WO2018149240A1 - 一种音圈马达、摄像模组及移动终端 - Google Patents

一种音圈马达、摄像模组及移动终端 Download PDF

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Publication number
WO2018149240A1
WO2018149240A1 PCT/CN2017/119683 CN2017119683W WO2018149240A1 WO 2018149240 A1 WO2018149240 A1 WO 2018149240A1 CN 2017119683 W CN2017119683 W CN 2017119683W WO 2018149240 A1 WO2018149240 A1 WO 2018149240A1
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WIPO (PCT)
Prior art keywords
mover
voice coil
limiting body
coil motor
base
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PCT/CN2017/119683
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English (en)
French (fr)
Inventor
李文珍
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Publication date
Application filed by Vivo Mobile Communication Co Ltd filed Critical Vivo Mobile Communication Co Ltd
Publication of WO2018149240A1 publication Critical patent/WO2018149240A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a voice coil motor, a camera module, and a mobile terminal.
  • a voice coil motor (Voice Coil Motor) is a device that uses the magnetic field of a magnet to interact with the magnetic poles in a magnetic field generated by an energized coil to produce regular motion. Voice coil motors are commonly used in systems that require precise positioning, such as camera focus, chip packaging, and key switch detection.
  • the voice coil motor In addition to providing sufficient moving distance for the mover, the voice coil motor also needs to ensure that the voice coil motor has a sufficient safety distance under external impact or drop, which makes the overall thickness of the voice coil motor thicker.
  • the camera module of the voice coil motor used in the mobile terminal as an example, in order to make the camera module achieve close-range and distant focus, and prevent the camera module from hitting the sensor chip when impacted or dropped by the external force, the camera module needs to be reserved enough. The lens moves distance and a sufficient safety distance.
  • the overall thickness of the camera module affects the overall appearance and feel of the mobile terminal. It can be seen that how to reduce the overall thickness of the voice coil motor has become an urgent problem to be solved.
  • Embodiments of the present disclosure provide a voice coil motor, a camera module, and a mobile terminal to achieve the purpose of reducing the overall thickness of an existing voice coil motor.
  • an embodiment of the present disclosure provides a voice coil motor including a stator, a mover, and a base.
  • the mover is disposed opposite to the base, and the base or the mover is disposed on the base for limiting a limiting body for moving the distance of the mover, the limiting body is electrically conductive, the limiting body is electrically connected to a power source, and the height of the limiting body in the first electrical connection state is less than the limit The height of the body in the second electrical connection state.
  • an embodiment of the present disclosure further provides a camera module, including a lens, a photosensitive chip, and a voice coil motor, wherein the voice coil motor includes a stator, a mover, and a base, and the lens is clamped to the voice coil.
  • the voice coil motor includes a stator, a mover, and a base, and the lens is clamped to the voice coil.
  • An inner side wall of the mover of the motor, the mover is disposed opposite to the base, and the base or the mover is provided with a limiting body for limiting a moving distance of the mover, the limit body has The height is electrically connected to the power source, and the height of the limiting body in the first electrical connection state is smaller than the height of the limiting body in the second electrical connection state.
  • an embodiment of the present disclosure further provides a mobile terminal, including a camera module, where the camera module includes a lens, a sensor chip, and a voice coil motor, and the voice coil motor includes a stator, a mover, and a base.
  • the lens is clamped to an inner side wall of the mover of the voice coil motor, and the mover is disposed opposite to the base, and the base or the mover is provided with a limit for limiting the moving distance of the mover a bit body, the limiting body is electrically conductive, the limiting body is electrically connected to a power source, and the height of the limiting body in the first electrical connection state is smaller than the second electrical property of the limiting body The height at which the state is connected.
  • a limit body for limiting the moving distance of the mover is disposed in the voice coil motor, and the limit body has a characteristic of different heights in different electrical connection states, so that the mover of the voice coil motor can be made.
  • the working state there is a large moving distance to ensure the normal operation of the voice coil motor; in the non-working state, the mover has a small moving distance, and the voice coil motor is restricted to move when the external force is impacted.
  • the role It can be seen that the embodiments of the present disclosure can achieve the purpose of reducing the overall thickness of the existing voice coil motor.
  • FIG. 1 is a schematic view showing an assembly structure of a voice coil motor according to an embodiment of the present disclosure
  • FIG. 2 is a schematic overall structural diagram of a camera module according to an embodiment of the present disclosure
  • FIG. 3 is a top plan view of a camera module according to an embodiment of the present disclosure.
  • Figure 4 is a cross-sectional view taken along line B-B of the camera module of Figure 3;
  • FIG. 5 is a schematic structural diagram of a carrier of a voice coil motor according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a base of a voice coil motor according to an embodiment of the present disclosure.
  • a voice coil motor 10 includes a stator 1, a mover 2 and a base 3.
  • the mover 2 is disposed opposite to the base 3.
  • the base 3 or the mover 2 is provided with a moving distance for restricting the mover 2.
  • the limiting body 4, the limiting body 4 has electrical conductivity, and the limiting body 4 is electrically connected to a power source.
  • the height of the limiting body 4 in the first electrical connection state is smaller than the limiting body 4 in the second electrical connection. The height of the state.
  • the voice coil motor is a device that uses the interaction between the magnetic field of the magnet and the magnetic pole generated by the energized coil to generate regular motion, wherein one acts as a stator and the other acts as a mover to convert the electrical energy of the voice coil motor to mechanical energy.
  • the stator 1 of the voice coil motor 10 may be a magnet
  • the mover 2 of the voice coil motor 10 may be a coil 21 electrically connected to a power source.
  • the mover 2 may also be composed of a coil 21 and a carrier 22, wherein the coil 21 is embedded in the carrier 22, and the carrier 22 is disposed opposite to the base 3.
  • the carrier 22 and the base 3 are both insulating materials, and may be, for example, an LCP (liquid-crystal polymer) plastic material.
  • the voice coil motor 10 may further include a housing 5, and the stator 1 may be fixedly disposed on the housing 5. Further, the voice coil motor 10 may not be provided with a separate casing 5, but may simultaneously use the stator 1 as a casing of the voice coil motor 10. In general, the voice coil motor 10 needs to be provided with a separate housing 5, which may be made of metal or LCP plastic.
  • the voice coil motor 10 may further include a first elastic piece 6 and a second elastic piece 7 , wherein the first elastic piece 6 may be disposed between the base 3 and the mover 2 , and the second elastic piece 7 may be disposed on Between the mover 2 and the housing 5.
  • the mover 2 can be fixed by the first elastic piece 6 and the second elastic piece 7, and the elastic force of the first elastic piece 6 and the second elastic piece 7 can make the mover 2 move more smoothly, preventing the mover 2 from being deflected when moving in a straight line. shift.
  • Voice coil motors are commonly used in systems that require precise positioning, such as camera focus, chip packaging, and key switch detection.
  • the embodiments of the present disclosure are described by taking a voice coil motor applied to a camera module of a mobile terminal as an example.
  • the camera module of the mobile terminal includes a lens 8 , a sensor chip 9 and a voice coil motor 10 , wherein the lens 8 is clamped on the inner side wall of the mover 2 of the voice coil motor 10 or The lens 8 of the module is clamped to the inner side wall of the carrier 22 of the voice coil motor 10, the coil 21 is embedded in the carrier 22, and the carrier 22 and the coil 21 are used as the mover 2 of the voice coil motor 10, and the lens 8 is driven up and down by the thrust of the magnet. Move to achieve optical focus. In order to achieve close-range and distant focus of the camera module, it is necessary to provide sufficient moving distance for the lens 8.
  • the photosensitive chip 9 of the camera module is disposed under the base 3 of the voice coil motor 10.
  • the lens 8 may move toward the photosensitive chip 9 in order to prevent the lens 8 from striking the photosensitive chip 9
  • the photosensitive chip 9 is broken, and a sufficient safety distance between the lens 8 and the photosensitive chip 9 needs to be retained.
  • the carrier 22 and the base 3 are LCP plastic materials, the carrier 22 collides with the base 3 to easily generate debris, and falls onto the photosensitive chip 9 to cause black packets to be photographed.
  • the impact of the carrier 22 with the base 3 may also cause the carrier 22 or the base 3 to be cracked.
  • the voice coil motor 10 provided with the elastic piece it is also possible to break the elastic piece.
  • the maximum distance between the lens 8 of the camera module and the photosensitive chip 9 is at least the sum of A and B.
  • the moving distance of the mover 2 may be set on the base 3 or on the mover 2.
  • the limiting body 4 is electrically conductive, and the limiting body 4 is electrically connected to a power source.
  • the height of the limiting body 4 in the first electrical connection state is lower than the height of the limiting body 4 in the second electrical connection state.
  • the limiting body 4 may be a shape memory material having conductivity, for example, a shape memory metal or a shape memory polymer having conductivity, wherein the shape memory metal may be a titanium nickel alloy, a copper zinc alloy, or a copper aluminum alloy. Any one of a nickel alloy, a copper molybdenum nickel alloy, and a copper gold zinc alloy.
  • the first electrical connection state may be a state when the limiting body 4 is connected to the power source (or a state when the limiting body 4 is disconnected from the power source), and the second electrical connection state may be the limiting body 4 and the power source.
  • the state at the time of disconnection (or the state when the limiter 4 is connected to the power source) may differ depending on the specific conditions of the different shape memory materials.
  • the height (or volume) of the limiting body 4 when it is connected to the power source may also be related to the magnitude of the internal circulating current. In this way, depending on the specific situation, a power source capable of supplying a corresponding current can be selected.
  • the lens 8 when the camera module is working, that is, when shooting, in order to achieve close-range and distant focus, the lens 8 needs to have sufficient moving distance for focusing, that is, the mover 2 has sufficient moving distance; After the completion of the shooting, in order to prevent the lens 8 from being moved toward the photosensitive chip 9 by the external force, the mover 2 needs to restrict the movement of the mover 2 by the stopper 4. That is to say, when the camera module is working, the height (or volume) of the limiting body 4 needs to be reduced (or become smaller); when the camera module stops working, the height (or volume) of the limiting body 4 needs to be increased. .
  • the first electrical connection state is the state when the limiting body 4 and the power source are turned on
  • the second electrical connection state is the state when the limiting body 4 is disconnected from the power source
  • the first electrical connection state is a state when the limiting body 4 is connected to the power source
  • the second electrical connection state is a state when the limiting body 4 is disconnected from the power source
  • the moving distance of the lens 8 is A
  • the safety distance of the lens 8 is B
  • the safety distance of the lens 8 since the movement of the mover 2 is restricted by the limiter 4, the safety distance of the lens 8 may be less than B.
  • the maximum distance between the lens 8 and the photosensitive chip 9 of the camera module of the embodiment of the present disclosure is smaller than the sum of A and B. If the height (or volume) of the limiting body 4 is increased when the power is disconnected from the power source to limit the moving distance of the mover 2 to zero, then the lens 8 of the camera module of the embodiment of the present disclosure to the photosensitive chip 9 The maximum distance between them can be equal to A. It can be seen that the thickness of the voice coil motor 10 of the embodiment of the present disclosure is effectively reduced.
  • the stopper 4 may be a shape memory material embedded in the injection molding of the base 3 or the carrier 22 by an insert molding process.
  • the electrical connection line of the limiting body 4 and a power source can be disposed inside the base 3 or the carrier 22 by an LDS (Laser Direct Structuring) process.
  • the height (or volume) of the limiting body 4 is changed in different electrical connection states, and the height 2 (or volume) is increased to structurally limit the mover 2 of the voice coil motor 10 .
  • the embodiment of the present disclosure can not only effectively reduce the overall thickness of the voice coil motor 10, but also buffer the instantaneous impact between the carrier 22 and the base 3, and reduce the force of the carrier 22, the base 3 or the elastic piece. And avoiding the carrier 22 colliding with the base 3 to generate debris.
  • the first limiting body 41 is disposed on the mover 2
  • the second limiting body 42 is disposed on the base 3
  • the first limiting body 41 and the second limiting body are disposed.
  • 42 is oppositely disposed, and the first limiting body 41 and the second limiting body 42 are used together to limit the moving distance of the mover 2.
  • the first limiting body 41 may be disposed on the carrier 22.
  • the first limiting body 41 is embedded on the mover 2, and the second limiting body 42 is embedded on the base 3.
  • the first limiting body 41 and the second limiting body 42 can be directly disposed on the surface of the mover 2 and the base 3, and the first limiting body 41 and the second limiting body 42 can be respectively embedded in the mover 2 and the base. 3, that is, one end of the first limiting body 41 is embedded in the mover 2, and one end of the second limiting body 42 is embedded in the base 3. Wherein, the combination of the first limiting body 41 (or the second limiting body 42) and the mover 2 (or the base 3) can be made stronger by the embedded method.
  • the first limiting body 41 includes at least two limiting units respectively disposed on opposite sides of the mover 2
  • the second limiting body 42 includes at least two respectively disposed on The limiting unit on the opposite side of the base 3.
  • the first limiting body 41 is electrically connected to the power source, and the second limiting body 42 is electrically connected to the power supply.
  • a camera module includes a lens 8, a sensor chip 9, and a voice coil motor 10.
  • the voice coil motor 10 includes a stator 1, a mover 2, and a base 3.
  • the mover 2 and the base 3, relative setting, the base 3 or the mover 2 is provided with a limiting body 4 for limiting the moving distance of the mover 2, the limiting body 4 has electrical conductivity, the limiting body 4 is electrically connected with a power source, and the limiting body 4
  • the height in the first electrical connection state is smaller than the height of the limiting body 4 in the second electrical connection state; wherein the lens 8 is clamped to the inner side wall of the mover 2 of the voice coil motor 10.
  • the specific structure of the voice coil motor 10 is the same as that of the first embodiment. To avoid repetition, the embodiments of the present disclosure are not described herein.
  • a mobile terminal includes a camera module and a printed circuit board 11 .
  • the camera module is disposed on the printed circuit board 11 and electrically connected to the printed circuit board 11 , wherein the camera module includes The lens 8, the photosensitive chip 9 and the voice coil motor 10, the voice coil motor 10 includes a stator 1, a mover 2 and a base 3.
  • the mover 2 is disposed opposite to the base 3.
  • the base 3 or the mover 2 is provided with a restricting mover.
  • the limiting body 4 of the moving distance, the limiting body 4 has electrical conductivity, the limiting body 4 is electrically connected to a power source, and the height of the limiting body 4 in the first electrical connection state is smaller than the limiting body 4 in the second The height at the time of electrical connection; the lens 8 is clamped to the inner side wall of the mover 2 of the voice coil motor 10.
  • the specific structure of the voice coil motor 10 is the same as that of the first embodiment. To avoid repetition, the embodiments of the present disclosure are not described herein.
  • the mobile terminal may include any of a mobile phone, a tablet computer, an e-book reader, an MP3 player, an MP4 player, a digital camera, a laptop portable computer, a car computer, a desktop computer, a set top box, a smart TV, and a wearable device.

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Abstract

本公开提供一种音圈马达、摄像模组及移动终端，其中，音圈马达包括定子、动子及底座，所述动子与所述底座相对设置，所述底座上或所述动子上设置有用于限制所述动子移动距离的限位体，所述限位体具有导电性，所述限位体与一电源电性连接，所述限位体在第一电性连接状态时的高度小于所述限位体在第二电性连接状态时的高度。

Description

一种音圈马达、摄像模组及移动终端
相关申请的交叉引用
本申请主张在2017年2月14日在中国提交的中国专利申请号No.201710079154.8的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种音圈马达、摄像模组及移动终端。
背景技术
音圈马达(Voice Coil Motor)是利用磁石的磁场与通电线圈产生的磁场中磁极间的相互作用产生有规律运动的装置。音圈马达普遍应用于需要精密定位的系统中，例如摄像头的对焦，芯片的封装，按键开关的检测等等。
音圈马达除了需要为动子提供足够的移动距离，还需要确保音圈马达在外力冲击或跌落等情况下具有足够的安全距离，这使得音圈马达的整体厚度较厚。以音圈马达使用于移动终端的摄像模组为例，为了使摄像模组实现近景和远景对焦，并防止摄像模组在受到外力冲击或跌落时镜头撞击感光芯片，摄像模组需要预留足够的镜头移动距离及足够的安全距离。
当前，随着移动终端的整机厚度越来越薄，摄像模组的整体厚度会影响到移动终端的整体外观及手感。可见，如何降低音圈马达的整体厚度成为亟待解决的问题。
发明内容
本公开实施例提供一种音圈马达、摄像模组及移动终端，以实现降低现有音圈马达整体厚度的目的。
第一方面，本公开实施例提供了一种音圈马达，包括定子、动子及底座，所述动子与所述底座相对设置，所述底座上或所述动子上设置有用于限制所述动子移动距离的限位体，所述限位体具有导电性，所述限位体与一电源电性连接，所述限位体在第一电性连接状态时的高度小于所述限位体在第二电性连接 状态时的高度。
第二方面，本公开实施例还提供了一种摄像模组，包括镜头、感光芯片及音圈马达，所述音圈马达包括定子、动子及底座，所述镜头夹持于所述音圈马达的动子的内侧壁，所述动子与所述底座相对设置，所述底座上或所述动子上设置有用于限制所述动子移动距离的限位体，所述限位体具有导电性，所述限位体与一电源电性连接，所述限位体在第一电性连接状态时的高度小于所述限位体在第二电性连接状态时的高度。
第三方面，本公开实施例还提供了一种移动终端，包括摄像模组，所述摄像模组包括镜头、感光芯片及音圈马达，所述音圈马达包括定子、动子及底座，所述镜头夹持于所述音圈马达的动子的内侧壁，所述动子与所述底座相对设置，所述底座上或所述动子上设置有用于限制所述动子移动距离的限位体，所述限位体具有导电性，所述限位体与一电源电性连接，所述限位体在第一电性连接状态时的高度小于所述限位体在第二电性连接状态时的高度。
本公开实施例中，在音圈马达中设置限制动子移动距离的限位体，该限位体具有在不同的电性连接状态下高度不同的特性，这样，可以使音圈马达的动子在工作状态下具有较大的移动距离，以确保音圈马达的正常工作；而在非工作状态下使动子具有较小的移动距离，在音圈马达受到外力冲击时起到限制动子移动的作用。可见，本公开实施例可以实现降低现有音圈马达整体厚度的目的。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获取其他的附图。
图1是本公开实施例提供的音圈马达的装配结构示意图；
图2是本公开实施例提供的摄像模组的整体结构示意图；
图3是本公开实施例提供的摄像模组的俯视图；
图4是图3中摄像模组的B-B向剖视图；
图5是本公开实施例提供的音圈马达的载体的结构示意图；及
图6是本公开实施例提供的音圈马达的底座的结构示意图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获取的所有其他实施例，都属于本公开保护的范围。
第一实施例
如图1所示，一种音圈马达10，包括定子1、动子2及底座3，动子2与底座3相对设置，底座3上或动子2上设置有用于限制动子2移动距离的限位体4，限位体4具有导电性，限位体4与一电源电性连接，限位体4在第一电性连接状态时的高度小于限位体4在第二电性连接状态时的高度。
音圈马达是利用磁石的磁场与通电线圈产生的磁场中磁极间的相互作用产生有规律运动的装置，其中，一个作为定子，另一个作为动子以实现音圈马达的电能向机械能的转换。
其中，如图1所示，音圈马达10的定子1可以是磁石，音圈马达10的动子2可以是与一电源电性连接的线圈21。此外，动子2还可以是由线圈21及载体22共同组成，其中，线圈21嵌于载体22中，载体22与底座3相对设置。载体22与底座3均为绝缘材料，例如可以是LCP(liquid-crystal polymer，液晶聚合物)塑胶材料。
此外，如图1所示，音圈马达10还可以包括壳体5，定子1可以固定设置于壳体5上。此外，音圈马达10也可以不设置单独的壳体5，而是将定子1同时作为音圈马达10的壳体。一般而言，音圈马达10需要设置单独的壳体5，壳体5的材料可以是金属或者LCP塑胶等材料。
此外，如图1所示，音圈马达10还可以包括第一弹片6及第二弹片7，其中，第一弹片6可以设置于底座3与动子2之间，第二弹片7可以设置于动子2与壳体5之间。这样，动子2可以被第一弹片6及第二弹片7固定，并通过第一弹片6及第二弹片7的弹力使动子2移动时更加平稳，防止动子2在直 线移动时产生偏移。
音圈马达普遍应用于需要精密定位的系统中，例如摄像头的对焦，芯片的封装，按键开关的检测等等。为了便于理解，本公开实施例均以音圈马达应用于移动终端的摄像模组为例进行说明。
如图2至图4所示，移动终端的摄像模组包括镜头8、感光芯片9及音圈马达10，其中，镜头8夹持于音圈马达10的动子2的内侧壁，或者，摄像模组的镜头8夹持于音圈马达10的载体22的内侧壁，线圈21嵌于载体22中，载体22和线圈21作为音圈马达10的动子2，通过磁石的推力带动镜头8上下移动，以实现光学对焦。为了使摄像模组实现近景和远景对焦，需要为镜头8提供足够的移动距离。
摄像模组的感光芯片9设置于音圈马达10的底座3的下方，摄像模组在自然状态下受外力冲击时，镜头8可能会朝感光芯片9方向移动，为了防止镜头8撞击感光芯片9导致感光芯片9破裂，镜头8与感光芯片9之间需要保留足够的安全距离。
此外，在可靠性跌落实验时，若载体22和底座3为LCP塑胶材料，载体22与底座3撞击容易产生碎屑，并掉落到感光芯片9上导致拍照产生黑团。载体22与底座3的撞击还有可能使载体22或者底座3开裂，对于设置有弹片的音圈马达10，还有可能使得弹片断裂。
若镜头8的移动距离为A，镜头8的安全距离为B，则摄像模组的镜头8至感光芯片9之间的最大距离至少为A与B之和。
本公开实施例中，为了降低镜头8至感光芯片9之间的最大距离，或者说为了降低音圈马达10的厚度，可以在底座3上或动子2上设置用于限制动子2移动距离的限位体4，若动子2包括线圈21及载体22，则限位体4可以设置于底座3或载体22上。该限位体4具有导电性，限位体4与一电源电性连接，限位体4在第一电性连接状态时的高度小于限位体4在第二电性连接状态时的高度。
其中，限位体4可以是具有导电性的形状记忆材料，例如，可以是形状记忆金属或具有导电性的形状记忆聚合物，其中，形状记忆金属可以为钛镍合金、铜锌合金、铜铝镍合金、铜钼镍合金及铜金锌合金中的任意一种。
其中，第一电性连接状态可以是限位体4与电源接通时的状态(或限位体4与电源断开时的状态)，第二电性连接状态可以是限位体4与电源断开时的状态(或限位体4与电源接通时的状态)，不同的形状记忆材料对应的具体情况可能有所区别。此外，限位体4在与电源接通时的高度(或体积)可能还与内部流通电流的大小有关。这样，可以根据具体情况，选择能提供相应电流大小的电源。
以摄像模组为例，摄像模组工作时，即拍摄时，为了实现近景及远景的对焦，镜头8需要有足够的移动距离用于对焦，也就是说动子2要有足够的移动距离；而拍摄完成之后，为了防止镜头8受外力冲击而向感光芯片9方向移动，动子2需要由限位体4来限制动子2的移动。也就是说，在摄像模组工作时，限位体4的高度(或体积)需要降低(或变小)；在摄像模组停止工作时，限位体4的高度(或体积)需要增大。
对于第一电性连接状态为限位体4与电源接通时的状态，第二电性连接状态为限位体4与电源断开时的状态的情况而言，在摄像模组工作时，需要使限位体4接通电源；在摄像模组停止工作时，需要使限位体4断开电源。对于相反的情况，则在摄像模组工作时，需要使限位体4断开电源；在摄像模组停止工作时，需要使限位体4接通电源。
可选的，第一电性连接状态为限位体4与电源接通时的状态，第二电性连接状态为限位体4与电源断开时的状态。
若现有摄像模组中，镜头8的移动距离为A，镜头8的安全距离为B。则本公开实施例中，由于用限位体4对动子2的移动进行限制，镜头8的安全距离可以小于B。这样，本公开实施例的摄像模组的镜头8至感光芯片9之间的最大距离小于A与B之和。若限位体4在与电源断开时，其高度(或体积)可以增大到使动子2的移动距离限制为零，那么本公开实施例的摄像模组的镜头8至感光芯片9之间的最大距离可以等于A。可见，本公开实施例的音圈马达10的厚度得到有效降低。
此外，限位体4可以是通过嵌入成型(insert molding)工艺，在底座3或载体22注塑成型时嵌入形状记忆材料。限位体4与一电源的电性连接线路可以通过LDS(Laser Direct Structuring，激光直接成型技术)工艺设置于底座3 或载体22内部。
本公开实施例中，利用限位体4在不同的电性连接状态下高度(或体积)的变化，使其高度(或体积)增大时对音圈马达10的动子2进行结构限位，以降低镜头8到感光芯片9的距离。可见，本公开实施例不仅能使音圈马达10的整体厚度得到有效降低，还能对载体22与底座3之间的瞬间撞击起到缓冲作用，减小载体22、底座3或弹片的受力，并避免载体22与底座3撞击产生碎屑。
可选的，如图5至图6所示，动子2上设置有第一限位体41，底座3上设置有第二限位体42，第一限位体41与第二限位体42相对设置，第一限位体41与第二限位体42共同用于限制动子2的移动距离。
其中，如图5所示，当动子2包括线圈21和载体22时，第一限位体41可以设置于载体22上。
可选的，第一限位体41嵌于动子2上，第二限位体42嵌于底座3上。
第一限位体41及第二限位体42除了可以直接设置于动子2及底座3表面，还可以使第一限位体41及第二限位体42分别嵌于动子2及底座3上，即第一限位体41的一端嵌入动子2内，第二限位体42的一端嵌入底座3内。其中，采用嵌入的方式，可以使第一限位体41(或第二限位体42)与动子2(或底座3)的结合更加牢固。
可选的，如图5至图6所示，第一限位体41包括至少两个分别设置于动子2两相对侧的限位单元，第二限位体42包括至少两个分别设置于底座3两相对侧的限位单元。
这样，可以使整个音圈马达10的动子2与底座3之间的作用力更加均衡。
可选的，第一限位体41与电源电性连接的线路设置于动子2内部，第二限位体42与电源电性连接的线路设置于底座3内部。
第二实施例
如图2至图4所示，一种摄像模组，包括镜头8、感光芯片9及音圈马达10，其中，音圈马达10包括定子1、动子2及底座3，动子2与底座3相对设置，底座3上或动子2上设置有用于限制动子2移动距离的限位体4，限位体4具有导电性，限位体4与一电源电性连接，限位体4在第一电性连接状态时 的高度小于限位体4在第二电性连接状态时的高度；其中，镜头8夹持于音圈马达10的动子2的内侧壁。
音圈马达10的具体结构均与第一实施例相同，为避免重复，本公开实施例不作赘述。
第三实施例
如图2至图4所示，一种移动终端，包括摄像模组及印刷电路板11，摄像模组设置于印刷电路板11上并与印刷电路板11电性连接，其中，摄像模组包括镜头8、感光芯片9及音圈马达10，音圈马达10包括定子1、动子2及底座3，动子2与底座3相对设置，底座3上或动子2上设置有用于限制动子2移动距离的限位体4，限位体4具有导电性，限位体4与一电源电性连接，限位体4在第一电性连接状态时的高度小于限位体4在第二电性连接状态时的高度；镜头8夹持于音圈马达10的动子2的内侧壁。
音圈马达10的具体结构均与第一实施例相同，为避免重复，本公开实施例不作赘述。
移动终端可以包括：手机、平板电脑、电子书阅读器、MP3播放器、MP4播放器、数码相机、膝上型便携计算机、车载电脑、台式计算机、机顶盒、智能电视机、可穿戴设备中的任意一项。
以上，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以权利要求的保护范围为准。

Claims (10)

  1. 一种音圈马达，包括定子、动子及底座，所述动子与所述底座相对设置，其中，所述底座上或所述动子上设置有用于限制所述动子移动距离的限位体，所述限位体具有导电性，所述限位体与一电源电性连接，所述限位体在第一电性连接状态时的高度小于所述限位体在第二电性连接状态时的高度。
  2. 根据权利要求1所述的音圈马达，其中，所述第一电性连接状态为所述限位体与电源接通时的状态，所述第二电性连接状态为所述限位体与电源断开时的状态。
  3. 根据权利要求1或2所述的音圈马达，其中，所述动子上设置有第一限位体，所述底座上设置有第二限位体，所述第一限位体与所述第二限位体相对设置，所述第一限位体与所述第二限位体共同用于限制所述动子的移动距离。
  4. 根据权利要求3所述的音圈马达，其中，所述第一限位体嵌于所述动子上，所述第二限位体嵌于所述底座上。
  5. 根据权利要求3所述的音圈马达，其中，所述第一限位体包括至少两个分别设置于所述动子两相对侧的限位单元，所述第二限位体包括至少两个分别设置于所述底座两相对侧的限位单元。
  6. 根据权利要求1或2所述的音圈马达，其中，所述限位体由具有导电性的形状记忆材料制成。
  7. 根据权利要求1或2所述的音圈马达，其中，所述音圈马达还包括壳体、第一弹片及第二弹片，所述定子固定设置于所述壳体上，所述第一弹片设置于所述底座与所述动子之间，所述第二弹片设置于所述动子与所述壳体之间。
  8. 根据权利要求1或2所述的音圈马达，其中，所述定子为磁石，所述动子包括线圈及载体，所述线圈嵌于所述载体中，所述载体与所述底座相对设置。
  9. 一种摄像模组，包括镜头、感光芯片及如权利要求1至8中任一项所述的音圈马达，所述镜头夹持于所述音圈马达的动子的内侧壁。
  10. 一种移动终端，包括如权利要求9所述的摄像模组。
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