CN110673297A - Automatic focusing and anti-shaking driving device for micro optical lens - Google Patents
Automatic focusing and anti-shaking driving device for micro optical lens Download PDFInfo
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- CN110673297A CN110673297A CN201911097790.9A CN201911097790A CN110673297A CN 110673297 A CN110673297 A CN 110673297A CN 201911097790 A CN201911097790 A CN 201911097790A CN 110673297 A CN110673297 A CN 110673297A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 82
- 239000000725 suspension Substances 0.000 claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 3
- 230000006698 induction Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 2
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 44
- 230000006870 function Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910000734 martensite Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- 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
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- 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
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- 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
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adjustment Of Camera Lenses (AREA)
- Lens Barrels (AREA)
Abstract
The invention relates to a driving device for automatically focusing and preventing shaking of a micro optical lens, which is provided with a supporting module and a moving part suitable for lens installation and assembly, wherein the supporting module is embedded with an FPC (flexible printed circuit) board with a sensor, and the sensor is electrically connected with a control system of the micro optical lens; the moving part is assembled on the supporting module through a suspension system, so that the moving part moves along the optical axis of the lens; the driving mechanism further comprises a first pair of driving modules and a second pair of driving modules which are driven based on the principle that the SMA wire is heated to shrink, and the driving moving parts of the first pair of driving modules and the second pair of driving modules move in opposite directions along the optical axis of the lens; the single-side independent control driving of the first pair of driving modules and the second pair of driving modules realizes the angle control of the lens around the X axis and the Y axis, so as to achieve the inclination angle adjustment type optical anti-shake; the sensor feeds back a Z-direction position signal of the moving part and the inclination angle of the moving part, and focusing displacement and inclination angle feedback of the lens are realized. The product structure is light and handy and miniaturized, and control is simple and convenient, accurate.
Description
Technical Field
The invention relates to the technical field of micro optical lenses, in particular to the technical field of micro optical lens focusing applied to portable electronic equipment such as mobile phones or tablet computers.
Background
With the development and popularization of portable electronic devices such as mobile phones and tablet computers, the requirement for the camera function attached to the portable electronic devices is relatively increased. In order to focus and zoom the micro optical lens, a driving device is required to be disposed in a narrow space of the micro optical lens to drive the lens to move along the optical axis. The space is small, which limits the types of drive mechanisms that can be used. In the micro optical lens in the prior art, the driving is mainly realized by using a magnet and coil structure, but the structure is relatively complex, the volume is difficult to reduce, and the requirement of product miniaturization cannot be met.
Meanwhile, the micro automatic focusing micro optical lens is widely applied to products such as mobile phones, automobiles, unmanned planes, security monitoring, smart homes and the like. The common miniature automatic focusing miniature optical lens module is driven by a miniature voice coil motor to move up and down in the direction of an optical axis, and the voice coil motor is driven to move through a control chip during photographing, so that the automatic focusing function is realized. When the miniature optical lens is used for taking a picture or taking a picture, the lens cannot keep absolute stability due to human shake or other reasons, a certain offset is generated, and at the moment, the focusing and light incoming amount of the miniature optical lens are influenced, so that the quality of the image acquired by the miniature optical lens is influenced. Generally, such lens deflection occurs in a direction perpendicular to the optical axis, and the auto-focus voice coil motor can only drive the lens to move in the optical axis direction, so that the problem caused by such lens deflection cannot be solved. An optical anti-shake actuator is added on the basis of an automatic focusing voice coil motor to drive the lens to move in two directions vertical to the optical axis, so that the deflection of the lens can be compensated, and the micro optical lens is helped to acquire better image quality, and the micro optical lens motor is called as a micro optical anti-shake micro optical lens motor.
The real sense of the micro optical anti-shake micro optical lens motor is a closed-loop control system, the gyroscope detects the shake parameters of the lens and feeds the shake parameters back to the control chip of the micro optical lens module, and the control chip calculates the corrected angle or displacement according to the position information provided by the lens sensor and sends an instruction to drive the anti-shake actuator to reach the specified position, so that the displacement deflection of the lens caused by shake is corrected, and the photographing or the shooting can obtain better image quality.
In the prior art, the same method can be adopted in two directions perpendicular to the optical axis as driving the lens to move in the optical axis direction, that is, the method can be realized by adopting a miniature voice coil motor. The common miniature voice coil motor generates Lorentz magnetic force in a magnetic field by an electrified coil to drive the lens to move; however, to realize optical anti-shake, the lens needs to be driven in at least two directions, which means that a plurality of coils need to be arranged, and thus, the miniaturization of the whole structure is challenging. For this reason, the micro-actuator using the voice coil motor principle for optical anti-shake generally integrates a plurality of coils on one circuit board, which is called as FP coil, thereby solving the size problem of the optical anti-shake actuator. However, the micro vcm optical anti-shake actuator and the autofocus micro vcm are separate, and the lens is usually mounted in the autofocus micro vcm, and the lens is moved in a direction perpendicular to the optical axis, that is, the lens moves along with the autofocus micro vcm. Therefore, the assembly process of the micro optical anti-shake micro optical lens module is more difficult, the structural reliability of the whole micro motor is reduced, the requirement of product miniaturization is difficult to meet, and meanwhile, the Z direction of the micro voice coil motor is lack of displacement feedback, so that the quality of photographing or shooting is influenced.
Disclosure of Invention
The invention aims to provide a driving device for automatic focusing and anti-shaking of a miniature optical lens, which meets the miniaturization requirement of products, obtains better focusing performance for driving the lens to move along an optical axis and also realizes anti-shaking; and the real-time position signal feedback is carried out in the Z direction of automatic focusing, so that the quality of photographing or shooting is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the driving device for the automatic focusing and the anti-shaking of the micro optical lens is provided with a supporting module and a moving part suitable for lens installation and assembly, wherein the supporting module is formed by overlapping a bottom plate and an upper seat, an FPC (flexible printed circuit) board is embedded between the bottom plate and the upper seat, a sensor is arranged on the FPC board, and the sensor is electrically connected with a control system of the micro optical lens; the moving part is assembled on the support module through a suspension system, and the suspension system guides the moving part to move along the optical axis of the lens; the first pair of driving modules are symmetrically arranged on two opposite sides of the moving component, and the second pair of driving modules are symmetrically arranged on the remaining two opposite sides of the moving component; the first pair of driving modules and the second pair of driving modules are driven based on the principle that the SMA wire is heated to contract, the first pair of driving modules are provided with first driving arms for pushing the moving part to move along the optical axis of the lens, the second pair of driving modules are provided with second driving arms for pushing the moving part to move along the optical axis of the lens, and the driving moving parts of the first pair of driving modules and the second pair of driving modules are opposite in moving direction along the optical axis of the lens; the single-side independent control driving of the first pair of driving modules and the second pair of driving modules realizes the angle control of the lens around the X axis and/or the Y axis, and realizes the inclination angle adjustment type optical anti-shake; the sensor feeds back a Z-direction position signal of the moving part and the inclination angle of the moving part, and focusing displacement and inclination angle feedback of the lens are achieved.
The single body of the first pair of driving modules comprises two first driving arms, a first SMA wire and two first conductive supports, wherein the first conductive supports are fixed on the support module and electrically connected with the control system of the micro optical lens, the first conductive supports are provided with first elastic arms capable of opening and closing, the two first driving arms and the first SMA wire form a movable triangular relation, two ends of the first SMA wire are respectively connected with the first elastic arms on the two first conductive supports, one end of each first driving arm is connected with the first elastic arm corresponding to the first conductive support, and the other end of each first driving arm is hinged with the moving part; the single body of the second pair of driving modules comprises two second driving arms, a second SMA wire and two second conductive supports, the second conductive supports are fixed on the supporting module and electrically connected with the control system of the micro optical lens, the second conductive supports are provided with second elastic arms capable of opening and closing, the two second driving arms and the second SMA wire form a movable triangular relation, two ends of the second SMA wire are respectively connected with the second elastic arms on the two second conductive supports, one end of each second driving arm is connected with the second elastic arm corresponding to the second conductive support, and the other end of each second driving arm is hinged with the moving part.
The suspension system further comprises an upper spring and a lower spring, wherein the upper spring and the lower spring are respectively connected between the upper end and the lower end of the moving part and the support module; the upper spring comprises an upper inner ring and a first flexible part led out from the periphery of the upper inner ring, the upper inner ring is fixedly connected with the upper end of the moving part, and the tail end of the first flexible part is fixedly connected with the support module; the lower spring comprises a lower inner ring and a second flexible part led out from the periphery of the lower inner ring, the lower inner ring is fixedly connected with the lower end of the moving part, and the tail end of the second flexible part is fixedly connected with the support module.
The scheme is further that the upper seat is provided with a vacancy avoiding position for accommodating and assembling the sensor, the sensor is arranged on the peripheral side of the moving part, the moving part is provided with an induction part, and the induction part and the sensor are matched for closed-loop control; the upper side of the upper seat, which is far away from the bottom plate, is provided with an upward-protruding column, and the column is matched with a suspension system and is installed with a first pair of driving modules and a second pair of driving modules; and the hinge parts are respectively hinged with a first driving arm of the first pair of driving modules and a second driving arm of the second pair of driving modules.
In the above scheme, the two first drive arms and the first SMA wire form an isosceles triangle relationship, the two second drive arms and the second SMA wire also form an isosceles triangle relationship, the first SMA wire and the second SMA wire are the bottom side of the isosceles triangle, and the first SMA wire and the second SMA wire are arranged in a vertically staggered manner in the axial direction of the relative motion component.
In the above scheme, the two first driving arms are respectively integrally formed with the two first conductive supports; the two second driving arms are respectively and integrally formed with the two second conductive supports, and the first elastic arm and the second elastic arm are designed to be inverted relatively.
According to the scheme, the supporting module is further covered with an outer cover, the outer cover covers the moving part, the first pair of driving modules and the second pair of driving modules, and the FPC circuit board is provided with ports or welding pads electrically connected with other parts.
The invention utilizes the characteristic that an SMA (shape Memory alloys) wire is heated to shrink, is used for manufacturing a driving device of a miniature optical lens module of a mobile phone or a tablet personal computer, can drive a lens to move up and down to realize the automatic focusing function of the lens, and can adjust the inclination angles of the lens around an X axis and a Y axis by driving the movement of different sides of the lens, thereby realizing the OIS (optical anti-shake) function by adjusting the inclination angle of the lens and improving the service performance of the miniature optical lens. The SMA wire body is small, the driving structure is effectively simplified, the requirement of product miniaturization is met, the product structure is light and compact, the manufacturing cost is reduced, and meanwhile, the control is simple, convenient and accurate, and the SMA wire body is suitable for popularization and utilization. The automatic focusing device is provided with the sensor, the sensor feeds back a Z-direction position signal of automatic focusing and the inclination angle of the moving part, the focusing displacement and the inclination angle feedback of the lens are realized, the focusing positioning is more accurate, and the photographing or the shooting can obtain better image quality.
Description of the drawings:
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a first pair of driving modules of the embodiment shown in FIG. 1;
FIG. 3 is a schematic structural diagram of a second pair of driving modules according to the embodiment of FIG. 1;
FIG. 4 is a schematic diagram of the moving parts of the embodiment of FIG. 1;
FIG. 5 is a schematic diagram of the support module of the embodiment of FIG. 1;
FIG. 6 is a schematic diagram of the upper spring structure of the embodiment of FIG. 1;
fig. 7 is a schematic view of the lower spring structure of the embodiment of fig. 1.
The specific implementation mode is as follows:
the conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 ~ 7, which is a schematic view of a preferred embodiment of the present invention, the present invention relates to a driving device for automatically focusing and preventing shake of a micro optical lens, which comprises a supporting module 1 and a moving member 2 suitable for lens mounting and arrangement, and further comprises a control system inherent to a micro optical lens device and a corresponding outer cover (not shown), wherein the outer cover covers the moving member 2, a first pair of driving modules 4 and a second pair of driving modules 5, the supporting module 1 is adapted to be mounted on a portable electronic device such as a mobile phone or a tablet computer, the supporting module 1 is formed by stacking a bottom plate 11 and an upper base 12, and an FPC board 6 is embedded between the bottom plate 11 and the upper base 12, the FPC board 6 is provided with ports or pads electrically connected to other components, the FPC board 6 is provided with a sensor 7, the sensor 7 is electrically connected to the control system of the micro optical lens, the moving member 2 is assembled on the supporting module 1 by a suspension system 3, the moving member 2 is assembled to the moving along an optical axis of the moving member 2, an assembling hole is formed in the middle of the moving member 2, the moving arm is satisfied by assembling of the lens elements, the lens assembly 2, the lens assembly is assembled to the lens module 2 by a pair of the lens suspension system, the moving member 2, the lens module 2, the driving module 2, the lens module 2 is assembled to be assembled to a lens assembly, the lens module, the lens assembly is assembled to be.
Referring to fig. 1, 2 and 3, in the present embodiment, the single body of the first pair of driving modules 4 includes two first driving arms 41, a first SMA wire 42 and two first conductive supports 43, and the first conductive supports 43 are fixed on the supporting module 1 and electrically connected to the control system of the micro optical lens. The first conductive support 43 is provided with an openable first elastic arm 431, the two first driving arms 41 and the first SMA wire 42 form a movable triangular relationship, two ends of the first SMA wire 42 are respectively connected with the first elastic arms 431 on the two first conductive supports 43, one end of each first driving arm 41 is connected with the first elastic arm 431 corresponding to the first conductive support 43, and the other end of each first driving arm 41 is hinged with the moving part 2. The single body of the second pair of driving modules 5 includes two second driving arms 51, a second SMA wire 52 and two second conductive supports 53, the second conductive supports 53 are fixed on the support module 1 and electrically connected to the control system of the micro optical lens, the second conductive supports 53 are provided with second elastic arms 531 capable of opening and closing, the two second driving arms 51 and the second SMA wire 52 form a movable triangular relationship, two ends of the second SMA wire 52 are respectively connected to the second elastic arms 531 on the two second conductive supports 53, one end of the second driving arm 51 is connected to the second elastic arm 531 corresponding to the second conductive support 53, and the other end of the second driving arm 51 is hinged to the moving part 2. The SMA wire (such as a nickel-titanium memory alloy wire) is in a martensite structure at normal temperature, and when the temperature is increased, the SMA wire can generate phase change, the martensite is converted into austenite, the length is shortened, and the resistance is reduced; when the temperature is lowered, the SMA wire undergoes a phase transition from austenite to martensite, the length thereof is increased, and the electric resistance thereof is increased. During the phase transformation, the temperature and strain of the SMA wire are not very linear, but its resistance is linear with strain over a certain temperature range. Therefore, the length of the SMA wire can be accurately controlled by controlling the resistance of the SMA wire, and the position and the moving distance of the driving device are calculated according to the resistance of the SMA wire. Therefore, the control system is used for electrifying and heating the first SMA wire 42 and/or the second SMA wire 52, the SMA wires can contract, the corresponding triangular relation is changed, the corresponding first driving arm 41 and/or the second driving arm 51 push the moving part 2 to move along the optical axis of the lens, the focusing and zooming of the micro optical lens are realized, and the moving part 2 can be stably and accurately driven to carry out focusing movement with the lens by utilizing the relative stability of the triangle. In this embodiment, the first pair of driving modules 4 are symmetrically disposed on two opposite sides of the moving component 2, the second pair of driving modules 5 are symmetrically disposed on the two remaining opposite sides of the moving component 2, and the driving moving components 2 of the first pair of driving modules 4 and the second pair of driving modules 5 move in opposite directions along the optical axis of the lens, so that when focusing is realized, different driving modules can be powered on by a control system of the micro optical lens, different side movements of the moving component 2 occur, and thus, the tilt angles of the lens around the X axis and the Y axis can be adjusted, so that the OIS (optical anti-shake) function is realized by adjusting the tilt angle of the lens, and the usability of the micro optical lens is improved.
Referring to fig. 1, 2 and 3, in this embodiment, the two first driving arms 41 and the first SMA wire 42 form an isosceles triangle relationship, and the two second driving arms 51 and the second SMA wire 52 also form an isosceles triangle relationship, where the first SMA wire 42 and the second SMA wire 52 are the bottom side of the isosceles triangle, and the first SMA wire 42 and the second SMA wire 52 are arranged in a vertically staggered manner and are horizontal with respect to the axial direction of the moving part 2, so that the structure is more stable in operation and more accurate in control. Further, the two first driving arms 41 are respectively integrally formed with the two first conductive supports 43, and the first driving arms 41 are integrally extended from the first elastic arms 431 of the first conductive supports 43; the two second driving arms 51 are respectively and integrally formed with the two second conductive supports 53, the second driving arms 51 are integrally extended from the second elastic arms 531 of the second conductive supports 53, the first elastic arms 431 and the second elastic arms 531 are designed in an inverted manner, the structure is optimized, the manufacturing and the assembly are convenient, and the first conductive supports 43 and the second conductive supports 53 are connected with a control system circuit of the micro optical lens through welding.
1 ~ 7, in this embodiment, the upper base 12 has a space for accommodating and assembling the sensor 7, the sensor 7 is disposed around the moving component 2, the number of the sensors may be one or more, the moving component 2 is provided with a sensing portion 22, the sensing portion 22 cooperates with the sensor 7 for closed-loop control, the sensor 7 is preferably a hall sensor, the sensor 7 is surface-mounted on a pad preset on the FPC board 6, the sensor 7 cooperates with the sensing portion 22 on the moving component 2 for feeding back a signal, the sensing portion 22 is provided with a magnet, the movement of the lens is controlled in a closed-loop manner by the feedback signal of the sensor 7, the movement deviation of the moving component 2 can be corrected to obtain precise control, the upper side of the upper base 12 facing away from the bottom board 11 is provided with an upwardly protruding pillar 121, the pillar 121 is adapted to the suspension system 3 and is mounted on the first pair of driving modules 4 and the second pair of driving modules 5, the hinge portion 21 is provided on the circumference of the moving component 2, the hinge portion 21 is respectively hinged to the first driving arm 41 of the first pair of the first driving module 4 and the second pair of driving modules 5, the driving modules 4, the driving modules are mounted to form a suspension drive pair, the suspension system 3, the upper spring 31, the lower spring support system 31 is connected with the upper end of the lens 2, the lens, the lower spring support module 2, the lens support module 2 is connected to the upper end of the lens, the lens support module 2, the lens support module 311, the lens support module 2 is connected to the lens support module, the lens support module 2 is connected to form a simple structure, the lens.
The invention utilizes the characteristic that an SMA (shape Memory alloys) wire is heated to shrink, is used for manufacturing a driving device of a miniature optical lens module of a mobile phone or a tablet personal computer, can drive a lens to move up and down to realize the automatic focusing function of the lens, and can adjust the inclination angles of the lens around an X axis and a Y axis by driving the movement of different sides of the lens, thereby realizing the OIS (optical anti-shake) function by adjusting the inclination angle of the lens and improving the service performance of the miniature optical lens. The SMA wire body is small, the driving structure is effectively simplified, the requirement of product miniaturization is met, the product structure is light and compact, the manufacturing cost is reduced, and meanwhile, the control is simple, convenient and accurate, and the SMA wire body is suitable for popularization and utilization. The sensor is arranged and feeds back a Z-direction position signal of automatic focusing, so that focusing displacement feedback of the lens is realized, focusing positioning is more accurate, and better image quality is obtained by photographing or shooting.
While the preferred embodiments of the invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. The driving device for automatic focusing and anti-shaking of the miniature optical lens is characterized in that: the micro-optical lens driving device is provided with a supporting module (1) and a moving part (2) suitable for lens installation and assembly, wherein the supporting module (1) is formed by overlapping a bottom plate (11) and an upper seat (12), an FPC (flexible printed circuit) board (6) is embedded between the bottom plate (11) and the upper seat (12), a sensor (7) is arranged on the FPC (6), and the sensor (7) is electrically connected with a control system of the micro-optical lens; the moving part (2) is assembled on the support module (1) through a suspension system (3), and the suspension system (3) guides the moving part (2) to move along the optical axis of the lens; the device also comprises a first pair of driving modules (4) and a second pair of driving modules (5), wherein the first pair of driving modules (4) are symmetrically arranged on two opposite sides of the moving component (2), and the second pair of driving modules (5) are symmetrically arranged on the remaining two opposite sides of the moving component (2); the first pair of driving modules (4) and the second pair of driving modules (5) are driven based on the principle that the SMA wire is heated to contract, the first pair of driving modules (4) are provided with first driving arms (41) to push the moving part (2) to move along the optical axis of the lens, the second pair of driving modules (5) are provided with second driving arms (51) to push the moving part (2) to move along the optical axis of the lens, and the driving moving parts (2) of the first pair of driving modules (4) and the second pair of driving modules (5) move in opposite directions along the optical axis of the lens; the single-side independent control driving of the first pair of driving modules (4) and the second pair of driving modules (5) realizes the angle control of the lens around the X axis and/or the Y axis, and realizes the inclination angle adjustment type optical anti-shake; the sensor (7) feeds back a Z-direction position signal of the moving part (2) and the inclination angle of the moving part (2), and focusing displacement and inclination angle feedback of the lens are achieved.
2. The driving apparatus for auto-focusing and anti-shaking of a micro optical lens according to claim 1, wherein: the single body in the first pair of driving modules (4) comprises two first driving arms (41), a first SMA wire (42) and two first conductive supports (43), the first conductive supports (43) are fixed on the support module (1) and electrically connected with a control system of the micro optical lens, the first conductive supports (43) are provided with first elastic arms (431) capable of opening and closing, the two first driving arms (41) and the first SMA wire (42) form a movable triangular relation, two ends of the first SMA wire (42) are respectively connected with the first elastic arms (431) on the two first conductive supports (43), one end of each first driving arm (41) is connected with the corresponding first elastic arm (431) of the first conductive support (43), and the other end of each first driving arm (41) is hinged with the moving part (2); the single body of the second pair of driving modules (5) comprises two second driving arms (51), a second SMA wire (52) and two second conductive supports (53), the second conductive supports (53) are fixed on the support module (1) and electrically connected with a control system of the micro optical lens, the second conductive supports (53) are provided with second elastic arms (531) capable of opening and closing, the two second driving arms (51) and the second SMA wire (52) form a movable triangular relation, two ends of the second SMA wire (52) are respectively connected with the second elastic arms (531) on the two second conductive supports (53), one end of each second driving arm (51) is connected with the second elastic arm (531) corresponding to the second conductive support (53), and the other end of each second driving arm (51) is hinged with the moving part (2).
3. The driving apparatus for auto-focusing and anti-shaking of a micro optical lens according to claim 1, wherein: the suspension system (3) comprises an upper spring (31) and a lower spring (32), and the upper spring (31) and the lower spring (32) are respectively connected between the upper end and the lower end of the moving part (2) and the support module (1); the upper spring (31) comprises an upper inner ring (311) and a first flexible part (312) led out from the periphery of the upper inner ring (311), the upper inner ring (311) is fixedly connected with the upper end of the moving component (2), and the tail end of the first flexible part (312) is fixedly connected with the support module (1); the lower spring (32) comprises a lower inner ring (321) and a second flexible part (322) led out from the periphery of the lower inner ring (321), the lower inner ring (321) is fixedly connected with the lower end of the moving component (2), and the tail end of the second flexible part (322) is fixedly connected with the support module (1).
4. The driving apparatus for auto-focusing and anti-shaking of a micro optical lens according to claim 1, wherein: the upper seat (12) is provided with a space avoiding position for accommodating and assembling the sensors (7), the sensors (7) are arranged on the periphery of the moving part (2), the number of the sensors (7) is one or more, the moving part (2) is provided with an induction part (22), and the induction part (22) is matched with the sensors (7) for closed-loop control; the upper side of the upper seat (12) departing from the bottom plate (11) is provided with a stand column (121) protruding upwards, and the stand column (121) is matched with the suspension system (3) and is installed with the first pair of driving modules (4) and the second pair of driving modules (5); the side of the moving component (2) is provided with a hinge part (21), and the hinge part (21) is respectively hinged with a first driving arm (41) of the first pair of driving modules (4) and a second driving arm (51) of the second pair of driving modules (5).
5. The driving apparatus for auto-focusing and anti-shaking of micro optical lens according to claim 2, wherein: the two first driving arms (41) and the first SMA wire (42) form an isosceles triangle relationship, the two second driving arms (51) and the second SMA wire (52) also form the isosceles triangle relationship, the first SMA wire (42) and the second SMA wire (52) are the bottom sides of the isosceles triangle, and the first SMA wire (42) and the second SMA wire (52) are arranged in a vertically staggered mode relative to the axial direction of the moving part (2).
6. The driving apparatus for automatically focusing and anti-shaking of micro-optical lens according to claim 2 or 5, wherein: the two first driving arms (41) are respectively integrally formed with the two first conductive supports (43); the two second driving arms (51) are respectively and integrally formed with the two second conductive supports (53), and the first elastic arm (431) and the second elastic arm (531) are designed to be inverted relatively.
7. The driving apparatus for auto-focusing and anti-shaking of a micro optical lens according to claim 1, wherein: the support module (1) is further covered with an outer cover, the outer cover covers the moving part (2), the first pair of driving modules (4) and the second pair of driving modules (5), and ports or welding pads electrically connected with other parts are arranged on the FPC circuit board (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911097790.9A CN110673297A (en) | 2019-11-12 | 2019-11-12 | Automatic focusing and anti-shaking driving device for micro optical lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911097790.9A CN110673297A (en) | 2019-11-12 | 2019-11-12 | Automatic focusing and anti-shaking driving device for micro optical lens |
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| CN110673297A true CN110673297A (en) | 2020-01-10 |
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| CN201911097790.9A Pending CN110673297A (en) | 2019-11-12 | 2019-11-12 | Automatic focusing and anti-shaking driving device for micro optical lens |
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| CN110749971A (en) * | 2019-11-22 | 2020-02-04 | 东莞市亚登电子有限公司 | SMA actuator, camera module, and electronic apparatus |
| CN111197557A (en) * | 2020-03-13 | 2020-05-26 | 厦门新鸿洲精密科技有限公司 | Voice coil motor |
| CN112612101A (en) * | 2021-01-05 | 2021-04-06 | 广州立景创新科技有限公司 | Lens positioning device |
| CN113530774A (en) * | 2020-03-31 | 2021-10-22 | 斯玛特技研有限公司 | Three-axis focusing motor using SMA wire |
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| WO2022078386A1 (en) * | 2020-10-14 | 2022-04-21 | 宁波舜宇光电信息有限公司 | Driving structure for use in optical actuator, corresponding photographing module, and assembly method |
| CN114415443A (en) * | 2020-10-14 | 2022-04-29 | 宁波舜宇光电信息有限公司 | Driving structure for optical actuator and corresponding camera module |
| CN114531527A (en) * | 2020-10-30 | 2022-05-24 | 宁波舜宇光电信息有限公司 | Optical anti-shake camera module |
| CN114449159A (en) * | 2020-11-06 | 2022-05-06 | 宁波舜宇光电信息有限公司 | Driving structure for optical anti-shake camera module and corresponding camera module |
| WO2022105748A1 (en) * | 2020-11-17 | 2022-05-27 | 华为技术有限公司 | Sma motor, camera module and electronic device |
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