WO2019029055A1 - 线性振动马达 - Google Patents

线性振动马达 Download PDF

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Publication number
WO2019029055A1
WO2019029055A1 PCT/CN2017/112173 CN2017112173W WO2019029055A1 WO 2019029055 A1 WO2019029055 A1 WO 2019029055A1 CN 2017112173 W CN2017112173 W CN 2017112173W WO 2019029055 A1 WO2019029055 A1 WO 2019029055A1
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WO
WIPO (PCT)
Prior art keywords
housing
vibrator assembly
coil
vibration motor
linear vibration
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PCT/CN2017/112173
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English (en)
French (fr)
Inventor
毛东升
张新众
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歌尔股份有限公司
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Publication of WO2019029055A1 publication Critical patent/WO2019029055A1/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
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/02—Casings or enclosures characterised by the material thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes

Definitions

  • the invention relates to the field of electronic product technology. More specifically, it relates to a linear vibration motor.
  • a miniature linear vibration motor is usually used for feedback of the system, such as clicking the vibration feedback of the touch screen.
  • a linear vibration motor is a component that converts electrical energy into mechanical vibration using the principle of electromagnetic force.
  • a conventional linear vibration motor is usually installed in a mobile communication terminal, a portable terminal or the like, which is usually installed at an edge portion of the device, and receives vibrations. The object produces vibration in a vertical direction.
  • Existing linear vibration motors typically include a housing having a receiving chamber in which is disposed a stator assembly, a vibrator assembly, and an elastomeric support configured to suspend the vibrator assembly within the receiving chamber.
  • the stator assembly may be a central core or coil fixedly coupled to the housing, and the corresponding vibrating assembly may be a coil that supports upper and lower vibrations or a central core supported by the elastic support.
  • the central core of the existing stator assembly or the vibrator assembly is a cylindrical solid core structure, and the coil surrounds the periphery of the central core. After the coil is energized, the coil is subjected to an ampere force to generate electromagnetic force, and the central core The interaction between the generated magnetic fields causes the vibrator assembly to move up and down, which in turn results in vibration of the entire linear vibration motor.
  • the object of the present invention is to provide a vibration chamber which can maintain the vibration uniformity and can improve the vibration space of the vibrator assembly without increasing the volume of the linear vibration motor, and improve the utilization efficiency of the magnetic flux line of the central core of the coil, and improve the electromagnetic force of the motor. Drive the force to improve the tactile experience of the motor.
  • a linear vibration motor characterized in that the linear motor comprises:
  • stator assembly including a housing having a receiving cavity, and a magnet positioned within the receiving cavity and fixed in combination with the housing, the magnet including a hollow portion extending along a vibration direction of the vibrator assembly ;
  • the vibrator assembly includes a magnetic conductive plate and a coil fixed to a surface of the magnetic conductive plate, and a mass.
  • the coil vibrates with the vibrator assembly and is inserted into a hollow portion of the magnet;
  • An elastic support member configured to suspend the vibrator assembly in a receiving cavity of the housing
  • a flexible printed circuit board comprising a fixing portion fixed to a lower surface of the magnetic conductive plate and electrically connected to the coil.
  • a recessed portion corresponding to the fixing portion of the flexible printed circuit board is formed on the casing.
  • the flexible circuit board further includes:
  • connection portion located outside the receiving cavity and fixed to an upper surface of the housing below the vibrator assembly
  • the fixing portion and the connecting portion are connected as a flexible connecting portion of a unitary structure.
  • the housing comprises:
  • a recessed portion concentrically disposed with a vertical projection area of the fixing portion on the housing is formed on the second housing, and the projection area is inside the recessed portion.
  • the vibrator assembly further includes a central core secured coaxially within the coil, the central core including at least a body portion that is inserted into the center of the coil.
  • the central magnetic core further comprises:
  • a vibration space for vibrating the vibrator assembly is provided between the top upper surface of the center core and the inner side surface of the top wall of the casing.
  • the linear vibration motor of the invention is convenient to assemble, and can maintain the uniform vibration uniformity, and can also keep the flexible circuit board from contacting with other structural components in the linear vibration motor during the vibration process, and prolong the service life of the linear vibration motor.
  • Increasing the volume of the linear vibration motor improves the vibration space of the vibrator assembly; in addition, by improving the center core structure and its arrangement with the coil, the magnetic properties of the center core can be maximized, and the magnetic flux of the center core of the coil can be improved.
  • the efficiency improves the electromagnetic driving force of the motor, and the increase of the driving force increases the effective bandwidth of the motor, facilitates the application of the dual-frequency or multi-frequency resonant frequency, satisfies the requirements of the vibration provided by the motor under the multi-frequency point, and improves the requirements.
  • the tactile experience of the motor improves the electromagnetic driving force of the motor.
  • Figure 1 is a block diagram showing the construction of a linear vibration motor according to a preferred embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing the structure of a linear vibration motor provided in a preferred embodiment of the present invention.
  • FIG 3 is a schematic view showing the arrangement of a vibrator assembly and a center core in a linear vibration motor according to a preferred embodiment of the present invention.
  • weights both of which refer to one of the components that cooperate with the magnet or coil to vibrate within the motor housing as a vibrator assembly.
  • linear vibration motor to which the present invention relates in the description may also be referred to as a Y-direction vibration motor.
  • a linear vibration motor will be specifically described as an example.
  • the invention provides a linear vibration motor with a novel structure, which improves the structure of the magnet and the arrangement of the coil, and solves the problem of improving the vibrator assembly in the motor without increasing the volume of the vibration motor.
  • the problem of the vibration space ensures that the vibrator assembly does not come into contact with the housing of the motor during the vibration of the motor housing cavity, thereby avoiding unnecessary wear of the original components in the vibrator assembly and prolonging the service life of the motor.
  • it also solves the problem that the current magnetic line utilization efficiency of the magnet is low, the motor assembly process is complicated, and the existing linear vibration motor is only suitable for the vibration experience under the single frequency point, and does not satisfy the problem of the haptic feedback application requirement for the multi-frequency point vibration.
  • FIG. 1 shows a structural assembly view of a linear vibration motor provided by a preferred embodiment of the present invention.
  • 2 is a cross-sectional view showing the structure of a linear vibration motor provided by a preferred embodiment of the present invention.
  • 3 is a schematic view showing the arrangement of a vibrator assembly and a center core in a linear vibration motor according to a preferred embodiment of the present invention.
  • the linear vibration motor provided by the present embodiment includes a stator assembly including a housing 1 having a receiving cavity, and a magnet 2 located in the receiving cavity and fixed in combination with the housing 1, the magnet 2
  • the hollow portion 21 is extended along the vibration direction of the vibrator assembly.
  • the magnet 2 in the present invention may be a segmented or continuous annular structure, which is not limited in the present invention.
  • the housing 1 includes a first housing 11 having an opening at the bottom, and a second housing 12, the first housing 11 and the second housing 12 being fixedly coupled by the first portion 121.
  • the housing 1 housing the chamber.
  • the first housing 11 and the second housing 12 are required to be described.
  • both the first housing 11 and the second housing 12 are made of a material having magnetic permeability, so that it is convenient to close the magnetic lines of the central core.
  • the magnetic action of the magnet 2 is maximized to enhance the electromagnetic driving force of the motor.
  • the housing 1 has a circular structure. It is obvious that the housing 1 may also have a non-circular cross-section, and may be, for example, a rectangular parallelepiped shape, a rounded rectangular parallelepiped shape or the like.
  • the vibrator assembly includes a coil 3 disposed coaxially with the magnet 2 and a mass 4 disposed coaxially with the coil 3 around the periphery of the coil 3; when the vibrator assembly vibrates, The coil 3 vibrates with the vibrator assembly and is inserted into the hollow portion 21 of the magnet 2.
  • An elastic support member 5 is configured to suspend the vibrator assembly within the receiving cavity of the housing 1.
  • the magnetic conductive plate 6, the coil 3 and the mass 4 are fixedly coupled to the upper surface of the magnetic conductive plate 6, and a gap 7 for inserting the magnet 2 is formed between the coil 3 and the mass 4.
  • the elastic support member 5 is coupled and fixed between the lower surface of the magnetic conductive plate 6 and the inner side surface of the second housing 12, and is configured to suspend the vibrator assembly in the housing cavity of the housing 1.
  • the flexible printed circuit board 8 includes a fixing portion 81 fixedly coupled to the lower surface of the magnetic conductive plate 6 and electrically connected to the coil 3; and is located outside the casing 1 and in the second casing 12
  • the upper surface of the second portion 123 not surrounded by the receiving cavity is fixedly used for a connecting portion 82 electrically connected to the external device; and a flexible connecting portion 83 that connects the fixing portion 81 and the connecting portion 82 to an integral structure.
  • the flexible connecting portion 83 is located below the elastic arm of the elastic support member 6.
  • the flexible connecting portion 83 moves up and down, thereby avoiding the flexible connecting portion 83 and the elastic portion. Collisions between the arms affect the vibration performance of the vibration motor.
  • the limit of the damping member provided on the upper surface of the second casing can be prevented to prevent the elastic arm from being pressed to the flexible connecting member to damage the flexible connecting member.
  • the fixing portion 81 is inside the elastic support. It will be understood by those skilled in the art that the mass and/or the magnetic conductive plate in the motor should be provided with wire vias connecting the coil and the printed circuit board to enable the coil to be electrically connected to the external device, but for the via hole. The specific position and structural form of the present invention are not limited herein.
  • the magnet 2 having an annular structure fixed in combination with the inner surface of the top wall of the first casing 11 serves as a stator assembly, and the coil 3 is inserted into the hollow portion 21 of the center core 2 as a part of the vibrator assembly with the vibrator assembly.
  • the magnet 2 having a ring structure as a stator and its arrangement with the coil 3 as a vibrator are compared with the columnar solid core magnet used in the conventional vibration motor due to the existing columnar solid core magnet.
  • the magnetic lines of force are radiated outwardly from the central axis, and the magnetic lines of the ring-shaped structural magnet of the present invention are concentrated on the central axis, so that the magnetic field strength at the coil position on the central axis of the magnet of the annular structure is higher than that of the sleeve.
  • the coil is disposed at the outer periphery of the columnar solid core magnet; and the coil of the present invention is disposed in the inner space of the magnet having the annular structure, and the diameter of the coil can be made smaller, so the effective number of coils is significantly higher than that of the cylindrical solid core magnet.
  • the effective number of turns of the outer large diameter coil, and the linear vibration motor provided by the invention can maximize the magnetic properties of the magnet and increase the magnetic force in the magnet
  • the utilization efficiency improves the electromagnetic driving force of the motor, and the increase of the driving force increases the effective bandwidth of the motor, facilitates the application of the dual-frequency or multi-frequency resonant frequency, and satisfies the vibration of the motor under the multi-frequency point.
  • the requirement is to improve the tactile experience of the motor and improve the overall performance of the linear vibration motor as a whole.
  • the fixing portion in the flexible printed circuit board in the vibrator assembly may collide with the second housing, affecting the vibration of the motor.
  • the uniformity also causes a certain loss to the fixed part.
  • the original element and the housing in the vibrator assembly are avoided.
  • a recess 122 is formed on the second housing concentrically with a vertical projection area of the fixing portion 81 of the flexible printed circuit board on the housing, and the projection area is The inside of the recess.
  • the fixing portion inside the elastic supporting member ensures a larger vibration stroke of the vibrator assembly due to the presence of the recessed portion, and satisfies the fixing portion in the flexible printed circuit board in the case where the current is appropriately increased. There is no contact with the second housing.
  • the vibrator assembly further includes a magnet 9 fixed coaxially to the coil 3, the magnet 9 including a body portion 91 inserted in the coil 3 and fixedly coupled to an upper surface of the magnetic conductive plate 6; Between the top upper surface of the top surface 9 and the inner side surface of the top wall of the first casing 11, there is a vibration space for the vibrator assembly to vibrate.
  • the magnet 9 can be selected from a magnetic material with strong magnetic permeability, and has high magnetic permeability, is convenient for guiding the magnetic lines of force, and is concentrated to the coil, and in the energized coil, a large magnetic induction intensity can be generated, which is advantageous for reducing the volume of the coil.
  • a vibration space for vibrating the vibrator assembly is provided between the top upper surface of the magnet 9 and the top upper surface of the mass 4 and the inner surface of the top wall of the first casing 11.
  • a gap for easy fitting is left between the outer side wall surface of the body portion 91 and the inner side wall surface of the coil 3, and an assembly gap is left between the straight portion 92 and the coil 3 which are perpendicular to the body portion 91 and located above the coil.
  • the linear vibration motor provided by the invention can ensure the uniform vibration of the linear vibration motor on the one hand and improve the vibration space of the vibrator assembly without increasing the volume of the linear vibration motor, so as to match a larger supply current;
  • the magnetic property of the magnet can be maximized, the utilization efficiency of the magnetic line of the coil magnet can be improved, and the electromagnetic driving force of the motor can be improved, and in the present invention, the coil is disposed in the inner space of the magnet having the annular structure, and the diameter of the coil can be made smaller, and the coil is effective.
  • the number of turns is significantly higher than the effective number of turns of the large-diameter coil around the existing cylindrical solid magnet; furthermore, the linear vibration motor provided by the present invention increases the effective bandwidth of the motor by increasing the electromagnetic driving force of the motor, and is convenient.

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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

一种线性振动马达，包括：定子组件，所述定子组件包括具有容纳腔的壳体（1），以及位于所述容纳腔内且与所述壳体（1）结合固定的磁体（2），所述磁体（2）包括中空部，所述中空部沿振子组件振动方向延伸；振子组件，所述振子组件包括导磁板（6）和固定在所述导磁板（6）上表面的线圈（3）以及质量块（4），所述振子组件振动时，所述线圈（3）随振子组件振动并插入所述磁体（2）的中空部；弹性支撑件（5），配置为将所述振子组件悬置在所述壳体（1）的容纳腔内；柔性印刷电路板（8），所述柔性印刷电路板（8）包括固定在所述导磁板（6）的下表面且与所述线圈（3）电性连接的固定部（81）。上述线性振动马达装配方便，能够延长振动马达的使用寿命，在不增加线性振动马达体积的基础上提升了振子组件的振动空间，且能够提升中心磁芯磁力线的利用效率。

Description

线性振动马达 技术领域
本发明涉及电子产品技术领域。更具体地，涉及一种线性振动马达。
背景技术
随着通信技术的发展，便携式电子设备，例如手机、平板电脑、智能穿戴设备、多媒体娱乐设备等已经成为人们的生活必须品。在这些电子设备中，通常使用微型的线性振动马达来做系统的反馈，例如点击触摸屏的振动反馈等。
线性振动马达是一种利用电磁力原理将电能转化为机械振动的部件，常规的线性振动马达通常安装在移动通信终端、便携式终端等内，其通常安装在设备的边缘部分，并且在与接收振动的对象相垂直的方向上产生振动。
现有线性振动马达通常包括具有容纳腔的壳体，容纳腔内设置有定子组件、振子组件以及配置为将振子组件悬置在容纳腔内的弹性支撑件。定子组件可为与壳体固定连接的中心磁芯或者线圈，与之对应的振动组件可为通过弹性支撑件支撑进行上、下振动的线圈或者中心磁芯。其中现有的作为定子组件或者振子组件的中心磁芯均为柱状实芯结构，线圈围绕在中心磁芯外围，在线圈通电后，线圈便会受到安培力作用产生电磁力，并与中心磁芯所产生的磁场之间相互作用，进而使得振子组件向上和向下运动，进而会获得整个线性振动马达发生振动的效果。
然而对于现有的线性振动马达，在实际工作的过程中，一方面会出现振子在上下振动的最大行程时，振子中的一部分会和上壳体或者下壳体发生碰撞，这种碰撞会对原有规律性的振动造成影响，使得振动不均匀，振动的效果不被大多数的使用者所接受；另一方面，当振子处于上下振动的最大行程时如果振子中的柔性电路板和上壳体或者下壳体发生碰撞，那么随着碰撞次数的不断积累，会出现柔性电路板完全或者部分断裂，从而导致线圈当中的电流中断或者减少，那么在线性振动马达内部磁场强度固定的情况下，线圈所受到的安培力中断或者减少，缩短了线性振动马达的使用寿命；从振动的效果来看要么振子根本无法起振，要么即使振子能够振动，但振子振动所产生的振动效果无法起到提醒使用者的目的。再一方面，中心磁芯的磁力线利用效率低下，影响整体触觉感受。
发明内容
本发明的目的是在于提出一种能够保持振感均匀，同时能够在不增加线性振动马达体积的基础上提升振子组件的振动空间，并且提升线圈中心磁芯磁力线的利用效率，提升了马达的电磁驱动力，从而提高马达的触觉体验。
为实现上述发明目的，本发明采用下述技术方案：
一种线性振动马达，其特征在于，所述线性马达包括：
定子组件，所述定子组件包括具有容纳腔的壳体，以及位于所述容纳腔内且与所述壳体结合固定的磁体，所述磁体包括中空部，所述中空部沿振子组件振动方向延伸；
振子组件，所述振子组件包括导磁板和固定在所述导磁板上表面的线圈以及质量块，所述振子组件振动时，所述线圈随振子组件振动并插入所述磁体的中空部；
弹性支撑件，配置为将所述振子组件悬置在所述壳体的容纳腔内；
柔性印刷电路板，所述柔性印刷电路板包括固定在所述导磁板的下表面且与所述线圈电性连接的固定部。
此外，优选地方案是，在所述壳体上形成有与所述柔性印刷电路板的固定部相对应的凹陷部。
此外，优选地方案是，所述柔性电路板还包括：
位于所述容纳腔外且与所述振子组件下方的壳体上表面固定的连接部；以及
将所述固定部以及连接部连接成整体结构的柔性连接部。
此外，优选地方案是，所述壳体包括：
和所述磁体固定连接的第一壳体；以及
和所述弹性支撑件固定连接的第二壳体；
在所述第二壳体上形成有与所述固定部在该壳体上的垂直投影区域同心设置的凹陷部，且该投影区域在所述凹陷部内部。
此外，优选地方案是，所述振子组件还包括以同轴方式固定到所述线圈内的中心磁芯，所述中心磁芯至少包括插入在所述线圈中央内的本体部。
此外，优选地方案是，所述中心磁芯还包括：
垂直于所述本体部且位于所述线圈上方的平直部。
此外，优选地方案是，所述中心磁芯的顶部上表面与壳体顶壁的内侧表面之间具有供振子组件振动的振动空间。
本发明的有益效果如下：
本发明所述线性振动马达装配方便，同时能够保持振感均匀，也能够保持柔性电路板在振动的过程中不和线性振动马达中其他结构件发生接触，延长线性振动马达的使用寿命，在不增加线性振动马达体积的基础上提升了振子组件的振动空间；此外，通过改进中心磁芯结构及其与线圈的配置方式，可最大化利用中心磁芯的磁性，提升线圈中心磁芯磁力线的利用效率，提升了马达的电磁驱动力，驱动力的增大使得马达有效频宽增大，便于双频或多频谐振频率的应用，满足多频点下对马达所提供振感的要求，提高了马达的触觉体验。
附图说明
下面结合附图对本发明的具体实施方式作进一步详细的说明。
图1示出本发明一种优选地实施方式所提供线性振动马达的结构装配图。
图2示出本发明一种优选地实施方式所提供线性振动马达的结构剖视图。
图3示出本发明一种优选地实施方式所提供线性振动马达中振子组件与中心磁芯的配置示意图。
具体实施方式
在下述的描述中，出于说明的目的，为了提供对一个或者多个实施方式的全面理解，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方式。在其它例子中，为了便于描述一个或者多个实施方式，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”，均指与磁体或者线圈配合在马达壳体内作为振子组件发生振动的组件之一。另外，本发明在描述中涉及到的线性振动马达，也可以称作Y向振动马达。但是为了表述的方便，在以下的实施方式描述中，具体以线性振动马达为例进行说明。
为了更清楚地说明本发明，下面结合优选实施方式和附图对本发明做进一步的说明。但需要说明的是，为了便于理解，本发明中涉及的如“上表面”，“下表面”，“底部”，“顶部”等描述，仅是参照附图所提供样式的说明，其并非用于限制，本领域一般技术人员可以理解的是，当本发明中马达摆放位置发生变化时，文中所涉及的相应的描述及用词应当以其在马达中所起的 实际作用为准。
本发明提供了一种新型结构的线性振动马达，该振动马达对磁体结构及其与线圈的配置方式进行了改进，一方面解决了在不增加振动马达体积的基础上，提升马达中的振子组件振动空间的问题，同时保证了振子组件在马达容纳腔中振动的过程中不和马达的壳体发生接触，避免了振子组件中的原件不必要的磨损，延长马达的使用寿命。另一方面也解决了目前磁体的磁力线利用效率低下，马达装配过程复杂，且现有线性振动马达只适用于单频点下振动体验，不满足对于多频点振动的触觉反馈应用要求的问题。
结合图1至图3所示，图1示出本发明一种优选地实施方式所提供的线性振动马达的结构装配图。图2示出本发明一种优选地实施方式所提供的线性振动马达的结构剖视图。图3示出本发明一种优选地实施方式所提供的线性振动马达中振子组件与中心磁芯的配置示意图。
本实施方式所提供的线性振动马达包括：定子组件，所述定子组件包括具有容纳腔的壳体1，位于所述容纳腔内且与所述壳体1结合固定的磁体2，所述磁体2包括中空部21，所述中空部21沿振子组件振动方向延伸；本发明中所述磁体2可为分段的或者连续的环状结构，本发明对此并不加以限制。
如图1所示，所述壳体1包括底部具有开口的第一壳体11，以及第二壳体12，所述第一壳体11和第二壳体12通过第一部分121结合固定形成具有容纳腔的壳体1。第一壳体11与第二壳体12构成需要说明的是，本发明中第一壳体11与第二壳体12均由具有导磁性的材料制成，这样便于闭合中心磁芯的磁力线，使磁体2的磁性作用最大化发挥，以提升马达的电磁驱动力。另外作为本发明一种优选的实施方式，所述壳体1呈圆型结构，显然所述壳体1也可呈非圆形截面的结构，例如可以是长方体型、圆角长方体型等。
具体的，结合图2所示，振子组件包括与磁体2同轴设置的线圈3及围绕在所述线圈3外围的与线圈3同轴设置的质量块4；当所述振子组件振动时，所述线圈3随振子组件振动并插入所述磁体2的中空部21。弹性支撑件5，配置为将所述振子组件悬置在所述壳体1的容纳腔内。导磁板6，所述线圈3及质量块4结合固定在所述导磁板6的上表面上，且线圈3与质量块4之间形成有供磁体2插入的间隙7。弹性支撑件5结合固定在所述导磁板6的下表面与第二壳体12的内侧表面之间，且配置为将所述振子组件悬置在所述壳体1的容纳腔内。柔性印刷电路板8，包括结合固定在所述导磁板6的下表面且与线圈3电性连接的固定部81；及位于所述壳体1外，且与所述第二壳体12中不被容纳腔所包围的第二部分123的上表面结合固定的用于 与外部设备电性连接的连接部82；及将所述固定部81与所述连接部82连接成整体结构的柔性连接部83。其中所述柔性连接部83位于弹性支撑件6弹性臂的下方，当振子组件振动时，弹性臂受压或者受拉变形时，柔性连接部83随之上下运动，避免了柔性连接部83与弹性臂之间发生碰撞，影响振动马达振动性能的问题。且当弹性臂受压变形到极限位置时，可通过第二壳体上表面所设阻尼件的限位，以防止弹性臂挤压到柔性连接件，使柔性连接件损坏。所述固定部81处于所述弹性支撑件的内部。本领域技术人员可以理解的是，马达中质量块和/或导磁板上应当设有连接线圈和印刷电路板的导线过孔，以实现线圈能够与外部设备电性连接，但对于过孔的具体位置及结构形态，本发明在此不作限制。
具体的，与第一壳体11的顶壁内侧表面结合固定的呈环状结构的磁体2作为定子组件，线圈3作为振子组件的一部分随振子组件振动插入所述中心磁芯2的中空部21，该种作为定子的呈环状结构的磁体2及其与作为振子的线圈3的配置方式，与现有的振动马达中所使用的柱状实芯结构磁体相比，由于现有柱状实芯磁体的磁力线是从中轴线向外辐射分散的，而本发明的呈环形结构磁体的磁力线是向中轴线上聚集的，因此设置在呈环形结构磁体中轴线上的线圈位置所处的磁场强度高于套设在柱状实芯磁体外围的线圈处；并且本发明中线圈设置于呈环形结构磁体的内部空间，其直径尺寸可以做的比较小，故线圈有效圈数会显著高于设置于柱状实芯磁体外围的大直径线圈的有效圈数，进而本发明所提供的线性振动马达，可最大化利用磁体的磁性，提升磁体中的磁力线的利用效率，提升了马达的电磁驱动力，且驱动力的增大使得马达有效频宽增大，便于双频或多频谐振频率的应用，并满足多频点下对马达所提供振感的要求，提高了马达的触觉体验，并从整体上提高了线性振动马达综合性能。
此外，在本实施方式中，所述线性振动马达振子组件在容纳腔内振动的过程中，振子组件中的柔性印刷电路板中的固定部有可能会和第二壳体发生碰撞，影响马达振动的均匀性，同时也会对固定部造成一定的损耗。为了实现在不增加马达体积的前提下，尽可能提高振子振动空间，同时避免振子组件中的原件和壳体碰撞目的。结合图1所示，本实施方式特将所述第二壳体上形成有与柔性印刷电路板的固定部81在该壳体上的垂直投影区域同心设置的凹陷部122，且该投影区域在所述凹陷部内部。在振子组件振动的过程中，处于弹性支撑件内部的固定部由于凹陷部的存在，保证了振子组件的更大的振动行程，满足在电流适当增加的情况下柔性印刷电路板中的固定部也 不会和第二壳体发生碰橦。
结合图2及图3，为了进一步增加呈环状结构的磁体2的磁力线向中轴线聚集的效果，以增加线圈3所处位置的磁场强度，增大马达的电磁驱动力，优选地，所述振子组件还包括以同轴方式固定到所述线圈3内的磁体9，所述磁体9包括插入在所述线圈3内且结合固定在导磁板6的上表面的本体部91；所述磁体9的顶部上表面与第一壳体11顶壁的内侧表面之间具有供振子组件振动的振动空间。所述磁体9可选用导磁能力强的磁性材料，导磁率高，便于为磁力线进行导向，向线圈处集中，且在通电线圈中，可以产生较大的磁感应强度，利于减小线圈的体积。
此外，在本实施方式中，所述磁体9的顶部上表面及质量块4的顶部上表面与所述第一壳体11顶壁的内侧表面之间具有供振子组件振动的振动空间。另外，本体部91外侧壁表面与线圈3内侧壁表面之间留有便于装配的缝隙，与所述本体部91相垂直并且位于线圈上方的平直部92和线圈3之间留有装配的缝隙。应该说该种结构配置方式的振子组件及中心磁芯的同样能够实现本发明的发明目的，其所具有的其它优势与第一实施方式及或第二实施方式所提供马达相对现有技术的优势相同，在此不再赘述。
本发明所提供的线性振动马达，一方面能够保证线性振动马达的均匀振动并且在不增加线性振动马达体积的基础上提升了振子组件的振动空间，从而可以匹配更大的供电电流；另一方面可最大化利用磁体的磁性，提升线圈磁体磁力线的利用效率，提升了马达的电磁驱动力，并且本发明中线圈设置于呈环形结构磁体的内部空间，其直径尺寸可以做的比较小，线圈有效圈数会显著高于现有柱状实芯磁体外围的大直径线圈的有效圈数；进而本发明所提供的线性振动马达，通过提升马达的电磁驱动力，增大了马达的有效频宽，便于双频或多频谐振频率的应用，并满足多频点下对马达所提供振感的要求，从整体上提高了线性振动马达综合性能。
显然，本发明的上述实施方式仅仅是为清楚地说明本发明所作的举例，而并非是对本发明的实施方式的限定，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，凡是属于本发明的技术方案所引伸出的显而易见的变化或变动仍处于本发明的保护范围之列。

Claims (7)

  1. 一种线性振动马达，其特征在于，所述线性马达包括：
    定子组件，所述定子组件包括具有容纳腔的壳体，以及位于所述容纳腔内且与所述壳体结合固定的磁体，所述磁体包括中空部，所述中空部沿振子组件振动方向延伸；
    振子组件，所述振子组件包括导磁板和固定在所述导磁板上表面的线圈以及质量块，所述振子组件振动时，所述线圈随振子组件振动并插入所述磁体的中空部；
    弹性支撑件，配置为将所述振子组件悬置在所述壳体的容纳腔内；
    柔性印刷电路板，所述柔性印刷电路板包括固定在所述导磁板的下表面且与所述线圈电性连接的固定部。
  2. 根据权利要求1所述的线性振动马达，其特征在于，在所述壳体上形成有与所述柔性印刷电路板的固定部相对应的凹陷部。
  3. 根据权利要求1所述线性振动马达，其特征在于，所述柔性电路板还包括：
    位于所述容纳腔外且与所述振子组件下方的壳体上表面固定的连接部；以及
    将所述固定部以及连接部连接成整体结构的柔性连接部。
  4. 根据权利要求1所述的线性振动马达，其特征在于，所述壳体包括：
    和所述磁体固定连接的第一壳体；以及
    和所述弹性支撑件固定连接的第二壳体；
    在所述第二壳体上形成有与所述固定部在该壳体上的垂直投影区域同心设置的凹陷部，且该投影区域在所述凹陷部内部。
  5. 根据权利要求1所述的线性振动马达，其特征在于，所述振子组件还包括以同轴方式固定到所述线圈内的中心磁芯，所述中心磁芯至少包括插入在所述线圈中央内的本体部。
  6. 根据权利要求5所述的线性振动马达，其特征在于，
    所述中心磁芯还包括：
    垂直于所述本体部且位于所述线圈上方的平直部。
  7. 根据权利要求6所述的线性振动马达，其特征在于，所述中心磁芯的顶部上表面与壳体顶壁的内侧表面之间具有供振子组件振动的振动空间。
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