WO2022088343A1 - 镜头驱动装置 - Google Patents
镜头驱动装置 Download PDFInfo
- Publication number
- WO2022088343A1 WO2022088343A1 PCT/CN2020/131913 CN2020131913W WO2022088343A1 WO 2022088343 A1 WO2022088343 A1 WO 2022088343A1 CN 2020131913 W CN2020131913 W CN 2020131913W WO 2022088343 A1 WO2022088343 A1 WO 2022088343A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shake
- driving
- coil
- optical axis
- magnetic steel
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 75
- 239000010959 steel Substances 0.000 claims abstract description 75
- 230000003287 optical effect Effects 0.000 claims abstract description 62
- 239000000725 suspension Substances 0.000 claims abstract description 26
- 238000004804 winding Methods 0.000 claims description 11
- 230000005415 magnetization Effects 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000005672 electromagnetic field Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
Definitions
- the utility model relates to a driving device, in particular to a lens driving device.
- lens driving devices are widely used in various imaging devices.
- the driving mechanism of the lens driving device of the related art is usually composed of a coil and a magnetic steel to form a driving structure, the supporting frame is supported on the base, and the driving coil and the driving magnetic
- the lens barrel is supported on the support frame by shrapnel;
- the OIS coil anti-shake coil
- the driving coil and the driving magnetic steel generate an electromagnetic field, and the driving coil is subjected to the Lorentz force of the electromagnetic field to drive the driving magnetic steel to move linearly along the optical axis direction of the lens barrel, thereby driving the lens barrel to move along the optical axis direction;
- the anti-shake coil When the current is applied, the anti-shake coil and the anti-shake magnet generate an electromagnetic field, and the anti-shake coil is acted by the Lorentz force of the electromagnetic field, which drives the anti-shake magnet to move in the direction perpendicular to the optical axis,
- the anti-shake coil and the anti-shake magnetic steel are arranged on the bracket frame and the housing along the optical axis direction, so that the thickness of the lens driving device along the optical axis direction is increased, and the components are not miniaturized. Increased assembly complexity.
- a Hall sensor needs to be added to detect the shaking position of the lens barrel.
- the Hall sensor, the drive coil, and the anti-shake coil need to be provided with a multi-layer circuit board to realize signal transmission, and the multi-layer circuit board installation increases the production cost.
- the technical problem to be solved by the present invention is to provide a lens driving device with small thickness, simple assembly, and reduced production cost.
- the present invention provides a lens driving device, which includes a base;
- the support frame has a receiving space, and the support frame is supported on the base;
- the casing is covered on the base and the support frame is located in the casing;
- the lens barrel is accommodated in the accommodating space and used for installing the lens group;
- an upper elastic piece one end of the upper elastic piece is fixed to the top of the support frame along the optical axis direction of the lens barrel, and the other end is fixed to the top of the lens barrel along the optical axis direction;
- the upper elastic piece is provided with a conductive path;
- one end of the lower elastic sheet is fixed to the bottom end of the support frame along the optical axis direction, and the other end is fixed to the bottom end of the lens barrel along the optical axis direction; the upper elastic sheet and the The lower elastic pieces together elastically support the lens barrel in the receiving space; and,
- an anti-shake suspension wire a driving coil, an anti-shake coil, a magnetic steel, a flexible circuit board and a Hall sensor accommodated in the casing;
- the anti-shake suspension wire is made of metal conductive material, which includes a plurality of them and is arranged around the support frame at intervals. One end of each anti-shake suspension wire is fixed on the base, and the other end is fixed on the upper Shrapnel and form electrical connection;
- the magnetic steel is unipolar magnetized, including a first driving magnetic steel fixed on opposite sides of the support frame along a direction perpendicular to the optical axis, and a second driving magnetic steel fixed on the other opposite sides of the support frame. magnetic steel;
- the driving coil is sleeved and fixed on the outer circumference of the lens barrel and is spaced from the magnetic steel, the driving coil is electrically connected with the upper elastic sheet, and the magnetization direction of the magnetic steel is related to the winding of the driving coil.
- the line plane is parallel and drives the driving coil to move along the optical axis direction;
- the anti-shake coil is formed by pre-winding, and the winding plane of the anti-shake coil is parallel to the optical axis direction.
- the second anti-shake coil is located within the magnetic field range of the first driving magnetic steel and drives the first driving magnetic steel to move in a first direction perpendicular to the optical axis direction;
- the second anti-shake coil is located in the second driving magnetic steel within the range of the magnetic field and drive the second driving magnetic steel to move in a second direction perpendicular to the optical axis direction; wherein, the first direction and the second direction are perpendicular to each other;
- the hall sensor is fixed on the base to detect the displacement of the lens barrel in the first direction and the second direction;
- the flexible circuit board includes a driving circuit board and an anti-shake circuit board, the driving circuit board is attached to the base and is electrically connected with the Hall sensor, and the upper elastic sheet is connected with the anti-shake suspension wire through the anti-shake suspension wire.
- the driving circuit board is electrically connected; the anti-shake circuit board is attached to the casing, and the anti-shake coil is fixed on the anti-shake circuit board and is electrically connected with the anti-shake circuit board.
- the upper elastic pieces include two and respectively suspend the lens barrel in the receiving space, the two upper elastic pieces are mutually insulated and arranged to form a ring together, and each of the upper elastic pieces forms a the conductive path.
- the two upper elastic pieces are centrally symmetrically arranged with respect to the lens barrel.
- the support frame has a rectangular structure
- the anti-shake suspension wires include four and are respectively arranged at four corners of the support frame.
- the driving circuit board is bent and extended from the base to the outside of the casing to form a driving pin portion
- the anti-shake circuit board is bent and extended from the base to the outside of the casing to form an anti-shake circuit board. Shake the pin part.
- the driving pin portion and the anti-shake pin portion are respectively located on opposite sides of the base.
- the anti-shake coil is formed by pre-winding, and the winding plane of the anti-shake coil is parallel to the direction of the optical axis.
- the magnetization direction of each of the magnetic steels is perpendicular to the direction of the optical axis.
- a plurality of magnetic steels are respectively fixed on the peripheral side of the support frame, and the magnetic steels are divided into a first driving magnetic steel and a second driving magnetic steel, and each magnetic steel is a Monopolar magnetization, the driving coil is sleeved and fixed on the outside of the lens barrel and is spaced from the magnetic steel. All the magnetic steel drives the driving coil to move along the optical axis direction of the lens barrel, and provides restoring force through the upper and lower spring pieces to drive the coil.
- the anti-shake coil is fixed on the casing, and the first anti-shake coil is located within the magnetic field range of the first driving magnetic steel and drives the first driving magnetic
- the steel moves in the first direction perpendicular to the optical axis direction, and provides restoring force through the anti-shake suspension wire to realize the anti-shake (OIS-X) function in the horizontal X direction
- the second anti-shake coil is located in the second driving magnetic steel.
- the anti-shake suspension wire provides restoring force to realize the anti-shake (OIS-Y) function in the horizontal Y direction.
- the magnetic steel acts with the anti-shake coil and the driving coil due to unipolar magnetization, thereby reducing the number of magnetic steel and simplifying the assembly process;
- the anti-shake coil is surrounded by the support frame along the direction perpendicular to the optical axis and fixed
- the housing while realizing the anti-shake function, it avoids occupying the space along the optical axis of the lens driving device, effectively reduces the thickness of the lens driving device along the optical axis, and simplifies the assembly method.
- the anti-shake coil for OIS drive greatly reduces the production cost.
- the drive circuit board is electrically connected with the Hall sensor and the drive coil to draw out signals.
- the anti-shake circuit board and the anti-shake coil are electrically connected to draw out signals.
- the double FPC structure makes the assembly simple, compared to multi-layer circuits. The structure of the board to pull out the signal has a lower production cost.
- FIG. 1 is a three-dimensional schematic diagram of a lens driving device of the present invention
- FIG. 2 is a schematic diagram of a partially exploded structure of the lens driving device of the present invention.
- FIG. 3 is a schematic exploded view of another part of the structure of the lens driving device of the present invention.
- FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 1 .
- FIG. 1 is a schematic three-dimensional structure diagram of the lens driving device of the present invention
- FIG. 2 is a partial exploded structural schematic diagram of the lens driving device of the present invention
- FIG. 3 is a schematic diagram of the lens driving device of the present invention. Another part of the exploded schematic diagram of the structure
- FIG. 4 is a cross-sectional view along the line A-A in FIG. 1 .
- the utility model provides a lens driving device 100, which comprises a base 1, a supporting frame 2, a casing 3, a lens barrel 4, an upper elastic piece 5, a lower elastic piece 6, an anti-shake suspension wire 7, a driving coil 8, and an anti-shake coil 9 , magnetic steel 10 , flexible circuit board 11 and Hall sensor 12 .
- the support frame 2 has a receiving space 20 , and the support frame 2 is supported on the base 1 .
- the casing 3 is covered on the base 1 so that the supporting frame 2 is located in the casing 3 .
- the lens barrel 4 , the upper elastic piece 5 , the lower elastic piece 6 , the anti-shake suspension wire 7 , the driving coil 8 , the anti-shake coil 9 , the magnetic steel 10 , the flexible circuit board 11 and the Hall sensor 12 are all accommodated in the housing 3 .
- the lens barrel 4 is accommodated in the accommodating space 20 for installing the lens group.
- the upper elastic sheet 5 is provided with a conductive path for realizing the transmission of electrical signals.
- the upper elastic sheet 5 is an FPC, and the conductive path is realized by a conductive circuit on the FPC.
- the upper elastic pieces 5 include two and respectively suspend the lens barrel 4 in the receiving space 20 .
- the two upper elastic pieces 5 are insulated from each other and form a ring together.
- the upper elastic sheet 5 forms a conductive path, so as to realize the transmission of positive and negative poles of electrical signals.
- the two upper elastic pieces 5 are arranged symmetrically with respect to the lens barrel 4 in the center.
- the two upper elastic pieces 5 can also be an integral structure, and it is only necessary to insulate the two conductive paths from each other, which is easy to think.
- One end of the lower elastic piece 6 is fixed to the bottom end of the support frame 2 along the optical axis direction, and the other end is fixed to the bottom end of the lens barrel 4 along the optical axis direction.
- the upper elastic piece 5 and the lower elastic piece 6 together elastically support the lens barrel 4 in the accommodating space 20, and are used to provide a restoring force to the lens barrel when the auto-focus (AF) function is performed;
- the anti-shake suspension wires 7 are made of metal conductive material, and include a plurality of wires and are respectively arranged around the support frame 2 at intervals. One end of each of the anti-shake suspension wires 7 is fixed to the base 1 , and the other end is fixed to the upper elastic piece 5 and is electrically connected with the upper elastic piece 5 .
- the anti-shake suspension wire 7 is used to provide the restoring force to the support frame 2 when the anti-shake (OIS) function is provided.
- the support frame 2 has a rectangular structure
- the anti-shake suspension wires 7 include four and are respectively disposed at four corners of the support frame 2 to improve stability and reliability.
- the magnetic steel 10 includes a first driving magnetic steel 101 fixed to opposite sides of the support frame 2 along a direction perpendicular to the optical axis, and a second driving magnetic steel fixed to the other opposite sides of the support frame 2 . 102 , each of the magnetic steel 10 is magnetized with a single pole. As shown in FIG. 4 , only a single magnetic pole is provided on opposite sides of the magnetic steel 10 .
- the driving coil 8 is sleeved and fixed on the outer circumference of the lens barrel 4 and is spaced from the magnetic steel 10 .
- the driving coil 8 is electrically connected with the upper elastic piece 5 , and the magnetic steel 10 is used to drive the
- the driving coil 8 moves along the optical axis direction (Z-axis direction), and the driving coil 8 drives the lens barrel 4 to move along the optical axis direction to realize the automatic focusing (AF) function.
- the magnetization direction of the magnetic steel 10 is parallel to the winding plane of the driving coil 8 .
- each of the magnetic steels 10 may also be perpendicular to the optical axis direction.
- the anti-shake coil 9 includes a first anti-shake coil 91 fixed to the housing 3 and spaced apart from the first driving magnet 101 , and a first anti-shake coil 91 fixed to the housing 3 and spaced from the second driving magnet 102 .
- the opposite second anti-shake coil 92 . That is, the first anti-shake coil 91 and the second anti-shake coil 92 are arranged on the support frame 2 at intervals along the radial direction of the lens barrel 4, and the structure is arranged so that the anti-shake coil 9 does not occupy the lens driving device 100 along the optical axis (Z-axis direction). ) space, effectively reducing the thickness of the lens driving device 100 along the optical axis direction, which is beneficial to the thinning requirement of the product, simplifies the assembly method, and improves the assembly efficiency.
- the first anti-shake coil 91 is located within the magnetic field range of the first driving magnetic steel 101 and drives the first driving magnetic steel 101 to move in a first direction perpendicular to the optical axis direction; the second anti-shake coil 91
- the shaking coil 92 is located within the magnetic field range of the second driving magnetic steel 102 and drives the second driving magnetic steel 102 to move in a second direction perpendicular to the optical axis direction; wherein the first direction and the The second directions are perpendicular to each other.
- the first direction is defined as the X-axis direction
- the second direction is defined as the Y-axis direction.
- the anti-shake coil 9 is formed by pre-winding, and the plane where the winding direction of the anti-shake coil 9 is located is parallel to the optical axis direction.
- the anti-shake driving method formed by this structure is compared with the prior art. The cost of the anti-shake driving method of the middle and multi-layer circuit board structure can be greatly reduced.
- the Hall sensor 12 is fixed to the base 1 for detecting the displacement of the lens barrel 4 in the first direction (X-axis direction) and the second direction (Y-axis direction).
- the flexible circuit board 11 includes a driving circuit board 111 and an anti-shake circuit board 112 .
- the driving circuit board 111 is attached to the base 1 and is electrically connected to the Hall sensor 12 , and the upper elastic sheet 5 is electrically connected to the driving circuit board 111 through the anti-shake suspension wire 7 . That is to say, the driving coil 8 is electrically connected to the driving circuit board 111 through the upper elastic piece 5 and the anti-shake suspension wire 7 in turn, so as to transmit the signal for realizing the AF function.
- the anti-shake circuit board 112 is attached to the casing 3 , and the anti-shake coil 9 is fixed to the anti-shake circuit board 112 and is electrically connected to the anti-shake circuit board 112 for transmission to realize the OIS function. signal of.
- the arrangement of the above-mentioned dual circuit board (FPC) structure makes the assembly method simple, and the production cost is lower compared to the structure of the multi-layer circuit board for drawing out signals.
- the driving circuit board 111 is bent and extended from the base 1 to the outside of the casing 3 to form a driving pin portion 111a, which is used to connect the signal for realizing the AF function;
- the anti-shake circuit board 112 is bent and extended from the base 1 to the outside of the housing 3 to form an anti-shake pin portion 112a, which is used to connect the signal for realizing the OIS function.
- the driving pin portion 111a and the anti-shake pin portion 112a are located on opposite sides of the base 1 respectively, so that it is more convenient to connect external signal lines.
- a plurality of magnetic steels are respectively fixed on the peripheral side of the support frame, and the magnetic steels are divided into a first driving magnetic steel and a second driving magnetic steel, and each magnetic steel is a Monopolar magnetization, the driving coil is sleeved and fixed on the outside of the lens barrel and is spaced from the magnetic steel. All the magnetic steel drives the driving coil to move along the optical axis direction of the lens barrel, and provides restoring force through the upper and lower spring pieces to drive the coil.
- the anti-shake coil is fixed on the casing, and the first anti-shake coil is located within the magnetic field range of the first driving magnetic steel and drives the first driving magnetic
- the steel moves in the first direction perpendicular to the optical axis direction, and provides restoring force through the anti-shake suspension wire to realize the anti-shake (OIS-X) function in the horizontal X direction
- the second anti-shake coil is located in the second driving magnetic steel.
- the anti-shake suspension wire provides restoring force to realize the anti-shake (OIS-Y) function in the horizontal Y direction.
- the magnetic steel acts with the anti-shake coil and the driving coil due to unipolar magnetization, thereby reducing the number of magnetic steel and simplifying the assembly process;
- the anti-shake coil is surrounded by the support frame along the direction perpendicular to the optical axis and fixed
- the housing while realizing the anti-shake function, it avoids occupying the space along the optical axis of the lens driving device, effectively reduces the thickness of the lens driving device along the optical axis, and simplifies the assembly method.
- the anti-shake coil for OIS drive greatly reduces the production cost.
- the drive circuit board is electrically connected with the Hall sensor and the drive coil to draw out signals.
- the anti-shake circuit board and the anti-shake coil are electrically connected to draw out signals.
- the double FPC structure makes the assembly simple, compared to multi-layer circuits. The structure of the board to pull out the signal has a lower production cost.
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Abstract
一种镜头驱动装置，每一磁钢（10）为单极充磁，驱动线圈（8）套设于镜筒（4）外侧并与磁钢（10）间隔，磁钢（10）驱动驱动线圈（8）沿镜筒（4）的光轴方向移动，并通过上弹片（5）与下弹片（6）提供回复力，驱动线圈（8）带动镜筒（4）沿光轴方向正、负向移动，实现自动调焦(AF)功能；防抖线圈（9）固定于外壳（3）沿垂直于光轴方向的周侧，第一防抖线圈（91）驱动第一驱动磁钢（101）沿垂直于光轴方向的第一方向移动，通过防抖悬丝（7）提供回复力，实现水平X方向的防抖功能；第二防抖线圈（92）驱动第二驱动磁钢（102）沿垂直于光轴方向的第二方向移动，通过防抖悬丝（7）提供回复力，实现水平Y方向的防抖功能。镜头驱动装置厚度尺寸小且装配简单，生产成本低。
Description
本实用新型涉及一种驱动装置，尤其涉及一种镜头驱动装置。
随着摄像技术的发展，镜头驱动装置在各种摄像装置中得到广泛的应用。镜头驱动装置与各种便携式电子设备比如手机、摄像机、电脑等的结合，更是得到消费者的青睐。
相关技术的所述镜头驱动装置的驱动机构通常是由线圈和磁钢组配形成驱动结构，支撑框架支撑于座底上，驱动线圈和驱动磁钢分别固定在镜筒和支撑框架上，将所述镜筒通过弹片支撑于支撑框架；OIS线圈（防抖线圈）固定于外壳并位于支撑框架上方，防抖磁钢固定于所述支撑框架远离底座的一侧；当所述驱动线圈施加电流时，驱动线圈与驱动磁钢产生电磁场，驱动线圈受到电磁场的洛伦兹力的作用，驱动该驱动磁钢沿镜筒的光轴方向直线运动，从而带动镜筒沿光轴方向移动；防抖线圈施加电流时，防抖线圈与防抖磁钢产生电磁场，防抖线圈受到电磁场的洛伦兹力的作用，驱动该防抖磁钢沿垂直于光轴方向运动，从而带动镜筒实现OIS防抖性能。
然而，相关技术的所述镜头驱动装置中，防抖线圈和防抖磁钢沿光轴方向设置于支架框架和外壳，使得镜头驱动装置沿光轴方向的厚度增加，不利用微型化，而且组件多增加了装配复杂性。同时，需要增加霍尔传感器检测镜筒的抖动位置，霍尔传感器、驱动线圈、防抖线圈需要设置多层线路板实现信号传送，而多层线路板的设置增加生产成本。
因此，有必要提供一种新的镜头驱动装置来解决上述问题。
本实用新型要解决的技术问题是提供一种厚度尺寸小且装配简单、降低生产成本的镜头驱动装置。
为解决上述技术问题，本实用新型提供了一种镜头驱动装置，其包括底座；
支撑框架，所述支撑框架具有收容空间，所述支撑框架支撑于所述底座；
外壳，所述外壳盖设于所述底座并使得所述支撑框架位于所述外壳内；
镜筒，所述镜筒收容于所述收容空间内，用于安装镜片组；
上弹片，所述上弹片一端沿所述镜筒的光轴方向固定于所述支撑框架的顶端，另一端沿所述光轴方向固定于所述镜筒的顶端；所述上弹片设有导电通路；
下弹片，所述下弹片的一端沿所述光轴方向固定于所述支撑框架的底端，另一端沿所述光轴方向固定于所述镜筒的底端；所述上弹片和所述下弹片共同将所述镜筒弹性支撑于所述收容空间内；以及，
收容于所述外壳内的防抖悬丝、驱动线圈、防抖线圈、磁钢、柔性线路板以及霍尔传感器；
所述防抖悬丝为金属导电材料制成，其包括多根且分别间隔环绕所述支撑框架设置，每一所述防抖悬丝的一端固定于所述底座，另一端固定于所述上弹片并形成电性连接；
所述磁钢为单极充磁，包括沿垂直于所述光轴方向分别固定于所述支撑框架相对两侧的第一驱动磁钢和固定于所述支撑框架另外相对两侧的第二驱动磁钢；
所述驱动线圈套设固定于所述镜筒的外周并与所述磁钢间隔，所述驱动线圈与所述上弹片电性连接，所述磁钢的充磁方向与所述驱动线圈的绕线平面平行并驱动所述驱动线圈沿所述光轴方向运动；
所述防抖线圈为预绕制形成，且所述防抖线圈的绕线平面与所述光轴方向平行，其包括固定于所述外壳并与所述第一驱动磁钢沿垂直于所述光轴方向间隔相对的第一防抖线圈和固定于所述外壳并与所述第二驱动磁钢沿垂直于所述光轴方向间隔相对的第二防抖线圈，所述第一防抖线圈位于所述第一驱动磁钢的磁场范围内并驱动所述第一驱动磁钢沿垂直于所述光轴方向的第一方向移动；所述第二防抖线圈位于所述第二驱动磁钢的磁场范围内并驱动所述第二驱动磁钢沿垂直于所述光轴方向的第二方向移动；其中，所述第一方向与所述第二方向相互垂直；
所述霍尔传感器固定于所述底座用以检测所述镜筒在所述第一方向和所述第二方向的位移；
所述柔性线路板包括驱动线路板和防抖线路板，所述驱动线路板贴设于所述底座并与所述霍尔传感器形成电性连接，所述上弹片通过所述防抖悬丝与所述驱动线路板形成电性连接；所述防抖线路板贴设于所述外壳，所述防抖线圈固定于所述防抖线路板并与所述防抖线路板形成电性连接。
优选的，所述上弹片包括两个且分别将所述镜筒悬置于所述收容空间内，两个所述上弹片相互绝缘设置且共同围成环状，每一所述上弹片形成一所述导电通路。
优选的，两个所述上弹片相互之间关于所述镜筒呈中心对称设置。
优选的，所述支撑框架呈矩形结构，所述防抖悬丝包括四个且分别设置于所述支撑框架的四个角的位置。
优选的，所述驱动线路板由所述底座处弯折延伸至所述外壳外部以形成驱动引脚部，所述防抖线路板由所述底座处弯折延伸至所述外壳外部以形成防抖引脚部。
优选的，所述驱动引脚部与所述防抖引脚部分别位于所述底座的相对两侧。
优选的，防抖线圈为预绕制形成，并且所述防抖线圈的绕线平面与所述光轴方向平行。
优选的，每一所述磁钢的充磁方向均垂直于所述光轴方向。
与相关技术相比，本实用新型镜头驱动装置中，将多个磁钢分别固定于支撑框架周侧，且磁钢分为第一驱动磁钢和第二驱动磁钢，且每一磁钢为单极充磁，驱动线圈套设固定于镜筒外侧并与磁钢间隔，所有磁钢驱动所述驱动线圈沿镜筒的光轴方向移动，并通过上弹片与下弹片提供回复力，驱动线圈带动镜筒沿光轴方向正、负向移动，实现自动调焦（AF）功能；防抖线圈固定于外壳，第一防抖线圈位于第一驱动磁钢的磁场范围内并驱动第一驱动磁钢沿垂直于所述光轴方向的第一方向移动，通过防抖悬丝提供回复力，实现水平X方向的防抖（OIS-X）功能；第二防抖线圈位于第二驱动磁钢的磁场范围内并驱动第二驱动磁钢沿垂直于光轴方向的第二方向移动，通过防抖悬丝提供回复力，实现水平Y方向的防抖（OIS-Y）功能。上述结构中，磁钢因单极充磁，同时与防抖线圈及驱动线圈作用，从而减少了磁钢的数量，简化了装配工艺；防抖线圈沿垂直于光轴方向环绕于支撑框架并固定于外壳，在实现防抖功能的同时，避免了占用镜头驱动装置沿光轴上的空间，有效的减小了镜头驱动装置沿光轴方向的厚度，且简化了装配方式，且预绕制的防抖线圈进行OIS驱动相比于传统的多层电路板驱动而言，较大程度的降低了生产成本。驱动线路板与霍尔传感器及驱动线圈电连接用以引出信号，所述防抖线路板与防抖线圈形成电性连接用以引出信号，双FPC结构设置使得装配简单，相较于多层电路板引出信号的结构其生产成本更低。
为了更清楚地说明本实用新型实施例中的技术方案，下面将对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实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本实用新型镜头驱动装置的立体结构示意图；
图2为本实用新型镜头驱动装置的部分分解结构示意图；
图3为本实用新型镜头驱动装置的另一部分结构分解示意图；
图4为沿图1中A-A线的剖示图。
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本实用新型的一部分实施例，而不是全部的实施例。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它实施例，都属于本实用新型保护的范围。
请参阅图1-4所示，其中，图1为本实用新型镜头驱动装置的立体结构示意图；图2为本实用新型镜头驱动装置的部分分解结构示意图；图3为本实用新型镜头驱动装置的另一部分结构分解示意图；图4为沿图1中A-A线的剖示图。本实用新型提供了一种镜头驱动装置100，其包括底座1、支撑框架2、外壳3、镜筒4、上弹片5、下弹片6、防抖悬丝7、驱动线圈8、防抖线圈9、磁钢10、柔性线路板11以及霍尔传感器12。
所述支撑框架2具有收容空间20，所述支撑框架2支撑于所述底座1。
所述外壳3盖设于所述底座1并使得所述支撑框架2位于所述外壳3内。
镜筒4、上弹片5、下弹片6、防抖悬丝7、驱动线圈8、防抖线圈9、磁钢10、柔性线路板11以及霍尔传感器12均收容于外壳3内。
所述镜筒4收容于所述收容空间20内，用于安装镜片组。
所述上弹片5一端沿所述镜筒4的光轴方向固定于所述支撑框架2的顶端，另一端沿所述光轴方向固定于所述镜筒4的顶端，从而将镜筒4弹性悬置于收容空间20内。本实施方式中，所述上弹片5设有导电通路，用于实现电信号的传递。比如，上弹片5为FPC，导电通路则为FPC上的导电线路实现。
本实施方式中，所述上弹片5包括两个且分别将所述镜筒4悬置于所述收容空间20内，两个所述上弹片5相互绝缘设置且共同围成环状，每一所述上弹片5形成一所述导电通路，以实现电信号的正、负两极传输。本实施方式中，两个所述上弹片5相互之间关于所述镜筒4呈中心对称设置。当然，两个上弹片5也可为一整体结构，只需要将两条导电通路相互绝缘即可，这是容易想到的。
所述下弹片6的一端沿所述光轴方向固定于所述支撑框架2的底端，另一端沿所述光轴方向固定于所述镜筒4的底端。所述上弹片5和所述下弹片6共同将所述镜筒4弹性支撑于所述收容空间20内，用于提供自动调焦（AF）功能时对镜筒的回复力；
所述防抖悬丝7为金属导电材料制成，其包括多根且分别间隔环绕所述支撑框架2设置。每一所述防抖悬丝7的一端固定于所述底座1，另一端固定于所述上弹片5并与上弹片5形成电性连接。
所述防抖悬丝7用于提供防抖（OIS）功能时对支撑框架2的回复力。
本实施方式中，所述支撑框架2呈矩形结构，所述防抖悬丝7包括四个且分别设置于所述支撑框架2的四个角的位置，以提高稳定性和可靠性。
所述磁钢10包括沿垂直于所述光轴方向分别固定于所述支撑框架2相对两侧的第一驱动磁钢101和固定于所述支撑框架2另外相对两侧的第二驱动磁钢102，每一所述磁钢10均为单极充磁，如图4所示，磁钢10的相对两侧均仅设置单个磁极。所述驱动线圈8套设固定于所述镜筒4的外周并与所述磁钢10间隔，所述驱动线圈8与所述上弹片5电性连接，所述磁钢10用于驱动所述驱动线圈8沿所述光轴方向（Z轴方向）运动，驱动线圈8带动镜筒4沿光轴方向运动，实现自动调焦（AF）功能。本实施方式中，所述磁钢10的充磁方向与所述驱动线圈8的绕线平面平行。
当然，也可以是每一所述磁钢10的充磁方向均垂直于所述光轴方向。
所述防抖线圈9包括固定于所述外壳3并与所述第一驱动磁钢101间隔相对的第一防抖线圈91和固定于所述外壳3并与所述第二驱动磁钢102间隔相对的第二防抖线圈92。即第一防抖线圈91和第二防抖线圈92沿镜筒4的径向间隔环设于支撑框架2，该结构设置使得防抖线圈9不占用镜头驱动装置100沿光轴（Z轴方向）的空间，有效的减小了镜头驱动装置100沿光轴方向的厚度，利于产品的薄型化需求，同时简化了装配方式，提高了装配效率。
所述第一防抖线圈91位于所述第一驱动磁钢101的磁场范围内并驱动所述第一驱动磁钢101沿垂直于所述光轴方向的第一方向移动；所述第二防抖线圈92位于所述第二驱动磁钢102的磁场范围内并驱动所述第二驱动磁钢102沿垂直于所述光轴方向的第二方向移动；其中，所述第一方向与所述第二方向相互垂直，本实施方式中，第一方向定义为X轴方向，第二方向定义为Y轴方向。
本实施方式中，防抖线圈9为预绕制形成，并且所述防抖线圈9的绕线方向所在的平面与光轴方向平行，该结构的形成的防抖驱动方式相比于现有技术中多层线路板结构的防抖驱动方式，其成本可以大幅度降低。
所述霍尔传感器12固定于所述底座1用以检测所述镜筒4在所述第一方向（X轴方向）和所述第二方向（Y轴方向）的位移。
所述柔性线路板11包括驱动线路板111和防抖线路板112。
所述驱动线路板111贴设于所述底座1并与所述霍尔传感器12形成电性连接，所述上弹片5通过所述防抖悬丝7与所述驱动线路板111形成电性连，也就是说，驱动线圈8依次通过上弹片5和防抖悬丝7与驱动线路板111形成电连接，用以传输实现AF功能的信号。
所述防抖线路板112贴设于所述外壳3，所述防抖线圈9固定于所述防抖线路板112并与所述防抖线路板112形成电性连接，用以传输实现OIS功能的信号。
上述双线路板(FPC)结构的设置使得装配方式简单，相较于多层电路板引出信号的结构其生产成本更低。
更优的，所述驱动线路板111由所述底座1处弯折延伸至所述外壳3外部以形成驱动引脚部111a，用以将实现AF功能的信号接入；所述防抖线路板112由所述底座1处弯折延伸至所述外壳3外部以形成防抖引脚部112a，用以将实现OIS功能的信号接入。
本实施方式中，所述驱动引脚部111a与所述防抖引脚部112a分别位于所述底座1的相对两侧，使得连接外部信号线更方便。
与相关技术相比，本实用新型镜头驱动装置中，将多个磁钢分别固定于支撑框架周侧，且磁钢分为第一驱动磁钢和第二驱动磁钢，且每一磁钢为单极充磁，驱动线圈套设固定于镜筒外侧并与磁钢间隔，所有磁钢驱动所述驱动线圈沿镜筒的光轴方向移动，并通过上弹片与下弹片提供回复力，驱动线圈带动镜筒沿光轴方向正、负向移动，实现自动调焦（AF）功能；防抖线圈固定于外壳，第一防抖线圈位于第一驱动磁钢的磁场范围内并驱动第一驱动磁钢沿垂直于所述光轴方向的第一方向移动，通过防抖悬丝提供回复力，实现水平X方向的防抖（OIS-X）功能；第二防抖线圈位于第二驱动磁钢的磁场范围内并驱动第二驱动磁钢沿垂直于光轴方向的第二方向移动，通过防抖悬丝提供回复力，实现水平Y方向的防抖（OIS-Y）功能。上述结构中，磁钢因单极充磁，同时与防抖线圈及驱动线圈作用，从而减少了磁钢的数量，简化了装配工艺；防抖线圈沿垂直于光轴方向环绕于支撑框架并固定于外壳，在实现防抖功能的同时，避免了占用镜头驱动装置沿光轴上的空间，有效的减小了镜头驱动装置沿光轴方向的厚度，且简化了装配方式，且预绕制的防抖线圈进行OIS驱动相比于传统的多层电路板驱动而言，较大程度的降低了生产成本。驱动线路板与霍尔传感器及驱动线圈电连接用以引出信号，所述防抖线路板与防抖线圈形成电性连接用以引出信号，双FPC结构设置使得装配简单，相较于多层电路板引出信号的结构其生产成本更低。
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 (5)
- 一种镜头驱动装置，其包括：底座；支撑框架，所述支撑框架具有收容空间，所述支撑框架支撑于所述底座；外壳，所述外壳盖设于所述底座并使得所述支撑框架位于所述外壳内；镜筒，所述镜筒收容于所述收容空间内，用于安装镜片组；上弹片，所述上弹片一端沿所述镜筒的光轴方向固定于所述支撑框架的顶端，另一端沿所述光轴方向固定于所述镜筒的顶端；所述上弹片设有导电通路；下弹片，所述下弹片的一端沿所述光轴方向固定于所述支撑框架的底端，另一端沿所述光轴方向固定于所述镜筒的底端；所述上弹片和所述下弹片共同将所述镜筒弹性支撑于所述收容空间内；以及，收容于所述外壳内的防抖悬丝、驱动线圈、防抖线圈、磁钢、柔性线路板以及霍尔传感器，其特征在于，所述防抖悬丝为金属导电材料制成，其包括多根且分别间隔环绕所述支撑框架设置，每一所述防抖悬丝的一端固定于所述底座，另一端固定于所述上弹片并形成电性连接；所述磁钢为单极充磁，包括沿垂直于所述光轴方向分别固定于所述支撑框架相对两侧的第一驱动磁钢和固定于所述支撑框架另外相对两侧的第二驱动磁钢；所述驱动线圈套设固定于所述镜筒的外周并与所述磁钢间隔，所述驱动线圈与所述上弹片电性连接，所述磁钢的充磁方向与所述驱动线圈的绕线平面平行并驱动所述驱动线圈沿所述光轴方向运动；所述防抖线圈为预绕制形成，且所述防抖线圈的绕线平面与所述光轴方向平行，其包括固定于所述外壳并与所述第一驱动磁钢沿垂直于所述光轴方向间隔相对的第一防抖线圈和固定于所述外壳并与所述第二驱动磁钢沿垂直于所述光轴方向间隔相对的第二防抖线圈，所述第一防抖线圈位于所述第一驱动磁钢的磁场范围内并驱动所述第一驱动磁钢沿垂直于所述光轴方向的第一方向移动；所述第二防抖线圈位于所述第二驱动磁钢的磁场范围内并驱动所述第二驱动磁钢沿垂直于所述光轴方向的第二方向移动；其中，所述第一方向与所述第二方向相互垂直；所述霍尔传感器固定于所述底座用以检测所述镜筒在所述第一方向和所述第二方向的位移；所述柔性线路板包括驱动线路板和防抖线路板，所述驱动线路板贴设于所述底座并与所述霍尔传感器形成电性连接，所述上弹片通过所述防抖悬丝与所述驱动线路板形成电性连接；所述防抖线路板贴设于所述外壳，所述防抖线圈固定于所述防抖线路板并与所述防抖线路板形成电性连接；所述驱动线路板由所述底座处弯折延伸至所述外壳外部以形成驱动引脚部，所述防抖线路板由所述底座处弯折延伸至所述外壳外部以形成防抖引脚部，所述驱动引脚部与所述防抖引脚部分别位于所述底座的相对两侧。
- 根据权利要求1所述的镜头驱动装置，其特征在于，所述上弹片包括两个且分别将所述镜筒悬置于所述收容空间内，两个所述上弹片相互绝缘设置且共同围成环状，每一所述上弹片形成一所述导电通路。
- 根据权利要求2所述的镜头驱动装置，其特征在于，两个所述上弹片相互之间关于所述镜筒呈中心对称设置。
- 根据权利要求1所述的镜头驱动装置，其特征在于，所述支撑框架呈矩形结构，所述防抖悬丝包括四个且分别设置于所述支撑框架的四个角的位置。
- 根据权利要求1所述的镜头驱动装置，其特征在于，每一所述磁钢的充磁方向均垂直于所述光轴方向。
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| CN107193105A (zh) * | 2017-04-12 | 2017-09-22 | 瑞声科技(新加坡)有限公司 | 镜头驱动装置 |
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| CN111787735A (zh) * | 2020-07-21 | 2020-10-16 | 新思考电机有限公司 | 一种fpc板连接结构、照相装置、电子产品 |
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