magnetic induction lines, thereby enhancing the magnetic induction intensity at the side of the coil 31 .
- the magnetically conductive plate 222 is made of magnetically conductive material, which can play a magnetically conductive role, can avoid the scattering of magnetic induction lines, strengthen the Lorentz force, and can effectively increase the vibration force of the vibrating assembly 20 size to increase the vibration effect.
- the magnetically conductive plate 222 at least covers the surface of the magnetic group 221 on a side away from the coil 31 , so as to avoid the scattering of magnetic induction lines.
- the magnetic guide plate 222 should also cover the mass block while ensuring that the outer surface of the magnetic group 221 is covered. 21 outer wall 13 faces.
- the two magnetically conductive plates 222 are arranged symmetrically about the center.
- the shape of the magnetically conductive plate 222 can be a plate structure, or other structures adapted to the magnetic group 221, as long as the components that can modify the shape of the magnetic induction line and enhance the magnetic induction intensity at the coil are all included in the description , the utility model does not limit this.
- the above-mentioned linear vibration motor may also include other structural components, which will not be repeated here.
- the utility model improves the structure of the elastic support, and when the vibrating assembly vibrates, the stress on the connecting arm between the ends of the elastic arms can be effectively dispersed to each elastic arm, and then fully utilized
- the elasticity of the elastic arm provides better elastic support for the vibration of the vibrating component and improves the output vibration feeling of the motor, thereby enabling the motor to obtain a better vibration effect and improving the reliability and service life of the product.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
本实用新型提供一种线性振动马达，包括壳体以及收容于所述壳体内的振动组件、定子组件及两个用以将振动组件悬置在壳体内的两个弹性支撑件；所述弹性支撑件包括弹性部；所述弹性部包括在振动组件振动方向连续弯折形成的三个弹臂；三个弹臂在所述振动组件振动方向上的投影重合；三个弹臂中的至少两个弹臂呈平行配置；所述弹性支撑件还包括有沿所述振动组件振动方向延伸设置的第一固定部以及第二固定部。本实用新型通过对马达结构中弹性支撑件结构的改进，可获得更佳的振动效果，提升了产品的可靠性以及使用寿命。
Description
本实用新型涉及电子产品技术领域。更具体地，涉及一种线性振动马达。
随着通信技术的发展，便携式电子产品，如手机、掌上游戏机或者掌上多媒体娱乐设备等进入人们的生活。在这些便携式电子产品中，一般会用振动马达来做系统反馈，例如手机的来电提示、游戏机的振动反馈等。
现有的线性振动马达通常都包括收容于壳体内的振动组件和弹性支撑件。弹性支撑件用于将所述振动组件悬浮于所述壳体内，其不仅要为振动组件提供回复力，还要提供悬浮于空间的支撑力。针对目前现有的线性振动马达来讲，其中的弹性支撑件结构具有较高的应力，导致现有的线性振动马达的振动效果较差，不能很好的满足人们的需求。
实用新型内容
针对上述问题，本实用新型提供一种线性振动马达，通过对马达结构中弹性支撑件结构的改进，获得更佳的振动效果，提升了产品的可靠性以及使用寿命。
为实现上述目的，本实用新型采用下述技术方案：
本实用新型提供一种线性振动马达，包括：
壳体以及收容于所述壳体内的振动组件、定子组件及两个用以将振动组件悬置在壳体内的两个弹性支撑件；
所述弹性支撑件包括弹性部；
所述弹性部包括在振动组件振动方向连续弯折形成的三个弹臂；
其中，第一弹臂与第三弹臂位于第二弹臂的两侧；三个弹臂在所述振动组件振动方向上的投影重合；三个弹臂中的至少两个弹臂呈平行配置；
所述弹性支撑件还包括有沿所述振动组件振动方向延伸设置的第一固定部以及第二固定部；
所述第一固定部连接固定于所述第一弹臂端部上；
所述第二固定部连接固定于所述第三弹臂端部上。
此外，优选地方案是，两个弹性支撑件关于所述振动组件的中心呈中心对称设置。
此外，优选地方案是，所述弹性支撑件由一块片材连续弯折形成。
此外，优选地方案是，相邻两个弹臂端部之间通过连接臂连接；第一固定部与第一弹臂之间以及第二固定部与第三弹臂之间分别通过弯折臂连接固定。
此外，优选地方案是，三个弹臂中的至少一个弹臂上包括有缺失部。
此外，优选地方案是，三个弹臂的每个弹臂上均包括有缺失部，三个弹臂上的缺失部在所述振动组件振动方向上的投影重合或者不重合。
此外，优选地方案是，第一固定部的延伸方向以及第二固定部的延伸方向相同或者不同。
此外，优选地方案是，三个弹臂之间均呈平行设置。
此外，优选地方案是，所述定子组件包括水平面内轴线方向垂直所述振动组件振动方向的线圈；所述振动组件包括有振动腔，所述线圈位于所述振动腔内。
此外，优选地方案是，所述振动组件包括：
沿振动组件振动方向排列的两个质量块，以及
分别位于线圈两相对边侧的两组磁路结构；
所述磁路结构包括磁组；所述磁组被夹设固定在两个质量块之间；
两个所述质量块以及两组磁路结构共同围合形成的腔体为所述振动腔。
本实用新型的有益效果为：
本实用新型通过对弹性支撑件的结构进行改进，在振动组件振动时，弹臂端部之间连接臂上所受的应力能够被有效的分散至各弹臂上，进而充分利用弹臂的弹性，为振动组件振动提供更佳的弹性支撑，提高马达的输出振感，使得马达可获得更佳的振动效果，提升了产品的可靠性以及使用寿命。与现有技术相比，本实用新型具有更低的弹性应力，以及更高的应力疲劳极限，在长宽比更大的超窄型产品设计中优势更明显。另外本实用新型还具有结构简单，组装方便以及生产成本低的优点。
下面结合附图对本实用新型的具体实施方式作进一步详细的说明。
图1是本实用新型的装配图。
图2是本实用新型的剖面图。
图3是本实用新型的弹性支撑件的整体结构示意图。
图4是本实用新型的弹性支撑件的俯视图。
现在将参照附图来详细描述本实用新型的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本实用新型的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本实用新型及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术和设备可能不作详细讨论，但在适当情况下，所述技术和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
本实用新型提供一种线性振动马达，通过对马达结构中弹性支撑件结构的改进，获得更佳的振动效果，提升了产品的可靠性以及使用寿命。结合图1至图4所示，具体地所述线性振动马达包括：壳体10以及收容于所述壳体10内的振动组件20、定子组件30及两个用以将振动组件20悬置在壳体10内的两个弹性支撑件40；所述弹性支撑件40包括弹性部41；所述弹性部41包括在振动组件20振动方向连续弯折形成的三个弹臂；其中，第一弹臂411与第三弹臂413位于第二弹臂412的两侧，三个弹臂在所述振动组件20振动方向上的投影重合；三个弹臂中的至少两个弹臂呈平行配置；所述弹性支撑件40还包括有沿所述振动组件20振动方向延伸设置的第一固定部42以及第二固定部43；所述第一固定部42连接固定于所述第一弹臂411端部上；所述第二固定部43连接固定于所述第三弹臂413端部上。在本实施例中，第一固定部42用以与壳体10结合固定；第二固定部43用以与振动组件20结合固定；第一弹臂411与第三弹臂413由第二弹臂412的两端通过连接臂414向相反方向延伸。
具体地，参照图4所示，本实施方式中，所述第一弹臂411与第二弹臂412之间呈平行设置，第一固定部42与第一弹臂411之间形成的夹角小于90度，第三弹臂413与第二弹臂412之间呈相互靠近的非平行状态设置，第二固定部 43与第三弹臂413之间形成的夹角大致呈90度。本领域技术人员可以理解的是，当第三弹臂与第二弹臂之间呈平行设置时，第一固定部与第二固定部平行，第一固定部与第一弹臂之间形成的夹角也可大致呈90度。另外，三个弹臂在所述振动组件20振动方向上的投影重合是为了说明三个弹臂在垂直于振动组件20振动方向的方向上位于同一水平面上，并非用以限制三个弹臂的结构完全相同。
需要说明的是，上述的对于所述弹性支撑件40的结构描述以及限定，仅针对振动组件20呈非振动状态时的弹性支撑件40的结构状态，本领域技术人员可以理解的是，当所述振动组件20振动时，弹性支撑件40的各弹臂会在振动方向上发生弹性变形，由此各弹臂之间的相对位置以及状态均会发生变化，但通过上述的对于弹性支撑件40的关于各弹臂之间结构特征的限定，在振动组件20振动时，弹臂端部之间连接臂414上所受的应力能够被有效的分散至各弹臂上，进而充分利用弹臂的弹性，为振动组件20振动提供更佳的弹性支撑，提高马达的输出振感。由此本实施方式所提供的弹性支撑件40与现有技术相比，具有更低的弹性应力，以及更高的应力疲劳极限，在长宽比更大的超窄型产品设计中优势更明显。
在图1所示的一个实施方式中，所述壳体10包括顶壁11、与顶壁11相对设置的底壁12以及连接顶壁11和底壁12的侧壁13，顶壁11、底壁12及侧壁13围合形成收容空间，振动组件20、定子组件30以及弹性支撑件40收容于收容空间内。侧壁13包括两平行间隔设置的长边以及设于长边两端并连接两个长边的两个短边，长边和短边可以采用一体成型，也可以采用分体式设计并固定连接。在本实施方式中，顶壁11与侧壁13一体成型，底壁12直接盖设于侧壁13上，可以方便线性振动马达的装配，在其他实施方式中，侧壁还可以与底壁一体成型。并且本实施方式所提供的壳体10可以采用导磁材料制成，也可以为非导磁材料制成，本实用新型对此并不做限制。
为了确保振动组件20在振动过程中的平衡性，避免发生偏振，在一具体的实施方式中，两个弹性支撑件40关于所述振动组件20的中心呈中心对称设置。
在一具体的实施方式中，所述弹性支撑件40由一块片材连续弯折形成。在本实施方式中，弹性支撑件40为一体式结构，其优势在于，能够更好的将应力分散，并且制作工艺更简便，装配起来也更方便。
关于相邻弹臂之间的连接方式以及弹臂与固定部之间的连接方式，具体 地，相邻两个弹臂端部之间通过连接臂414连接；第一固定部42与第一弹臂411之间以及第二固定部43与第三弹臂413之间分别通过弯折臂415连接固定。
在一可选的实施方式中，第一弹臂411、第二弹臂412以及第三弹臂413中的至少一个弹臂上包括有缺失部416。缺失部416用以调节弹臂的刚度，其能够有效减小弹臂在振动方向的刚度，使得弹臂在振动方向顺性更大，可使得在同样驱动力的情况下，弹性支撑件40在振动方向获得更大的振动位移，可使振动马达达到更高的振感。
在一具体的实施方式中，第一弹臂411、第二弹臂412以及第三弹臂413中每个弹臂上均包括有缺失部416，三个弹臂上的缺失部416在所述振动组件20振动方向上的投影重合或者不重合。缺失部416有效减小三个弹臂在振动组件20振动方向上的刚度，且在三个弹臂上的缺失部416的形成位置以及尺寸大小可以不相同。
在一可选的实施方式中，第一固定部的延伸方向以及第二固定部的延伸方向相同或者不同。也就是说，第一固定部以及第二固定部的延伸方向可同时朝向壳体内侧方向延伸，或者同时朝向壳体外侧方向延伸，或者第一固定部以及第二固定部中的一个固定部朝向壳体内侧方向延伸，另一个固定部朝向壳体外侧方向延伸。具体地，如图4所示，第一固定部42朝向壳体10内侧方向延伸，第二固定部43朝向壳体10内侧方向延伸。
在一具体的实施方式中，第一弹臂、第二弹臂以及第三弹臂之间呈平行设置。当第三弹臂与第二弹臂及第一弹臂之间呈平行设置时，那么第一固定部可与第二固定部平行，第一固定部与第一弹臂之间形成的夹角大致呈90度，第二固定部与第二弹臂之间形成的夹角大致呈90度。
基于线性振动马达的振动原理：线圈通过柔性电路板通交流电流产生的驱动力使所述振动组件振动。在一具体的实施方式中，所述定子组件30包括水平面内轴线方向垂直所述振动组件20振动方向的线圈31；所述振动组件20包括有振动腔，所述线圈31位于所述振动腔内。进一步地，其还包括固定在底壁12上的柔性电路板32，线圈31结合在柔性电路板32上并与柔性电路板32导通，且线圈31的轴线方向与振动组件20的振动方向相垂直，电连接板粘贴或者扣合在底壁12上，线性振动马达通过柔性电路板32上的焊盘与外部电路导通。
在本实施方式中，所述振动组件20包括：沿振动组件20振动方向排列的两个质量块21，以及分别位于线圈31两相对边侧的两组磁路结构22；所述磁 路结构22包括磁组221；所述磁组221被夹设固定在两个质量块21之间；两个所述质量块21以及两组磁路结构22围绕在所述线圈31外侧；两个所述质量块21以及两组磁路结构22共同围合形成的腔体为所述振动腔。两个弹性支撑件40分别固定在所述质量块21与所述壳体10之间；且上述线圈31位于两个所述质量块21以及两组磁路结构22共同围合形成的振动腔内。所述质量块21用于增大振动组件20的惯性，以提升振感。所述磁路结构22用于提供磁场，所述线圈31位于两个磁路结构22的磁场中，磁路结构22与线圈31相互配合，以驱动振动组件20往复移动形成电子产品的振动反馈，其中，磁组221包括一个中心磁体以及位于中心磁体两侧的两个边磁体，两个边磁体磁极相同且与中心磁体磁极相反以便与线圈31形成驱动振动组件20往复运动的驱动力，需要说明的是，为加强线性振动马达的振感及质量块21的振动平衡，质量块21可以采用钨钢块或镍钢块或者镍钨合金等高密度金属材料制成，加大质量块21振动力，使电子产品的振动更加强烈。
本实用新型在具体应用的过程中，也可以根据实际的需要增加/减少磁组221的磁体个数，比如，采用超过三块以上的磁体按照一定方式组合，并在两磁组221之间设置对应的线圈31，以增强磁组221和线圈31之间的作用力，进而增强线性振动马达的振感。
更进一步地，所述磁路结构22还包括结合固定于所述磁组221的背离所述线圈31一侧的导磁板222；所述导磁板222至少覆盖所述磁组221的背离线圈31一侧的表面；两个所述导磁板222呈中心对称设置。导磁板222用来修正磁感线，进而增强线圈31侧的磁感应强度。在本实施例中，所述导磁板222由导磁材料制成，可以起到导磁作用，可以避免磁感线的外散，加强洛伦兹力，可有效加大振动组件20振动力的大小，增加振动效果。具体地，所述导磁板222至少覆盖所述磁组221背离所述线圈31一侧的表面，以避免磁感线的外散。为了提高所述磁组221与质量块21之间的结合强度，提高所述线性振动马达的使用寿命，所述导磁板222在保证覆盖所述磁组221外侧表面的同时还应覆盖质量块21的外侧壁13面。在本实施例中，结合图1所示，两个所述导磁板222呈中心对称设置。另外，导磁板222的形状可以是板状结构，也可以是与磁组221适配的其他结构，只要能够起到修正磁感线形状以及增强线圈处磁感应强度作用的部件均在描述之列，本实用新型对此不做限制。在本实用新型中，上述线性振动马达还可包括其他结构件，在此不再赘述。
综上所述，本实用新型通过对弹性支撑件的结构改进，在振动组件振动时， 弹臂端部之间连接臂上所受的应力能够被有效的分散至各弹臂上，进而充分利用弹臂的弹性，为振动组件振动提供更佳的弹性支撑，提高马达的输出振感，由此可使马达获得更佳的振动效果，提升了产品的可靠性以及使用寿命。
显然，本实用新型的上述实施例仅仅是为清楚地说明本实用新型所作的举例，而并非是对本实用新型的实施方式的限定，对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动，这里无法对所有的实施方式予以穷举，凡是属于本实用新型的技术方案所引伸出的显而易见的变化或变动仍处于本实用新型的保护范围之列。
Claims (10)
- 一种线性振动马达，包括壳体以及收容于所述壳体内的振动组件、定子组件及两个用以将振动组件悬置在壳体内的两个弹性支撑件；其特征在于，所述弹性支撑件包括弹性部；所述弹性部包括在振动组件振动方向连续弯折形成的三个弹臂；其中，第一弹臂与第三弹臂位于第二弹臂的两侧；三个弹臂在所述振动组件振动方向上的投影重合；三个弹臂中的至少两个弹臂呈平行配置；所述弹性支撑件还包括有沿所述振动组件振动方向延伸设置的第一固定部以及第二固定部；所述第一固定部连接固定于所述第一弹臂端部上；所述第二固定部连接固定于所述第三弹臂端部上。
- 根据权利要求1所述的线性振动马达，其特征在于，两个弹性支撑件关于所述振动组件的中心呈中心对称设置。
- 根据权利要求1所述的线性振动马达，其特征在于，所述弹性支撑件由一块片材连续弯折形成。
- 根据权利要求1所述的线性振动马达，其特征在于，相邻两个弹臂端部之间通过连接臂连接；第一固定部与第一弹臂之间以及第二固定部与第三弹臂之间分别通过弯折臂连接固定。
- 根据权利要求1所述的线性振动马达，其特征在于，三个所述弹臂中的至少一个弹臂上包括有缺失部。
- 根据权利要求1所述的线性振动马达，其特征在于，三个所述弹臂的每个弹臂上均包括有缺失部，三个弹臂上的缺失部在所述振动组件振动方向上的投影重合或者不重合。
- 根据权利要求1所述的线性振动马达，其特征在于，第一固定部的延伸方向以及第二固定部的延伸方向相同或者不同。
- 根据权利要求1所述的线性振动马达，其特征在于，三个弹臂之间均呈平行设置。
- 根据权利要求1所述的线性振动马达，其特征在于，所述定子组件包括水平面内轴线方向垂直所述振动组件振动方向的线圈；所述振动组件包括有振动腔，所述线圈位于所述振动腔内。
- 根据权利要求9所述的线性振动马达，其特征在于，所述振动组件包括：沿振动组件振动方向排列的两个质量块，以及分别位于线圈两相对边侧的两组磁路结构；所述磁路结构包括磁组；所述磁组被夹设固定在两个质量块之间；两个所述质量块以及两组磁路结构共同围合形成的腔体为所述振动腔。
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