WO2022000547A1 - 镜头驱动装置 - Google Patents

镜头驱动装置 Download PDF

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Publication number
WO2022000547A1
WO2022000547A1 PCT/CN2020/101495 CN2020101495W WO2022000547A1 WO 2022000547 A1 WO2022000547 A1 WO 2022000547A1 CN 2020101495 W CN2020101495 W CN 2020101495W WO 2022000547 A1 WO2022000547 A1 WO 2022000547A1
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WO
WIPO (PCT)
Prior art keywords
lens
lens barrel
driving
housing
piezoelectric
Prior art date
Application number
PCT/CN2020/101495
Other languages
English (en)
French (fr)
Inventor
王洪兴
史卫领
郭顺
Original Assignee
诚瑞光学(常州)股份有限公司
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Filing date
Publication date
Application filed by 诚瑞光学(常州)股份有限公司 filed Critical 诚瑞光学(常州)股份有限公司
Publication of WO2022000547A1 publication Critical patent/WO2022000547A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/06—Swinging lens about normal to the optical axis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/08—Swing backs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules

Definitions

  • the utility model relates to the technical field of imaging equipment, in particular to a lens driving device.
  • a camera module includes a lens, an autofocus device, an image sensor (eg, CMOS and CCD), etc., wherein the autofocus device adjusts the focus by moving the optical system relative to the optical axis, and the image sensor is used to convert the optical signal into electrical Signal.
  • CMOS and CCD complementary metal-oxide-semiconductor
  • the camera module When a user takes an image or video, if the body or hand shakes, the obtained image may be blurred. Therefore, usually the camera module also includes an optical image stabilization device, also called an OIS device (Optical Image Stabilization, Optical Image Stabilization).
  • OIS device Optical Image Stabilization, Optical Image Stabilization
  • the existing optical anti-shake device can only achieve anti-shake in a certain direction of the lens, and the anti-shake effect is not good. Therefore, how to realize a better anti-shake design of the lens is a hot topic being studied by those skilled in the art subject.
  • the purpose of the utility model is to provide a lens driving device which can realize the shake compensation of the yaw, pitch and roll directions of the lens.
  • the technical solution of the present utility model is as follows:
  • the present utility model provides a lens driving device, and the lens driving device includes:
  • the lens barrel that houses the lens
  • the casing includes a receiving cavity, the lens barrel is installed in the receiving cavity, and the lens barrel and the casing are rotatably connected;
  • a piezoelectric driving member that drives the lens barrel to rotate around the optical axis of the lens, the piezoelectric driving member is arranged in the receiving cavity and is located between the housing and the lens barrel, the piezoelectric driving member is The side of the driving member facing the housing is connected with the housing, and the side of the piezoelectric driving member facing the lens barrel is connected with the lens barrel;
  • a second drive assembly that drives the lens barrel to deflect in a direction perpendicular to the optical axis of the lens, the second drive assembly is disposed between the casing and the lens barrel and is connected to the casing and the lens barrel.
  • the lens barrel is connected.
  • the piezoelectric driver includes at least two and is arranged around the peripheral side of the lens barrel;
  • the lens driving device includes a ring around the lens barrel and is connected to the piezoelectric driver and the lens barrel
  • the first fixing block and the second fixing block which is spaced from the first fixing block and connected to the piezoelectric driving element and the housing.
  • the extension direction of the piezoelectric driving member is perpendicular to the optical axis of the lens.
  • the first fixing block and the second fixing block are respectively connected to opposite ends of the piezoelectric driving member along the extending direction thereof.
  • the piezoelectric driving member includes at least two piezoelectric layers stacked in sequence.
  • the first fixing block and the lens barrel are integrally formed or separately assembled; the second fixing block and the housing are integrally formed or separately assembled.
  • the housing comprises a bottom plate, a side plate extending from the periphery of the bottom plate, and a cover plate connected with the side plate and spaced from the bottom plate; the bottom plate, the side plate and the cover plate The accommodating cavity is enclosed and formed, and the cover plate is provided with an opening passing through the cover plate corresponding to the position of the lens barrel; the lens driving device further includes a fulcrum arranged between the lens barrel and the bottom plate structure.
  • the fulcrum structure includes a sphere and a boss, the boss is provided with a groove matching with the sphere, one of the sphere and the boss is connected to the bottom plate, the sphere and the boss are The other part of the stage is connected with the lens barrel, and the sphere is at least partially located in the groove and is rotatably connected with the groove.
  • the second driving assembly includes a driving coil and a magnetic member disposed opposite to each other, one of the driving coil and the magnetic member is connected to the lens barrel, and the other is connected to the housing, the first The two driving components and the piezoelectric driving member are arranged at intervals along the direction parallel to the optical axis of the lens.
  • the lens barrel includes an outer sidewall spaced apart from the housing, the second driving assembly includes a plurality of second driving assemblies, and the plurality of second driving assemblies are spaced apart around the outer sidewall, each of the first The planes on which the driving coils and the magnetic parts of the two driving assemblies are located are both parallel to the outer side walls.
  • the lens driving device further includes an elastic component for elastically supporting the lens barrel, the elastic component includes a first connecting portion connected with the lens barrel, a second connecting portion connected with the housing, and a set of An elastic piece between the first connecting portion and the second connecting portion and elastically connecting the first connecting portion and the second connecting portion.
  • the side of the piezoelectric driver facing the housing is connected to the housing, the side of the piezoelectric driver facing the lens barrel is connected to the lens barrel, and the piezoelectric driver is extended and/or shortened under the condition of electrification to generate the driving lens barrel winding.
  • the driving force of the rotation of the optical axis of the lens so as to realize the shake compensation of the lens in the rolling direction.
  • the second driving component drives the lens barrel to deflect around a direction perpendicular to the optical axis of the lens to realize the shake compensation of the lens in the pitch and yaw directions.
  • FIG. 1 is a schematic three-dimensional structure diagram of a lens driving device provided by an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a partial exploded structure of a lens driving device provided by an embodiment of the present invention
  • Fig. 3 is the sectional structure schematic diagram along the A-A direction in Fig. 1;
  • FIG. 4 is a schematic three-dimensional structural diagram of a piezoelectric driving component in cooperation with a lens barrel according to an embodiment of the lens driving device;
  • FIG. 5 is a schematic diagram of the deflection of the lens barrel under the action of the piezoelectric drive assembly
  • Fig. 6 is the schematic diagram that the lens barrel is deflected clockwise around the optical axis under the action of two piezoelectric layers;
  • Fig. 7 is the schematic diagram that the lens barrel is deflected counterclockwise around the optical axis under the action of two piezoelectric layers;
  • Fig. 8 is the exploded structure schematic diagram of the second drive assembly of the lens drive device
  • FIG. 9 is a schematic diagram of the lens barrel deflecting in one direction under the action of the driving coil and the magnetic member;
  • FIG. 10 is a schematic diagram of the lens barrel deflecting in another direction under the action of the driving coil and the magnetic member;
  • FIG. 11 is a schematic three-dimensional structural diagram of an elastic component provided by an embodiment of the present invention.
  • an embodiment of the present utility model provides a lens driving device 1, the lens driving device 1 is used to drive the lens, so that the lens realizes the anti-shake of the shake compensation in the yaw, pitch and roll directions;
  • the yaw refers to the rotation of the lens barrel 20 around the Y axis
  • the pitch refers to the rotation of the lens barrel 20 around the X axis
  • the roll direction refers to the rotation of the lens barrel 20 around the Z axis.
  • the direction of the Z axis is also the direction parallel to the optical axis direction of the lens.
  • the lens driving device 1 includes a housing 10 , a lens barrel 20 , a driving component 30 , an elastic component 40 , and a fulcrum structure 50 .
  • the lens barrel 20 , the driving component 30 , the elastic component 40 , and the fulcrum structure 50 are installed in the housing 10 , wherein the lens barrel 20 is used to accommodate the lens, and the lens barrel 20 is rotatably connected to the housing 10 through the fulcrum structure 50 , and the elastic component 40 It is respectively connected with the housing 10 and the lens barrel 20 to support the lens barrel 20 and provide restoring force for the lens barrel after the lens barrel completes the jitter compensation in the yaw, pitch and rolling directions, and the driving assembly 30 is used for driving the lens barrel 20 relative to the shell.
  • Body 10 implements shake compensation in yaw, pitch and roll directions.
  • the housing 10 includes a bottom plate 11, a side plate 12 extending from the periphery of the bottom plate 11, and a cover plate 13 connected to the side plate 12 and spaced from the bottom plate 11; wherein the bottom plate 11, the side plate 12 and the cover The plate 13 surrounds a receiving cavity 14 .
  • the cover plate 13 is provided with an opening 131 penetrating the cover plate 13 at the position corresponding to the lens barrel 20 .
  • the side plate 12 and the bottom plate 11 are vertical.
  • the cover plate 13 and the bottom plate 11 are parallel.
  • the side panels 12 include four.
  • the shape of the lens barrel 20 matches the shape of the lens.
  • the material of the lens barrel 20 is not limited, for example, it can be plastic.
  • the lens barrel 20 includes a bottom wall 21 on a side away from the opening 131 and an outer side wall 22 extending from the bottom wall 21 toward the opening 131 and spaced from the housing 10 .
  • the bottom wall 21 and the outer side wall 22 are vertical. In this application, there are four outer side walls 22, and two adjacent outer side walls 22 are perpendicular to each other.
  • the fulcrum structure 50 is located in the receiving cavity 14.
  • the fulcrum structure 50 is respectively connected with the bottom plate 11 and the bottom wall 21 of the lens barrel 20.
  • the lens barrel 20 can rotate relative to the housing 10 through the fulcrum structure 50.
  • the fulcrum structure 50 is disposed between the lens barrel 20 and the bottom plate 11 , and the fulcrum structure 50 includes a sphere 51 and a boss 52 .
  • the boss 52 is provided with a groove 521 that cooperates with the sphere 51 .
  • the sphere 51 is at least partially located in the groove 521 and is rotatably connected to the groove 521; by setting the fulcrum structure 50, the lens barrel 20 is relative to the housing 10. When rotating, the force is more stable and the rotation accuracy is better.
  • the sphere 51 is connected to the bottom wall 21 of the lens barrel 20 ; the boss 52 is connected to the bottom plate 11 .
  • the fulcrum structure 50 further includes a connecting plate 53 , and the sphere 51 is connected to the bottom wall 21 of the lens barrel 20 through the connecting plate 53 .
  • the connecting plate 53 and the boss 52 are integrally formed.
  • the elastic components 40 are respectively connected with the outer side wall 22 of the lens barrel 20 and the side plate 12 of the housing 10 .
  • the elastic components 40 are used to support the lens barrel 20 and provide restoring force for the lens barrel 20 .
  • the lens driving device 1 further includes a power supply board 60 .
  • the power supply board 60 is electrically connected to the driving component 30 , and the driving component 30 is powered by the power supply board 60 .
  • the power supply board 60 may be a flexible circuit board.
  • the driving component 30 includes a piezoelectric driving component 31 and a second driving component 32 ; the piezoelectric driving component 31 is disposed in the receiving cavity 14 , and the piezoelectric driving component 31 is respectively connected with the housing 10 and the lens barrel 20 , and the pressure
  • the electric drive member 31 is used to drive the lens barrel 20 to rotate around the optical axis of the lens (the direction of the optical axis is the L direction in FIG.
  • the second drive The assembly 32 is arranged in the accommodating cavity 14, and the second driving assembly 32 is connected with the housing 10 and the lens barrel 20 respectively, and is used to drive the lens barrel 20 to take the rotational connection between the lens barrel 20 and the housing 10 as a fulcrum, along a direction perpendicular to the lens.
  • the direction of the optical axis is deflected to realize shake compensation of the lens barrel 20 in the yaw and pitch directions.
  • the side of the piezoelectric driving member 31 facing the housing 10 is connected to the housing 10
  • the side of the piezoelectric driving member 31 facing the lens barrel 20 is connected to the lens barrel 20 .
  • the piezoelectric driving member 31 is energized, the piezoelectric driving member 31 is deformed to generate a first driving force for driving the lens barrel 20 to rotate in the rolling direction.
  • the piezoelectric driving member 31 can be, but is not limited to, a piezoelectrically driven cantilever beam, and the piezoelectrically driven cantilever beam can be deformed and generate the above-mentioned first driving force after being powered on.
  • the piezoelectric driver 31 includes at least two and is arranged around the lens barrel 20;
  • the first fixing block 71 and the second fixing block 72 which are spaced from the first fixing block 71 and connect the piezoelectric driving member 31 and the housing 10;
  • the piezoelectric driving member 31 adopts a piezoelectric sheet 311, and the piezoelectric sheet 311 may be a stack including at least one piezoelectric layer stacked in sequence Structure, after the piezoelectric sheet 311 is energized, it stretches and/or contracts to generate the above-mentioned first driving force, and the first driving force is used to drive the lens barrel 20 to rotate in the rolling direction in the receiving cavity 14, so as to realize the rotation of the lens barrel 20 in the rolling direction.
  • Shake compensation in the scroll direction That is to say, when the lens barrel 20 and the lens are rotated around the optical axis under external influence, the piezoelectric sheet 311 is extended and/or contracted after being energized to generate a first driving force, so as to drive the lens barrel 20 to revolve around the accommodating cavity 14 .
  • the optical axis rotates in the opposite direction, thereby realizing anti-shake of the lens barrel 20 through compensation.
  • the extension direction of the piezoelectric driving member 31 is perpendicular to the optical axis of the lens; the first fixing block 71 and the second fixing block 72 are respectively connected to opposite ends of the piezoelectric driving member 31 along the extending direction thereof; 71 and the lens barrel 20 are integrally formed or separately assembled, and the second fixing block 72 is integrally formed or separately assembled with the housing.
  • one end of the first fixing block 71 is connected to the side of the piezoelectric sheet 311 facing the side plate 12
  • the other end of the first fixing block 71 is connected to the side plate 12
  • one end of the second fixing block 72 is connected to the piezoelectric sheet 311 is connected to the side facing the outer side wall 22
  • the other end of the second fixing block 72 is connected to the outer side wall 22
  • the first fixing block 71 and the second fixing block 72 are arranged at intervals along the extension direction of the piezoelectric sheet 311.
  • the block 71 , the second fixing block 72 and the piezoelectric sheet 311 are in a “Z” shape; it can be understood that the first fixing block 71 can be integrally formed with the housing 10 , and the second fixing block 72 can be integrally formed with the lens barrel 20 .
  • the piezoelectric sheet 311 of the piezoelectric driving member 31 includes only one piezoelectric layer.
  • the piezoelectric sheet 311 contracts when energized, the piezoelectric sheet generates a first counterclockwise rotation of the driving lens barrel 20 around the optical axis.
  • a driving force realizes the counterclockwise rotation of the lens barrel 20 around the optical axis.
  • the piezoelectric sheet 311 is extended when energized, the piezoelectric sheet generates a first driving force that drives the lens barrel 20 to rotate clockwise around the optical axis, so that the lens barrel 20 rotates clockwise around the optical axis.
  • the piezoelectric sheet 311 of the piezoelectric driving member 31 may also be a first piezoelectric layer 301 and a second piezoelectric layer 302 stacked in sequence, and the first piezoelectric layer 301 faces the side plate 12.
  • One end of the first piezoelectric layer 301 is connected to the first fixing block 71, and the first piezoelectric layer 301 is connected to the side plate 12 through the first fixing block 71;
  • An end of the piezoelectric layer 302 away from one end of the first piezoelectric layer 301 is connected to the second fixing block 72 , and the second piezoelectric layer 302 is connected to the outer side wall 22 through the second fixing block 72 .
  • the first energization condition of the first piezoelectric layer 301 and the second piezoelectric layer 302 the first piezoelectric layer 301 stretches after being energized, the second piezoelectric layer 302 contracts after being energized, and the piezoelectric driving member 31 generates a driving lens barrel.
  • the driving force of 20 rotating clockwise around the Z axis is used to drive the lens barrel 20 to realize shake compensation in the rolling direction.
  • the second energization condition of the first piezoelectric layer 301 and the second piezoelectric layer 302 the first piezoelectric layer 301 shrinks after being energized, the second piezoelectric layer 302 stretches after being energized, and the piezoelectric driving element 31 generates a driving force for driving the lens barrel 20 to rotate counterclockwise around the Z axis, for driving the lens barrel 20 to realize shake compensation in the rolling direction.
  • FIGS. 8-10 there are multiple second driving assemblies 32 , a plurality of second driving assemblies 32 are disposed between the casing 10 and the lens barrel 20 and are connected with the casing 10 and the lens barrel 20 , and a plurality of first The two driving assemblies 32 are arranged at intervals around the outer side wall 22 , and the planes where the driving coil 321 and the magnetic member 322 of each second driving assembly 32 are located are parallel to the corresponding outer side wall 22 .
  • each second driving component 32 includes a driving coil 321 . and a magnetic member 322, any one of the driving coil 321 and the magnetic member 322 is mounted to the side plate 12 of the housing 10, and the other is mounted to an outer side wall 22 of the lens barrel 20; wherein, one side of the housing 10
  • the plate 12 is arranged opposite to an outer side wall 22 of the lens barrel 20; for example, the driving coil 321 is installed on the outer side wall 22 of the lens barrel 20, the magnetic member 322 is installed on the side plate 12 of the housing 10, or the driving coil 321 is installed on the On the side plate 12 of the housing 10, the magnetic member 322 is installed on the outer side wall 22 of the lens barrel 20, and it only needs to satisfy the requirement that a second driving force can be generated between the plurality of driving coils 321 and the plurality of magnetic members 322, which is used to drive the lens barrel.
  • the lens driving device can be 1. Due to external influence, when the whole body rotates in the pitch or yaw direction, by energizing the driving coil 321, a second driving force is generated between the energized driving coil 321 and the corresponding magnetic member 322, so as to drive the lens barrel 20 in the housing.
  • the junction of the lens barrel 20 and the housing 10 is used as a fulcrum to deflect around the direction perpendicular to the optical axis, so as to realize the shake compensation of the lens barrel 20 in the yaw and pitch directions.
  • the magnetic member 322 is a magnet, a magnetic steel or a soft magnetic member.
  • the lens driving device 1 further includes an elastic component 40 for elastically supporting the lens barrel 20
  • the elastic component 40 includes a first connecting portion 41 connected with the lens barrel 20 , a second connecting portion 42 connected with the housing 10 , and a The elastic member 43 between the first connecting portion 41 and the second connecting portion 42 and elastically connecting the first connecting portion 41 and the second connecting portion 42;
  • the elastic member 43 deforms to generate a restoring force.
  • the driving assembly 30 is powered off, the restoring force of the elastic member 43 is used to drive the lens barrel 20 to reset.
  • the piezoelectric driving element 31 extends and/or shortens under the condition of electrification to generate a driving force for driving the lens barrel 20 to rotate around the optical axis of the lens, thereby realizing the shake compensation of the lens in the rolling direction.
  • the second driving component 32 drives the lens barrel 20 to deflect in a direction perpendicular to the optical axis of the lens to realize the shake compensation of the lens in the pitch and yaw directions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Adjustment Of Camera Lenses (AREA)

Abstract

本实用新型涉及摄像设备技术领域，尤其涉及一种镜头驱动装置，所述镜头驱动装置包括：收容镜头的镜筒、壳体、驱动所述镜筒绕所述镜头的光轴旋转的压电驱动件及驱动所述镜筒绕垂直于所述镜头的光轴的方向偏转的第二驱动组件，所述壳体包括收容腔，所述镜筒安装在所述收容腔内，所述镜筒和所述壳体可转动连接；所述压电驱动件设置于所述收容腔内并位于所述壳体和所述镜筒之间，所述压电驱动件朝向所述壳体的一面与所述壳体连接，所述压电驱动件朝向所述镜筒的一面与所述镜筒连接。本实用新型提供的镜头驱动装置，实现镜头在偏摆、俯仰和滚动方向的抖动补偿。

Description

镜头驱动装置 技术领域
本实用新型涉及摄像设备技术领域，尤其涉及一种镜头驱动装置。
 背景技术
近来，随着电子产品的高性能化和小型化的发展，摄像模块已被普遍应用到诸如便携式电话、笔记本和平板PC等的移动装置。通常，摄像模块包括镜头、自动聚焦装置、图像传感器(如，COMS和CCD )等，其中，自动聚焦装置通过使光学系统相对于光轴运动来调节焦点，图像传感器用于将光信号转换为电信号。
用户在拍摄图像或视频时，若身体或手部抖动有可能会造成获取到的图像模糊，故，通常摄像模块还包括光学防抖装置，也称OIS装置(Optical Image Stabilization，光学防抖 )。
 技术问题
然而，现有的光学防抖装置仅能在镜头的某个方向上实现防抖，防抖效果不佳，因此，如何实现镜头更优的防抖设计，是本领域技术人员正在研究的一个热门课题。
 技术解决方案
本实用新型的目的在于提供一种能使镜头实现偏摆、俯仰和滚动方向的抖动补偿的镜头驱动装置。
本实用新型的技术方案如下：本实用新型提供了一种镜头驱动装置，所述镜头驱动装置包括：
收容镜头的镜筒；
壳体，所述壳体包括收容腔，所述镜筒安装在所述收容腔内，所述镜筒和所述壳体可转动连接；
驱动所述镜筒绕所述镜头的光轴旋转的压电驱动件，所述压电驱动件设置于所述收容腔内并位于所述壳体和所述镜筒之间，所述压电驱动件朝向所述壳体的一面与所述壳体连接，所述压电驱动件朝向所述镜筒的一面与所述镜筒连接；及
驱动所述镜筒绕垂直于所述镜头的光轴的方向偏转的第二驱动组件，所述第二驱动组件设置于所述壳体和所述镜筒之间且与所述壳体和所述镜筒相连接。
优选地，所述压电驱动件包括至少两个且环设于所述镜筒周侧；所述镜头驱动装置包括环设于所述镜筒并连接所述压电驱动件与所述镜筒的第一固定块以及与所述第一固定块间隔设置并连接所述压电驱动件与所述壳体的第二固定块。
优选地，所述压电驱动件的延伸方向垂直于所述镜头的光轴。
优选地，所述第一固定块与所述第二固定块分别连接于所述压电驱动件沿其延伸方向的相对两端。
优选地，所述压电驱动件包括至少两个依次叠设的压电层。
优选地，所述第一固定块与所述镜筒一体成型或者分体组装成型；所述第二固定块与所述壳体一体成型或者分体组装成型。
优选地，所述壳体包括底板、从所述底板周缘延伸的侧板以及与所述侧板连接并与所述底板间隔设置的盖板；所述底板、所述侧板和所述盖板围设成所述收容腔，所述盖板对应所述镜筒的位置设有贯穿所述盖板的开口；所述镜头驱动装置还包括设置于所述镜筒与所述底板之间的支点结构。
优选地，所述支点结构包括球体和凸台，所述凸台上开设与所述球体配合的凹槽，所述球体和所述凸台中一个与所述底板连接，所述球体和所述凸台中另一个与所述镜筒连接，所述球体至少部分位于所述凹槽内并与所述凹槽转动连接。
优选地，所述第二驱动组件包括相对设置的驱动线圈和磁性件，所述驱动线圈和所述磁性件中其一连接于所述镜筒，另一连接于所述壳体，所述第二驱动组件和所述压电驱动件沿平行于所述镜头的光轴方向间隔设置。
优选地，所述镜筒包括与所述壳体间隔设置的外侧壁，所述第二驱动组件包括多个，多个所述第二驱动组件围绕所述外侧壁间隔设置，每个所述第二驱动组件的所述驱动线圈和所述磁性件所在的平面均与所述外侧壁相平行。
优选地，所述镜头驱动装置还包括弹性支撑所述镜筒的弹性组件，所述弹性组件包括与所述镜筒连接的第一连接部、与所述壳体连接的第二连接部以及设置于所述第一连接部和所述第二连接部之间且弹性连接所述第一连接部和所述第二连接部的弹性件。
 有益效果
压电驱动件朝向壳体的一面与壳体连接，压电驱动件朝向镜筒的一面与镜筒连接，压电驱动件在通电的情况下伸长和/或缩短用于产生驱动镜筒绕镜头的光轴旋转的驱动力，从而实现镜头在滚动方向的抖动补偿。第二驱动组件驱动镜筒绕垂直于镜头的光轴的方向偏转实现镜头在俯仰和偏摆方向上的抖动补偿。
 附图说明
图1为本实用新型一实施例提供的镜头驱动装置的立体结构示意图；
图2为本实用新型一实施例提供的镜头驱动装置的部分爆炸结构示意图；
图3为图1中沿A-A向的剖视结构示意图；
图4为镜头驱动装置的一实施例的压电驱动组件与镜筒配合的立体结构示意图；
图5为镜筒在压电驱动组件的作用下发生偏转的示意图；
图6为镜筒在两个压电层的作用下绕光轴顺时针发生偏转的示意图；
图7为镜筒在两个压电层的作用下绕光轴逆时针发生偏转的示意图；
图8为镜头驱动装置的第二驱动组件的爆炸结构示意图；
图9为镜筒在驱动线圈和磁性件的作用下沿一个方向发生偏转的示意图；
图10为镜筒在驱动线圈和磁性件的作用下沿另一个方向发生偏转的示意图；
图11为本实用新型一实施例提供的弹性组件的立体结构示意图。
 本发明的实施方式
为了使本实用新型的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本实用新型进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本实用新型，并不用于限定本实用新型。基于本实用新型中的实施例，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，都属于本实用新型保护的范围。
本实用新型的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产 品或设备固有的其它步骤或单元。
需要说明的是，在本实用新型中涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本实用新型要求的保护范围之内。
请参看图1-3，本实用新型的一实施方式提供了一种镜头驱动装置1，镜头驱动装置1用于驱动镜头，以使镜头实现偏摆、俯仰和滚动方向的抖动补偿的防抖；在本申请中，偏摆即为绕镜筒20绕Y轴进行旋转，俯仰为镜筒20绕X轴进行旋转，滚动方向即为镜筒20绕Z轴进行旋转。Z轴的方向也即为与镜头的光轴方向平行的方向。镜头驱动装置1包括壳体10、镜筒20、驱动组件30、弹性组件40、支点结构50。镜筒20、驱动组件30、弹性组件40、支点结构50安装于壳体10内，其中，镜筒20用于收容镜头，镜筒20通过支点结构50和壳体10可转动连接，弹性组件40分别与壳体10、镜筒20连接，以支撑镜筒20并在镜筒完成偏摆、俯仰和滚动方向的抖动补偿后为镜筒提供回复力，驱动组件30用于驱动镜筒20相对壳体10实现偏摆、俯仰和滚动方向的抖动补偿。
请参看图3-4，壳体10包括底板11、从底板11周缘延伸的侧板12以及与侧板12连接并与底板11间隔设置的盖板13；其中，底板11、侧板12和盖板13围设成收容腔14，盖板13对应镜筒20的位置设有贯穿盖板13的开口131，镜筒20、驱动组件30、弹性组件40和支点结构50位于收容腔14内。优选地，侧板12和底板11垂直。优选地，盖板13和底板11平行。本申请中，侧板12包括四个。
镜筒20的形状和镜头的形状相匹配。镜筒20的材质不做限定，如可以为塑料。镜筒20包括远离开口131一侧的底壁21和从底壁21朝向开口131延伸并与壳体10间隔设置的外侧壁22。优选地，底壁21和外侧壁22垂直。本申请中，外侧壁22包括4个，相邻的两个外侧壁22之间相互垂直。
请再参看图2和3，支点结构50位于收容腔14内，支点结构50分别与底板11、镜筒20的底壁21连接，镜筒20通过支点结构50可相对壳体10转动。
具体地，支点结构50设置于镜筒20与底板11之间，支点结构50包括球体51和凸台52，凸台52上开设与球体51配合的凹槽521，球体51和凸台52中一个与底板11连接，球体51和凸台52中另一个与镜筒20连接，球体51至少部分位于凹槽521内并与凹槽521转动连接；通过设置支点结构50使得镜筒20相对壳体10的转动时受力更为稳定，转动的精度更优。本申请中，球体51与镜筒20的底壁21连接；凸台52与底板11连接。
优选地，支点结构50还包括连接板53，球体51通过连接板53与镜筒20的底壁21连接。优选地，连接板53与凸台52一体成型。
请再参看图2、3，弹性组件40分别与镜筒20的外侧壁22及壳体10的侧板12连接，弹性组件40用于支撑镜筒20并为镜筒20提供回复力。
镜头驱动装置1还包括供电板60，供电板60与驱动组件30电性连接，驱动组件30通过供电板60供电。供电板60可以为柔性电路板。
请参看图3，驱动组件30包括压电驱动件31和第二驱动组件32；压电驱动件31设置于收容腔14内，压电驱动件31分别与壳体10、镜筒20连接，压电驱动件31用于驱动镜筒20在收容腔14内绕镜头的光轴（光轴方向即为图2中L方向）转动、以实现镜筒20在滚动方向上的抖动补偿；第二驱动组件32设置于收容腔14内，第二驱动组件32分别与壳体10、镜筒20连接，用于驱动镜筒20以镜筒20与壳体10转动连接处为支点，沿垂直于镜头的光轴的方向偏转以实现镜筒20在偏摆和俯仰方向上的抖动补偿。
进一步地，压电驱动件31朝向壳体10的一面与壳体10连接，压电驱动件31朝向镜筒20的一面与镜筒20连接，压电驱动件31在通电时，压电驱动件31发生形变以产生第一驱动力用于驱动镜筒20在滚动方向上进行旋转。可以理解，压电驱动件31可以但不限于为压电驱动悬臂梁，压电驱动悬臂梁接通电源后能够发生形变、并产生上述第一驱动力。
请再参看图4和5，压电驱动件31包括至少两个且环设于镜筒20周侧；镜头驱动装置1包括环设于镜筒20并连接压电驱动件31与镜筒20的第一固定块71以及与第一固定块71间隔设置并连接压电驱动件31与壳体10的第二固定块72；在本申请中，压电驱动件31为四个，周向布设于四个侧板12和四个外侧壁22之间，在本申请中，压电驱动件31采用压电片311，压电片311可以是包括依次叠设的至少一层压电层的叠层结构，压电片311通电后伸长和/或收缩以产生上述第一驱动力，第一驱动力用于驱动镜筒20在收容腔14内绕滚动方向上进行旋转、以实现镜筒20在滚动方向上的抖动补偿。也就是说，在镜筒20和镜头受外部影响绕光轴进行转动时，压电片311通电后伸长和/或收缩以产生第一驱动力，以驱动镜筒20在收容腔14内绕光轴反向旋转，从而通过补偿实现镜筒20的防抖。
压电驱动件31的延伸方向垂直于镜头的光轴；第一固定块71与第二固定块72分别连接于压电驱动件31沿其延伸方向的相对两端；具体地，第一固定块71与镜筒20一体成型或者分体组装成型，第二固定块72与壳体一体成型或者分体组装成型。
在本申请中，第一固定块71的一端与压电片311朝向侧板12的一面连接,第一固定块71的另一端与侧板12连接，第二固定块72的一端与压电片311朝向外侧壁22的一面连接，第二固定块72的另一端与外侧壁22连接，第一固定块71、第二固定块72沿压电片311的延伸方向间隔设置，这样，第一固定块71、第二固定块72和压电片311呈“Z”字形；可以理解，第一固定块71可以与壳体10一体成型，第二固定块72可以与镜筒20一体成型。
请参图5，压电驱动件31的压电片311仅包括一个压电层，在压电片311通电时收缩的情况下，压电片产生驱动镜筒20绕光轴逆时针旋转的第一驱动力，实现镜筒20绕光轴逆时针旋转。在压电片311通电时伸长的情况下，压电片产生驱动镜筒20绕光轴顺时针旋转的第一驱动力，实现镜筒20绕光轴顺时针旋转。
请参看图6，本实施例中，压电驱动件31的压电片311也可以为依次叠设的第一压电层301和第二压电层302，第一压电层301朝向侧板12，第一压电层301的一端部与第一固定块71连接，第一压电层301通过第一固定块71与侧板12连接；第二压电层302朝向外侧壁22，第二压电层302远离第一压电层301的一端部的端部与第二固定块72连接，第二压电层302通过第二固定块72与外侧壁22连接。
第一压电层301和第二压电层302的第一种通电情况：第一压电层301通电后伸长、第二压电层302通电后收缩，压电驱动件31产生驱动镜筒20绕Z轴顺时针旋转的驱动力，用于驱动镜筒20在滚动方向实现抖动补偿。
请参看图7，第一压电层301和第二压电层302的第二种通电情况：第一压电层301通电后收缩、第二压电层302通电后伸长，压电驱动件31产生驱动镜筒20绕Z轴逆时针旋转的驱动力，用于驱动镜筒20在滚动方向实现抖动补偿。
请再参看图8-10，第二驱动组件32为多个，多个第二驱动组件32设置于壳体10和镜筒20之间且与壳体10和镜筒20相连接，多个第二驱动组件32围绕外侧壁22间隔设置，每个第二驱动组件32的驱动线圈321和磁性件322所在的平面均与对应的外侧壁22相平行。
在一实施例中，第二驱动组件32为四个，周向布设于四个侧板12和镜筒20的四个外侧壁22之间，每一第二驱动组件32均包括一驱动线圈321和一磁性件322，驱动线圈321和磁性件322中任意一者安装至壳体10的一侧板12，另外一者安装至镜筒20的一外侧壁22；其中，壳体10的一侧板12与镜筒20的一外侧壁22相对设置；如，驱动线圈321安装在镜筒20的外侧壁22上、磁性件322安装在壳体10的侧板12上，或驱动线圈321安装在壳体10的侧板12上、磁性件322安装在镜筒20的外侧壁22上，只需要满足若干驱动线圈321分别与若干磁性件322之间能够产生第二驱动力，用于驱动镜筒20在收容腔14内实现偏摆和俯仰方向上的抖动补偿即可，而不对驱动线圈321和磁性件322安装于哪一个部件或者安装的具体位置做过多限定，这样就能够在镜头驱动装置1因受外部影响，整体在俯仰或偏摆方向旋转时，通过将驱动线圈321通电，使得通电的驱动线圈321和对应的磁性件322之间产生第二驱动力，以驱动镜筒20在收容腔14内以镜筒20与壳体10的连接处为支点进行绕垂直于光轴的方向偏转，从而实现镜筒20在偏摆和俯仰方向上的抖动补偿。
优选地，该磁性件322为磁铁、磁钢或软磁件。
请参看图11，镜头驱动装置1还包括弹性支撑镜筒20的弹性组件40，弹性组件40包括与镜筒20连接的第一连接部41、与壳体10连接的第二连接部42以及设置于第一连接部41和第二连接部42之间且弹性连接第一连接部41和第二连接部42的弹性件43；当驱动组件30驱动镜筒20相对壳体10实现偏摆、俯仰和滚动方向的抖动补偿时，弹性件43发生形变产生回复力，当驱动组件30断电后，弹性件43的回复力用于驱动镜筒20复位。
综上，压电驱动件31在通电的情况下伸长和/或缩短用于产生驱动镜筒20绕镜头的光轴旋转的驱动力，从而实现镜头在滚动方向的抖动补偿。第二驱动组件32驱动镜筒20绕垂直于镜头的光轴的方向偏转实现镜头在俯仰和偏摆方向上的抖动补偿。
需要说明的是，本实用新型实施例中所有方向性指示（诸如上、下、内、外、顶部、底部……）仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
还需要说明的是，当元件被称为“固定于”或“设置于”另一个元件上时，该元件可以直接在另一个元件上或者可能同时存在居中元件。当一个元件被称为“连接”另一个元件，它可以是直接连接另一个元件或者可能同时存在居中元件。
以上所述的仅是本实用新型的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本实用新型创造构思的前提下，还可以做出改进，但这些均属于本实用新型的保护范围。

Claims (11)

  1. 一种镜头驱动装置，其特征在于，所述镜头驱动装置包括：
    收容镜头的镜筒；
    壳体，所述壳体包括收容腔，所述镜筒安装在所述收容腔内，所述镜筒和所述壳体可转动连接；
    驱动所述镜筒绕所述镜头的光轴旋转的压电驱动件，所述压电驱动件设置于所述收容腔内并位于所述壳体和所述镜筒之间，所述压电驱动件朝向所述壳体的一面与所述壳体连接，所述压电驱动件朝向所述镜筒的一面与所述镜筒连接；及
    驱动所述镜筒绕垂直于所述镜头的光轴的方向偏转的第二驱动组件，所述第二驱动组件设置于所述壳体和所述镜筒之间且与所述壳体和所述镜筒相连接。
  2. 如权利要求1所述的镜头驱动装置，其特征在于：所述压电驱动件包括至少两个且环设于所述镜筒周侧；所述镜头驱动装置包括环设于所述镜筒并连接所述压电驱动件与所述镜筒的第一固定块以及与所述第一固定块间隔设置并连接所述压电驱动件与所述壳体的第二固定块。
  3. 如权利要求2所述的镜头驱动装置，其特征在于：所述压电驱动件的延伸方向垂直于所述镜头的光轴。
  4. 如权利要求3所述的镜头驱动装置，其特征在于：所述第一固定块与所述第二固定块分别连接于所述压电驱动件沿其延伸方向的相对两端。
  5. 如权利要求3所述的镜头驱动装置，其特征在于：所述压电驱动件包括至少两个依次叠设的压电层。
  6. 如权利要求3所述的镜头驱动装置，其特征在于：所述第一固定块与所述镜筒一体成型或者分体组装成型；所述第二固定块与所述壳体一体成型或者分体组装成型。
  7. 如权利要求1所述的镜头驱动装置，其特征在于：所述壳体包括底板、从所述底板周缘延伸的侧板以及与所述侧板连接并与所述底板间隔设置的盖板；所述底板、所述侧板和所述盖板围设成所述收容腔，所述盖板对应所述镜筒的位置设有贯穿所述盖板的开口；所述镜头驱动装置还包括设置于所述镜筒与所述底板之间的支点结构。
  8. 如权利要求7所述的镜头驱动装置，其特征在于：所述支点结构包括球体和凸台，所述凸台上开设与所述球体配合的凹槽，所述球体和所述凸台中一个与所述底板连接，所述球体和所述凸台中另一个与所述镜筒连接，所述球体至少部分位于所述凹槽内并与所述凹槽转动连接。
  9. 如权利要求1所述的镜头驱动装置，其特征在于：所述第二驱动组件包括相对设置的驱动线圈和磁性件，所述驱动线圈和所述磁性件中其一连接于所述镜筒，另一连接于所述壳体，所述第二驱动组件和所述压电驱动件沿平行于所述镜头的光轴方向间隔设置。
  10. 如权利要求9所述的镜头驱动装置，其特征在于：所述镜筒包括与所述壳体间隔设置的外侧壁，所述第二驱动组件包括多个，多个所述第二驱动组件围绕所述外侧壁间隔设置，每个所述第二驱动组件的所述驱动线圈和所述磁性件所在的平面均与所述外侧壁相平行。
  11. 如权利要求1所述的镜头驱动装置，其特征在于：所述镜头驱动装置还包括弹性支撑所述镜筒的弹性组件，所述弹性组件包括与所述镜筒连接的第一连接部、与所述壳体连接的第二连接部以及设置于所述第一连接部和所述第二连接部之间且弹性连接所述第一连接部和所述第二连接部的弹性件。
PCT/CN2020/101495 2020-06-30 2020-07-10 镜头驱动装置 WO2022000547A1 (zh)

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CN110475050A (zh) * 2018-05-09 2019-11-19 三星电子株式会社 提供稳定功能的相机模块和包括该相机模块的电子设备

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