WO2020243858A1 - 自动对焦镜头组件 - Google Patents

自动对焦镜头组件 Download PDF

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Publication number
WO2020243858A1
WO2020243858A1 PCT/CN2019/089721 CN2019089721W WO2020243858A1 WO 2020243858 A1 WO2020243858 A1 WO 2020243858A1 CN 2019089721 W CN2019089721 W CN 2019089721W WO 2020243858 A1 WO2020243858 A1 WO 2020243858A1
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WO
WIPO (PCT)
Prior art keywords
side arm
base
plate body
lens
plate
Prior art date
Application number
PCT/CN2019/089721
Other languages
English (en)
French (fr)
Inventor
李林珍
卢继亮
李刚
张晋
Original Assignee
瑞声光学解决方案私人有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞声光学解决方案私人有限公司 filed Critical 瑞声光学解决方案私人有限公司
Priority to PCT/CN2019/089721 priority Critical patent/WO2020243858A1/zh
Priority to JP2020543310A priority patent/JP7025558B2/ja
Priority to CN201910487428.6A priority patent/CN110262158B/zh
Priority to US16/993,302 priority patent/US20200379211A1/en
Publication of WO2020243858A1 publication Critical patent/WO2020243858A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • 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
    • G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
    • 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
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G03B13/36—Autofocus systems
    • 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
    • G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification

Definitions

  • the invention relates to the field of lens optical anti-shake and automatic focusing, in particular to an automatic focusing lens assembly.
  • the high-performance lens module generally has autofocus function (auto focusing) and optical image stabilization (OIS: optical image stabilization).
  • the autofocus function of the existing camera lens module is that the voice coil motor drives the lens to achieve autofocus, and after the autofocus, the voice coil motor drives the lens to reset to the initial position.
  • the lens structure of this structure is relatively complicated, and it is difficult to realize the miniaturization of the lens module.
  • the objective of the present invention is to provide an autofocus lens assembly with a simple and compact structure and capable of achieving a miniaturized design.
  • An auto-focusing lens assembly includes a lens, a first base, a second base, and a pair of resetting structures.
  • the lens is located in the first base, and the first base extends along a line parallel to the lens.
  • the direction of the optical axis is slidably mounted on the second base;
  • the first base includes a first bottom plate and first side arms bent and extended from the first bottom plate and located on both sides of the lens, so
  • the second base includes a second bottom plate and second side arms that are bent and extended from the second bottom plate and are respectively located outside the first side arm, and the first side arm includes a second side arm opposite to the second side arm
  • the first plate body and the second plate body bent and extended from one end of the first plate body away from the first bottom plate and located above the second side arm; each side of the lens is provided with a reset Structure, the reset structure includes a magnetic steel assembly arranged between the second side arm and the second plate body, a guide structure arranged between the first plate body and the second side arm, And an elastic
  • the projection of the magnetic steel component in the direction perpendicular to the optical axis is located on the elastic member.
  • the guiding structure is located between the elastic member and the magnetic steel assembly in a direction perpendicular to the optical axis of the lens.
  • the first side arm further includes a third plate body bent and extended from an end of the first plate body away from the object side of the lens in the optical axis direction, the first plate body and the second plate The body and the third plate body form a recess for accommodating the second side arm.
  • each of the magnetic steel components includes a first magnetic steel arranged on a side of the second side arm facing the second plate body and a first magnetic steel arranged on the second plate body facing the second side
  • the second magnet is arranged on one side of the arm and opposite to the first magnet.
  • each of the guide structures includes a first guide groove recessed on the surface of the first plate body facing the second side arm along the optical axis direction, and is provided on the second side arm facing the second side arm.
  • the surface of the first plate body is used to cooperate with the first guide groove to form a bearing portion of the guide channel, and a ball sandwiched between the first guide groove and the bearing portion.
  • the auto-focus lens assembly further includes a memory alloy wire for auto-focusing the lens, one end of the memory alloy wire is fixed to the first base, and the other end is fixed to the second base.
  • the projection of the elastic member along the direction perpendicular to the optical axis is located on the memory alloy line.
  • the embodiment of the present invention resets to the initial position under the guidance of the guide structure by setting the elastic member to cooperate with the magnetic steel assembly to pull the offset first base.
  • the reset structure of this design is simple, and the magnetic steel component is arranged between the second side arm and the second plate body, the guiding structure is arranged between the first plate body and the second side arm, and the elastic member is parallel to the The direction of the optical axis is set between the first side arm and the second side arm.
  • the overall structure formed by the reset structure, the first base, the second base and the lens is very compact, so that the overall size of the lens assembly can be made small , Realize miniaturization design.
  • Figure 2 is a schematic diagram of the structure of the lens and the first base
  • FIG. 4 is an exploded schematic diagram of an auto-focus lens assembly provided by an embodiment of the present invention.
  • Figure 5 is a schematic diagram of the cooperation between the first base and the second base
  • Fig. 6 is a schematic diagram showing the cooperation of the first base and the second base from another perspective
  • FIG. 7 is a schematic diagram of the structure of the first base and the second base
  • Figure 8 is a schematic structural diagram of the first base
  • Figure 9 is a schematic view of the structure of the second base.
  • an embodiment of the present invention provides a lens assembly 100 including a first base 11, a lens 13, a first memory alloy wire 14 and a second memory alloy wire 15, and the lens 13 is located on the first base 11. in.
  • the first base 11 includes a first bottom plate 111, a first side plate 112 bent and extended from the first bottom plate 111 and located on one side of the lens 13, and a second side plate 112 bent and extended from the first bottom plate 111 and located on the other side of the lens 13. ⁇ 113 ⁇ Side board 113.
  • the first memory alloy wire 14 and the second memory alloy wire 15 are both suspended above the lens 13, one end of the first memory alloy wire 14 is connected to the side of the first side plate 112 away from the first bottom plate 111, and the other end is connected to the lens 13 is connected to the side close to the second side plate 112, one end of the second memory alloy wire 15 is connected to the side of the second side plate 113 away from the first bottom plate 111, and the other end is connected to the side of the lens 13 close to the first side plate 112
  • the first memory alloy wire 14 and the second memory alloy wire 15 are both arranged perpendicular to the optical axis S of the lens 13.
  • the lens 13 When the lens 13 is not shifted, the lens 13 is located at the initial position of the first base 12, the first memory alloy wire 14 and the second memory alloy wire 15 are in a relaxed state, when the lens 13 faces the first side plate 112 or the second When the side plate 113 is shifted, taking the lens 13 shifted toward the second side plate 113 as an example, the first memory alloy wire 14 is elongated, and current is applied to the first memory alloy wire 14, the temperature increases, and the first memory The length of the alloy wire 14 is shortened according to its own physical characteristics, so that the lens 13 is pulled back to the initial position, and the optical anti-shake of the lens 13 is realized, thereby improving the imaging quality of the lens 13.
  • the first memory alloy wire 14 and the second memory alloy wire 15 are energized and deformed to drive the lens 13 to move back and forth relative to the first side plate 112 and the second side plate 113.
  • the realization of optical anti-shake does not require the traditional way of driving by the interaction between the voice coil and the magnetic steel, there is no magnetic field interference problem, and the stability is high.
  • the driving setting method is simple in structure and convenient to install.
  • first memory alloy wire 14 and the second memory alloy wire 15 are not limited to being arranged in parallel and spaced apart.
  • the first memory alloy wire 14 and the second memory alloy wire 15 are arranged in a coaxial arrangement (the first memory alloy wire One end of the wire 14 is connected to the first side plate 112, and the other end is connected to the middle position of the lens 13.
  • one end of the second memory alloy wire 15 is connected to the second side plate 113, and the other end is connected to the middle position of the lens 13 )
  • one end of the first memory alloy 13 is not limited to be connected to the side of the first side plate 112 away from the first bottom plate 111, one end of the first memory alloy 13 can be connected to any position of the first side plate 112, and One end is connected to the lens 13, as long as the first memory alloy 13 has a sufficient length to pull the lens 13 to move between the first side plate 112 and the second side plate 113.
  • both the first shape memory alloy wire 14 and the second shape memory alloy wire 15 are made of nickel-titanium alloy materials, and are controlled to pass into the first shape memory alloy wire 14 and the second shape memory alloy wire 15
  • the amount of electricity can control the heat generated by the first shape memory alloy wire 14 and the second shape memory alloy wire 15 so as to control the amount of shortening of the first shape memory alloy wire 14 and the second shape memory alloy wire 15.
  • the first memory alloy wire 14 and the second memory alloy wire 15 have their own physical properties: when the length is shortened, the resistance value thereof will change. Therefore, the detection circuit and the chip can be set to detect whether the lens has shifted. Specifically, the detection circuit detects the magnitude of the current flowing through the first shape memory alloy wire 14 and the second shape memory alloy wire 15 and transmits a signal to the chip.
  • the detected current signal calculates the resistance value of the first shape memory alloy wire 14 and the second shape memory alloy wire 15, and the chip obtains the first value according to the corresponding relationship between the resistance value and the length of the first shape memory alloy wire 14 and the second shape memory alloy wire 15
  • the length values of the shape memory alloy wire 14 and the second shape memory alloy wire 15 are used to determine whether the first shape memory alloy wire 14 and the second shape memory alloy wire 15 are shortened, and the amount of shortening, and in turn control the access to the first shape memory alloy wire 14 And the magnitude of the current of the second shape memory alloy wire 15, thereby pulling the lens 13 back to the initial position more accurately.
  • the lens assembly 100 further includes two first connection terminals 16 and two second connection terminals 17, one of the two first connection terminals 16 and the first side plate 112 are far away from the first side plate 112.
  • One side of the bottom plate 111 is connected, the other is connected to the side of the lens 13 close to the second side plate 113, the two ends of the first memory alloy wire 14 are respectively connected to two first connection terminals 16;
  • two second connection terminals 17 One of them is connected to the side of the second side plate 113 away from the first bottom plate 111, and the other is connected to the side of the lens 13 close to the first side plate 112.
  • the two ends of the second memory alloy wire 15 are respectively connected to two second The terminal 17 is connected.
  • first connection terminal 16 and the second electrical connection terminal 17 By arranging the first connection terminal 16 and the second electrical connection terminal 17, it is convenient to connect the first memory alloy wire 14 and the first side plate 112, and the second memory alloy wire 15 and the second side plate 113 on the other hand.
  • the first memory alloy wire 14 and the second memory alloy wire 15 are connected to an external power cord.
  • the lens assembly 100 is not provided with the first connection terminal 16 and the second electrical connection terminal 17.
  • the first memory alloy wire 14 and the second memory alloy wire 15 can be fixed to the lens 13 and the lens 13 by other connection methods. Between the first side plate 112 and the second side plate 113.
  • the lens assembly 10 further includes a first ball 18 disposed between the lens 13 and the first base 11.
  • a first ball 18 disposed between the lens 13 and the first base 11.
  • the first side plate 112 and the second side plate 113 are both provided with a first groove 115, and the opposite sides of the lens 13 are provided with first protrusions 131, two The first protrusions 131 are respectively embedded in the two first grooves 115.
  • Each first groove 115 includes a first side surface 116 and a second side surface 117 spaced apart along the optical axis S direction.
  • the protrusion 131 includes a first surface 132 opposite to the first side surface 116 and a second surface 133 opposite to the second side surface 117.
  • the first side surface 116 is recessed with a first guide groove 118, and the first surface 132 is recessed.
  • the first guide groove 118 is perpendicular to the direction of the optical axis S and is arranged parallel to the first bottom plate 111.
  • first guide grooves 118 there are two first guide grooves 118, and the two first guide grooves 118 are arranged in parallel and spaced apart in a direction perpendicular to the first bottom plate 111.
  • second guide grooves 134 there are two second guide grooves 134, the two second guide grooves 134 are arranged in parallel and spaced in a direction perpendicular to the first bottom plate 111, and the two second guide grooves 134 are respectively arranged in alignment with the two first guide grooves 118
  • At least one first ball 18 is embedded before each group of the first guide groove 118 and the second guide groove 134.
  • the first protrusion 131 is provided with a first magnet 135 on the side of the second surface 133, and the first groove 115 is provided with the first magnet 135 on the second side surface 117.
  • the second magnet 119 is arranged opposite to the first magnet 135 to be magnetically attracted.
  • the first magnet 135 and the second magnet 119 are mainly used to cooperate with the first memory alloy wire 14 or the second memory alloy wire 15 to reset the shifted lens 13 to the initial position. Initially, the lens 13 is not shifted, and the first magnet 135 and the second magnet 119 are set in alignment.
  • the lens 13 shifts, for example, when the lens 13 shifts to the second side plate 113,
  • the first memory alloy wire 14 is elongated, the first magnetic steel 135 and the second magnetic steel 119 are misaligned, and the first memory alloy wire 14 is energized and shrunk, and at the same time it cooperates with the first magnetic steel 135 and the second magnetic steel 119.
  • the magnetic force resets the lens 13 to the initial position.
  • the lens assembly 100 further includes a second base 19, a third shape memory alloy wire 20, a fourth shape memory alloy wire 21, and a pair of reset structures 22.
  • the first base 11 is slidably mounted on the second base 19 along a direction parallel to the optical axis S of the lens 13, and the second base 19 includes a second bottom plate 191 bent and extended from the second bottom plate 191 and is located on the first side
  • the third shape memory alloy wire 20 extends in the direction parallel to the optical axis S and its two ends are connected to the first side plate 112 and the third side plate 192 respectively.
  • the fourth shape memory alloy wire 21 extends in the direction of the optical axis S and has two ends connected to the The two side plates 113 and the fourth side plate 193 are connected between the first side plate 112 and the third side plate 192, and between the second side plate 113 and the fourth side plate 193, a reset structure 22 is provided.
  • the reset structure 22 is used To reset the shifted first base 11 and lens 13 to their initial positions.
  • the first base 11 is located at the initial position of the second base 19, that is, the lens 13 is located at the preset initial position.
  • the third shape memory alloy wire 20 and the fourth shape memory alloy wire 21 generate heat, and the length shrinks, thereby pulling the first base 11 relative to the first base 11
  • the second base 13 is displaced along the direction of the optical axis S of the lens 13 to realize the focusing of the lens 13.
  • the current is cut off, and the reset structure resets the lens 13 along with the first base 11 to the initial position.
  • the third shape memory alloy wire 20 and the fourth shape memory alloy wire 21 are energized and deformed, and the reset structure 20 drives the first base 11, that is, drives the lens 13 along the optical axis S direction.
  • the driving setting method is simple in structure, easy to install, and not Need to add additional Hall element, high reliability in special environment.
  • the use of the third shape memory alloy wire 20 and the fourth shape memory alloy wire 21 in this embodiment can significantly reduce the weight and cost; in addition, compared with the existing The anti-shake structure using magnets and anti-shake coils, the third memory alloy wire 20 and the fourth memory alloy wire 21 used in this embodiment can pull the first base 11 to move automatically by passing a small amount of current. The focusing effect effectively reduces power consumption.
  • the first side plate 112 and the second side plate 113 of the first base 11 are collectively referred to as the first side arm 11a
  • the third side plate 192 and the fourth side plate 193 of the second base 19 are collectively referred to as The second side arm 19a
  • the first base 11 includes a first bottom plate 111 and first side arms 11a that are bent and extended from the first bottom plate 111 and are respectively located on both sides of the lens 13
  • the second base 19 includes a second bottom plate 191 And second side arms 19a bent and extended from the second bottom plate 191 and respectively located outside the first side arms 11a.
  • the first side arms 11a include a first plate body 101 opposite to the second side arms 19a and a second plate body 101 is a second plate body 102 that is bent and extended at one end away from the first bottom plate 112 and is located above the second side arm 19a; each side of the lens 13 is provided with a reset structure 22, and the reset structure 22 includes the second side arm 19a and the second side arm 19a.
  • the elastic member 25 between the two side arms 19a.
  • the first base 11, which is deflected by the elastic member 25 and the magnetic steel assembly 23, is set to return to the initial position under the guidance of the guide structure 24.
  • the reset structure 22 is simple in structure, and is provided between the second side arm 19a and the second plate 102 by arranging the magnetic steel assembly 23, and the guiding structure 24 is provided between the first plate 101 and the second side arm 19a, and is elastic
  • the member 25 is arranged between the first side arm 11a and the second side arm 19a along the direction parallel to the optical axis S.
  • the overall structure formed by the reset structure 22, the first base 11, the second base 19 and the lens 13 is very The compactness enables the overall size of the lens assembly 100 to be made small, realizing a miniaturized design.
  • the projection of the magnetic steel assembly 23 in the direction perpendicular to the optical axis S is located on the elastic member 25.
  • the guiding structure 24 is located between the elastic member 25 and the magnetic steel assembly 23 in a direction perpendicular to the optical axis S of the lens 13.
  • the first side arm 11a further includes a third plate body 103 bent and extended from the end of the first plate body 101 away from the object side of the lens 13 along the optical axis S direction, and the first plate body 101 , The second plate body 102 and the third plate body 103 form a recess 26 for accommodating the second side arm 19a.
  • the second side arm 19a includes a first connecting portion 104 connected to the second bottom plate 191, a second connecting portion 105 spaced apart from and opposite to the first connecting portion 104, and The connecting portion 104 is far away from the third board 103 and the second connecting portion 105 is away from the third connecting portion 106 connected to the third board 103.
  • One end of the elastic member 25 is connected to the third board 103, and the other end is connected to the third board 103.
  • the three connecting parts 106 are connected.
  • two magnetic steel components 23 are arranged at intervals between the second side arm 19a and the second plate 102.
  • each of the magnetic steel components 23 includes a first magnetic steel 231 arranged on the side of the second side arm 19a facing the second plate 102 and a first magnetic steel 231 arranged on the second plate 102 facing the second
  • the second magnet 232 is arranged on one side of the side arm 19a and directly opposite to the first magnet 231.
  • the first magnet 231 and the second magnet 232 are arranged directly opposite, and the third memory alloy wire 20 and the fourth memory alloy wire 21 pull the first base 11 to move relative to the second base 19 , The first magnetic steel 231 and the second magnetic steel 232 are misaligned.
  • the first magnetic steel 231 and the second magnetic steel 232 act by magnetic force and cooperate with elasticity
  • the elastic force of the member 25 resets the first base 11 and the lens 13 to the initial position.
  • the side of the second side arm 19a facing the second plate 102 is provided with a first accommodating groove 195, and the first magnet 231 is embedded in the first accommodating groove 195.
  • the second accommodating groove 107 is recessed on the side of the second plate 102 facing the second side arm 19 a, and the second magnetic steel insert 232 is disposed in the second accommodating groove 107.
  • each of the guide structures 24 includes a first guide groove 241 recessed on the surface of the first plate 101 facing the second side arm 19a along the optical axis S direction, and provided on the second side arm 19a facing the first plate 101 The surface is used to cooperate with the first guide groove 241 to form the supporting portion 242 of the guide channel, and the second ball 243 sandwiched between the first guide groove 241 and the supporting portion 242.
  • the elastic member 25 located on the same side of the third memory alloy wire 20 is located on the third memory alloy wire 20 along the projection of the direction perpendicular to the optical axis S;
  • the projection of the elastic member 25 on the same side along the direction perpendicular to the optical axis S is located on the fourth memory alloy wire 21.
  • the lens assembly 100 further includes two third connection terminals 27 and two fourth connection terminals 28, and the two third connection terminals 27 are respectively installed on the first side arm 11a and the second side.
  • the two third connection terminals 27 are respectively installed on the first side arm 11a and the second side.
  • both ends of the third memory alloy wire 20 are respectively connected to the two third connection terminals 27; the two fourth connection terminals 28 are respectively installed on the first side arm 11a and the second side arm 19a.
  • the two ends of the alloy wire 21 are respectively connected to the two fourth connection terminals 28.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
  • Adjustment Of Camera Lenses (AREA)
  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

一种自动对焦镜头组件，包括镜头（13）、第一基座（11）、第二基座（19）以及一对复位结构（22），镜头（13）位于第一基座（11）中，第一基座（11）沿平行于镜头（13）的光轴的方向可滑动安装于第二基座（19）；第一基座（11）包括第一底板（111）和自第一底板（111）弯折延伸且分别位于镜头（13）两侧的第一侧臂（11a），第二基座（19）包括第二底板（191）和自第二底板（191）弯折延伸且分别位于第一侧臂（11a）外侧的第二侧臂（19a），第一侧臂（11a）包括第一板体(101)和位于第二侧臂（19a）上方的第二板体（102）；镜头（13）的两侧各设置一个复位结构（22），复位结构（22）包括设置于第二侧臂（19a）与第二板体（102）之间的磁钢组件（23）、设置于第一板体（101）与第二侧臂（19a）之间的引导结构（24）、以及沿平行于光轴的方向设置于第一侧臂（11a）与第二侧臂（19a）之间的弹性件（25）。该自动对焦镜头组件具有结构紧凑能够实现小型化设计的优点。

Description

自动对焦镜头组件 技术领域
本发明涉及镜头光学防抖和自动对焦领域，尤其涉及一种自动对焦镜头组件。
 背景技术
近年来，在如智能手机、平板电脑一样的便携式终端机上都装载有高性能镜头模组。该高性能镜头模组一般具有自动对焦功能(auto focusing)和光学防抖功能(OIS：optical image stabilization)。
现有照相机镜头模组的自动对焦功能是通过音圈马达驱动镜头位于实现自动对焦，自动对焦后音圈马达再驱动镜头复位到初始位置。然而，这种结构的镜头结构比较复杂，难以实现镜头模组的小型化。
 因此，有必要提供一种新的照相机镜头模组以解决上述问题。
 技术问题
本发明的目的提供一种结构简单紧凑，能够实现小型化设计的自动对焦镜头组件。
 技术解决方案
本发明的目的采用如下技术方案实现：
一种自动对焦镜头组件，包括镜头、第一基座、第二基座以及一对复位结构，所述镜头位于所述第一基座中，所述第一基座沿平行于所述镜头的光轴的方向可滑动安装于所述第二基座；所述第一基座包括第一底板和自所述第一底板弯折延伸且分别位于所述镜头两侧的第一侧臂，所述第二基座包括第二底板和自所述第二底板弯折延伸且分别位于所述第一侧臂外侧的第二侧臂，所述第一侧臂包括与所述第二侧臂相对的第一板体和自所述第一板体远离所述第一底板一端弯折延伸且位于所述第二侧臂上方的第二板体；所述镜头的两侧各设置一个所述复位结构，所述复位结构包括设置于所述第二侧臂与所述第二板体之间的磁钢组件、设置于所述第一板体与所述第二侧臂之间的引导结构、以及沿平行于光轴的方向设置于所述第一侧臂与所述第二侧臂之间的弹性件。
作为一种改进方式，所述磁钢组件沿垂直于光轴方向的投影位于所述弹性件上。
作为一种改进方式，所述引导结构在垂直于所述镜头的光轴的方向上位于所述弹性件与所述磁钢组件之间。
作为一种改进方式，所述第一侧臂还包括自所述第一板体沿光轴方向远离镜头物侧的一端弯折延伸的第三板体，所述第一板体、第二板体及第三板体形成收容所述第二侧臂的凹陷部。
作为一种改进方式，所述第二侧臂包括与所述第二底板连接的第一连接部、与所述第一连接部间隔且相对设置的第二连接部、以及与所述第一连接部远离所述第三板体一侧和所述第二连接部远离所述第三板体一侧连接的第三连接部，所述弹性件的一端与所述第三板体连接、另一端与所述第三连接部连接。
作为一种改进方式，所述第二侧臂与所述第二板体之间设有两个间隔设置的所述磁钢组件。
作为一种改进方式，各所述磁钢组件包括设置于所述第二侧臂朝向所述第二板体一侧的第一磁钢和设置于所述第二板体朝向所述第二侧臂一侧并与所述第一磁钢正对设置的第二磁钢。
作为一种改进方式，第二侧臂朝向所述第二板体的一侧设有第一容置槽，所述第一磁钢嵌设于所述第一容置槽中，所述第二板体朝向所述第二侧臂一侧凹设有第二容置槽，所述第二磁钢嵌设于所述第二容置槽中。
作为一种改进方式，所述第二侧臂与所述第一板体之间设有两个间隔设置的所述引导结构。
作为一种改进方式，各所述引导结构包括沿光轴方向凹设于所述第一板体朝向所述第二侧臂的表面的第一导槽，设于所述第二侧臂朝向所述第一板体的表面用于与所述第一导槽配合形成引导通道的承靠部、以及夹设于所述第一导槽与所述承靠部之间的滚珠。
作为一种改进方式，所述自动对焦镜头组件还包括为所述镜头实现自动对焦的记忆合金线，所述记忆合金线的一端固定于所述第一基座、另一端固定于所述第二基座，所述弹性件沿垂直于光轴方向的投影位于所述记忆合金线上。
 有益效果
本发明实施方式相对于现有技术而言，通过设置弹性件配合磁钢组件拉动偏移的第一基座在引导结构的引导下复位到初始位置，相对于传统的使用音圈电机的方式，该设计方式的复位结构结构简单，而且通过设置磁钢组件设置于第二侧臂与第二板体之间，引导结构设置于第一板体与第二侧臂之间，弹性件沿平行于光轴的方向设置于第一侧臂与第二侧臂之间，复位结构、第一基座、第二基座以及镜头形成的整体的结构非常的紧凑，使得镜头组件整体的尺寸可以做小，实现小型化设计。
 附图说明
图1为本发明实施例提供的自动对焦镜头组件的结构示意图；
图2为镜头与第一基座的结构示意图；
图3为镜头与第一基座另一视角的结构示意图；
图4为本发明实施例提供的自动对焦镜头组件的爆炸示意图；
图5为第一基座与第二基座的配合示意图；
图6为第一基座与第二基座另一视角的配合示意图；
图7为第一基座与第二基座的结构示意图；
图8为第一基座的结构示意图；
图9为第二基座的结构示意图。
 本发明的实施方式
下面结合附图和实施方式对本发明作进一步说明。
请参阅图1-3, 本发明的实施例提供一种镜头组件100包括第一基座11、镜头13、第一记忆合金线14以及第二记忆合金线15，镜头13位于第一基座11中。第一基座11包括第一底板111、自第一底板111弯折延伸且位于镜头13一侧的第一侧板112以及自第一底板111弯折延伸且位于镜头13另一侧的第二侧板113。第一记忆合金线14和第二记忆合金线15均悬置于镜头13的上方，第一记忆合金线14的一端与第一侧板112远离第一底板111的一侧连接、另一端与镜头13靠近第二侧板112的一侧连接，第二记忆合金线15的一端与第二侧板113远离第一底板111的一侧连接、另一端与镜头13靠近第一侧板112的一侧连接，第一记忆合金线14和第二记忆合金线15都与镜头13的光轴S垂直设置。
镜头13未发生偏移时，镜头13位于第一基座12的初始位置，第一记忆合金线14和第二记忆合金线15处于松弛状态，当镜头13朝向第一侧板112或者朝向第二侧板113偏移时，以镜头13朝向第二侧板113偏移为例，第一记忆合金线14被拉长，往第一记忆合金线14中通入电流，温度升高，第一记忆合金线14根据自身的物理特性，长度缩短，从而将镜头13拉回初始位置，实现镜头13的光学防抖，从而提高镜头13的成像质量。
相对于现有技术而言，本实施例通过设置第一记忆合金线14和第二记忆合金线15通电发生形变带动镜头13在相对于第一侧板112、第二侧板113之前往复移动以实现光学防抖，不需要传统的采用音圈与磁钢相互作用的方式进行驱动，没有磁场干扰问题，稳定性较高，而且该驱动的设置方式，结构简单，安装方便，不需要额外增加霍尔元件，在特殊环境下使用可靠性高；而且相对于现有的采用磁铁配合防抖线圈的防抖结构，本实施例中采用第一记忆合金线14和第二记忆合金线15能够明显地降重和降低成本；此外，相对于现有的采用磁铁配合防抖线圈的防抖结构，本实施例中采用的第一记忆合金线14和第二记忆合金线15只要通入少量的电流即可以拉动镜头13起到光学防抖的效果，有效降低了功耗。
可以理解地，第一记忆合金线14和第二记忆合金线15不局限于设置为平行间隔设置，例如第一记忆合金线14和第二记忆合金线15设置为同轴设置（第一记忆合金线14的一端与第一侧板连接112，另一端连接至镜头13的中间位置，同理，第二记忆合金线15的一端与第二侧板连接113，另一端连接至镜头13的中间位置）也是可以的，只要第一记忆合金线14和第二记忆合金线15可以拉动镜头13相对于第一侧板112和第二侧板113往复移动以实现光学防抖即可。进一步地，第一记忆合金13的一端不局限于与第一侧板112之远离第一底板111的一侧连接，第一记忆合金13的一端可以与第一侧板112的任意位置连接，另一端与镜头13连接，只要第一记忆合金13具有足够的长度可以拉动镜头13在第一侧板112和第二侧板113之间移动即可。
优选地，本实施例中，第一记忆合金线14和第二记忆合金线15都采用镍钛合金材料制成，通过控制通入第一记忆合金线14中和第二记忆合金线15中的电量，可以控制第一记忆合金线14中和第二记忆合金线15产生的热量，从而起到控制第一记忆合金线14中和第二记忆合金线15的缩短量。
需要说明的是，第一记忆合金线14和第二记忆合金线15由于其自身的物理特性：长度缩短时，其阻值会发生变化。因而，可以通过设置检测电路和芯片来检测镜头是否发生偏移，具体地，检测电路检测流经第一记忆合金线14和第二记忆合金线15的电流的大小并传递信号给芯片，芯片根据检测的电流信号运算出第一记忆合金线14和第二记忆合金线15的电阻值，芯片再根据第一记忆合金线14和第二记忆合金线15的电阻值与长度的对应关系获得第一记忆合金线14和第二记忆合金线15的长度值，从而判断第一记忆合金线14和第二记忆合金线15是否缩短，以及缩短量是多少，反过来控制通入第一记忆合金线14和第二记忆合金线15的电流的大小，从而将镜头13较为精确地拉回初始位置。
作为本实施例的一种改进方式，镜头组件100还包括两个第一接线端子16和两个第二接线端子17，两个第一接线端子16中的一个与第一侧板112远离第一底板111的一侧连接、另一个与镜头13靠近第二侧板113的一侧连接，第一记忆合金线14的两端分别与两个第一接线端子16连接；两个第二接线端子17中的一个与第二侧板113远离第一底板111的一侧连接、另一个与镜头13靠近第一侧板112的一侧连接，第二记忆合金线15的两端分别与两个第二接线端子17连接。通过设置第一接线端子16和第二接电端子17，一方面便于第一记忆合金线14与第一侧板112、第二记忆合金线15与第二侧板113的连接，另一方面便于第一记忆合金线14和第二记忆合金线15与外接电源线的连接。
可以理解地，镜头组件100不设置有第一接线端子16和第二接电端子17也是可以的，第一记忆合金线14和第二记忆合金线15可以通过其他连接的方式固定在镜头13与第一侧板112、第二侧板113之间。
作为本实施例的一种改进方式，镜头组件10还包括设置于镜头13与第一基座11之间的第一滚珠18。通过设置第一滚珠18可以减小镜头13在第一侧板112、第二侧板113之间移动时的摩擦力，使得镜头13的移动更为平滑，光学防抖反应更为灵敏。
作为本实施例的一种改进方式，第一侧板112和第二侧板113上都设置有第一凹槽115，镜头13相对的两侧反向凸设有第一凸出部131，两个第一凸出部131分别嵌设于两个第一凹槽115中，每个第一凹槽115包括沿光轴S方向间隔设置的第一侧面116、第二侧面117，每个第一凸出部131包括与第一侧面116相对设置的第一表面132和与第二侧面117相对设置的第二表面133，第一侧面116凹设有第一导槽118，第一表面132凹设有与第一导槽118对位设置的第二导槽134，第一导槽118和第二导槽134之间嵌设至少一个第一滚珠18。第一导槽118垂直于光轴S的方向并与第一底板111平行设置。
作为本实施例的一种改进方式，第一导槽118设有两个，两个第一导槽118在垂直于第一底板111的方向上平行间隔设置。第二导槽134设有两个，两个第二导槽134在垂直于第一底板111的方向上平行间隔设置，两个第二导槽134分别与两个第一导槽118对位设置，每组第一导槽118和第二导槽134之前嵌设至少一个第一滚珠18。通过设置两组第一导槽118、第二导槽134，使得镜头13的运行更为平稳。
作为本实施例的一种改进方式，第一凸出部131于第二表面133所在侧设有第一磁钢135，第一凹槽115于第二侧面117处设有与第一磁钢135正对设置以用于与第一磁钢135磁力吸附的第二磁钢119。第一磁钢135和第二磁钢119主要用于配合第一记忆合金线14或第二记忆合金线15将偏移的镜头13复位到初始位置。初始时，镜头13未发生偏移，第一磁钢135与第二磁钢119正对位设置，当镜头13发生偏移时，例如，当镜头13向第二侧板113发生偏移时，第一记忆合金线14被拉长，第一磁钢135和第二磁钢119发生错位，第一记忆合金线14通电收缩，同时配合第一磁钢135和第二磁钢119之间相互的磁力作用将镜头13复位到初始位置。
请参阅图1、4-9，作为本实施例的一种改进方式，镜头组件100还包括第二基座19、第三记忆合金线20、第四记忆合金线21以及一对复位结构22，第一基座11沿平行于镜头13的光轴S的方向可滑动安装于第二基座19，第二基座19包括第二底板191、自第二底板191弯折延伸且位于第一侧板112外侧的第三侧板192以及自第二底板191弯折延伸且位于第二侧板113外侧的第四侧板193。第三记忆合金线20沿平行于光轴S方向延伸且两端分别与第一侧板112、第三侧板192连接，第四记忆合金线21沿光轴S方向延伸且两端分别与第二侧板113、第四侧板193连接第一侧板112与第三侧板192之间和第二侧板113与第四侧板193之间均设有复位结构22，该复位结构22用于将偏移的第一基座11和镜头13复位至初始位置。
初始时，第一基座11位于第二基座19的初始位置，即镜头13位于预设的初始位置。对焦时，往第三记忆合金丝20和第四记忆合金丝21中通入电流，第三记忆合金丝20和第四记忆合金丝21发热，长度发生收缩从而拉动第一基座11相对于第二基座13沿镜头13的光轴S的方向位移，实现镜头13的对焦。完成对焦后，断开电流，复位结构将镜头13随第一基座11复位至初始位置。
相对于现有技术而言，本实施例通过设置第三记忆合金线20和第四记忆合金线21通电发生形变配合复位结构20带动第一基座11，也即带动镜头13沿光轴S方向移动以实现镜头13的自动对焦，不需要传统的采用音圈与磁钢相互作用的方式进行驱动，没有磁场干扰问题，稳定性较高，而且该驱动的设置方式，结构简单，安装方便，不需要额外增加霍尔元件，在特殊环境下使用可靠性高。而且相对于现有的采用磁铁配合防抖线圈的防抖结构，本实施例中采用第三记忆合金线20和第四记忆合金线21能够明显地降重和降低成本；此外，相对于现有的采用磁铁配合防抖线圈的防抖结构，本实施例中采用的第三记忆合金线20和第四记忆合金线21只要通入少量的电流即可以拉动第一基座11位移，起到自动对焦的效果，有效降低了功耗。
为方便描述，将第一基座11的第一侧板112和第二侧板113统称为第一侧臂11a，将第二基座19的第三侧板192和第四侧板193统称为第二侧臂19a，从而第一基座11包括第一底板111和自第一底板111弯折延伸且分别位于镜头13两侧的第一侧臂11a，第二基座19包括第二底板191和自第二底板191弯折延伸且分别位于第一侧臂11a外侧的第二侧臂19a，第一侧臂11a包括与第二侧臂19a相对的第一板体101和自第一板体101远离第一底板112一端弯折延伸且位于第二侧臂19a上方的第二板体102；镜头13的两侧各设置一个复位结构22，复位结构22包括设置于第二侧臂19a与第二板体102之间的磁钢组件23、设置于第一板体101与第二侧臂19a之间的引导结构24、以及沿平行于光轴S的方向设置于第一侧臂11a与第二侧臂19a之间的弹性件25。本实施例中，通过设置弹性件25配合磁钢组件23拉动偏移的第一基座11在引导结构24的引导下复位到初始位置，相对于传统的使用音圈电机的方式，该设计方式的复位结构22结构简单，而且通过设置磁钢组件23设置于第二侧臂19a与第二板体102之间，引导结构24设置于第一板体101与第二侧臂19a之间，弹性件25沿平行于光轴S的方向设置于第一侧臂11a与第二侧臂19a之间，复位结构22、第一基座11、第二基座19以及镜头13形成的整体的结构非常的紧凑，使得镜头组件100整体的尺寸可以做小，实现小型化设计。
作为本实施例的一种改进方式，磁钢组件23沿垂直于光轴S方向的投影位于弹性件25上。
作为本实施例的一种改进方式，引导结构24在垂直于镜头13的光轴S的方向上位于弹性件25与磁钢组件23之间。
作为本实施例的一种改进方式，第一侧臂11a还包括自第一板体101沿光轴S方向远离镜头13物侧的一端弯折延伸的第三板体103，第一板体101、第二板体102及第三板体103形成收容第二侧臂19a的凹陷部26。
作为本实施例的一种改进方式，第二侧臂19a包括与第二底板191连接的第一连接部104、与第一连接部104间隔且相对设置的第二连接部105、以及与第一连接部104远离第三板体103一侧和第二连接部105远离第三板体103一侧连接的第三连接部106，弹性件25的一端与第三板体103连接、另一端与第三连接部106连接。
作为本实施例的一种改进方式，第二侧臂19a与第二板体102之间设有两个间隔设置的磁钢组件23。
作为本实施例的一种改进方式，各所述磁钢组件23包括设置于第二侧臂19a朝向第二板体102一侧的第一磁钢231和设置于第二板体102朝向第二侧臂19a一侧并与第一磁钢231正对设置的第二磁钢232。镜头13位于初始位置时，第一磁钢231和第二磁钢232正对设置，第三记忆合金线20和第四记忆合金线21拉动第一基座11相对于第二基座19位移时，第一磁钢231与第二磁钢232发生错位, 第三记忆合金线20和第四记忆合金线21断电后，第一磁钢231和第二磁钢232通过磁力作用，并配合弹性件25弹性力的作用将第一基座11和镜头13复位至初始位置。
作为本实施例的一种改进方式，第二侧臂19a朝向第二板体102的一侧设有第一容置槽195，第一磁钢231嵌设于第一容置槽195中，第二板体102朝向第二侧臂19a一侧凹设有第二容置槽107，第二磁钢嵌232设于第二容置槽107中。通过设置第一容置槽195收容第一磁钢231，设置第二容置槽107收容第二磁钢232，能够实现镜头组件100空间的合理利用，使得结构更为紧凑。
作为本实施例的一种改进方式，第二侧臂19a与第一板体101之间设有两个间隔设置的引导结构24。具体地各所述引导结构24包括沿光轴S方向凹设于第一板体101朝向第二侧臂19a的表面的第一导槽241，设于第二侧臂19a朝向第一板体101的表面用于与第一导槽241配合形成引导通道的承靠部242、以及夹设于第一导槽241与承靠部242之间的第二滚珠243。通过在磁钢组件23的两侧都设置有引导结构24可以减小第二侧臂19a与第一板体101相对滑动时的摩擦力，使得第一基座11的偏移和复位更为灵敏。
作为本实施例的一种改进方式，位于与第三记忆合金线20同一侧的弹性件25沿垂直于光轴S方向的投影位于第三记忆合金线20上；位于与第四记忆合金线21同一侧的弹性件25沿垂直于光轴S方向的投影位于第四记忆合金线21上。
作为本实施例的一种改进方式，镜头组件100还包括两个第三接线端子27和两个第四接线端子28，两个第三接线端子27分别安装在第一侧臂11a和第二侧臂19a上，第三记忆合金线20的两端分别与两个第三接线端子27连接；两个第四接线端子28分别安装在第一侧臂11a和第二侧臂19a上，第四记忆合金线21的两端分别与两个第四接线端子28连接。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (11)

  1. 一种自动对焦镜头组件，其特征在于，包括镜头、第一基座、第二基座以及一对复位结构，所述镜头位于所述第一基座中，所述第一基座沿平行于所述镜头的光轴的方向可滑动安装于所述第二基座；所述第一基座包括第一底板和自所述第一底板弯折延伸且分别位于所述镜头两侧的第一侧臂，所述第二基座包括第二底板和自所述第二底板弯折延伸且分别位于所述第一侧臂外侧的第二侧臂，所述第一侧臂包括与所述第二侧臂相对的第一板体和自所述第一板体远离所述第一底板一端弯折延伸且位于所述第二侧臂上方的第二板体；所述镜头的两侧各设置一个所述复位结构，所述复位结构包括设置于所述第二侧臂与所述第二板体之间的磁钢组件、设置于所述第一板体与所述第二侧臂之间的引导结构、以及沿平行于光轴的方向设置于所述第一侧臂与所述第二侧臂之间的弹性件。
  2. 根据权利要求1所述的自动对焦镜头组件，其特征在于，所述磁钢组件沿垂直于光轴方向的投影位于所述弹性件上。
  3. 根据权利要求1所述的自动对焦镜头组件，其特征在于，所述引导结构在垂直于所述镜头的光轴的方向上位于所述弹性件与所述磁钢组件之间。
  4. 根据权利要求1所述的自动对焦镜头组件，其特征在于，所述第一侧臂还包括自所述第一板体沿光轴方向远离镜头物侧的一端弯折延伸的第三板体，所述第一板体、第二板体及第三板体形成收容所述第二侧臂的凹陷部。
  5. 根据权利要求4所述的自动对焦镜头组件，其特征在于，所述第二侧臂包括与所述第二底板连接的第一连接部、与所述第一连接部间隔且相对设置的第二连接部、以及与所述第一连接部远离所述第三板体一侧和所述第二连接部远离所述第三板体一侧连接的第三连接部，所述弹性件的一端与所述第三板体连接、另一端与所述第三连接部连接。
  6. 根据权利要求1所述的自动对焦镜头组件，其特征在于，所述第二侧臂与所述第二板体之间设有两个间隔设置的所述磁钢组件。
  7. 根据权利要求6所述的自动对焦镜头组件，其特征在于，各所述磁钢组件包括设置于所述第二侧臂朝向所述第二板体一侧的第一磁钢和设置于所述第二板体朝向所述第二侧臂一侧并与所述第一磁钢正对设置的第二磁钢。
  8. 根据权利要求7所述的自动对焦镜头组件，其特征在于，第二侧臂朝向所述第二板体的一侧设有第一容置槽，所述第一磁钢嵌设于所述第一容置槽中，所述第二板体朝向所述第二侧臂一侧凹设有第二容置槽，所述第二磁钢嵌设于所述第二容置槽中。
  9. 根据权利要求1所述的自动对焦镜头组件，其特征在于，所述第二侧臂与所述第一板体之间设有两个间隔设置的所述引导结构。
  10. 根据权利要求9所述的自动对焦镜头组件，其特征在于，各所述引导结构包括沿光轴方向凹设于所述第一板体朝向所述第二侧臂的表面的第一导槽，设于所述第二侧臂朝向所述第一板体的表面用于与所述第一导槽配合形成引导通道的承靠部、以及夹设于所述第一导槽与所述承靠部之间的滚珠。
  11. 根据权利要求1-10任一项所述的自动对焦镜头组件，其特征在于，所述自动对焦镜头组件还包括为所述镜头实现自动对焦的记忆合金线，所述记忆合金线的一端固定于所述第一基座、另一端固定于所述第二基座，所述弹性件沿垂直于光轴方向的投影位于所述记忆合金线上。
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