WO2022001644A1 - 一种非接触式振动阻尼的线性振动电机及其实现方法 - Google Patents

一种非接触式振动阻尼的线性振动电机及其实现方法 Download PDF

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Publication number
WO2022001644A1
WO2022001644A1 PCT/CN2021/099922 CN2021099922W WO2022001644A1 WO 2022001644 A1 WO2022001644 A1 WO 2022001644A1 CN 2021099922 W CN2021099922 W CN 2021099922W WO 2022001644 A1 WO2022001644 A1 WO 2022001644A1
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WIPO (PCT)
Prior art keywords
fpc
coil
counterweight
vibration motor
linear vibration
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PCT/CN2021/099922
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English (en)
French (fr)
Inventor
黄浩静
王欣欣
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浙江省东阳市东磁诚基电子有限公司
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Priority to US18/003,324 priority Critical patent/US20230253865A1/en
Publication of WO2022001644A1 publication Critical patent/WO2022001644A1/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
    • H02K33/16—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
    • H02K33/02—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
    • 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
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • 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
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
    • H02K2203/03—Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations

Definitions

  • the invention belongs to the technical field of vibration motors, and in particular relates to a non-contact vibration damping linear vibration motor and a realization method thereof.
  • the purpose of the present invention is to provide a non-contact vibration damping linear vibration motor to solve the above-mentioned problems in the background art.
  • the non-contact vibration damping linear vibration motor provided by the invention has the advantages of good magnetic rigidity linearity, good vibration consistency, small space occupied by springs, high utilization rate of structure space, larger electromagnetic damping, and stopping time after the motor is powered off. It is shorter, the process is simple, the manufacturability is strong, and the cost is low.
  • Another object of the present invention is to provide a method for realizing a non-contact vibration damped linear vibration motor.
  • a non-contact vibration damping linear vibration motor comprising a casing and a lower bracket, a stator assembly is arranged above the lower bracket, and a vibrator is sleeved outside the stator assembly
  • the outer part of the vibrator assembly is covered with a casing, and the two sides of the vibrator assembly are connected to the casing by springs.
  • the spring is an S-shaped structure.
  • the vibrator assembly includes a counterweight block. There is a balance block above the group.
  • the inside of the counterweight block is provided with an accommodating groove for accommodating the balancing block and the magnetic steel group.
  • limit slots are symmetrically arranged on both sides of the counterweight block, and limit plates corresponding to the limit slots are arranged on the casing.
  • a bracket is connected above the counterweight.
  • blocking pieces are connected to both ends of the spring.
  • the stator assembly includes a pole core, a loss piece, a coil and an FPC, wherein the FPC is arranged above the lower bracket, the coil is arranged above the FPC, the loss piece is arranged above the coil, and the pole core is arranged through Inside of the loss sheet, coil, FPC and lower bracket.
  • the lower bracket, the FPC and the loss sheet are all provided with positioning grooves corresponding to the pole cores.
  • the magnetic steel group includes several permanent magnets arranged in parallel.
  • the method for realizing the non-contact vibration damping linear vibration motor comprises the following steps:
  • the casing and the lower bracket form a closed cavity for accommodating the internal stator assembly and vibrator assembly
  • stator assembly The pole core, the loss piece, the coil and the FPC form the stator assembly, and the coil and the FPC form a circuit, which generates an electric field when energized, and the electric field interacts with the magnetic field to drive the motor to vibrate;
  • the spring provides elastic force for the movement of the motor, which makes the motor vibrate back and forth.
  • the interior of the counterweight is provided with an accommodation slot for accommodating the counterweight and the magnetic steel group, and the two sides of the counterweight are symmetrically arranged
  • a limit slot for accommodating the counterweight and the magnetic steel group
  • a limit plate corresponding to the limit slot is arranged on the casing
  • a bracket is connected to the upper part of the counterweight
  • baffle plates are connected to both ends of the spring.
  • the stator assembly includes a pole core, a loss piece, a coil and FPC, wherein the FPC is arranged above the lower bracket, the coil is arranged above the FPC, the loss piece is arranged above the coil, and the pole core is arranged through the loss piece, the coil, the FPC and the inside of the lower bracket, the lower bracket, the FPC And the loss pieces are all provided with positioning slots corresponding to the pole cores, and the magnetic steel group includes several permanent magnets arranged in parallel.
  • the present invention has a more compact structure, and is extremely suitable for motors with small volume or small vibration direction size;
  • the spring of the present invention occupies a small space, but can provide a large deformation space, ensure the vibration feeling under small size, and increase the space utilization rate of the product;
  • the present invention can quickly dissipate the vibration kinetic energy after power failure in the form of thermal energy, ensuring the damping of the motor;
  • the damping of the motor of the present invention is little affected by temperature, does not change the state of spring stress, and does not bring about reliability problems such as life;
  • Both the shell and the lower bracket of the present invention use magnetic conductive materials, which can greatly reduce the leakage of the magnetic field of the permanent magnet outside the product and reduce the impact on other electrical, acoustic, magnetic and other components;
  • the present invention can keep the total volume of the coil and the loss piece unchanged, adapt to different driving schemes by adjusting the volume ratio of the coil and the loss piece, and keep the vibration damping unchanged.
  • Fig. 1 is the structural explosion schematic diagram of the present invention
  • FIG. 2 is a schematic structural diagram of the connection between the vibrator assembly and the casing of the present invention
  • FIG. 3 is a schematic structural diagram of a stator assembly of the present invention.
  • Fig. 4 is the structural representation of the spring of the present invention.
  • Fig. 5 is the sectional structure schematic diagram of the present invention.
  • Fig. 6 is the structural representation of the counterweight block of the present invention.
  • FIG. 7 is a schematic structural diagram of a lower bracket of the present invention.
  • Fig. 8 is the structural schematic diagram of the force direction of the vibrator assembly of the present invention.
  • Embodiment 9 is a schematic structural diagram of Embodiment 2 of the present invention.
  • Chassis 2. Bracket; 3. Counterweight; 31. Receiving slot; 32. Limiting slot; 4. Balance block; 5. Permanent magnet; 6. Limiting plate; 7. Pole core; 8, loss sheet; 9, spring; 10, FPC; 11, lower bracket; 111, positioning slot; 12, coil; 13, baffle.
  • a non-contact vibration damping linear vibration motor comprising a casing 1 and a lower bracket 11, a stator assembly is arranged above the lower bracket 11, and the stator assembly is A vibrator assembly is sleeved outside, a casing 1 is sleeved on the outside of the vibrator assembly, both sides of the vibrator assembly are connected with the casing 1 through a spring 9, the spring 9 is an S-shaped structure, and the vibrator assembly includes a counterweight block 3, a counterweight block A magnetic steel group is arranged inside 3, and a balance block 4 is arranged above the magnetic steel group.
  • the interior of the counterweight block 3 is provided with an accommodating groove 31 for accommodating the counterweight block 4 and the magnetic steel group, and the bracket 2 is welded and connected above the counterweight block 3 .
  • the balance weight 4 is embedded in the interior of the accommodating groove 31, and is welded to the bracket 2, and the magnetic steel group is embedded in the interior of the accommodating groove 31, and is bonded with the inner wall of the counterweight block 3 by glue;
  • the balance block 4 is a non-magnetic material such as a high specific gravity alloy, and tungsten alloy is selected in this embodiment to balance the unbalanced suction force caused by the magnetic conductive material such as the pole core 7, the casing 1, and the lower bracket 11 (
  • the casing 1, the lower bracket 11, and the pole core 7 are all magnetically conductive materials, which have an attractive force on the permanent magnet 5. Due to the asymmetrical structure in the thickness direction, it is necessary to adjust the suction force balance), so that the vibrator assembly is initially The resultant force in all directions of the position is zero, which reduces the influence of the magnetic characteristics of the vibrator assembly on the life of the spring 9;
  • the bracket 2 provides assembly support for the fixed connection of the balance block 4 and the magnetic steel group to ensure that they can be fixed in the accommodation groove 31 of the counterweight block 3;
  • the counterweight 3 is a non-magnetic material such as a high specific gravity alloy.
  • a tungsten alloy is used. Its main function is to provide weight for the vibrator assembly and ensure vibration sense. Nice space.
  • limit slots 32 are symmetrically arranged on both sides of the counterweight block 3 , and limit plates 6 corresponding to the limit slots 32 are arranged on the casing 1 .
  • the limit slot 32 cooperates with the limit plate 6 to limit the stroke of the counterweight 3 to control the limit stroke of the vibrator assembly, so as to ensure that the stress of each component under the limit stroke will not be too large, thereby increasing the The service life of the vibration motor.
  • blocking pieces 13 are connected to both ends of the spring 9 .
  • the baffle 13 converts the fixing method from point fixing (welding) to surface fixing (surface fitting), so as to ensure the smooth operation of the spring 9 during operation;
  • the spring 9 has an "S"-shaped structure with four corners on it, which are the main deformation areas. After deformation, the stress is mainly distributed in these areas, which effectively reduces the stress level, so that the spring 9 can have a relatively large deformation while having a relatively large deformation. Good life performance, the distance from the upper arc end to the flat end on the other side provides space for the spring to deform.
  • the stator assembly includes a pole core 7, a loss piece 8, a coil 12 and an FPC 10, wherein the FPC 10 is arranged above the lower bracket 11, the coil 12 is arranged above the FPC 10, the loss piece 8 is arranged above the coil 12, and the pole core 7 is provided through the loss sheet 8 , the coil 12 , the FPC 10 and the inside of the lower bracket 11 .
  • the loss sheet 8 is made of high electromagnetic loss material, such as copper, aluminum, iron, copper-iron alloy, etc.
  • copper is used, and the coil 12 is penetrated by a pole core 7, and the magnetic field on the pole core 7 changes. It causes induced electromotive force and induced current to be generated on the coil 12, and copper loss is generated, which provides reliable energy consumption for motor vibration and stop; due to the small change of its electromagnetic characteristics within the working temperature range, the motor damping does not change significantly with the change of the working environment temperature. ;
  • the shape, size and thickness of the loss sheet 8 can be adjusted, and in cooperation with the coil 12, it can provide various sizes of damping and adapt to various driving schemes;
  • the vibrator assembly also stores mechanical energy such as elastic potential energy and kinetic energy
  • the product enters free vibration, and the permanent magnet 5 on the vibrator assembly also moves accordingly.
  • the magnetic flux is constantly changing, and a constantly changing induced electromotive force is generated on the coil 12 and the loss piece 8, resulting in copper loss, and at the same time, the pole core 7 also produces iron loss.
  • the energy of the above loss comes from mechanical energy and is dissipated in the form of internal energy, so that the mechanical energy Continuously lowering, which speeds up the stop of the vibrator assembly and reduces the motor stop time.
  • the lower bracket 11 , the FPC 10 and the loss sheet 8 are all provided with positioning grooves 111 corresponding to the pole core 7 .
  • the positioning grooves 111 on the lower bracket 11 provide positioning for the assembly of the pole core 7 , and the positioning grooves 111 on the FPC 10 and the loss piece 8 can be accurately assembled under the positioning of the pole core 7 .
  • the magnetic steel group includes two permanent magnets 5 arranged in parallel.
  • the magnetic steel group is small in size, the magnetic path is short, the utilization rate of the magnetic field is high, and the two external parts of the casing 1 and the lower bracket 11 are magnetic conductive materials, so the magnetic leakage of the product is small, which can effectively avoid Electromagnetic compatibility issues.
  • the difference between this embodiment and Embodiment 1 is that further, the magnetic steel group includes three permanent magnets 5 arranged in parallel.
  • the implementation method of the non-contact vibration damping linear vibration motor according to the present invention comprises the following steps:
  • the casing 1 and the lower bracket 11 form a closed cavity for accommodating the internal stator assembly and vibrator assembly;
  • the counterweight block 3, the balance block 4 and the magnetic steel group constitute a vibrator assembly, and the magnetic steel group provides a magnetic field for the motor drive;
  • the pole core 7, the loss piece 8, the coil 12 and the FPC10 constitute the stator assembly, the coil 12 and the FPC10 constitute a circuit, an electric field is generated when energized, and the electric field interacts with the magnetic field to drive the motor to vibrate;
  • the spring 9 provides elastic force for the movement of the motor, so that the motor vibrates back and forth.
  • the present invention has a more compact structure, and is extremely suitable for motors with small volume or small vibration direction; the spring of the present invention occupies a small space, but can provide a large deformation space , which ensures the vibration sense under small size and increases the space utilization rate of the product; due to the electromagnetic interaction between the permanent magnet, the pole core, the loss piece, the coil, etc., the present invention can quickly eliminate the vibration after power failure.
  • the kinetic energy is dissipated in the form of thermal energy, which ensures the damping of the motor; the damping of the motor of the present invention is little affected by temperature, and does not change the state of spring stress, and does not bring about reliability problems such as life;
  • the magnetic material can greatly reduce the leakage of the magnetic field of the permanent magnet to the outside of the product, and reduce the impact on the remaining electrical, acoustic, magnetic and other components; the invention can keep the total volume of the coil and the loss piece unchanged, and adjust the coil , The volume ratio of the loss sheet is suitable for different drive schemes, and the vibration damping remains unchanged.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Linear Motors (AREA)

Abstract

一种非接触式振动阻尼的线性振动电机，包括机壳（1）和下托架（11），下托架（11）的上方设有定子组件，定子组件的外部套设有振子组件，振子组件的外部套设有机壳（1），振子组件的两侧通过弹簧（9）与机壳（1）连接，弹簧（9）为S形结构，振子组件包括配重块（3），配重块（3）的内部设有磁钢组，磁钢组的上方设有平衡块（4）；以及一种非接触式振动阻尼的线性振动电机的实现方法。该线性振动电机相比于现有技术的线性振动电机，结构更加紧密，极其适合体积小或者振动方向尺寸较小的电机；弹簧占用空间小，但可提供较大形变空间，保证了小尺寸下的振感，增大了产品的空间利用率。

Description

一种非接触式振动阻尼的线性振动电机及其实现方法 技术领域
本发明属于振动电机技术领域，具体涉及一种非接触式振动阻尼的线性振动电机及其实现方法。
背景技术
近年来，随着手机等智能消费电子设备的市场不断扩张，带动了相关产业的不断升级，从视觉、听觉、摄像、触感等等多方面进行比较，以求获得更多消费者的青睐。线性振动电机作为触感提供部件中的精品，在竞争中显露越来越关键的作用。但受限于成本差异，目前国内手机端更倾向于小尺寸的线性电机。如何在小体积下保持较高的性能成为一个持续研究的技术方向。
同时，为了降低线性电机断电后的停振时间，往往需要想办法提高振动阻尼。磁流体由于占用空间可以忽略不计，定中性好，所以曾一直作为主要的阻尼手段。但随着越来越严苛的环境试验条件，其随温度变化的阻尼特性成了影响客户体验的重大缺陷。在此基础上，业内又提出使用泡棉、弹性胶水等弹性固体作为损耗部件，损耗断电后的振动动能，但由于其往往作用于弹簧(接触式振动阻尼)，改变了弹簧本身的应力分布，带来了寿命类可靠性问题。因此，提出更加优越的阻尼结构设计方案去规避上述问题，就显得尤为重要。
发明内容
本发明的目的在于提供一种非接触式振动阻尼的线性振动电机，以解决上述背景技术中提出的问题。本发明提供的一种非接触式振动阻尼的线性振动电机，具有磁刚度线性度好，振动一致性好，弹簧占用空间小，结构空间利用率高，电磁阻尼更大，电机断电后停止时间更短，工艺简单，可制造性强，成本低的特点。
本发明另一目的在于提供一种非接触式振动阻尼的线性振动电机的实现 方法。
为实现上述目的，本发明提供如下技术方案：一种非接触式振动阻尼的线性振动电机，包括机壳和下托架，下托架的上方设有定子组件，定子组件的外部套设有振子组件，振子组件的外部套设有机壳，振子组件的两侧通过弹簧与机壳连接，弹簧为S形结构，振子组件包括配重块，配重块的内部设有磁钢组，磁钢组的上方设有平衡块。
在本发明中进一步地，配重块的内部设有用于容纳平衡块和磁钢组的容纳槽。
在本发明中进一步地，配重块的两侧对称设置有限位槽，机壳上设有与限位槽相对应的限位板。
在本发明中进一步地，配重块的上方连接有支架。
在本发明中进一步地，弹簧的两端上连接有挡片。
在本发明中进一步地，定子组件包括极芯、损耗片、线圈和FPC，其中，FPC设置在下托架的上方，线圈设置在FPC的上方，损耗片设置在线圈的上方，极芯贯穿设置在损耗片、线圈、FPC和下托架的内部。
在本发明中进一步地，下托架、FPC以及损耗片上均设有与极芯相对应的定位槽。
在本发明中进一步地，磁钢组包括若干个并列设置的永磁体。
在本发明中进一步地，所述的非接触式振动阻尼的线性振动电机的实现方法，包括以下步骤：
(一)、机壳和下托架构成封闭的容腔，用于容纳内部的定子组件和振子组件；
(二)、配重块、平衡块和磁钢组构成振子组件，磁钢组为电机驱动提供磁场；
(三)、极芯、损耗片、线圈和FPC构成定子组件，线圈和FPC构成电路， 通电时产生电场，电场与磁场相互作用，驱动电机振动；
(四)、弹簧为电机的运动提供弹力，使电机往复振动。
在本发明中进一步地，所述的非接触式振动阻尼的线性振动电机的实现方法，配重块的内部设有用于容纳平衡块和磁钢组的容纳槽，配重块的两侧对称设置有限位槽，机壳上设有与限位槽相对应的限位板，配重块的上方连接有支架，弹簧的两端上连接有挡片，定子组件包括极芯、损耗片、线圈和FPC，其中，FPC设置在下托架的上方，线圈设置在FPC的上方，损耗片设置在线圈的上方，极芯贯穿设置在损耗片、线圈、FPC和下托架的内部，下托架、FPC以及损耗片上均设有与极芯相对应的定位槽，磁钢组包括若干个并列设置的永磁体。
与现有技术相比，本发明的有益效果是：
1、本发明相比于现有技术的线性振动电机，结构更加紧密，极其适合体积小或者振动方向尺寸较小的电机；
2、本发明的弹簧占用空间小，但可提供较大形变空间，保证了小尺寸下的振感，增大了产品的空间利用率；
3、本发明由于永磁体、极芯、损耗片、线圈等之间的电磁相互作用，能够很快得将断电后的振动动能以热能形式耗散，保证了电机阻尼；
4、本发明电机阻尼受温度影响很小，且不改变弹簧应力状态，不会带来寿命类的可靠性问题；
5、本发明外壳和下托架均使用导磁材料，可以极大程度地减小永磁体的磁场泄露在产品外侧，降低对其余电、声、磁等部件部件的影响；
6、本发明可以保持线圈、损耗片的总体积不变，通过调整线圈、损耗片的体积占比适配不同驱动方案，且保持振动阻尼不变。
附图说明
图1为本发明的结构爆炸示意图；
图2为本发明振子组件与机壳连接的结构示意图；
图3为本发明定子组件的结构示意图；
图4为本发明弹簧的结构示意图；
图5为本发明的剖视结构示意图；
图6为本发明配重块的结构示意图；
图7为本发明下托架的结构示意图；
图8为本发明振子组件受力方向的结构示意图；
图9为本发明实施例2的结构示意图；
图中：1、机壳；2、支架；3、配重块；31、容纳槽；32、限位槽；4、平衡块；5、永磁体；6、限位板；7、极芯；8、损耗片；9、弹簧；10、FPC；11、下托架；111、定位槽；12、线圈；13、挡片。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例1
请参阅图1-8，本发明提供以下技术方案：一种非接触式振动阻尼的线性振动电机，包括机壳1和下托架11，下托架11的上方设有定子组件，定子组件的外部套设有振子组件，振子组件的外部套设有机壳1，振子组件的两侧通过弹簧9与机壳1连接，弹簧9为S形结构，振子组件包括配重块3，配重块3的内部设有磁钢组，磁钢组的上方设有平衡块4。
进一步地，配重块3的内部设有用于容纳平衡块4和磁钢组的容纳槽31，配重块3的上方焊接连接有支架2。
通过采用上述技术方案，平衡块4嵌入在容纳槽31的内部，并与支架2 焊接连接，磁钢组嵌入在容纳槽31的内部，并与配重块3的内壁通过胶水粘接；
具体的，平衡块4为高比重合金等不导磁材料，本实施例选用钨合金，用于平衡由于极芯7、机壳1、下托架11等导磁材料引起的吸力不平衡问题(FPC10未通电时，机壳1、下托架11、极芯7均为导磁材料，对永磁体5存在吸引力，由于厚度方向结构不对称，因此需要调节吸力平衡)，使得振子组件在初始位置各个方向合力为零，减小振子组件磁特性对弹簧9寿命的影响；
具体的，支架2为平衡块4、磁钢组固连提供组装支撑，保证它们能够被固定于配重块3的容纳槽31内；
具体的，配重块3为高比重合金等不导磁材料，本实施例选用钨合金，其主要作用是为振子组件提供重量，保证振感，同时其上各台面结构为部件组装、避让提供很好的空间。
进一步地，配重块3的两侧对称设置有限位槽32，机壳1上设有与限位槽32相对应的限位板6。
通过采用上述技术方案，通过限位槽32与限位板6配合，用于限制配重块3行程从而控制振子组件的极限行程，以保证极限行程下的各组件应力不会过大，从而增加振动电机的使用寿命。
进一步地，弹簧9的两端上连接有挡片13。
通过采用上述技术方案，挡片13使得固定方式从点固定(焊接)转化为面固定(面贴合)，保证工作中弹簧9平稳运行；
具体的，弹簧9呈“S”形结构，其上有四处折角，为主要变形区域，变形后应力主要分布于这些区域，有效降低应力水平，使得弹簧9能够在有较大形变的同时具有较好的寿命表现，其上圆弧端到另一侧平端的距离为弹簧变形提供了空间。
进一步地，定子组件包括极芯7、损耗片8、线圈12和FPC10，其中，FPC10设置在下托架11的上方，线圈12设置在FPC10的上方，损耗片8设置在线圈12的上方，极芯7贯穿设置在损耗片8、线圈12、FPC10和下托架11的内部。
通过采用上述技术方案，损耗片8为高电磁损耗材料，如铜、铝、铁、铜铁合金等，本实施例选用铜，其与线圈12内部贯穿有极芯7，极芯7上变化的磁场使得其与线圈12上产生感应电动势和感应电流，产生铜损，为电机振动和停止提供可靠能耗；由于工作温度范围内其电磁特性变化较小，故电机阻尼不随工作环境温度变化而明显变化；
具体的，损耗片8的外形、大小、厚度均可调节，与线圈12配合可提供多种大小的阻尼和适配多种驱动方案；
具体的，FPC10供电中断后，由于振子组件还存储有弹性势能和动能等机械能，产品进入自由振动，而振子组件上的永磁体5也随之运动，永磁体5的运动，导致极芯7的磁通不断变化，在线圈12和损耗片8上产生不断变化的感应电动势，产生铜损，同时极芯7也产生铁损，上述损耗的能量来自于机械能并以内能的形式耗散，使得机械能不断降低，从而加快了振子组件的停止，降低了电机停止时间。
进一步地，下托架11、FPC10以及损耗片8上均设有与极芯7相对应的定位槽111。
通过采用上述技术方案，下托架11上的定位槽111为极芯7的组装提供定位，FPC10以及损耗片8上定位槽111可以在极芯7的定位下进行精确的组装。
进一步地，磁钢组包括两个并列设置的永磁体5。
通过采用上述技术方案，磁钢组体积较小，磁路径短，磁场利用率高且机壳1和下托架11这两个外型件均为导磁材料，故产品漏磁小，有效避免电 磁兼容问题。
实施例2
请参阅图9，本实施例与实施例1不同之处在于：进一步地，磁钢组包括三个并列设置的永磁体5。
进一步地，本发明所述的非接触式振动阻尼的线性振动电机的实现方法，包括以下步骤：
(一)、机壳1和下托架11构成封闭的容腔，用于容纳内部的定子组件和振子组件；
(二)、配重块3、平衡块4和磁钢组构成振子组件，磁钢组为电机驱动提供磁场；
(三)、极芯7、损耗片8、线圈12和FPC10构成定子组件，线圈12和FPC10构成电路，通电时产生电场，电场与磁场相互作用，驱动电机振动；
(四)、弹簧9为电机的运动提供弹力，使电机往复振动。
综上所述，本发明相比于现有技术的线性振动电机，结构更加紧密，极其适合体积小或者振动方向尺寸较小的电机；本发明的弹簧占用空间小，但可提供较大形变空间，保证了小尺寸下的振感，增大了产品的空间利用率；本发明由于永磁体、极芯、损耗片、线圈等之间的电磁相互作用，能够很快得将断电后的振动动能以热能形式耗散，保证了电机阻尼；本发明电机阻尼受温度影响很小，且不改变弹簧应力状态，不会带来寿命类的可靠性问题；本发明外壳和下托架均使用导磁材料，可以极大程度地减小永磁体的磁场泄露在产品外侧，降低对其余电、声、磁等部件部件的影响；本发明可以保持线圈、损耗片的总体积不变，通过调整线圈、损耗片的体积占比适配不同驱动方案，且保持振动阻尼不变。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行 多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

Claims (10)

  1. 一种非接触式振动阻尼的线性振动电机，包括机壳(1)和下托架(11)，其特征在于：下托架(11)的上方设有定子组件，定子组件的外部套设有振子组件，振子组件的外部套设有机壳(1)，振子组件的两侧通过弹簧(9)与机壳(1)连接，弹簧(9)为S形结构，振子组件包括配重块(3)，配重块(3)的内部设有磁钢组，磁钢组的上方设有平衡块(4)。
  2. 根据权利要求1所述的一种非接触式振动阻尼的线性振动电机，其特征在于：配重块(3)的内部设有用于容纳平衡块(4)和磁钢组的容纳槽(31)。
  3. 根据权利要求1所述的一种非接触式振动阻尼的线性振动电机，其特征在于：配重块(3)的两侧对称设置有限位槽(32)，机壳(1)上设有与限位槽(32)相对应的限位板(6)。
  4. 根据权利要求1所述的一种非接触式振动阻尼的线性振动电机，其特征在于：配重块(3)的上方连接有支架(2)。
  5. 根据权利要求1所述的一种非接触式振动阻尼的线性振动电机，其特征在于：弹簧(9)的两端上连接有挡片(13)。
  6. 根据权利要求1所述的一种非接触式振动阻尼的线性振动电机，其特征在于：定子组件包括极芯(7)、损耗片(8)、线圈(12)和FPC(10)，其中，FPC(10)设置在下托架(11)的上方，线圈(12)设置在FPC(10)的上方，损耗片(8)设置在线圈(12)的上方，极芯(7)贯穿设置在损耗片(8)、线圈(12)、FPC(10)和下托架(11)的内部。
  7. 根据权利要求6所述的一种非接触式振动阻尼的线性振动电机，其特征在于：下托架(11)、FPC(10)以及损耗片(8)上均设有与极芯(7)相对应的定位槽(111)。
  8. 根据权利要求1所述的一种非接触式振动阻尼的线性振动电机，其特征在于：磁钢组包括若干个并列设置的永磁体(5)。
  9. 根据权利要求1-8任一项所述的非接触式振动阻尼的线性振动电机的 实现方法，其特征在于，包括以下步骤：
    (一)、机壳(1)和下托架(11)构成封闭的容腔，用于容纳内部的定子组件和振子组件；
    (二)、配重块(3)、平衡块(4)和磁钢组构成振子组件，磁钢组为电机驱动提供磁场；
    (三)、极芯(7)、损耗片(8)、线圈(12)和FPC(10)构成定子组件，线圈(12)和FPC(10)构成电路，通电时产生电场，电场与磁场相互作用，驱动电机振动；
    (四)、弹簧(9)为电机的运动提供弹力，使电机往复振动。
  10. 根据权利要求9所述的非接触式振动阻尼的线性振动电机的实现方法，其特征在于：配重块(3)的内部设有用于容纳平衡块(4)和磁钢组的容纳槽(31)，配重块(3)的两侧对称设置有限位槽(32)，机壳(1)上设有与限位槽(32)相对应的限位板(6)，配重块(3)的上方连接有支架(2)，弹簧(9)的两端上连接有挡片(13)，定子组件包括极芯(7)、损耗片(8)、线圈(12)和FPC(10)，其中，FPC(10)设置在下托架(11)的上方，线圈(12)设置在FPC(10)的上方，损耗片(8)设置在线圈(12)的上方，极芯(7)贯穿设置在损耗片(8)、线圈(12)、FPC(10)和下托架(11)的内部，下托架(11)、FPC(10)以及损耗片(8)上均设有与极芯(7)相对应的定位槽(111)，磁钢组包括若干个并列设置的永磁体(5)。
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