WO2017211070A1 - 一种线性振动马达 - Google Patents

一种线性振动马达 Download PDF

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Publication number
WO2017211070A1
WO2017211070A1 PCT/CN2016/113024 CN2016113024W WO2017211070A1 WO 2017211070 A1 WO2017211070 A1 WO 2017211070A1 CN 2016113024 W CN2016113024 W CN 2016113024W WO 2017211070 A1 WO2017211070 A1 WO 2017211070A1
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WO
WIPO (PCT)
Prior art keywords
elastic piece
vibrating arms
shaped
mass
vibration motor
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Application number
PCT/CN2016/113024
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English (en)
French (fr)
Inventor
石华
孙洪超
Original Assignee
歌尔股份有限公司
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Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Priority to US16/307,619 priority Critical patent/US11025146B2/en
Publication of WO2017211070A1 publication Critical patent/WO2017211070A1/zh

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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
    • 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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • H02K7/065—Electromechanical oscillators; Vibrating magnetic drives

Definitions

  • the present invention relates to a linear vibration motor, and more particularly to a spring piece of a linear vibration motor.
  • the Z-axis vibration motor of the prior art comprises an upper shell and a lower shell, and the sealed space composed of the upper shell and the lower shell comprises a vibration system, an FPCB and a coil, and the vibration system is composed of a spiral elastic piece, a permanent magnet, a mass, and a spiral
  • the vibration system is composed of a spiral elastic piece, a permanent magnet, a mass, and a spiral
  • the bottom end of the large diameter of the elastic piece is fixed on the outer casing, and the mass is fixedly connected with the top end of the spiral elastic piece.
  • the permanent magnet drives the mass to reciprocate up and down along the Z axis, and the spiral elastic piece simultaneously Perform repeated stretching and compression actions.
  • the bottom end of the spiral sprocket having a larger diameter is fixed to the lower case, as disclosed in the Chinese invention patent "Vibration motor" (Application No.: 201610108737.4), the elastic support member is fixed on the lower case. .
  • the spiral shrapnel is inverted, and the larger diameter bottom end is fixed on the upper casing, as disclosed in the Chinese invention patent "A Linear Vibration Motor and Mobile Equipment” (Application No.: 201510885265.9).
  • the shrapnel is fixed on the top wall of the upper casing.
  • the tension and compression of the spiral shrapnel are only performed up and down along the Z axis.
  • the first-order vibration frequency is similar to the second-order vibration frequency, so the existing vibration system is prone to vibration. polarization.
  • the first-order vibration frequency refers to the vibration frequency along the Z-axis direction
  • the second-order vibration frequency is the vibration frequency along the X and Y-axis directions of the finger.
  • the diameter of the tip of the spiral shrapnel can be increased, so that the diameter of the ends of the spiral shrapnel tends to be close, and the closer the diameter of the two ends is to the polarization, the less obvious, but the rigidity of the spiral shrapnel will also be simultaneously Strengthening, the vibration frequency and amplitude of the vibration system are reduced, which reduces the power of the vibration motor.
  • the present invention provides a linear vibration motor to solve the problem that the Z-axis linear vibration motor of the prior art is susceptible to polarization.
  • the present invention provides a linear vibration motor including a housing, a mass, and a resilient piece, the elastic piece connecting the mass and the outer casing, and the elastic piece is disposed at least two, respectively disposed on two sides of the mass of the mass,
  • the elastic piece provides an elastic force in the Z-axis direction, and the mass moves up and down along the Z-axis direction;
  • a side of the mass is provided with a support plate, and a central portion of the support plate is provided with a notch extending through the support plate in an up and down direction;
  • the elastic piece is provided with two upper and lower vibrating arms, and the two vibrating arms are rotated 180 degrees symmetrically about the X-axis direction.
  • the middle portion of the elastic piece is fixed in the notch, and the two vibrating arms of the elastic piece are respectively located on the supporting plate.
  • the upper and lower sides are provided with two upper and lower vibrating arms, and the two vibrating arms are rotated 180 degrees symmetrically about the X-axis direction.
  • the middle portion of the elastic piece is fixed in the notch, and the two vibrating arms of the elastic piece are respectively located on the supporting plate.
  • the linear vibration motor further includes: a stopper, the stopper is engaged with the notch, and a middle portion of the elastic piece and the stopper are jointly welded and fixed in the notch.
  • the support plate is disposed at two and respectively disposed on two sides of the mass symmetry, or the support plates are disposed at four and respectively disposed on four sides of the mass; the elastic piece Corresponding to setting two or four;
  • the elastic pieces on both sides of the symmetry of the mass are rotated 180 degrees symmetrically about the Z axis.
  • the elastic piece is an S-shaped elastic piece
  • the middle portion of the S-shaped elastic piece is welded and fixed in the notch of the support plate, and the S-shaped elastic piece is provided with two vibrating arms, and the two vibrating arms are respectively located on the upper and lower sides of the supporting plate; two vibrating arms
  • the free end is provided with a welding plane, which is respectively welded and fixed to the inner side of the casing through a welding plane.
  • the length of the S-shaped shrapnel is greater than the length of the support plate.
  • the elastic piece is composed of two V-shaped vibrating arms and one connecting piece, and the V-shaped vibrating arm and the connecting piece are integrally formed; the two V-shaped vibrating arms rotate around the X-axis direction. 180 degrees symmetrical, and the openings of the two V-shaped vibrating arms are opposite;
  • the connecting piece is fixed in the notch, and two V-shaped vibrating arms are respectively located on the upper and lower sides of the supporting plate; the free ends of the two V-shaped vibrating arms are provided with a welding plane, which are respectively welded and fixed by the welding plane The inside of the case.
  • the length of the V-shaped vibrating arm is not more than 1/2 of the length of the support plate.
  • the elastic piece is an anti-Z-shaped elastic piece
  • the middle portion of the anti-Z-shaped elastic piece is welded and fixed in the notch of the support plate, and the anti-Z-shaped elastic piece is provided with two vibrating arms, and the two vibrating arms are respectively located on the upper and lower sides of the supporting plate;
  • the free end of the vibrating arm is provided with a welding plane, which is respectively welded and fixed to the inner side of the casing through a welding plane.
  • the length of the anti-Z-shaped elastic piece is not greater than the length of the support plate.
  • the shrapnel is added to the composite layer at a later stage using a single material, a composite material, or a processing.
  • the elastic pieces are distributed on both sides of the mass block and are oppositely arranged.
  • Each side of the elastic piece is provided with a vibrating arm on the upper and lower sides.
  • the elastic piece is welded through the mass block, and also functions to prevent polarization.
  • the elastic piece is welded through the mass, and the welding method greatly simplifies the process, which is beneficial to reducing the cost and improving the yield.
  • FIG. 1 is an exploded view of a linear vibration motor according to a first embodiment of the present invention
  • FIG. 2 is an assembled view of a spring piece and a mass block according to Embodiment 1 of the present invention
  • Figure 3 is a side view of Figure 2;
  • FIG. 4 is a schematic view showing welding of a spring piece and a mass block according to Embodiment 1 of the present invention
  • Figure 5 is a schematic view showing the welding of the elastic piece and the mass of the second embodiment of the present invention.
  • FIG. 6 is an assembled view of a spring piece and a mass block according to Embodiment 3 of the present invention.
  • Figure 7 is a side view of Figure 6.
  • an embodiment of the present invention provides a linear vibration motor including a casing, a mass 3, a spring 4, a basin frame 2, an FPCB 6, a magnet, a washer, and a coil, wherein the casing includes an upper casing 1 and a lower casing.
  • the elastic piece 4 is connected with the mass 3 and the outer casing, and the elastic piece 4 is provided at least two, respectively arranged on two sides of the symmetry of the mass 3, the elastic piece 4 provides the elastic force in the Z-axis direction, and the mass 3 moves up and down along the Z-axis direction (X, Y,
  • the Z-axis direction is shown in the coordinate system of Figure 1, where the focus O of the X, Y, and Z axes is at the center of the mass (i.e., the geometric center of the mass 3), and the Z-axis is perpendicular to the upper surface of the mass.
  • the X-axis passes through the center of the elastic piece 4 (i.e., the geometric center of the elastic piece 4, for example, see Fig.
  • the side of the mass 3 is provided with a support plate 31, and the support plate 31
  • the central position is provided with a notch 32 penetrating the support plate 31 in the up-and-down direction.
  • the elastic piece 4 is provided with two upper and lower vibrating arms 42, and the two vibrating arms 42 are rotated 180 degrees symmetrically about the X-axis direction (the X-axis direction is the coordinate system in FIG. 1).
  • the middle portion of the elastic piece 4 is fixed in the notch 32, and the two vibrating arms 42 of the elastic piece 4 are respectively located on the upper and lower sides of the support plate 31.
  • the elastic piece 4 is added to the composite layer by a single material, a composite material or a later processing.
  • the linear vibration motor further includes: a stopper 5, the stopper 5 is snapped into the notch 32, and the middle portion of the elastic piece 4 and the stopper 5 are jointly welded and fixed in the notch 32, and the welding point 33 is located in the notch 32 (see FIGS. 3 and 4). Shown).
  • This type of welding by means of the middle of the elastic piece 4 can greatly simplify the process, which is advantageous for reducing the cost and ensuring the yield.
  • the elastic piece 4 is an S-shaped elastic piece 4, the length of the S-shaped elastic piece 4 is greater than the length of the support plate 31, and the S-shaped elastic piece 4 is provided with two vibrating arms 42, two The vibrating arms 42 are rotated 180 degrees symmetrically about the X-axis direction.
  • the middle portion of the S-shaped elastic piece 4 is welded and fixed in the notch 32 of the support plate 31, and the two vibrating arms 42 are respectively located on the upper and lower sides of the support plate 31.
  • the free ends of the two vibrating arms 42 are provided with a welding plane 41 which is parallel to the plane of the height direction of the support plate 31, and the elastic sheets 4 are fixed inside the casing by welding the welding planes 41, respectively.
  • the support plates 31 are disposed at two sides and are respectively disposed on two sides of the mass 3, and the elastic pieces 4 are disposed correspondingly, and the elastic pieces 4 on both sides of the mass 3 are surrounded by the elastic pieces 4.
  • the Z axis is rotated 180 degrees symmetrically to ensure the balance of the vibration of the mass 3.
  • the support plates 31 can also be disposed at four sides and respectively disposed on the four sides of the mass 3, and the elastic pieces 4 are correspondingly arranged four, and the elastic pieces 4 on both sides of the symmetric block 3 are rotated 180 degrees symmetrically about the Z axis to ensure the quality. Block 3 vibration balance.
  • the two kinds of vibrating arms 42 are rotated 180 degrees symmetrically about the X-axis direction, and the elastic pieces 4 are symmetrically distributed on the symmetric sides or four sides of the mass 3, which can effectively increase the first-order vibration frequency of the vibration system.
  • the elastic piece 4 is an anti-Z-shaped elastic piece 4, and the length of the elastic piece 4 is not greater than the length of the support plate 31.
  • the anti-Z-shaped elastic piece 4 is provided with two vibrating arms 42 which are rotated 180 degrees symmetrically about the X-axis direction.
  • the middle portion of the anti-Z-shaped elastic piece 4 is welded and fixed in the notch 32 of the support plate 31, and the two vibrating arms 42 are respectively located on the upper and lower sides of the support plate 31.
  • the free ends of the two vibrating arms 42 are provided with a welding plane 41 which is parallel to the plane of the longitudinal direction of the support plate 31, and the two vibrating arms 42 are fixed inside the casing by welding the welding planes 41, respectively.
  • the support plates 31 are disposed in two and respectively disposed on two sides of the mass 3, and the elastic pieces 4 are correspondingly disposed.
  • the elastic pieces 4 on both sides of the symmetric block 3 are rotated 180 degrees around the Z axis. Symmetrical to ensure the balance of the vibration of the mass 3.
  • the support plates 31 can also be disposed at four sides and respectively disposed on the four sides of the mass 3, and the elastic pieces 4 are correspondingly arranged four, and the elastic pieces 4 on both sides of the symmetric block 3 are rotated 180 degrees symmetrically about the Z axis to ensure the quality.
  • the structure of the two kinds of vibrating arms 42 which are rotated 180 degrees symmetrically about the X-axis direction, and the arrangement of the elastic pieces 4 symmetrically on the bilateral sides or four sides of the mass 3 can effectively increase the first-order vibration frequency of the vibration system. The difference from the second-order vibration frequency, thus effectively preventing polarization.
  • the elastic piece 4 is composed of two V-shaped vibrating arms 42 and one connecting piece 43, and the V-shaped vibrating arm 42 and the connecting piece 43 are integrally formed, V-shaped.
  • the length of the vibrating arm 42 is not more than 1/2 of the length of the support plate 31.
  • the two V-shaped vibrating arms 42 are rotated 180 degrees symmetrically about the X-axis direction, and the openings of the two V-shaped vibrating arms 42 are opposed to each other.
  • the connecting piece 43 of the elastic piece 4 is fixed in the notch 32, and the two V-shaped vibrating arms 42 are respectively located on the upper and lower sides of the supporting plate 31.
  • the free ends of the two V-shaped vibrating arms 42 are provided with a welding plane 41, and the two V-shaped vibrating arms 42 are respectively welded and fixed to the inside of the casing by the welding plane 41.
  • the support plates are disposed two and respectively disposed on two sides of the mass 3 symmetrically, and the elastic pieces 4 are correspondingly disposed, and the elastic pieces 4 on both sides of the mass 3 are surrounded by the elastic pieces 4 .
  • the Z axis is rotated 180 degrees symmetrically to ensure the balance of the vibration of the mass 3.
  • the support plates can also be arranged four and arranged on the four sides of the mass 3 respectively, and the elastic pieces 4 are correspondingly arranged four, and the elastic pieces 4 on both sides of the symmetric block 3 are rotated 180 degrees symmetrically about the Z axis to ensure the quality block. 3 vibration balance.
  • the two kinds of vibrating arms 42 are rotated 180 degrees symmetrically about the X-axis direction, and the elastic pieces 4 are symmetrically distributed on the symmetric sides or four sides of the mass 3, which can effectively increase the first-order vibration frequency of the vibration system.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

一种线性振动马达，包括外壳（1，7）、质量块（3）、弹片（4），弹片连接质量块和外壳，提供Ｚ轴方向的弹力，使质量块沿Ｚ轴方向上下移动。弹片设置两个振动臂（42），两个振动臂围绕Ｘ轴方向旋转180度对称，弹片为Ｓ型、反Ｚ字型或者由两个Ｖ字型振动臂组合而成。弹片设置两个或四个，分别布置在质量块对称的两侧。该线性振动马达能够有效增加振动系统一阶振动频率与二阶振动频率间的差距，从而有效防止偏振的发生。

Description

一种线性振动马达 技术领域
本发明涉及线性振动马达，特别涉及一种线性振动马达的弹片。
背景技术
现有技术中的Z轴线性振动马达包括上壳和下壳，上壳和下壳组成的密封空间内包含有振动系统、FPCB和线圈，振动系统由螺旋弹片、永磁铁、质量块组成，螺旋弹片直径较大的底端固定在外壳上，质量块与螺旋弹片直径较小的顶端固定连接，在线圈与永磁铁的磁力作用下，永磁铁带动质量块沿Z轴上下往复移动，螺旋弹片同时进行反复拉伸和压缩的动作。
在常见的Z轴线性振动马达结构中，螺旋弹片直径较大的底端固定在下壳上，如中国发明专利“振动马达”(申请号：201610108737.4)中所公开的，弹性支撑件固定在下壳上。
在另一些Z轴线性振动马达结构中，螺旋弹片倒置，直径较大的底端固定在上壳上，如中国发明专利“一种线性振动马达及移动设备”(申请号：201510885265.9)中所公开的，弹片固定在上壳顶壁上。
理想状态下，螺旋弹片拉伸和压缩的动作也仅仅沿Z轴上下进行，但是由于螺旋弹片两端直径不同，一阶振动频率和二阶振动频率相近，因此现有的振动系统振动时容易发生偏振。一阶振动频率是指沿Z轴方向的振动频率，二阶振动频率是沿指X、Y轴方向的振动频率。
为了消除这种现象，可以通过增大螺旋弹片顶端直径的方法进行，让螺旋弹片两端直径趋于接近，两端直径越接近偏振的现象就越不明显，但是螺旋弹片的刚性也会被同时加强，振动系统的振动频率和振幅都会被降低，也就降低了振动马达的功率。
发明内容
鉴于上述问题，本发明提供了一种线性振动马达，以解决现有技术中的Z轴线性振动马达容易发生偏振的问题。
为达到上述目的，本发明的技术方案是这样实现的：
本发明提供一种线性振动马达，包括外壳、质量块、弹片，所述弹片连接所述质量块和外壳，所述弹片至少设置两个，分别布置在所述质量块对称的两侧，所述弹片提供Z轴方向的弹力，所述质量块沿Z轴方向上下移动；
所述质量块的侧边设置有支撑板，所述支撑板的中央位置设置有沿上下方向贯通所述支撑板的缺口；
所述弹片设置有上下两个振动臂，两个振动臂围绕X轴方向旋转180度对称，所述弹片的中部固定在所述缺口内，所述弹片的两个振动臂分别位于所述支撑板的上下两侧。
可选地，所述线性振动马达还包括：挡块，所述挡块卡入所述缺口，所述弹片的中部和所述挡块共同焊接固定在所述缺口内。
可选地，所述支撑板设置两个且分别布置在所述质量块对称的两个侧边，或者，所述支撑板设置四个且分别布置在质量块的四个侧边；所述弹片对应设置两个或四个；
所述质量块对称两侧的弹片围绕Z轴旋转180度对称。
可选地，所述弹片为S型弹片；
所述S型弹片的中部焊接固定在所述支撑板的缺口内，所述S型弹片设置两个振动臂，所述两个振动臂分别位于所述支撑板的上下两侧；两个振动臂的自由端设置有焊接平面，通过焊接平面分别焊接固定在所述外壳内侧。
可选地，所述S型弹片的长度大于所述支撑板的长度。
可选地，所述弹片由两个V字型振动臂和一个连接片组成，所述V字型振动臂和所述连接片一体成型；所述两个V字型振动臂围绕X轴方向旋转180度对称，且两个V字型振动臂的开口相对；
所述连接片固定在缺口内，两个V字型振动臂分别位于所述支撑板的上下两侧；两个V字型振动臂的自由端设置有焊接平面，通过焊接平面分别焊接固定在所述外壳内侧。
可选地，所述V字型振动臂的长度不大于所述支撑板长度的1/2。
可选地，所述弹片为反Z字型弹片；
所述反Z字型弹片的中部焊接固定在所述支撑板的缺口内，所述反Z字型弹片设置两个振动臂，两个振动臂分别位于所述支撑板的上下两侧；两个振动臂的自由端设置有焊接平面，通过焊接平面分别焊接固定在所述外壳内侧。
可选地，所述反Z字型弹片的长度不大于所述支撑板的长度。
可选地，所述弹片采用单一材料、复合材料或加工后期加入复合层。
采用上述结构设置的线性振动马达具有以下优点：
本发明中弹片分布于质量块两侧且对置分布，每一侧弹片上下均设置有振动臂，这种结构能有效增加振子系统一阶振动频率与二阶振动频率间的差距，有效防止偏振的发生。
本发明中将弹片贯穿质量块焊接，也能够起到防止偏振的作用。
本发明中将弹片贯穿质量块焊接，焊接的方式使得工艺上大大简化，有利于降低成本、提高成品率。
附图说明
图1是本发明实施例一的线性振动马达的爆炸图；
图2是本发明实施例一的弹片与质量块的组装图；
图3是图2的侧视图；
图4是本发明实施例一的弹片与质量块的焊接示意图；
图5是本发明实施例二的弹片与质量块的焊接示意图；
图6是本发明实施例三的弹片与质量块的组装图；
图7是图6的侧视图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施方式作进一步地详细描述。
实施例一
如图1所示，本发明实施例提供一种线性振动马达，包括外壳、质量块3、弹片4、盆架2、FPCB 6、磁铁、华司和线圈，其中，外壳包括上壳1和下壳7。弹片4连接质量块3和外壳，弹片4至少设置两个，分别布置在质量块3对称的两侧，弹片4提供Z轴方向的弹力，质量块3沿Z轴方向上下移动(X，Y，Z轴方向如图1中坐标系所示，其中，X，Y，Z轴的焦点O位于质量块的中心(即，质量块3的几何中心)处，且Z轴垂直于质量块的上表面，并且X轴穿过弹片4的中心(即，弹片4的几何中心，例如，参见图7，弹片的连接片43的中心位置)。质量块3的侧边设置有支撑板31，支撑板31的中央位置设置有沿上下方向贯通支撑板31的缺口32。弹片4设置有上下两个振动臂42，两个振动臂42围绕X轴方向旋转180度对称(X轴方向如图1中坐标系所示)。弹片4的中部固定在缺口32内，弹片4的两个振动臂42分别位于支撑板31的上下两侧。弹片4采用单一材料、复合材料或加工后期加入复合层。
线性振动马达还包括：挡块5，挡块5卡入缺口32，弹片4的中部和挡块5共同焊接固定在缺口32内，焊点33位于所述缺口32内(如图3和图4所示)。该种通过弹片4中部进行焊接固定的方式能够大大简化工艺，有利于降低成本以及保证成品率。
在本发明实施例中，如图2和图3共同所示，弹片4为S型弹片4，S型弹片4的长度大于支撑板31的长度，S型弹片4设置两个振动臂42，两个振动臂42围绕X轴方向旋转180度对称。S型弹片4的中部焊接固定在支撑板31的缺口32内，两个振动臂42分别位于支撑板31的上下两侧。两个振动臂42的自由端设置有焊接平面41，焊接平面41与支撑板31高度方向的平面平行，弹片4通过分别对焊接平面41进行焊接而被固定在外壳内侧。
在本发明实施例中，如图2所示，支撑板31设置两个且分别布置在质量块3对称的两个侧边，弹片4对应设置两个，质量块3对称两侧的弹片4围绕Z轴旋转180度对称，以保证质量块3振动的平衡。当然，支撑板31也可设置四个且分别布置在质量块3的四个侧边，弹片4对应设置四个，质量块3对称两侧的弹片4围绕Z轴旋转180度对称，以保证质量块3振动的 平衡。该种两个振动臂42围绕X轴方向旋转180度对称的弹片4结构，以及将弹片4对称分布于质量块3对称的两侧或四侧的布置，能够有效增加振动系统一阶振动频率与二阶振动频率间的差距，从而有效防止偏振。
实施例二
在本发明实施例中，如图5所示，弹片4为反Z字型弹片4，弹片4的长度不大于支撑板31的长度。反Z字型弹片4设置两个振动臂42，两个振动臂42围绕X轴方向旋转180度对称。反Z字型弹片4的中部焊接固定在支撑板31的缺口32内，两个振动臂42分别位于支撑板31的上下两侧。两个振动臂42的自由端设置有焊接平面41，焊接平面41与支撑板31长度方向的平面平行，两个振动臂42通过分别对焊接平面41进行焊接而固定在外壳内侧。
在本发明实施例中，支撑板31设置为两个且分别布置在质量块3对称的两个侧边，弹片4对应设置两个，质量块3对称两侧的弹片4围绕Z轴旋转180度对称，以保证质量块3振动的平衡。当然，支撑板31也可设置四个且分别布置在质量块3的四个侧边，弹片4对应设置四个，质量块3对称两侧的弹片4围绕Z轴旋转180度对称，以保证质量块3振动的平衡。该种两个振动臂42围绕X轴方向旋转180度对称的弹片4的结构，以及将弹片4对称分布于质量块3对称的两侧或四侧的布置，能够有效增加振动系统一阶振动频率与二阶振动频率间的差距，从而有效防止偏振。
实施例三
在本发明实施例中，如图6和图7共同所示，弹片4由两个V字型振动臂42和一个连接片43组成，V字型振动臂42和连接片43一体成型，V字型振动臂42的长度不大于支撑板31长度的1/2。两个V字型振动臂42围绕X轴方向旋转180度对称，且两个V字型振动臂42的开口相对。该弹片4的连接片43固定在缺口32内，两个V字型振动臂42分别位于支撑板31的上下两侧。两个V字型振动臂42的自由端设置有焊接平面41，两个V字型振动臂42通过焊接平面41分别焊接固定在外壳内侧。
在本发明实施例中，如图6所示，支撑板设置两个且分别布置在质量块3对称的两个侧边，弹片4对应设置两个，质量块3对称两侧的弹片4围绕 Z轴旋转180度对称，以保证质量块3振动的平衡。当然，支撑板也可设置四个且分别布置在质量块3的四个侧边，弹片4对应设置四个，质量块3对称两侧的弹片4围绕Z轴旋转180度对称，以保证质量块3振动的平衡。该种两个振动臂42围绕X轴方向旋转180度对称的弹片4结构，以及将弹片4对称分布于质量块3对称的两侧或四侧的布置，能够有效增加振动系统一阶振动频率与二阶振动频率间的差距，从而有效防止偏振。
以上仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等，均包含在本发明的保护范围内。

Claims (10)

  1. 一种线性振动马达，包括外壳、质量块、弹片，所述弹片连接所述质量块和外壳，其特征在于，所述弹片至少设置两个，分别布置在所述质量块对称的两侧，所述弹片提供Z轴方向的弹力，所述质量块沿Z轴方向上下移动；
    所述质量块的侧边设置有支撑板，所述支撑板的中央位置设置有沿上下方向贯通所述支撑板的缺口；
    所述弹片设置有上下两个振动臂，所述两个振动臂围绕X轴方向旋转180度对称，所述弹片的中部固定在所述缺口内，所述弹片的两个振动臂分别位于所述支撑板的上下两侧。
  2. 根据权利要求1所述的线性振动马达，其特征在于，所述线性振动马达还包括：挡块，所述挡块卡入所述缺口，所述弹片的中部和所述挡块共同焊接固定在所述缺口内。
  3. 根据权利要求2所述的线性振动马达，其特征在于，所述支撑板设置两个且分别布置在所述质量块对称的两个侧边，或者，所述支撑板设置四个且分别布置在质量块的四个侧边；所述弹片对应设置两个或四个；
    所述质量块对称两侧的弹片围绕Z轴旋转180度对称。
  4. 根据权利要求3所述的线性振动马达，其特征在于，所述弹片为S型弹片；
    所述S型弹片的中部焊接固定在所述支撑板的缺口内，所述S型弹片设置两个振动臂，所述两个振动臂分别位于所述支撑板的上下两侧；两个振动臂的自由端设置有焊接平面，所述两个振动臂通过对所述焊接平面分别进行焊接而被固定在所述外壳内侧。
  5. 根据权利要求4所述的线性振动马达，其特征在于，所述S型弹片的长度大于所述支撑板的长度。
  6. 根据权利要求3所述的线性振动马达，其特征在于，所述弹片由两个V字型振动臂和一个连接片组成，所述V字型振动臂和所述连接片一体成型；所述两个V字型振动臂围绕X轴方向旋转180度对称，且所述两个V字型振动臂的开口相对；
    所述连接片固定在所述缺口内，所述两个V字型振动臂分别位于所述支撑板的上下两侧；所述两个V字型振动臂的自由端设置有焊接平面，所述两个V字型振动臂通过对所述焊接平面分别进行焊接而被固定在所述外壳内侧。
  7. 根据权利要求6所述的线性振动马达，其特征在于，所述V字型振动臂的长度不大于所述支撑板长度的1/2。
  8. 根据权利要求3所述的线性振动马达，其特征在于，所述弹片为反Z字型弹片；
    所述反Z字型弹片的中部焊接固定在所述支撑板的缺口内，所述反Z字型弹片设置两个振动臂，所述两个振动臂分别位于所述支撑板的上下两侧；所述两个振动臂的自由端设置有焊接平面，所述两个振动臂通过对所述焊接平面分别进行焊接而被固定在所述外壳内侧。
  9. 根据权利要求8所述的线性振动马达，其特征在于，所述反Z字型弹片的长度不大于所述支撑板的长度。
  10. 根据权利要求1所述的线性振动马达，其特征在于，所述弹片采用单一材料、复合材料，或在加工后期加入复合层。
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