WO2018107737A1 - 线性振动马达 - Google Patents
线性振动马达 Download PDFInfo
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- WO2018107737A1 WO2018107737A1 PCT/CN2017/092494 CN2017092494W WO2018107737A1 WO 2018107737 A1 WO2018107737 A1 WO 2018107737A1 CN 2017092494 W CN2017092494 W CN 2017092494W WO 2018107737 A1 WO2018107737 A1 WO 2018107737A1
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- vibration motor
- elastic support
- linear vibration
- mass
- lower case
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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 present invention relates to the field of portable electronic products, and more particularly to a linear vibration motor.
- micro-vibration motors are generally used for system feedback, such as incoming call prompts of mobile phones, vibration feedback of game machines, and the like.
- system feedback such as incoming call prompts of mobile phones, vibration feedback of game machines, and the like.
- various internal components also need to adapt to this trend, and micro-vibration motors are no exception.
- the existing micro-vibration motor generally includes an upper cover, a lower cover that forms a vibration space with the upper cover, a vibrator (including a mass and a permanent magnet) that linearly reciprocates in the vibration space, connects the upper cover, and reciprocates the vibrator A vibrating elastic support and a coil located a distance below the vibrator.
- a vibrator including a mass and a permanent magnet
- the elastic support members are commonly used with springs or springs, vibration motors of different shapes and different performances, and the design of the shape and size of the springs or springs are also different.
- the shrapnel of a square or rectangular motor is usually fixed between the mass and the side wall of the housing, and the assembly precision between the elastic support and the mass and the housing is high, and it is impossible to ensure complete symmetry.
- the polarization phenomenon is highly prone to occur, causing the mass to collide with the casing, the product stability is poor, the production efficiency is low, and the cost is high.
- an object of the present invention is to provide a linear vibration motor to solve the problems of time-consuming and costly construction of the elastic support member, low assembly efficiency, and high cost.
- the linear vibration motor provided by the present invention comprises a linear vibration motor, comprising an upper casing, a lower casing adapted to be coupled to the upper casing, and a vibration system housed between the upper casing and the lower casing: the upper casing includes a side opening, and the lower casing is coupled to a side opening of the upper casing; two elastic branches are disposed on a side of the lower casing facing the upper casing The struts, the vibration system is fixed between the elastic supports.
- a preferred structure is that the upper case has a rectangular parallelepiped structure, the elastic support members are symmetrically distributed, and the elastic support member and the lower case are integrally formed.
- each of the elastic support members includes a fixing portion fixedly coupled to the vibration system, a joint portion coupled to the lower case, and a connecting arm for connecting the fixing portion and the joint portion; the joint portion and the lower case The combined positions are respectively located at both ends of the lower case.
- a preferred structure is that the joint portions are respectively located at two opposite corners of the lower case; and, the elastic support members are symmetrically distributed centrally with respect to the center of the lower case.
- a preferred structure is that the fixing portions of the elastic support members are parallel to each other and are perpendicular to the lower case.
- the elastic support member has a "one" shape structure, and the fixing portions are respectively fixedly connected to the upper and lower end faces of the mass block; or the elastic support member is an "L” type structure, and the fixing portion and the connecting arm are There is a bend between them, and the fixing portions are respectively fixedly connected to both ends of the mass in the long axis direction.
- the vibration system includes a mass and a permanent magnet embedded inside the mass; and the permanent magnets are asymmetrically distributed in a plane perpendicular to the vibration direction of the mass.
- a stator system is further included; the stator system includes a flexible circuit board and stator coils fixed to the flexible circuit board and conducting with the flexible circuit board; the axial direction of the stator coil is perpendicular to the vibration direction of the vibration system.
- a preferred structure is that an extended pad is disposed on the flexible circuit board, and an angle between the pad and the flexible circuit board is adjustable; a gap is formed at a position corresponding to the pad of the upper case, and the pad is from the notch. It is taken out and turned on with an external circuit.
- a preferred structure is that the pad and the upper case are fixed by SMT assembly.
- the upper case is a magnetic conductive member.
- the above linear vibration motor two elastic supporting members are arranged on the lower shell on the side, and the vibration system is fixed between the elastic supporting members, so that the vibration system can be better fixed, the magnetic circuit driving force is increased, and the mass is not easy. Collision with the housing, product stability.
- the upper case has a rectangular parallelepiped structure, so that the space utilization rate is high, the elastic support members are symmetrically distributed, so that polarization is not easily generated, and the elastic support member and the linear vibration motor housing (lower case) are integrally configured, which not only saves Material cost can also simplify the product assembly process, improve product production efficiency, and save production costs without reducing product performance.
- FIG. 1 is an exploded view of a linear vibration motor in accordance with an embodiment of the present invention
- Figure 2 is a cross-sectional view taken along line A of Figure 1;
- Figure 3 is a cross-sectional view taken along line B of Figure 1;
- 4-1 is a schematic view showing the structure of a lower case according to an embodiment of the present invention.
- 4-2 is a schematic view showing the structure of a lower case according to another embodiment of the present invention.
- Reference numerals include: upper case 1, notch 11, mass 2, permanent magnet 3, stator coil 4, flexible circuit board 5, pad 51, lower case 6, elastic support member 7, joint portion 71, connecting arm 72.
- the fixing portion 73 includes: upper case 1, notch 11, mass 2, permanent magnet 3, stator coil 4, flexible circuit board 5, pad 51, lower case 6, elastic support member 7, joint portion 71, connecting arm 72.
- the fixing portion 73 includes: upper case 1, notch 11, mass 2, permanent magnet 3, stator coil 4, flexible circuit board 5, pad 51, lower case 6, elastic support member 7, joint portion 71, connecting arm 72.
- the fixing portion 73 The fixing portion 73.
- weights both of which refer to high quality, high density metal blocks that are fixed with vibration generating vibration blocks to enhance vibration balance.
- the invention is mainly used for the improvement of the micro vibration motor, but does not exclude the application of the technique of the invention to a large vibration motor.
- linear vibration motor and “micro vibration motor” have the same meanings.
- FIGS. 2 and 3 respectively show cross-sectional structures of a linear vibration motor according to an embodiment of the present invention from different angles.
- the linear vibration motor of the embodiment of the present invention comprises an upper casing 1 of a rectangular parallelepiped structure, a lower casing 6 of a plate-like structure that is fitted to the upper casing 1, and is housed in the upper casing 1 and below.
- a vibration system between the shells 6 wherein the upper shell 1 is a side opening structure, the lower shell 6 is joined at the opening of the upper shell 1, the upper shell 1 and the lower shell 6 together form a space for accommodating the vibration system;
- the side is provided with two symmetrically distributed elastic supporting members 7, and the vibration system is suspended between the two elastic supporting members 7, and reciprocates under the action of the resonance and restoring force provided by the elastic supporting members 7, thereby realizing the vibration of the linear vibration motor.
- the plane of the lower casing 6 is parallel to the vibration direction of the linear vibration motor.
- the upper and lower casings do not mean that the upper casing must be located above the lower casing, and the lower casing is substantially the side casing.
- the two elastic support members 7 and the lower shell 6 are integrally formed, and the two are integrally formed.
- the elastic support member 7 further includes a joint portion coupled to the lower case 6, a fixing portion fixedly coupled to the vibration system, and a connecting arm (elastic connecting arm) between the joint portion and the fixing portion, the connecting arm being combined with the lower case 6
- the position of the joint is the position of the joint portion, and the two joint portions are respectively located at the two ends of the lower shell 6; preferably, the positions where the joint arm and the lower shell are combined can be respectively disposed at two opposite corners of the lower shell, thereby making the two
- the elastic support members 7 are symmetrically distributed about the center point of the lower case 6 to prevent polarization of the vibration system.
- the fixing portions of the two elastic supporting members 7 are parallel to each other and are perpendicular to the lower casing 6; in addition, in order to prevent the vibration system from colliding with the lower casing 6 during the vibration,
- the joint portion is disposed as a planar structure extending from a plane of the lower casing 6 and perpendicular to the lower casing 6, and the length of the joint portion may be set according to the size of the vibration system, and the length between the joint arm and the lower shell 6 is adjusted by the length of the joint portion. The distance is such that the vibration system is kept away from the lower casing 6 and suspended on one side of the lower casing 6.
- the two elastic supporting members 7 can be respectively disposed in a "one" shape structure, and the two fixing portions are respectively fixedly connected with the upper and lower end faces of the mass block 2, and the upper and lower end faces of the mass block 2 are referred to as mass blocks.
- the vibration direction of 2 is perpendicular to the upper and lower sides of the Z-axis direction.
- the two elastic supporting members may be disposed in an "L"-type structure, and the fixing portion and the connecting arm are bent, that is, the fixing portion and the plane of the joint portion are perpendicular to each other, and the fixing portion and the mass block are respectively along the long axis direction. Fixed connection at both ends.
- the long axis direction of the mass is in the same horizontal plane, and the largest axial direction of the mass along the X-axis or the Y-axis direction is generally the X-axis direction of the mass, or the length direction; correspondingly, the short axis of the mass
- the direction is the same horizontal plane, the smallest dimension of the mass along the X-axis or the Y-axis direction, generally the Y-axis direction of the mass, or the width direction.
- Figure 4-1 shows a lower shell structure in accordance with an embodiment of the present invention.
- the lower case 6 is a long-direction plate-like structure, and symmetrically distributed elastic support members, elastic support members and lower case 6 are respectively connected to the upper left corner and the lower right corner of the lower case 6.
- the two are integrally formed;
- the elastic support member includes a joint portion 71 combined with the lower shell, a fixing portion 73 (free end) connected to the vibration system, and a connection between the joint portion 71 and the fixing portion 73.
- the arm 72 has a connecting arm of one arm or two arms symmetrically distributed.
- the planes of the joint portion 71 and the fixing portion 73 are parallel to each other, and both of them are perpendicular to the plane of the lower shell, and the fixing portions 73 are fixedly connected to the upper and lower end faces of the mass.
- FIG. 4-2 illustrates a lower shell structure in accordance with another embodiment of the present invention.
- the lower case 6 is a long-direction plate-like structure, and symmetrically distributed elastic support members are respectively connected to the upper left corner and the lower right corner of the lower case 6, and the elastic support member and the lower case 6 are respectively connected.
- the two are integrally formed;
- the elastic support member includes a joint portion 71 combined with the lower shell, a fixing portion 73 connected to the vibration system, and a connecting arm 72 between the joint portion 71 and the fixing portion 73, and connected
- the arm is an arm or two arms that are symmetrically distributed.
- the joint portion 71 and the plane of the fixing portion 73 are perpendicular to each other, and both of them are perpendicular to the plane of the lower shell 6, and the fixing portions 73 are fixedly connected to the ends of the mass in the longitudinal direction.
- a stator system is further included between the upper case 1 and the lower case 6.
- the stator system includes a flexible circuit board 5 and is fixed to The stator coil 4 on the flexible circuit board 5 and electrically connected to the flexible circuit board 5, the axial direction of the stator coil 4 is perpendicular to the vibration direction of the vibration system.
- the axial direction of the stator coil 4 is the central axis direction of the columnar body formed by the designated sub-coil 4, which is perpendicular to the vibration direction of the mass.
- part of the structure of the flexible circuit board 5 is located in the housing of the linear vibration motor (including the upper case 1 and the lower case 6) for conducting with the stator coil 4, and another part of the structure is taken out from the housing for external circuit Turn on.
- the extended circuit board 5 is provided with the extended pad 51, and the angle between the pad 51 and the flexible circuit board 5 is adjustable; the pad 51 can be suspended outside the housing or with the outer casing
- the sidewalls are fixedly attached.
- the pads can be fixedly connected to the outer sidewall of the housing by SMT (Surface Mount Technology), which makes the product more flexible and convenient to use.
- a notch 11 is provided at a position corresponding to the pad 51 of the upper case 1.
- the width and thickness of the notch 11 are not less than the width and thickness of the pad 51, and the pad 51 is taken out from the notch 11 and is connected to an external circuit or terminal.
- the circuit of the device is turned on to achieve the connection of the internal and external circuits of the linear vibration motor.
- the housing in which the stator coil 4 is located is a magnetic conductive member, that is, the upper coil 1 to which the stator coil 4 is fixed by the flexible circuit board 5 is used.
- the magnetic material is made of the magnetic material, and the upper magnetic material not only can gather the magnetic lines of force passing through the stator coil 4, but also can enhance the magnetic field of the product, improve the response speed, increase the vibration of the product, and improve the user experience.
- the vibration system includes the mass 2 and the permanent magnets 3 embedded inside the mass 2; and the permanent magnets 3 are asymmetrically distributed in a plane perpendicular to the vibration direction of the mass 2.
- a limit groove is provided on a side of the mass 2 parallel to the vibration direction of the linear vibration motor, and the permanent magnet 3 is fixed in the limit groove; the stator coil 4 is fixed to the case corresponding to the position of the permanent magnet 3.
- the asymmetric magnet of the asymmetric structure can reduce its occupation of the mass space, increase the quality of the vibration system, reduce the resonance frequency of the linear vibration motor, and improve the vibration of the product.
- the Huasi at both ends of the permanent magnet and gather the magnetic lines through the Huasi to improve the performance of the product.
- the upper and lower sides of the permanent magnet along the vibration direction are respectively provided with a washer, and the size of the washer is consistent with the cross-sectional dimension of the permanent magnet, and the magnetic lines passing through the stator coil are gathered by the washer, thereby The product achieves greater magnetic flux and greater vibrational effects.
- the mass 2 in each embodiment of the present invention may be made of a high-density metal material such as a tungsten steel block or a nickel steel block or a nickel-tungsten alloy.
- the vibration force makes the vibration of the electronic product more intense.
- the linear vibration motor provided by the present invention has the following advantages:
- Two elastic support members are arranged on the lower shell on the side, and the vibration system is fixed between the elastic support members, so that the vibration system can be better fixed, the magnetic circuit driving force is increased, and the mass is not easily generated with the casing. Collision, product stability is good;
- the upper shell has a rectangular parallelepiped structure, which makes the space utilization high, the elastic support members are symmetrically distributed, so that the polarization is not easy to occur, and the elastic support member and the housing of the linear vibration motor are arranged in an integrated structure. It can save materials, reduce production costs, and improve product assembly efficiency and production efficiency;
- the permanent magnet is fixed in the limiting groove of the mass, and there is no overlapping part in the vibration direction, which is beneficial to reduce the encroachment of the mass and increase the quality and vibration of the vibration system.
- the casing is magnetically permeable. Material, optimize magnetic field, shorten product response time, increase the vibration of linear vibration motor, and improve user experience;
- the pad can be suspended outside the housing or fixed to the side wall of the housing.
- the pad can be fixedly connected to the outer sidewall of the housing through the SMT, which makes the product more flexible and convenient to use.
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Abstract
一种线性振动马达，包括上壳（1）、与上壳（1）适配连接的下壳（6）、收容在上壳（1）和下壳（6）之间的振动***；上壳（1）包括侧开口，下壳（6）结合在上壳（1）的侧开口处；在下壳（6）的面对上壳（1）的侧面上设置有两个弹性支撑件（7），振动***固定在弹性支撑件（7）之间。利用上述方案能够节省弹性支撑件的物料成本，提高产品装配效率。
Description
本发明涉及便携式电子产品技术领域，更为具体地，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，一般会用微型振动马达来做***反馈，例如手机的来电提示、游戏机的振动反馈等。然而，随着电子产品的轻薄化发展趋势，其内部的各种元器件也需适应这种趋势，微型振动马达也不例外。
现有的微型振动马达，一般包括上盖、和与上盖形成振动空间的下盖、在振动空间内做直线往复振动的振子(包括质量块和永磁铁)、连接上盖并使振子做往复振动的弹性支撑件、以及位于振子下方一段距离的线圈。
目前，弹性支撑件常见的有弹片或弹簧，不同外形与不同性能的振动马达，对弹片或弹簧的外形与尺寸的设计也是各不相同。在现有技术中，方形或者长方形马达的弹片通常固定在质量块和壳体侧壁之间，弹性支撑件与质量块和壳体之间的装配精度要求较高，在不能确保完全其对称的情况下，极易出现偏振现象，导致质量块与壳体发生碰撞，产品稳定性差，生产效率低、成本高。
发明内容
鉴于上述问题，本发明的目的是提供一种线性振动马达，以解决目前弹性支撑件结构费时费料、产品装配效率低、成本高等问题。
本发明提供的线性振动马达，包括线性振动马达，包括上壳、与上壳适配连接的下壳、收容在上壳和下壳之间的振动***：上壳包括侧开口，下壳结合在上壳的侧开口处；在下壳的面对所述上壳的侧面上设置有两个弹性支
撑件，振动***固定在弹性支撑件之间。
此外，优选的结构是，上壳为长方体结构，弹性支撑件对称分布，并且，弹性支撑件与下壳为一体成型结构。
此外，优选的结构是，弹性支撑件的每个包括与振动***固定连接的固定部、与下壳相结合的结合部、以及用于连接固定部和结合部的连接臂；结合部与下壳相结合的位置分别位于下壳的两端。
此外，优选的结构是，结合部分别位于下壳的两个对角处；并且，弹性支撑件关于下壳的中心呈中心对称分布。
此外，优选的结构是，弹性支撑件的固定部相互平行，且均与下壳相垂直。
此外，优选的结构是，弹性支撑件为“一”字型结构，固定部分别与质量块的上下两个端面固定连接；或者，弹性支撑件为“L”型结构，固定部与连接臂之间存在弯折，固定部分别与质量块沿长轴方向的两端固定连接。
此外，优选的结构是，振动***包括质量块和嵌设在质量块内部的永磁铁；并且，永磁铁在与质量块的振动方向相垂直的平面内呈非对称分布。
此外，优选的结构是，还包括定子***；定子***包括柔性电路板和固定在柔性电路板上并与柔性电路板导通的定子线圈；定子线圈的轴线方向与振动***的振动方向相垂直。
此外，优选的结构是，在柔性电路板上设置有延伸出的焊盘，焊盘与柔性电路板之间的角度可调；在上壳对应焊盘的位置设置有缺口，焊盘从缺口内引出，并与外部电路导通。
此外，优选的结构是，焊盘与上壳通过SMT装配固定。
此外，优选的结构是，上壳为导磁件。
利用上述线性振动马达，将两个弹性支撑件设置在位于侧面的下壳上，振动***固定在弹性支撑件之间，从而可以更好的固定振动***，增加磁路驱动力，质量块不容易与壳体发生碰撞，产品稳定性好。进一步地，上壳为长方体结构，使得空间利用率高，弹性支撑件对称分布，使得不容易出现偏振，并且弹性支撑件与线性振动马达的壳体(下壳)设置为一体结构，不仅能够节省物料成本，还可以简化产品装配工艺，提高产品生产效率，在不降低产品性能的前提下节约生产成本。
为了实现上述以及相关目的，本发明的一个或多个方面包括后面将详细说明的特征。下面的说明以及附图详细说明了本发明的某些示例性方面。然而，这些方面指示的仅仅是可使用本发明的原理的各种方式中的一些方式。此外，本发明旨在包括所有这些方面以及它们的等同物。
通过参考以下结合附图的说明，并且随着对本发明的更全面理解，本发明的其它目的及结果将更加明白及易于理解。在附图中：
图1为根据本发明实施例的线性振动马达的分解图；
图2为沿图1的A面的剖面图；
图3为沿图1的B面的剖面图；
图4-1为根据本发明实施例的下壳结构示意图；
图4-2为根据本发明另一实施例的下壳结构示意图。
其中的附图标记包括：上壳1、缺口11、质量块2、永磁铁3、定子线圈4、柔性电路板5、焊盘51、下壳6、弹性支撑件7、结合部71、连接臂72、固定部73。
在所有附图中相同的标号指示相似或相应的特征或功能。
在下面的描述中，出于说明的目的，为了提供对一个或多个实施例的全面理解，阐述了许多具体细节。然而，很明显，也可以在没有这些具体细节的情况下实现这些实施例。在其它例子中，为了便于描述一个或多个实施例，公知的结构和设备以方框图的形式示出。
在下述具体实施方式的描述中所用到的“质量块”也可以称作“配重块”，均指与产生振动的振动块固定以加强振动平衡的高质量、高密度金属块。另外，发明主要用于微型振动马达的改进，但是也不排除将发明中的技术应用于大型振动马达。但是为了表述的方便，在以下的实施例描述中，“线性振动马达”和“微型振动马达”表示的含义相同。
为详细描述本发明实施例的线性振动马达结构，以下将结合附图对本发
明的具体实施例进行详细描述。
图1示出了根据本发明实施例的线性振动马达的分解结构；图2和图3分别从不同角度示出了根据本发明实施例的线性振动马达的剖面结构。
如图1至图3共同所示，本发明实施例的线性振动马达，包括长方体结构的上壳1、与上壳1适配连接的板状结构的下壳6、收容在上壳1和下壳6之间的振动***；其中，上壳1为侧开口结构，下壳6结合在上壳1的开口处，上壳1和下壳6共同形成收容振动***的空间；在下壳6的一侧设置有两个对称分布的弹性支撑件7，振动***悬设在两弹性支撑件7之间，并在弹性支撑件7提供的谐振和恢复力的作用下往复运动，实现线性振动马达的振动；并且，下壳6所在平面与线性振动马达的振动方向相平行。
在本发明中，上壳和下壳并不是表示上壳一定位于下壳的上方，下壳实质上是侧壳。
其中，两个弹性支撑件7与下壳6为一体结构，二者采用一体加工成型。弹性支撑件7进一步包括与下壳6相结合的结合部、与振动***固定连接的固定部以及位于结合部和固定部之间的连接臂(弹性连接臂)，连接臂与下壳6相结合的位置即为结合部所在位置，两个结合部分别位于下壳6的两端；优选地，连接臂与下壳相结合的位置可以分别设置在下壳的两个对角处，从而使两个弹性支撑件7关于下壳6的中心点呈中心对称分布，以防止振动***发生偏振。
在本发明的一个具体实施方式中，两个弹性支撑件7的固定部是相互平行的，并且均与下壳6相垂直；另外，为防止振动***在振动过程中与下壳6发生碰撞，结合部设置为从下壳6所在平面延伸出并与下壳6相垂直的平面结构，结合部的长度可根据振动***的尺寸进行设置，通过结合部的长度调节连接臂与下壳6之间的距离，从而确保振动***远离下壳6并悬设在下壳6的一侧。
具体地，两个弹性支撑件7可均设置为“一”字型结构，两个固定部分别与质量块2的上下两个端面固定连接，质量块2的上下两个端面是指与质量块2的振动方向相垂直的Z轴方向的上下两个侧面。或者，两个弹性支撑件可均设置为“L”型结构，固定部与连接臂之间存在弯折，即固定部与结合部所在平面相互垂直，固定部分别与质量块沿长轴方向的两端固定连接。其
中，质量块的长轴方向为同一水平面内，质量块沿X轴或者Y轴方向上尺寸最大的轴向，一般为质量块的X轴方向，或者长度方向；对应的，质量块的短轴方向为同一水平面内，质量块沿X轴或者Y轴方向上尺寸最小的轴向，一般为质量块的Y轴方向，或者宽度方向，具体可参考附图所示质量块的结构。
具体地，图4-1示出了根据本发明实施例的下壳结构。
如图4-1所示，在该实施例中，下壳6为长方向板状结构，在下壳6的左上角和右下角分别连接有对称分布的弹性支撑件，弹性支撑件与下壳6为一体结构，二者一体加工成型；弹性支撑件包括与下壳相结合的结合部71、与振动***连接的固定部73(自由端)、以及位于结合部71和固定部73之间的连接臂72，连接臂为一个支臂或者对称分布的两个支臂等。其中，结合部71与固定部73所在平面相互平行，并且二者均与下壳所在平面相互垂直，固定部73分别与质量块的上下两个端面固定连接。
图4-2示出了根据本发明另一实施例的下壳结构。
如图4-2所示，在该实施例中，下壳6为长方向板状结构，在下壳6的左上角和右下角分别连接有对称分布的弹性支撑件，弹性支撑件与下壳6为一体结构，二者一体加工成型；弹性支撑件包括与下壳相结合的结合部71、与振动***连接的固定部73、以及位于结合部71和固定部73之间的连接臂72，连接臂为一个支臂或者对称分布的两个支臂等。其中，结合部71与固定部73所在平面相互垂直，并且二者均与下壳6所在平面相互垂直，固定部73分别与质量块沿长轴方向的两端固定连接。
在本发明实施例的另一具体实施方式中，如图1至图3共同所示，还包括收容在上壳1和下壳6之间的定子***，定子***包括柔性电路板5和固定在柔性电路板5上并与柔性电路板5导通的定子线圈4，定子线圈4的轴线方向与振动***的振动方向相垂直。其中，定子线圈4的轴线方向是指定子线圈4所形成的柱状体的中轴线方向，其垂直于质量块的振动方向。
其中，柔性电路板5的部分结构位于线性振动马达的壳体(包括上壳1和下壳6)内，用于与定子线圈4导通，另一部分结构从壳体内引出，用于与外部电路导通。换言之，在柔性电路板5上设置有延伸出的焊盘51，而焊盘51与柔性电路板5之间的角度可调；焊盘51可以悬设在外壳外部或者与外壳
的侧壁贴合固定，例如，焊盘可以通过SMT(Surface Mount Technology，表面贴装技术)与壳体的外侧壁固定连接，使得产品使用更加灵活方便。
对应地，在上壳1对应焊盘51的位置设置有缺口11，缺口11的宽度和厚度均不小于焊盘51的宽度和厚度，焊盘51从缺口11内引出，并与外部电路或者终端设备的电路导通，从而实现线性振动马达内外部电路的连接。
为优化产品的磁场，缩短振动响应的时间，在本发明的线性振动马达中，定子线圈4所位于的壳体为导磁件，即定子线圈4通过柔性电路板5所固定的上壳1采用导磁材质制成，上壳1为导磁件不仅能够聚拢穿过定子线圈4的磁力线，还能够增强产品磁场，提高响应速度，增加产品的振感，改善用户体验。
此外，振动***包括质量块2和嵌设在质量块2内部的永磁铁3；并且，永磁铁3在与质量块2的振动方向相垂直的平面内呈非对称分布。如图1所示，在质量块2与线性振动马达的振动方向相平行的一侧设置有限位槽，永磁铁3固定在限位槽内；定子线圈4固定在与永磁铁3位置对应的壳体的侧壁上，非对称结构的永磁铁能够减少其对质量块空间的占用，增大振动***的质量，降低线性振动马达的共振频率，提高产品振感。
为聚拢磁力线，提高磁场利用率，还可以在永磁铁的两端添加华司，通过华司聚集磁力线，改善产品性能。例如，在永磁铁沿振动方向的相平行的上下两个侧面上分别设置有华司，华司的尺寸与永磁铁的横截面尺寸相一致，通过华司聚拢穿过定子线圈的磁力线，从而使产品获得更大的磁通量和更强的振感效果。
为加强线性振动马达的振感及质量块的振动平衡，本发明各实施例中的质量块2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，加大质量块振动力，使电子产品的振动更加强烈。
通过上述实施方式可看出，本发明提供的线性振动马达，具有以下优点：
1、将两个弹性支撑件设置在位于侧面的下壳上，振动***固定在弹性支撑件之间，从而可以更好的固定振动***，增加磁路驱动力，质量块不容易与壳体发生碰撞，产品稳定性好；
2、上壳为长方体结构，使得空间利用率高，弹性支撑件对称分布，使得不容易出现偏振，并且弹性支撑件与线性振动马达的壳体设置为一体结构，
能够节省物料，降低生产成本，提升产品的装配效率及生产效率；
3、永磁铁固定在质量块的限位槽内，在振动方向上没有重叠部分，有利于减小其对质量块的侵占，增大振动***的质量和振感；4、壳体采用导磁材质，优化磁场，缩短产品响应时间，增加线性振动马达的振感，改善用户体验；
5、焊盘可以悬设在外壳外部或者与外壳的侧壁贴合固定，例如，焊盘可以通过SMT与壳体的外侧壁固定连接，使得产品使用更加灵活方便。
如上参照附图以示例的方式描述根据本发明的线性振动马达。但是，本领域技术人员应当理解，对于上述本发明所提出的线性振动马达，还可以在不脱离本发明内容的基础上做出各种改进。因此，本发明的保护范围应当由所附的权利要求书的内容确定。
Claims (10)
- 一种线性振动马达，包括上壳、与所述上壳适配连接的下壳、收容在所述上壳和所述下壳之间的振动***：其特征在于，所述上壳包括侧开口，所述下壳结合在所述上壳的侧开口处；在所述下壳的面对所述上壳的侧面上设置有两个弹性支撑件，所述振动***固定在所述弹性支撑件之间。
- 如权利要求1所述的线性振动马达，其特征在于，所述上壳为长方体结构，所述弹性支撑件对称分布，并且所述弹性支撑件与所述下壳为一体成型结构。
- 如权利要求1所述的线性振动马达，其特征在于，所述弹性支撑件的每个包括与所述振动***固定连接的固定部、与下壳相结合的结合部、以及用于连接所述固定部和所述结合部的连接臂；所述结合部分别位于所述下壳的两端。
- 如权利要求3所述的线性振动马达，其特征在于，所述结合部分别位于所述下壳的两个对角处；并且，所述弹性支撑件关于所述下壳的中心呈中心对称分布。
- 如权利要求3所述的线性振动马达，其特征在于，所述弹性支撑件的固定部相互平行，且均与所述下壳相垂直。
- 如权利要求3所述的线性振动马达，其特征在于，所述弹性支撑件为“一”字型结构，所述固定部分别与所述质量块的上下两个端面固定连接；或者，所述弹性支撑件为“L”型结构，所述固定部与所述连接臂之间存在弯折，所述固定部分别与所述质量块沿长轴方向的两端固定连接。
- 如权利要求1所述的线性振动马达，其特征在于，所述振动***包括质量块和嵌设在所述质量块内部的永磁铁；并且，所述永磁铁在与所述质量块的振动方向相垂直的平面内呈非对称分布。
- 如权利要求1所述的线性振动马达，其特征在于，还包括定子***；所述定子***包括柔性电路板和固定在所述柔性电路板上并与所述柔性电路板导通的定子线圈；所述定子线圈的轴线方向与所述振动***的振动方向相垂直。
- 如权利要求8所述的线性振动马达，其特征在于，在所述柔性电路板上设置有延伸出的焊盘，所述焊盘与所述柔性电路板之间的角度可调；在所述上壳对应所述焊盘的位置设置有缺口，所述焊盘从所述缺口内引出，并与外部电路导通，所述焊盘与所述上壳通过表面贴装技术装配固定。
- 如权利要求1所述的线性振动马达，其特征在于，所述上壳为导磁件。
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